Channel state information reporting

Abstract

Apparatuses, methods, and systems are disclosed for channel state information reporting. One method (900) includes receiving (902) channel state information reporting configuration information. The channel state information reporting configuration information includes: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points. Each point of the multiple points is associated with a non-zero-power channel state information reference signal resource. The method (900) includes performing (904) channel measurement using the channel state information reference signal resource sets. The method (900) includes generating (906) a set of channel state information reports based on the channel state information reporting configuration information.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority to U.S. Patent Application Serial No. 63 / 015,359, entitled “APPARATUSES, METHODS, AND SYSTEMS FOR CSI REPORTING ENHANCEMENTS FOR MULTI-TRP / PANEL TRANSMISSION” and filed on April 24, 2020, by Ahmed Hindy, U.S. Patent Application Serial No. 63 / 015,366, entitled “APPARATUSES, METHODS, AND SYSTEMS FOR CSI REPORTING ENHANCEMENTS FOR MULTI-TRP / PANEL TRANSMISSION: HYPOTHESIS REDUCTION” and filed on April 24, 2020, by Ahmed Hindy, and U.S. Patent Application Serial No. 63 / 015,372, entitled “APPARATUSES, METHODS, AND SYSTEMS FOR CSI REPORTING ENHANCEMENTS FOR MULTI-TRP / PANEL TRANSMISSION” and filed on April 24, 2020, by Khalid Zeineddine, all of which are incorporated by reference herein in their entirety. TECHNICAL FIELD

[0003] The subject matter disclosed herein relates generally to wireless communication, and more particularly to channel state information reporting. BACKGROUND

[0004] In certain wireless communication networks, one or more channel state information reports can be made. In multi-TRP and / or multi-panel networks, channel state information reporting can be inefficiently transmitted. SUMMARY

[0005] Methods for channel state information reporting are disclosed. Apparatuses and systems also perform the functions of these methods. One embodiment of a method includes receiving channel state information reporting configuration information. The channel state information reporting configuration information includes: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points. Each of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource sets for channel measurement, and at least one of the multiple points is associated with one or more channel state information interference management resources for zero-power interference measurement. In some embodiments, the method includes performing channel measurement using the channel state information reference signal resource sets. In various embodiments, the method includes generating a set of channel state information reports based on the channel state information reporting configuration information.

[0006] An apparatus for channel state information reporting includes a receiver configured to receive channel state information reporting configuration information, where the channel state information reporting configuration information includes: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points, where each of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource sets for channel measurement, and at least one of the multiple points is associated with one or more channel state information interference management resources for zero-power interference measurement. In various embodiments, the apparatus includes a processor configured to: perform channel measurement using the channel state information reference signal resource sets; and generate a set of channel state information reports based on the channel state information reporting configuration information, where each of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point, and where the information indicating use of channel state information feedback for the multiple points includes: a radio resource control parameter within the channel state information reporting configuration; a number of channel state information reports within the channel state information reporting configuration; a quasi-co-location relationship involving one or more channel state information reference signal resources within the one or more channel state information reference signal resource sets; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration including at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across the multiple points; or some combination thereof.

[0007] Another embodiment of a method for channel state information reporting includes receiving channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information channel state information reference signal resource configurations associated with a set of channel state information channel state information reference signal resources for channel measurement and a set of channel state information interference management resources for interference measurement; and information indicating use of channel state information feedback corresponding to multiple points, where each of the multiple points is associated with a non-zero-power channel state information reference signal resource of the set of channel state information channel state information reference signal resources for channel measurement and the multiple points are associated with one or more channel state information interference management resources of the set of channel state information interference management resources for interference measurement. In some embodiments, the method includes generating a set of channel state information reports based on the channel state information report configuration information, where each channel state information report in the set of channel state information reports includes two parts. In various embodiments, the method includes reporting the set of channel state information reports to a network.

[0008] Another apparatus for channel state information reporting includes a receiver configured to receive channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information channel state information reference signal resource configurations associated with a set of channel state information channel state information reference signal resources for channel measurement and a set of channel state information interference management resources for interference measurement; and information indicating use of channel state information feedback corresponding to multiple points, where each of the multiple points is associated with a non-zero-power channel state information reference signal resource of the set of channel state information channel state information reference signal resources for channel measurement, the multiple points are associated with one or more channel state information interference management resources of the set of channel state information interference management resources for interference measurement, and each of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point. In various embodiments, the apparatus includes a processor configured to: generate a set of channel state information reports based on the channel state information report configuration information, where each channel state information report in the set of channel state information reports includes two parts; and report the set of channel state information reports to a network.

[0009] Yet another embodiment for a method of channel state information reporting includes receiving channel state information reporting configuration information, where the channel state information reporting configuration information includes: information indicating one or more channel state information-reference signal resource configurations associated with at least one non-zero-power channel state information reference signal resource set for channel measurement; and information indicating use of channel state information reporting configuration corresponding to a plurality of points, where the plurality of points are associated with a primary group of points or a secondary group of points. In some embodiments, the method includes performing channel measurement using the at least one non-zero-power channel state information reference signal resource set. In various embodiments, the method includes generating a set of channel state information reports based on the channel state information reporting configuration information.

[0010] Yet another apparatus for channel state information reporting includes a receiver configured to receive channel state information reporting configuration information, where the channel state information reporting configuration information includes: information indicating one or more channel state information-reference signal resource configurations associated with at least one non-zero-power channel state information reference signal resource set for channel measurement; and information indicating use of channel state information reporting configuration corresponding to a plurality of points, where the plurality of points are associated with a primary group of points or a secondary group of points. In various embodiments, the apparatus includes a processor configured to: perform channel measurement using the at least one non-zero-power channel state information reference signal resource set; and generate a set of channel state information reports based on the channel state information reporting configuration information. BRIEF DESCRIPTION OF DRAWINGS

[0011] A more particular description of the embodiments briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only some embodiments and are not therefore to be considered to be limiting of the scope of the embodiments, the embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

[0012] Figure 1 is a schematic block diagram illustrating one embodiment of a wireless communication system for channel state information reporting;

[0013] Figure 2 is a schematic block diagram illustrating one embodiment of an apparatus that can be used for channel state information reporting;

[0014] Figure 3 is a schematic block diagram illustrating one embodiment of an apparatus that can be used for channel state information reporting;

[0015] Figure 4 is a diagram illustrating one embodiment of an aperiodic trigger state defining a list of CSI reporting settings;

[0016] Figure 5is a code sample illustrating one embodiment of a procedure by which a set of aperiodic trigger state indication resources and QCL information are indicated;

[0017] Figure 6 is a code sample illustrating one embodiment of an RRC configuration including NZP-CSI-RS resources and CSI-IM-resources;

[0018] Figure 7 is a schematic block diagram illustrating one embodiment of partial CSI omission for PUSCH-based CSI;

[0019] Figure 8 is a schematic block diagram illustrating one embodiment of joint transmission of data by two TRPs to one user equipment using a single codeword;

[0020] Figure 9 is a flowchart illustrating one embodiment of a method for channel state information reporting;

[0021] Figure 10 is a flowchart illustrating another embodiment of a method for channel state information reporting; and

[0022] Figure 11 is a flowchart illustrating yet another embodiment of a method for channel state information reporting. DETAILED DESCRIPTION

[0023] As those skilled in the art will appreciate, the aspects of the embodiments can be embodied as a system, device, method or program product. Accordingly, the embodiments can take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that can all generally be referred to herein as a "circuit," "module" or "system." Furthermore, the embodiments can take the form of a program product embodied in one or more computer readable storage devices having stored thereon computer readable code (i.e., program code) that can be used to program a computer (e.g., a processor) to perform a process. The program code can be executed by one or more processors to cause the processors to perform any aspect of the embodiments. The program code can be stored in the memory of the computer (e.g., RAM, ROM, etc.) at any time.

[0024] Certain of the functional units described in this specification can be labeled as modules, in order to more particularly emphasize their implementation independence. For example, a module can be implemented as a hardware circuit comprising custom very-large-scale integration ("VLSI") circuits or gate arrays

[0025] Modules can also be implemented in code and / or software for execution by various types of processors. An identified module of code may, for instance, include one or more physical or logical blocks of executable code which may, for instance, be organized as an object, procedure or function. Nevertheless, the executables of an identified module need not be physically located together, but can include disparate instructions stored in different locations which, when joined logically together, include the module and achieve the stated purpose for the module.

[0026] Indeed, a module of code can be a single instruction, or many instructions, and can even be distributed over several different code segments, among different programs, and across several memory devices. Similarly, operational data can be identified and illustrated herein within modules, and can be embodied in any suitable form and organized within any suitable type of data structure. The operational data can be collected as a single data set, or can be distributed over different locations including over different computer readable storage devices. Where a module or portions of a module are implemented in software, the software portion is stored in one or more computer readable storage devices.

[0027] Any combination of one or more computer readable medium can be utilized. The computer readable medium can be a computer readable storage medium. The computer readable storage medium can be a storage device storing the code. The storage device can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, holographic, micromechanical, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.

[0028] More specific examples (a non-exhaustive list) of the storage device would include the following: 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), a portable compact disc read-only memory ("CD-ROM"), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium can be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

[0029] Code for carrying out operations for embodiments can be any number of lines and can be written in any combination of one or more programming languages including an object- oriented programming language such as Python, Ruby, Java, Smalltalk, C++, or the like, and conventional procedural programming languages, such as the "C" programming language, or the like, and / or machine languages such as assembly languages. The code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (“LAN”) or a wide area network (“WAN”), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0030] Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment, but mean “one or more but not all embodiments.” The terms “including,” “comprising,” “having,” and variations thereof mean “including but not limited to,” unless expressly specified otherwise. The enumeration of items does not imply that any or all of the items are mutually exclusive, unless expressly specified otherwise. The terms “a,” “an,” and “the” also refer to “one or more” unless expressly specified otherwise.

