Terminal device, network device and method

Abstract

An exemplary embodiment of the present disclosure relates to an effective mechanism for processing CSI reporting. In this solution, a terminal device receives at least one configuration for channel state information (CSI) feedback from a network device, and transmits CSI feedback to the network device based on the at least one configuration, the CSI feedback including multiple partitions with different omission priorities, the multiple partitions including parameters associating multiple first vectors, multiple second vectors, and multiple third vectors. In this way, by associating the parameters with the three types of vectors, TD / DD information can be reported together with SD information and FD information.

Description

[Technical Field]

[0001] FIELD Exemplary embodiments of the present disclosure relate generally to the field of communications technologies, and more particularly to methods, apparatus, and media for configuring and transmitting channel state information (CSI) feedback. [Background technology]

[0002] To meet the increasing demand for wireless data traffic, several schemes have been proposed and implemented, among which Multiple Input Multiple Output (MIMO) technology is considered one of the powerful schemes for achieving high data throughput in communication systems. MIMO includes the function of supporting the utilization of multiple antenna elements in network devices (e.g., base stations (BSs)) for both frequency bands below 6 GHz and above 6 GHz.

[0003] Generally speaking, during communication between the terminal device and the network device, the terminal device needs to report CSI feedback to the network device so that the network device can understand the network situation and make more appropriate subsequent schedules. In some scenarios, the terminal device moves at high / medium speed, so that the reported CSI feedback may not be available (i.e., out of date) for future channels.

[0004] Specifically, in the case of downlink multi-antenna transmission, the terminal device can measure a CSI-reference signal (CSI-RS) transmitted from the network device and report a recommended precoder matrix, or an indication of the recommended precoder matrix, and / or a channel quality indicator (CQI) to the network device in a CSI report. The network device can then use the recommended precoder matrix when transmitting data to the terminal device. However, under non-ideal conditions, the preferred precoder matrix and / or CQI are time-sensitive, and the recommended precoder matrix and / or CQI may no longer be applicable when the network device schedules downlink data transmission to the terminal device after a certain period of time. Therefore, it is desirable to provide a solution that supports CSI reporting in scenarios where the terminal device moves at high / medium speeds. Summary of the Invention

[0005] Embodiments of the present disclosure generally provide a method, an apparatus, and a computer storage medium for configuring and transmitting CSI feedback.

[0006] In a first aspect, a communication method performed by a terminal device is provided, the method including: receiving, in the terminal device, at least one configuration for CSI feedback from a network device; and transmitting, to the network device based on the at least one configuration, CSI feedback including a plurality of partitions having different omission priorities, the plurality of partitions including parameters associated with a plurality of first vectors, a plurality of second vectors, and a plurality of third vectors.

[0007] In a second aspect, a communication method performed by a network device is provided, the method including: transmitting, in the network device, at least one configuration for CSI feedback to a terminal device; and receiving, from the terminal device based on the at least one configuration, CSI feedback including a plurality of partitions having different omission priorities, the plurality of partitions including parameters associated with a plurality of first vectors, a plurality of second vectors, and a plurality of third vectors.

[0008] In a third aspect, there is provided a terminal device comprising: a processing unit; and a memory, coupled to the processing unit, having instructions stored thereon, the instructions, when executed by the processing unit, causing the device to perform the method of the first aspect.

[0009] In a fourth aspect, there is provided a network device comprising: a processing unit; and a memory, coupled to the processing unit, having instructions stored thereon, the instructions, when executed by the processing unit, causing the device to perform the method of the second aspect.

[0010] In a fifth aspect, there is provided a computer-readable medium having stored thereon instructions that, when executed on at least one processor, cause the at least one processor to perform a method according to any of the first and second aspects above.

[0011] Other features of the present disclosure will become readily apparent from the following description. [Brief explanation of the drawings]

[0012] The above and other objects, features and advantages of the present disclosure will become more apparent from a more detailed description of some exemplary embodiments of the present disclosure in the accompanying drawings.

[0013] [Figure 1] 1 illustrates an exemplary block diagram of a CSI report according to a conventional solution. [Figure 2]1 illustrates an exemplary communication environment in which exemplary embodiments of the present disclosure may be implemented. [Figure 3] 1 shows a signaling chart illustrating a process of communication according to some embodiments of the present disclosure. [Figure 4A] Schematic diagrams of spatial domain, frequency domain and Doppler / time domain based are shown. [Figure 4B] 1 shows another schematic diagram based on the spatial domain, frequency domain, and Doppler / time domain. [Figure 4C] 10 shows yet another schematic diagram based on spatial domain, frequency domain, and Doppler / time domain. [Figure 5A] 1 illustrates an example block diagram of CSI feedback according to some embodiments of the present disclosure. [Figure 5B] 1 illustrates an example block diagram of CSI feedback according to some embodiments of the present disclosure. [Figure 6] 1 illustrates an exemplary method performed by a terminal device according to some embodiments of the present disclosure. [Figure 7] 1 illustrates an exemplary method performed by a network device according to some embodiments of the present disclosure. [Figure 8] 1 shows a schematic block diagram of an apparatus suitable for implementing exemplary embodiments of the present disclosure.

[0014] Throughout the drawings, the same or similar reference numbers represent the same or similar elements. DETAILED DESCRIPTION OF THE INVENTION

[0015] The principles of the present disclosure will be described with reference to several embodiments. It should be understood that these embodiments are set forth for illustrative purposes only to aid those skilled in the art in understanding and practicing the present disclosure, and do not imply any limitations on the scope of the present disclosure. The present disclosure described herein can be embodied in various forms other than those described below.

[0016] In the following description and claims, unless defined otherwise, all technical and scientific terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0017] In this disclosure, the term "terminal device" refers to any device with wireless or wired communication capabilities. Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, cellular phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, Internet of Things (IoT) devices, Ultra-Reliable and Low Latency Communications (URLLC) devices, Any Internet of Things (IoE) devices, Machine Type Communications (MTC) devices, in-vehicle devices for V2X communications where X represents pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB), spacecraft or airborne vehicles in Non-Terrestrial Networks (NTN) including Satellites and High Altitude Platforms (HAPs) including Unmanned Aircraft Systems (UAS), and Extended Reality (XR) including different types of reality such as Augmented Reality (AR), Mixed Reality (MR), and Virtual Reality (VR). This includes, but is not limited to, Reality devices, unmanned aerial vehicles (UAVs), commonly known as drones, i.e., aircraft without a human pilot, devices on high-speed trains (HST), image capture devices such as digital cameras, sensors, gaming devices, music storage and playback devices, and internet appliances that enable wireless or wired internet access and browsing. A "terminal device" may also have "multicast / broadcast" capabilities and support public safety and mission-critical applications, V2X applications, transparent IPV4 / IPV6 multicast delivery, IPTV, smart TV, wireless services, over-the-air software delivery, group communications, and IoT applications. It may also incorporate one or more subscriber identity modules (SIMs), referred to as multi-SIM. The term "terminal device" may be used interchangeably with UE, mobile station, subscriber station, mobile terminal, user terminal, or wireless device.

[0018] The term "network device" refers to a device capable of providing or hosting a cell or coverage area over which terminal devices can communicate. Examples of network devices include, but are not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a next generation Node B (gNB), a transmit / receive point (TRP), a remote radio unit (RRU), a radio head (RH), a remote radio head (RRH), a low power node such as an IAB node, a femto node, a pico node, and a reconfigurable intelligent surface (RIS).

[0019] A terminal device or network device may have artificial intelligence (AI) or machine learning capabilities, which typically include models trained from a large amount of collected data for a specific function and can be used to predict some information.

[0020] The terminal device or network device may operate in multiple frequency ranges, such as FR1 (410 MHz to 7125 MHz), FR2 (24.25 GHz to 71 GHz), frequency bands greater than 100 GHz, and TERA Hertz (THZ). It can also operate in licensed, unlicensed, and shared spectrum. The terminal device may have multiple connections with network devices in Multi-Radio Dual Connectivity (MR-DC) application scenarios. The terminal device or network device can operate in full duplex, flexible duplex, and cross-division duplex modes.

[0021] Embodiments of the present disclosure may be implemented in test equipment, such as a signal generator, a signal analyzer, a spectrum analyzer, a network analyzer, a test terminal equipment, a test network equipment, or a channel emulator. In some embodiments, the terminal equipment may be connected to a first network device and a second network device. One of the first network device and the second network device may be a master node and the other may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs). In some embodiments, the first network device may be a first RAT device, and the second network device may be a second RAT device. In some embodiments, the first RAT device is an eNB, and the second RAT device is a gNB. Information related to the different RATs may be transmitted from at least one of the first network device and the second network device to the terminal device. In some embodiments, the first information may be transmitted from the first network device to the terminal device, and the second information may be transmitted from the second network device to the terminal device directly or via the first network device. In some embodiments, information related to the configuration of the terminal device configured by the second network device may be transmitted from the second network device via the first network device, and information related to the reconfiguration of the terminal device configured by the second network device may be transmitted to the terminal device directly from the second network device or via the first network device.

[0022] In this disclosure, the singular forms "a," "the," and "the" are intended to include the plural, unless the context clearly indicates otherwise. The term "comprises" and variations thereof are interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is interpreted as "based at least in part on." The terms "one embodiment" and "embodiment" are interpreted as "at least one embodiment." The term "another embodiment" is interpreted as "at least one other embodiment." Terms such as "first," "second," etc. may refer to different objects or the same object. The following content may include other definitions, both explicit and implicit.

[0023] In some instances, values, procedures, or devices are referred to as "optimal," "lowest," "highest," "minimum," "maximum," etc. It is understood that such descriptions are intended to indicate choices among multiple functional alternatives used, and that such choices are not necessarily better, smaller, higher, or more preferred than other choices.

[0024] As mentioned above, CSI feedback is important in wireless communication networks. For example, some discussions on CSI extension are expected to be further explored in 3GPP Release 18. CSI extensions for high / medium speed and coherent joint transmission (CJT) are expected to be specified, and the maximum number of CSI-RS ports per resource may be 32.

[0025] Furthermore, by leveraging time domain (TD) correlation and / or Doppler domain (DD) information to support downlink precoding, it is expected that CSI reporting extensions for high / medium speeds targeting frequency range 1 (FR1) will be defined as follows: > It is an improvement of the Release 16 / 17 Type II codebook without changing the spatial domain (SD) and frequency domain (FD) bases, > UE reporting of TD channel properties (TDCP) measured via CSI reference signals (RS) for tracking purposes.

[0026] Furthermore, assuming ideal backhaul and synchronization, and the same number of antenna ports between TRPs, it is expected that the extension of CSI acquisition for CJT targeting FR1 and up to four TRPs will be specified as follows: > An improvement of the Release 16 / 17 Type II codebook for CJT multi-TRP and associated CSI reporting targeting FDD, taking into account the throughput vs. overhead trade-off, > An SRS extension to manage inter-TRP cross-SRS interference targeting Time Division Duplex (TDD) CJT via SRS capacity extension and / or interference randomization, subject to the following constraints: 1) no additional resources are consumed for the Sounding Reference Signal (SRS); 2) the existing SRS comb structure is reused; and 3) there are no new SRS root sequences.

[0027] FIG. 1 shows an example block of a CSI report 100. As shown in FIG. 1, the CSI report is divided into two parts, namely, part 1 and part 2, and part 2 is further divided into three groups, namely, group 0 to group 2. The CSI report may also include a PMI field X1 and a PMI field X2. For example, the PMI field X1 may be included in CSI group 0. As another example, the PMI field X2 may be included in CSI group 1 and CSI group 2. As yet another example, a subset of the PMI field X2 may be included in CSI group 1, and the remainder of the PMI field X2 may be included in CSI group 2.

[0028] Table 1 below shows an example of the mapping order of the CSI fields for one CSI report, CSI Part 1. Table 1 Example of mapping order of CSI fields for one CSI report, CSI Part 1 TIFF2025528077000002.tif83168

[0029] Table 2 below shows examples of RI and CQI (defined by the information element codebookType=typeII-r16 or typeII-PortSelection-r16). Table 2. Examples of RI and CQI TIFF2025528077000003.tif103168

[0030] Additionally, the values ​​of the Rank Indicator (RI) field are mapped to permitted Rank Indicator values ​​in ascending order, where "0" maps to the lowest permitted Rank Indicator value. NZ The field values ​​are sorted in ascending order according to TS38.214 clauses 5.2.2.2.5 and 5.2.2.2.6. NZ where "0" is the K NZ =1.

[0031] In some embodiments, a parameter for the number of permission rank indicator values ​​(e.g., n RI ) may be set by the network device.

[0032] In some embodiments, v may be the number of layers or the value of a rank indicator field. For example, the number of layers or the value of a rank indicator field may be reported from the terminal device to the network device.

[0033] Table 3 below shows an example of RI and CQI (defined in the information element codebookType=typeII-PortSelection-r17). Table 3 shows examples of RI and CQI TIFF2025528077000004.tif81166

[0034] The values ​​of the Rank Indicator (RI) field are mapped to permitted Rank Indicator values ​​in ascending order, where "0" maps to the lowest permitted Rank Indicator value. NZ The field values ​​are sorted in ascending order according to TS38.214, section 5.2.2.2.7. NZ where "0" is the K NZ =1.

[0035] In some embodiments, the terminal device receives from the network device at least one configuration for CSI feedback, where the at least one configuration includes: Multiple CSI-RS resources, Multiple antenna ports for one CSI-RS resource; At least one parameter for antenna port configuration, a configuration for codebook type, Settings for report types, at least one parameter for the codebook; The number of physical resource blocks (PRBs) in the bandwidth part (BWP), the number of first subbands; The size of one first subband, The number of PRBs in one first subband; the number of second subbands (e.g., represented as N3); The size of one second subband, The number of PRBs in one second subband; the number of multiple time units (e.g., represented as N4), The size of one time unit (e.g., T u or T i ), The number of slots / subslots / symbols in one time unit (e.g., represented as Tu or Ti), the number of second vectors (e.g., denoted as L); The number of first vectors (e.g., M v ), The number of multiple third vectors (e.g., M d ), A first parameter for the codebook (e.g., denoted as R), The second parameter for the codebook (e.g., p v ), a third parameter for the codebook (e.g., denoted as β), A fourth parameter for the codebook (e.g., R d ), A fifth parameter for the codebook (e.g., p v,d ), A sixth parameter for the codebook (e.g., β d ), and A seventh parameter for the codebook (e.g., denoted as M), may include at least one of:

[0036] In some embodiments, the number of the multiple CSI-RS resources may be a positive integer. For example, the number of the multiple CSI-RS resources may be greater than or equal to 1 and less than or equal to 64. In some embodiments, the number of the multiple antenna ports for one CSI-RS resource may be a positive integer. For example, the number of the multiple antenna ports for one CSI-RS resource may be one of {1, 2, 4, 8, 12, 16, 24, 32}.

[0037] In some embodiments, the terminal device may transmit the number of layers and at least one codebook indicator to the network device based on at least one configuration for CSI feedback. one or more indicators for the plurality of first vectors; one or more indicators for a plurality of second vectors; one or more indicators for a plurality of third vectors; a field for a plurality of first amplitude coefficients corresponding to one layer having an index; a field for a plurality of second amplitude coefficients corresponding to one layer having an index; a field for a plurality of third amplitude coefficients corresponding to one layer having an index; a field for a plurality of first phase coefficients corresponding to one layer having an index; a field for a plurality of second phase coefficients corresponding to one layer having an index; a field for a plurality of third phase coefficients corresponding to one layer having an index; a bitmap for indicating non-zero coefficients corresponding to one layer having an index; and Indicator of the strongest coefficient corresponding to one layer with index, may include at least one of:

[0038] In some embodiments, the bitmap for indicating non-zero coefficients may indicate which coefficients in a field for a plurality of first / second / third amplitude coefficients are non-zero or reported. In some embodiments, the bitmap for indicating non-zero coefficients may indicate which coefficients in a field for a plurality of first / second / third phase coefficients are non-zero or reported.

[0039] Table 4 below shows an example mapping order of the CSI fields (defined by the information element codebookType=typeII-r16 or typeII-PortSelection-r16) of one CSI report, which is CSI Part 2. Table 4 Example of mapping order of CSI fields for one CSI report, CSI Part 2 TIFF2025528077000005.tif175168

[0040] Table 5 below shows an example mapping order of the CSI fields (defined by the information element codebookType=typeII-PortSelection-r17) of one CSI report, which is CSI Part 2. Table 5. Another example of the mapping order of CSI fields for one CSI report, CSI Part 2 TIFF2025528077000006.tif177168

[0041] As mentioned above, in some scenarios, a terminal device may move at high / medium speed, and the reported CSI feedback may not be available for future channel prediction. To achieve better future channel prediction for terminal devices with high / medium speed, time domain (TD) / Doppler domain (DD) information is introduced. By reporting TD / DD information, a network device can predict future channel prediction even when the terminal device moves at high / medium speed. However, the CSI reporting defined in Release 16 and Release 17 does not support reporting TD / DD information.

[0042] In some embodiments, the at least one codebook indicator may include at least one of one or more fields for the plurality of first vectors, one or more fields for the plurality of second vectors, and one or more fields for the plurality of third vectors. In some embodiments, one field for the plurality of first vectors may correspond to one indicator for the plurality of first vectors. In some embodiments, one field for the plurality of second vectors may correspond to one indicator for the plurality of second vectors. In some embodiments, one field for the plurality of third vectors may correspond to one indicator for the plurality of third vectors.

[0043] In some embodiments, one or more fields for the plurality of first vectors may each correspond to a layer having an index. In some embodiments, one or more fields for the plurality of second vectors may each correspond to a layer having an index. In some embodiments, one or more fields for the plurality of third vectors may each correspond to a layer having an index.

[0044] In some embodiments, one or more fields for the plurality of first vectors may correspond to each layer of a certain number of layers. For example, one or more fields for the plurality of first vectors may be the same for each layer of a certain number of layers. In some embodiments, one or more fields for the plurality of second vectors may correspond to each layer of a certain number of layers. For example, one or more fields for the plurality of second vectors may be the same for each layer of a certain number of layers. In some embodiments, one or more fields for the plurality of third vectors may correspond to each layer of a certain number of layers. For example, one or more fields for the plurality of third vectors may be the same for each layer of a certain number of layers.

[0045] In some embodiments, multiple precoding matrices or multiple codebooks corresponding to the N3 subbands and / or N4 time units may be determined based on at least one codebook indicator.

[0046] In some embodiments, the terminal device may be configured to have a number of PRBs for a Bandwidth Part (BWP), or a size for the BWP. In some embodiments, the number of PRBs for the BWP (e.g., N BWP size ) can be a positive integer. For example, N BWP can be a positive integer, e.g., 24≦N BWP size ≦275.

[0047] In some embodiments, the terminal device may determine the start position of the BWP (e.g., N BWP start For example, N BWP start can be a non-negative integer, e.g., 0≦N BWP start ≦275.

[0048] In some embodiments, the starting position of the BWP and the number of PRBs for the BWP may be configured in one upper layer parameter.

[0049] In some embodiments, the first subband may correspond to a subband for CQI or a CQI subband or a CSI subband. In one exemplary embodiment, the first subband corresponds to one time unit.

[0050] In some embodiments, the size of one first subband or the number of PRBs in one first subband is N PRB SB and N PRBSB is a positive integer. For example, 1≦N PRB SB ≦32. For example, N PRB SB may be one of {4,8,16,32}.

[0051] In some embodiments, N PRB SB is N BWP In some embodiments, 24≦N BWP If ≦72, N PRB SB may be 4 or 8. For example, N PRB SB may be set to 4 or 8 based on one higher layer parameter for the subband. In some embodiments, 73≦N BWP If ≦144, N PRB SB may be 8 or 16. For example, N PRB SB may be set to 8 or 16 based on higher layer parameters for the subband. In some embodiments, 145≦N BWP If ≦275, N PRB SB may be 16 or 32. For example, N PRB SB may be set to 16 or 32 based on higher layer parameters for the subband.

