Terminal device, network device and method

Abstract

An exemplary embodiment of the present disclosure relates to an effective mechanism for processing CSI reports. 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 includes multiple partitions with different omission priorities, and the multiple partitions include parameters associated with one or more CSI-RS assignments among multiple CSI-Reference Signal (RS) assignments. In this way, priority rules for reporting parameters can be updated to adapt to scenarios in which multiple TRPs are supported.

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 a terminal device and a network device, the terminal device needs to report CSI feedback to the network device so that the network device can understand the network status and make more appropriate subsequent scheduling. Furthermore, it is expected that transmission via multiple transmission reception points (TRPs) (also called multi-TRP transmission) will be supported. In the case of multi-TRP transmission, the number of parameters to be reported to the network device increases compared to a single TRP transmission. Therefore, it is desirable to further study how to efficiently transmit CSI feedback with more parameters to the network. Summary of the Invention

[0004] Embodiments of the present disclosure generally provide a method, an apparatus, and a computer storage medium for configuring and transmitting CSI feedback.

[0005] In a first aspect, there is provided a communication method performed by a terminal device, the method including: receiving, in the terminal device, 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 one or more CSI-Reference Signal (RS) allocations among a plurality of CSI-RS allocations.

[0006] In a second aspect, there is provided a communication method performed by a network device, the method including: transmitting, in the network device, 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, the CSI feedback including a plurality of partitions having different omission priorities, the plurality of partitions including parameters associated with one or more CSI-Reference Signal (RS) allocations among a plurality of CSI-RS allocations.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] Other features of the present disclosure will become readily apparent from the following description. [Brief explanation of the drawings]

[0011] 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.

[0012] [Figure 1] 1 illustrates an exemplary block diagram of a CSI report according to a conventional solution. [Figure 2A] 1 illustrates an exemplary communication environment in which exemplary embodiments of the present disclosure may be implemented. [Figure 2B] 1 illustrates another exemplary communication environment in which exemplary embodiments of the present disclosure may be implemented. [Figure 2C] Schematic diagrams of spatial domain, frequency domain and Doppler / time domain bases are shown. [Figure 3] 1 shows a signaling chart illustrating a process of communication according to some embodiments of the present disclosure. [Figure 4A] 1 illustrates an example block diagram of CSI feedback according to some embodiments of the present disclosure. [Figure 4B] 1 illustrates an example block diagram of CSI feedback according to some embodiments of the present disclosure. [Figure 5] 1 illustrates an exemplary method performed by a terminal device according to some embodiments of the present disclosure. [Figure 6] 1 illustrates an exemplary method performed by a network device according to some embodiments of the present disclosure. [Figure 7] 1 shows a schematic block diagram of an apparatus suitable for implementing exemplary embodiments of the present disclosure.

[0013] Throughout the drawings, the same or similar reference numbers represent the same or similar elements. DETAILED DESCRIPTION OF THE INVENTION

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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).

[0018] 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.

[0019] 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.

[0020] Embodiments of the present disclosure may be implemented in test equipment such as, for example, a signal generator, a signal analyzer, a spectrum analyzer, a network analyzer, a test terminal equipment, a test network equipment, a channel emulator, and the like.

[0021] In some embodiments, a terminal device 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 to the terminal device from at least one of the first network device and the second network 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 directly or via the first network device to the terminal device. In some embodiments, information related to a configuration of the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information relating 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 considered in 3GPP Release 18. CSI extension for high / medium speed and coherent joint transmission (CJT) will be specified, and the maximum number of CSI-RS ports per resource is expected to remain the same as in Release 17, i.e., 32.

[0025] Furthermore, by utilizing time domain (TD) correlation / 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 specified 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 JPEG2025528069000002.jpg83168

[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 JPEG2025528069000003.jpg103168

[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 the rank indicator field. For example, the number of layers or the value of the RI 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 JPEG2025528069000004.jpg81166

[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 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.

[0037] 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.

[0038] 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.

[0039] In some embodiments, the first subband may correspond to a subband for CQI or a CQI subband or a CSI subband.

[0040] In some embodiments, the size of one first subband or the number of PRBs in one first subband is N PRB SB and N PRB SB is a positive integer. For example, 1≦N PRB SB ≦32. For example, N PRB SB may be at least one of {4, 8, 16, 32}. 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.

[0041] In some embodiments, the at least one parameter for the antenna ports may include at least one of a first plurality of antenna port groups, a number of the first plurality of antenna port groups, a number of antenna ports in an antenna port group, one or more subsets of antenna ports in an antenna port group, a number of antenna ports in a subset of antenna ports, a plurality of antenna ports in a subset of antenna ports, a plurality of antenna ports in an antenna port group, a first parameter of antenna port configuration, and a second parameter of antenna port configuration. For example, 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 at least one configuration may include the first plurality of antenna port groups.

[0042] In some embodiments, the number of the first plurality of antenna port groups (e.g., represented as T1) may be one of {1, 2, 3, 4}, {1, 2, 4}, {2, 3, 4}, or {2, 4}. In some embodiments, the number of the second plurality of antenna port groups (e.g., represented as T1) may be one of {1, 2, 3, 4}, {1, 2, 4}, {2, 3, 4}, or {2, 4}. s , 2, 3, 4}, {1, 2, 4}, {2, 3, 4}, or {2, 4}. In some embodiments, the number T of the second plurality of antenna port groups s is 1≦T s For example, if T1=2, T s may be 1 or 2. In another example, if T1=4, T s can be 1, 2, or 4. In another example, if T1=4, then T s can be 1, 2, 3, or 4. In another example, if T1=4, then T s may be 1 or 4. In another example, if T1=3, then T s can be 1, 2, or 3. In another example, if T1=3, then T s may be 1 or 3.

[0043] In some embodiments, at least one configuration may include multiple antenna ports in an antenna port group. In some embodiments, the number of multiple antenna ports in an antenna port group (e.g., represented as P) may be one of {1, 2, 4, 6, 8, 12, 16}. In some embodiments, the number of antenna ports in each antenna port group 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}.

[0044] In some embodiments, there may be one or more reference signals, and the number of antenna ports for one of the one or more reference signals may be equal to the number of the first plurality of antenna port groups multiplied by the number of the plurality of antenna ports in an antenna port group. In some embodiments, the reference signal may be at least one of a Channel State Information Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), a Demodulation Reference Signal (DMRS), a Tracking CSI-RS, and a Phase Tracking Reference Signal (PTRS). In some embodiments, the number of antenna ports for one of the one or more reference signals (e.g., P tot ) can be a positive integer. For example, P tot can be a positive integer, e.g., 2≦P tot In some embodiments, P tot may be one of {2, 4, 8, 12, 16, 24, 32}. In some embodiments, P tot =P*T1.

[0045] In some embodiments, the terminal device may receive the reference signal based on the number of antenna ports for the reference signal.

[0046] In some embodiments, the index of one antenna port group may be represented as t, where t may be a non-negative integer. For example, 1≦t≦T1. In another example, 0≦t≦T1-1. In another example, 0≦t≦T s -1. In another example, 1≦t≦T s In some embodiments, the antenna port group with index t is P t For example, P t can be a positive integer. For example, P t may be one of {1, 2, 4, 6, 8, 12, 16}. In some embodiments, for different values ​​of t or different antenna port groups with different indices, P t In some embodiments, for each antenna port group, the value of P t The values ​​of P may be the same. t In some embodiments, The file is TIFF2025528069000005.tif1159.

[0047] In some embodiments, the antenna port group with index t is the Nth antenna port. g,t For example, N g,t can be a positive integer, for example, N g,t may be one of {1, 2, 3, 4}. For example, each subset of antenna ports may correspond to a panel or an antenna port of a panel. In some embodiments, for different antenna port groups with different values ​​of t or different indices, N g,t In some embodiments, for each antenna port group, the value of N g,t In some embodiments, each subset of antenna ports has the same value of P t In some embodiments, the antenna ports may include: The file is TIFF2025528069000006.tif963.

[0048] In some embodiments, the value of the first antenna port configuration parameter 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 antenna port configuration parameter 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 antenna port configuration parameter and the second antenna port configuration parameter may be configured in one higher layer parameter.

[0049] In some embodiments, the number of antenna ports in an antenna port group 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 may be determined based on P t =N g,t ·N1·N2·2 or P=N g,t ·N1·N2·2 may also be used.

[0050] In some embodiments, the number of antenna ports in a subset of antenna ports of an antenna port group 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 a subset of antenna ports of an antenna port group may be determined based on P t In some embodiments, the number of antenna ports in an antenna port group may be P t = N1·N2·2 or P = N1·N2·2.

[0051] In some embodiments, the number of antenna ports for the reference signal 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 for the reference signal is determined based on P tot = N1·N2·2, or P tot = T1·N1·N2·2.

[0052] In some embodiments, there may be a parameter "O1." "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, there may be a parameter "O2." "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.

[0053] 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).

[0054] In some embodiments, example settings of (N1, N2) and (O1, O2) and / or P may be at least one of the rows and / or columns in Table 4 below. Table 4. Example settings JPEG2025528069000007.jpg143168

[0055] In some embodiments, N / A may indicate the absence of a value or setting for a parameter.

[0056] In some embodiments, (N g,t , N1, N2) may correspond to one setting of (O1, O2). In some embodiments, one setting of (O1, O2) corresponds to one setting of (N g,t, N1, N2).

[0057] In some embodiments, (N g,t , N1, N2) and (O1, O2) and / or P tot , P t Alternatively, the setting of P may be at least one of the rows and / or columns in Table 5 below. Table 5. Example settings JPEG2025528069000008.jpg86168

[0058] In some embodiments, T1 and / or (N1, N2) and / or (O1, O2) and / or P tot and / or P t Or the setting of P may be at least one of the rows and / or columns in Table 6 below. For example, P t = N1·N2·2 or P=N1·N2·2. Table 6. Example of settings JPEG2025528069000009.jpg160168

[0059] In some embodiments, T1 and / or (N1, N2) and / or (O1, O2) and / or P tot and / or P t Or the setting of P may be at least one of the rows and / or columns in Table 7 below. For example, P tot = N1·N2·2. Table 7. Example of settings JPEG2025528069000010.jpg231161

[0060] In some embodiments, T1 and / or (N1, N2) and / or (O1, O2) and / or P tot and / or P t Or the setting of P may be at least one of the rows and / or columns in Table 8 below. For example, P tot = N1·N2·2. Table 8. Example settings JPEG2025528069000011.jpg164161

[0061] In some embodiments, T1 and / or (N g,t , N1, N2) and / or (O1, O2) and / or P tot and / or P t Or the setting of P may be at least one of the rows and / or columns in Table 9 below. Table 9. Example of settings JPEG2025528069000012.jpg75154

[0062] In some embodiments, the vector μ m In some embodiments, μ m may be a DFT vector. In some embodiments, if N2>1, then TIFF2025528069000013.tif1798. In some embodiments, when N2=2, TIFF2025528069000014.tif1652. In some embodiments, when N2=1, μ m = 1. m may be a non-negative integer. For example, 0≦m≦02N2. In another example, m may be one of {0, 2, 4, 6, 8}. In another example, m may be one of {0, 1, 2, 3}. In another example, m may be 0 or 1. In another example, m may be 0. In some embodiments, the vector v l,m In some embodiments, TIFF2025528069000015.tif21165.

[0063] In some embodiments, when N1=2 and N2=2, TIFF2025528069000016.tif23168. In some embodiments, when N1=4 and N2=1, TIFF2025528069000017.tif23137. In some embodiments, l may be a non-negative integer. For example, 0≦l≦01N1. In another example, l may be one of {0, 2, 4, 6, 8}. In another example, l may be one of {0, 1, 2, 3}. In another example, l may be 0 or 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 configuration. ri r) may be one of {1, 2}, {1, 2, 3, 4}, or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, there may be multiple layers, and each layer may have an index, which may be represented as r, where r may be a non-negative integer. For example, 1≦r≦v ri For example, r is the set of {1, 2, …v ri}, {1, 2}, {1, 2, 3, 4} or {1, 2, 3, 4, 5, 6, 7, 8}.

[0065] In some embodiments, the at least one codebook indicator may include one or more indicators (or fields) for a first plurality of antenna port groups, one or more indicators (or fields) for a second plurality of antenna port groups, one or more indicators (or fields) for a plurality of first vectors, one or more indicators (or fields) for a plurality of second vectors, one or more indicators (or fields) for a first plurality of rotations for the first plurality of vectors, one or more indicators (or fields) for a second plurality of rotations for the second plurality of vectors, one or more indicators (or fields) for a plurality of third vectors, one or more indicators (or fields) for a plurality of TRP indexes (or CSI-RS resource indexes, CSI-RS port group indexes, CSI-RS allocation indexes), The information may include at least one of: one or more indicators (or fields) for the number of third vectors; an indicator (or field) for the strongest coefficient; one or more indicators (or one or more indices, one or more fields) for the first antenna port group; one or more indicators (or fields) for the first amplitude coefficients; one or more indicators (or fields) for the first phase coefficients; one or more indicators (or fields) for the second amplitude coefficients; one or more indicators (or fields) for the second phase coefficients; one or more indicators (or fields) for the third amplitude coefficients; one or more indicators (or fields) for the third phase coefficients; the number of first non-zero coefficients; and one or more indicators (or one or more bitmaps) indicating the non-zero coefficients.

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

[0067] In some embodiments, one or more of the at least one codebook indicator may be the same or may apply to each layer of multiple layers, e.g., layer-common. In some embodiments, one or more of the at least one codebook indicator may correspond to a layer, e.g., with a layer-specific index.

[0068] In some embodiments, one or more indicators (or fields) of the second plurality of antenna port groups may be the same or may apply to each layer of the plurality of layers, e.g., layer-common. In some embodiments, one or more indicators (or fields) of the second plurality of antenna port groups may correspond to a layer, e.g., with a layer-specific index.

[0069] In some embodiments, one or more indicators (or fields) of the first vectors may be the same or may apply to each layer of the multiple layers, e.g., layer-common. In some embodiments, one or more indicators (or fields) of the first vectors may correspond to a layer, e.g., with a layer-specific index.

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

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

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

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

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

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

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

[0077] In some embodiments, one or more indicators (or fields) of the plurality of first phase coefficients may be the same or may apply to each layer of the plurality of layers, e.g., layer-common. In some embodiments, one or more indicators (or fields) of the plurality of first phase coefficients may correspond to a layer, e.g., with a layer-specific index.

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

[0079] In some embodiments, one or more indicators (or fields) of the plurality of second phase coefficients may be the same or may apply to each layer of the plurality of layers, e.g., layer-common. In some embodiments, one or more indicators (or fields) of the plurality of second phase coefficients may correspond to a layer, e.g., with a layer-specific index.

[0080] In some embodiments, one or more indicators (or fields) of the plurality of third amplitude coefficients may correspond to a layer, e.g., with a layer-specific index. In some embodiments, one or more indicators (or fields) of the plurality of third phase coefficients may correspond to a layer, e.g., with a layer-specific index.

[0081] In some embodiments, one or more indicators (or fields) indicating non-zero coefficients may be the same or may apply to each layer of multiple layers, e.g., layer-universal. In some embodiments, one or more indicators (or fields) indicating non-zero coefficients may correspond to a layer, e.g., with a layer-specific index.

[0082] In some embodiments, the first number of non-zero coefficients may be the same or may apply to each layer of multiple layers, e.g., layer-universal. In some embodiments, the first number of non-zero coefficients may correspond to a layer, e.g., a layer-specific index.

[0083] In some embodiments, the number of the plurality of first vectors, the second parameter of the codebook, and the third parameter of the codebook may be set or indicated in a single higher layer parameter, and in some embodiments, the fifth parameter of the codebook and the sixth parameter of the codebook may be set or indicated in a single higher layer parameter.

[0084] In some embodiments, the first parameter of the codebook may be the same as the fourth parameter of the codebook, in some embodiments, the second parameter of the codebook may be the same as the fifth parameter of the codebook, and in some embodiments, the third parameter of the codebook may be the same as the sixth parameter of the codebook.

[0085] In some embodiments, the second parameter of the codebook may be one of {½, ¼, ⅛}. In some embodiments, the third parameter of the codebook may be one of {¼, ½, ¾}. In some embodiments, the number of the plurality of first vectors (e.g., represented as L) may be one of {2, 4, 6} or at least one of {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, 12, 16, 24, 32}. In some embodiments, the number of the plurality of second vectors (e.g., L t The number of L (represented as t may be a positive integer. In some embodiments, L t may be one of {2, 4, 6}.

[0086] In some embodiments, the third parameter of the codebook may be further based on the number of layers. In some embodiments, one upper layer parameter may indicate 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 In some embodiments, one upper layer parameter may indicate L=2 and β=1 / 2, 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 In some embodiments, one upper layer parameter may indicate 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 In some embodiments, one upper layer parameter may indicate L=4 and β=½, and when the number of layers is 1 or 2, pv = 1 / 4, and the number of layers is 3 or 4, p v In some embodiments, one upper layer parameter is L=4, β=3 / 4, and p v In some embodiments, one upper layer parameter may indicate 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 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.

[0087] In some embodiments, one higher layer parameter is L t = 2 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 In some embodiments, one upper layer parameter is L t = 2 and β = 1 / 2, 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 In some embodiments, one upper layer parameter is L t = 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 In some embodiments, one upper layer parameter is L t = 4 and β = 1 / 2, 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 In some embodiments, one upper layer parameter is Lt = 4, β = 3 / 4, and p v In some embodiments, one higher layer parameter may be L t = 4 and β = 1 / 2, 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 In some embodiments, one upper layer parameter is L t = 6, β = 1 / 2, and p v For example, the number of layers is 1 or 2. In some embodiments, one upper layer parameter is L t = 6, β = 3 / 4, and p v = 1 / 4. For example, the number of layers is 1 or 2.

[0088] In some embodiments, the number of the first plurality of vectors may be based on the number of the second plurality of vectors and either the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. t *T1. In some embodiments, L=L t *T s is.

[0089] In some embodiments, the first parameter of 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 of the codebook, the number of the plurality of first subbands. In some embodiments, the first parameter of the codebook may control the total number of precoding matrices indicated by the PMI as a function of the number of configured first subbands or the number of the plurality of first subbands, the size of one first subband, and the number of PRBs of the BWP.

[0090] In some embodiments, the second subband may correspond to a subband of a precoding matrix indicator (PMI) or a PMI subband.

[0091] 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 teeth, It may be based on TIFF2025528069000018.tif815. For example, TIFF2025528069000019.tif850.

[0092] In some embodiments, the number of the plurality of second subbands N3 or the size or length of one third vector may be a positive integer, for example, 9≦N3≦36. TIFF2025528069000020.tif967. Another example is TIFF2025528069000021.tif1072. Another example is TIFF2025528069000022.tif1072. Another example is TIFF2025528069000023.tif1080. Another example is TIFF2025528069000024.tif1081. Another example is TIFF2025528069000025.tif1081. Another example is The file is TIFF2025528069000026.tif1081.

[0093] In some embodiments, when R=1, there may be one precoding matrix indicated for each first subband. In some embodiments, when R=2, for a first subband that is not the first / starting one or the last / ending one of the first subbands in the BWP, there may be two precoding matrices indicated for one of the first subbands. For example, the first precoding matrix may be the first of the first subbands. TIFF2025528069000027.tif corresponds to 924 PRBs, and the second precoding matrix is ​​the last of the first subbands TIFF2025528069000028.tif corresponds to 924 PRBs. In some embodiments, when R=2, for one first subband that is the first / starting one or the last / ending one of the first subbands in the BWP, In the case of TIFF2025528069000029.tif1484, there may be one precoding matrix indicated corresponding to the first / starting subband among the multiple first subbands.