[0031] Furthermore, the described features, structures, or characteristics of the embodiments can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided, such as examples of programming, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a thorough understanding of the embodiments. One skilled in the relevant art will recognize, however, that the embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring aspects of the embodiments.

[0032] The code can also be stored in a storage device that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the storage device produce an article of manufacture including instructions which implement the function / act specified in the schematic flowchart diagrams and / or schematic block diagrams block or blocks.

[0033] The code can also be stored in a storage device that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the storage device produce an article of manufacture including instructions which implement the function / act specified in the schematic flowchart diagrams and / or schematic block diagrams block or blocks.

[0034] The code can also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the code which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart diagrams and / or schematic block diagrams block or blocks.

[0035] The schematic flowchart diagrams and / or schematic block diagrams in the drawings show the architecture, functionality, and operation of possible implementations of apparatuses, systems, methods and program products according to various embodiments. In this regard, each block in the schematic flowchart diagrams and / or schematic block diagrams can represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s).

[0036] It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks can sometimes be executed in the reverse order, depending upon the functionality involved. Other steps and methods can be conceived that are equivalent in function, logic, or effect to those illustrated, with the

[0037] Although various arrow types and line types can be employed in the flowcharts and / or block diagrams, these are merely used to direct the flow of the depicted embodiments, and are not intended to limit the scope of embodiments. Indeed, some arrows or other connectors can be used to indicate certain directions of enumerated steps, while other arrows or other connectors can be used to indicate the possibility of the enactment of certain steps in a different order, or the enactment of a certain step in a different manner, depending on the circumstances. Also, each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and code.

[0038] The description of elements in each of the figures can refer to elements of the previous figures. Like numbers refer to like elements throughout the several figures, including like elements of alternative embodiments.

[0039] Figure 1 Embodiments of a wireless communication system 100 for channel state information reporting are depicted. In one embodiment, the wireless communication system 100 includes remote units 102 and network units 104. While the techniques of this disclosure are sufficiently broad to encompass the use of a variety of systems and networks, including old and new systems and networks, the example of a wireless communication system 100 is useful to illustrate some of the potential advantages of the disclosed techniques. Figure 1 While a specific number of remote units 102 and network units 104 are depicted in FIG. 1, one of skill in the art will recognize that any number of remote units 102 and network units 104 can be included in the wireless communication system 100.

[0040] In one embodiment, the remote units 102 can include computing devices, such as desktop computers, laptop computers, personal digital assistants (“PDAs”), tablet computers, smart phones, smart televisions (e.g., televisions connected to the Internet), set-top boxes, game consoles, security systems (including security cameras), vehicle

[0041] The network units 104 can be distributed over a geographic region. In certain embodiments, a network unit 104 can also be referred to as and / or include an access point, an access terminal, a base, a base station, a core network (“CN”), a radio network entity, a Node-B, an evolved Node-B (“eNB”), a 5G node-B (“gNB”), a Home Node-B, a relay node, a device, a core network, an air server, a radio access node, an access point (“AP”), New Radio (“NR”), a network entity, an access and mobility management function (“AMF”), a unified data management (“UDM”), a unified data repository (“UDR”), UDM / UDR, a policy control function (“PCF”), a radio access network (“RAN”), a network slice selection function (“NSSF”), operations, administration, and management (“OAM”), a session management function (“SMF”), a user plane function (“UPF”), an application function, an authentication server function (“AUSF”), security anchor functionality (“SEAF”), trusted non-3GPP gateway function (“TNGF”), or by any other terminology used in the art. The network units 104 are generally part of a radio access network that includes one or more controllers that are

[0042] In one implementation, the wireless communication system 100 is compliant with the NR protocols standardized in the Third Generation Partnership Project (“3GPP”), where the network units 104 transmit using an OFDM modulation scheme on the downlink (“DL”) and the remote units 102 transmit on the uplink (“UL”) using a single-carrier frequency division multiple access (“SC-FDMA”) scheme or an orthogonal frequency division multiplexing (“OFDM”) scheme. More generally, however, the wireless communication system 100 can implement some other open or proprietary communication protocol, such as WiMAX, Institute of Electrical and Electronics Engineers (“IEEE”) 802.11 variants, Global System for Mobile Communications (“GSM”), Universal Terrestrial Radio Access (“UTRA”), Long Term Evolution (“LTE”), Code Division Multiple Access (“CDMA”) 2000, Bluetooth, ZigBee, Sigfoxx, among other protocols. The present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol. ZigBee, Sigfoxx, among other protocols. The present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol.

[0043] The network units 104 can serve a number of remote units 102 within a serving area, for example, a cell or a cell sector via a wireless communication link. The network units 104 transmit DL communication signals to serve the remote units 102 in the time, frequency, and / or spatial domain.

[0044] In various embodiments, a remote unit 102 can receive channel state information report configuration information. The channel state information report configuration information includes information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof; and information using channel state information feedback corresponding to multiple points. Each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource sets for channel measurement, and at least one point of the multiple points is associated with one or more channel state information interference management resources for zero-power interference measurement. In some embodiments, the remote unit 102 can perform channel measurement using the channel state information reference signal resource sets. In various embodiments, the remote unit 102 can generate a set of channel state information reports based on the channel state information report configuration information. Thus, the remote unit 102 can be used for channel state information reporting.

[0045] In certain embodiments, a remote unit 102 can receive channel state information report configuration information, where the channel state information report configuration information includes information indicating one or more channel state information reference signal resource configurations associated with a channel state information reference signal resource set for channel measurement and a channel state information interference management resource set for interference measurement; and information indicating using channel state information feedback corresponding to multiple points, where each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource set for channel measurement, and the multiple points are associated with one or more channel state information interference management resources of the channel state information interference management resource set for interference measurement. In some embodiments, the remote unit 102 can generate a set of channel state information reports based on the channel state information report configuration information, where each channel state information report of the set of channel state information reports includes two parts. In various embodiments, the remote unit 102 can report the set of channel state information reports to a network. Thus, the remote unit 102 can be used for channel state information reporting.

[0046] In some embodiments, the remote unit 102 can receive channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information-reference signal resource configurations associated with at least one non-zero-power channel state information reference signal resource set for channel measurement; and information indicating usage of channel state information report configuration corresponding to multiple points, where the multiple points are associated with points of a primary group or points of a secondary group. In some embodiments, the remote unit 102 can perform channel measurement using the at least one non-zero-power channel state information reference signal resource set. In various embodiments, the remote unit 102 can generate a set of channel state information reports based on the channel state information report configuration information. Thus, the remote unit 102 can be used for channel state information reporting.

[0047] Figure 2 One embodiment of an apparatus 200 that can be used for channel state information reporting is depicted. The apparatus 200 includes one embodiment of the remote unit 102. Furthermore, the remote unit 102 can include a processor 202, a memory 204, an input device 206, a display 208, a transmitter 210, and a receiver 212. In some embodiments, the input device 206 and the display 208 are combined into a single device, such as a touch screen. In certain embodiments, the remote unit 102 can not include any input device 206 and / or display 208. In various embodiments, the remote unit 102 can include one or more of the processor 202, the memory 204, the transmitter 210, and the receiver 212, and can not include the input device 206 and / or the display 208.

[0048] In one embodiment, the processor 202 can include any known controller or processor capable of executing computer-readable instructions and / or capable of performing logical operations. For example, the processor 202 can be a microcontroller, a microprocessor, a central processing unit (“CPU”), a graphics processing unit (“GPU”), an auxiliary processing unit, a field programmable gate array (“FPGA”), or similar programmable controller. In some embodiments, the processor 202 executes instructions stored in the memory 204 to perform methods and routines described herein. The processor 202 is communicatively coupled to the memory 204, the input device 206, the display 208, the transmitter 210, and the receiver 212.

[0049] In one embodiment, the storage 204 is a computer readable storage medium. In some embodiments, the storage 204 includes both volatile and nonvolatile computer storage media. In some embodiments, the storage 204 includes volatile computer storage media. For example, the storage 204 can include RAM, including dynamic RAM (“DRAM”), synchronous dynamic RAM (“SDRAM”), and / or static RAM (“SRAM”). In some embodiments, the storage 204 includes non-volatile computer storage media. For example, the storage 204 can include a hard disk drive, a flash drive, or any other appropriate non-volatile computer storage device. In some embodiments, the storage 204 includes both volatile and non-volatile computer storage media. In some embodiments, the storage 204 stores both program code and related data, such as an operating system or other controller algorithms operating on the remote unit 102.

[0050] In one embodiment, the input device 206 can include any known computer input device, including a touch panel, buttons, a keyboard, a stylus, a microphone, etc. In some embodiments, the input device 206 can be integrated with the display 208, e.g., as a touch screen or similar touch-sensitive display. In some embodiments, the input device 206 includes a touch screen such that text can be input using a virtual keyboard displayed on the touch screen and / or by handwriting on the touch screen. In some embodiments, the input device 206 includes two or more different devices, such as a keyboard and a touch panel.

[0051] In one embodiment, the display 208 can include any known electronically controllable display or display device. The display 208 can be designed to output visual, audible, and / or tactile signals. In some embodiments, the display 208 includes an electronic display capable of outputting visual data to a user. For example, the display 208 can include, but is not limited to, a liquid crystal display (“LCD”), a light emitting diode (“LED”) display, an organic light emitting diode (“OLED”) display, a projector, or similar display device capable of outputting images, text, etc., to a user. As another, non-limiting, example, the display 208 can include a wearable display such as a smart watch, smart glasses, a heads-up display, etc. Further, the display 208 can be a component of a smart phone, a personal digital assistant, a television, a table computer, a notebook (laptop) computer, a personal computer, a vehicle dashboard, etc.