[0052] In some embodiments, the at least one parameter for the antenna port configuration is: the number of multiple CSI-RS resources; the number of antenna ports for one CSI-RS resource; a first plurality of antenna port groups; a number of antenna port groups in the first plurality; the number of antenna ports in one antenna port group, and a first parameter of antenna port configuration and a second parameter of antenna port configuration; may include at least one of:

[0053] In some embodiments, one antenna port group may correspond to a TRP or an antenna port of a TRP. In some embodiments, one antenna port group may correspond to one CSI-RS resource. In some embodiments, the number of antenna ports may be the same for each CSI-RS resource within the multiple CSI-RS resources.

[0054] In some embodiments, at least one configuration may include multiple antenna ports in an antenna port group or multiple antenna ports for one CSI-RS resource. In some embodiments, the number of multiple antenna ports in an antenna port group or the number of multiple antenna ports for one CSI-RS resource (e.g., denoted as P) may be one of {1, 2, 4, 6, 8, 12, 16, 24, 32}. In some embodiments, the number of antenna ports in each antenna port group or the number of antenna ports for each CSI-RS resource in the multiple CSI-RS resources may be the same. For example, P may be a positive integer. For example, P may be one of {1, 2, 4, 6, 8, 12, 16, 24, 32}.

[0055] In some embodiments, the terminal device may receive at least one of the multiple CSI-RS resources based on the number of antenna ports for the at least one CSI-RS resource.

[0056] In some embodiments, the value of the first parameter of the antenna port configuration may be represented as N1. For example, N1 may be a positive integer. For example, N1 may be one of {2, 3, 4, 6, 8, 12, 16}. In some embodiments, the value of the second parameter of the antenna port configuration may be represented as N2. For example, N2 may be a positive integer. For example, N2 may be one of {1, 2, 3, 4}. In some embodiments, the first parameter of the antenna port configuration and the second parameter of the antenna port configuration may be configured in one higher layer parameter.

[0057] In some embodiments, the number of antenna ports in an antenna port group or the number of antenna ports for one CSI-RS resource may be determined based on a first parameter of the antenna port configuration and a second parameter of the antenna port configuration. In some embodiments, the number of antenna ports in an antenna port group or the number of antenna ports for one CSI-RS resource may be P=N1·N2·2.

[0058] In some embodiments, a parameter "O1" may be present, and "O1" may represent a first Discrete Fourier Transform (DFT) oversampling in a first dimension. For example, "O1" may be one of {1, 2, 4}. In another example, "O1" may be 2 or 4. In some embodiments, a parameter "O2" may be present, and "O2" may represent a second DFT oversampling in a second dimension. For example, "O2" may be one of {1, 2, 4}. In another example, "O2" may be 2 or 4.

[0059] In some embodiments, one setting of (N1, N2) may correspond to one setting of (O1, O2). In some embodiments, one setting of (O1, O2) may correspond to one setting of (N1, N2).

[0060] In some embodiments, exemplary settings of (N1, N2) and (O1, O2) and / or P may be at least one of the rows and / or columns of Table 6 below. Table 6. Example Settings TIFF2025528077000007.tif80156

[0061] In some embodiments, the vector u m In some embodiments, u m may be a DFT vector. In some embodiments, if N2>1, then TIFF2025528077000008.tif1798. In some embodiments, when N2=2, TIFF2025528077000009.tif1752. In some embodiments, the vector u m may have a length of N2. In some embodiments, the vector u m The size of u may be (N2)*1 1*(N2). In some embodiments, when N2=1, u m = 1. In some embodiments, m is the vector u m In some embodiments, m may be a non-negative integer, e.g., 0≦m≦02N2−1.

[0062] In some embodiments, the vector v l,m In some embodiments, TIFF2025528077000010.tif18138. In some embodiments, l is a vector v l,m In some embodiments, the vector v l,m The length of the vector v may be N1*N2 or P / 2. l,mThe size of may be (N1*N2)*1 or (P / 2)*1 or 1*(N1*N2) or 1*(P / 2).

[0063] In some embodiments, when N1=2 and N2=2, TIFF2025528077000011.tif20141. In some embodiments, when N1=4 and N2=1, TIFF2025528077000012.tif1799. In some embodiments, l may be a non-negative integer. For example, 0≦l≦01N1−1. In some embodiments, [ ] T may represent the transpose of a vector or matrix.

[0064] In some embodiments, the terminal device may determine or report to the network device the number of layers and at least one codebook indicator based on at least one setting. ri , r ... ri For example, r is the set of {1,2,...v ri} or {1,2} or {1,2,3,4} or {1,2,3,4,5,6,7,8}.

[0065] In some embodiments, the at least one codebook indicator is: one or more indicators (or fields) for the plurality of first vectors; one or more indicators (or one or more fields) for the plurality of second vectors, one or more indicators (or fields) for the first plurality of rotations about the plurality of second vectors; one or more indicators (or fields) for the plurality of third vectors, one or more indicators (or fields) for the second plurality of rotations about the plurality of third vectors, one or more indicators (or fields) for the strongest coefficients, one or more indicators (or fields) for a plurality of first amplitude coefficients; one or more indicators (or one or more fields) for a plurality of second amplitude coefficients; a first number of non-zero coefficients, one or more indicators (or one or more fields) for a plurality of phase coefficients, and one or more indicators (or one or more bitmaps) of non-zero coefficients; may include at least one of:

[0066] In some embodiments, the one or more indicators (or one or more bitmaps) for indicating a non-zero coefficient may indicate an index of a second amplitude coefficient and / or an index of a phase coefficient, and the value of the second amplitude coefficient corresponding to the index and / or the value of the phase coefficient corresponding to the index may be non-zero.

[0067] Alternatively, in some embodiments, the one or more indicators (or one or more bitmaps) for indicating non-zero coefficients may indicate which coefficients in the one or more instructions or in the field of the second amplitude coefficients are non-zero or are being reported.

[0068] Alternatively, in some embodiments, one or more indicators (or one or more bitmaps) for indicating non-zero coefficients may indicate which coefficients in one or more instructions or in multiple phase coefficient fields are non-zero or are being reported.

[0069] In some embodiments, one or more of the at least one codebook indicator or field may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., be layer-common. In some embodiments, each of the one or more of the at least one codebook indicator or field may correspond to one layer having an index, e.g., be layer-specific.

[0070] In some embodiments, one or more indicators (or one or more fields) for the plurality of first vectors may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., be layer-common. In some embodiments, one or more indicators (or fields) for the plurality of first vectors may correspond to a layer with an index, e.g., be layer-specific.

[0071] In some embodiments, one or more indicators (or one or more fields) for the second vectors may be the same for each of a certain number of layers or may apply to each of a certain number of layers, e.g., be layer-common. In some embodiments, one or more indicators (or one or more fields) for the second vectors may correspond to a layer with an index, e.g., be layer-specific.

[0072] In some embodiments, the one or more indicators (or one or more fields) for the first plurality of rotations for the plurality of second vectors may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., be layer-common. In some embodiments, the one or more indicators (or fields) for the first plurality of rotations for the plurality of second vectors may correspond to a layer with an index, e.g., be layer-specific.

[0073] In some embodiments, the one or more indicators (or one or more fields) for the second plurality of rotations for the plurality of third vectors may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., be layer-common. In some embodiments, the one or more indicators (or one or more fields) for the second plurality of rotations for the plurality of third vectors may correspond to a layer with an index, e.g., be layer-specific.

[0074] In some embodiments, one or more indicators (or one or more fields) for the multiple third vectors may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., layer-common. In some embodiments, one or more indicators (or one or more fields) for the multiple third vectors may correspond to a layer with an index, e.g., layer-specific.

[0075] In some embodiments, the indicator (or field) for the strongest coefficient may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., layer-common. In some embodiments, the indicator (or field) for the strongest coefficient may correspond to one layer with an index, e.g., layer-specific.

[0076] In some embodiments, the one or more indicators (or one or more fields) for the plurality of first amplitude coefficients may be the same for each of a certain number of layers or may apply to each of a certain number of layers, e.g., be layer-common. In some embodiments, the one or more indicators (or one or more fields) for the plurality of first amplitude coefficients may correspond to a layer having an index, e.g., be layer-specific.

[0077] In some embodiments, the indicator(s) (or the field(s)) for the phase coefficients may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., layer-common. In some embodiments, the indicator(s) (or the field(s)) for the phase coefficients may correspond to a layer with an index, e.g., layer-specific.

[0078] In some embodiments, the one or more indicators (or one or more fields) for the second amplitude coefficients may be the same for each of a certain number of layers or may apply to each of a certain number of layers, e.g., be layer-common. In some embodiments, the one or more indicators (or one or more fields) for the second amplitude coefficients may correspond to a layer having an index, e.g., be layer-specific.

[0079] In some embodiments, the one or more indicators (or one or more fields) for indicating non-zero coefficients may be the same for each of a certain number of layers or may apply to each of a certain number of layers, e.g., be layer-common. In some embodiments, the one or more indicators (or fields) for indicating non-zero coefficients may correspond to a layer with an index, e.g., be layer-specific.

[0080] In some embodiments, the first number of non-zero coefficients may be the same for each layer of a certain number of layers or may apply to each layer of a certain number of layers, e.g., be layer-common. In some embodiments, the first number of non-zero coefficients may correspond to a layer with an index, e.g., be layer-specific.

[0081] In some embodiments, the number of the plurality of second vectors, the second parameter for the codebook, and the third parameter for the codebook may be set or indicated in one upper layer parameter, and in some embodiments, the fifth parameter for the codebook and the sixth parameter for the codebook may be set or indicated in one upper layer parameter.

[0082] In some embodiments, the second parameter for the codebook may be one of {½, ¼, ⅛}. In some embodiments, the third parameter for the codebook may be one of {¼, ½, ¾}. In some embodiments, the number of the plurality of second vectors (e.g., represented as L) may be one of {2, 4, 6}, or at least one of {2, 4, 6, 8}, or {2, 4, 6, 8, 12, 16, 24, 32}. In some embodiments, L may be a positive integer. In some embodiments, L may be one of {2, 4, 6}, or one of {2, 4, 6, 8}, or one of {2, 4, 6, 8, 12, 16, 24, 32}.

[0083] In some embodiments, a third parameter for the codebook may be further based on the number of layers. In some embodiments, one upper layer parameter indicates L=2 and β=1 / 4, and if the number of layers is 1 or 2, p v = 1 / 4, and the number of layers is 3 or 4, p v =1 / 8.

[0084] Alternatively, in some embodiments, one upper layer parameter indicates L=2 and β=½, and when the number of layers is 1 or 2, p v = 1 / 4, and the number of layers is 3 or 4, p v =1 / 8.

[0085] Alternatively, in some embodiments, one upper layer parameter indicates L=4 and β=1 / 4, and when the number of layers is 1 or 2, p v = 1 / 4, and the number of layers is 3 or 4, p v =1 / 8.

[0086] Alternatively, in some embodiments, one upper layer parameter indicates L=4 and β=½, and when the number of layers is 1 or 2, p v = 1 / 4, and the number of layers is 3 or 4, p v =1 / 8.

[0087] Alternatively, in some embodiments, one upper layer parameter is L=4, β=3 / 4, and p v =1 / 4 may also be shown.

[0088] Alternatively, in some embodiments, one upper layer parameter indicates L=4 and β=½, and when the number of layers is 1 or 2, p v = 1 / 2 and the number of layers is 3 or 4, p v =1 / 4.

[0089] Alternatively, in some embodiments, one upper layer parameter is L=6, β=½, and p v For example, the number of layers may be 1 or 2. In some embodiments, one upper layer parameter may be L=6, β=3 / 4, and p v = 1 / 4. For example, the number of layers is 1 or 2.

[0090] In some embodiments, the first parameter for the codebook (e.g., represented as R) may be a positive integer. For example, R may be a positive integer. For example, R may be one of {1, 2}. In some embodiments, the number of precoding matrices may be determined based on the first parameter for the codebook and the number of first subbands. In some embodiments, the first parameter for the codebook may control the total number of precoding matrices indicated by the PMI as a function of the configured number of first subbands or the number of first subbands, the size of one first subband, and the number of PRBs for the BWP.

[0091] In some embodiments, the second subband may correspond to a subband for a precoding matrix indicator (PMI) or a PMI subband.

[0092] In some embodiments, the size of one second subband or the number of PRBs in one second subband is N PMI may be expressed as N PMI is a positive integer. For example, 1≦N PMI ≦32. For example, N PMI may be one of {2, 4, 8, 16, 32}. In some embodiments, N PMI is N PRB SB and R. For example, N PMI =N PRB SB / R.

[0093] TIFF2025528077000013.tif32168

[0094] In some embodiments, when R=1, one precoding matrix may be indicated for each first subband. In some embodiments, when R=2, for a first subband that is not the first / leading first subband or the last / trailing first subband of the plurality of first subbands in the BWP, two precoding matrices may be indicated for one of the plurality of first subbands. For example, the first precoding matrix may be the first Nth precoding matrix of one of the plurality of first subbands. PRB SB / 2 PRBs, and the second precoding matrix corresponds to the last N PRBs of one of the first subbands PRB SB / corresponds to 2 PRBs.

[0095] In some embodiments, when R=2, for one first subband that is the first / leading first subband or the last / trailing first subband among the plurality of first subbands in the BWP, TIFF2025528077000014.tif1484, one precoding matrix corresponding to the first / leading first subband among multiple first subbands may be indicated.

[0096] In some embodiments, when R=2, for one first subband that is the first / leading first subband or the last / trailing first subband among the plurality of first subbands in the BWP, In the case of TIFF2025528077000015.tif1484, two precoding matrices corresponding to the first / leading first subband of the plurality of first subbands may be indicated. For example, the first precoding matrix may be the first precoding matrix of the first / leading first subband of the plurality of first subbands. TIFF2025528077000016.tif1483 PRBs, and the second precoding matrix may correspond to the first / leading first subband of the plurality of first subbands. TIFF2025528077000017.tif corresponds to 1514 PRBs. In some embodiments, when R=2, for one first subband that is the first / leading first subband or the last / trailing first subband among the plurality of first subbands in the BWP, TIFF2025528077000018.tif17165, one precoding matrix corresponding to the last / tail first subband among the multiple first subbands may be indicated.

[0097] In some embodiments, when R=2, for a first subband that is the first / leading first subband or the last / trailing first subband of the plurality of first subbands, In the case of TIFF2025528077000019.tif18166, two precoding matrices corresponding to the last / tail first subband of the plurality of first subbands may be indicated. For example, the first precoding matrix may be the first precoding matrix corresponding to the last / tail first subband of the plurality of first subbands. TIFF2025528077000020.tif may correspond to 1514 PRBs, and the second precoding matrix may correspond to the last / tail of the first subbands of the first subbands. TIFF2025528077000021.tif may support 15144 PRBs.

[0098] In some embodiments, the number M of the plurality of first vectors υ may be a positive integer, for example, TIFF2025528077000022.tif1340. For example, M υ may be one of {1,2,3,4,5,6,7,8,9,10}.

[0099] In some embodiments, nchoosek may be a function that selects k values ​​from n values. In some embodiments, nchoosek(a,b)=a! / (b!*(ab)!). In some embodiments, "!" may be a factorial. In some embodiments, a!=1*2*...*(a-1)*a.

[0100] In some embodiments, at least one codebook indicator may be included in the PMI or the CSI. In some embodiments, the PMI or the CSI may include a first portion of the PMI (or CSI) and a second portion of the PMI (or CSI). For example, the size of the second portion of the PMI (or CSI) may be based on the first portion of the PMI (or CSI). In some embodiments, the PMI (or CSI) may include a first portion of the PMI (or CSI), a second portion of the PMI (or CSI), and a third portion of the PMI (or CSI). For example, the size of the second portion of the PMI (or CSI) may be based on the first portion of the PMI (or CSI). As another example, the size of the third portion of the PMI (or CSI) may be based on at least one of the first portion of the PMI (or CSI) and the second portion of the PMI (or CSI).

[0101] In some embodiments, the length of one second vector may be based on the number of antenna ports in one antenna port group or the number of antenna ports for one CSI-RS resource. In some embodiments, the length of one second vector may be the number of antenna ports in one antenna port group or the number of antenna ports for one CSI-RS resource divided by two. In some embodiments, the length of one second vector may be P / 2. For example, P may be one of {4, 8, 12, 16, 24, 32}.

[0102] In some embodiments, the number of indicators (or fields) for the strongest coefficients may be based on the number of layers, with each indicator (or field) for the strongest coefficient corresponding to a layer with an index.

[0103] In some embodiments, the indicator (or field) for the strongest coefficient corresponds to the layer having the index, or the bit size (or bit width) of the indicator (or field) for the strongest coefficient corresponds to the layer having the index and may be based on at least one of the value 2, the first number of non-zero coefficients corresponding to one layer having the index, and the number of the plurality of second vectors.

[0104] In some embodiments, the bit size of the indicator (or field) for the strongest coefficient corresponds to the layer having the index and may be based on at least one of: a first number of non-zero coefficients corresponding to a layer having the index; and a multiplication of two by the number of the plurality of second vectors.

[0105] In some embodiments, the indicator (or field) for the strongest coefficient corresponds to the layer having the index and may be included in the PMI (or CSI), or a first part of the PMI (or CSI), or a second part of the PMI (or CSI).

[0106] In some embodiments, K b2 may be the bit size for each of the phase coefficients. For example, K b2 may be 2 or 3 or 4 bits.

[0107] In some embodiments, the one or more indicators (or one or more bitmaps) for indicating non-zero coefficients may indicate indices of second amplitude coefficients and / or indices of phase coefficients. In some embodiments, each bit or code point of the indicator (or bitmap) may indicate whether a second amplitude coefficient and / or a phase coefficient corresponding to a layer having an index, a second vector (or beam) having an index, a first vector having an index, and a third vector having an index is reported (or has a value of 0).

[0108] In some embodiments, the value of each bit is either 0 or 1. For example, 0 may indicate that the second amplitude coefficient and / or phase coefficient corresponding to the layer having index, corresponding to the second vector (or beam) having index, corresponding to the first vector having index, and corresponding to the third vector having index are not reported (or have a value of 0). For example, 1 may indicate that the second amplitude coefficient and / or phase coefficient corresponding to the layer having index, corresponding to the second vector (or beam) having index, corresponding to the first vector having index, and corresponding to the third vector having index are reported (or have a value other than 0).

[0109] In some embodiments, the number of indicators (or bitmaps) for indicating non-zero coefficients may be the same as the number of layers. For example, each indicator (or bitmap) for indicating non-zero coefficients may correspond to one layer having an index.

[0110] In some embodiments, the size of the indicator (or bitmap) for indicating non-zero coefficients corresponding to a layer having an index may be based on the number of the plurality of first vectors corresponding to the layer having the index, the number of the plurality of second vectors corresponding to the layer having the index, and the number of the plurality of third vectors corresponding to the layer having the index.

[0111] In some embodiments, the number of the plurality of first vectors may be determined based on at least one of the number of layers, the size of one first subband, the first parameter for the codebook, the size of one second subband, the third parameter for the codebook, and the second parameter for the codebook.

[0112] In some embodiments, the number of one or more indicators (or one or more bitmaps) for indicating non-zero coefficients may be based on the number of layers, and in some embodiments, each of the one or more indicators (or one or more bitmaps) for indicating non-zero coefficients may correspond to a layer having an index.

[0113] In some embodiments, the number of one or more indicators (or one or more fields) for the plurality of second amplitude coefficients corresponding to the layer having the index may be based on at least one of the first number of non-zero coefficients, the number of indicators in the indicator (or bitmap) for indicating the non-zero coefficients corresponding to the layer having the index, or the number of values ​​(or bits or code points) having the value “1”.