[0094] In some embodiments, when R=2, for a first subband that is the first / starting one or the last / ending one of the first subbands in the BWP, In the case of TIFF2025528069000030.tif1484, there may be two precoding matrices indicated corresponding to the first / starting subband of the plurality of first subbands. For example, the first precoding matrix may be the first precoding matrix of the first subband of the plurality of first subbands. TIFF2025528069000031.tif1483 PRBs, the second precoding matrix is ​​the last of the first subband of the first subband TIFF2025528069000032.tif1414 may support PRB.

[0095] In some embodiments, when R=2, for a first subband that is the first / starting one or the last / ending one of the first subbands in the BWP, In the case of TIFF2025528069000033.tif17165, there may be one precoding matrix indicated corresponding to the last / ending subband among the multiple first subbands.

[0096] In some embodiments, when R=2, for one first subband that is the first / starting one or the last / ending one of the plurality of first subbands, In the case of TIFF2025528069000034.tif17167, there may be two precoding matrices indicated corresponding to the last / ending subband of the first subbands. For example, the first precoding matrix may be the first precoding matrix of the last / ending one of the first subbands. TIFF2025528069000035.tif corresponds to 1414 PRBs, and the second precoding matrix is ​​the last of the first subbands. TIFF2025528069000036.tif15144 may support PRB.

[0097] In some embodiments, a plurality of third vectors M v The number of can be a positive integer. For example, TIFF2025528069000037.tif1340. For example, M v may be one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}.

[0098] In some embodiments, the value of the first parameter R of the codebook is determined based on the number of antenna port groups in the second plurality (or T sIn some embodiments, the number of the second plurality of antenna port groups may be determined based on the value of . s = 1, the value of the first parameter R may be one of {1, 2}. In some embodiments, when the number of the second plurality of antenna port groups is greater than 1 or T s >1 (e.g., T s = 2, 3, or 4), the value of the first parameter R may be one of {2, 4}, {2, 3}, {1, 3}, {1, 2, 3, 4}, or {3, 4}. In some embodiments, when the number of the second plurality of antenna port groups is 4 (e.g., T s = 4), the value of the first parameter R may be one of {2, 4} or {3, 4}.

[0099] In some embodiments, the plurality of precoding matrices is L+M v Vector, L t +M v Vector, T.L. t +M v Vector or T s L t +M v It may be determined from the vector.

[0100] In some embodiments, the bit size of the one or more indicators (or fields) of the second plurality of antenna port groups is ceil(log2(nchoosek(T1, T s In some embodiments, the bit size of the one or more indicators (or fields) of the second plurality of antenna port groups may be ceil(log2(T1! / (T1-T s )!)) is also possible.

[0101] 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.

[0102] In some embodiments, one or more indicators (or fields) of the second plurality of antenna port groups may be included in the PMI or the first portion of the PMI.

[0103] In some embodiments, the number of one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be the same as the number of layers. In some embodiments, the number of one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be 1, e.g., common to each of the multiple layers. In some embodiments, the one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be the same in each of the multiple layers.

[0104] In some embodiments, the index of the first antenna port group is T m For example, T m can be a non-negative integer, e.g., 1 ≤ T m ≦T1. Another example is 0≦T m ≦T1-1. As another example, 1≦T m ≦T s As another example, 0≦T m ≦T s It is -1.

[0105] In some embodiments, the bit size of the one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be determined based on the number of the first plurality of antenna port groups. In some embodiments, the bit size of the one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be ceil(log2(T s In some embodiments, the one or more indicators (or one or more indices, or one or more fields) of the first antenna port group may be included in the PMI, the first part of the PMI, or the second part of the PMI.

[0106] In some embodiments, the one or more indicators (or fields) of the second plurality of antenna port groups may indicate an ordering of the second plurality of antenna port groups, and in some embodiments, the first of the indicated second plurality of antenna port groups may be the same as the index (or indicator) of the first antenna port group.

[0107] In some embodiments, a second vector of the plurality of second vectors is: TIFF2025528069000038.tif923. TIFF2025528069000039.tif24166. In some embodiments, TIFF2025528069000040.tif33146. In some embodiments, TIFF2025528069000041.tif1174. In some embodiments, TIFF2025528069000042.tif1181. In some embodiments, TIFF2025528069000043.tif11131. In some embodiments, i=0, 1, ...L t In some embodiments, t=0, 1, ...T1-1. In some embodiments, t=0, 1, ...T s It is -1.

[0108] In some embodiments, q 1,t and q 2,t may be a rotation of a second plurality of rotations about a plurality of second vectors. For example, q 1,t and q 2,t may be the rotation corresponding to the antenna port group of index t. In some embodiments, q 1,t ∈{0, 1, ... O1-1}. In some embodiments, q 2,t ∈{0,1,…O2-1}.

[0109] In some embodiments, the length of the one first vector may be based on the number of the second plurality of antenna port groups. In some embodiments, the length of the one first vector may be based on the number of antenna ports in one antenna port group multiplied by the number of the second plurality of antenna port groups divided by two, or a fifth value. In some embodiments, the length of the one first vector may be based on P*T s , P*T1 / 2, P t *T s / 2 or P t *T1 / 2 may also be used.

[0110] In some embodiments, the length of one second vector may be based on the number of antenna ports in one antenna port group. In some embodiments, the length of one second vector may be P / 2 or P t / 2.

[0111] In some embodiments, the number of the one or more indicators (or fields) of the plurality of first amplitude coefficients may be based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. In some embodiments, the number of the one or more indicators (or fields) of the plurality of first amplitude coefficients may be based on the number of the first plurality of antenna port groups minus one or the number of the second plurality of antenna port groups minus one.

[0112] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients is K b1 *(T-1), K b1 *(T1-1), K b1 *(T s -1), or TIFF2025528069000044.tif974. In some embodiments, K b1 may be the bit size of each of the first amplitude coefficients. For example, K b1 may be 2 bits, 3 bits, or 4 bits.

[0113] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients may be determined based on the number of the plurality of fourth vectors and either the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0114] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients is K b1 *(T-1)*M w , K. b1 *(T1-1)*M w , K. b1 *(T s -1)*M w or It could also be TIFF2025528069000045.tif992.

[0115] In some embodiments, one or more indicators (or fields) of the plurality of first amplitude coefficients may be included in the PMI, the first portion of the PMI, or the second portion of the PMI.

[0116] In some embodiments, the number of the one or more indicators (or fields) of the plurality of first phase coefficients may be based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. In some embodiments, the number of the one or more indicators (or fields) of the plurality of first phase coefficients may be based on the number of the first plurality of antenna port groups minus one or the number of the second plurality of antenna port groups minus one.

[0117] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients is K b2 *(T-1), K b2 *(T1-1), K b2 *(T s -1) or TIFF2025528069000046.tif1074. In some embodiments, K b2 may be the bit size of each of the first phase coefficients. For example, K b2 may be 2 bits, 3 bits, or 4 bits.

[0118] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be determined based on the number of the plurality of fourth vectors and either the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0119] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients is K b2 *(T-1)*M w , K. b2 *(T1-1)*M w , K. b2 *(Ts -1)*M w or It could also be TIFF2025528069000047.tif992.

[0120] In some embodiments, one first vector is v i It may be expressed as: TIFF2025528069000048.tif5196

[0121] In some embodiments, TIFF2025528069000049.tif1112 may be the first amplitude coefficient of the antenna port group with index t. TIFF2025528069000050.tif1113 may be the first phase coefficient of the antenna port group with index t.

[0122] In some embodiments, T may be based on the number T1 of the first plurality of antenna port groups. In some embodiments, T=T1. In some embodiments, T is based on the number T2 of the second plurality of antenna port groups. s In some embodiments, T=T s is.

[0123] In some embodiments, In TIFF2025528069000051.tif1442, TIFF2025528069000052.tif854. For example, the size of W1 is (2*N1*N2*T)*(2*L t ) or (2*N1*N2*T s )*(2*L t For example, the size of each element of W1 may be (N1*N2*T)*L t and "0" in W1 is the size (N1*N2*T)*L t may be a zero matrix of

[0124] In some embodiments, The file is TIFF2025528069000053.tif18111.

[0125] In some embodiments, W1=W 01 *W 02 is.

[0126] In some embodiments, The file is TIFF2025528069000054.tif69147.

[0127] In some embodiments, W 01 The size is (2*N1*N2)*(2*L t ) may also be used.

[0128] In some embodiments, The file is TIFF2025528069000055.tif15131.

[0129] In some embodiments, The file is TIFF2025528069000056.tif8765.

[0130] In some embodiments, The file is TIFF2025528069000057.tif85166.

[0131] In some embodiments, for W2 corresponding to the layer with index r, JPEG2025528069000058.jpg50167 is.

[0132] In some embodiments, f may be an index of one third vector, e.g., f=0, 1, ...M v It is -1.

[0133] In some embodiments, TIFF2025528069000059.tif1112 may be the second amplitude coefficient corresponding to the layer with index r. TIFF2025528069000060.tif1112 may not be necessary. TIFF2025528069000061.tif1112 may be fixed to 1.

[0134] In some embodiments, TIFF2025528069000062.tif1218 may be a third amplitude coefficient corresponding to a layer with index r, corresponding to one first vector with index i, and corresponding to a third vector with index f.

[0135] In some embodiments, TIFF2025528069000063.tif1219 may be a third amplitude coefficient corresponding to a layer with index r, corresponding to one first vector with index i, and corresponding to a third vector with index f.

[0136] In some embodiments, s may be 0 and / or 1. For example, s may be for two polarities. In some embodiments, s may be for different groups of vectors.

[0137] In some embodiments, a third vector (e.g., W f ) is expressed as TIFF2025528069000064.tif1797. In some embodiments, f The size is M v *N3 is also acceptable.

[0138] In some embodiments, TIFF2025528069000065.tif1063.

[0139] In some embodiments, TIFF2025528069000066.tif26153.

[0140] In some embodiments, The file is TIFF2025528069000067.tif1854.

[0141] In some embodiments, z may be the index of the second subband, for example z={0, 1, ... N3-1}.

[0142] In some embodiments, for a codebook corresponding to a layer with index r and a second subband with index z, The file is TIFF2025528069000068.tif56161.

[0143] In some embodiments, γ z,r may be a variant for power calculation or power normalization.

[0144] In some embodiments, γ z,r may be based on a plurality of third amplitude coefficients, a plurality of third phase coefficients, and at least one of a plurality of first amplitude coefficients, a plurality of second amplitude coefficients, a plurality of first phase coefficients, and a plurality of second phase coefficients. z,r may be based on the number of the plurality of third vectors and at least one of the number of the plurality of first vectors, the number of the plurality of second vectors, and the number of the plurality of fourth vectors.

[0145] In some embodiments, TIFF2025528069000069.tif22137 is.

[0146] In some embodiments, for bits, code points, or values ​​in one or more indicators (or one or more bitmaps) that indicate a non-zero coefficient with a value of 0, the third amplitude coefficient and / or the third phase coefficient corresponding to the bit, code point, or value may be set to 0.

[0147] In some embodiments, the number of the plurality of first vectors may be determined based on the number of the plurality of second vectors and at least one of the number of the first plurality of antenna port groups, the number of the second plurality of antenna port groups, and the values ​​of the plurality of first amplitude coefficients.

[0148] In some embodiments, The file is TIFF2025528069000070.tif69143.

[0149] In some embodiments, The file is TIFF2025528069000071.tif15131.

[0150] In some embodiments, corresponding to the layer with index r, JPEG2025528069000072.jpg86167.

[0151] In some embodiments, TIFF2025528069000073.tif1012 may be the first amplitude coefficient of the antenna port group with index t. TIFF2025528069000074.tif1012 may not be needed. TIFF2025528069000075.tif1012 may be fixed to 1.

[0152] In some embodiments, TIFF2025528069000076.tif1013 may be the first phase coefficient for the antenna port group with index t. TIFF2025528069000077.tif1013 may not be necessary. TIFF2025528069000078.tif1013 may be fixed to 1.

[0153] In some embodiments, TIFF2025528069000079.tif1114 may be a second amplitude coefficient corresponding to the antenna port group with index t and the layer with index r. TIFF2025528069000080.tif1114 may not be necessary. TIFF2025528069000081.tif1114 may be fixed to 1.

[0154] In some embodiments, TIFF2025528069000082.tif1221 may be the third amplitude coefficient of the antenna port group with index t, correspond to the layer with index r, correspond to the first vector with index i, and correspond to the third vector with index f.

[0155] In some embodiments, TIFF2025528069000083.tif1223 may be the third amplitude coefficient of the antenna port group with index t, correspond to a layer with index r, correspond to one first vector with index i, and correspond to a third vector with index f.

[0156] In some embodiments, a third vector (e.g., W f ) is expressed as TIFF2025528069000084.tif1897. In some embodiments, f The size is M v *N3.

[0157] In some embodiments, The file is TIFF2025528069000085.tif1063.

[0158] In some embodiments, The file is TIFF2025528069000086.tif26153.

[0159] In some embodiments, for a codebook corresponding to a layer with index r and a second subband with index z, The file is TIFF2025528069000087.tif21167.

[0160] In some embodiments, the value of one first amplitude coefficient is: JPEG2025528069000088.jpg8166. In some embodiments, the bit size of one first amplitude coefficient may be 4 bits. In some embodiments, the value of the indicator or field of one first amplitude coefficient is one of {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}.

[0161] In some embodiments, an indicator or field of 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 of one first amplitude coefficient having a value of 1 may correspond to a first amplitude coefficient having a value of 1. TIFF2025528069000089.tif1213 may correspond to the first amplitude coefficient.

[0162] In some embodiments, one first amplitude coefficient indicator or field having the value 2 is TIFF2025528069000090.tif1528 may correspond to the first amplitude coefficient.

[0163] In some embodiments, one first amplitude coefficient indicator or field having a value of 3 may correspond to a first amplitude coefficient having a value of 1 / 8. In some embodiments, one first amplitude coefficient indicator or field having a value of 4 may correspond to a first amplitude coefficient having a value of 1 / 8. TIFF2025528069000091.tif1528 may correspond to the first amplitude coefficient.

[0164] In some embodiments, one first amplitude coefficient indicator or field having a value of 5 is TIFF2025528069000092.tif1211. In some embodiments, one first amplitude coefficient indicator or field having a value of 6 may correspond to a first amplitude coefficient having a value of 6. TIFF2025528069000093.tif1525 may correspond to the first amplitude coefficient.

[0165] In some embodiments, one first amplitude coefficient indicator or field having a value of 7 may correspond to a first amplitude coefficient having a value of 1 / 4. In some embodiments, one first amplitude coefficient indicator or field having a value of 8 may correspond to a first amplitude coefficient having a value of 1 / 4. TIFF2025528069000094.tif1525 may correspond to the first amplitude coefficient.

[0166] In some embodiments, one first amplitude coefficient indicator or field having the value 9 is TIFF2025528069000095.tif137. In some embodiments, one first amplitude coefficient indicator or field having a value of 10 may correspond to a first amplitude coefficient having a value of 10. TIFF2025528069000096.tif1522 may correspond to the first amplitude coefficient.

[0167] In some embodiments, an indicator or field of 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 of one first amplitude coefficient having a value of 12 may correspond to a first amplitude coefficient having a value of 1 / 2. TIFF2025528069000097.tif1519 may correspond to the first amplitude coefficient.

[0168] In some embodiments, one first amplitude coefficient indicator or field having the value 13 is TIFF2025528069000098.tif127. In some embodiments, one first amplitude coefficient indicator or field having a value of 14 may correspond to a first amplitude coefficient having a value of 14. TIFF2025528069000099.tif1519. In some embodiments, one first amplitude coefficient indicator or field having a value of 15 may correspond to a first amplitude coefficient having a value of 1.

[0169] In some embodiments, the value of one first amplitude coefficient is: TIFF2025528069000100.tif1390. In some embodiments, the bit size of one first amplitude coefficient may be 4 bits. In some embodiments, the value of the indicator or field of one first amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7}.

[0170] In some embodiments, an indicator or field of 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 of one first amplitude coefficient having a value of 1 may correspond to a first amplitude coefficient having a value of 1. TIFF2025528069000101.tif1310 may correspond to the first amplitude coefficient.

[0171] In some embodiments, one first amplitude coefficient indicator or field having the value 2 is TIFF2025528069000102.tif1210 may correspond to the first amplitude coefficient.

[0172] In some embodiments, an indicator or field of one first amplitude coefficient having a value of 3 may correspond to a first amplitude coefficient having a value of 1 / 4. In some embodiments, an indicator or field of one first amplitude coefficient having a value of 4 may correspond to a first amplitude coefficient having a value of 1 / 4. TIFF2025528069000103.tif137 may correspond to the first amplitude coefficient.

[0173] In some embodiments, an indicator or field of one first amplitude coefficient having a value of 5 may correspond to a first amplitude coefficient having a value of 1 / 2. In some embodiments, an indicator or field of one first amplitude coefficient having a value of 6 may correspond to a first amplitude coefficient having a value of 1 / 2. TIFF2025528069000104.tif127. In some embodiments, one first amplitude coefficient indicator or field having a value of 7 may correspond to a first amplitude coefficient having a value of 1.

[0174] 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 first amplitude coefficient indicator or field corresponding to the first antenna port group (e.g., antenna port group with index T m The value of the first amplitude coefficient corresponding to the antenna port group having the first amplitude coefficient, or the indicator or field of the first amplitude coefficient, may not be reported in the PMI.

[0175] 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 first amplitude coefficient indicator or field 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 first amplitude coefficient indicator or field corresponding to an antenna port group not included in the second plurality of antenna port groups may not be reported in the PMI.

[0176] In some embodiments, the value of one second amplitude coefficient is: JPEG2025528069000105.jpg8167. In some embodiments, the bit size of one second amplitude coefficient may be 4 bits. In some embodiments, the value of the indicator or field of one second amplitude coefficient may be one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}.

[0177] In some embodiments, one second amplitude coefficient indicator or field having a value of 0 may correspond to a second amplitude coefficient having a value of 0. In some embodiments, one second amplitude coefficient indicator or field having a value of 1 may correspond to a second amplitude coefficient having a value of 1. TIFF2025528069000106.tif1213. In some embodiments, one second amplitude coefficient indicator or field having the value 2 may correspond to a second amplitude coefficient having the value It may correspond to the second amplitude coefficient having TIFF2025528069000107.tif1528.

[0178] In some embodiments, one second amplitude coefficient indicator or field having a value of 3 may correspond to a second amplitude coefficient having a value of 1 / 8. In some embodiments, one second amplitude coefficient indicator or field having a value of 4 may correspond to a second amplitude coefficient having a value of 1 / 8. It may correspond to the second amplitude coefficient having TIFF2025528069000108.tif1528.

[0179] In some embodiments, one second amplitude coefficient indicator or field having a value of 5 is TIFF2025528069000109.tif1211. In some embodiments, one second amplitude coefficient indicator or field having a value of 6 may correspond to a second amplitude coefficient having a value of 6. TIFF2025528069000110.tif1525. In some embodiments, one second amplitude coefficient indicator or field having a value of 7 may correspond to a second amplitude coefficient having a value of 1 / 4.