[0052] In certain embodiments, display 208 includes one or more speakers for producing sound. For example, display 208 can produce an audible alert or notification (e.g., a beep or chime). In some embodiments, display 208 includes one or more haptic devices for producing vibrations, motion, or other haptic feedback. In some embodiments, all or portions of display 208 can be integrated with input device 206. For example, input device 206 and display 208 can form a touchscreen or similar touch-sensitive display. In other embodiments, display 208 can be located near input device 206.

[0053] In some embodiments, receiver 212 is configured to receive channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurements, interference measurements, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points, where each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource sets for channel measurements, and at least one point of the multiple points is associated with one or more channel state information interference management resources for zero-power interference measurements. In various embodiments, processor 202 is configured to: perform channel measurements using the channel state information reference signal resource sets; and generate a set of channel state information reports based on the channel state information report configuration information, where each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point, and where the information indicating use of channel state information feedback for the multiple points includes: a radio resource control parameter within the channel state information report configuration; a number of channel state information reports within the channel state information report configuration; a quasi-co-location relationship involving one or more channel state information reference signal resources within the one or more channel state information reference signal resource sets; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration including at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across the multiple points; or some combination thereof.

[0054] In certain embodiments, the receiver 212 is configured to receive channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information - reference signal resource configurations associated with a set of channel state information channel state information reference signal resources for channel measurement and a set of channel state information interference management resources for interference measurement; and information indicating a use of channel state information feedback corresponding to a plurality of points, where each point of the plurality of points is associated with a non-zero-power channel state information reference signal resource of the set of channel state information reference signal resources for channel measurement, the plurality of points is associated with one or more channel state information interference management resources of the set of channel state information interference management resources for interference measurement, and each point of the plurality of points corresponds to a transmission and reception point or a panel of a transmission and reception point. In various embodiments, the processor 202 is configured to: generate a set of channel state information reports based on the channel state information report configuration information, where each channel state information report of the set of channel state information reports includes two parts; and report the set of channel state information reports to the network.

[0055] In various embodiments, the receiver 212 is configured to receive channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information - reference signal resource configurations associated with at least one set of non-zero-power channel state information reference signal resources for channel measurement; and information indicating a use of channel state information report configuration corresponding to a plurality of points, where the plurality of points is associated with a primary group of points or a secondary group of points. In various embodiments, the processor 202 is configured to: perform channel measurement using the at least one set of non-zero-power channel state information reference signal resources; and generate a set of channel state information reports based on the channel state information report configuration information.

[0056] Although only one transmitter 210 and one receiver 212 are illustrated, the remote unit 102 can have any suitable number of transmitters 210 and receivers 212. The transmitter 210 and the receiver 212 can be any suitable type of transmitters and receivers. In one embodiment, the transmitter 210 and the receiver 212 can be part of a transceiver.

[0057] Figure 3One embodiment of an apparatus 300 that can be used for channel state information reporting is depicted. The apparatus 300 includes one embodiment of the network unit 104. Furthermore, the network unit 104 can include a processor 302, a memory 304, an input device 306, a display 308, a transmitter 310, and a receiver 312. As can be appreciated, the processor 302, the memory 304, the input device 306, the display 308, the transmitter 310, and the receiver 312 can be substantially similar to the processor 202, the memory 204, the input device 206, the display 208, the transmitter 210, and the receiver 212 of the remote unit 102, respectively.

[0058] In various embodiments, such as new radio (“NR”), multiple transmit and receive points (“TRPs”), or multiple antenna panels within a TRP, can communicate with one user equipment (“UE”) simultaneously to enhance coverage, throughput, and / or reliability. In some embodiments, such as for Type-II codebooks with high resolution, the number of precoding matrix indicator (“PMI”) bits fed back from a UE in a gNB via uplink control information (“UCI”) can be very large (e.g., >1000 bits at large bandwidth) even for single-point transmission. In certain embodiments, reducing the number of PMI feedback bits per report can improve efficiency.

[0059] In some embodiments, multiple-input multiple-output (“MIMO”) enhancements in NR can include multi-TRP and multi-panel transmission. In such embodiments, multi-TRP transmission can improve the spectral efficiency, reliability, and / or robustness of a connection and can be used for both ideal and non-ideal backhaul.

[0060] In certain embodiments, to increase spectral efficiency using multi-TRP, non-coherent joint transmission (“NCJT”) can be used. Unlike coherent joint transmission, which uses tight synchronization between TRPs and high channel state information (“CSI”) accuracy for precoding design, NCJT requires each TRP to transmit different layers of the same codeword (e.g., single scheduling downlink control information (“DCI”) - two physical downlink shared channel (“PDSCH”) transmissions) or layers corresponding to a single codeword (e.g., two scheduling DCIs - two PDSCH transmissions).

[0061] In various embodiments, up to two-TRP joint transmission can be used. In such embodiments, a UE can be served by multiple TRPs forming a coordination cluster (e.g., possibly connected to a central processing unit).

[0062] In some embodiments, a UE can be dynamically scheduled to be served by one of multiple TRPs in a cluster. In certain embodiments, the network can pick two TRPs to perform joint transmission. In various embodiments, the UE can report CSI information needed by the network for it to decide on a multi-TRP downlink transmission scheme.

[0063] In certain embodiments, the number of transmission hypotheses increases exponentially with the number of TRPs in the coordination cluster. For example, for 4 TRPs, you can have 10 transmission hypotheses: (TRP 1), (TRP 2), (TRP 3), (TRP 4), (TRP 1, TRP 2), (TRP 1, TRP 3), (TRP 1, TRP 4), (TRP 2, TRP 3), (TRP 2, TRP 4), and (TRP 3, TRP 4). The overhead from reporting can increase dramatically with the size of the coordination cluster.

[0064] In various embodiments, the uplink transmission resources on which the CSI report is transmitted can be insufficient and partial CSI omission can be used. In some embodiments, the CSI report can be prioritized according to: 1) time domain behavior and physical channel, where more dynamic reports are prioritized over less dynamic reports and physical uplink shared channel (“PUSCH”) is prioritized over physical uplink control channel (“PUCCH”); 2) CSI content, where beam reports (e.g., 1stlayer reference signal received power (“L1-RSRP”) reports) are prioritized over regular CSI reports; 3) CSI corresponding service cell (e.g., with respect to carrier aggregation (“CA”) operation), where CSI corresponding to a primary cell (“PCell”) is prioritized over CSI corresponding to a secondary cell (“Scell”); and 4) report configuration identifier (e.g., reportConfigID). In such embodiments, the ordering can not take into account that some multi-TRP NCJT transmission hypotheses as measured by the UE can achieve low spectral efficiency performance and can be given a lower priority.

[0065] For the purpose of multi-TRP NCJT PDSCH transmission, certain embodiments described herein can enable a UE to: 1) reduce CSI report overhead without degrading performance; and / or 2) modify partial CSI omission priority to favor multi-TRP transmission hypotheses with higher spectral efficiency.

[0066] In some embodiments, intelligent techniques for CSI feedback reporting can be used such that different reports corresponding to different transmission configurations are jointly designed to reduce the overall CSI feedback overhead for multi-TRP and / or panel transmission.

[0067] In various embodiments, if a gNB is equipped with a two-dimensional (“2D”) antenna array with N1, N2 antenna ports per polarization with horizontal and vertical placement and communication occurs over N3 PMI subbands, and a PMI subband includes a set of resource blocks, each resource block including a set of subcarriers. In such embodiments, 2N1N2 CSI-RS ports can be used to enable downlink (“DL”) channel estimation with high resolution for NRII-type codebooks. To reduce uplink (“UL”) feedback overhead, discrete Fourier transform (“DFT”) based CSI compression in the spatial domain can be applied to L dimensions per polarization, where L < N1N2. The amplitude and phase values of the linear combination coefficients per subband can be fed back to the gNB as part of the CSI report. The 2N1N2 x N3 codebook per layer can take the following form: W = W1W2, where W1 is a 2N1N2 x 2L block-diagonal matrix with two identical diagonal blocks (L < N1N2), e.g., and B is a N1N2 x L matrix with columns extracted from a 2D oversampled DFT matrix as follows:

[0068]

[0069]

[0070]

[0071]

[0072] where the superscript T denotes the matrix transpose operation. O1, O2 oversampling factors are assumed for the 2D DFT matrix from which matrix B is extracted. W1 is common across all layers. W2 is a 2L x N3 matrix, where the i-th column corresponds to the linear combination coefficients of the 2L beams in the i-th subband. Only the indices of the L selected columns of B are reported, along with the oversampling indices taking O1O2 values. Note that W2 is independent for different layers.

[0073] In some embodiments, for II-type codebooks, frequency compression can be applied in conjunction with spatial compression. In addition to the spatial compression of II-type codebooks, inverse discrete Fourier transform (“IDFT”) based CSI compression can be applied in the frequency domain, where each beam of the frequency domain precoding vector is transformed using an inverse DFT matrix applied to the delay domain, and the amplitude and phase values of a subset of the delay domain coefficients are selected and fed back to the gNB as part of the CSI report. The 2N1N2 x N3 codebook per layer can take the following form: where W1 can have the same design and reporting framework as in another embodiment of II-type codebooks. W fis an NxM matrix (M < N3) with columns selected from a critically sampled size N3 DFT matrix, as follows:

[0074]

[0075]

[0076] For W f , only the indices of the M selected columns out of the predefined size N3 DFT matrix can be reported. Thus, L, M represent the equivalent spatial and frequency dimensions after compression, respectively. Finally, the 2LxM matrix represents the linear combination coefficients (“LCC”) of the spatial and frequency DFT basis vectors. and W f are independent for different layers. The amplitude and phase values of an approximately β fraction of the 2LM available coefficients are reported to the gNB as part of the CSI report (β < 1) (e.g., coefficients with zero amplitude can be indicated via a per-layer bitmap - since all coefficients reported within a layer can be normalized with respect to the coefficient with the largest amplitude (e.g., the strongest coefficient), the relative values of which are set to one, and no amplitude or phase information is explicitly reported for this coefficient - only an indication of the index of the strongest coefficient per layer is reported). Thus, for single-layer transmission, each layer can report the amplitude and phase values of up to coefficients per layer (e.g., along with the indices of the selected L, M DFT vectors), resulting in a significant reduction in the size of the CSI report compared to reporting information for 2N1N2xN3-1 coefficients.