[0114] In some embodiments, the number of one or more indicators (or one or more fields) for the plurality of phase coefficients corresponding to the layer having the index may be based on at least one of the first number of non-zero coefficients, the number of indicators in the indicator (or bitmap) for indicating the non-zero coefficients corresponding to the layer having the index, or the number of values ​​(or bits or code points) having the value “1”.

[0115] In some embodiments, the number M of the plurality of first vectors υ may be determined based on at least one of the number of PRBs for the BWP, the number of layers, the size of a first subband, the number of the plurality of first subbands, a first parameter for the codebook, the size of a second subband, the number of the plurality of second subbands, and a second parameter for the codebook. In some embodiments, the second parameter for the codebook may be determined based on the number of layers.

[0116] In some embodiments, the size or length of the one first vector may be determined based on at least one of the number of PRBs for the BWP, the number of layers, the size of one first subband, the number of the plurality of first subbands, the first parameter for the codebook, the size of one second subband, the number of the plurality of second subbands, and the second parameter for the codebook. In some embodiments, the size or length of the one first vector may be N3.

[0117] In some embodiments, the number M of the plurality of third vectors d may be determined based on at least one of the number of time units, the number of layers, the size of one time unit, the number of slots / subslots / symbols for one time unit, the time interval between two time units, a fourth parameter for the codebook, a fifth parameter for the codebook, and a sixth parameter for the codebook.

[0118] In some embodiments, the number M of the plurality of third vectors d may be set by the network device 210. In some embodiments, the number M of the plurality of third vectors d may be reported by terminal device 220.

[0119] In some embodiments, the number M of the plurality of fourth vectors d can be a positive integer, for example, TIFF2025528077000023.tif1342 For example, M d may be one of {1,2,3,4,5,6,7,8,9,10}.

[0120] In some embodiments, the size or length of the one third vector may be determined based on at least one of the number of time units, the number of layers, the size of one time unit, the number of slots / subslots / symbols for one time unit, the time interval between two time units, the fourth parameter for the codebook, the fifth parameter for the codebook, and the sixth parameter for the codebook. In some embodiments, the size or length of the one third vector may be N4.

[0121] In some embodiments, a fourth parameter R for the codebook d may be one of {1 / 8, 1 / 4, 1 / 2, 1, 2}.

[0122] In some embodiments, the size or length of one third vector may be a positive integer, for example, 1≦N4≦256.

[0123] In some embodiments, the terminal device may receive at least one CSI-RS, where the number of antenna ports for the at least one CSI-RS may be determined based on at least one parameter for antenna port configuration.

[0124] In some embodiments, the second vector may be a vector in the spatial domain. In some embodiments, the second vector may be v l,mIn some embodiments, the second vector may be a frequency domain vector. In some embodiments, the second vector may be a DFT vector. In some embodiments, the third vector may be a Doppler domain or a time domain vector. In some embodiments, the third vector may be a DFT vector, or a Discrete Cosine Transformation (DCT) vector, or a Slepian vector, or an oversampled / rotated DFT vector, or a vector having only one element with value 1 and other elements with value 0, or an identity vector.

[0125] In some embodiments, the number of precoding matrices or codebooks corresponding to the N3 subbands and / or N4 time units is L+M υ vectors or L+M υ +M d may be determined from the vectors.

[0126] In some embodiments, the length of one second vector may be based on the number of antenna ports in one CSI-RS resource divided by two.

[0127] In some embodiments, the length of one first vector may be determined based on a first parameter for the codebook and the number of first subbands. In some embodiments, the number of the plurality of first vectors may be determined based on a third parameter for the codebook, the number of second subbands, and the first parameter for the codebook. In some embodiments, the number of second subbands may be based on the first parameter for the codebook and the number of first subbands. In some embodiments, the second size of one second subband may be determined based on the first parameter for the codebook and the first size of one first subband.

[0128] An embodiment of the present disclosure provides a solution for configuring and transmitting CSI feedback. In this solution, the CSI feedback includes multiple partitions with different omission priorities, and parameters reported by the CSI feedback are associated with multiple first vectors, multiple second vectors, and multiple third vectors. By associating the parameters with the three types of vectors, TD / DD information may be reported along with spatial domain (SD) information and frequency domain (FD) information. Furthermore, these parameters are included in different partitions with different omission priorities, which ensures that the network device can at least predict future channel forecasts for at least one beam so that communication between the network device and the terminal device is not interrupted.

[0129] For ease of discussion, some terms used in the following description are listed below. Omission priority: Priority for controlling discarding or omission. Specifically, different partitions / information groups in the CSI feedback may be configured to have / associated with different omission priorities. For example, when transmission resources are scarce or the coding rate of the transmission is above a threshold, the partition(s) / information group(s) (including associated parameters) with lower omission priority level(s) are discarded or omitted first. The first vector refers to a specific vector that may be FD-based, SD-based, or DD / TD-based. Furthermore, the first vector may correspond to the strongest coefficient, the strongest amplitude coefficient, or the maximum power. · Primary 1st vector points to the 1st FD base. · First set of FD bases: refers to the set of FD bases that includes the first FD base. · Second set of FD-based: Refers to a set of FD-based that is different from the first set of FD-based. · FD-based subset: refers to a subset of FD-based excluding the first FD-based. The primary first vector points to the first SD base. · First set of SD bases: Refers to the set of SD bases that includes the first SD base. · SD-based second set: refers to a SD-based set that is different from the SD-based first set. ·SD-based subset: refers to a subset of the SD-based excluding the first SD-based. The primary first vector points to the first DD / TD base. First set of DD / TD bases: refers to the set of DD / TD bases that includes the first DD / TD base. · DD / TD-based second set: Refers to a DD / TD-based set that is different from the DD / TD-based first set. · Subset of DD / TD base: Refers to a subset of DD / TD base excluding the first DD / TD base. · Multiple first vectors / FD bases: refers to all FD bases. · Multiple Second Vectors / SD Bases: Refers to all SD bases. Multiple third vectors / DD bases / TD bases: Refers to all DD bases / TD bases.

[0130] In the context of this application, the terms "vector", "beam", "bases" and "basis" can be used interchangeably.

[0131] The terms "first vector," "first bases," "frequency domain / FD basis vector," "frequency domain / FD vector," "frequency domain / FD basis," "frequency domain / FD bases," and "first basis" may be used interchangeably.

[0132] The terms "second vector," "second beam," "beam," "second bases," "spatial domain / SD base vector," "spatial domain / SD vector," "spatial domain / SD base," and "second basis" can be used interchangeably.

[0133] The terms "third vector," "third bases," "Doppler / time domain base vector," "Doppler / time domain vector," "Doppler / time domain basis," "Doppler / time domain bases," "DD / TD base vector," "DD / TD vector," "DD / TD base," "Doppler / time domain bases," "DD / TD vector," and "third basis" can be used interchangeably.

[0134] The terms "time unit," "Doppler unit," "unit in the time domain," "unit in the Doppler domain," "time point," and "unit for the third vector" may be used interchangeably.

[0135] In the context of this application, the terms "transmission opportunity", "reception opportunity", "repetition", "transmission", "reception", "Physical Downlink Shared Channel (PDSCH) transmission opportunity", "PDSCH repetition", "Physical Uplink Shared Channel (PUSCH) transmission opportunity", "PUSCH repetition", "Physical Uplink Control Channel (PUCCH) opportunity", "PUCCH repetition", "repetitive transmission", "repetitive reception", "PDSCH transmission", "PDSCH reception", "PUSCH transmission", "PUSCH reception", "PUCCH transmission", "PUCCH reception", "RS transmission", "RS reception", "communication", "transmission" and "reception" can be used interchangeably.

[0136] In the context of this application, the terms "TCI state," "set of QCL parameters," "QCL parameter(s)," "QCL assumption," and "QCL configuration" can be used interchangeably. Also, the terms "TCI field," "TCI state field," and "transmission configuration indication" can be used interchangeably.

[0137] The terms "precoding matrix," "precoding," "beam," "beamforming," and "precoder" may be used interchangeably.

[0138] In the context of this application, the terms "single TRP", "single TCI state", "single TCI", "S-TCI", "single CORESET", "single control resource set pool", "S-TRP" and "S-TCI state" can be used interchangeably.

[0139] The terms "multiple TRPs", "multiple TCI states", "multiple CORESETs" and "multiple control resource set pools", "multiple TRPs", "multiple TCI states", "multiple TCIs", "multiple CORESETs" and "multiple control resource set pools", "MTRPs" and "M-TCIs", and "M-TPRs" can be used interchangeably.

[0140] In the context of this application, the terms "pool," "set," "subset," "group," "unit," and "subgroup" can be used interchangeably.

[0141] In the context of this application, the terms "index", "indicator", "indication", "field", "bit field" and "bitmap" can be used interchangeably. The terms "physical resource block", "resource block", "PRB" and "RB" can be used interchangeably. The terms "bit size", "size of bit", "number of bits", "size of field" and "field size" can be used interchangeably.

[0142] In the context of this application, the terms "element of an instruction field", "parameter" and "instruction" can be used interchangeably.

[0143] The principles and implementations of the present disclosure will be described in detail below with reference to the drawings.

[0144] Communication Network Example FIG. 2 illustrates an example communication environment 200 in which example embodiments of the present disclosure may be implemented.

[0145] The communication environment 200 includes a network device 210 and a terminal device 220, and the network device 210 can communicate with the terminal device 220 over a physical communication channel or link. The network device 210 may also provide more than one serving area.

[0146] In the specific example of communication environment 200, a link from terminal device 220 to network device 210 is referred to as an uplink, and a link from network device 210 to terminal device 220 is referred to as a downlink. Furthermore, communication environment 200 supports MIMO, where network device 210 and terminal device 220 communicate with each other via different beams, enabling directional communication. In the downlink, network device 210 is a transmitting (TX) device (or transmitter) and terminal device 220 is a receiving (RX) device (or receiver), and network device 210 may send downlink transmissions to terminal device 220 via one or more beams. As shown in FIG. 2, network device 210 sends downlink transmissions to terminal device 220 via beams 240-1 through 240-3.

[0147] Correspondingly, in the uplink, network device 210 is an RX device (or receiver), terminal device 220 is a TX device (or transmitter), and terminal device 220 may send uplink transmissions to network device 210 via one or more beams. As shown in Figure 2, terminal device 220 sends uplink transmissions to network device 210 via beams 230-1 through 230-3. For purposes of discussion, beams 230-1 through 230-3 or beams 240-1 through 240-3 will be referred to collectively or individually as beams 230 or beams 240, respectively.

[0148] In some embodiments, network device 210-1 may transmit configuration(s) for CSI feedback to terminal device 220, and terminal device 220 may also transmit CSI feedback to network device 210. In some embodiments, the CSI feedback is transmitted on a PUSCH. Alternatively, in some other embodiments, the CSI feedback is transmitted on a PUCCH.

[0149] 2, terminal device 220 may be in high / medium speed motion when transmitting feedback, and may be configured to have DD / TD-based reporting for CSI / PMI reporting, or TD / DD compression may be applied for the codebook.

[0150] It should be understood that the number of devices and their connections in Figure 2 are provided for illustrative purposes without implying any limitations of the present disclosure. Communication environment 200 may include any suitable number of network devices and / or terminal devices suitable for carrying out implementations of the present disclosure.

[0151] In some embodiments, terminal device 220 and network device 210 may communicate with each other via channels, such as wireless communication channels over an air interface (e.g., a Uu interface). The wireless communication channels may include a PUCCH, a PUSCH, a Physical Random-Access Channel (PRACH), a Physical Downlink Control Channel (PDCCH), a PDSCH, and a Physical Broadcast Channel (PBCH). Of course, any other suitable channels are also possible.

[0152] Communications in communication environment 200 may conform to any suitable standard, including, but not limited to, Global System for Mobile Communications (GSM), Long Term Evolution (LTE), LTE-Evolution, LTE-Advanced (LTE-A), New Radio (NR), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), GSM EDGE Radio Access Network (GERAN), Machine Type Communication (MTC), etc. Embodiments of the present disclosure may be performed in accordance with any currently known or future-developed generation of communication protocols. Examples of communication protocols include, but are not limited to, first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or sixth generation (6G) networks.

[0153] Process Example Although feature(s) / operation(s) are discussed individually in particular exemplary embodiments, it should be understood that, unless expressly indicated to the contrary, these feature(s) / operation(s) described in different exemplary embodiments may be used in any suitable combination.

[0154] Additionally, in the following description, several interactions are performed between terminal device 220 and network device 210 (e.g., exchanging configurations, etc.). It should be understood that the interactions may be implemented in either a single signaling / message or multiple signaling / messages, including system information, Radio Resource Control (RRC) messages, Downlink Control Information (DCI) messages, Uplink Control Information (UCI) messages, Media Access Control (MAC) Control Elements (CEs), etc. The disclosure is not limited in this respect.

[0155] The principles and implementations of the present disclosure are described in detail below with reference to Figure 3, which shows a signaling chart illustrating a communication process 300 according to some exemplary embodiments of the present disclosure. For discussion purposes, the process 300 will be described with reference to Figure 2. The process 300 involves a terminal device 220 and a network device 210.

[0156] As mentioned above, in some scenarios, the terminal device may move at high / medium speed, which may cause the reported CSI feedback to be unavailable for future channel prediction. To achieve better future channel prediction for the terminal device 220 at high / medium speed, TD / DD information is introduced. By reporting TD / DD information, the network device 210 can perform future channel prediction even when the terminal device 220 moves at high / medium speed.

[0157] In some embodiments, the CSI feedback may include a CSI-RS Resource Indicator (CRI), an RI, a PMI, a CQI, and a Layer Indicator (LI). The RI is calculated conditional on the CRI. The PMI is calculated conditional on the RI and CRI. The CQI is calculated conditional on the PMI, RI, and CRI. The LI is calculated conditional on the CQI, PMI, RI, and CRI. As mentioned above, to address high / medium speed movement of terminal device 220, the CSI feedback includes a CQI conditioned on a PMI corresponding to a time unit not prior to duration 210. The time unit may include one or more slots and may be different from or have the same length as the duration.

[0158] 4A shows a schematic diagram 400 of spatial domain, frequency domain, and Doppler / time domain based coding. As shown in FIG. 4A, multiple codebooks or precoding matrices include spatial domain, frequency domain, and DD / TD vectors. As shown in FIG. 4A, in the spatial domain, a first matrix W1 (e.g., SD base or composed of multiple second vectors) has a dimension of P*2L, where P denotes the number of antenna ports for CSI-RS resources or the number of antenna ports in an antenna port group, and L denotes the number of beams or second vectors (e.g., in each polarization group composed of two polarization directions).

[0159] In the frequency domain, a third matrix (e.g., an FD basis or a plurality of first vectors) W f H is M d * It has a dimension of N3, where N3 denotes the number of frequency units or the number of second sub-bands. For example, N3 can be understood as the number of sub-bands in the frequency domain. M v is the number of FD bases or first vectors. In the Doppler / time domain, a fourth matrix (e.g., Doppler / time domain base or composed of multiple third vectors) Wd H is M d *It has a dimension of N4, where N4 denotes the number of Doppler / time units and Md is the number of DD / TD bases or third vectors.

[0160] In some embodiments, as shown in Figure 4A, at each time point or time unit in the Doppler / time domain, such as t = 0, 1, 2, 3, ..., N4-1, there is a corresponding W(t). In the multiple codebooks or precoding matrices including spatial domain, frequency domain, and Doppler / time domain vectors, multiple codebooks or multiple precoding matrices W (e.g., corresponding W) corresponding to N3 subbands and / or N4 time units can be determined by the following Equation (1-1):

number

[0161] In some embodiments, there may be N4*N3 column vectors in multiple codebooks or precoding matrices W (e.g., each column vector is C p indexed or represented as C p is a positive integer, and 1≦C p ≦N4*N3). In some embodiments, the length or size of the vector in each column may be 2*N1*N2 or P. For example, the vector in each column may be a precoder corresponding to a time unit in the Doppler / time domain and a subband (e.g., a second subband) in the frequency domain. In some embodiments, W(t) may correspond to a subset of a codebook or precoding matrix W that corresponds to a time unit having an index and that corresponds to all second subbands in the frequency domain. In some embodiments, W(t) may be composed of multiple columns and / or multiple rows from multiple codebooks or precoding matrices W. For example, the multiple columns may be composed of multiple columns and / or multiple rows from multiple codebooks or precoding matrices W that correspond to index t+1≦C. pFor example, W(0) may be composed of vectors of multiple columns from the 1st column to the N3th column from multiple codebooks or precoding matrices W.

[0162] In some embodiments, in a plurality of codebooks or precoding matrices including spatial domain, frequency domain and Doppler / time domain vectors, a plurality of codebooks or precoding matrices W' corresponding to N3 subbands and / or N4 time units can be expressed as in Equation (1-2):

number

[0163] In some embodiments, at each point in time or time unit in the Doppler / time domain, such as t=0, 1, 2, 3,..., N4-1, there is a corresponding W(t). In some embodiments, there may be N4*N3 column vectors in multiple codebooks or precoding matrices W' (e.g., each column vector is C p may be indexed or represented as C p is a positive integer, and 1≦C p ≦N4*N3). In some embodiments, the length or size of the vector in each column may be 2*N1*N2 or P. For example, the vector in each column may be a Doppler / precoder corresponding to a time unit in the time domain and a second subband in the frequency domain.

[0164] In some embodiments, W(t) may correspond to a time unit having an index and may correspond to a subset of a codebook or precoding matrix corresponding to all second subbands in the frequency domain. In some embodiments, W(t) may be composed of multiple columns and / or multiple rows from a codebook or precoding matrix W′. For example, the multiple columns may be composed of multiple columns and / or multiple rows from a codebook or precoding matrix W′ having an index C p= t + f * N 4 + 1, where f is a non-negative integer and 0 ≤ f ≤ N 3 - 1. For example, W(0) may be composed of a vector of multiple columns with indices {1, N 4 + 1, 2 * N 4 + 1, ... (N 3 - 1) * N 4 + 1} from multiple codebooks or precoding matrices W'.

[0165] In some embodiments, the multiple codebooks or multiple precoding matrices corresponding to the N 3 subbands and / or N 4 time units may be denoted as W or W′.

[0166] In some embodiments, the plurality of codebooks or plurality of precoding matrices corresponding to the N3 subbands and / or N4 time units may include a first matrix (e.g., W1), a second matrix (e.g., TIFF2025528077000026.tif67 or TIFF2025528077000027.tif88), a third matrix (e.g., W f or W f H ), and a fourth matrix (e.g., W d or W d H ) may be composed of

[0167] In some embodiments, the size of the second matrix is ​​(2L)*(M v *M d In some embodiments, each element of the second matrix may be Pr (1) *P r,i,mv,md (2) *φ r,i,mv,md In some embodiments, Pr (1) may be the first amplitude coefficient corresponding to the layer with index r. In some embodiments, Pr (1) In some embodiments, P r (1) may be fixed to 1. In some embodiments, P r,i,mv,md(2) may be a second amplitude coefficient corresponding to a layer with index r, corresponding to one second vector with index i, corresponding to a third vector with index mv, and corresponding to a third vector with index md.

[0168] In some embodiments, φ r,i,mv,md may be a phase coefficient corresponding to a layer with index r, corresponding to a second vector with index i, corresponding to a third vector with index mv, and corresponding to a third vector with index md.

[0169] In some embodiments, Pr (1) The value of and / or P r,i,mv,md (2) The value of and / or φ r,i,mv,md The value of may be separate for each of the two polarizations or for different groups of the second vector.

[0170] In some embodiments, a third matrix or a plurality of second vectors (e.g., W f ) TIFF2025528077000028.tif20108. In some embodiments, W f The size is M v *N3 is also acceptable.

[0171] In some embodiments, n 3,l (mv) ∈{0,1,…,N3-1}.

[0172] In some embodiments, TIFF2025528077000029.tif26168.