[0180] In some embodiments, one second amplitude coefficient indicator or field having the value 8 is In some embodiments, one second amplitude coefficient indicator or field having a value of 9 may correspond to a second amplitude coefficient having a value of 9. It may correspond to the second amplitude coefficient having TIFF2025528069000112.tif137.

[0181] In some embodiments, one second amplitude coefficient indicator or field having a value of 10 is It may correspond to the second amplitude coefficient having TIFF2025528069000113.tif1522.

[0182] In some embodiments, one second amplitude coefficient indicator or field having a value of 11 may correspond to a second amplitude coefficient having a value of 1 / 2. In some embodiments, one second amplitude coefficient indicator or field having a value of 12 may correspond to a second amplitude coefficient having a value of 1 / 2. TIFF2025528069000114.tif1519 may correspond to the second amplitude coefficient.

[0183] In some embodiments, one second amplitude coefficient indicator or field having the value 13 is TIFF2025528069000115.tif127. In some embodiments, one second amplitude coefficient indicator or field having a value of 14 may correspond to a second amplitude coefficient having a value of 14. TIFF2025528069000116.tif1519. In some embodiments, one second amplitude coefficient indicator or field having a value of 15 may correspond to a second amplitude coefficient having a value of 1.

[0184] In some embodiments, the value of one second amplitude coefficient is: TIFF2025528069000117.tif1390. In some embodiments, the bit size of one second amplitude coefficient is 4 bits. In some embodiments, the value of the indicator or field of one second amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7}.

[0185] In some embodiments, one second amplitude coefficient indicator or field having a value of 0 may correspond to a second amplitude coefficient having a value of 0. In some embodiments, one second amplitude coefficient indicator or field having a value of 1 may correspond to a second amplitude coefficient having a value of 1. It may correspond to the second amplitude coefficient having TIFF2025528069000118.tif1310.

[0186] In some embodiments, one second amplitude coefficient indicator or field having the value 2 is TIFF2025528069000119.tif1210. In some embodiments, one second amplitude coefficient indicator or field having a value of 3 may correspond to a second amplitude coefficient having a value of 1 / 4. In some embodiments, one second amplitude coefficient indicator or field having a value of 4 may correspond to a second amplitude coefficient having a value of 1 / 4. It may correspond to the second amplitude coefficient having TIFF2025528069000120.tif137.

[0187] In some embodiments, one second amplitude coefficient indicator or field having a value of 5 may correspond to a second amplitude coefficient having a value of 1 / 2. In some embodiments, one second amplitude coefficient indicator or field having a value of 6 may correspond to a second amplitude coefficient having a value of 1 / 2. TIFF2025528069000121.tif127. In some embodiments, one second amplitude coefficient indicator or field having a value of 7 may correspond to a second amplitude coefficient having a value of 1.

[0188] In some embodiments, the value of one second amplitude coefficient is: TIFF2025528069000122.tif1292. In some embodiments, the bit size of one second amplitude coefficient may be 3 bits. In some embodiments, the value of the indicator or field of one second amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7}.

[0189] In some embodiments, one second amplitude coefficient indicator or field having a value of 0 is replaced by a value of TIFF2025528069000123.tif1310. In some embodiments, one second amplitude coefficient indicator or field having a value of 1 may correspond to a second amplitude coefficient having a value of 1 / 8.

[0190] In some embodiments, one second amplitude coefficient indicator or field having the value 2 is TIFF2025528069000124.tif1311 In some embodiments, one second amplitude coefficient indicator or field having a value of 3 may correspond to a second amplitude coefficient having a value of 1 / 4.

[0191] In some embodiments, one second amplitude coefficient indicator or field having a value of 4 is TIFF2025528069000125.tif1211. In some embodiments, one second amplitude coefficient indicator or field having a value of 5 may correspond to a second amplitude coefficient having a value of 1 / 2.

[0192] In some embodiments, one second amplitude coefficient indicator or field having a value of 6 is TIFF2025528069000126.tif127. In some embodiments, a second amplitude coefficient indicator or field having a value of 7 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.

[0193] In some embodiments, the value of one second amplitude coefficient is: TIFF2025528069000127.tif1220. In some embodiments, the bit size of one second amplitude coefficient may be 1 bit. In some embodiments, the value of the indicator or field of one second amplitude coefficient may be one of {0, 1}. In some embodiments, the indicator or field of one second amplitude coefficient having a value 0 may have a value TIFF2025528069000128.tif127 may correspond to the second amplitude coefficient.

[0194] In some embodiments, a second amplitude coefficient indicator or field 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.

[0195] 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 second amplitude coefficient indicator or field 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 second amplitude coefficient indicator or field corresponding to an antenna port group not included in the second plurality of antenna port groups may not be reported in the PMI.

[0196] In some embodiments, the value of one third amplitude coefficient is: TIFF2025528069000129.tif1180. In some embodiments, the bit size of one third amplitude coefficient may be 3 bits. In some embodiments, the value of the indicator or field of one third amplitude coefficient may be one of {0, 1, 2, 3, 4, 5, 6, 7}.

[0197] In some embodiments, one third amplitude coefficient indicator or field having a value of 0 is TIFF2025528069000130.tif1310. In some embodiments, one third amplitude coefficient indicator or field having a value of 1 corresponds to a third amplitude coefficient having a value of 1 / 8.

[0198] In some embodiments, one third amplitude coefficient indicator or field having a value of 2 is TIFF2025528069000131.tif1311. In some embodiments, one third amplitude coefficient indicator or field having a value of 3 may correspond to a third amplitude coefficient having a value of 1 / 4. In some embodiments, one third amplitude coefficient indicator or field having a value of 4 may correspond to a third amplitude coefficient having a value of 1 / 4. It may correspond to the third amplitude coefficient having TIFF2025528069000132.tif1211.

[0199] In some embodiments, one third amplitude coefficient indicator or field having a value of 5 may correspond to a third amplitude coefficient having a value of 1 / 2. In some embodiments, one third amplitude coefficient indicator or field having a value of 6 may correspond to a third amplitude coefficient having a value of 1 / 2. TIFF2025528069000133.tif127. In some embodiments, a third amplitude coefficient indicator or field having a value of 7 may correspond to a third amplitude coefficient having a value of 1. In some embodiments, a third amplitude coefficient may be a difference value corresponding to a first amplitude coefficient and / or a second amplitude coefficient.

[0200] In some embodiments, the value of one third amplitude coefficient is: TIFF2025528069000134.tif1220. In some embodiments, the bit size of one third amplitude coefficient may be 1 bit. In some embodiments, the value of the indicator or field of one third amplitude coefficient may be one of {0, 1}. In some embodiments, the indicator or field of one third amplitude coefficient having a value 0 may have a value TIFF2025528069000135.tif127. In some embodiments, one third amplitude coefficient indicator or field having a value of 1 may correspond to a third amplitude coefficient having a value of 1.

[0201] In some embodiments, for a bit, code point, or value of one or more indicators (or one or more bitmaps) indicating a non-zero coefficient whose value is 0, the value of the first amplitude coefficient corresponding to the bit, code point, or value may be set to 0, and / or the value of the first amplitude coefficient indicator or field corresponding to the bit, code point, or value may be set to 0. In some embodiments, the value of the first amplitude coefficient corresponding to the bit, code point, or value, and / or the value of the first amplitude coefficient indicator or field corresponding to the bit, code point, or value may not be reported in the PMI.

[0202] In some embodiments, for a bit, code point, or value of one or more indicators (or one or more bitmaps) indicating a non-zero coefficient whose value is 0, the value of the second amplitude coefficient corresponding to the bit, code point, or value may be set to 0, and / or the value of the second amplitude coefficient indicator or field corresponding to the bit, code point, or value may be set to 0. In some embodiments, the value of the second amplitude coefficient corresponding to the bit, code point, or value, and / or the value of the second amplitude coefficient indicator or field corresponding to the bit, code point, or value may not be reported in the PMI.

[0203] In some embodiments, for a bit, code point, or value of one or more indicators (or one or more bitmaps) indicating a non-zero coefficient whose value is 0, the value of the third amplitude coefficient corresponding to the bit, code point, or value may be set to 0, and / or the value of the third amplitude coefficient indicator or field corresponding to the bit, code point, or value may be set to 0. In some embodiments, the value of the third amplitude coefficient corresponding to the bit, code point, or value, and / or the value of the third amplitude coefficient indicator or field corresponding to the bit, code point, or value may not be reported in the PMI.

[0204] In some embodiments, for a bit, code point, or value of one or more indicators (or one or more bitmaps) indicating a non-zero coefficient whose value is 0, the value of at least one of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit, code point, or value may be set to 0, and / or the value of at least one indicator or field of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit, code point, or value may be set to 0. In some embodiments, the value of at least one of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit, code point, or value, and / or the value of at least one indicator or field of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit, code point, or value may not be reported in the PMI.

[0205] In some embodiments, the value of one first phase coefficient is TIFF2025528069000136.tif737. In some embodiments, p may be the value of one indicator or field of the first phase coefficient. In some embodiments, the value of one second phase coefficient is TIFF2025528069000137.tif737. In some embodiments, p may be an indicator or field value of the second phase coefficient. In some embodiments, the value of a third phase coefficient is TIFF2025528069000138.tif737. In some embodiments, p may be an indicator or a value of a field of the third phase coefficient. p may be a non-negative integer. p may be one of {0, 1, 2, 3}, {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 c pIn some embodiments, the size of the N PSK may be a positive integer. In some embodiments, N PSK may be one of {2, 4, 8, 16}.

[0206] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients is K b1 *(T-1), K b1 *(T1-1), K b1 *(T s -1) or TIFF2025528069000139.tif1074. In some embodiments, K b1 may be the bit size of each of the first amplitude coefficients. For example, K b1 may be 2 bits, 3 bits, or 4 bits.

[0207] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients may be determined based on the number of the plurality of fourth vectors and any one of the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0208] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients is K b1 *(T-1)*M w , K. b1 *(T1-1)*M w , K. b1 *(T s -1)*M w or It could also be TIFF2025528069000140.tif992.

[0209] In some embodiments, one or more indicators (or fields) of the plurality of first amplitude coefficients may be included in the PMI, the first portion of the PMI, or the second portion of the PMI.

[0210] In some embodiments, the number of the one or more indicators (or fields) for the plurality of first phase factors may be based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. In some embodiments, the number of the one or more indicators (or fields) for the plurality of first phase factors may be based on the number of the first plurality of antenna port groups minus one or the number of the second plurality of antenna port groups minus one.

[0211] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients is K b2 *(T-1), K b2 *(T1-1), K b2 *(T s -1) or TIFF2025528069000141.tif1074. In some embodiments, it may be the bit size of each of the first phase coefficients. For example, K b2 is 2 (e.g., N PSK =4), 3 (e.g., N PSK =8) or 4 (e.g., N PSK =16) bits.

[0212] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be determined based on the number of the plurality of fourth vectors and either the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0213] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients is K b2 *(T-1)*M w , K. b2 *(T1-1)*M w , K. b2 *(T s -1)*M w or It could also be TIFF2025528069000142.tif992.

[0214] In some embodiments, the first vector may be after Schmidt orthogonalization based on the first vector of the present disclosure.

[0215] In some embodiments, the antenna ports of the first plurality of antenna port groups may be within one CSI-RS resource. In some embodiments, each antenna port group may be at least one of the antenna ports within one code division multiplexing (CDM) group within the CSI-RS resource and a subset of the antenna ports of the CSI-RS resource. In some embodiments, each antenna port group within the first plurality of antenna port groups and / or the second plurality of antenna port groups may correspond to one CSI-RS resource. In some embodiments, different antenna port groups within the first plurality of antenna port groups and / or the second plurality of antenna port groups may correspond to different CSI-RS resources.

[0216] In some embodiments, the terminal device may determine and / or report a first set of codebook indicators and a second set of codebook indicators in one CSI report or one PMI report. In some embodiments, the first set of codebook indicators may correspond to a first value of the number of the second plurality of antenna port groups, and the second set of codebook indicators may correspond to a second value of the number of the second plurality of antenna port groups. In some embodiments, at least one parameter or indicator corresponding to the first set of codebook indicators may be different from at least one parameter or indicator corresponding to the second set of codebook indicators.

[0217] In some embodiments, the value of N3 corresponding to the first set of codebook indicators may be less than or equal to the value of N3 corresponding to the second set of codebook indicators. In some embodiments, the value of the first parameter and / or the value of the fourth parameter corresponding to the first set of codebook indicators may be less than or equal to the value of the first parameter and / or the value of the fourth parameter corresponding to the second set of codebook indicators. In some embodiments, the first value of the number of the second plurality of antenna port groups may be 1. In some embodiments, the second value of the number of the second plurality of antenna port groups may be 2, 3, or 4. In some embodiments, the first set of codebook indicators may be a single-TRP hypothesis. In some embodiments, the second set of codebook indicators may be a multi-TRP hypothesis.

[0218] In some embodiments, the bit size of one or more indicators or fields of the plurality of third amplitude coefficients and / or the bit size of one or more indicators or fields of the plurality of third phase coefficients corresponding to the first set of codebook indicators may be smaller than the bit size of one or more indicators or fields of the plurality of third amplitude coefficients and / or the bit size of one or more indicators or fields of the plurality of third phase coefficients corresponding to the second set of codebook indicators.

[0219] In some embodiments, the bit size of the one or more indicators for the plurality of first vectors and / or the bit size of the one or more indicators for the plurality of second vectors may be ceil(log2(nchoosek(N1N2,L))) or ceil(log2(nchoosek(N1N2,L)) t *T))) or ceil(log2(nchoosek(N1N2,L t *T1))) or ceil(log2(nchoosek(N1N2, L t *T s ))) may be based on

[0220] In some embodiments, the indicator or field of the number of first vectors may indicate a first vector group or a second vector group. For example, the number of first vectors or the number of second vectors in a group may be L t , L, L t *T1 or L t *T s In some embodiments, the plurality of second vectors indicator or field may indicate a second vector group. For example, the number of second vectors in a group may be L t , L, L t *T1 or L t *T s may be.

[0221] Table 10 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 10 Example of mapping order of CSI fields for one CSI report, CSI Part 2 JPEG2025528069000143.jpg176168

[0222] Table 11 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 11. Another example of the mapping order of CSI fields for one CSI report, CSI Part 2 JPEG2025528069000144.jpg169168

[0223] As mentioned above, multi-TRP transmission is planned to be supported. In the case of multi-TRP transmission, more parameters need to be reported to the network device compared to single-TRP transmission. For example, the terminal device needs to report CSI reporting for a new codebook. For CJT CSI, SD / FD base and / or phase / amplitude coefficients may be reported for each TRP. However, the CSI reporting defined in Release 16 and Release 17 does not support reporting CSI for a new codebook at the TRP level.

[0224] The embodiments of the present disclosure provide a solution for configuring and transmitting CSI feedback, in which the CSI feedback includes multiple partitions with different omission priorities, and parameters associated with one or more of the multiple CSI-RS assignments can be included in the multiple partitions. In this way, the priority rules for reporting parameters can be updated to adapt to scenarios in which multiple TRPs are supported.

[0225] For ease of explanation, some terms used in the following description are listed below. Omission priority: Indicates the priority for controlling dropping or omission. Specifically, different partitions / information groups in the CSI feedback can be configured to have different omission priorities. When transmission resources are insufficient, partitions / information groups (including related parameters) with lower omission priorities are dropped or omission first. CSI-RS Allocation: refers to a CSI-RS unit, a CSI-RS resource, a CSI-RS resource group, or a CSI-RS port group. In some embodiments, one CSI-RS Allocation may correspond to one TRP. First CSI-RS Allocation: Indicates a specific CSI-RS allocation, such as a CSI-RS allocation corresponding to a primary TRP, a TRP with index value 0, a TRP with the strongest amplitude coefficient, or a TRP with the highest power. 1st TRP: Indicates a specific TRP such as the primary TRP, the TRP with index value 0, the TRP with the strongest amplitude coefficient, or the TRP with the maximum power. First group of CSI-RS ports: Indicates a specific CSI-RS port group, such as the CSI-RS port group corresponding to the first CSI-RS allocation, the primary TRP, the TRP with index value 0, the TRP with the strongest amplitude coefficient, or the TRP with the highest power.

[0226] In the description herein, 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.

[0227] In this description, the terms "TCI state," "QCL parameter set," "QCL parameters," "QCL assumptions," and "QCL configuration" can be used interchangeably. The terms "TCI field," "TCI state field," and "transmission configuration indication" can be used interchangeably.

[0228] The terms "precoding matrix," "precoding," "beam," "beamforming," and "precoder" can be used interchangeably. The terms "vector," "radix," and "base" can be used interchangeably.

[0229] In the present description, 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.

[0230] 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.

[0231] In this description, the terms "pool," "set," "subset," "group," "unit," and "subgroup" can be used interchangeably.

[0232] In this description, 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.

[0233] In the present description, the terms "first vector," "first beam," "first base," "spatial domain / SD base vector," "spatial domain / SD vector," "spatial domain / SD basis," "spatial domain / SD base," and "first base" may be used interchangeably.

[0234] In the description of this application, the terms "second vector," "second beam," "beam," "second base," "spatial domain / SD base vector corresponding to a TRP index," "spatial domain / SD vector corresponding to a TRP index," "spatial domain / SD basis corresponding to a TRP index," "spatial domain / SD base corresponding to a TRP index," "second base corresponding to a TRP index," and "second base" can be used interchangeably.

[0235] In the description of this application, the terms "third vector," "third base," "frequency domain / FD base vector," "frequency domain / FD vector," "frequency domain / FD base," "frequency domain / FD base," "third base," "third vector corresponding to a TRP index," "third base corresponding to a TRP index," "frequency domain / FD base vector corresponding to a TRP index," "frequency domain / FD vector corresponding to a TRP index," "frequency domain / FD basis corresponding to a TRP index," "frequency domain / FD base corresponding to a TRP index," and "third base corresponding to a TRP index" may be used interchangeably.

[0236] In the present description, the terms "TRP", "TRP group", "CSI-RS resource" and "CSI-RS port group" can be used interchangeably.

[0237] In the present description, the terms "TRP index", "TRP group index", "CSI-RS resource index" and "CSI-RS port index group" can be used interchangeably.

[0238] In this description, the terms "element of an instruction field," "parameter," and "instruction" may be used interchangeably.

[0239] The principles and embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0240] <Embodiment of communication network> FIG. 2A illustrates an exemplary communication environment 200 in which embodiments of the present disclosure may be implemented.

[0241] Communication environment 200 includes network device 210-1 and terminal device 220, and network device 210-1 may communicate with terminal device 220 via a physical communication channel or link. Furthermore, network device 210-1 may provide multiple service areas.

[0242] Optionally, in some embodiments, communication environment 200 also includes another network device 210-2 that may communicate with terminal device 220. For ease of explanation, network devices 210-1 and 210-2 will each be referred to collectively or individually as network device 210.

[0243] In a specific example of communication environment 200, a link from terminal device 220 to network device 210-1 is referred to as an uplink, and a link from network device 210-1 to terminal device 220 is referred to as a downlink. Furthermore, because communication environment 200 supports MIMO, network device 210-1 and terminal device 220 communicate with each other via different beams, enabling directional communication. In the downlink, network device 210-1 is a transmitting (TX) device (or transmitter) and terminal device 220 is a receiving (RX) device (or receiver), and network device 210-1 may send downlink transmissions to terminal device 220 via one or more beams. As shown in FIG. 2A, network device 210-1 sends downlink transmissions to terminal device 220 via beams 240-1 to 240-3.