[0077] In various embodiments, such as for Type-II port selection codebooks, only K (e.g., where K < 2N1N2) beamformed CSI-RS ports can be used in DL transmission to reduce complexity. The KxN3 codebook matrix per layer can take the following form: Here, and W3 follow the same structure as certain embodiments of Type-II codebooks and can be layer-specific. W1 is a Kx2L block-diagonal matrix with two identical diagonal blocks, e.g., and E is a matrix whose columns are standard unit vectors, as follows:

[0078]

[0079] where, is a standard unit vector with 1 at the i-th position. Here, d PS is an RRC parameter that takes the values {1, 2, 3, 4} under the condition that d PS < min(K / 2, L), while m PSAdopted values and is reported as part of the UL CSI feedback overhead. W1 is common across all layers.

[0080] For K = 16, L = 4 and d PS = 1, the 8 possible implementations of E corresponding to m PS = {0, 1,..., 7} are as follows:

[0081]

[0082] When d PS = 2, the 4 possible implementations of E corresponding to m PS = {0, 1, 2, 3} are as follows:

[0083]

[0084] When d PS = 3, the 3 possible implementations of E corresponding to m PS = {0, 1, 2} are as follows:

[0085]

[0086] When d PS = 4, the 2 possible implementations of E corresponding to m PS = {0, 1} are as follows:

[0087]

[0088] In summary, m PS parameterizes the position of the first 1 in the first column of E, while d PS indicates the row shift corresponding to different m PS values.

[0089] In certain embodiments, the NR Type I codebook can be a baseline codebook for NR with various configurations. In various embodiments, the Type I codebook can be an embodiment of the NR Type II codebook where for RI = 1, 2, L = 1, where a phase coupling value is reported for each subband, e.g., W2 is 2 x N3, where the first row is equal to [1, 1,..., 1] and the second row is equal to In some embodiments, φ0= φ1... = φ, e.g., a wideband report. For RI > 2, different beams can be used for each pair of layers. In some embodiments, the NR Type I codebook can be depicted as a low-resolution version of the NR Type II codebook with spatial beam selection per pair of layers and only phase combination.

[0090] In various embodiments, the codebook report can be partitioned into two parts based on the priority of the reported information. Each part can be separately encoded (e.g., part 1 can have a higher code rate). In certain embodiments, the content of the CSI report includes: 1) Part 1: RI + CQI + total number of coefficients; and 2) Part 2: SD basis indicators + FD basis indicators / layer + bitmap and / or layer + coefficient amplitude information and / or layer + coefficient phase information and / or layer + strongest coefficient indicator and / or layer. Furthermore, Part 2 CSI can be broken into subparts, where each subpart has a different priority (e.g., higher priority information is listed first). Such partitioning can be done to enable dynamic report size of the codebook based on available resources in the uplink stage.

[0091] In certain embodiments, Type II codebook can be based on aperiodic CSI reporting and reported in PUSCH only via DCI trigger (e.g., one exception). Type I codebook can be based on periodic CSI reporting (e.g., PUCCH) or semi-persistent CSI reporting (e.g., PUSCH or PUCCH) or aperiodic reporting (e.g., PUSCH). Table 1 illustrates one embodiment of prioritization.

[0092] Table 1

[0093]

[0094] In some embodiments, the priority of N Rep CSI reports can be based on: 1) a CSI report corresponding to one CSI reporting configuration for one cell can have a higher priority than another CSI report corresponding to one other CSI reporting configuration for the same cell; 2) a CSI report intended for one cell has a higher priority than another CSI report intended for another cell; 3) a CSI report can have a higher priority based on the CSI report content (e.g., a CSI report carrying L1-RSRP information has a higher priority); and / or 4) based on their type (e.g., a CSI report is aperiodic, semi-persistent, or periodic), and whether the report is transmitted via PUSCH or PUCCH, a CSI report can have a higher priority.

[0095] In various embodiments, the CSI reports can be prioritized as follows, where a CSI report with a lower ID has a higher priority:

[0096] Pri iCSI (y, k, c, s) = 2 · N cells · M s · y + N cells · M s · k + Ms • c + s, where s: CSI report configuration index, M s : maximum number of CSI report configurations, c: cell index, N cells : number of serving cells, k: 0 for CSI reporting of L1-RSRP or Layer 1 signal to interference and noise ratio (“L1-SINR”), otherwise 1, y: 0 for aperiodic reporting, 1 for semi-persistent reporting on PUSCH, 2 for semi-persistent reporting on PUCCH, 3 for periodic reporting.

[0097] In certain embodiments, for multi-TRP NCJT transmission, two embodiments can be used: 1) one downlink scheduling assignment is transmitted from one TRP, which schedules two PDSCH transmissions from two TRPs respectively - only one transport block (“TB”) can be transmitted, which layers are split across the two scheduled PDSCHs; and 2) two downlink scheduling assignments with one scheduling DCI can be transmitted from each TRP. Each DCI can schedule a PDSCH transmission from the corresponding TRP. One or more TBs can be transmitted from each TRP based on the rank of the channel from each TRP.

[0098] In some embodiments, a UE can use the CSI framework to report CSI information for the network. From the UE’s perspective, the CSI reporting can be independent of what downlink NCJT scheme is used. The triggering mechanism between the reporting settings and resource settings can be summarized in Table 2.

[0099] Table 2: Triggering mechanism between reporting settings and resource settings

[0100]

[0101] In various embodiments: all associated resource settings for CSI reporting settings can need to have time domain behavior; periodic CSI-RS and / or interference management (“IM”) resources and CSI reporting can be assumed to be present and active once configured by RRC signaling; aperiodic and semi-persistent CSI-RS and / or IM resources and CSI reporting can be explicitly triggered or activated; aperiodic CSI-RS and / or IM resources and aperiodic CSI reporting - triggered jointly by transmitting DCI format 0-1; and / or semi-persistent CSI-RS and / or IM resources and semi-persistent CSI reporting can be activated independently.

[0102] In certain embodiments, such as for multi-TRP NCJT, an aperiodic CSI report can be triggered to inform the network about the channel conditions per transmission hypothesis, as using periodic CSI-RS for TRPs in a coordination cluster constitutes a large overhead. In various embodiments, for aperiodic CSI-RS and / or IM resources and aperiodic CSI reporting, a joint triggering can be done by transmitting a DCI format 0_1. The DCI format 0_1 contains a CSI request field (e.g., 0 to 6 bits). A non-zero request field points to a so-called aperiodic triggering state configured by RRC. The aperiodic triggering state can be defined as a list of up to 16 aperiodic CSI report settings identified by a CSI report setting ID for which the UE computes CSI and transmits it on the scheduled PUSCH transmission.

[0103] Figure 4 FIG. 400 is a diagram 400 illustrating one embodiment of an aperiodic triggering state defining a list of CSI report settings. In particular, the diagram 400 includes a DCI format 0_1 402, a CSI request codepoint 404, and an aperiodic triggering state 2 406. Further, the aperiodic triggering state 2 includes a ReportConfigID x 408, a ReportConfigID y 410, and a ReportConfigID z 412.

[0104] In some embodiments, if a CSI report setting is linked with an aperiodic resource setting (e.g., which can include multiple resource sets), an aperiodic NZP CSI-RS resource set for channel measurement, an aperiodic CSI-IM resource set, and / or an aperiodic NZP CSI-RS resource set for IM for a given CSI report setting can be included in the aperiodic triggering state definition. For an aperiodic NZP CSI-RS, a quasi-co-location (“QCL”) source can be configured in the aperiodic triggering state. The UE can assume that the resources used for computing channel and interference can be processed with the same spatial filter (e.g., regarding “QCL-TypeD” quasi-co-location).

[0105] Figure 5 FIG. 500 is a code example 500 illustrating one embodiment of a procedure by which an aperiodic triggering state indicates resource sets and QCL information.

[0106] Figure 6 FIG. 600 is a code sample 600 illustrating one embodiment of an RRC configuration including a non-zero power channel state information reference signal (“NZP-CSI-RS”) resource 602 and a CSI-IM-resource 604.

[0107] Table 3 shows uplink channels for CSI reporting according to CSI codebook type.

[0108] Table 3: Uplink channels for CSI reporting according to CSI codebook type

[0109]

[0110] In certain embodiments, for aperiodic CSI reporting, PUSCH-based reporting can be divided into two CSI parts: CSI part 1 and CSI part 2. The reason can be that the size of CSI payload varies significantly, and thus, worst-case UCI payload size design can lead to large overhead.

[0111] In various embodiments, CSI part 1 has a fixed payload size (e.g., can be decoded by gNB without a priori information) and can contain the following: 1) RI (if reported), CRI (if reported), and CQI for the first codeword; and / or 2) the number of non-zero wideband amplitude coefficients per layer for Type II CSI feedback on PUSCH.

[0112] In some embodiments, CSI part 2 has a variable payload size that can be derived from the CSI parameters in CSI part 1, and can contain PMI and CQI for the second codeword if RI > 4.

[0113] In one example, if the aperiodic trigger state indicated by DCI format 0_1 defines 3 reporting settings x, y, and z, the aperiodic CSI reporting for CSI part 2 can be ordered as shown in Figure 7 .