[0173] In some embodiments, The file is TIFF2025528077000030.tif1862.

[0174] In some embodiments, z may be the index of the second subband, for example z={0, 1, ... N3-1}.

[0175] In some embodiments, one second vector is v i It may be expressed as: TIFF2025528077000031.tif1266

[0176] In some embodiments, TIFF2025528077000032.tif722, where B=v0v1…v L-1 For example, the size of W1 may be (2*N1*N2)*(2*L). For example, the size of each element of W1 may be (N1*N2)*L, and the "0" in W1 may be a zero matrix with size (N1*N2)*L.

[0177] In some embodiments The file is TIFF2025528077000033.tif1064.

[0178] In some embodiments, TIFF2025528077000034.tif8142. In some embodiments, mv may be a non-negative integer. For example, 0≦mv≦M v In some embodiments, W 2,mv Size (2L)*(M d ), for example, corresponding to a second vector with index mv and corresponding to a number of third vectors.

[0179] In some embodiments, TIFF2025528077000035.tif8143. In some embodiments, md may be a non-negative integer. For example, 0≦md≦M d In some embodiments, W 2,mdSize (2L)*(M v ) corresponding to a third vector with index md and corresponding to a plurality of second vectors.

[0180] In some embodiments, corresponding to the layer with index r, the second matrix is JPEG2025528077000036.jpg64168.

[0181] In some embodiments, TIFF2025528077000037.tif710 and TIFF2025528077000038.tif710 (e.g., TIFF2025528077000039.tif68) may be the first amplitude coefficient corresponding to the layer with index r. TIFF2025528077000040.tif716 may be a second amplitude coefficient corresponding to a layer with index r, a second vector with index i, a third vector with index mv, and a third vector with index md. TIFF2025528077000041.tif721 (e.g., ψ r,i,mv,md (same as) may be a phase coefficient corresponding to a layer with index r, a second vector with index i, a third vector with index mv, and a third vector with index md.

[0182] In some embodiments, for a codebook or precoding matrix or precoder corresponding to a layer with index r, corresponding to a second subband with index z, and corresponding to a time unit with index T, The file is TIFF2025528077000042.tif40162.

[0183] In some embodiments, γ z,r,T may be a variable for power calculation or power normalization.

[0184] In some embodiments, γ z,r,T may be based on a plurality of second amplitude coefficients, a plurality of phase coefficients, and a plurality of first amplitude coefficients. z,r,T may be based on the number of the plurality of second vectors, or may be based on at least one of the number of the plurality of first vectors and the number of the plurality of second vectors.

[0185] In some embodiments, The file is TIFF2025528077000043.tif18167.

[0186] In some embodiments, for bits or code points or values ​​of one or more indicators (or one or more bitmaps) for indicating non-zero coefficients whose value is zero, the second amplitude coefficient and / or phase coefficient corresponding to the bit or code point or value may be set to zero.

[0187] In some embodiments, a fourth matrix or a plurality of third vectors (e.g., W d ) JPEG2025528077000044.jpg1266. In some embodiments, d The size is M d *N4 is also acceptable.

[0188] In some embodiments, The file is TIFF2025528077000045.tif653.

[0189] In some embodiments, JPEG2025528077000046.jpg20116.

[0190] In some embodiments, JPEG2025528077000047.jpg1241.

[0191] In some embodiments, md may be the index of one third vector, e.g., md=0, 1, M d It is -1.

[0192] In some embodiments, the value of one first amplitude coefficient is: TIFF2025528077000048.tif28165. In some embodiments, the bit size for one first amplitude coefficient may be 4 bits. In some embodiments, the value of the indicator or field for one first amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}.

[0193] In some embodiments, an indicator or field for one first amplitude coefficient having a value of 0 may correspond to a first amplitude coefficient having a value of 0. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 1 may correspond to a first amplitude coefficient having a value of 1. TIFF2025528077000049.tif1414. In some embodiments, an indicator or field for one first amplitude coefficient having the value 2 may correspond to a first amplitude coefficient having the value TIFF2025528077000050.tif1227 may correspond to the first amplitude coefficient.

[0194] In some embodiments, an indicator or field for one first amplitude coefficient having a value of 3 may correspond to a first amplitude coefficient having a value of 1 / 8. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 4 may correspond to a first amplitude coefficient having a value of 1 / 8. TIFF2025528077000051.tif1227 may correspond to the first amplitude coefficient.

[0195] In some embodiments, an indicator or field for one first amplitude coefficient having a value of 5 TIFF2025528077000052.tif1411. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 6 may correspond to a first amplitude coefficient having a value of 6. TIFF2025528077000053.tif1223 may correspond to the first amplitude coefficient.

[0196] In some embodiments, an indicator or field for one first amplitude coefficient having a value of 7 may correspond to a first amplitude coefficient having a value of 1 / 4. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 8 may correspond to a first amplitude coefficient having a value of 1 / 4. TIFF2025528077000054.tif1223 may correspond to the first amplitude coefficient.

[0197] In some embodiments, an indicator or field for one first amplitude coefficient having the value 9 is TIFF2025528077000055.tif147. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 10 may correspond to a first amplitude coefficient having a value of 10. TIFF2025528077000056.tif1220 may correspond to the first amplitude coefficient.

[0198] In some embodiments, an indicator or field for one first amplitude coefficient having a value of 11 may correspond to a first amplitude coefficient having a value of 1 / 2. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 12 may correspond to a first amplitude coefficient having a value of 1 / 2. TIFF2025528077000057.tif1216 may correspond to the first amplitude coefficient.

[0199] In some embodiments, an indicator or field for one first amplitude coefficient having the value 13 is TIFF2025528077000058.tif147. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 14 may correspond to a first amplitude coefficient having a value of 14. TIFF2025528077000059.tif1216 may correspond to the first amplitude coefficient.

[0200] In some embodiments, an indicator or field for one first amplitude coefficient having a value of 15 may correspond to a first amplitude coefficient having a value of 1.

[0201] In some embodiments, the value of one first amplitude coefficient is: TIFF2025528077000060.tif1072. In some embodiments, the bit size for one first amplitude coefficient may be 4 bits. In some embodiments, the value of the indicator or field for one first amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7}.

[0202] In some embodiments, an indicator or field for one first amplitude coefficient having a value of 0 may correspond to a first amplitude coefficient having a value of 0. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 1 may correspond to a first amplitude coefficient having a value of 1. TIFF2025528077000061.tif1411 may correspond to the first amplitude coefficient.

[0203] In some embodiments, an indicator or field for one first amplitude coefficient having the value 2 TIFF2025528077000062.tif1411. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 3 may correspond to a first amplitude coefficient having a value of 1 / 4.

[0204] In some embodiments, an indicator or field for one first amplitude coefficient having the value 4 is TIFF2025528077000063.tif147 In some embodiments, an indicator or field for one first amplitude coefficient having a value of 5 may correspond to a first amplitude coefficient having a value of 1 / 2.

[0205] In some embodiments, an indicator or field for one first amplitude coefficient having the value 6 TIFF2025528077000064.tif147. In some embodiments, an indicator or field for one first amplitude coefficient having a value of 7 may correspond to a first amplitude coefficient having a value of 1.

[0206] In some embodiments, the first antenna port group (e.g., index T m ) may have a value of 1. In some embodiments, the first amplitude coefficient corresponding to the first antenna port group (e.g., the antenna port group with index T m ) may have a value of 15. In some embodiments, the value of the indicator or field for the first amplitude coefficient corresponding to the first antenna port group (e.g., the antenna port group with index T m The value of the first amplitude coefficient or the value of the indicator or field for the first amplitude coefficient corresponding to the antenna port group having the first amplitude coefficient (the antenna port group having the first amplitude coefficient) may not be reported in the PMI.

[0207] In some embodiments, the value of the first amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the indicator or field for the first amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the first amplitude coefficient or the value of the indicator or field for the first amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may not be reported in the PMI.

[0208] In some embodiments, the value of one second amplitude coefficient is: TIFF2025528077000065.tif28146. In some embodiments, the bit size for one second amplitude coefficient may be 4 bits. In some embodiments, the value of the indicator or field for one second amplitude coefficient may be one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}.

[0209] In some embodiments, an indicator or field for one second amplitude coefficient having a value of 0 may correspond to a second amplitude coefficient having a value of 0. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 1 may correspond to a second amplitude coefficient having a value of 1. TIFF2025528077000066.tif1414 may correspond to the second amplitude coefficient.

[0210] In some embodiments, an indicator or field for one second amplitude coefficient having the value 2 is TIFF2025528077000067.tif1227. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 3 may correspond to a second amplitude coefficient having a value of 1 / 8.

[0211] In some embodiments, an indicator or field for one second amplitude coefficient having the value 4 is TIFF2025528077000068.tif13150. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 5 may correspond to a value of TIFF2025528077000069.tif1411 may correspond to the second amplitude coefficient.

[0212] In some embodiments, an indicator or field for one second amplitude coefficient having the value 6 is TIFF2025528077000070.tif1223. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 7 may correspond to a second amplitude coefficient having a value of 1 / 4.

[0213] In some embodiments, an indicator or field for one second amplitude coefficient having the value 8 has the value TIFF2025528077000071.tif1223. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 9 may correspond to a value of TIFF2025528077000072.tif147 may correspond to the second amplitude coefficient.

[0214] In some embodiments, an indicator or field for one second amplitude coefficient having a value of 10 is TIFF2025528077000073.tif13150. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 11 may correspond to a second amplitude coefficient having a value of 1 / 2.

[0215] In some embodiments, an indicator or field for one second amplitude coefficient having a value of 12 is TIFF2025528077000074.tif1216. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 13 may correspond to a second amplitude coefficient having a value of 13. TIFF2025528077000075.tif147 may correspond to the second amplitude coefficient.

[0216] In some embodiments, an indicator or field for one second amplitude coefficient having a value of 14 is TIFF2025528077000076.tif1216. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 15 may correspond to a second amplitude coefficient having a value of 1.

[0217] In some embodiments, the value of one second amplitude coefficient is: TIFF2025528077000077.tif1072. In some embodiments, the bit size for one second amplitude coefficient may be 4 bits. In some embodiments, the value of the indicator or field for one second amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7}. In some embodiments, an indicator or field for one second amplitude coefficient having a value 0 may correspond to a second amplitude coefficient having a value 0.

[0218] In some embodiments, an indicator or field for one second amplitude coefficient having a value of 1 has a value TIFF2025528077000078.tif1411. In some embodiments, an indicator or field for one second amplitude coefficient having the value 2 may correspond to the value TIFF2025528077000079.tif1411. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 3 may correspond to a second amplitude coefficient having a value of 1 / 4. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 4 may correspond to a second amplitude coefficient having a value of 1 / 4. TIFF2025528077000080.tif147. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 5 may correspond to a second amplitude coefficient having a value of 1 / 2. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 6 may correspond to a second amplitude coefficient having a value of 1 / 2. TIFF2025528077000081.tif147. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 7 may correspond to a second amplitude coefficient having a value of 1.

[0219] In some embodiments, the value of one second amplitude coefficient is: TIFF2025528077000082.tif1067. In some embodiments, the bit size for one second amplitude coefficient may be 3 bits. In some embodiments, the value of the indicator or field for one second amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7}.

[0220] In some embodiments, an indicator or field for one second amplitude coefficient having a value of 0 is TIFF2025528077000083.tif1411. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 1 may correspond to a second amplitude coefficient having a value of 1 / 8. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 2 may correspond to a second amplitude coefficient having a value of 1 / 8. TIFF2025528077000084.tif1411. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 3 may correspond to a second amplitude coefficient having a value of 1 / 4. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 4 may correspond to a second amplitude coefficient having a value of 1 / 4. TIFF2025528077000085.tif1411. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 5 may correspond to a second amplitude coefficient having a value of 1 / 2. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 6 may correspond to a second amplitude coefficient having a value of 1 / 2. TIFF2025528077000086.tif147. In some embodiments, an indicator or field for one second amplitude coefficient having a value of 7 may correspond to a second amplitude coefficient having a value of 1. In some embodiments, one second amplitude coefficient may be a difference value corresponding to one first amplitude coefficient.

[0221] In some embodiments, the value of one second amplitude coefficient is { TIFF2025528077000087.tif147,1}. In some embodiments, the bit size for one second amplitude coefficient may be 1 bit. In some embodiments, the value of the indicator or field for one second amplitude coefficient may be one of {0, 1}. In some embodiments, the indicator or field for one second amplitude coefficient having the value 0 may have the value TIFF2025528077000088.tif147. In some embodiments, an indicator or field for a second amplitude coefficient having a value of 1 may correspond to a second amplitude coefficient having a value of 1. In some embodiments, a second amplitude coefficient may be a difference value corresponding to a first amplitude coefficient.

[0222] In some embodiments, the value of the second amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the indicator or field for the second amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the second amplitude coefficient or the value of the indicator or field for the second amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may not be reported in the PMI.

[0223] In some embodiments, for a bit or code point or value of one or more indicators (or one or more bitmaps) for indicating a non-zero coefficient whose value is 0, the value of the first amplitude coefficient corresponding to the bit or code point or value may be set to 0, and / or the value of the indicator or field for the first amplitude coefficient corresponding to the bit or code point or value may be set to 0. In some embodiments, the value of the first amplitude coefficient corresponding to the bit or code point or value, and / or the value of the indicator or field for the first amplitude coefficient corresponding to the bit or code point or value may not be reported in the PMI.

[0224] In some embodiments, for a bit or code point or value of one or more indicators (or one or more bitmaps) for indicating a non-zero coefficient whose value is 0, the value of the second amplitude coefficient corresponding to the bit or code point or value may be set to 0, and / or the value of the indicator or field for the second amplitude coefficient corresponding to the bit or code point or value may be set to 0. In some embodiments, the value of the second amplitude coefficient corresponding to the bit or code point or value, and / or the value of the indicator or field for the second amplitude coefficient corresponding to the bit or code point or value may not be reported in the PMI.

[0225] In some embodiments, for a bit or code point or value of one or more indicators (or one or more bitmaps) for indicating a non-zero coefficient whose value is 0, the value of at least one of the phase coefficients corresponding to the bit or code point or value may be set to 0, and / or the value of the indicator or field for at least one of the phase coefficients corresponding to the bit or code point or value may be set to 0. In some embodiments, the value of at least one of the phase coefficients corresponding to the bit or code point or value, and / or the value of the indicator or field for at least one of the phase coefficients corresponding to the bit or code point or value may not be reported in the PMI.

[0226] In some embodiments, the value of one phase factor is TIFF2025528077000089.tif420. In some embodiments, φ p may be an indicator or field value for the phase factor. In some embodiments, the value of a second phase factor is TIFF2025528077000090.tif420. In some embodiments, φ p may be a non-negative integer. In some embodiments, 0≦φ p ≦N PSK In some embodiments, φ p may be one of {0,1,2,3} or {0,1,2,3,4,5,6,7} or {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}. PSK is φ p In some embodiments, N PSK may be a positive integer. In some embodiments, N PSK may be one of {2,4,8,16,32,64}.

[0227] In some embodiments, the scope of work for CJT multi-TRP Type II codebook refinement includes downselecting at least one from predefined codebook structures or merging from predefined codebook structures.

[0228] In some embodiments, an example of a predefined codebook structure is enabled through SD / FD-based selection per TRP (port group or resource) and relative co-phase / amplitude (including wideband and / or sunband). An example formula (N=number of TRPs or TRP groups) is as follows: TIFF2025528077000091.tif38159 where a r = resonance amplitude, p r = co-phase. Furthermore, a r =p r = 1 (no coscaling) or a r Including the special case where =0.

[0229] In some embodiments, another example of a predefined codebook structure is enabled through joint SD-FD based selection per TRP (port group or resource) and relative co-phase / amplitude (including wideband and / or sunband). Exemplary formula (N=number of TRPs or TRP groups): TIFF2025528077000092.tif33114, where a r = resonance amplitude, p r = co-phase. Furthermore, a r =p r = 1 (no coscaling) or a r Including the special case where =0.

[0230] In some embodiments, yet another example of a predefined codebook structure is enabled through per-TRP (port group or resource) SD-based selection and joint (across N TRPs) FD-based selection. Exemplary formula (N=number of TRPs or TRP groups): The file is TIFF2025528077000093.tif3698.

[0231] In some embodiments, the working scope of Type II codebook refinement for high / medium speeds includes downselection from the following codebook structures: Regarding TD base A commonly chosen TD base for all SD / FD bases, e.g. TIFF2025528077000094.tif631, W d may be an identity with the special case, TD bases selected independently for different SD / FD bases. Regarding DD base A commonly selected DD base for all SD / FD bases, e.g. TIFF2025528077000095.tif631, W d may be an identity with the special case, DD bases selected independently for different SD / FD bases.

[0232] In some embodiments, multiple W2, a single W1, and W f The Release 16 / 17 Type II codebook with reports may be reused.

[0233] In some embodiments, the parameter M d refers to the number of bases for a DD / TD base, and parameter N4 refers to the length of the DD / TD base.

[0234] In some embodiments, terminal device 220 may report the number of DD / TD bases, the length of the DD / TD bases, the length of the time units associated with the Doppler / time domain, a bitmap of non-zero coefficients in a matrix associated with coefficients for the codebook, or any combination of the above to network device 210. Alternatively or additionally, terminal device 220 can receive from network device 210 the number of DD / TD bases, the length of the DD / TD bases, the length of the time units associated with the Doppler / time domain, a bitmap of non-zero coefficients in a matrix associated with coefficients for the codebook, or any combination of the above.

[0235] In some embodiments, length N4 of the DD / TD base or one third vector is configured by network device 210 or reported by terminal device 220. In one exemplary embodiment, terminal device 220 may include length N4 in CSI Part 1 and report the CSI to network device 210. In another exemplary embodiment, terminal device 220 may receive length N4 from network device 210. In some embodiments, length N4 may be the same as the time interval between CSI-RS resources for measurement.

[0236] In some embodiments, the number of bases M of the DD / TD base d is set by the network device 210 or reported by the terminal device 220. For example, the terminal device 220 may include a number M in CSI part 1. d In another example, the terminal device 220 may report CSI to the network device 210, including the CSI. d may be received.

[0237] In some embodiments, an indication of non-zero coefficients (e.g., a bitmap) may be reported by terminal device 220. The size of the bitmap is 2L*M for one layer with index r. d *M v where M vmay be the number of frequency base vectors or second vectors.

[0238] Specific M d , M v For a value, each bit in the bitmap maps to a particular Doppler frequency domain coefficient. An indication of the non-zero coefficients in the form of a bitmap may be reported by terminal device 220 to network device 210. For example, terminal device 220 may include a first indication field in the CSI indicating the non-zero coefficients and report the CSI to network device 210.

[0239] In some embodiments, the total number of non-zero amplitude / phase coefficients across the layers is M d may be calculated for all K DD / TD bases, i.e., NZ is.

[0240] Alternatively, in some embodiments, the number of non-zero amplitude / phase coefficients across a layer may be calculated on a per DD / TD basis, i.e., TIFF2025528077000096.tif643

[0241] In some embodiments, the number of SD bases is represented as L, where L is a positive integer.

[0242] In some embodiments, a selection or indication of multiple third vectors (e.g., Doppler / time-based) may be reported by terminal device 220 to network device 210. For example, terminal device 220 may transmit a selection or indication of multiple third vectors (e.g., Doppler / time-based) to network device 210 via an indication field in a CSI report. The size of the second indication field may be ceil(log2(C(Ns,Md))) or ceil(log2(Ns-1,Md-1)) (e.g., by rotating, one base is rotated to be [1,1,...1]), and Ns may be at least one of N4 (e.g., in the case of an orthogonal DFT base for the Doppler / time base), N4*O3 (e.g., in the case of an oversampling DFT base for the Doppler / time base), and N5 (e.g., a window selected from N4 or N4*O3, similar to the case where N3>19 for frequency domain compression, e.g., N5=A*Md, where A may be 2, 3, or 4).