[0244] Similarly, on the uplink, network device 210-1 may be an RX device (or receiver), terminal device 220 may be a TX device (or transmitter), and terminal device 220 may transmit uplink transmissions to network device 210-1 via one or more beams. As shown in FIG. 2A, terminal device 220 transmits uplink transmissions to network device 210-1 via beams 230-1 through 230-3. For ease of explanation, beams 230-1 through 230-3 or beams 240-1 through 240-3 will be collectively referred to as beams 230 or beams 240, respectively.

[0245] Terminal device 220 may also be deployed with multiple panels. As shown in FIG. 2A, terminal device 220 is deployed with panels 250-1 and 250-2. Hereinafter, panels 250-1 and 250-2 may be referred to as first panel 250-1 and second panel 250-2, respectively. In some embodiments, panels 250-1 and 250-2 may each correspond to a different set of functional parameters.

[0246] In some embodiments, one panel may be associated with one or more CSI-RS assignments / beams. In this manner, terminal device 220 may use a particular panel to transmit a directional signal to network device 210-1 via a particular beam associated with a CSI-RS assignment.

[0247] In some embodiments, different panels correspond to different panel types / feature value sets. For example, panels 250-1 and 250-2 may correspond to different numbers of SRS ports, frequency resources (frequency bands, CCs, beams, etc.), and other suitable feature parameters (feature value sets, etc.).

[0248] Furthermore, in the specific example of FIG. 2A, network device 210-1 may send a CSI feedback configuration to terminal device 220, and terminal device 220 may also send CSI feedback to network device 210-1.

[0249] In some embodiments, the CSI feedback is transmitted on the PUSCH, or in some other embodiments, the CSI feedback is transmitted on the PUCCH.

[0250] Furthermore, the terminal device 220 may communicate with the network device 210 via one or more TRPs. Figure 2B illustrates an example scenario of the communication network 280. In the specific example of Figure 2B, a first TRP 285-1 and a second TRP 285-2 may be used for communication between the terminal device 220 and the network device 210.

[0251] In some embodiments, network device 210 may communicate with terminal device 220 via a first TRP and / or a second TRP and / or a third TRP and / or a fourth TRP. For example, the first TRP and / or the second TRP and / or the third TRP and / or the fourth TRP may be included in the same serving cell or different serving cells provided by network device 210. While some embodiments of the present disclosure are described with reference to the first TRP and / or the second TRP and / or the third TRP and / or the fourth TRP in the same serving cell provided by network device 210, these embodiments are for illustrative purposes only and are intended to assist those skilled in the art in understanding and implementing the present disclosure without implying any limitation on the scope of the present disclosure. It should be understood that the invention described herein can be implemented in various ways other than those described below.

[0252] 2C shows a schematic diagram 290 of the spatial domain, frequency domain, and Doppler / time domain base. As shown in FIG. 2C, there are multiple codebooks or precoding matrices including spatial domain, frequency domain, and Doppler / time domain vectors. In some embodiments, for each point in time or time unit in the Doppler / time domain, e.g., t=0, 1, 2, 3, ..., N4-1, there is a corresponding W(t), as shown in FIG. 2C. The parameter W(t) may be obtained by the following equation (1):

number

[0253] In some embodiments, the scope of work for CJT multi-TRP Type II codebook refinement includes down-selecting or merging at least one of the predefined codebook structures.

[0254] 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 subband). An example formulation (N=number of TRPs or TRP groups) is as follows: TIFF2025528069000146.tif26106where a r = resonance amplitude, p r = co-phase. Furthermore, a r =p r = 1 (no joint scaling) or a r Including the special case of =0.

[0255] 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 subband). An example formulation (N=number of TRPs or TRP groups) is as follows: TIFF2025528069000147.tif2689 where a r = resonance amplitude, p r = co-phase. Furthermore, a r =p r = 1 (no joint scaling) or a r Including the special case of =0.

[0256] In some embodiments, a further example of a predefined codebook structure is enabled through SD-based selection per TRP (port group or resource) and joint (across N TRPs) FD-based selection. An example formulation (N=number of TRPs or TRP groups) is as follows: TIFF2025528069000148.tif2774

[0257] 2A and 2B are shown for illustrative purposes and do not imply any limitations on the present disclosure. Communication environment 200 and communication network 280 may include any suitable number of network devices and / or terminal devices and / or TRPs adapted to carry out embodiments of the present disclosure.

[0258] 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, other suitable channels are also possible.

[0259] Communications in communication environment 200 and communication network 280 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 Communications (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.

[0260] <Process embodiment> Although features / operations are described individually in particular exemplary embodiments, it should be understood that these features / operations described in different exemplary embodiments can be used in any suitable combination unless expressly indicated to the contrary.

[0261] Also, in the following description, several interactions (e.g., configuration exchanges) occur between terminal device 220 and network device 210. The interactions include 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. It should be understood that this may be implemented with either a single signaling / message or multiple signaling / messages. The disclosure is not limited in this respect.

[0262] The principles and implementations of the present disclosure are described in detail below with reference to Figure 3, which illustrates a signaling chart illustrating a process 300 of communication according to some embodiments of the present disclosure. For ease of explanation, the process 300 is described with reference to Figures 2A and 2B. The process 300 may involve a terminal device 220 and a network device 210.

[0263] In some embodiments, there may be multiple TRPs, e.g., N TRPs / TRP groups, where N is greater than 2. Furthermore, each TRP / TRP group may be indexed by t, where t∈{0, 1, ... N-1} or t∈{1, 2, ... N}.

[0264] In some embodiments, each TRP / TRP group corresponds to a CSI-RS assignment such as a CSI-RS unit, a CSI-RS resource, a CSI-RS resource group, or a CSI-RS port group.

[0265] In one particular embodiment, there are multiple ports used for CSI-RS. The number of multiple ports is denoted as P, where P is one of {2, 4, 8, 12, 16, 24, 32}. The P ports may be divided into N port groups, where N is 1, 2, 3, or 4, and each TRP / TRP group may correspond to a CSI-RS port group.

[0266] In some embodiments, the value of the first antenna port configuration parameter may be represented as N1. For example, N1 may be a positive integer. For example, N1 may be at least one of {2, 3, 4, 6, 8, 12, 16}. In some embodiments, the value of the second antenna port configuration parameter may be represented as N2. For example, N2 may be a positive integer. For example, N2 may be at least one of {1, 2, 3, 4}. In some embodiments, the first antenna port configuration parameter and the second antenna port configuration parameter may be configured in one higher layer parameter.

[0267] In some embodiments, the number of antenna ports in an antenna port group may be determined based on a first antenna port configuration parameter and a second antenna port configuration parameter, and in some embodiments, each port group may include P_t ports, where P_t=N1*N2*2 or P_t=N1*N2*2 / N.

[0268] Alternatively or additionally, in another particular embodiment, terminal device 220 may be configured with K CSI-RS allocations, where each CSI-RS allocation may correspond to one TRP / TRP group, and K may be equal to N. In some embodiments, each CSI-RS allocation may include P ports, where P=N1*N2*2.

[0269] For the CJT scenario, for each TRP / TRP group, the number of SD bases is L tand the total number of SD bases for the multi-TRP may be L=N*Lt. Alternatively, for the first TRP, the number of SD bases may be L s and the total number of SD bases of the multi-TRP may be L=N*Ls.

[0270] In some embodiments, network device 210 may configure terminal device 220 to report CSI feedback. As shown in FIG. 3, terminal device 220 receives 310 configuration(s) for CSI feedback from the network device.

[0271] Terminal device 220 then transmits 330 CSI feedback to network device 210 based on the at least one configuration.

[0272] In some embodiments, the CSI feedback includes multiple partitions with different omission priorities. Figures 4A and 4B show example blocks of CSI feedback 400 and 450 according to some embodiments of the present disclosure. It should be understood that the specific structures shown in Figures 4A and 4B are for illustrative purposes only and do not imply any limitations. That is, the number of partitions and information groups may be changed.

[0273] In some embodiments, the multiple partitions include parameters associated with one or more CSI-RS allocations among multiple CSI-RS allocations. When multiple CSI-RS allocations are available (i.e., when multiple TRPs are supported), the parameters may be transmitted according to different skip priorities. As a result, the priority rules for reporting CSI parameters are updated to accommodate scenarios where multiple TRPs are supported.

[0274] In some embodiments, terminal device 220 determines 320 priority(s) 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 CSI-RS assignment among the multiple CSI-RS assignments. In this manner, the parameters may be transmitted according to the priority of the CSI-RS assignment. Alternatively, in some other embodiments, terminal device 220 determines a second priority for each parameter among the multiple parameters included in the CSI feedback. In this manner, the risk of dropping a parameter with a higher priority can be mitigated.

[0275] In some embodiments, the priority may be determined based on one or more factors. One example factor is the index of the CSI-RS resource. Another example factor is the index of the CSI-RS resource group. A further example factor is the index of the CSI-RS port group. Other factors include, but are not limited to, an SD-based index (e.g., an SD-based index corresponding to a CSI-RS allocation).

[0276] It should be understood that the above example factors do not imply any limitation and are presented for illustrative purposes only. In other example embodiments, other factors may be defined. The disclosure is not limited in this respect.

[0277] Furthermore, in some embodiments, different factors are set with different contributions when determining the priority, which makes the priority rules more flexible.

[0278] In some embodiments, terminal device 220 prioritizes parameters associated with a first CSI-RS allocation among multiple CSI-RS allocations. For purposes of illustration only and without implying limitation, the first CSI-RS allocation corresponds to either: Primary TRPs, TRP with index value 0, The TRP with the strongest amplitude coefficient, or -TRP with maximum power.

[0279] In this way, the risk of dropping parameters corresponding to relatively important TRPs is mitigated: even if some CSI parameters with lower priority are removed (e.g., they may not be suitable for multi-TRPCJT), the network device 210 can still obtain the complete CSI parameters for the specific TRP, and thus perform at least a single TRP transmission, so that communication between the network device 210 and the terminal device 220 is not interrupted.

[0280] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with the first CSI-RS resource group that includes the first CSI-RS allocation.

[0281] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with a first group of CSI-RS ports corresponding to the first CSI-RS allocation.

[0282] In this way, the CSI parameters (or a first subset of PMI fields and / or CQI) corresponding to one TRP / TRP group (denoted as the first TRP / TRP group) have a higher priority than the CSI parameters (or other subsets of PMI fields and / or CQI) corresponding to other TRPs (i.e., subsets of TRPs / TRP groups excluding the first TRP / TRP group, e.g., N-1 TRPs / TRP groups excluding the first TRP / TRP group).

[0283] According to some embodiments, even if CSI parameters with lower priority (e.g., parameters not suitable for multi-TRPCJT) are removed, at least a single TRP transmission can function properly to ensure communication between the terminal device 220 and the network device 210.

[0284] In the following description, some examples of priority rules are given for better understanding: 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, phase coefficient, etc.) is indexed by one or more parameters as follows: r, the layer index, · i, SD base index between multiple TRPs (e.g., first-based index); i t ,SD base index (e.g., second base index) corresponding to the TRP of index t, ·t, TRP index, f, an FD-based index (e.g., a third-based index), and f t , the FD-based index (e.g., third-based index) corresponding to the TRP of index t.

[0285] In some embodiments, the SD-based index is indexed across multiple TRPs, and the ranking is in ascending order of the multiple TRPs, e.g., {L0, L1, ... L N-1}, where L i is the index of the TRP, i={0, 1, ..., N-1}.

[0286] Alternatively, in other embodiments, the SD-based index corresponding to the strongest / first TRP may be indexed first, and then the SD-based indexes corresponding to the other TRPs (i.e., a subset of TRPs excluding the strongest / first TRP) may be indexed in ascending order of the other TRPs. In this case, the ranking is {L s , L0, …L N-1} where Ls is the index of the first TRP.

[0287] In one specific example, the priority associated with each reported element (eg, parameter) is determined by the following equation (2A) or (2B):

number

[0288] In some embodiments, TIFF2025528069000150.tif13129, TIFF2025528069000151.tif1137 or π(f)=f. In some embodiments, TIFF2025528069000152.tif13133, TIFF2025528069000153.tif1240 or π(f t )=f t In some embodiments, r=1, 2, ..., v ri In some embodiments, i=0, 1, ..., 2L-1. In some embodiments, f=0, 1, ..., M v In some embodiments, f t = 0, 1, …, M v In some embodiments, t=0, 1, ..., N-1. In some embodiments, t=1, 2, ..., N.

[0289] In another specific example, the priority associated with each reported element (eg, parameter) is determined by the following equation (3A) or (3B):

number

[0290] In some embodiments, TIFF2025528069000155.tif13129, TIFF2025528069000156.tif1241 or π(f)=f. In some embodiments, TIFF2025528069000157.tif13133, TIFF2025528069000158.tif1240 or π(f t )=f t In some embodiments, r=1, 2, ..., v ri In some embodiments, i t = 0, 1, …, 2L t -1. In some embodiments, f=0, 1, ..., M v In some embodiments, f t = 0, 1, …, M v In some embodiments, t=0, 1, ..., N-1. In some embodiments, t=1, 2, ..., N.

[0291] According to the above formula (3A) or (3B), the order of contributions for a priority (e.g., a parameter) is {FD base index corresponding to the TRP index, or FD base index, SD base index corresponding to the TRP index, TRP index, layer index}. For example, the order may be from lowest to highest priority.

[0292] In a more specific example, the priority associated with each reported element (eg, parameter) is determined by equation (4A) or (4B) below.

number

[0293] In some embodiments, TIFF2025528069000160.tif13129, TIFF2025528069000161.tif1241 or π(f)=f. In some embodiments, TIFF2025528069000162.tif13133, TIFF2025528069000163.tif1140 or π(f t )=f tIn some embodiments, r=1, 2, ..., v ri In some embodiments, i t = 0, 1, …, 2L t -1. In some embodiments, f=0, 1, ..., M v In some embodiments, f t = 0, 1, …, M v In some embodiments, t=0, 1, ..., N-1. In some embodiments, t=1, 2, ..., N.

[0294] According to the above formula (4A) or (4B), the order of contributions to the priority is {FD base index corresponding to the TRP index, TRP index, SD base index corresponding to the TRP index, layer index}. For example, the order may be from lowest to highest priority.

[0295] In a more specific example, the priority associated with each reported element (eg, parameter) is determined by the following equation (5A), (5B), (5C), or (5D):

number

[0296] In some embodiments, TIFF2025528069000165.tif13129, or TIFF2025528069000166.tif1239. In some embodiments, TIFF2025528069000167.tif13133 or TIFF2025528069000168.tif1240. In some embodiments, r=1, 2, ..., v ri In some embodiments, i t = 0, 1, …, 2L t -1. In some embodiments, f=0, 1, ..., M v In some embodiments, ft = 0, 1, …, M v In some embodiments, t=0, 1, ..., N-1. In some embodiments, t=1, 2, ..., N.

[0297] According to the above formula (5A), (5B), (5C), or (5D), the order of contribution to priority is {TRP index, FD base index or FD base index corresponding to TRP index, SD base index corresponding to TRP index, layer index}.

[0298] In a more specific example, the priority associated with each reported element is determined by the following equation (6A), (6B), (6C), or (6D):

number

number

number

number

[0299] In some embodiments, TIFF2025528069000173.tif13129 or TIFF2025528069000174.tif1241. In some embodiments, TIFF2025528069000175.tif13132 or TIFF2025528069000176.tif1240. In some embodiments, r=1, 2, ..., v ri In some embodiments, i t = 0, 1, …, 2L t -1. In some embodiments, f=0, 1, ..., M v In some embodiments, f t= 0, 1, …, M v In some embodiments, t=0, 1, ..., N-1. In some embodiments, t=1, 2, ..., N.

[0300] According to the above formula (6A), (6B), (6C) or (6D), the parameter corresponding to the first TRP may have the highest priority.

[0301] It should be understood that all the example embodiments described above do not imply any limitations and are for illustrative purposes only. The specific method for determining priority may be modified based on the teachings of the example embodiments described above, and such modified embodiments should also be considered within the scope of the present disclosure.

[0302] Furthermore, in some other embodiments, it is not necessary to determine a priority for each parameter. As explained above, terminal device 220 determines a first priority for each CSI-RS allocation among multiple CSI-RS allocations. In this case, terminal device 220 may include parameters in multiple partitions of the CSI feedback based on the respective first priorities. This approach makes the priority rules simpler.

[0303] In the following description, with reference to Figures 4A and 4B, examples are described regarding how parameters may be included in the various partitions of the feedback.

[0304] It should be clear that the following examples are described 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.

[0305] As shown in Figures 4A and 4B, 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 compared to the second partition. Alternatively, or in addition, in some embodiments, the payload size of the second partition is based on at least one indication in the first partition. Alternatively, or in addition, 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 compared to other information groups of the multiple information groups.

[0306] In some embodiments, the number of information groups included in the second partition may be greater than or equal to 3. When the number of information groups is 3, the CSI feedback can reuse the current CSI report structure. Alternatively, when the number of information groups is greater than 3, the CSI feedback structure becomes more feasible.

[0307] The first partition or the first information group of the second partition has a relatively high omission priority, so some relatively important parameters may be included in the first partition or the first information group.

[0308] Examples of relatively important parameters include, but are not limited to: a first index of a first allocation of the plurality of CSI-RS allocations; a second index of the first CSI-RS resource group containing the first allocation; a plurality of respective third indices of the plurality of CSI-RS assignments; the first number of non-zero coefficients corresponding to the first allocation, a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to multiple CSI-RS allocations, or A fourth number indication indicating the number of multiple CSI-RS allocations.

[0309] If the relatively important parameters are included in the first partition, the relatively important parameters can 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 can reuse the current structure of CSI Part 1.

[0310] In some embodiments, the first information group of the second partition further includes other parameters, including but not limited to: The strongest coefficient for the layer corresponding to the first CSI-RS allocation; The respective strongest coefficients for the layers corresponding to multiple CSI-RS allocations; at least one SD base corresponding to the first CSI-RS allocation; At least one SD rotation factor corresponding to the first CSI-RS allocation, or A fifth number of non-zero coefficients corresponding to the multiple CSI-RS allocations from which the first CSI-RS allocation is excluded.

[0311] In some embodiments, some relative secondary parameters may be included in other information groups of the second partition (other than the first information group, such as the second and third information groups shown in FIG. 4A).

[0312] Examples of relative secondary parameters include, but are not limited to: at least one resonance width factor associated with a plurality of CSI-RS allocations, including or excluding the first CSI-RS allocation; at least one co-phasing factor associated with a plurality of CSI-RS allocations, including or excluding the first CSI-RS allocation; Each strongest coefficient for a layer corresponding to multiple CSI-RS allocations with the first allocation excluded; at least one SD base corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations from which the first allocation is excluded; or At least one SD rotation factor corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations from which the first allocation is excluded.

[0313] In some embodiments, the non-zero coefficient information may also be included in other information groups of the second partition (i.e., the second and third information groups, rather than the first information group shown in FIG. 4A ). In some embodiments, the non-zero coefficient information indicates a bitmap that indicates associated non-zero coefficients, amplitude coefficients corresponding to the associated non-zero coefficients, or phase coefficients corresponding to the associated non-zero coefficients.