[0114] Figure 7is a schematic block diagram 700 illustrating one embodiment of partial CSI omission for PUSCH-based CSI. The schematic diagram 700 includes ReportConfigID x 702, ReportConfigID y 704, and ReportConfigID z 706. Further, the schematic diagram 700 includes a first report 708 (e.g., number of requests to report) corresponding to ReportConfigID x 702, a second report 710 (e.g., number of requests to report) corresponding to ReportConfigID y 704, and a third report 712 (e.g., number of requests to report) corresponding to ReportConfigID z 706. Each of the first report 708, the second report 710, and the third report 712 includes CSI part 1 720 and CSI part 2 722. The ordering 723 of CSI part 2 across the reports is the CSI part 2 of the first report 724, the CSI part 2 of the second report 726, and the CSI part 2 of the third report 728. Further, the CSI part 2 reports can result in Report 1 WB CSI 734, Report 2 WB CSI 736, Report 3 WB CSI 438, Report 1 Even SB CSI 740, Report 1 Odd SB CSI 742, Report 2 Even SB CSI 744, Report 2 Odd SB CSI 746, Report 3 Even SB CSI 748, and Report 3 Odd SB CSI 750.

[0115] In various embodiments, CSI reporting can be prioritized according to: 1) time domain behavior and physical channel, where more dynamic reporting is prioritized over less dynamic reporting and PUSCH is prioritized over PUCCH; 2) CSI content, where beam reporting (e.g., L1-RSRP reporting) is prioritized over regular CSI reporting; 3) CSI corresponding service cell (e.g., for CA operation) - CSI corresponding to PCell is prioritized over CSI corresponding to Scell; and / or 4) report configuration identifier (e.g., reportConfigID). In such embodiments, the ordering can not consider some multi-TRP NCJT transmission hypotheses as measured by the UE, can achieve low spectral efficiency performance, and can be given a lower priority.

[0116] In various embodiments, one or more elements or features (e.g., CSI measurement, feedback generation, and / or reporting) from different embodiments can be combined, which can reduce overall CSI feedback overhead.

[0117] In some embodiments, the following assumptions can be used: 1) the concept of “TRP” includes at least one of a TRP, a panel, a communication (e.g., signal and / or channel) associated with a control resource set (“CORESET”) pool in a general manner, and / or a communication associated with a TCI state from a transmission configuration includes at least two TCI states; 2) the codebook type used is arbitrary - unless otherwise specified, different codebook types (e.g., Type I and Type II codebooks) can be flexibly used; 3) at least aperiodic CSI reporting on PUSCH is supported - other CSI reporting configuration types such as semi-persistent CSI reporting on PUSCH can also be used; 4) at least multiple TRPs and / or panels with single DCI can be used - multiple TRPs and / or panels with multiple DCIs can also be used; and / or 5) at least multiple TRPs and / or panels with spatial division multiplexing (“SDM”) can be used.

[0118] In a first embodiment, the network can indicate to the UE the need for multi-TRP and / or panel CSI feedback via: 1) introducing a new radio resource control (“RRC”) parameter (e.g., NTRP or CSIGroup) - based on this, there can be multiple CSI reports, CSI sub-reports, or CSI components for one CSI reporting configuration - this parameter can be incorporated in CSI reporting prioritization; 2) introducing a new reporting quantity (e.g., for CSI reporting involving mTRP) - each report can correspond to a reporting setting; 3) multiple TRPs can be implied from QCL relations on RS (e.g., aperiodic CSI-RS); 4) one or more codepoints involving different DCI triggering states can be assigned to multi-TRP settings for CSI feedback - each state (e.g., including one or more CSI reporting settings) can be triggered by the network and RRC configured; 5) multiple TRPs can be implied from the higher layer parameter CodebookType; 6) multiple TRPs can be implied from the higher layer parameter CodebookConfig; and / or 7) introducing a new RRC parameter groupBasedCSIReporting (e.g., in a CSI reporting configuration) - this parameter can enable multi-TRP and / or panel CSI feedback with a CSI report including a group of N g CSI reports, sub-CSI reports, or CSI components.

[0119] In various embodiments, the following CSI reporting structure is assumed, where, without loss of generality, all CSI reports or aperiodic (y = 0) and do not carry L1-RSRP or L1-SINR info (k = 1), N TRP = 3 and M s = 2. For TRP t, the report corresponds to rank v cinformation of the codebook, where the layers of each TRP t are partitioned into two groups of v' t and v" t layers respectively, where v' t + v" t = v t. t and v" t layers respectively, where v t = v' t + v" t CSI report 1 : includes information corresponding to the first v' 1 layers intended for TRP 1. CSI report 2: includes information corresponding to the last v" 1 layers intended for TRP 1. CSI report 3: includes information corresponding to the first v' 2 layers intended for TRP 2. CSI report 4: includes information corresponding to the last v" 2 layers intended for TRP 2. CSI report 5: includes information corresponding to the first v' 3 layers intended for TRP 3. CSI report 6: includes information corresponding to the last v" 3 layers intended for TRP 3.

[0120] In a second embodiment, a subset of the following CSI reporting assumptions can be considered as follows: 1) single TRP transmission, where the codebook at TRP t is based on CSI reports with indices 2(t-1)+1 and 2(t-1)+2; and 2) joint transmission involving TRP t and , the codebook at TRP t can be based on CSI reports with indices 2(t-1)+1, while the codebook at TRP will be based on CSI reports with indices , where Possibly excluding the interchange of the order of the content in the CSI reports with indices 2(t-1)+1 and 2(t-1)+2.

[0121] In some embodiments, each CSI report can be triggered via a CSI report setting. Each CSI report setting has a corresponding set of one or more CSI resource settings. Because a CSI report with index 2(t-1)+1 is involved in a multi-TRP / panel transmission, the codebook parameters can depend on interference from other TRPs co-transmitted. Therefore, a CSI report setting corresponding to a given CSI report with index 2(t-1)+1 can be configured with multiple CSI resource settings, wherein a first CSI resource setting can indicate a non-zero power (“NZP”) CSI-RS resource set for channel measurements and subsequent CSI resource settings can indicate NZP CSI-RS and / or CSI-IM for interference measurements. The information in the corresponding CSI report may be susceptible to inter-layer interference from different TRPs and can be designed based on both channel and interference measurements. A CSI report with index 2(t-1)+2 may be triggered only in the case of a single TRP transmission. Therefore, in cases where the report may only measure the channel, triggering a single CSI resource setting for the corresponding CSI report setting may be sufficient.

[0122] In the third embodiment, different CSI resource settings can be defined according to different CSI report settings as follows: 1) For a CSI report setting corresponding to a CSI report with index 2(t-1)+1 (e.g., which includes PMIs for the first set of layers for TRP t, which can be triggered with respect to multiple TRP transmissions), more than one CSI resource setting is triggered; and 2) For a CSI report setting corresponding to a CSI report with index 2(t-1)+2 (e.g., which includes PMIs for the last set of layers for TRP t, which can be triggered with respect to a single TRP transmission), more than one CSI resource setting is triggered.

[0123] In various embodiments, each codebook may contain a single CSI report. In one example, the CSI report may be reconstructed as follows, where, without loss of generality, all CSI reports are either aperiodic (y = 0) and do not carry L1-RSRP or L1-SINR information (k = 1), N cells =3 and M=2. The report corresponds to rank v. c The codebook contains TRP t information, where each TRP t layer is partitioned into layers with v' respectively. t and v” t The layer has two groups, where v t =v' t +v” t CSI report t: Information corresponding to TRP t. CSI report section 1: Layer-common info + three triplet values ​​(v' t ,v”t v t ) of the three-tuple values (v t , v t ) can not be required. In addition, an indicator of the size of different groups in CSI report part 2 can be used. t ,v t ,v t ) of the three-tuple values (v t , v t ) can not be required. In addition, an indicator of the size of different groups in CSI report part 2 can be used.

[0124] In a fourth embodiment, for multi-TRP transmission, one report per TRP can be defined, where: 1) the per-layer PMI information included in CSI part 2 group 1 can be based on one or more of NZP CSI-RS for CMR, NZP CSI-RS for interference measurement resource (“IMR”), and CSI-IM; 2) the per-layer PMI information included in CSI part 2 group 2 can be based on one or more of NZP CSI-RS for CMR and CSI-IM. As can be appreciated, the order of interchanging the contents in CSI part 2 group 1 and CSI part 2 group 2 is not excluded.

[0125] In some embodiments, there can be codeword-to-TRP mapping. In various embodiments, under single-DCI multi-TRP, a complication can arise whenever joint transmission between two TRPs, t, t* will occupy more than one codeword. In such embodiments, it can be beneficial to transmit the sequence of transmissions corresponding to layers from one TRP by a dedicated codeword, where layers corresponding to another TRP are transmitted by a different codeword. This can apply to all layers corresponding to one TRP, or to a first and / or last set of layers per TRP. In certain embodiments, the sequence of signals corresponding to different layers are multiplexed to one codeword, as long as the total number of layers does not exceed 4. Whenever the number of layers exceeds 4 (e.g., but not more than 8 layers), two codewords are used, where the first codeword is assigned to v layers, and the remaining v layers are assigned by the second codeword, where v all is the total number of layers [6]. Thus, the difference between the number of layers processed by each codeword does not exceed one. In view of this, to facilitate one-to-one codeword-to-TRP mapping, at least for a first set of layers per TRP, a fifth embodiment can be used.

[0126] In a fifth embodiment, for multi-TRP transmission with single-DCI, the number of layers per TRP can be constrained such that:

[0127] Where c = 0 or 1.

[0128] Constraints can be applied to the first set of layers, the second set of layers, or the total number of layers in each TRP t. Furthermore, the number of layers in the first set of layers within each TRP can be constrained such that v' t ≤δ, where δ is the maximum number of layers multiplexed into a codeword, for example, δ=4.