[0243] In some embodiments, the strongest coefficient indicator (SCI) may be reported by terminal device 220 to network device 210. For example, terminal device 220 may transmit the SCI to network device 210 via an indication field (per layer indication) in the CSI report.

[0244] In some embodiments, the codebook matrix may be expressed as follows:

number

[0245] Below, we provide some examples of how to configure and report CSI feedback for scenarios where TD / DD domain compression (or CSI feedback associated with a DD / TD basis) is enabled.

[0246] In some embodiments, network device 210 may configure terminal device 220 to report CSI feedback, as shown in Figure 3. As shown in Figure 3, terminal device 220 receives 310 a configuration for CSI feedback(s) from the network device.

[0247] Terminal device 220 then transmits 330 CSI feedback to network device 210 based on the at least one configuration.

[0248] In some embodiments, the CSI feedback includes multiple partitions with different omission priorities, and the multiple partitions include parameters (also referred to as CSI information) to be reported. In particular, the parameters reported by the CSI feedback are associated with multiple first vectors, multiple second vectors, and multiple third vectors.

[0249] For better understanding, in the following description, the FD base is taken as an example of the first vector, the SD base as an example of the second vector, and the DD / TD base as an example of the third vector.

[0250] Thus, by associating the parameters with three types of vectors, the TD / DD information can be reported together with the SD information and the FD information. Furthermore, since these parameters are included in different partitions with different skip priorities, the network device 210 can at least perform future channel prediction for at least one beam, thereby ensuring uninterrupted communication between the network device and the terminal device.

[0251] In some embodiments, the priority may be determined based at least in part on the index of the third vector (ie, DD / TD based).

[0252] In some embodiments, terminal device 220 determines (320) priorities and includes parameters in multiple partitions of the CSI feedback based on the priorities. In some embodiments, terminal device 220 determines a first priority for each of a first vector (i.e., FD-based) among a plurality of first vectors. Alternatively or additionally, in some other embodiments, terminal device 220 determines a second priority for each of a second vector (i.e., SD-based) among a plurality of second vectors. Alternatively or additionally, in some other embodiments, terminal device 220 determines a third priority for each of a third vector (i.e., TD / DD-based) among a plurality of third vectors. Alternatively or additionally, in some other embodiments, terminal device 220 determines a fourth priority for each of parameters included in the CSI feedback. This can reduce the risk of discarding high-priority parameters.

[0253] In some embodiments, some priority rules for CSI feedback may be defined for high speed or medium speed terminal devices 220.

[0254] In some embodiments, some parameters (such as amplitude and / or phase coefficients) corresponding to the first vector and / or the second vector and / or the third vector are prioritized or associated with a higher priority. In some embodiments, a first subset of parameters has a higher priority than a second subset of parameters, the first subset of parameters corresponding to the DD / TD-based first subset, the SD-based first subset, and the FD-based first subset, while the second subset of parameters corresponding to the DD / TD-based second subset, the SD-based second subset, and the FD-based second subset.

[0255] Alternatively, in some embodiments, a first subset of parameters has a higher priority than a second subset of parameters, the first subset of parameters corresponding to multiple DD / TD bases, corresponding to a first subset of SD bases, and corresponding to a first subset of FD bases, and the second subset of parameters corresponding to multiple DD / TD bases, corresponding to a second subset of SD bases, and corresponding to a second subset of FD bases.

[0256] Alternatively, in some embodiments, a first subset of parameters has a higher priority than a second subset of parameters, the first subset of parameters corresponding to a first subset of DD / TD bases, corresponding to multiple SD bases, and corresponding to a first subset of FD bases, and the second subset of parameters corresponding to a second subset of DD / TD bases, corresponding to multiple SD bases, and corresponding to a second subset of FD bases.

[0257] Alternatively, in some embodiments, a first subset of parameters has a higher priority than a second subset of parameters, and the first subset of parameters corresponds to a first subset of DD / TD bases, corresponds to a first subset of SD bases, and corresponds to multiple FD bases, while the second subset of parameters corresponds to a second subset of DD / TD bases, corresponds to a second subset of SD bases, and corresponds to multiple FD bases.

[0258] Alternatively, in some embodiments, a first subset of parameters has a higher priority than a second subset of parameters, the first subset of parameters corresponding to a first subset of DD / TD bases, corresponding to a plurality of SD bases, and corresponding to a plurality of FD bases, and the second subset of parameters corresponding to a second subset of DD / TD bases, corresponding to a plurality of SD bases, and corresponding to a plurality of FD bases. In some embodiments, the first subset of parameters has a higher priority than a second subset of parameters, the first subset of parameters corresponding to a plurality of DD / TD bases, corresponding to a first subset of SD bases, and corresponding to a plurality of FD bases, while the second subset of parameters corresponds to a plurality of DD / TD bases, corresponding to a second subset of SD bases, and corresponding to a plurality of FD bases. In some embodiments, a first subset of parameters has a higher priority than a second subset of parameters, the first subset of parameters corresponding to multiple DD / TD bases, corresponding to multiple SD bases, and corresponding to a first subset of FD bases, while the second subset of parameters corresponding to multiple DD / TD bases, corresponding to multiple SD bases, and corresponding to a second subset of FD bases.

[0259] This ensures that at least a subset of CSI information with at least a DD / TD based subset has a high priority.

[0260] In some embodiments, parameters associated with a primary vector (which may be one of a primary first vector, a primary second vector, and a primary third vector) may be prioritized or associated with a higher priority. One example of a primary vector is a vector corresponding to the strongest coefficient. Another example of a primary vector is a vector corresponding to the strongest amplitude coefficient. Yet another example of a primary vector is a vector corresponding to the maximum power. This allows the network device to predict future channel conditions for at least the strongest beam.

[0261] Alternatively or additionally, in some embodiments, a strongest amplitude coefficient is present in at least one codebook indicator, and the strongest amplitude coefficient may correspond to a first index of a first vector, a second index of a second vector, and a third index of a third vector. In some embodiments, the first vector having the first index may correspond to a primary vector (e.g., a primary first vector). In some embodiments, the second vector having the second index may correspond to a primary vector (e.g., a primary second vector). In some embodiments, the third vector having the third index may correspond to a primary vector (e.g., a primary third vector).

[0262] Alternatively, in some embodiments, parameters associated with the first set of secondary vectors that include the primary secondary vector (i.e., the first set of SD bases that include the primary SD) may be prioritized or associated with a higher priority. This allows some strong beams (i.e., SD bases) that have at least a subset or all of the complete DD / TD bases to have a higher priority. For example, some strong beams (i.e., SD bases) that have multiple DD / TD bases may be associated with a higher priority.

[0263] Alternatively, in some embodiments, parameters associated with the first set of first vectors that include the primary first vector (i.e., the first set of FD bases that include the primary FD) may be prioritized or associated with a higher priority. This allows some strong subbands (i.e., FD bases) that have at least a subset or all of the complete DD / TD bases to have a higher priority. For example, some strong subbands (i.e., FD bases) that have multiple DD / TD bases may be associated with a higher priority.

[0264] Alternatively, in some embodiments, parameters associated with a first set of third vectors that includes a primary third vector (i.e., a first set of DD bases that includes a primary DD) may be prioritized or associated with a higher priority, such that some strong time / Doppler domain bases (i.e., TD / DD bases) with multiple frequency domain bases and / or multiple spatial domain bases have a higher priority.

[0265] Now, reference is made to Figures 4B and 4C. As shown in Figures 4B and 4C, parameters 424 and 464 correspond to a subset of the plurality of first vectors and / or a subset of the plurality of second vectors, and parameters 424 and 464 correspond to all of the plurality of tertiary bases (e.g., all DD / TD information or all DD / TD bases). Parameters 422 and 462 correspond to the plurality of first bases and / or the plurality of second bases (e.g., all of the plurality of SD bases and / or all of the plurality of FD bases, or, for example, all SD / FD information) in one specific time unit. For example, the DD / TD information of parameters 422 and 462 is incomplete. When terminal device 220 moves at high or medium speed, network device 210 cannot properly predict further channel conditions by relying on parameters 422 and 462 due to the lack of sufficient DD / TD information. In contrast, network device 210 can properly predict further channel conditions of some SD / FD bases by relying on parameters 424 and 464.

[0266] 4B, parameter 424 has a higher priority than parameter 422. In the exemplary embodiment of FIG. 4C, parameter 464 has a higher priority than parameter 462.

[0267] This ensures that at least some strong beams (with amplitude / phase coefficients) in the time and / or frequency domain are available when CSI information with lower omission priority is discarded.

[0268] In the following text, for better understanding, some examples of priority rules are listed as follows: In some embodiments, for a given CSI feedback (e.g., CSI report #n), each reported element of the indication field (e.g., bitmap, amplitude coefficient, and phase coefficient) indexed by one or more parameters is as follows: · r, layer index, i, the SD base index (or the index of the second base); md, DD / TD base index (or third-based index), and · f, FD base index (or first base index).

[0269] In one specific example, the priority associated with each reported element or PMI field (eg, parameter) may be determined by the following equation (3-1 or 3-2):

number

[0270] JPEG2025528077000099.jpg35168

[0271] According to the above formula (3-1) or (3-2), the order of contribution to the priority (e.g., parameter) may be {FD base index, DD / TD base index, SD base index, layer index}. For example, the order may be from lower priority to higher priority.

[0272] In another example, the priority associated with each reported element (eg, parameter) is determined by the following equation (3-3) or (3-4):

number

[0273] JPEG2025528077000101.jpg35168

[0274] According to the above formula (3-3) or formula (3-4), the order of contribution to the priority (e.g., parameter) may be {DD / TD base index, FD base index, SD base index, layer index}. For example, the order may be from lower priority to higher priority.

[0275] In some embodiments, the priority associated with each reported element (eg, parameter) is determined by the following equation (3-5) or (3-6):

number

[0276] JPEG2025528077000103.jpg35168

[0277] According to the above formula (3-5) or (3-6), the order of contribution to the priority (e.g., parameter) may be {FD base index, SD base index, DD / TD base index, layer index}. For example, the order may be from lower priority to higher priority.

[0278] In some embodiments, max(ρ(md)) is defined as md=0, 1, ..., M d It may also be the maximum value of ρ(md) that is −1.

[0279] In some embodiments, terminal device 220 may calculate a priority of at least one codebook indicator (or parameters corresponding to the layer index, the first base index, the second base index, and the third base index) based on the FD base index or based on the SD base index, and calculate another priority based on the DD / TD base index. In some embodiments, terminal device 220 may first calculate a priority of at least one codebook indicator (or parameters corresponding to the layer index, the first base index, the second base index, and the third base index) based on the FD base index, and then calculate another priority based on the DD / TD base index.

[0280] In some embodiments, terminal device 220 may first calculate a priority of at least one codebook indicator (or parameters corresponding to a layer index, a first base index, a second base index, and a third base index) based on a DD / TD base index, and then calculate another priority based on an SD base index or based on an FD base index.

[0281] In some embodiments, terminal device 220 may divide at least one of the bitmap (representing non-zero amplitude coefficients and / or non-zero phase coefficients), the plurality of amplitude coefficients, and the plurality of phase coefficients into two groups (e.g., a first group and a second group) based on a priority calculated based on the layer index, the first base index, and the second base index. For example, the first group may include a first subset of bits of the bitmap, a first subset of amplitude coefficients, and a first subset of phase coefficients having a higher priority, and the second group may include a second subset (or remainder) of bits of the bitmap, a second subset (or remainder) of amplitude coefficients, and a second subset (or remainder) of phase coefficients having a lower priority.

[0282] In some embodiments, terminal device 220 may divide the first group into two subgroups (e.g., a first subgroup and a second subgroup) based on a priority calculated based on the layer index, at least one of the first base index and the second base index, and / or the third base index. In some embodiments, terminal device 220 may divide the second group into two subgroups (e.g., a third subgroup and a fourth subgroup) based on a priority calculated based on the layer index, at least one of the first base index and the second base index, and / or the third base index.

[0283] For example, the first subgroup may include a first subgroup of the first subset of bits of the bitmap with a higher priority, a first subgroup of the first subset of amplitude coefficients, and a first subgroup of the first subset of phase coefficients, the second subgroup may include a second subgroup (or remainder) of the first subset of bits of the bitmap with a lower priority, a second subgroup (or remainder) of the first subset of amplitude coefficients, and a second subgroup (or remainder) of the first subset of phase coefficients, etc. In another example, the third subgroup may include a first subgroup of the second subset of bits of the bitmap with a higher priority, a first subgroup of the second subset of amplitude coefficients, and a first subgroup of the second subset of phase coefficients, and the fourth subgroup may include a second subgroup (or remainder) of the second subset of bits of the bitmap with a lower priority, a second subgroup (or remainder) of the second subset of amplitude coefficients, and a second subgroup (or remainder) of the second subset of phase coefficients, etc.

[0284] In some embodiments, terminal device 220 may calculate priorities based on the layer index, the SD base index, and the FD base index for the first group and the second group according to the following equation (4-1):

number

[0285] In some embodiments, the terminal device 220 may calculate the priorities of the first subgroup and the second subgroup, and / or the priorities of the third subgroup and the fourth subgroup based on the DD / TD base index using the following equation (4-2) or (4-3):

number

number

[0286] In some embodiments, terminal device 220 may calculate priorities based on the layer index, the SD base index, and the DD / TD base index for the first group and the second group according to the following equation (4-4):

number

[0287] In some embodiments, the terminal device 220 may calculate the priorities of the first subgroup and the second subgroup, and / or the priorities of the third subgroup and the fourth subgroup based on the FD base index using the following equation (4-5) or (4-6):

number

[0288] In some embodiments, terminal device 220 may calculate priorities based on the layer index, FD-based index, and DD / TD-based index for the first group and the second group according to the following equations (4-7) or (4-8) or (4-9) or (4-10) or (3-1) or (3-2) or (3-3) or (3-4) or (3-5) or (3-6).

number

[0289] In some embodiments, the terminal device 220 may calculate the priorities of the first subgroup and the second subgroup, and / or the priorities of the third subgroup and the fourth subgroup based on the SD base index using the following equation (4-11) or (4-12):

number

number

[0290] In one illustrative embodiment, terminal device 220 may first calculate a priority based on an FD base index and / or an SD base index and / or a layer index. Based on the calculated priority, the parameters may be divided into a highest / higher FD priority group (represented as group #1) and a lowest / lower FD priority group (represented as group #2). For each of group #1 and group #2, terminal device 220 may further calculate a priority based on a DD / TD base index. For example, based on the calculated priority, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup with the highest / higher FD priority and the highest / higher DD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup with the highest / higher FD priority and the lowest / lower DD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup with the lowest / lower FD priority and the highest / higher DD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup with the lowest / lower FD priority and the lowest / lower DD priority).

[0291] In some embodiments, terminal device 220 may calculate the priority based on the FD base index according to equation (5) below.

number

[0292] Furthermore, the terminal device 220 calculates the priority based on the DD / TD base index using the following formula (6) or formula (4-3).

number

[0293] In one exemplary embodiment, terminal device 220 may first calculate a priority based on a DD / TD base index and / or an SD base index and / or a layer index. Based on the calculated priority, the parameters may be divided into a highest / higher DD / TD priority group (represented as group #1) and a lowest / lower DD / TD priority group (represented as group #2). For each of group #1 and group #2, terminal device 220 may further calculate a priority based on an FD base index. For example, based on the calculated priority, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup with the highest / higher DD / TD or SD priority and the highest / higher FD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup with the highest / higher DD / TD or SD priority and the lowest / lower FD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup with the lowest / lower DD / TD or SD priority and the highest / higher FD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup with the lowest / lower DD / TD or SD priority and the lowest / lower FD priority).

[0294] In one exemplary embodiment, terminal device 220 may first calculate a priority based on a DD / TD base index and / or an FD base index and / or a layer index. Based on the calculated priority, the parameters may be divided into a highest / higher DD / TD or FD or layer priority group (represented as group #1) and a lowest / lower DD / TD or FD or layer priority group (represented as group #2). For each of group #1 and group #2, terminal device 220 may further calculate a priority based on an SD base index. For example, based on the calculated priority, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup with the highest / higher FD or DD / TD priority and the highest / higher SD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup with the highest / higher FD or DD / TD priority and the lowest / lower SD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup with the lowest / lower FD or DD / TD priority and the highest / higher SD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup with the lowest / lower FD or DD / TD priority and the lowest / lower SD priority).

[0295] In one illustrative embodiment, terminal device 220 may first calculate a priority based on an SD base index and / or a layer index. Based on the calculated priority, the parameters may be divided into a highest / higher SD or layer priority group (represented as Group #1) and a lowest / lower SD or layer priority group (represented as Group #2). For each of Group #1 and Group #2, terminal device 220 may further calculate a priority based on an FD base index and / or a DD / TD base index. For example, based on the calculated priority, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup with the highest / higher SD or layer priority and the highest / higher FD or DD / TD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup with the highest / higher SD or layer priority and the lowest / lower FD or DD / TD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup with the lowest / lower SD or layer priority and the highest / higher FD or DD / TD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup with the lowest / lower SD or layer priority and the lowest / lower FD or DD / TD priority).

[0296] In one exemplary embodiment, terminal device 220 may first calculate a priority based on an FD-based index and / or a layer index. Based on the calculated priority, the parameters may be divided into a highest / higher FD or layer priority group (represented as group #1) and a lowest / lower FD or layer priority group (represented as group #2). For each of group #1 and group #2, terminal device 220 may further calculate a priority based on an SD-based index and / or a DD / TD-based index. For example, based on the calculated priority, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup with the highest / higher FD or layer priority and the highest / higher SD or DD / TD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup with the highest / higher FD or layer priority and the lowest / lower SD or DD / TD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup with the lowest / lower FD or layer priority and the highest / higher SD or DD / TD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup with the lowest / lower FD or layer priority and the lowest / lower SD or DD / TD priority).

[0297] In one illustrative embodiment, terminal device 220 may first calculate a priority based on a DD / TD base index and / or a layer index. Based on the calculated priority, the parameters may be divided into a highest / higher DD / TD or layer priority group (represented as group #1) and a lowest / lower DD / TD or layer priority group (represented as group #2). For each of group #1 and group #2, terminal device 220 may further calculate a priority based on an FD base index and / or an SD base index. For example, based on the calculated priority, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup with the highest / higher DD / TD or layer priority and the highest / higher FD or SD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup with the highest / higher DD / TD or layer priority and the lowest / lower FD or SD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup with the lowest / lower DD / TD or layer priority and the highest / higher FD or SD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup with the lowest / lower DD / TD or layer priority and the lowest / lower FD or SD priority).

[0298] In some embodiments, the parameters may be divided into four groups as follows: > Group #1-1: Parameters with the highest FD priority and the highest DD / TD priority, > Group #1-2: Parameters with the highest FD priority and the lowest DD / TD priority, > Group #2-1: Parameters with the lowest FD priority and the highest DD / TD priority, > Group #2-2: Parameters with the lowest FD priority and the lowest DD / TD priority.

[0299] In another exemplary embodiment, terminal device 220 first calculates a priority based on a DD / TD base index. Based on the calculated priority, the parameters may be divided into a highest DD / TD priority group (represented as Group #1) and a lowest DD / TD priority group (represented as Group #2). For each of Group #1 and Group #2, terminal device 220 further calculates a priority based on an FD base index. In some embodiments, the parameters may be divided into four groups as follows: > Group #1-1: Parameters with the highest DD / TD priority and the highest FD priority, > Group #1-2: Parameters with the highest DD / TD priority and the lowest FD priority, > Group #2-1: Parameters with the lowest DD / TD priority and the highest FD priority, > Group #2-2: Parameters with the lowest DD / TD priority and the lowest FD priority.