[0314] Furthermore, an associated non-zero coefficient may be associated with a CSI-RS allocation / allocation group / allocation set. In one particular embodiment, a non-zero coefficient is associated with multiple CSI-RS allocations (i.e., all TRPs). Alternatively, in another particular embodiment, a non-zero coefficient is associated with a first CSI-RS allocation (i.e., the first TRP) of the multiple CSI-RS allocations. Alternatively, in a further specific embodiment, a non-zero coefficient is associated with multiple CSI-RS allocations excluding the first CSI-RS allocation (also referred to as a subset of CSI-RS allocations). Alternatively, in a further particular exemplary embodiment, a non-zero coefficient is associated with a first CSI-RS resource group that includes the first CSI-RS allocation or a second CSI-RS allocation group that is different from the first CSI-RS allocation group.

[0315] Furthermore, non-zero coefficients associated with a particular CSI-RS assignment / allocation group / allocation set may have different priority levels, in which case parameters associated with the same CSI-RS assignment / allocation group / allocation set but with different priority levels may be included in different information groups.

[0316] 4A, the other information groups include 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 non-zero coefficients having a higher priority, and the third information group indicates second non-zero coefficient information corresponding to non-zero coefficients having a lower priority.

[0317] For better understanding, some examples regarding CSI feedback are provided below. In the following description, different partitions / information groups may be described separately. Therefore, some parameters may 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. That is, a general rule for including parameters in partitions / information groups is that parameters included in different partitions / information groups should not overlap or be repeated.

[0318] In some embodiments, the first partition (e.g., CSI Part 1) may indicate at least one of the following parameters: · Strongest TRP index, Number of TRPs, ·TRP index, An indication of the total number of non-zero amplitude / phase coefficients across the layers corresponding to the first TRP (e.g., TIFF2025528069000177.tif813), Indication of the total number of non-zero amplitude / phase coefficients across layers corresponding to multiple TRPs (e.g., K NZ ), Rank indicator (e.g., v ri ) CQI including wideband CQI and subband differential CQI.

[0319] 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: · Strongest TRP index, Number of TRPs, ·TRP index, An indication of the total number of non-zero amplitude / phase coefficients across the layers corresponding to the first TRP (e.g., TIFF2025528069000178.tif813), An indication of the total number of non-zero amplitude / phase coefficients across layers corresponding to multiple TRPs (e.g., K NZ ), The strongest coefficient for each layer corresponding to the first TRP, the field size is determined by ceil(log2(C(Pt / 2,2*Ls))), where L_s is the number of SD bases corresponding to the first TRP, Pt=N1*N2*2 or Pt=N1*N2*2 / N; The strongest coefficient for each layer of multiple TRPs, the field size is determined by ceil(log2(C(P / 2,2*L))), where L is the total number of SD bases, P is the number of ports, and is one of {2, 4, 8, 12, 16, 24, 32}. SD-based indicator corresponding to the first TRP (i.e., i 1,2,t ) and / or SD rotation factor (i.e., i 1,1,t ), SD-based indicators that support multiple TRPs (i.e., 1,2 ), SD rotation factors corresponding to multiple TRPs (i.e., i 1,1 ), An indication of the total number of non-zero amplitude / phase coefficients corresponding to a subset of TRPs (e.g., TIFF2025528069000179.tif816), i.e., multiple TRPs excluding the first TRP.

[0320] In some embodiments, the second information group of the second partition (e.g., group 0 of CSI part 2) may indicate at least one of the following parameters: The relative co-phase coefficients and / or relative amplitude coefficients between the TRPs (or multiple TRPs excluding the first TRP) may be included in Group 1. The strongest coefficients for each layer corresponding to one or all subsets of TRPs may be included in Group 1 (in case of SCI reporting per TRP). SD-based indicators corresponding to multiple TRPs (excluding the first TRP) 1,2,t ) and / or SD rotation factor (i 1,1,t ).

[0321] As explained above, the non-zero coefficient information may be represented in other information groups (i.e., instead of the first information group as shown in FIG. 4A, the second information group and the third information group, etc.) Some examples of other information groups are described below.

[0322] In some embodiments, one of the other information groups (e.g., the second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: The first bitmap (i.e., 1,7,r ) multiple highest priority elements (corresponding to multiple TRPs, i.e., all TRPs), > where the bitmap indicates whether amplitude / phase coefficients corresponding to multiple TRPs are reported or not, and the field size is 2*L*v ri *M v *N may also be used. > where the number of multiple highest priority elements in the bitmap is Y 1_1_1 It may be, for example, The file is TIFF2025528069000180.tif8123. Amplitude coefficient indicator (i.e., i 2,4,r ) a plurality of highest priority elements (e.g., a subset of a plurality of amplitude coefficients corresponding to a plurality of TRPs); where the number of highest priority elements of the subset of amplitude coefficients is, for example, TIFF2025528069000181.tif1594 (SCI between TRPs) or TIFF2025528069000182.tif15108 (SCI report per TRP). Phase coefficient indicator (i.e., i 2,5,r ) multiple highest priority elements (e.g., multiple subsets of phase coefficients corresponding to multiple TRPs). Here, the number of the highest priority elements of the subset of phase coefficients is, for example, TIFF2025528069000183.tif1598 (SCI between TRPs) or TIFF2025528069000184.tif16116 (SCI report for each TRP).

[0323] Alternatively, in some embodiments, another information group (e.g., a second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,s ) multiple highest priority elements (corresponding to the first TRP), > where the bitmap indicates whether the amplitude / phase coefficients corresponding to the first TRP are reported or not, and the field size is 2*L s *v ri *M v may be. > where the number of multiple highest priority elements in the bitmap is Y 1_2_1 It may be, for example, The file is TIFF2025528069000185.tif8102. Amplitude coefficient indicator (i 2,4,r,s ) a plurality of highest priority elements (e.g., a subset of a plurality of amplitude coefficients corresponding to a first TRP); > where the number of highest priority elements of the subset of amplitude coefficients is Y 2_2_1 It may be, for example, TIFF2025528069000186.tif1596, where The file is TIFF2025528069000187.tif862. Phase coefficient indicator (i2,5,r,s ) a plurality of highest priority elements (e.g., a subset of a plurality of phase coefficients corresponding to the first TRP); > where the number of highest priority elements of the subset of phase coefficients is Y 3_2_1 It may be, for example, The file is TIFF2025528069000188.tif16101.

[0324] Alternatively, in some embodiments, another information group (e.g., a second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: All elements of the bitmap (i 1,7,r,s ) (corresponding to the 1st TRP), > where the bitmap indicates whether the amplitude / phase coefficients corresponding to the first TRP are reported or not, and the field size is 2*L s *v ri *M v may be. Amplitude coefficient indicator (i 2,4,r,s ) (e.g., a plurality of amplitude coefficients corresponding to a first TRP, > where the number of amplitude coefficients is Y 2_4_1 It may be (for example) TIFF2025528069000189.tif859 or It could also be TIFF2025528069000190.tif859. Phase coefficient indicator (i 2,5,r,s ) (e.g., a plurality of phase coefficients corresponding to a first TRP), > where the number of phase coefficients is Y 3_4_1 It may be (for example) TIFF2025528069000191.tif859 or It could also be TIFF2025528069000192.tif858. FD-based indicators for each layer (i 1,6,r ), · Initial index of the FD base window (i 1,5 ), Reference amplitude for the weak polarization of each layer (i 2,3,r ).

[0325] In this way, all non-zero coefficient information of the first TRP can be prioritized.

[0326] Alternatively, in some embodiments, another information group (e.g., a second information group, e.g., Group 1 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,t1 ) (corresponding to the 1st TRP set including the 1st TRP), > where the bitmap indicates whether the amplitude / phase coefficients corresponding to the first TRP set are reported or not, and the field size is TIFF2025528069000193.tif1367 or It could also be TIFF2025528069000194.tif1367. Amplitude coefficient indicator (i 2,4,r,t1 ) (e.g., a plurality of amplitude coefficients corresponding to a first TRP set including a first TRP), > where the number of amplitude coefficients is It can also be TIFF2025528069000195.tif1176. For example, TIFF2025528069000196.tif860 (SCI between TRPs) or TIFF2025528069000197.tif17139, TIFF2025528069000198.tif1376 (SCI report for each TRP). TIFF2025528069000199.tif859 Phase Coefficient Indicator (i 2,5,r,t1 ) (e.g., a plurality of phase coefficients corresponding to a first TRP set including a first TRP), where the number of the fourth plurality of phase coefficients is Y 3_5_1 It may be, for example, TIFF2025528069000200.tif859, TIFF2025528069000201.tif960 (SCI between TRPs), TIFF2025528069000202.tif13102 or TIFF2025528069000203.tif1376 (SCI report for each TRP). FD-based indicators for each layer (i 1,6,r ), · Initial index of the FD base window (i 1,5 ), Reference amplitude for the weak polarization of each layer (i 2,3,r ).

[0327] In some embodiments, another information group (e.g., a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r ) multiple lowest priority elements (corresponding to multiple TRPs, i.e., all TRPs), > Here, the bitmap indicates whether amplitude / phase coefficients corresponding to multi-TRP are reported or not, and the field size may be 2*L*v_ri*M_v*N. > where the number of lowest priority elements in the bitmap is Y 1_1_2 It may be, for example, The file is TIFF2025528069000204.tif853. Amplitude coefficient indicator (i 2,4,r ) a plurality of lowest priority elements (e.g., a subset of a plurality of amplitude coefficients corresponding to a plurality of TRPs); where the number of lowest priority elements of the subset of amplitude coefficients is Y 2_1_2 It may be, for example, TIFF2025528069000205.tif15104 (SCI between TRPs) or TIFF2025528069000206.tif14115 (SCI report for each TRP). Phase coefficient indicator (i 2,5,r) a plurality of lowest priority elements (e.g., a subset of a plurality of phase coefficients corresponding to a plurality of TRPs); > Here, the number of lowest priority elements among the phase coefficients is Y 3_1_2 It may be, for example, TIFF2025528069000207.tif15104 (SCI between TRPs) or TIFF2025528069000208.tif14116 (SCI report for each TRP).

[0328] Alternatively, in some embodiments, another information group (e.g., a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,s ) multiple lowest priority elements (corresponding to the first TRP), > where the bitmap indicates whether the amplitude / phase coefficients corresponding to the first TRP are reported or not, and the field size is 2*L s *v ri *M v may be. > where the number of lowest priority elements in the bitmap is Y 1_2_2 It may be, for example, The file is TIFF2025528069000209.tif853. Amplitude coefficient indicator (i 2,4,r,s ) a plurality of lowest priority elements (e.g., a subset of a plurality of amplitude coefficients corresponding to the first TRP); > where the number of lowest priority elements of the subset of amplitude coefficients is Y 2_2_2 It may be, for example, The file is TIFF2025528069000210.tif18128. Phase coefficient indicator (i 2,5,r,s ) a plurality of lowest priority elements (e.g., a subset of a plurality of phase coefficients corresponding to the first TRP); > where the number of lowest priority elements of the subset of phase coefficients is Y 3_2_2 It may be, for example, The file is TIFF2025528069000211.tif18129.

[0329] Alternatively, in some embodiments, another information group (e.g., a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,t ) (corresponding to a subset of TRPs, i.e., TRPs excluding the first TRP) may be included in Group 2. > where the bitmap indicates whether amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size may be 2*L_t*(N-1)*v_ri*M_v. > where the number of multiple highest priority elements in the bitmap is Y 1_3_1 For example, The file is TIFF2025528069000212.tif8148. Amplitude coefficient indicator (i 2,4,r,t ) a plurality of highest priority elements (e.g., t≠s) of the TRP (e.g., a first subset of a plurality of amplitude coefficients corresponding to a subset of the TRP) > where the number of highest priority elements of the subset of amplitude coefficients is Y 2_3_1 It may be, for example, TIFF2025528069000213.tif16139 (SCI report for each TRP) or TIFF2025528069000214.tif1753 (SCI between TRPs). Phase coefficient indicator (i 2,5,r,t ) (e.g., a subset of a plurality of phase coefficients corresponding to a subset of TRPs) > where the number of highest priority elements of the subset of phase coefficients is Y 3_3_1 It may be, for example, TIFF2025528069000215.tif16140 (SCI report for each TRP) or TIFF2025528069000216.tif1547 (SCI between TRPs).

[0330] Alternatively, in some embodiments, another information group (e.g., a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,t ) (e.g., t≠s) (corresponding to a subset of TRPs, e.g., TRPs excluding the first TRP), > where the bitmap indicates whether amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size is 2*L t *(N-1)*v ri *M v may be. Amplitude coefficient indicator (i 2,4,r,t ) (e.g., t≠s) (e.g., multiple amplitude coefficients corresponding to a subset of TRPs), > where the number of amplitude coefficients is Y 2_4_2 It may be, for example, TIFF2025528069000217.tif8125 (SCI report for each TRP) or TIFF2025528069000218.tif843 (SCI between TRPs). Phase coefficient indicator (i 2,5,r,t ) (e.g., t ≠ s) (e.g., multiple phase coefficients corresponding to subsets of TRPs) > where the number of phase coefficients is Y 3_4_2 It may be, for example, TIFF2025528069000219.tif8124 (SCI report for each TRP) or TIFF2025528069000220.tif844 (SCI between TRPs).

[0331] Alternatively, in some embodiments, another information group (e.g., a third information group, e.g., Group 2 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,t2 ) (corresponding to a second TRP set that is different from the first TRP set containing the first TRP) > where the bitmap indicates whether the amplitude / phase coefficients corresponding to a set of TRPs are reported or not, and the field size is TIFF2025528069000221.tif1367 or It could also be TIFF2025528069000222.tif1367. Amplitude coefficient indicator (i 2,4,r,t2 ) (e.g., a plurality of amplitude coefficients corresponding to a second set of TRPs), > where the number of amplitude coefficients is Y 2_5_2 It may be, for example, TIFF2025528069000223.tif13108, TIFF2025528069000224.tif1798 (SCI report for each TRP) or TIFF2025528069000225.tif848 (SCI between TRPs). Phase coefficient indicator (i 2,5,r,t2 ) (e.g., multiple phase coefficients corresponding to a second set of TRPs) > where the number of phase coefficients is Y 3_5_2 It may be, for example, TIFF2025528069000226.tif13103, TIFF2025528069000227.tif1377 (SCI report for each TRP) or TIFF2025528069000228.tif842 (SCI between TRPs).

[0332] As explained 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.

[0333] In some embodiments, another information group (e.g., a fourth information group, e.g., Group 3 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,t ) (corresponding to a subset of TRPs, i.e., TRPs excluding the first TRP), > where the bitmap indicates whether amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size is 2*L t *(N-1)*v ri *M v may be. > where the number of lowest priority elements in the bitmap is Y 1_3_2 It may be, for example, The file is TIFF2025528069000229.tif1446. Amplitude coefficient indicator (i 2,4,r,t ) (e.g., a subset of amplitude coefficients corresponding to a subset of TRPs) > where the number of lowest priority elements of the subset of amplitude coefficients is Y 2_3_2 It may be, for example, TIFF2025528069000230.tif16147 (SCI report for each TRP) or TIFF2025528069000231.tif1752 (SCI between TRPs). Phase coefficient indicator (i 2,5,r,t ) (e.g., a subset of a plurality of phase coefficients corresponding to a subset of TRPs), > where the number of lowest priority elements of the subset of phase coefficients is Y 3_3_2 It may be, for example, TIFF2025528069000232.tif15142 (SCI report for each TRP) or TIFF2025528069000233.tif1546 (SCI between TRPs).

[0334] Alternatively, in some embodiments, another information group (e.g., a fourth information group, e.g., Group 3 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,t ) (corresponding to a subset of TRPs, i.e., multiple TRPs excluding the first TRP) > where the bitmap indicates whether amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size is 2*L t *(N-1)*v ri *M v may be. > where the number of multiple highest priority elements in the bitmap is Y 1_3_1 It may be, for example, The file is TIFF2025528069000234.tif9148. Amplitude coefficient indicator (i 2,4,r,t ) a plurality of highest priority elements (e.g., t≠s) of (e.g., a subset of a plurality of amplitude coefficients corresponding to a subset of TRPs); > where the number of highest priority elements of the subset of amplitude coefficients is Y 2_3_1 It may be, for example, TIFF2025528069000235.tif17148 (SCI report for each TRP) or TIFF2025528069000236.tif1444 (SCI between TRPs). Phase coefficient indicator (i 2,5,r,t ) (e.g., a subset of a plurality of phase coefficients corresponding to a subset of TRPs), where the number of highest priority elements of the subset of the third plurality of phase coefficients is Y 3_3_1 It may be, for example, TIFF2025528069000237.tif15136 (SCI report for each TRP) or TIFF2025528069000238.tif1446 (SCI between TRPs).

[0335] Alternatively, in some embodiments, another information group (e.g., a fourth information group, e.g., Group 3 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,s ) multiple lowest priority elements (corresponding to the first TRP), > where the bitmap indicates whether the amplitude / phase coefficients corresponding to the first TRP are reported or not, and the field size is 2*L s *v ri *M v may be. > where the number of lowest priority elements in the bitmap is Y 1_2_2 It may be, for example, The file is TIFF2025528069000239.tif854. Amplitude coefficient indicator (i 2,4,r,s ) a plurality of lowest priority elements (e.g., a subset of a plurality of amplitude coefficients corresponding to the first TRP); > where the number of lowest priority elements of the subset of amplitude coefficients is Y 2_2_2 It may be, for example, The file is TIFF2025528069000240.tif18128. Phase coefficient indicator (i 2,5,r,s ) a plurality of lowest priority elements (e.g., a subset of a plurality of phase coefficients corresponding to the first TRP); > where the number of lowest priority elements of the subset of phase coefficients is Y 3_2_2 It may be, for example, The file is TIFF2025528069000241.tif18128.

[0336] Alternatively, in some embodiments, another information group (e.g., the fifth information group, e.g., Group 4 of CSI Part 2) may indicate at least one of the following parameters / elements: Bitmap (i 1,7,r,t) (corresponding to a subset of TRPs, i.e., TRPs excluding the first TRP), > where the bitmap indicates whether amplitude / phase coefficients corresponding to a subset of TRPs are reported or not, and the field size is 2*L t *(N-1)*v ri *M v may be. where the number of the second plurality of lowest priority elements of the third bitmap is Y 1_3_2 It may be, for example, The file is TIFF2025528069000242.tif1446. Amplitude coefficient indicator (i 2,4,r,t ) (e.g., a subset of a plurality of amplitude coefficients corresponding to a subset of TRPs), > where the number of lowest priority elements of the subset of amplitude coefficients is Y 2_3_2 It may be, for example, TIFF2025528069000243.tif15146 (SCI report for each TRP) or TIFF2025528069000244.tif1649 (SCI between TRPs). Phase coefficient indicator (i 2,5,r,t ) (e.g., a subset of a plurality of phase coefficients corresponding to a subset of TRPs), > where the number of lowest priority elements of the subset of phase coefficients is Y 3_3_2 It may be, for example, TIFF2025528069000245.tif15140 (SCI report for each TRP) or TIFF2025528069000246.tif1545 (SCI between TRPs).

[0337] The above examples are described with respect to specific information groups. Below, some examples with respect to specific combinations of information groups are described. Furthermore, in the following examples, the priority levels include a highest priority and a 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.

[0338] 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.