[0129] In various embodiments, changes to the CSI priority ordering may exist. In some embodiments, parameters may be used in the CSI report index in the PUSCH, which represents the number of TRPs or the number of CSI report groups per cell, as found in the sixth embodiment.

[0130] In the sixth embodiment, there may be a change in the priority order of CSI reports:

[0131] Pri iCSI (y, k, c, g, s) = 2·N cells ·N g ·M s ·y+N cells ·N g ·M s ·k+N g ·M s ·c+M s ·g+s, where N g This represents the total number of CSI reporting groups or TRPs for each cell, and g is a value of 0, 1, ..., N. g The index corresponding to -1. In some embodiments, the priority function can be as follows:

[0132] Pri iCSI (y, k, c, s, g) = 2·N cells ·M s ·N g ·y+N cclls ·M s ·N g ·k+M s ·N g ·c+N g •s+g. It should be noted that parameter names other than the number of CSI report groups or the number of TRPs per cell are not excluded. In various embodiments, CSI reports may include parameters with values ​​0, 1, ..., N. g A set of N corresponding to the index of -1 g Individual CSI reports or CSI components.

[0133] In some embodiments, there can be a joint design across CSI reports. In one embodiment, the CSI reports can be configured with a type of codebook belonging to Type-II. If such an embodiment, the layer-common information related to the codebook of TRP t can be placed in CSI report 2(t-1)+1.

[0134] In a seventh embodiment, the layer-common information of the codebook corresponding to TRP t (e.g., an indicator without layer index such as a selected spatial beam index or a tap window information) can be placed in CSI report 2(t-1)+1 only.

[0135] In various embodiments, the layer-common information related to the codebook of different TRPs with joint transmission can be placed in CSI report 1 only. In some embodiments, a beam bitmap bt of length 2L indicating the subset of spatial beams selected for each TRP t can be included in the CSI report with index 2(t-1)+1, where nnz(bt) = Lt, where nnz(x) indicates the number of entries with non-zero values in any vector x. L1+L2+L3≥ 2L (e.g., different TRPs can reuse the same beams). Thus, the number of beams per cell c can be reduced to Lt≤ 2L and the CSI report size can be reduced thereby (e.g., fewer bits corresponding to the coefficient bitmap per layer can be reported). In certain embodiments, a bitmap can be used to indicate the subset of selected beams for each CSI report with indices 2(t-1)+1 and 2(t-1)+2 (e.g., one bitmap per report). As can be appreciated, other methods of reporting the subset of selected beams are not excluded (e.g., reporting a combined value instead of a bitmap).

[0136] In an eighth embodiment, for Type-II codebook or any of its derivatives (e.g., eType-II codebook), Type-II port selection codebook, or eType-II port selection codebook, only the spatial beams selected for TRP t can be reported in CSI report 2(t-1)+1. In such an embodiment, a beam bitmap bt of length 2L can be reported in CSI report 2(t-1)+1, where nnz(bt) = Lt, where different TRPs can reuse the same beams. Only the coefficients corresponding to the Lt beams for TRP t can be reported.

[0137] In a ninth embodiment, for Type-II codebook or any of its derivatives (e.g., eType-II codebook), Type-II port selection codebook, or eType-II port selection codebook, a bitmap in one or more of CSI reports 2(t-1)+1 and 2(t-1)+2 for TRP t can be reported, where the bitmap indicates the indices of spatial beams used in the CSI report.

[0138] In some embodiments, one issue in CQI reporting is handling different CSI reporting configurations. For ease of explanation, let vt+v’t*≤4 for any TRP t, t* and vt≤4 for all TRPs (e.g., using one codebook even for joint transmission). In certain embodiments, a wideband (“WB”) CQI can be used.

[0139] In various embodiments, a WB CQI value q’t (e.g., 4 bits) can be reported in CSI report 2(t-1)+1, indicating the CQI for TRP t transmission with rank vt. In certain embodiments, a differential WB CQI value q”t (e.g., 2 bits) can be reported in CSI report 2(t-1)+2, indicating the CQI index offset value for TRP t single transmission with full rank vt, where the offset value is relative to q’t. In some embodiments, a differential WB CQI value q’t,t* (e.g., 2 bits) can be reported in CSI report 2(t-1)+1, CSI report 2(t*-1)+1, or both, indicating the CQI index offset under joint transmission from two TRPs t, t* with ranks vt, vt*, respectively. The offset value is relative to an arbitrary function qJTt,t* = f(q’t, q’t*), e.g., f(a, b) = max(a, b) or or

[0140] In certain embodiments, a subband (“SB”) CQI value for each CQI subband index w can be reported in a similar manner (e.g., reporting a subband differential CQI value p”t(w) with respect to a function f2(q’t, q”t)) for full rank transmission vt of TRP t to be reported in CSI report 2(t-1)+2. In some embodiments, a subband differential CQI value pJTt,t*(w) can be defined with respect to qJTt,t* to be reported in CSI report 2(t-1)+1, CSI report 2(t*-1)+1, or both.

[0141] In a tenth embodiment, WB CQI q’t and differential CQI q”t, qJTt,t* as well as p”t(w) and pJTt,t*(w) can be reported across CSI reports.

[0142] In various embodiments, if there is multi-DCI multi-TRP with vt< 4, the codeword to TRP mapping can be one-to-one (e.g., layers corresponding to TRP t are exclusively mapped to one codeword with the corresponding WB CQI level). As can be appreciated, WB differential CQI can be reported for joint transmission to address SINR degradation (e.g., and possible CQI index drop). If yes, qJTt,t*≠ qJTt*,t, where qJTt,t*indicates the CQI level offset of the codeword related to TRP t due to interference from TRP t*. Thus, qJTt,t*may be reported in CSI report 2(t-1)+1, while qJTt*,t can be reported in CSI report 2(t*-1)+1. The same applies to pJTt,t*(w), pJTt*,t(w). As can be appreciated, the same behavior applies even under single-DCI multi-TRP whenever the codeword to TRP mapping is one-to-one.

[0143] In an eleventh embodiment, for multi-DCI multi-TRP or under single-DCI multi-TRP with one-to-one codeword to TRP mapping, qJTt,t*≠ qJTt*,t, and pJTt,t*(w)≠ pJTt*,t(w) and thus qJTt,t*, pJTt,t*(w) can need to be reported in CSI report 2(t-1)+1, while qJTt*,t, pJTt*,t(w) can be reported in CSI report 2(t*-1)+1.

[0144] As can be appreciated, to incorporate WB differential CQI, a type of CQI format indicator can be used to accommodate the differential WB CQI value (e.g., an additional value for the parameter cqi-FormatIndicator can be introduced - cqi-FormatIndicator = “DiffwidebandCQI”). In certain embodiments, an additional CQI format indicator can be used to reflect both differential WB and SB reporting (e.g., cqi-FormatIndicator = “DiffsubbandCQI”).

[0145] In a twelfth embodiment, in addition to the current values “widebandCQI” and “subbandCQI”, additional values for the parameter cqi-FormatIndicator can be used to accommodate WB differential CQI reporting (e.g., cqi-FormatIndicator = “DiffwidebandCQI”), and possibly SB differential CQI reporting (e.g., cqi-FormatIndicator = “DiffsubbandCQI”).

[0146] In some embodiments, there can be hypothesis reduction. Such embodiments can help improve the efficiency of CSI reporting by using CQI information to reduce the size of the aggregation of CSI reports resulting from multi-TRP transmission. Given that the UE has sufficient knowledge of the channels from all TRPs, it can be in a better position to select the best hypothesis (e.g., the best transmission scheme based on some metric). However, due to other considerations on the network side, the UE selecting the best hypothesis alone can not be beneficial to the network. For example, one way to reduce the overall CSI feedback overhead can be for the UE to report CSI feedback only related to a subset of hypotheses. For example, assume that the UE can report CSI feedback only related to single transmission by TRP 1, or joint transmission between TRP 1, 2 or joint transmission between TRP 2, 3 (e.g., 3 hypotheses in total). If so, the UE can only feedback CSI reports 1, 2, 3, 5. The UE can then have to report the selected hypothesis to the network to avoid ambiguity. Although this approach can reduce the overall CSI feedback overhead by about 1 / 3 of its size, it deprives the network of the opportunity to select the hypothesis based on network traffic or other resource allocation considerations. This can be referred to as "hard channel hypothesis reduction."

[0147] In various embodiments, there can be a balance between hard hypothesis reduction and full CSI feedback reporting. In such embodiments, explicit signaling of the selected hypothesis from the UE to the network can not be necessary. This can be referred to as "soft channel hypothesis reduction" and can be based on omitting a subset of CSI reports corresponding to unfavorable hypotheses based only on the reported CQI values. For example, this embodiment can be as follows: 1) divide the CSI reports into two groups based on the CQI values corresponding to different hypotheses - the threshold can depend on other parameters (e.g., the reported rank of each report); 2) report the CSI reports that satisfy the threshold test fully; 3) can report the CSI reports that do not satisfy the threshold test partially - for example, a) feedback only CSI part 1 of the CSI report; b) feedback CSI part 1 + CSI part 2 group 0 of the CSI report; c) feedback CSI part 1 + CSI part 2 group 0 + CSI part 2 group 1 of the CSI report; 4) assume that there are K CSI reports corresponding to H channel and / or interference hypotheses - the classification of the CSI reports into two groups can be based on one (or a combination) of the following: a) feedback CSI reports fully, and feedback CSI reports partially, where 0 < a < 1 is fixed, set by a rule, or RRC configured; b) feedback feedback CSI reports for component channels and / or interference hypotheses with effective WB CQI indices greater than or equal to a threshold γ, while partially feeding back the rest of the CSI reports. It should be noted that the ceiling operator may be replaced with the floor or round<·> operator.