[0300] In some embodiments, terminal device 220 may first calculate priorities based on a first base index (or a second base index or a third base index) and / or a layer index. Based on the calculated priorities, the parameters may be divided into a highest / higher priority group (represented as group #1) and a lowest / lower priority group (represented as group #2). For each of group #1 and group #2, terminal device 220 may then calculate priorities based on the second base index (or the third base index or the first base index). For example, based on the calculated priorities, the parameters may be divided into a first subgroup (represented as group #1-1), a second subgroup (represented as group #1-2), a third subgroup (represented as group #2-1), and a fourth subgroup (represented as group #2-2).

[0301] Furthermore, for each of subgroup #1-1, subgroup #1-2, subgroup #2-1, and subgroup #2-2, terminal device 220 may then calculate a priority based on the third base index (or the first base index or the second base index). For example, based on the calculated priority, the parameters may be divided into a first subset (represented as group #1-1-1), a second subset (represented as group #1-1-2), a third subset (represented as group #1-2-1), a fourth subset (represented as group #1-2-2), a fifth subset (represented as group #2-1-1), a sixth subset (represented as group #2-1-2), a seventh subset (represented as group #2-2-1), and an eighth subset (represented as group #2-2-2).

[0302] It should be understood that all the above-described exemplary embodiments are merely illustrative, without implying any limitations, and the specific manner for determining priority may be modified based on the teachings of the above-described exemplary embodiments, and such modified embodiments should also be considered within the scope of the present disclosure.

[0303] As described above, the CSI feedback includes multiple partitions with different omission priorities. Figures 5A and 5B illustrate example blocks of CSI feedback 500 and 550 according to some embodiments of the present disclosure. It should be understood that the specific structures illustrated in Figures 5A and 5B are for illustrative purposes only, without implying any limitations. In other words, the number of partitions, or information groups, may be changed in other exemplary embodiments.

[0304] In the following text, examples of how parameters can be included in different partitions of the CSI feedback are described with reference to Figures 5A and 5B.

[0305] It is to be clear that the following examples are for illustrative purposes only, without implying any limitations. Furthermore, although certain parameters are described as being included in certain partitions, in other embodiments, all described parameters and described partitions may be modified based on the teachings of the exemplary embodiments described below, and such modifications should also be considered within the scope of the present disclosure.

[0306] As shown in Figures 5A and 5B, the CSI feedback includes at least a first partition (e.g., CSI Part 1) and a second partition (e.g., CSI Part 2). In some embodiments, the first partition is configured to have a higher omission priority than the second partition. Alternatively or additionally, in some embodiments, the payload size of the second partition is based on at least one indication in the first partition. Alternatively or additionally, in some embodiments, the second partition includes multiple information groups, and a first information group of the multiple information groups is configured to have a higher omission priority than other information groups of the multiple information groups.

[0307] In some embodiments, the number of information groups included in the second partition is greater than or equal to 3. When the number of information groups is equal to 3, the CSI feedback may reuse the current CSI report structure. Alternatively, when the number of information groups is greater than 3, the structure of the CSI feedback is more feasible.

[0308] Since the first information group or the first partition of the second partition has a relatively high skip priority, the relatively important parameters may be included in the first partition or the first information group.

[0309] Examples of relatively important parameters include: An indication of whether the CSI feedback is associated with a third vector (e.g., DD / TD based) or whether DD / TD compression is enabled; A set of CQIs corresponding to a particular time unit; the index of a specific time unit, the first number of non-zero coefficients corresponding to the primary vector, Primary-based indexes, the total number of non-zero coefficients, the length of multiple third vectors, or Number of multiple third vectors Including, but not limited to:

[0310] If the relatively important parameters are included in the first partition, the relatively important parameters may enjoy the highest omission priority. If the relatively important parameters are included in the first information group of the second partition, the first partition of the CSI feedback may reuse the current structure of CSI Part 1.

[0311] In some embodiments, the first information group of the second partition may further indicate the strongest coefficients for the layer corresponding to the primary vector.

[0312] In some embodiments, the non-zero coefficient information may also be included in other information groups of the second partition (i.e., not in the first information group, but, for example, in the second and third information groups shown in FIG. 5A). In some embodiments, the non-zero coefficient information may indicate a bitmap indicating associated non-zero coefficients, amplitude coefficients corresponding to the associated non-zero coefficients, or phase coefficients corresponding to the associated non-zero coefficients.

[0313] Furthermore, the associated non-zero coefficients may be associated with either a primary first vector (i.e., a primary FD base), a primary second vector (i.e., a primary SD base), or a primary third vector (i.e., a primary DD / TD base).

[0314] Alternatively, the associated non-zero coefficients may be associated with a subset of multiple first vectors including or excluding the primary first vector (i.e., an FD-based subset including or excluding the primary FD), a subset of multiple second vectors including or excluding the primary second vector (i.e., an SD-based subset including or excluding the primary DD), or a subset of multiple third vectors including or excluding the primary third vector (i.e., a TD / DD-based subset including or excluding the primary TD / DD).

[0315] Alternatively, the associated non-zero coefficients may be associated with any of a plurality of first vectors (i.e., all FD bases), a plurality of second vectors (i.e., all SD bases), and a plurality of third vectors (i.e., all DD / TD bases).

[0316] Furthermore, non-zero coefficients associated with one particular vector / vector set may have different priority levels, in which case parameters associated with the same vector / vector set but with different priority levels may be included in different information groups.

[0317] 5A, the other information group includes a second information group and a third information group having a lower omission priority than the second information group, where the second information group indicates first non-zero coefficient information corresponding to a non-zero coefficient having a higher priority, and the third information group indicates second non-zero coefficient information corresponding to a non-zero coefficient having a lower priority.

[0318] For better understanding, some examples regarding CSI feedback are provided below. In the following text, different partitions / information groups may be described separately, and therefore, some parameters will be included in multiple described partitions / information groups. However, this does not mean that such parameters need to be transmitted multiple times, but rather that such parameters may be included in any partition / information group. In other words, as a general rule for including parameters in partitions / information groups, parameters included in different partitions / information groups should not overlap or be repeated.

[0319] In some embodiments, the first partition (e.g., CSI Part 1) may indicate at least one of the following parameters: An indication of DD / TD base type or presence or absence of DD / TD compression (if reported). Specifically, if the indication indicates that the CSI feedback is associated with DD / TD base (or associated with DD / TD compression), the priority rules described in this disclosure apply. If multiple CQI sets (corresponding to multiple time units) are reported, a first CQI set (including a wideband CQI and / or a first subband differential CQI set) corresponding to a first time unit; the index of the first time unit, An indication of the total number of non-zero amplitude / phase coefficients across layers corresponding to each of the DD / TD or FD or SD bases (e.g., TIFF2025528077000114.tif47), where the total number of non-zero amplitude / phase coefficients across the layers is It may be a total of TIFF2025528077000115.tif47. The (relative) index of the first DD / TD base (i.e., primary third vector) or the first FD base (i.e., primary first vector) or the first SD base (i.e., primary second vector) may be included in CSI Part 1. The first DD / TD / FD / SD base corresponds to the strongest coefficient. A length N4 of the DD / TD base set by the network device 210 or reported by the terminal device 220. There may be N4 time unit indexes. a base number Md configured by the network device 210 or reported by the terminal device 220; Rank indicator (v ri etc.), one CQI set (including wideband CQI and / or first subband differential CQI set) (if only one CQI set is reported); An indication of the total number of non-zero amplitude / phase coefficients across layers corresponding to multiple TRPs (K NZ etc.).

[0320] In some embodiments, the first information group of the second partition (e.g., Group 0 of CSI Part 2) may indicate at least one of the following parameters: The strongest coefficients for each layer corresponding to the first / primary DD / TD base (i.e., primary third vector), the first / primary FD base (i.e., primary first vector), or the first / primary SD base (i.e., primary second vector) may be included in CSI Part 1. The first DD / TD base / FD base / SD base corresponds to the strongest coefficient. a relative strongest coefficient indication for each layer corresponding to each of the subsets of DD / TD bases (i.e., the subsets of TD / DD bases excluding the first TD / DD base); The final values ​​of the amplitude and / or phase coefficients of the strongest coefficients corresponding to each of the Doppler / time-based subsets may be based on reported values ​​(i.e., not assumed to be 1). The amplitude and / or phase coefficients of the strongest coefficients have higher priority. SD-based indicators that support multiple TRPs (i.e., 1,2 ), ·SD rotation factor corresponding to multiple TRPs (i.e., i 1,1 ), Strongest coefficients for each layer.

[0321] In some embodiments, one of the other information groups (such as the second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: a relative co-phase coefficient and / or a relative amplitude coefficient between the DD / TD bases (or corresponding to a subset of the TD / DD bases excluding the first TD / DD base), The phase and / or amplitude coefficients corresponding to each of the subsets of DD / TD bases may be differential based on relative co-phase and / or relative amplitude coefficients. (in the case of per-base SCI reporting) a relative strongest coefficient indication for each layer corresponding to each subset of DD / TD bases (subsets of TD / DD bases excluding the first TD / DD base); > The final values ​​of the amplitude and / or phase coefficients of the strongest coefficients corresponding to each of the TD / DD based subsets may be based on the reported values ​​(i.e., not assumed to be 1). The amplitude and / or phase coefficients of the strongest coefficients have higher priority. DD / TD based indicators (for each layer), · Initial index for DD / FD base window (if needed).

[0322] In the following, some examples will be described with respect to the FD base. It should be understood that the examples described with respect to the FD base are also suitable for the DD / TD base / SD base. For the sake of brevity only, similar content will be omitted here.

[0323] As described above, the non-zero coefficient information may be represented by other information groups (i.e., the second and third information groups shown in FIG. 5A, instead of the first information group). Some examples of other information groups will be described below.

[0324] In some embodiments, another information group (such as a second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: ·Multiple highest priority elements of the bitmap (i 1,7,r ) (corresponding to multiple FD bases, i.e., all FD bases), > where the bitmap indicates whether the corresponding amplitude / phase coefficients corresponding to multiple FD bases are reported or not, and the field size is 2*L*v ri *M v *M d may be. > where the number of multiple highest priority elements in the bitmap is Y 1_1_1 It may be, for example, JPEG2025528077000116.jpg575 Multiple highest priority elements of the amplitude coefficient indicator (i 2,4,r ) (e.g., multiple subsets of amplitude coefficients corresponding to multiple FD bases), > where the number of highest priority elements of the subset of amplitude coefficients is Y 2_1_1 It may be, for example, JPEG2025528077000117.jpg861 ·Multiple highest priority elements of the phase coefficient indicator (i 2,5,r ) (e.g., multiple subsets of phase coefficients corresponding to multiple FD bases), > where the number of highest priority elements of the subset of phase coefficients is Y 3_1_1 It may be, for example, JPEG2025528077000118.jpg868

[0325] This allows the highest priority of multiple FD bases to be prioritized.

[0326] Alternatively, in some embodiments, another information group (such as a second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: A number of highest priority elements (i 1,7,r,s ), > where the bitmap indicates whether the corresponding amplitude / phase coefficients corresponding to the first TRP are reported or not, and the field size is 2*L*v ri *M d may be. Here, the number of the highest priority elements of the bitmap may be Y1_2_1, for example: TIFF2025528077000119.tif574 · Multiple highest priority elements of amplitude coefficient indicator (i 2,4,r,s ) (e.g., a subset of the plurality of amplitude coefficients corresponding to the first FD base), > where the number of highest priority elements of the subset of amplitude coefficients is Y 2_2_1 It may be, for example, JPEG2025528077000120.jpg861 · Multiple highest priority elements of phase coefficient indicator (i 2,5,r,s ) (e.g., a subset of the plurality of phase coefficients corresponding to the first FD base), > where the number of highest priority elements of the subset of phase coefficients is Y 3_2_1 It may be, for example, JPEG2025528077000121.jpg868

[0327] This allows prioritizing all non-zero coefficient information with the first FD, which has the highest priority.

[0328] Alternatively, in some embodiments, another information group (such as a second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: All parameters of the bitmap (corresponding to the first FD base) (i 1,7,r,s ), > where the bitmap indicates whether the corresponding amplitude / phase coefficients corresponding to the first FD base are reported or not, and the field size is 2*L*v ri *M d may be. Amplitude coefficient indicator (i 2,4,r,s ) (e.g., a plurality of amplitude coefficients corresponding to the first FD base), > where the number of amplitude coefficients is Y 2_4_1 It may be, for example, JPEG2025528077000122.jpg485 Phase Coefficient Indicator (i 2,5,r,s ) (e.g., a plurality of phase coefficients corresponding to a first FD base), > where the number of phase coefficients is Y 3_4_1 It may be, for example, JPEG2025528077000123.jpg485

[0329] This allows you to prioritize all parameters you want to associate with the primary FD base.

[0330] Alternatively, in some embodiments, another information group (such as a second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: A bitmap (i) (corresponding to the first set of FD bases, i.e., the set of FD bases including the first / primary FD base) 1,7,r,t1 ), > where the bitmap indicates whether the relevant amplitude / phase coefficients corresponding to the first set of FD bases are reported or not, and the field size is It could also be TIFF2025528077000124.tif878. Amplitude coefficient indicator (i 2,4,r,t1 ) (e.g., a plurality of amplitude coefficients corresponding to a first set of FD bases), > where the number of amplitude coefficients is Y 2_5_1 It may be, for example, JPEG2025528077000125.jpg1688 Phase Coefficient Indicator (i 2,5,r,t1 ) (e.g., a plurality of phase coefficients corresponding to a first set of FD bases), > where the number of phase coefficients is Y 3_5_1 It may be, for example, JPEG2025528077000126.jpg588 FD-based index for each layer (i 1,6,r ), Initial index (i 1,5 ), Reference amplitude for weak polarization for each layer (i 2,3,r ).

[0331] This allows prioritizing all parameters that you associate with a set of FD bases, including the first / primary FD base.

[0332] In some embodiments, another information group (such as a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: A number of lowest priority elements ( i1,7,r ), > where the bitmap indicates whether the corresponding amplitude / phase coefficients corresponding to multiple FD bases are reported or not, and the field size is 2*L*v ri *M v *M d may be. > where the number of lowest priority elements in the bitmap is Y 1_1_2 It may be, for example, JPEG2025528077000127.jpg537·Multiple lowest priority elements of amplitude coefficient indicator (i 2,4,r ) (e.g., multiple subsets of amplitude coefficients corresponding to multiple FD bases), > where the number of lowest priority elements of the subset of amplitude coefficients is Y 2_1_2 It may be, for example, JPEG2025528077000128.jpg867 · Multiple lowest priority elements of phase coefficient indicator (i 2,5,r ) (e.g., multiple subsets of phase coefficients corresponding to multiple FD bases), > where the number of lowest priority elements of the subset of phase coefficients is Y 3_1_2 It may be, for example, JPEG2025528077000129.jpg872

[0333] Alternatively, in some embodiments, another information group (such as a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: The lowest priority elements (i 1,7,r,s ), > where the bitmap indicates whether the corresponding amplitude / phase coefficients corresponding to the first TRP are reported or not, and the field size is 2*L*v ri *M d may be. > where the number of lowest priority elements in the bitmap is Y 1_2_2 It may be, for example, JPEG2025528077000130.jpg540·Multiple lowest priority elements of amplitude coefficient indicator (i 2,4,r,s ) (e.g., a subset of the plurality of amplitude coefficients corresponding to the first FD base), > where the number of lowest priority elements of the subset of amplitude coefficients is Y 2_2_2 It may be, for example, JPEG2025528077000131.jpg863 · Multiple lowest priority elements of phase coefficient indicator (i 2,5,r,s ) (e.g., a subset of the plurality of phase coefficients corresponding to the first FD base), > where the number of lowest priority elements of the subset of phase coefficients is Y 3_2_2 It may be, for example, JPEG2025528077000132.jpg867

[0334] Alternatively, in some embodiments, another information group (such as a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: A number of highest priority elements (i 1,7,r,t ), > where the bitmap indicates whether the relevant amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size is 2*L*v ri *(M v -1)*M d may be. > where the number of multiple highest priority elements in the bitmap is Y 1_3_1 It may be, for example, JPEG2025528077000133.jpg694 · Multiple highest priority elements of amplitude coefficient indicator (i 2,4,r,t ) (e.g., a subset of amplitude coefficients corresponding to a subset of FD bases), > where the number of highest priority elements of the subset of amplitude coefficients is Y 2_3_1 It may be, for example, JPEG2025528077000134.jpg1030 · Multiple highest priority elements of phase coefficient indicator (i 2,5,r,t ) (e.g., a subset of phase coefficients corresponding to a subset of the FD base), > where the number of highest priority elements of the subset of phase coefficients is Y 3_3_1It may be, for example, JPEG2025528077000135.jpg1035

[0335] Alternatively, in some embodiments, another information group (such as a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i) (corresponding to a subset of FD bases, i.e., a set of FD bases excluding the first FD) 1,7,r,t ), > where the bitmap indicates whether the relevant amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size is 2*L*v ri *(M v -1)*M d may be. Amplitude coefficient indicator (i 2,4,r,t ) (e.g., multiple amplitude coefficients corresponding to a subset of the FD bases), > where the number of amplitude coefficients is Y 2_4_2 It may be, for example, JPEG2025528077000136.jpg531 Phase Coefficient Indicator (i 2,5,r,t ) (e.g., multiple phase coefficients corresponding to subsets of the FD base), > where the number of phase coefficients is Y 3_4_2 It may be, for example, JPEG2025528077000137.jpg535

[0336] Alternatively, in some embodiments, another information group (such as a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: a bitmap (i) (corresponding to a second set of FD bases different from the first set of FD bases containing the first FD base) 1,7,r,t2 ), > where the bitmap indicates whether the corresponding amplitude / phase coefficients corresponding to the second set of FD bases are reported or not, and the field size is It could also be TIFF2025528077000138.tif877. Amplitude coefficient indicator (i 2,4,r,t2 ) (e.g., a plurality of amplitude coefficients corresponding to a second set of FD bases), > where the number of amplitude coefficients is Y 2_5_2 It may be, for example, JPEG2025528077000139.jpg527 Phase Coefficient Indicator ( i2,5,r,t2 ) (e.g., a plurality of phase coefficients corresponding to a second set of FD bases), > where the number of phase coefficients is Y 3_5_2 It may be, for example, JPEG2025528077000140.jpg527

[0337] As mentioned above, the number of information groups may be greater than 3. Below, some examples where the number of information groups is greater than 3 will be described.

[0338] In some embodiments, another information group (such as the fourth information group, e.g., Group 3 of CSI Part 2) may indicate at least one of the following parameters / elements: A number of lowest priority elements (i 1,7,r,t ), > where the bitmap indicates whether the relevant amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size is 2*L*v ri *(M v -1)*M d may be. > where the number of lowest priority elements in the bitmap is Y 1_3_2 It may be, for example, JPEG2025528077000141.jpg1032 · Multiple lowest priority elements of amplitude coefficient indicator (i 2,4,r,t ) (e.g., a subset of amplitude coefficients corresponding to a subset of FD bases), where the number of lowest priority elements of the second subset of amplitude coefficients is Y 2_3_2 It may be, for example, JPEG2025528077000142.jpg1030 · Multiple lowest priority elements of phase coefficient indicator (i 2,5,r,t ) (e.g., a subset of phase coefficients corresponding to a subset of the FD base), > where the number of lowest priority elements of the subset of phase coefficients is Y 3_3_2 It may be, for example, JPEG2025528077000143.jpg1035

[0339] In some embodiments, terminal device 220 may report multiple CQI sets (each CQI set may include a wideband CQI and / or multiple subband CQIs).

[0340] In some embodiments, a first CQI set may be reported in a first partition (eg, CSI Part 1), and other sets of the multiple CQI sets may be reported in Group 0 or Group 1.

[0341] In some embodiments, other sets of the plurality of CQI sets may have lower priority than any of the indication of DD / TD base type or presence or absence of DD / TD compression, DD / TD base index, and the first CQI set.