[0339] 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 / or based on the layer index, and may further calculate a priority based on the TRP 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 further calculate a priority based on the TRP index.

[0340] In some embodiments, the SD base index may correspond to the first base index or the second base index.

[0341] In some embodiments, the FD-based index may correspond to a third-based index, or an FD-based index, or an FD-based index that corresponds to a TRP index.

[0342] In some embodiments, terminal device 220 may first calculate priorities 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 TRP index, and then calculate further priorities based on an SD base index or an FD base index, respectively. In some embodiments, terminal device 220 may divide at least one of a bitmap (indicating non-zero amplitude coefficients and / or non-zero phase coefficients), a plurality of amplitude coefficients, and a plurality of phase coefficients into two groups (e.g., a first group and a second group) based on the priorities calculated based on the layer index and the TRP 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 a remaining portion) of bits of the bitmap, a second subset (or a remaining portion) of amplitude coefficients, and a second subset (or a remaining portion) of phase coefficients having a lower priority. 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 at least one of the FD-based index and / or the layer index and the SD-based index.

[0343] 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 priorities calculated based on at least one of the FD base index and / or the layer index and the SD base index. For example, the first subgroup may include a first subgroup of bits of the first subset of bitmap, a first subgroup of the first subset of amplitude coefficients, and a first subgroup of the first subset of phase coefficients with a higher priority, and the second subgroup may include a second subgroup (or the remainder) of bits of the first subset of bitmap, a second subgroup (or the remainder) of the first subset of amplitude coefficients, and a second subgroup (or the remainder) of the first subset of phase coefficients with a lower priority. As another example, the third subgroup may include a first subgroup of the second subset of bits of the bitmap, a first subgroup of the second subset of amplitude coefficients, and a first subgroup of the second subset of phase coefficients having a higher priority, and the fourth subgroup may include a second subgroup (or the remainder) of the second subset of bits of the bitmap, a second subgroup (or the remainder) of the second subset of amplitude coefficients, and a second subgroup (or the remainder) of the second subset of phase coefficients having a lower priority.

[0344] In some embodiments, the terminal device 220 may calculate the priority based on the layer indexes, SD base indexes, and FD base indexes of the first and second groups according to the following equation (7-1).

number

[0345] In some embodiments, the terminal device 220 may calculate the priorities of the first and second subgroups and / or the third and fourth subgroups based on the TRP index using the following equation (7-2) or (7-3):

number

[0346] In some embodiments, the terminal device 220 may calculate the priority based on the layer index, the SD base index, and the TRP index of the first and second groups according to the following equation (7-4):

number

[0347] In some embodiments, the terminal device 220 may calculate the priorities of the first and second subgroups and / or the third and fourth subgroups based on the FD base index using the following equations (7-5) or (7-6):

number

[0348] In some embodiments, the terminal device 220 may calculate the priority based on the layer index, the FD base index, and the TRP index of the first and second groups according to the following equation (7-7):

number

[0349] In some embodiments, the terminal device 220 may calculate the priorities of the first and second subgroups and / or the third and fourth subgroups based on the SD base index using the following equations (7-8) or (7-9):

number

[0350] In a particular embodiment, terminal device 220 may first calculate priorities based on the FD base index and / or the SD base index and / or the layer index. Based on the calculated priorities, 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). Terminal device 220 may further calculate priorities for each of Group #1 and Group #2 based on the TRP 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 having the highest / higher FD priority and the highest / higher TRP priority), a second subgroup (represented as group #1-2) (e.g., a subgroup having the highest / higher FD priority and the lowest / lower TRP priority), a third subgroup (represented as group #2-1) (e.g., a subgroup having the lowest / lower FD priority and the highest / higher TRP priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup having the lowest / lower FD priority and the lowest / lower TRP priority).

[0351] In some embodiments, terminal device 220 may calculate the priority based on the FD base index according to the following equations (7-10):

number

[0352] The terminal device 220 also calculates the priority based on the TRP index using the following equation (7-11).

number

[0353] In a particular embodiment, terminal device 220 may first calculate priorities based on the TRP index and / or the SD base index and / or the layer index. Based on the calculated priorities, the parameters may be divided into a highest / higher TRP priority group (represented as Group #1) and a lowest / lower TRP priority group (represented as Group #2). Terminal device 220 may further calculate priorities for each of Group #1 and Group #2 based on the 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 having the highest / higher TRP or SD priority and the highest / higher FD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup having the highest / higher TRP or SD priority and the lowest / lower FD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup having the lowest / lower TRP or SD priority and the highest / higher FD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup having the lowest / lower TRP or SD priority and the lowest / lower FD priority).

[0354] In a particular embodiment, terminal device 220 may first calculate priorities based on the TRP index and / or the FD base index and / or the layer index. Based on the calculated priorities, the parameters may be divided into a highest / higher TRP or FD or layer priority group (represented as Group #1) and a lowest / lower TRP or FD or layer priority group (represented as Group #2). Terminal device 220 may further calculate priorities for each of Group #1 and Group #2 based on the SD base index. For example, based on the calculated priorities, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup having the highest / higher FD or TRP priority and the highest / higher SD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup having the highest / higher FD or TRP priority and the lowest / lower SD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup having the lowest / lower FD or TRP priority and the highest / higher SD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup having the lowest / lower FD or TRP priority and the lowest / lower SD priority).

[0355] In a particular embodiment, terminal device 220 may first calculate priorities based on the SD-based index and / or layer index. Based on the calculated priorities, 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). Terminal device 220 may further calculate priorities for each of Group #1 and Group #2 based on the FD-based index and / or the TRP-based index. For example, based on the calculated priorities, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup having the highest / higher SD or layer priority and the highest / higher FD or TRP priority), a second subgroup (represented as group #1-2) (e.g., a subgroup having the highest / higher SD or layer priority and the lowest / lower FD or TRP priority), a third subgroup (represented as group #2-1) (e.g., a subgroup having the lowest / lower SD or layer priority and the highest / higher FD or TRP priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup having the lowest / lower SD or layer priority and the lowest / lower FD or TRP priority).

[0356] In a particular embodiment, terminal device 220 may first calculate priorities based on the FD-based index and / or layer index. Based on the calculated priorities, 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). Terminal device 220 may further calculate priorities for each of Group #1 and Group #2 based on the SD-based index and / or the TRP-based index. For example, based on the calculated priorities, the parameters may be divided into a first subgroup (represented as group #1-1) (e.g., a subgroup having the highest / higher FD or layer priority and the highest / higher SD or TRP priority), a second subgroup (represented as group #1-2) (e.g., a subgroup having the highest / higher FD or layer priority and the lowest / lower SD or TRP priority), a third subgroup (represented as group #2-1) (e.g., a subgroup having the lowest / lower FD or layer priority and the highest / higher SD or TRP priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup having the lowest / lower FD or layer priority and the lowest / lower SD or TRP priority).

[0357] In a particular embodiment, terminal device 220 may first calculate priorities based on the TRP-based index and / or layer index. Based on the calculated priorities, the parameters may be divided into a highest / higher TRP or layer priority group (represented as Group #1) and a lowest / lower TRP or layer priority group (represented as Group #2). Terminal device 220 may further calculate priorities for each of Group #1 and Group #2 based on the FD-based index and / or the SD-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 having the highest / higher TRP or layer priority and the highest / higher FD or SD priority), a second subgroup (represented as group #1-2) (e.g., a subgroup having the highest / higher TRP or layer priority and the lowest / lower FD or SD priority), a third subgroup (represented as group #2-1) (e.g., a subgroup having the lowest / lower TRP or layer priority and the highest / higher FD or SD priority), and a fourth subgroup (represented as group #2-2) (e.g., a subgroup having the lowest / lower TRP or layer priority and the lowest / lower FD or SD priority).

[0358] In some embodiments, terminal device 220 may first calculate priorities based on the first (or second) base index (third base index or TRP index) and / or layer index. Based on the calculated priorities, the parameters may be divided into a highest / high-priority group (represented as group #1) and a lowest / low-priority group (represented as group #2). Terminal device 220 may secondly calculate priorities for each of group #1 and group #2 based on the third base index (or TRP index or first (or second) 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). The terminal device 220 may calculate a third priority for each of the subgroups #1-1, #1-2, #2-1, and #2-2 based on the TRP index (or the first (or second) base index, or the third 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).

[0359] In some embodiments, terminal device 220 may first calculate priorities based on the TRP index and / or layer index. Based on the calculated priorities, the parameters may be divided into a highest / high-priority group (represented as group #1) and a lowest / low-priority group (represented as group #2). Terminal device 220 may secondly calculate priorities for each of group #1 and group #2 based on the FD-based index (or SD-based index) and / or layer 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). Terminal device 220 may thirdly calculate priorities for each of subgroup #1-1, subgroup #1-2, subgroup #2-1, and subgroup #2-2 based on the SD-based index (or FD-based index) and / or layer index. For example, based on the calculated priorities, 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).

[0360] In some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameters of the first TRP; · Third information group (e.g., CSI group 2): The lowest priority parameters of the first TRP and all parameters of a subset of TRPs (excluding the first TRP).

[0361] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): all parameters of the first TRP, Third information group (e.g., CSI group 2): all parameters of a subset of TRPs (i.e., multiple TRPs excluding the first TRP).

[0362] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): all parameters of the first TRP set (including the first TRP); · Third information group (e.g., CSI group 2): all parameters of the second TRP set (not including the first TRP).

[0363] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameters of the first TRP; Third information group (e.g., CSI group 2): the lowest priority parameters of the first TRP and the highest priority parameters of a subset of TRPs (i.e., multiple TRPs excluding the first TRP); · Fourth Information Group (e.g., CSI Group 3): The lowest priority parameters of a subset of TRPs.

[0364] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameters of the first TRP; Third information group (e.g., CSI group 2): the lowest priority parameters of the first TRP; Fourth information group (e.g., CSI group 3): highest priority parameters of a subset of TRPs; · Fifth Information Group (e.g., CSI Group 4): The lowest priority subset of TRPs.

[0365] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameters of the first TRP; Third information group (e.g., CSI group 2): the highest priority parameters of a subset of TRPs (i.e., TRPs excluding the first TRP); Fourth information group (e.g., CSI group 3): the lowest priority parameters of the first TRP; · Fifth Information Group (e.g., CSI Group 4): The lowest priority parameters of a subset of TRPs.

[0366] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameters of the first TRP set (i.e., the first TRP set including the first TRP); Third information group (e.g., CSI group 2): the highest priority parameters of the second TRP set; Fourth information group (e.g., CSI group 3): the lowest priority parameters of the first TRP set; · Fifth information group (e.g., CSI group 4): The lowest priority parameters of the second TRP set.

[0367] Alternatively, in some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameters of the first TRP set (i.e., the first TRP set including the first TRP); Third information group (e.g., CSI group 2): the lowest priority parameters of the first TRP set; Fourth information group (e.g., CSI group 3): the highest priority parameters of the second TRP set (i.e., a second TRP set different from the first TRP set); · Fifth information group (e.g., CSI group 4): The lowest priority parameters of the second TRP set.

[0368] In some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameter of the TRP with index 0; Third information group (e.g., CSI group 2): the lowest priority parameters of the TRP with index 0; Fourth information group (e.g., CSI group 3): the highest priority parameter of the TRP with index 1; Fifth information group (e.g., CSI group 4): the lowest priority parameters of the TRP with index 1; Information Group #(2*N) (e.g., CSI Group 2*(N-1)+1): the highest priority parameter of the TRP with index N-1; Information Group #(2*N-1) (e.g., CSI Group 2*(N-1)): The lowest priority parameter of the TRP with index N-1.

[0369] In some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameter of the TRP with index 0; Third information group (e.g., CSI group 2): the highest priority parameter of the TRP with index 1; Information Group #(N+1) (e.g., CSI Group N): the highest priority parameter of the TRP with index N-1; Information Group #(N+2) (e.g., CSI Group N+1): the lowest priority parameter of the TRP with index 0; Information Group #(N+3) (e.g., CSI Group N+2): the lowest priority parameter of the TRP with index 1; Information Group #(2*N-1) (e.g., CSI Group 2*(N-1)): The lowest priority parameter of the TRP with index N-1.

[0370] In some embodiments, for a given CSI feedback, the correspondence between the parameters of the second partition and other information groups (eg, CSI part 2) may be defined as follows: Second information group (e.g., CSI group 1): the highest priority parameters of the TRP with index s, i.e., the first TRP; Third information group (e.g., CSI group 2): the lowest priority parameter of the TRP with index s; Fourth information group (e.g., CSI group 3): the highest priority parameters of the TRP in ascending order of index t_s (where t_s is {0, 1, 2, …N-1} excluding s); Fifth information group (e.g., CSI group 4): lowest priority TRPs in ascending order of index t_s (where t_s is {0, 1, 2, …N-1} excluding s); etc.

[0371] It should be understood that the above examples do not imply any limitation and are presented for illustrative purposes only.

[0372] In some embodiments, the CSI feedback includes multiple CSI reports, each CSI report corresponding to a respective CSI-RS assignment of the multiple CSI-RS assignments. FIG. 4B illustrates an example block of CSI feedback 450 in accordance with some embodiments of the present disclosure, where CSI feedback 450 includes multiple CSI reports.

[0373] In some embodiments, each CSI report indicates at least one of the following: At least one SD base for each allocation; At least one SD rotation factor corresponding to each CSI-RS allocation; At least one amplitude coefficient corresponding to each CSI-RS allocation; At least one phase factor corresponding to each CSI-RS allocation; At least one resonance width factor corresponding to each CSI-RS allocation; At least one co-phase coefficient corresponding to each CSI-RS allocation; the number of non-zero coefficients corresponding to each CSI-RS allocation; A bitmap of non-zero coefficients, or The strongest coefficient for each layer corresponding to each allocation.

[0374] In some embodiments, if a CSI report among the plurality of CSI reports corresponds to a first CSI-RS allocation (i.e., a first TRP), the CSI report further indicates at least one of an RI, a CQI, and the number of the plurality of CSI-RS allocations.

[0375] In some embodiments, terminal device 220 determines a third priority for each CSI report of the at least one CSI report, such that the at least one CSI report may be included in multiple partitions. In a particular embodiment, the third priority is determined based on an index of a CSI-RS allocation corresponding to the respective CSI report. Alternatively, in another particular embodiment, the third priority is determined based on a type of the respective CSI report.

[0376] In some embodiments, the type of each CSI report is one of a CSI report of a CJT, a CSI report of a single-TRP transmission assumption, a CSI report of a multi-TRP transmission assumption, or a CSI report of an NCJT.

[0377] In a specific embodiment, for CJTCSI feedback, there may be a set of CSI / PMI reports. The number of CSI / PMI reports is N (i.e., the same as the number of TRPs), and each CSI / PMI report corresponds to one TRP. In this specific embodiment, each CSI / PMI report includes at least one of the following: an SD base corresponding to one TRP, an SD rotation corresponding to one TRP, an amplitude / coefficient corresponding to the TRP, and a phase coefficient corresponding to the TRP; and further includes at least one of the number of non-zero coefficients corresponding to the TRP, a bitmap of non-zero coefficients corresponding to the TRP, an ab SCI corresponding to the TRP, and a base co-phase / amplitude corresponding to the TRP (associated with the first TRP).

[0378] Furthermore, in this particular embodiment, the CSI / PMI report corresponding to the first TRP may further include the CQI, RI, SCI corresponding to the first TRP, and at least one of the strongest TRP index, the number of TRPs, the total number of non-zero coefficients (TRPs), a bitmap of non-zero coefficients (among TRPs), and base co-phase / amplitude coefficients corresponding to a subset of TRPs (i.e., TRPs excluding the first TRP).

[0379] In a particular embodiment, the CSI / PMI report corresponding to the first TRP has a higher priority than other CSI / PMI reports, and the priority of the other CSI / PMI reports may be determined based on the TRP 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 TRP.

[0380] In some embodiments, if the number of the plurality of CSI-RS allocations is equal to 1, terminal device 220 transmits CSI feedback via a first uplink resource. Alternatively, if the number of the plurality of CSI-RS allocations is greater than 1, terminal device 220 transmits CSI feedback via a second uplink resource, where either the first or second uplink resource is one of a PUSCH resource or a PUCCH resource.

[0381] In some embodiments, the at least one configuration of the CSI feedback indicates a first uplink resource and a second uplink resource.

[0382] In some embodiments, a first CSI report carrying CSI of the CJT (or a first CSI report with a number of TRPs greater than 1, or a first CSI report with an indicator indicating multi-TRP) may have a higher priority than a second CSI report not carrying CSI of the CJT (or a second CSI report with a number of TRPs equal to 1, or a second CSI report with an indicator indicating single-TRP).

[0383] Alternatively, in some embodiments, the first CSI report carrying CSI of the CJT (or the first CSI report with a number of TRPs greater than one, or the first CSI report with an indicator indicating multi-TRP) may have a higher priority (or a lower priority) than the third CSI report carrying L1-RSRP or L1-SINR (periodic, semi-persistent, aperiodic).

[0384] In some embodiments, when terminal device 220 is configured / instructed to report a first CSI for CJT, terminal device 220 may not report a second CSI (which does not carry CSI for CJT and / or does not carry L1-RSRP or L1-SINR), in which case the time resources of the first CSI and the time resources of the second CSI may collide or overlap and / or may be on the same carrier.

[0385] In some embodiments, if the terminal device 220 is configured / indicated to report the first CSI of the CJT, and if the first CSI of the CJT indicates a single TRP hypothesis or indicates that the number of TRPs is 1, the first CSI may correspond to the first priority, and if the first CSI of the CJT indicates a multi-TRP hypothesis or indicates that the number of TRPs is greater than 1, the first CSI may correspond to the second priority.

[0386] In some embodiments, a parameter may be introduced to determine a priority rule for CSI reporting in the CJT. Specifically, if the first CSI indicates a single-TRP hypothesis or the number of TRPs is equal to one, a first value is applied to the parameter, and if the first CSI in the CJT indicates a multi-TRP hypothesis or the number of TRPs is greater than one, a second value is applied to the parameter. In a particular embodiment, the first value is greater than or less than the second value. Alternatively, the first priority may be higher or lower than the second priority.

[0387] In some embodiments, terminal device 220 can report the number of selected TRPs or an indication of single or multi-TRP transmission (i.e., CJT). In some embodiments, the resources used for CSI feedback (e.g., PUCCH resource IDs and PUCCH / PUSCH time / frequency resource sizes) vary depending on the number of selected TRPs or the indication of single or multi-TRP transmission.

[0388] In some embodiments, the first resource used for CSI feedback for the single-TRP hypothesis may be smaller than the second resource used for CSI feedback for the multi-TRP hypothesis.

[0389] In some embodiments, a first size of a first resource used for CSI feedback for a first number of selected TRPs (denoted as S1, where S1 is a positive integer) may be smaller than a second resource used for CSI feedback for a second number of selected TRPs (denoted as S2, where S2 is a positive integer), where S1 <S2である。

[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, a combination of PUCCH and PUSCH resources may be used for CSI feedback. In some embodiments, for CJTCSI feedback, a subset of PMIs or a subset of CSI for CJTs may be reported on PUCCH resources. In a particular embodiment, the subset of PMIs or the subset of CSI may include at least one of CSI Part 1, Group 0 of CSI Part 2. Alternatively, in another particular embodiment, the subset of PMIs or the subset of CSI may include at least one of an SD base indication, an SD rotation indication, the number of selected TRPs, an index of the selected TRPs, an indication of single TRP or multiple TRPs, a strongest TRP index, and an RI.