[0148] In some embodiments, the CSI report classification can be made into two groups and can be indicated by the network using an additional field corresponding to the CSI trigger state (e.g., CSI-AperiodicTriggerState), implicitly using a predefined rule on the CSI report ID, or via the introduction of a higher layer parameter (e.g., an RRC parameter). In various embodiments, other methods of network implementation of CSI report classification are not precluded.

[0149] In a thirteenth embodiment, K CSI reports can be classified into two possibly disjoint groups, each group of size K1and K2, respectively, where K1+ K2= K. The CSI reports belonging to the first group are reported completely, while the CSI reports belonging to the second group are reported partially or otherwise omitted completely. The CSI report classification can be UE triggered, based on the rank of the report for each CSI report, the value of the reported CQI index, or both. In certain embodiments, the CSI report classification can be network triggered, based on the CSI trigger state reported to the user, the CSI report ID, or both. As can be appreciated, other bases that can facilitate the CSI report classification process are not precluded.

[0150] In some embodiments, there can be a common rotation parameter. In various embodiments, the reported CQI value can correspond to different layers' precoding matrices (e.g., codebooks) in more than one CSI report. A series of reports can be generated such that one report can only be combined with one previous report. However, a report can be combined with any subsequent CSI report. Consider the following example, given a series of CSI reports, if only the following CSI report combination pairs are allowed (1,2), (2,3), (1,4), (2,5), (3,6), we can see that CSI report 2 or CSI report 3 can only be combined with one previous report (e.g., CSI report 1 and CSI report 2, respectively). However, CSI report 2 can be combined with more than one subsequent report (e.g., CSI report 3 and CSI report 5). In this case, assuming that the report can only be combined with a previous CSI report in the list and optimize its corresponding precoding vector accordingly, the UE first searches for the precoding matrix of the given CSI report. It should be noted that assuming its corresponding layer can not be combined with any layer corresponding to another report, the first report has no previous report and thus it optimizes the corresponding vector of the precoding matrix.

[0151] Figure 8 is a schematic block diagram 800 illustrating one embodiment of two TRPs jointly transmitting data to one user equipment using a single codeword. Specifically, the schematic block diagram 800 includes a first TRP 802, a second TRP 804, and a UE 806. The precoding matrix P A1 808, P A2 810, P r A1 812, and P r A2 814 is transmitted as shown.

[0152] Specifically, the precoding matrix P A1 in CSI report 1 is indicated without any constraints from the precoding matrix of any other report. The precoding matrix P A2 in CSI report 3 can be designed to have constraints as close as possible to being "orthogonal" to P A1 . This can result in a qualitative difference between the layers corresponding to CSI report 1 and CSI report 3. If the layers across the two reports are multiplexed into a single codeword, it can cause a performance loss. To minimize the qualitative difference between the performance of the layers corresponding to the two CSI reports and maximize the CQI level under joint transmission, it can be best to have a rotation transform Λ such that and where Λ is a diagonal matrix of the form

[0153]

[0154] where kron(A, B) is the Kronecker product of two matrices A, B, exp(a) = e α and is a diagonal matrix with diagonal elements a1,..., a n This can imply that in P A2 During the reporting period, the best rotation factors θ1and θ2may be reported. This θ1and θ2reporting can be similar to the l i and m i , but with potentially different value ranges. The same rotation factors can be applied to all layers of this CSI report and the previous CSI report it is combined with, whether these CSI reports belong to the same TRP or different TRPs. Because there is only one previous report, there can be no confusion as to what rotation factors are used for any joint transmission combination given the CSI report is combined with.

[0155] As can be appreciated, if both CSI reports belong to the same TRP, one way in which this rotation can be implied is that the rotation factors in one CSI report override the rotation factors in the previous CSI report (e.g., for eType-II codebooks). For example, the field i 1,1 in CSI report 2(t-1)+2 can override the field i 1,1 corresponding to CSI report 2(t-1)+2. As can be appreciated, this can equally apply to the beam indicator field i 1，2 In addition, the possibility of rotation factor fields or beam indicator fields being overridden across CSI reports corresponding to different TRPs can not be excluded.

[0156] In a fourteenth embodiment, the reported values of parameters corresponding to one CSI report can be altered based on the reported values of another CSI report. For example, the rotation factors, the spatial beam set indices, or both, reported in one CSI report can be applied to the codebook corresponding to another CSI report (e.g., the CSI report with the smaller index value). In such embodiments, this can be done by further rotating a subset of the codebook parameters in one CSI report based on the rotation factors and / or spatial beam set indices reported in another CSI report or via overriding the rotation factors and / or spatial beam set indices in one CSI report with the rotation factors reported in another CSI report.

[0157] In some embodiments, there can be a compact CSI reporting multiplexing for NCJT two-TRP PDSCH transmission. In various embodiments, a UE receives an uplink scheduling DCI with non-fallback format 0_1. The DCI indicates the uplink time and frequency resources on which the device should transmit a PUSCH. The DCI contains a non-zero CSI request (e.g., 0 to 6 bits) to request an aperiodic CSI report on the PUSCH.

[0158] In various embodiments, the CSI request points to an aperiodic trigger state “m” configured with an RRC parameter enable_depend_reporting set to true. In such embodiments, the aperiodic trigger state m contains “N” CSI-ReportConfig whose reportConfigld are m1, m2,..., mN, respectively. The CSI-ReportConfig m1 is configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q1 (e.g., indicating the primary transmission TRP). The CSI-ReportConfig m2,..., mN are configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q2,..., QN, respectively, where Q2,..., QN ≠ Q1 (e.g., indicating the helper TRP that can be used in two-TRP NCJT together with the primary TRP). The corresponding CSI reports will be denoted as Report 1,..., Report N. N In various embodiments, the CSI request points to an aperiodic trigger state “m” configured with an RRC parameter enable_depend_reporting set to true. In such embodiments, the aperiodic trigger state m contains “N” CSI-ReportConfig whose reportConfigld are m1, m2,..., mN, respectively. The CSI-ReportConfig m1 is configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q1 (e.g., indicating the primary transmission TRP). The CSI-ReportConfig m2,..., mN are configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q2,..., QN, respectively, where Q2,..., QN ≠ Q1 (e.g., indicating the helper TRP that can be used in two-TRP NCJT together with the primary TRP). The corresponding CSI reports will be denoted as Report 1,..., Report N. N In various embodiments, the CSI request points to an aperiodic trigger state “m” configured with an RRC parameter enable_depend_reporting set to true. In such embodiments, the aperiodic trigger state m contains “N” CSI-ReportConfig whose reportConfigld are m1, m2,..., mN, respectively. The CSI-ReportConfig m1 is configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q1 (e.g., indicating the primary transmission TRP). The CSI-ReportConfig m2,..., mN are configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q2,..., QN, respectively, where Q2,..., QN ≠ Q1 (e.g., indicating the helper TRP that can be used in two-TRP NCJT together with the primary TRP). The corresponding CSI reports will be denoted as Report 1,..., Report N. N In various embodiments, the CSI request points to an aperiodic trigger state “m” configured with an RRC parameter enable_depend_reporting set to true. In such embodiments, the aperiodic trigger state m contains “N” CSI-ReportConfig whose reportConfigld are m1, m2,..., mN, respectively. The CSI-ReportConfig m1 is configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q1 (e.g., indicating the primary transmission TRP). The CSI-ReportConfig m2,..., mN are configured with a NZP-CSI-RS resource set for channel measurement and a TCI state Q2,..., QN, respectively, where Q2,..., QN ≠ Q1 (e.g., indicating the helper TRP that can be used in two-TRP NCJT together with the primary TRP). The corresponding CSI reports will be denoted as Report 1,..., Report N.

[0159] In some embodiments, each report carries rank information (“RI”), precoder information (“PMI”), and channel quality indicator (“CQI”) denoted by (r i , P i , CQI i ) for each report i. Report 1 is computed under the assumption H1: single-DCI single-PDSCH transmission with TCI codepoint with a single TCI state Q1. In the case of enable_depend_reporting = true, the UE computes reports 2,..., N under the assumption H2: single-DCI single-PDSCH transmission with TCI codepoint with a single TCI state Q1. In the case of enable_depend_reporting = true, the UE computes reports 2,..., N under the assumption H2: single-DCI single-PDSCH transmission with TCI codepoint with a single TCI state Q1. i In some embodiments, each report carries rank information (“RI”), precoder information (“PMI”), and channel quality indicator (“CQI”) denoted by (r i) of the single-DCI NCJT transmission. In addition, the NZP CSI-RS resource for inter-layer interference measurement has QCL information set to Q1.

[0160] Because the reporting 2,..,N assumes NCJT transmission, the UE reports (r2,..,r N )≤2 is the number of layers transmitted per TB per TCI state. The sum of the UE ranks reported in the case of NCJT transmission will be ≤4. According to this assumption, P2,..,P N and CQI2,..,CQI N . For i=2,..,N, the CSI report i (r i , P i , CQI i ) can be interpreted as a rank r i transmission, P i is the precoder used at the TRP with TCI state Q i , and CQI i is the expected modulation and coding rate for the TB under the assumption H i .

[0161] Finally, the UE orders the transmission assumptions (H i , i=2,...,N) in decreasing order of spectral efficiency performance to determine the priority of each report i (i=2,...,N) during multiplexing on the PUSCH resource. This priority reordering can override other priorities.

[0162] In certain embodiments, the UE can implicitly determine the transmission assumptions H N (i=2,...,N) from the QCL information of the channel measurement NZP-CSI-RS resource set for ReportConfig m1,m2,...,m i (e.g., rather than using explicit RRC signaling). In some embodiments, r i and CQI i can be interpreted as differential values with respect to r1 and CQI1. In various embodiments, the non-precoded NZP-CSI-RS transmitted from the primary TRP can be combined with the precoder information P1 for inter-layer interference measurement.