[0342] In some embodiments, other sets of multiple CQI sets may be reported only if DD / TD basis or DD / TD compression is applied.

[0343] The above examples are described with respect to specific information groups. Below, some examples are described with respect to specific combinations of information groups. Furthermore, in the following examples, priority levels include the highest priority and the lowest priority. Specifically, the highest priority parameter refers to the multiple highest priority elements (parameters) in the codebook indication field, the lowest priority parameter refers to the multiple lowest priority elements in the codebook indication field, and all parameters refers to all elements (parameters) in the codebook indication field.

[0344] In some embodiments, the codebook indication field may include at least one of a bitmap, an amplitude coefficient indication field, and a phase coefficient indication field.

[0345] Similar to the above description, some examples will be described below with respect to the FD base. It should be understood that the examples described with respect to the FD base are also suitable for the SD base. For the sake of brevity only, similar content will be omitted here.

[0346] In some embodiments, for a given CSI feedback, the correspondence between the parameters and other information groups of the second partition may be defined as follows: · Second information group (e.g., CSI group 1): The highest priority parameter of the first set of FD bases (i.e., the set of FD bases that includes the first FD base). · Third information group (e.g., CSI group 2): The lowest priority parameters of the first set based on FD and all parameters of the second set based on FD.

[0347] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between parameters and other information groups in the second partition (eg, CSI part 2) may be defined as follows: · Second information group (e.g. CSI group 1): all parameters of the first set of FD bases. ·Third information group (e.g. CSI group 2): all parameters of the second set of FD bases.

[0348] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters and other information groups in the second partition (e.g., CSI Part 2) may be defined as follows: · Second information group (e.g., CSI group 1): The first set of highest priority parameters based on FD. Third information group (e.g., CSI group 2): The lowest priority parameters of the first set based on FD and the highest priority parameters of the second set based on FD. · Fourth information group (e.g., CSI group 3): The second set of lowest priority parameters based on FD.

[0349] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between parameters and other information groups in the second partition (eg, CSI part 2) may be defined as follows: · Second information group (e.g. CSI group 1): The highest priority parameter determined on an FD basis and the highest priority parameter determined on a DD / TD basis. · Third information group (e.g., CSI Group 2): The lowest priority parameter determined on an FD basis and the highest priority parameter determined on a DD / TD basis. · Fourth information group (e.g., CSI group 3): The highest priority parameter determined on an FD basis and the lowest priority parameter determined on a DD / TD basis. · Fifth information group (e.g. CSI group 4): Minimum priority parameters determined on an FD basis and minimum priority parameters determined on a DD / TD basis.

[0350] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between parameters and other information groups in the second partition (eg, CSI part 2) may be defined as follows: · Second information group (e.g. CSI group 1): The highest priority parameter determined on an FD basis and the highest priority parameter determined on a DD / TD basis. · Third information group (e.g., CSI Group 2): The highest priority parameter determined on an FD basis and the lowest priority parameter determined on a DD / TD basis. · Fourth information group (e.g., CSI Group 3): The lowest priority parameter determined on an FD basis and the highest priority parameter determined on a DD / TD basis. · Fifth information group (e.g. CSI group 4): Minimum priority parameters determined on an FD basis and minimum priority parameters determined on a DD / TD basis.

[0351] It should be understood that the above examples are given for illustrative purposes only, without implying any limitation.

[0352] In some embodiments, the CSI feedback includes multiple CSI reports, each corresponding to a respective time unit of the multiple time units. Figure 5B illustrates an example block diagram of CSI feedback 550 according to some embodiments of the present disclosure, where CSI feedback 550 includes more than one CSI report.

[0353] In some embodiments, each CSI report comprises: at least one amplitude coefficient corresponding to each time unit; at least one phase coefficient corresponding to each time unit; the number of non-zero coefficients corresponding to each time unit, A bitmap of non-zero coefficients, and The strongest coefficient for each resource layer, At least one of the following is shown.

[0354] In some embodiments, when a CSI report of the plurality of CSI reports corresponds to the first time unit, the CSI report further indicates at least one of an RI, a CQI, and the number of the plurality of time units.

[0355] In some embodiments, for CSI reporting for high / medium speed, there may be a set of CSI / PMI reports (as shown in FIG. 5B), and the number of CSI / PMI reports may be T (where T is the number of time units for CSI / PMI reporting), with each CSI / PMI report corresponding to one time unit.

[0356] In some embodiments, each CSI / PMI report includes at least one of the number of non-zero coefficients corresponding to the time unit, a bitmap of the non-zero coefficients corresponding to the time unit, the SCI corresponding to the time unit, a reference co-phase / amplitude (with respect to the first time unit) corresponding to the time unit, and an amplitude / phase coefficient corresponding to the time unit.

[0357] In some embodiments, the CSI / PMI report corresponding to the first time unit may further include at least one of the strongest time unit index, the number of time units, the total number of non-zero coefficients (in the time unit), a bitmap of the non-zero coefficients (in the time unit), reference co-phase / amplitude coefficients corresponding to a subset of time units (excluding the first time unit), SD base / rotation, ..., as well as the CQI, RI, SCI (corresponding to the first time unit).

[0358] In some embodiments, the CSI / PMI report corresponding to the first time unit has a higher priority than the other CSI / PMI reports and the priority of the other CSI / PMI reports may be based on its time unit index. Alternatively, the priority of the other CSI / PMI reports may be based on the same priority level that is lower than the priority of the first time unit.

[0359] In some embodiments, when the CSI feedback is unrelated to the TD / DD base, terminal device 220 transmits the CSI feedback via the first uplink resource. Alternatively, when TD / DD domain compression (or CSI feedback associated with the Doppler / time domain base) is enabled, terminal device 220 transmits the CSI feedback via the second uplink resource. Furthermore, either the first or second uplink resource is one of the PUSCH or PUCCH resources.

[0360] In some embodiments, the at least one configuration for CSI feedback indicates a first uplink resource and a second uplink resource.

[0361] In some embodiments, for CSI reporting for high / medium speed, terminal device 220 may report an indication of the DD / TD base type or the presence or absence of DD / TD compression, and the PUCCH resource ID and / or the size of the PUCCH / PUSCH time / frequency resource may depend on the indication. Specifically, a first size of the PUCCH / PUSCH time / frequency resource applied in the case of a first DD / TD base type or no DD / TD compression hypothesis may be smaller than a second size of the PUCCH / PUSCH time / frequency resource applied in the case of a second DD / TD base type or application of DD / TD compression.

[0362] In some embodiments, terminal device 220 transmits a first portion of the parameters on a channel of a first type and a second portion of the parameters on a channel of a second type.

[0363] In some embodiments, for CSI reporting for high speed / medium speed, a subset of PMI or a subset of CSI for high speed / medium speed may be reported on the PUCCH resource. In some embodiments, the subset of PMI information or the subset of CSI information may include at least one of CSI Part 1, Group 0 of CSI Part 2. Furthermore, in some embodiments, the subset of PMI information or the subset of CSI information may include at least one of an SD base indication, an SD rotation indication, a number of time unit indexes, a DD / TD length value, a number of DD / TD bases, an RI, an FD base indication, an indication of DD / TD base type, or presence or absence of DD / TD compression.

[0364] Furthermore, in some embodiments, other PMI information or other subsets of CSI information may be reported in the PUSCH, and the CSI report for high speed / medium speed carried in the PUSCH may be calculated based on the latest CSI report for high speed / medium speed carried in the PUCCH (e.g., PUCCH format 3 or 4).

[0365] Alternatively, all PMI information, or the entire CSI information for high speed / medium speed, may be reported on the PUSCH.

[0366] In some embodiments, a first CSI report carrying CSI information for high / medium speed (or CSI feedback having time-domain channel characteristics (TDCP) measured based on DD / TD-based or tracking RS (TRS), or CSI feedback having Doppler information) may have a higher priority than either a second CSI report that does not carry CSI information for high / medium speed, or a third CSI report that carries L1-RSRP or L1-SINR (periodic, semi-persistent, aperiodic).

[0367] In some embodiments, when terminal device 220m is configured / instructed to report a first CSI report for high / medium speed (or a first CSI report having time-domain channel characteristics (TDCP) measured based on DD / TD-based or tracking RS (TRS), or a first CSI report having Doppler information), if the time / frequency resources for the first CSI and the time / frequency resources for the second CSI collide or overlap, terminal device 220m may not report a second CSI report that does not carry CSI information for high / medium speed. Example of how to

[0368] 6 illustrates a flowchart of an exemplary method 600 according to some embodiments of the present disclosure. For example, the method 600 may be implemented in the terminal device 220 illustrated in FIG.

[0369] At block 610, terminal device 220 receives at least one configuration for CSI feedback from network device 210.

[0370] At block 620, terminal device 220 transmits CSI feedback to network device 210 based on the at least one configuration. The CSI feedback includes multiple partitions having different omission priorities, and the multiple partitions include parameters associating multiple first vectors, multiple second vectors, and multiple third vectors.

[0371] In some embodiments, terminal device 220 determines priorities including at least one of a first priority for a respective first vector among the plurality of first vectors, a second priority for a respective second vector among the plurality of second vectors, a third priority for a respective third vector among the plurality of third vectors, and a fourth priority for a respective parameter among the parameters included in the CSI feedback. Terminal device 220 further includes the parameters in the plurality of partitions of the CSI feedback based on the priorities.

[0372] In some embodiments, terminal device 220 determines the priority based at least in part on the index of the third vector.

[0373] In some embodiments, terminal device 220 prioritizes parameters associated with a primary vector that is one of a primary first vector, a primary second vector, and a primary third vector.

[0374] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with a first set of first vectors, including a primary first vector.

[0375] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with a first set of second vectors, including a primary second vector.

[0376] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with a first set of third vectors, including a primary third vector.

[0377] In some embodiments, the primary vector corresponds to the strongest coefficient.

[0378] Alternatively or additionally, in some embodiments, the primary vector corresponds to the strongest amplitude coefficient.

[0379] Alternatively or additionally, in some embodiments, the primary vector corresponds to the maximum power.

[0380] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and the first partition is configured to have a higher skip priority than the second partition. The first partition indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0381] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and a payload size of the second partition is based on at least one indication in the first partition, wherein the first partition indicates at least one of an indication indicating whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, and a number of the plurality of third vectors.

[0382] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition includes a plurality of information groups, and a first information group of the plurality of information groups is configured to have a higher skip priority than other information groups of the plurality of information groups. The first information group indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0383] In some embodiments, the first information group of the second partition indicates the strongest coefficients for the layer corresponding to the primary vector.

[0384] In some embodiments, other information groups of the plurality of information groups indicate non-zero coefficient information, where the non-zero coefficient information indicates at least one of a bitmap indicating the non-zero coefficients, an amplitude coefficient corresponding to the non-zero coefficients, and a phase coefficient corresponding to the non-zero coefficients, and the non-zero coefficients are associated with one of a primary first vector, a primary second vector, a primary third vector, a subset of the plurality of first vectors including or excluding the primary first vector, a subset of the plurality of second vectors including or excluding the primary second vector, a subset of the plurality of third vectors including or excluding the primary third vector, a plurality of first vectors, a plurality of second vectors, or a plurality of third vectors.

[0385] In some embodiments, other information groups of the plurality of information groups include a second information group and a third information group having a lower priority than the second information group, the second information group indicating first non-zero coefficient information corresponding to non-zero coefficients having a higher priority, and the third information group indicating second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

[0386] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0387] In some embodiments, the CSI feedback includes a plurality of CSI reports, each of the plurality of CSI reports corresponding to a respective time unit of the plurality of time units.

[0388] In some embodiments, each CSI report indicates at least one of at least one amplitude coefficient corresponding to the respective time unit, at least one phase coefficient corresponding to the respective time unit, the number of non-zero coefficients corresponding to the respective time unit, a bitmap of the non-zero coefficients, and the strongest coefficient for the layer corresponding to the respective resource.

[0389] In some embodiments, when a CSI report among the plurality of CSI reports corresponds to a first time unit among the plurality of time units, the CSI report indicates at least one of an RI, a CQI, an index of the time unit corresponding to the strongest amplitude coefficient, and a number of the plurality of time units.

[0390] In some embodiments, terminal device 220 transmits a first portion of the parameters on a channel of a first type and a second portion of the parameters on a channel of a second type.

[0391] In some embodiments, the CSI feedback is set to have a higher priority than another CSI feedback that is independent of the third vector.

[0392] In some embodiments, the first vector is FD-based, the second vector is SD-based, and the third vector is DD-based.

[0393] 7 illustrates a flowchart of an example method 700 according to some embodiments of the present disclosure. For example, the method 700 may be implemented in the network device 210 illustrated in FIG.

[0394] At block 710, network device 210 transmits at least one configuration for CSI feedback to terminal device 220.

[0395] At block 720, network device 210 receives CSI feedback from terminal device 220 based on at least one configuration, where the CSI feedback includes multiple partitions having different omission priorities, and the multiple partitions include parameters associated with multiple first vectors, multiple second vectors, and multiple third vectors.

[0396] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and the first partition is configured to have a higher skip priority than the second partition. The first partition indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0397] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and a payload size of the second partition is based on at least one indication in the first partition, wherein the first partition indicates at least one of an indication indicating whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, and a number of the plurality of third vectors.

[0398] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition includes a plurality of information groups, and a first information group of the plurality of information groups is configured to have a higher skip priority than other information groups of the plurality of information groups. The first information group indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0399] In some embodiments, the first information group of the second partition indicates the strongest coefficients for the layer corresponding to the primary vector.

[0400] In some embodiments, other information groups of the plurality of information groups indicate non-zero coefficient information, where the non-zero coefficient information indicates at least one of a bitmap indicating the non-zero coefficients, an amplitude coefficient corresponding to the non-zero coefficients, and a phase coefficient corresponding to the non-zero coefficients, and the non-zero coefficients are associated with one of a primary first vector, a primary second vector, a primary third vector, a subset of the plurality of first vectors including or excluding the primary first vector, a subset of the plurality of second vectors including or excluding the primary second vector, a subset of the plurality of third vectors including or excluding the primary third vector, a plurality of first vectors, a plurality of second vectors, or a plurality of third vectors.

[0401] In some embodiments, other information groups of the plurality of information groups include a second information group and a third information group having a lower priority than the second information group, the second information group indicating first non-zero coefficient information corresponding to non-zero coefficients having a higher priority, and the third information group indicating second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

[0402] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0403] In some embodiments, the CSI feedback includes a plurality of CSI reports, each of the plurality of CSI reports corresponding to a respective time unit of the plurality of time units.

[0404] In some embodiments, each CSI report indicates at least one of at least one amplitude coefficient corresponding to the respective time unit, at least one phase coefficient corresponding to the respective time unit, the number of non-zero coefficients corresponding to the respective time unit, a bitmap of the non-zero coefficients, and the strongest coefficient for the layer corresponding to the respective resource.

[0405] In some embodiments, when a CSI report among the plurality of CSI reports corresponds to a first time unit among the plurality of time units, the CSI report indicates at least one of an RI, a CQI, an index of the time unit corresponding to the strongest amplitude coefficient, and a number of the plurality of time units.

[0406] In some embodiments, the first vector is FD-based, the second vector is SD-based, and the third vector is DD-based.

[0407] Examples of APPARATUS and DEVICE 8 is a simplified block diagram of an apparatus 800 suitable for implementing embodiments of the present disclosure. Apparatus 800 may be considered another exemplary implementation of terminal device 220 or network device 210 shown in FIG. 2. Thus, apparatus 800 may be implemented in, or as, at least a portion of terminal device 220 or network device 210.

[0408] As shown, the apparatus 800 comprises a processor 810, a memory 820 coupled to the processor 810, a suitable transmitter (TX) / receiver (RX) 840 coupled to the processor 810, and a communication interface coupled to the TX / RX 840. The memory 810 stores at least a portion of a program 830. The TX / RX 840 is for bidirectional communication. The TX / RX 840 has at least one antenna to facilitate communication, although in practice the access nodes referred to herein may have multiple antennas. The communication interface may represent any interface required for communication with other network elements, such as an X2 / Xn interface for bidirectional communication between eNBs / gNBs, an S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and an eNB / gNB, an Un interface for communication between an eNB / gNB and a relay node (RN), or a Uu interface for communication between an eNB / gNB and a terminal device.

[0409] The program 830 is assumed to include program instructions that, when executed by an associated processor 810, enable the device 800 to operate in accordance with embodiments of the present disclosure, as described herein with reference to Figures 2-7. The embodiments herein may be implemented by computer software executable by the processor 810 of the device 800, by hardware, or by a combination of software and hardware. The processor 810 may be configured to implement various embodiments of the present disclosure. Furthermore, the combination of the processor 810 and the memory 820 may form a processing means 880 suitable for implementing various embodiments of the present disclosure.

[0410] Memory 820 may be of any type suitable for a local technology network and may be implemented using any suitable data storage technology, including, by way of non-limiting example, non-transitory computer-readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. While only one memory 820 is shown in device 800, device 800 may have multiple physically distinct memory modules. Processor 810 may be of any type suitable for a local technology network and may include, by way of non-limiting example, one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. Device 800 may have multiple processors, such as application-specific integrated circuit chips, time-slaved to a clock that synchronizes the main processor.

[0411] In some embodiments, terminal device 220 comprises circuitry that is configured.

[0412] In some embodiments, terminal device 220 comprises circuitry configured to receive at least one configuration for channel state information (CSI) feedback from network device 210 and to transmit CSI feedback to network device 210 based on the at least one configuration. The CSI feedback includes multiple partitions having different omission priorities, and the multiple partitions include parameters associated with multiple first vectors, multiple second vectors, and multiple third vectors.

[0413] In some embodiments, the circuitry is further configured to determine priorities including at least one of: a first priority for a respective first vector among the plurality of first vectors, a second priority for a respective second vector among the plurality of second vectors, a third priority for a respective third vector among the plurality of third vectors, and a fourth priority for a respective parameter among the plurality of parameters included in the CSI feedback, and the circuitry is further configured to include the parameter in the plurality of partitions of the CSI feedback based on the priorities.

[0414] In some embodiments, the circuitry is further configured to determine the priority based at least in part on an index of the third vector.

[0415] In some embodiments, the circuitry is further configured to prioritize a parameter associated with the primary vector, the primary vector being one of the primary first vector, the primary second vector, and the primary third vector.

[0416] Alternatively or additionally, in some embodiments, the circuitry is further configured to prioritize parameters associated with the first set of first vectors, including the primary first vector.

[0417] Alternatively or additionally, in some embodiments, the circuitry is further configured to prioritize parameters associated with the first set of second vectors, including the primary second vector.

[0418] Alternatively or additionally, in some embodiments, the circuitry is further configured to prioritize parameters associated with the first set of third vectors, including the primary third vector.

[0419] In some embodiments, the primary vector corresponds to the strongest coefficient.

[0420] Alternatively or additionally, in some embodiments, the primary vector corresponds to the strongest amplitude coefficient.

[0421] Alternatively or additionally, in some embodiments, the primary vector corresponds to the maximum power.

[0422] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and the first partition is configured to have a higher skip priority than the second partition. The first partition indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0423] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and a payload size of the second partition is based on at least one indication in the first partition, wherein the first partition indicates at least one of an indication indicating whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, and a number of the plurality of third vectors.

[0424] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition includes a plurality of information groups, and a first information group of the plurality of information groups is set with a higher skip priority than other information groups of the plurality of information groups. The first information group indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0425] In some embodiments, the first information group of the second partition indicates the strongest coefficients for the layer corresponding to the primary vector.