[0392] Thus, in some embodiments, other PMIs or other subsets of CSI for the CJT are reported on the PUSCH, and the CSI report for the CJT carried on the PUSCH may be calculated based on the most recent CSI report for the CJT carried on the PUCCH (e.g., PUCCH format 3 or 4). Alternatively, in some embodiments, all PMIs or CSI for the CJT in their entirety may be reported on the PUSCH.

[0393] In some embodiments, when the terminal device reports CSI feedback for the CJT (e.g., when reporting the number of selected TRPs or reporting an indication of single or multiple TRPs), the TCI status indication for PDSCH scheduling and / or the TCI status for downlink transmission may be based on the CSI (based on the number or indicator of selected TRPs).

[0394] For example, if the number of selected TRPs is 1 or the indication indicates a single TRP assumption, the TCI state indication for PDSCH scheduling and / or the TCI state for downlink transmission is a single TRP or one TCI state is indicated.

[0395] As another example, if the number of selected TRPs is greater than one or if the indication indicates a multi-TRP assumption, the TCI state indication for PDSCH scheduling and / or the TCI state for downlink transmission may be multi-TRP or multiple TCI states may be indicated.

[0396] <Embodiments of the Method> 5 illustrates a flowchart of an example method 500 according to some embodiments of the present disclosure. For example, the method 500 may be implemented in the terminal device 220, as shown in FIG. 2A.

[0397] In block 510, terminal device 220 receives at least one configuration for CSI feedback from network device 210.

[0398] At block 520, terminal device 220 transmits CSI feedback to network device 210 based on the at least one configuration, where the CSI feedback includes multiple partitions with different omission priorities, the multiple partitions including parameters associated with one or more CSI-RS allocations of the multiple CSI-RS allocations.

[0399] In some embodiments, terminal device 220 determines priorities including at least one of a respective first priority for a CSI-RS allocation among a plurality of CSI-RS allocations or a respective second priority for a parameter among a plurality of parameters included in the CSI feedback. Terminal device 220 generates the CSI feedback based on the priorities. In other words, terminal device 220 disables the CSI feedback by including the parameter in a plurality of partitions of the CSI feedback based on the priorities.

[0400] In some embodiments, terminal device 220 determines the priority based on the index of the CSI-RS resource.

[0401] Alternatively or additionally, in some embodiments, terminal device 220 determines the priority based on the index of the CSI-RS resource group.

[0402] Alternatively or additionally, in some embodiments, terminal device 220 determines the priority based on the index of the CSI-RS port group.

[0403] Alternatively or additionally, in some embodiments, terminal device 220 determines the priority based on an SD-based index.

[0404] In some embodiments, different factors are assigned different contributions when determining the priority.

[0405] In some embodiments, terminal device 220 prioritizes parameters associated with a first CSI-RS allocation among multiple CSI-RS allocations.

[0406] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with the first CSI-RS allocation group that includes the first CSI-RS allocation.

[0407] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with a first group of CSI-RS ports corresponding to the first CSI-RS allocation.

[0408] Alternatively or additionally, in some embodiments, terminal device 220 prioritizes parameters associated with the second CSI-RS port group corresponding to the first CSI-RS allocation group.

[0409] In some embodiments, the first CSI-RS allocation corresponds to a primary TRP.

[0410] Alternatively or additionally, in some embodiments, the first CSI-RS allocation corresponds to a TRP having an index value of 0.

[0411] Alternatively or additionally, in some embodiments, the first CSI-RS allocation corresponds to the TRP with the strongest amplitude coefficient.

[0412] Alternatively or additionally, in some embodiments, the first CSI-RS allocation corresponds to the TRP with the highest power.

[0413] 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 compared to the second partition. The first partition indicates at least one of: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0414] In some embodiments, the plurality of partitions include at least a first partition and a second partition, and the 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: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group that includes the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0415] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition including a plurality of information groups, wherein a first information group of the plurality of information groups is configured to have a higher skip priority compared to other information groups of the plurality of information groups, and the first information group of the second partition indicates at least one of: a first index of a first CSI-RS allocation of the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indicator indicating the number of the plurality of CSI-RS allocations.

[0416] In some embodiments, the first information group of the second partition indicates the strongest coefficient for the layer corresponding to the first CSI-RS allocation.

[0417] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates respective strongest coefficients for layers corresponding to multiple CSI-RS allocations.

[0418] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD base corresponding to the first CSI-RS allocation.

[0419] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD rotation factor corresponding to the first CSI-RS allocation.

[0420] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates a fifth number of non-zero coefficients corresponding to a plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0421] In some embodiments, another information group of the plurality of information groups indicates at least one resonance width factor associated with the plurality of CSI-RS allocations that include or exclude the first CSI-RS allocation.

[0422] Alternatively or additionally, in some embodiments, another information group of the plurality of information groups indicates at least one co-phase factor associated with the plurality of CSI-RS allocations that include or exclude the first CSI-RS allocation.

[0423] Alternatively or additionally, in some embodiments, other information groups of the plurality of information groups indicate respective strongest coefficients for layers corresponding to the plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0424] Alternatively or additionally, in some embodiments, other information groups of the plurality of information groups indicate at least one spatial domain (SD) base corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0425] Alternatively or additionally, in some embodiments, another information group of the plurality of information groups indicates at least one SD rotation factor corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0426] In some embodiments, another information group of the plurality of information groups indicates non-zero coefficient information, and the non-zero coefficient information indicates at least one of a bitmap indicating a non-zero coefficient, a non-zero coefficient associated with a first CSI-RS allocation of the plurality of CSI-RS allocations, the plurality of CSI-RS allocations excluding the first CSI-RS allocation, a first CSI-RS allocation group including the first CSI-RS allocation, or a second CSI-RS allocation group different from the first CSI-RS allocation group, an amplitude coefficient corresponding to the non-zero coefficient, and a phase coefficient corresponding to the non-zero coefficient.

[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 omission priority compared to 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 CSI report of the plurality of CSI reports corresponding to a respective CSI-RS allocation of the plurality of CSI-RS allocations.

[0430] In some embodiments, terminal device 220 determines a third priority for each CSI report based on an index of a CSI-RS allocation corresponding to each CSI report of the at least one CSI report.

[0431] Alternatively or additionally, in some embodiments, terminal device 220 determines a third priority for each CSI report based on a type of each CSI report of the at least one CSI report.

[0432] In some embodiments, the type of each CSI report is one of a CSI report for a CJT, a CSI report for a single-TRP transmission assumption, a CSI report for a multi-TRP transmission assumption, or an NCJT.

[0433] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0434] In some embodiments, if a CSI report of the plurality of CSI reports corresponds to a first CSI-RS allocation of the plurality of CSI-RS allocations, the CSI report indicates at least one of an RI, a CQI, and a number of the plurality of CSI-RS allocations.

[0435] In some embodiments, if the number of CSI-RS allocations is equal to one, terminal device 220 transmits CSI feedback over the first uplink resource.

[0436] In some embodiments, if the number of CSI-RS allocations is greater than one, terminal device 220 transmits CSI feedback over a second uplink resource, where either the first or second uplink resource is either a PUSCH resource or a PUCCH resource.

[0437] In some embodiments, the at least one configuration of the CSI feedback indicates at least one of a first uplink resource or a second uplink resource.

[0438] In some embodiments, terminal device 220 transmits a first portion of the parameters on a channel of a first type.

[0439] In some embodiments, terminal device 220 transmits a second portion of the parameters on a second type of channel.

[0440] 6 illustrates a flowchart of an example method 600 according to some embodiments of the present disclosure. For example, the method 600 may be implemented in the network device 210, as shown in FIG. 2A.

[0441] In block 610, network device 210 transmits at least one configuration for CSI feedback to terminal device 220.

[0442] At block 620, network device 210 receives CSI feedback from terminal device 220 based on the at least one configuration, the CSI feedback including multiple partitions with different omission priorities, the multiple partitions including parameters associated with one or more CSI-RS allocations of the multiple CSI-RS allocations.

[0443] 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 compared to the second partition. The first partition indicates at least one of: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0444] In some embodiments, the plurality of partitions include at least a first partition and a second partition, and the 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: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group that includes the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0445] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition including a plurality of information groups, wherein a first information group of the plurality of information groups is configured to have a higher skip priority compared to other information groups of the plurality of information groups, and the first partition indicates at least one of: a first index of a first CSI-RS allocation of the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication of the number of the plurality of CSI-RS allocations.

[0446] In some embodiments, the first information group of the second partition indicates the strongest coefficient for the layer corresponding to the first CSI-RS allocation.

[0447] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates respective strongest coefficients for layers corresponding to multiple CSI-RS allocations.

[0448] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD base corresponding to the first CSI-RS allocation.

[0449] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD rotation factor corresponding to the first CSI-RS allocation.

[0450] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates a fifth number of non-zero coefficients corresponding to a plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0451] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0452] In some embodiments, another information group of the plurality of information groups indicates non-zero coefficient information, and the non-zero coefficient information indicates at least one of a bitmap indicating a non-zero coefficient and a non-zero coefficient associated with one of the plurality of CSI-RS allocations, a first CSI-RS allocation among the plurality of CSI-RS allocations, the plurality of CSI-RS allocations excluding the first CSI-RS allocation, a first CSI-RS allocation group including the first CSI-RS allocation, or a second CSI-RS allocation group different from the first CSI-RS allocation group, an amplitude coefficient corresponding to the non-zero coefficient, and a phase coefficient corresponding to the non-zero coefficient.

[0453] 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 omission priority compared to 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.

[0454] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0455] In some embodiments, the CSI feedback includes a plurality of CSI reports, each CSI report of the plurality of CSI reports corresponding to a respective CSI-RS allocation of the plurality of CSI-RS allocations.

[0456] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0457] In some embodiments, if a CSI report of the plurality of CSI reports corresponds to a first CSI-RS allocation of the plurality of CSI-RS allocations, the CSI report indicates at least one of an RI, a CQI, and a number of the plurality of CSI-RS allocations.

[0458] In some embodiments, if the number of the plurality of CSI-RS allocations is equal to one, the network device 210 receives CSI feedback via the first uplink resource.

[0459] In some embodiments, if the number of the multiple CSI-RS allocations is greater than one, the network device 210 receives the CSI feedback over a second uplink resource, where either the first or second uplink resource is either a physical uplink shared channel (PUSCH) resource or a physical uplink control channel (PUCCH) resource.

[0460] In some embodiments, the at least one configuration of the CSI feedback indicates at least one of a first uplink resource or a second uplink resource.

[0461] In some embodiments, the network device 210 receives a first portion of the parameters over a channel of a first type and a second portion of the parameters over a channel of a second type.

[0462] Device and Apparatus Embodiments 7 is a simplified block diagram of an apparatus 700 suitable for implementing embodiments of the present invention. The apparatus 700 can be considered as a further exemplary implementation of the terminal device 220 or the network device 210, as shown in FIG. 2. Thus, the apparatus 700 may be implemented as at least a portion of the terminal device 220 or the network device 210.

[0463] As shown, the device 700 includes a processor 710, a memory 720 connected to the processor 710, a suitable transmitter (TX) / receiver (RX) 740 connected to the processor 710, and a communication interface connected to the TX / RX 740. The memory 720 stores at least a portion of a program 730. The TX / RX 740 is for bidirectional communication. The TX / RX 740 has at least one antenna to facilitate communication, although in practice, the access nodes referred to in this application 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.

[0464] It is envisioned that the program 730 includes program instructions that, when executed by an associated processor 710, cause the device 700 to operate in accordance with embodiments of the present invention, as described herein with reference to Figures 2-6. The embodiments herein may be implemented by computer software executable by the processor 710 of the device 700, or by hardware, or by a combination of software and hardware. The processor 710 may be configured to implement various embodiments of the present disclosure. Furthermore, the combination of the processor 710 and the memory 720 may form a processing means 770 adapted to implement various embodiments of the present disclosure.

[0465] Memory 720 may be of any type suitable for a local technology network and may be implemented using any suitable data storage technology, including, but not limited to, 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 720 is shown in device 700, multiple physically distinct memory modules may be present in device 700. Processor 710 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 700 may also include multiple processors, such as application-specific integrated circuit chips, synchronously slaved to a clock that synchronizes the main processor.

[0466] In some embodiments, terminal device 220 comprises circuitry configured to receive at least one configuration of 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, the multiple partitions including parameters associated with one or more CSI-RS allocations of the multiple CSI-RS allocations.

[0467] In some embodiments, the circuitry is further configured to determine priorities including at least one of a respective first priority for a CSI-RS allocation among the plurality of CSI-RS allocations or a respective second priority for a parameter among the plurality of parameters included in the CSI feedback. Terminal device 220 generates the CSI feedback based on the priorities. In other words, terminal device 220 generates the CSI feedback by including the parameters in the plurality of partitions of the CSI feedback based on the priorities.

[0468] In some embodiments, the circuitry is further configured to determine the priority based on an index of the CSI-RS resource.

[0469] Alternatively or additionally, in some embodiments the circuitry is further configured to determine the priority based on an index of the CSI-RS resource group.

[0470] Alternatively or additionally, in some embodiments the circuitry is further configured to determine the priority based on an index of the CSI-RS port group.

[0471] Alternatively or additionally, in some embodiments, the circuitry is further configured to determine the priority based on the SD-based index.

[0472] In some embodiments, different factors are assigned different contributions when determining the priority.

[0473] In some embodiments, the circuitry is further configured to prioritize a parameter associated with a first CSI-RS allocation of the plurality of CSI-RS allocations.

[0474] Alternatively or additionally, in some embodiments, the circuitry is further configured to prioritize parameters associated with the first CSI-RS allocation group that includes the first CSI-RS allocation.

[0475] Alternatively or additionally, in some embodiments, the circuitry is further configured to prioritize parameters associated with the first CSI-RS port group corresponding to the first CSI-RS allocation.

[0476] Alternatively or additionally, in some embodiments, the circuitry is further configured to prioritize parameters associated with the second CSI-RS port group corresponding to the first CSI-RS Allocation group.

[0477] In some embodiments, the first CSI-RS allocation corresponds to a primary TRP.

[0478] Alternatively or additionally, in some embodiments, the first CSI-RS allocation corresponds to a TRP having an index value of 0.

[0479] Alternatively or additionally, in some embodiments, the first CSI-RS allocation corresponds to the TRP with the strongest amplitude coefficient.

[0480] Alternatively or additionally, in some embodiments, the first CSI-RS allocation corresponds to the TRP with the highest power.

[0481] 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 compared to the second partition. The first partition indicates at least one of: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0482] In some embodiments, the plurality of partitions include at least a first partition and a second partition, and the 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: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group that includes the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0483] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition including a plurality of information groups, wherein a first information group of the plurality of information groups is configured to have a higher skip priority compared to other information groups of the plurality of information groups, and the first information group of the second partition indicates at least one of: a first index of a first CSI-RS allocation of the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication of the number of the plurality of CSI-RS allocations.

[0484] In some embodiments, the first information group of the second partition indicates the strongest coefficient for the layer corresponding to the first CSI-RS allocation.

[0485] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates respective strongest coefficients for layers corresponding to multiple CSI-RS allocations.

[0486] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD base corresponding to the first CSI-RS allocation.

[0487] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD rotation factor corresponding to the first CSI-RS allocation.

[0488] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates a fifth number of non-zero coefficients corresponding to a plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0489] In some embodiments, another information group of the plurality of information groups indicates at least one resonance width factor associated with the plurality of CSI-RS allocations that include or exclude the first CSI-RS allocation.

[0490] Alternatively or additionally, in some embodiments, another information group of the plurality of information groups indicates at least one co-phase factor associated with the plurality of CSI-RS allocations that include or exclude the first CSI-RS allocation.

[0491] Alternatively or additionally, in some embodiments, other information groups of the plurality of information groups indicate respective strongest coefficients for layers corresponding to the plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0492] Alternatively or additionally, in some embodiments, other information groups of the plurality of information groups indicate at least one spatial domain (SD) base corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0493] Alternatively or additionally, in some embodiments, another information group of the plurality of information groups indicates at least one SD rotation factor corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0494] In some embodiments, another information group of the plurality of information groups indicates non-zero coefficient information, and the non-zero coefficient information indicates at least one of a bitmap indicating a non-zero coefficient and a non-zero coefficient associated with one of the plurality of CSI-RS allocations, a first CSI-RS allocation among the plurality of CSI-RS allocations, the plurality of CSI-RS allocations excluding the first CSI-RS allocation, a first CSI-RS allocation group including the first CSI-RS allocation, or a second CSI-RS allocation group different from the first CSI-RS allocation group, an amplitude coefficient corresponding to the non-zero coefficient, and a phase coefficient corresponding to the non-zero coefficient.

[0495] 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 omission priority compared to 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.

[0496] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0497] In some embodiments, the CSI feedback includes a plurality of CSI reports, each CSI report of the plurality of CSI reports corresponding to a respective CSI-RS allocation of the plurality of CSI-RS allocations.

[0498] In some embodiments, the circuitry is further configured to determine a third priority for each CSI report based on an index of a CSI-RS allocation corresponding to each CSI report of the at least one CSI report.

[0499] Alternatively or additionally, in some embodiments, the circuitry is further configured to determine a third priority for each CSI report based on a CSI report type of each of the at least one CSI report.

[0500] In some embodiments, the type of each CSI report is one of a CSI report for a CJT, a CSI report for a single-TRP transmission assumption, a CSI report for a multi-TRP transmission assumption, or an NCJT.

[0501] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0502] In some embodiments, if a CSI report of the plurality of CSI reports corresponds to a first CSI-RS allocation of the plurality of CSI-RS allocations, the CSI report indicates at least one of an RI, a CQI, and a number of the plurality of CSI-RS allocations.

[0503] In some embodiments, if the number of CSI-RS allocations is equal to one, terminal device 220 transmits CSI feedback over the first uplink resource.

[0504] In some embodiments, if the number of CSI-RS allocations is greater than one, terminal device 220 transmits CSI feedback over a second uplink resource, where either the first or second uplink resource is either a PUSCH resource or a PUCCH resource.

[0505] In some embodiments, the at least one configuration of the CSI feedback indicates at least one of a first uplink resource or a second uplink resource.

[0506] In some embodiments, the circuitry is further configured to transmit a first portion of the parameters on a channel of the first type.

[0507] In some embodiments, the circuitry is further configured to transmit a second portion of the parameters on a channel of the second type.

[0508] In some embodiments, network device 210 comprises circuitry configured to transmit at least one configuration for CSI feedback to terminal device 220 and circuitry configured to receive CSI feedback from terminal device 220 based on the at least one configuration, wherein the CSI feedback includes multiple partitions having different omission priorities, the multiple partitions including parameters associated with one or more CSI-RS allocations of the multiple CSI-RS allocations.

[0509] 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 compared to the second partition. The first partition indicates at least one of: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0510] In some embodiments, the plurality of partitions include at least a first partition and a second partition, and the 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: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group that includes the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0511] In some embodiments, the plurality of partitions include at least a first partition and a second partition, the second partition including a plurality of information groups, wherein a first information group of the plurality of information groups is configured to have a higher skip priority compared to other information groups of the plurality of information groups, and the first partition indicates at least one of: a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of each of a plurality of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication of the number of the plurality of CSI-RS allocations.

[0512] In some embodiments, the first information group of the second partition indicates the strongest coefficient for the layer corresponding to the first CSI-RS allocation.

[0513] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates respective strongest coefficients for layers corresponding to multiple CSI-RS allocations.

[0514] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD base corresponding to the first CSI-RS allocation.

[0515] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates at least one SD rotation factor corresponding to the first CSI-RS allocation.

[0516] Alternatively or additionally, in some embodiments, the first information group of the second partition indicates a fifth number of non-zero coefficients corresponding to a plurality of CSI-RS allocations excluding the first CSI-RS allocation.

[0517] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0518] In some embodiments, another information group of the plurality of information groups indicates non-zero coefficient information, and the non-zero coefficient information indicates at least one of a bitmap indicating a non-zero coefficient and a non-zero coefficient associated with one of the plurality of CSI-RS allocations, a first CSI-RS allocation among the plurality of CSI-RS allocations, the plurality of CSI-RS allocations excluding the first CSI-RS allocation, a first CSI-RS allocation group including the first CSI-RS allocation, or a second CSI-RS allocation group different from the first CSI-RS allocation group, an amplitude coefficient corresponding to the non-zero coefficient, and a phase coefficient corresponding to the non-zero coefficient.

[0519] 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 omission priority compared to 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.

[0520] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0521] In some embodiments, the CSI feedback includes a plurality of CSI reports, each CSI report of the plurality of CSI reports corresponding to a respective CSI-RS allocation of the plurality of CSI-RS allocations.

[0522] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0523] In some embodiments, if a CSI report of the plurality of CSI reports corresponds to a first CSI-RS allocation of the plurality of CSI-RS allocations, the CSI report indicates at least one of an RI, a CQI, and a number of the plurality of CSI-RS allocations.

[0524] In some embodiments, if the number of the plurality of CSI-RS allocations is equal to one, the network device 210 receives CSI feedback via the first uplink resource.

[0525] In some embodiments, if the number of the multiple CSI-RS allocations is greater than one, the network device 210 receives the CSI feedback over a second uplink resource, where either the first or second uplink resource is either a physical uplink shared channel (PUSCH) resource or a physical uplink control channel (PUCCH) resource.

[0526] In some embodiments, the at least one configuration of the CSI feedback indicates at least one of a first uplink resource or a second uplink resource.

[0527] In some embodiments, the circuitry is further configured to receive a first portion of the parameters over a channel of the first type and a second portion of the parameters over a channel of the second type.

[0528] The term "circuitry" as used herein 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 a further example, a circuit may be any portion of a hardware processor with software, including a digital signal processor, software, and memory, that work together to cause a device, such as a terminal device or network device, to perform various functions. In 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 to operate, but the software may not be present if not necessary for operation. The term circuitry as used herein also covers implementations of only a hardware circuit or processor, or a portion of a hardware circuit or processor with associated software and / or firmware.

[0529] In summary, the embodiments of the present disclosure provide the following solutions:

[0530] In one solution, a method of communication includes: receiving, in a terminal device, 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, wherein the CSI feedback includes a plurality of partitions having different omission priorities, and the plurality of partitions include parameters associated with one or more CSI-RS allocations of a plurality of CSI-RS allocations.

[0531] In some embodiments, the method further includes determining priorities including at least one of a respective first priority for a CSI-RS allocation among the plurality of CSI-RS allocations and a respective second priority for a parameter among the parameters included in the CSI feedback, and generating the CSI feedback based on the priorities.

[0532] In some embodiments, transmitting the CSI feedback includes determining priorities including at least one of a respective first priority for a CSI-RS allocation among the plurality of CSI-RS allocations or a respective second priority for a parameter among the parameters included in the CSI feedback, and generating the CSI feedback by including the parameters in a plurality of partitions of the CSI feedback based on the priorities.

[0533] In some embodiments, determining the priority includes determining the priority based on factors including at least one of a CSI-RS resource index, a CSI-RS resource group index, a CSI-RS port group index, or an SD-based index.

[0534] In some embodiments, different factors are assigned different contributions when determining the priority.

[0535] In some embodiments, determining the priority includes prioritizing parameters associated with one of a first CSI-RS allocation of the plurality of CSI-RS allocations, a first CSI-RS allocation group including the first CSI-RS allocation, a first CSI-RS port group corresponding to the first CSI-RS allocation, or a second CSI-RS port group corresponding to the first CSI-RS allocation group.

[0536] In some embodiments, the first CSI-RS allocation corresponds to one of the primary TRP, the TRP with index value 0, the TRP with the strongest amplitude coefficient, or the TRP with the highest power.

[0537] 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; 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, 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: a first index of a first CSI-RS allocation of the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of a plurality of respective ones of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0538] In some embodiments, the first information group of the second partition indicates at least one of: a strongest coefficient for the layer corresponding to the first CSI-RS allocation; respective strongest coefficients for the layers corresponding to the multiple CSI-RS allocations; at least one SD base corresponding to the first CSI-RS allocation; at least one SD rotation factor corresponding to the first CSI-RS allocation; or a fifth number of non-zero coefficients corresponding to the multiple CSI-RS allocations excluding the first CSI-RS allocation.

[0539] In some embodiments, another information group of the plurality of information groups indicates at least one of at least one resonance width coefficient associated with the plurality of CSI-RS allocations from which the first CSI-RS allocation is included or excluded, at least one co-phase coefficient associated with the plurality of CSI-RS allocations from which the first CSI-RS allocation is included or excluded, a respective strongest coefficient for a layer corresponding to the plurality of CSI-RS allocations from which the first CSI-RS allocation is excluded, at least one SD base corresponding to each CSI-RS allocation from the plurality of CSI-RS allocations from which the first CSI-RS allocation is excluded, or at least one SD rotation factor corresponding to each CSI-RS allocation from the plurality of CSI-RS allocations from which the first CSI-RS allocation is excluded.

[0540] In some embodiments, other information groups of the plurality of information groups indicate non-zero coefficient information, and the non-zero coefficient information indicates at least one of a bitmap indicating non-zero coefficients associated with one of the plurality of CSI-RS allocations, a first CSI-RS allocation among the plurality of CSI-RS allocations, a plurality of CSI-RS allocations excluding the first CSI-RS allocation, a first CSI-RS allocation group including the first CSI-RS allocation, or a second CSI-RS allocation group different from the first CSI-RS allocation group; amplitude coefficients corresponding to the non-zero coefficients; and phase coefficients corresponding to the non-zero coefficients.

[0541] 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 omission 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.

[0542] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0543] In some embodiments, the CSI feedback includes a plurality of CSI reports, each CSI report of the plurality of CSI reports corresponding to a respective CSI-RS allocation of the plurality of CSI-RS allocations.

[0544] In some embodiments, further including determining a third priority for each CSI report based on at least one of an index of a CSI-RS allocation corresponding to each CSI report of the at least one CSI report and a type of each CSI report.

[0545] In some embodiments, the type of each CSI report is one of a CSI report for a CJT, a CSI report for a single-TRP transmission assumption, a CSI report for a multi-TRP transmission assumption, and a CSI report for an NCJT.

[0546] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0547] In some embodiments, if a CSI report of the plurality of CSI reports corresponds to a first CSI-RS allocation of the plurality of CSI-RS allocations, the CSI report indicates at least one of an RI, a CQI, and a number of the plurality of CSI-RS allocations.

[0548] In some embodiments, transmitting the CSI feedback to the network device includes transmitting the CSI feedback via a first uplink resource if the number of the plurality of CSI-RS allocations is equal to one, and transmitting the CSI feedback via a second uplink resource if the number of the plurality of CSI-RS allocations is greater than one, wherein any one of the first uplink resource and the second uplink resource is one of a PUSCH resource or a PUCCH resource.

[0549] In some embodiments, the at least one configuration for CSI feedback indicates at least one of a first uplink resource or a second uplink resource.

[0550] 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.

[0551] In one solution, a method of communication includes, in a terminal device, transmitting at least one configuration for CSI feedback via a network 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 one or more CSI-RS allocations of a plurality of CSI-RS allocations.

[0552] 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; 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, 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: a first index of a first CSI-RS allocation of the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group including the first CSI-RS allocation; a third index of a plurality of respective ones of the plurality of CSI-RS allocations; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of non-zero coefficients corresponding to the plurality of CSI-RS allocations; and a fourth number indication indicating the number of the plurality of CSI-RS allocations.

[0553] In some embodiments, the first information group of the second partition indicates at least one of: a strongest coefficient for the layer corresponding to the first CSI-RS allocation; respective strongest coefficients for the layers corresponding to the multiple CSI-RS allocations; at least one SD base corresponding to the first CSI-RS allocation; at least one SD rotation factor corresponding to the first CSI-RS allocation; or a fifth number of non-zero coefficients corresponding to the multiple CSI-RS allocations excluding the first CSI-RS allocation.

[0554] In some embodiments, another information group of the plurality of information groups indicates at least one of at least one resonance width coefficient associated with the plurality of CSI-RS allocations from which the first CSI-RS allocation is included or excluded, at least one co-phase coefficient associated with the plurality of CSI-RS allocations from which the first CSI-RS allocation is included or excluded, a respective strongest coefficient for a layer corresponding to the plurality of CSI-RS allocations from which the first CSI-RS allocation is excluded, at least one SD base corresponding to each CSI-RS allocation from the plurality of CSI-RS allocations from which the first CSI-RS allocation is excluded, or at least one SD rotation factor corresponding to each CSI-RS allocation from the plurality of CSI-RS allocations from which the first CSI-RS allocation is excluded.

[0555] 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 non-zero coefficients associated with one of the plurality of CSI-RS allocations, a first allocation of the plurality of CSI-RS allocations, a plurality of CSI-RS allocations from which the first CSI-RS allocation has been excluded, a first CSI-RS allocation group including the first CSI-RS allocation, or a second CSI-RS allocation group from which the first CSI-RS allocation has been excluded, amplitude coefficients corresponding to the non-zero coefficients, and phase coefficients corresponding to the non-zero coefficients.

[0556] 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 omission 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.

[0557] In some embodiments, the number of information groups in the plurality of information groups is greater than or equal to three.

[0558] In some embodiments, the CSI feedback includes a plurality of CSI reports, each CSI report of the plurality of CSI reports corresponding to a respective CSI-RS allocation of the plurality of CSI-RS allocations.

[0559] In some embodiments, each CSI report indicates at least one of: at least one SD base corresponding to the respective allocation; at least one SD rotation factor corresponding to the respective CSI-RS allocation; at least one amplitude coefficient corresponding to the respective CSI-RS allocation; at least one phase coefficient corresponding to the respective CSI-RS allocation; at least one resonance width coefficient corresponding to the respective CSI-RS allocation; at least one co-phase coefficient corresponding to the respective CSI-RS allocation; the number of non-zero coefficients corresponding to the respective CSI-RS allocation; a bitmap of the non-zero coefficients; or the strongest coefficient for the layer corresponding to the respective allocation.

[0560] In some embodiments, if a CSI report of the plurality of CSI reports corresponds to a first CSI-RS allocation of the plurality of CSI-RS allocations, the CSI report indicates at least one of an RI, a CQI, and a number of the plurality of CSI-RS allocations.

[0561] In some embodiments, receiving the CSI feedback from the terminal device includes receiving the CSI feedback via a first uplink resource if the number of the plurality of CSI-RS allocations is equal to one, and receiving the CSI feedback via a second uplink resource if the number of the plurality of CSI-RS allocations is greater than one, wherein one of the first uplink resource and the second uplink resource is one of a PUSCH resource or a PUCCH resource.

[0562] In some embodiments, the at least one configuration for CSI feedback indicates at least one of a first uplink resource or a second uplink resource.

[0563] In some embodiments, receiving the CSI feedback from the terminal device includes receiving a first portion of the parameters over a channel of a first type and receiving a second portion of the parameters over a channel of a second type.

[0564] In another solution, a communications device comprises a processor configured to cause the device to perform any of the above methods.

[0565] 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 executed by a controller, microprocessor, or other computing device. While various aspects of the embodiments of the present disclosure are illustrated and described using block diagrams, flowcharts, or other graphical representations, it should be understood that the blocks, apparatus, systems, techniques, or methods described herein can 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 combinations thereof.

[0566] 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, such as those included in program modules, that execute on a target real or virtual processor in a device to perform the processes or methods described above with reference to Figures 2 through 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 between program modules as desired in various embodiments. The machine-executable instructions of the program modules may be executed in local or distributed devices. In a distributed device, program modules may be located in both local and remote storage media.

[0567] Program code for carrying out the methods of the present disclosure may be written in any combination of one or more programming languages. Such program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, and when executed by the processor or controller, implements the functions / operations specified in the flowcharts and / or block diagrams. The program code may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0568] The above program code may be embodied in a machine-readable medium. The machine-readable medium may be any tangible medium that can contain or store a program used 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. Machine-readable media include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, devices, or suitable combinations thereof. More specific examples of machine-readable storage media include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0569] Furthermore, while operations are shown in a particular order, it should not be understood that such operations need to be performed in a particular order, sequentially, or that all of the operations shown need to be performed to achieve desirable results. Multitasking and parallel processing may be advantageous in certain situations. Similarly, while the above description includes some specific implementation details, these should not be construed as limiting the scope of the disclosure, but rather as a description of functionality 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.

[0570] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure, as defined by the appended claims, is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts 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 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 one or more CSI-Reference Signal (RS) allocations among a plurality of CSI-RS allocations; Methods of communication, including:

2. determining priorities including at least one of: a first priority for each CSI-RS allocation among the plurality of CSI-RS allocations; and a second priority for each parameter among the parameters included in the CSI feedback; generating the CSI feedback based on the priority; and further comprising: The method of claim 1.

3. determining the priority CSI-RS resource index; CSI-RS resource group index; the index of the CSI-RS port group, and Spatial Domain (SD) based indexes, determining the priority based on factors including at least one of: The method of claim 2.

4. different factors are assigned different contributions in determining the priority; The method of claim 2.

5. determining the priority a first CSI-RS allocation among the plurality of CSI-RS allocations; a first CSI-RS allocation group including the first CSI-RS allocation; a first CSI-RS port group corresponding to the first CSI-RS allocation; or a second CSI-RS port group corresponding to the first CSI-RS allocation group; prioritizing parameters related to one of the The method of claim 2.

6. The first CSI-RS allocation Primary Transmission / Reception Point (TRP), A TRP with index value 0, The TRP with the strongest amplitude coefficient, or TRP with maximum power, corresponds to one of The method of claim 5.

7. 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 omission priority than other information groups among the plurality of information groups; One of the first partition and the first information group of the second partition is a first index of a first CSI-RS allocation among the plurality of CSI-RS allocations; a second index of a first CSI-RS resource group that includes the first CSI-RS allocation; a plurality of respective third indices of the plurality of CSI-RS assignments; a first number of non-zero coefficients corresponding to the first CSI-RS allocation; a second number of the non-zero coefficients corresponding to the first CSI-RS group assignment; a third number of the non-zero coefficients corresponding to the plurality of CSI-RS assignments; and a fourth number indication indicating a number of the plurality of CSI-RS allocations; The method of claim 1.

8. The first information group of the second partition is a strongest coefficient for a layer corresponding to the first CSI-RS allocation; a respective strongest coefficient for a layer corresponding to the plurality of CSI-RS allocations; at least one spatial domain (SD) based CSI-RS assignment corresponding to the first CSI-RS assignment; at least one SD rotation factor corresponding to the first CSI-RS allocation; and a fifth number of the non-zero coefficients corresponding to the plurality of CSI-RS allocations excluding the first CSI-RS allocation; Indicating at least one of The method of claim 7.

9. The other information group among the plurality of information groups is at least one resonance width factor associated with the plurality of CSI-RS allocations, including or excluding the first CSI-RS allocation; at least one co-phase factor associated with the plurality of CSI-RS allocations, including or excluding the first CSI-RS allocation; respective strongest coefficients for layers corresponding to the plurality of CSI-RS allocations excluding the first CSI-RS allocation; at least one spatial domain (SD) base corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations excluding the first CSI-RS allocation; and at least one SD rotation factor corresponding to each CSI-RS allocation of the plurality of CSI-RS allocations excluding the first CSI-RS allocation; Indicating at least one of The method of claim 7.

10. The other information group of the plurality of information groups indicates non-zero coefficient information, and the non-zero coefficient information is the plurality of CSI-RS allocations; a first CSI-RS allocation among the plurality of CSI-RS allocations; the plurality of CSI-RS allocations excluding the first CSI-RS allocation; a first CSI-RS allocation group including the first CSI-RS allocation; or a second CSI-RS allocation group different from the first CSI-RS allocation group; a bitmap indicating the non-zero coefficients associated with one of an amplitude coefficient corresponding to the non-zero coefficient; a phase coefficient corresponding to the non-zero coefficient; Indicating at least one of The method of claim 7.

11. the other information groups among the plurality of information groups include a second information group and a third information group having an omission priority lower than that of 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 third group of information indicates second non-zero coefficient information corresponding to a non-zero coefficient having a lower priority. The method of claim 10.

12. The number of information groups in the plurality of information groups is greater than or equal to 3; The method of claim 7.

13. the CSI feedback includes a plurality of CSI reports, each CSI report of the plurality of CSI reports corresponding to a respective CSI-RS allocation among the plurality of CSI-RS allocations. The method of claim 1.

14. an index of a CSI-RS allocation corresponding to each CSI report of the at least one CSI report; and a type of each CSI report; determining a third priority for each CSI report based on at least one of: The method of claim 13.

15. The type of each CSI report is: CSI reporting for coherent joint transmission (CJT); CSI reporting for single transmitting / receiving point (TRP) transmission assumptions; CSI reporting for multi-TRP transmission assumptions, or CSI reporting for non-coherent joint transmission (NCJT), 15. The method of claim 14.

16. Each CSI report: at least one spatial domain (SD) base corresponding to each of said allocations; at least one SD rotation factor corresponding to each CSI-RS allocation; at least one amplitude coefficient corresponding to each CSI-RS allocation; at least one phase factor corresponding to each CSI-RS allocation; at least one resonance width coefficient corresponding to each CSI-RS allocation; at least one co-phase coefficient corresponding to each CSI-RS allocation; the number of non-zero coefficients corresponding to each CSI-RS allocation; a bitmap of the non-zero coefficients; and the strongest coefficient for the layer corresponding to the respective allocation; The method of claim 13.

17. If a CSI report among the plurality of CSI reports corresponds to a first CSI-RS allocation among the plurality of CSI-RS allocations, the CSI report: Rank Indicator (RI), a Channel Quality Indicator (CQI), and a number of the plurality of CSI-RS allocations; The method of claim 13.

18. transmitting the CSI feedback to the network device, If the number of the plurality of CSI-RS allocations is equal to 1, transmitting the CSI feedback via a first uplink resource; If the number of the plurality of CSI-RS allocations is greater than one, transmitting the CSI feedback via a second uplink resource; Including, any one of the first uplink resource and the second uplink resource is one of a physical uplink shared channel (PUSCH) resource or a physical uplink control channel (PUCCH) resource; The method of claim 1.

19. the at least one configuration for CSI feedback indicates at least one of the first uplink resource and the second uplink resource.

20. The method of claim 18.

20. transmitting the CSI feedback to the network device, transmitting a first portion of the parameters on a channel of a first type; transmitting a second portion of the parameters on a channel of a second type; Including, The method of claim 1.

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