[0426] In some embodiments, other information groups of the plurality of information groups indicate non-zero coefficient information, where the non-zero coefficient information indicates at least one of a bitmap indicating the non-zero coefficients, an amplitude coefficient corresponding to the non-zero coefficients, and a phase coefficient corresponding to the non-zero coefficients, and the non-zero coefficients are associated with one of a primary first vector, a primary second vector, a primary third vector, a subset of the plurality of first vectors including or excluding the primary first vector, a subset of the plurality of second vectors including or excluding the primary second vector, a subset of the plurality of third vectors including or excluding the primary third vector, a plurality of first vectors, a plurality of second vectors, or a plurality of third vectors.

[0427] In some embodiments, other information groups of the plurality of information groups include a second information group and a third information group having a lower priority than the second information group, the second information group indicating first non-zero coefficient information corresponding to non-zero coefficients having a higher priority, and the third information group indicating second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

[0428] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0429] In some embodiments, the CSI feedback includes a plurality of CSI reports, each of the plurality of CSI reports corresponding to a respective time unit of the plurality of time units.

[0430] In some embodiments, each CSI report indicates at least one of at least one amplitude coefficient corresponding to the respective time unit, at least one phase coefficient corresponding to the respective time unit, the number of non-zero coefficients corresponding to the respective time unit, a bitmap of the non-zero coefficients, and the strongest coefficient for the layer corresponding to the respective resource.

[0431] In some embodiments, when a CSI report among the plurality of CSI reports corresponds to a first time unit among the plurality of time units, the CSI report indicates at least one of an RI, a CQI, an index of the time unit corresponding to the strongest amplitude coefficient, and a number of the plurality of time units.

[0432] In some embodiments, the circuitry is further configured to transmit a first portion of the parameters on a channel of a first type and a second portion of the parameters on a channel of a second type.

[0433] In some embodiments, the CSI feedback is set to have a higher priority than another CSI feedback that is independent of the third vector.

[0434] In some embodiments, the first vector is FD-based, the second vector is SD-based, and the third vector is DD-based.

[0435] In some embodiments, network device 210 comprises circuitry configured to send at least one configuration for CSI feedback to terminal device 220 and receive CSI feedback from terminal device 220 based on the at least one configuration. The CSI feedback includes multiple partitions having different omission priorities, and the multiple partitions include parameters associated with multiple first vectors, multiple second vectors, and multiple third vectors.

[0436] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and the first partition is configured to have a higher skip priority than the second partition. The first partition indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0437] In some embodiments, the plurality of partitions includes at least a first partition and a second partition, and a payload size of the second partition is based on at least one indication in the first partition, wherein the first partition indicates at least one of an indication indicating whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, and a number of the plurality of third vectors.

[0438] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition includes a plurality of information groups, and a first information group of the plurality of information groups is configured to have a higher skip priority than other information groups of the plurality of information groups. The first information group indicates at least one of an indication of whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, an index of a primary base, a total number of non-zero coefficients, a length of the plurality of third vectors, or a number of the plurality of third vectors.

[0439] In some embodiments, the first information group of the second partition indicates the strongest coefficients for the layer corresponding to the primary vector.

[0440] In some embodiments, other information groups of the plurality of information groups indicate non-zero coefficient information, where the non-zero coefficient information indicates at least one of a bitmap indicating the non-zero coefficients, an amplitude coefficient corresponding to the non-zero coefficients, and a phase coefficient corresponding to the non-zero coefficients, and the non-zero coefficients are associated with one of a primary first vector, a primary second vector, a primary third vector, a subset of the plurality of first vectors including or excluding the primary first vector, a subset of the plurality of second vectors including or excluding the primary second vector, a subset of the plurality of third vectors including or excluding the primary third vector, a plurality of first vectors, a plurality of second vectors, or a plurality of third vectors.

[0441] In some embodiments, other information groups of the plurality of information groups include a second information group and a third information group having a lower priority than the second information group, the second information group indicating first non-zero coefficient information corresponding to non-zero coefficients having a higher priority, and the third information group indicating second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

[0442] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0443] In some embodiments, the CSI feedback includes a plurality of CSI reports, each of the plurality of CSI reports corresponding to a respective time unit of the plurality of time units.

[0444] In some embodiments, each CSI report indicates at least one of at least one amplitude coefficient corresponding to the respective time unit, at least one phase coefficient corresponding to the respective time unit, the number of non-zero coefficients corresponding to the respective time unit, a bitmap of the non-zero coefficients, and the strongest coefficient for the layer corresponding to the respective resource.

[0445] In some embodiments, when a CSI report among the plurality of CSI reports corresponds to a first time unit among the plurality of time units, the CSI report indicates at least one of an RI, a CQI, an index of the time unit corresponding to the strongest amplitude coefficient, and a number of the plurality of time units.

[0446] In some embodiments, the first vector is FD-based, the second vector is SD-based, and the third vector is DD-based.

[0447] As used herein, the term "circuit" may refer to a hardware circuit and / or a combination of a hardware circuit and software. For example, a circuit may be a combination of analog and / or digital hardware circuitry and software / firmware. As another example, a circuit may be any portion of a hardware processor with software, where the hardware processor includes digital signal processor(s), software, and memory(s) that cooperate to enable a device, such as a terminal device or network device, to operate to perform various functions. As yet another example, a circuit may be a hardware circuit and / or processor, such as a microprocessor or portion of a microprocessor, that requires software / firmware for operation, but the software may be absent when not necessary for operation. As used herein, the term circuit also includes simply a hardware circuit or processor(s) or portion of a hardware circuit or processor(s) and its (or their) associated software and / or firmware implementation.

[0448] In summary, the embodiments of the present disclosure provide the following solutions:

[0449] In one solution, a communication method includes, in a terminal device, receiving at least one configuration for CSI feedback from a network device; and transmitting CSI feedback to the network device based on the at least one configuration, the CSI feedback including a plurality of partitions having different omission priorities, the plurality of partitions including parameters associated with a plurality of first vectors, a plurality of second vectors, and a plurality of third vectors.

[0450] In some embodiments, transmitting the CSI feedback includes determining priorities including at least one of: a respective first priority for a first vector among the plurality of first vectors; a respective second priority for a second vector among the plurality of second vectors; a respective third priority for a third vector among the plurality of third vectors; and a respective fourth priority for a parameter among the plurality of parameters included in the CSI feedback; and generating the CSI feedback by including the parameters in multiple partitions of the CSI feedback based on the priorities.

[0451] In some embodiments, determining the priority includes determining the priority based at least in part on an index of the third vector.

[0452] In some embodiments, determining the priority includes prioritizing parameters associated with at least one of a primary vector, which is one of a primary first vector, a primary second vector, and a primary third vector, a first set of first vectors that include the primary first vector, a first set of second vectors that include the primary second vector, and a first set of third vectors that include the primary third vector.

[0453] In some embodiments, the primary vector corresponds to one of the strongest coefficient, the strongest amplitude coefficient, or the maximum power.

[0454] In some embodiments, the plurality of partitions include at least a first partition and a second partition, wherein the first partition is configured to have a higher skipping priority than the second partition; a payload size of the second partition is based on at least one indication in the first partition; or the second partition includes a plurality of information groups, wherein a first information group of the plurality of information groups is configured to have a higher skipping priority than other information groups of the plurality of information groups; and one of the first partition and the first information group of the second partition indicates at least one of an indication indicating whether CSI feedback is associated with a third vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to a primary vector, a primary base index, a total number of non-zero coefficients, a length of the plurality of third vectors, and a number of the plurality of third vectors.

[0455] In some embodiments, the first information group of the second partition indicates the strongest coefficients for the layer corresponding to the primary vector.

[0456] In some embodiments, other information groups of the plurality of information groups indicate non-zero coefficient information, the non-zero coefficient information indicating at least one of a bitmap indicating the non-zero coefficients, amplitude coefficients corresponding to the non-zero coefficients, and phase coefficients corresponding to the non-zero coefficients, and the non-zero coefficients are associated with one of a primary first vector, a primary second vector, a primary third vector, a subset of the plurality of first vectors including or excluding the primary first vector, a subset of the plurality of second vectors including or excluding the primary second vector, a subset of the plurality of third vectors including or excluding the primary third vector, a plurality of first vectors, a plurality of second vectors, or a plurality of third vectors.

[0457] In some embodiments, other information groups of the plurality of information groups include a second information group and a third information group having a lower priority than the second information group, the second information group indicating first non-zero coefficient information corresponding to non-zero coefficients having a higher priority, and the third information group indicating second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

[0458] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0459] In some embodiments, the CSI feedback includes a plurality of CSI reports, each of the plurality of CSI reports corresponding to a respective time unit of the plurality of time units.

[0460] In some embodiments, each CSI report indicates at least one of at least one amplitude coefficient corresponding to the respective time unit, at least one phase coefficient corresponding to the respective time unit, the number of non-zero coefficients corresponding to the respective time unit, a bitmap of the non-zero coefficients, and the strongest coefficient for the layer corresponding to the respective resource.

[0461] In some embodiments, when a CSI report among the plurality of CSI reports corresponds to a first time unit among the plurality of time units, the CSI report indicates at least one of an RI, a CQI, an index of the time unit corresponding to the strongest amplitude coefficient, and a number of the plurality of time units.

[0462] In some embodiments, transmitting the CSI feedback to the network device includes transmitting a first portion of the parameters on a channel of a first type and transmitting a second portion of the parameters on a channel of a second type.

[0463] In some embodiments, the CSI feedback is set to have a higher priority than another CSI feedback that is independent of the third vector.

[0464] In some embodiments, the first vector is FD-based, the second vector is SD-based, and the third vector is DD-based.

[0465] In another solution, a communication method includes, in a network device, transmitting at least one configuration for CSI feedback to a terminal device; and receiving CSI feedback from the terminal device based on the at least one configuration, wherein the CSI feedback includes a plurality of partitions having different omission priorities, and the plurality of partitions include parameters associated with a plurality of first vectors, a plurality of second vectors, and a plurality of third vectors.

[0466] In some embodiments, the plurality of partitions include at least a first partition and a second partition, wherein the first partition is configured to have a higher skip priority than the second partition, and a payload size of the second partition is based on at least one indication in the first partition; or the second partition includes a plurality of information groups, wherein a first information group of the plurality of information groups is configured to have a higher skip priority than other information groups of the plurality of information groups, and one of the first partition and the first information group of the second partition indicates at least one of an indication indicating whether CSI feedback is associated with the first vector or whether DD compression is enabled, a CQI set corresponding to a particular time unit, an index of the particular time unit, a first number of non-zero coefficients corresponding to the primary vector, a primary base index, a total number of non-zero coefficients, a length of the plurality of third vectors, or the number of the plurality of third vectors.

[0467] In some embodiments, the first information group of the second partition indicates the strongest coefficients for the layer corresponding to the primary vector.

[0468] In some embodiments, another information group of the plurality of information groups indicates non-zero coefficient information, where the non-zero coefficient information indicates at least one of a bitmap indicating the non-zero coefficients, amplitude coefficients corresponding to the non-zero coefficients, and phase coefficients corresponding to the non-zero coefficients, and the non-zero coefficients are associated with one of a plurality of first vectors, a plurality of second vectors, a plurality of third vectors, a primary first vector, a primary second vector, a primary third vector, a plurality of first vectors including or excluding the primary first vector, a plurality of second vectors including or excluding the primary second vector, and a plurality of third vectors including or excluding the primary third vector, associated with CSI feedback.

[0469] In some embodiments, other information groups of the plurality of information groups include a second information group and a third information group having a lower priority than the second information group, the second information group indicating first non-zero coefficient information corresponding to non-zero coefficients having a higher priority, and the third information group indicating second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

[0470] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0471] In some embodiments, the CSI feedback includes a plurality of CSI reports, each of the plurality of CSI reports corresponding to a respective time unit of the plurality of time units.

[0472] In some embodiments, each CSI report indicates at least one of at least one amplitude coefficient corresponding to the respective time unit, at least one phase coefficient corresponding to the respective time unit, the number of non-zero coefficients corresponding to the respective time unit, a bitmap of the non-zero coefficients, and the strongest coefficient for the layer corresponding to the respective resource.

[0473] In some embodiments, when a CSI report among the plurality of CSI reports corresponds to a first time unit among the plurality of time units, the CSI report indicates at least one of an RI, a CQI, an index of the time unit corresponding to the strongest amplitude coefficient, and a number of the plurality of time units.

[0474] In some embodiments, the first vector is FD-based, the second vector is SD-based, and the third vector is DD-based.

[0475] In another solution, a communications device comprises a processor configured to cause the device to perform any of the above methods.

[0476] In general, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described using block diagrams, flowcharts, or some other pictorial representations, it should be understood that the blocks, devices, systems, techniques, or methods described herein may be implemented in, by way of non-limiting example, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller, or other computing device, or some combination thereof.

[0477] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions (e.g., computer-executable instructions included in program modules) that execute on a target real or virtual processor device to perform the processes or methods described above with reference to FIGS. 2-6. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split among program modules as desired in various embodiments. The machine-executable instructions for the program modules may be executed in local or distributed devices. In a distributed device, the program modules may be located in both local and remote storage media.

[0478] Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, so that when executed by the processor or controller, the program code performs the functions / acts specified in the flowcharts and / or block diagrams. The program code may be executed entirely on a machine, partially on a machine, as a stand-alone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0479] The program code may be embodied in a machine-readable medium, which may be any tangible medium that can contain or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium includes, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination thereof. More specific examples of machine-readable storage media include an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a CD-ROM (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0480] Furthermore, while operations are depicted in a particular order, this should not be understood as requiring such operations to be performed in the particular order shown, or sequentially, or that all of the illustrated operations be performed, to achieve desirable results. In certain situations, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above description, these should not be construed as limiting the scope of the disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

[0481] Although the present disclosure has been described in language specific to structural features and / or methodological operations, it is to be understood that the present disclosure, which is limited to the appended claims, is not necessarily limited to the specific features or operations described above. Rather, the specific features and operations described above are disclosed as example forms of implementing the claims.

Claims

1. receiving, at a terminal device, at least one configuration for channel state information (CSI) feedback from a network device; transmitting the CSI feedback including a plurality of partitions having different omission priorities to the network device based on the at least one configuration; The plurality of partitions are: a plurality of first vectors; a plurality of second vectors; a plurality of third vectors; A communication method, including parameters to associate with the

2. a respective first priority for a first vector of the plurality of first vectors; a respective second priority for a second vector among the plurality of second vectors; a respective third priority for a third vector among the plurality of third vectors; and a fourth priority for each of the parameters included in the CSI feedback; determining a priority including at least one of: generating the CSI feedback based on the priority; and The method of claim 1 further comprising:

3. determining the priority The method of claim 2 , comprising determining the priority based at least in part on an index of a third vector.

4. determining the priority a primary vector, the primary vector being one of a primary first vector, a primary second vector, and a primary third vector; a first set of first vectors including the primary first vector; a first set of second vectors including the primary second vector; a first set of third vectors including the primary third vector; The method of claim 2 , further comprising prioritizing a parameter associated with at least one of:

5. The method of claim 4 , wherein the primary vector corresponds to one of the strongest coefficient, the strongest amplitude coefficient, or the maximum power.

6. the plurality of partitions include at least a first partition and a second partition; the first partition is set to have a higher skip priority than the second partition; the payload size of the second partition is based on at least one indication in the first partition; or the second partition includes a plurality of information groups, and a first information group among the plurality of information groups is set to have a higher skip priority than other information groups among the plurality of information groups; One of the first information group of the second partition and the first partition is an indication of whether the CSI feedback is associated with a third vector or whether Doppler domain (DD) compression is enabled; a channel quality indicator (CQI) set corresponding to a particular time unit; the index of the particular time unit; a first number of non-zero coefficients corresponding to the primary vector; said primary-based index; the total number of non-zero coefficients, the lengths of the plurality of third vectors; and the number of the plurality of third vectors; The method of claim 1 , wherein the at least one of

7. The method of claim 6 , wherein the first information group of the second partition indicates strongest coefficients for a layer corresponding to the primary vector.

8. Another information group of the plurality of information groups indicates non-zero coefficient information, and the non-zero coefficient information is Primary first vector, Primary Secondary Vector, Primary Tertiary Vector, a subset of the plurality of first vectors, including or excluding the primary first vector; a subset of the plurality of second vectors, including or excluding the primary second vector; a subset of the plurality of third vectors, including or excluding the primary third vector; the plurality of first vectors; the plurality of second vectors; or the plurality of third vectors; a bitmap indicating the non-zero coefficients associated with one of an amplitude coefficient corresponding to the non-zero coefficient; and a phase coefficient corresponding to the non-zero coefficient; The method of claim 6 , wherein the method exhibits at least one of:

9. other information groups of the plurality of information groups include a second information group and a third information group having a lower priority than the second information group; the second information group indicates first non-zero coefficient information corresponding to a non-zero coefficient having a higher priority; The method of claim 8 , wherein the third group of information indicates second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

10. The method of claim 6 , wherein the number of information groups in the plurality of information groups is greater than or equal to three.

11. The method of claim 1 , wherein the CSI feedback includes a plurality of CSI reports, each of the plurality of CSI reports corresponding to a respective time unit of a plurality of time units.

12. Each CSI report: at least one amplitude coefficient corresponding to each said time unit; at least one phase coefficient corresponding to each said time unit; the number of non-zero coefficients corresponding to each said time unit; a bitmap of the non-zero coefficients; and The strongest coefficient for each resource layer, The method of claim 11 , wherein the at least one of

13. When a CSI report of the plurality of CSI reports corresponds to a first time unit of the plurality of time units, the CSI report Rank Indicator (RI), Channel Quality Indicator (CQI), the index of the time unit corresponding to the strongest amplitude coefficient; and the number of time units in the plurality of time units; The method of claim 11 , wherein the at least one of

14. transmitting the CSI feedback to the network device, transmitting a first portion of the parameters over a channel of a first type; transmitting a second portion of the parameters on a channel of a second type; The method of claim 1 , comprising:

15. The method of claim 1 , wherein the CSI feedback is set to have a higher priority than another CSI feedback that is independent of a third vector.

16. 2. The method of claim 1, wherein the first vector is frequency domain (FD) based, the second vector is spatial domain (SD) based, and the third vector is Doppler domain (DD) based.

17. In the network device, transmitting at least one configuration for channel state information (CSI) feedback to the terminal device; receiving, from the terminal device, the CSI feedback including a plurality of partitions having different omission priorities based on the at least one configuration; The plurality of partitions are: a plurality of first vectors; a plurality of second vectors; a plurality of third vectors; A communication method, including parameters to associate with the

18. the plurality of partitions include at least a first partition and a second partition; the first partition is set to have a higher skip priority than the second partition; the payload size of the second partition is based on at least one indication in the first partition; or the second partition includes a plurality of information groups, and a first information group among the plurality of information groups is set to have a higher skip priority than other information groups among the plurality of information groups; One of the first information group of the second partition and the first partition is an indication of whether the CSI feedback is associated with a third vector or whether Doppler domain (DD) compression is enabled; a channel quality indicator (CQI) set corresponding to a particular time unit; the index of the particular time unit; a first number of non-zero coefficients corresponding to the primary vector; said primary-based index; the total number of non-zero coefficients, the lengths of the plurality of third vectors; and the number of the plurality of third vectors; The method of claim 11 , wherein the at least one of

19. 20. The method of claim 18, wherein the first information group of the second partition indicates strongest coefficients for a layer corresponding to the primary vector.

20. Another information group of the plurality of information groups indicates non-zero coefficient information, and the non-zero coefficient information is Primary first vector, Primary Secondary Vector, Primary Tertiary Vector, a subset of the plurality of first vectors, including or excluding the primary first vector; a subset of the plurality of second vectors, including or excluding the primary second vector; a subset of the plurality of third vectors, including or excluding the primary third vector; the plurality of first vectors; the plurality of second vectors; or the plurality of third vectors; a bitmap indicating the non-zero coefficients associated with one of an amplitude coefficient corresponding to the non-zero coefficient; and a phase coefficient corresponding to the non-zero coefficient; 20. The method of claim 18, wherein the method exhibits at least one of:

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