[0163] In some embodiments, the UE orders the transmission assumptions (H i, i = 2,..., N) to determine a priority rank of each report. In various embodiments, compact aperiodic CSI reporting on PUSCH for multi-TRP NCJT transmission can be implemented, where the number of transmission hypotheses only increases linearly with the number of transmission points.

[0164] In certain embodiments, the UE first computes CSI report 1 under the following transmission hypothesis: single-TRP transmission from the TRP with TCI state Q1 and reference signal QCL used for the physical downlink control channel (“PDCCH”) carrying DCI format 0_1. Afterwards, the UE computes the rest of the NCJT transmission hypotheses for TCI codepoints (Q1, Qi, i = 2,..., N) under different assumptions relying on (r1, P1, CQI1). In various embodiments, report 1 (e.g., single-TRP transmission hypothesis) can have the highest priority, followed by reports in descending order of spectral efficiency performance that can override another priority ordering. This priority ordering can be related to multi-TRP transmission and can enable higher performance.

[0165] In some embodiments, a CSI reporting configuration for CSI feedback (e.g., CQI, PMI, RI, CRI, and / or layer index (“LI”)) includes a set of channel measurement CSI resources within a CSI resource setting (e.g., CSI-ResourceConfig) channel measurement, a set of CSI-IM resources within a CSI resource setting for ZP interference measurement, and / or a set of NZP CSI-RS interference CSI resources within a CSI resource setting for NZP CSI-RS interference measurement. In various embodiments, an RRC parameter groupBasedCSIReporting (e.g., in a CSI reporting configuration) can enable and / or configure multi-TRP and / or panel CSI feedback with a CSI report including a group of N_g CSI reports or sub-CSI reports or CSI components. The set of channel measurement CSI resources can include K = NTRP NZP CSI-RS resources with NZP CSI-RS resource i associated with TRP i including a multi-port CSI-RS. Similarly, the set of CSI-IM resources can include K = NTRP CSI-IM resources with CSI-IM resource i associated with TRP i. In one example, each CSI-RS resource for channel measurement is resource-wise associated with a CSI-IM resource by ordering of the CSI-RS resources and CSI-IM resources in the corresponding resource set, where the number of CSI-RS resources for channel measurement is equal to the number of CSI-IM resources. In another example, a single CSI-IM resource can be configured with and associated with each CSI-RS resource for channel measurement (e.g., and each TRP). The NZP CSI-RS resource for channel measurement and the CSI-IM resource for interference measurement associated with TRP i can be QCLed with respect to “QCL-TypeD”. The set of interference measurement NZP CSI resources can include K = NTRP NZP CSI-RS interference IMR resources with NZP CSI-RS resource i including a multi-port interference CSI-RS associated with TRP i. The NZP CSI-RS resource for channel measurement and the NZP CSI-RS IMR resource for interference measurement associated with TRP i can be QCLed with respect to “QCL-TypeD”.

[0166] In some embodiments, a single TRP CSI report, sub-CSI report, and / or CSI component can be based on channel CSI-RS channel measurement resources (“CMRs”), CSI-IM, and / or NZP CSI-RS IMRs associated with a TRP. In various embodiments, in the case of a single CSI-IM resource, channel CMRs of other TRPs can be included as additional inter-layer interference. For joint transmission CSI reports, sub-CSI reports, and / or CSI components involving TRPs i and j, channel measurements can be based on CMRs of TRPs i and j, with interference based on associated CSI-IM and / or NZP CSI-RS IMRs associated with TRPs i and j. In certain embodiments, channel CMRs of other TRPs (e.g., not including TRPs i and j) can be included as additional inter-layer interference. In some embodiments, the number of TRPs for which a CSI report is performed can correspond to the number of NZP CSI-RS resources in a channel measurement CSI resource set. In various embodiments, the number of TRPs in a joint transmission hypothesis can be limited to 2.

[0167] In some embodiments, the terms antenna, panel, and antenna panel are used interchangeably. An antenna panel can be hardware used to transmit and / or receive radio signals at frequencies below 6 GHz (e.g., frequency range 1 (“FR1”)) or above 6 GHz (e.g., frequency range 2 (“FR2”) or millimeter wave (“mmWave”)). In certain embodiments, an antenna panel can include an array of antenna elements. Each antenna element can be connected to hardware, such as a phase shifter, that enables a control module to apply spatial parameters to the transmission and / or reception of a signal. The resulting radiation pattern can be referred to as a beam, which can or can not be unimodal and can allow a device to amplify signals transmitted or received from a spatial direction.

[0168] In various embodiments, an antenna panel can or can not be virtualized into antenna ports. An antenna panel can be connected to a baseband processing module through a radio frequency (“RF”) chain for each transmission (e.g., egress) and reception (e.g., ingress) direction. The capabilities of a device can or can not be transparent to other devices in terms of the number of antenna panels, their duplexing capabilities, their beamforming capabilities, and the like. In some embodiments, capability information can be conveyed via signaling or the capability information can be provided to a device without the need for signaling. If the information is available to other devices, the information can be used for signaling or local decision making.

[0169] In some embodiments, a UE antenna panel can be a physical or logical array of antenna elements or antenna ports that share common or important parts of a radio frequency (“RF”) chain (e.g., in-phase and / or quadrature (“I / Q”) modulators, analog-to-digital (“A / D”) converters, local oscillators, phase shift networks). A UE antenna panel or UE panel can be a logical entity with physical UE antennas mapped to the logical entity. The mapping of physical UE antennas to logical entities can depend on the UE implementation. Communicating (e.g., receiving or transmitting) on at least a subset of antenna elements or antenna ports that are actively used to radiate energy from the antenna panel (e.g., active elements) can require biasing or energizing of the RF chain, which can result in current consumption or power consumption in the UE associated with the antenna panel (e.g., including power amplifier and / or low noise amplifier (“LNA”) power consumption associated with the antenna elements or antenna ports). As used herein, the phrase “actively used to radiate energy” does not mean limited to a transmit function, but also encompasses a receive function. Thus, an antenna element actively used to radiate energy can be coupled to a transmitter to transmit radio frequency energy or coupled to a receiver to receive radio frequency energy, either simultaneously or sequentially, or generally can be coupled to a transceiver to perform its intended functionality. Communicating on active elements of an antenna panel enables generation of a radiation pattern or beam.

[0170] In certain embodiments, depending on the UE’s own implementation, a “UE panel” can have at least one of the following functionalities as an operational role of an antenna group unit that independently controls its transmit (“TX”) beam, an antenna group unit that independently controls its transmit power, and / or an antenna group unit that independently controls its transmit timing. The “UE panel” can be transparent to the gNB. For certain conditions, the gNB or network can assume that the mapping between the UE’s physical antennas and logical entities “UE panels” can not change. The conditions can include, for example, until the next update or report from the UE, or include a duration of time that the gNB assumes no change to the mapping will occur. The UE can report its UE capabilities regarding “UE panels” to the gNB or network. The UE capabilities can include at least the number of “UE panels.” In one embodiment, the UE can support UL transmission from one beam per panel. For multiple panels, more than one beam (e.g., one beam per panel) can be used for UL transmission. In another embodiment, more than one beam per panel can be supported and / or used for UL transmission.

[0171] In some embodiments, an antenna port can be defined such that the channel of a symbol transmitted on the antenna port can be inferred from the channel of another symbol transmitted on another antenna port.

[0172] In certain embodiments, two antenna ports are referred to as quasi co-located (“QCL”) if the large scale properties of the channel that conveys the symbols on one antenna port can be inferred from the channel that conveys the symbols on the other antenna port. The large scale properties can include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and / or spatial receive (“RX”) parameters. Two antenna ports can be QCL with respect to a subset of the large scale properties, and different subsets of the large scale properties can be indicated by a QCL type. For example, qcl-Type can take one of the following values: 1) “QCL-TypeA”: {Doppler shift, Doppler spread, average delay, delay spread}; 2) “QCL-TypeB”: {Doppler shift, Doppler spread}; 3) “QCL-TypeC”: {Doppler shift, average delay}; 4) “QCL-TypeD”: {spatial Rx parameters}.

[0173] In various embodiments, the spatial RX parameters can include one or more of: angle of arrival (“AoA”), dominant AoA, average AoA, angular spread, power angular spectrum (“PAS”) of AoA, average angle of departure (“AoD”), PAS of AoD, transmit and / or receive channel correlation, transmit and / or receive beamforming, and / or spatial channel correlation.

[0174] In some embodiments, an “antenna port” can be a logical port that can correspond to a beam (e.g., produced by beamforming) or can correspond to a physical antenna on a device. In certain embodiments, a physical antenna can be mapped directly to a single antenna port, where the antenna port corresponds to the actual physical antenna. In various embodiments, a set of physical antennas, a subset of physical antennas, a set of antennas, an antenna array, or an antenna subarray can be mapped to one or more antenna ports after applying complex weights and / or cyclic delays to the signal on each physical antenna. The set of physical antennas can have antennas from a single module or panel or from multiple modules or panels. The weights can be fixed as in antenna virtualization schemes such as cyclic delay diversity (“CDD”). The process for deriving an antenna port from a physical antenna can be specific to device implementation and transparent to other devices.

[0175] In various embodiments, a transmission configuration indicator (“TCI”) state associated with a target transmission can indicate a quasi co-location relationship between a target transmission (e.g., a target RS for a demodulation reference signal (“DM-RS”) port of the target transmission during a transmission occasion) and a source reference signal (e.g., a synchronization signal block (“SSB”), a channel state information reference signal (“CSI-RS”), and / or a sounding reference signal (“SRS”)) with respect to a quasi co-location type parameter indicated in the corresponding TCI state. A device can receive a configuration of multiple transmission configuration indicator states for a serving cell for transmissions on the serving cell.

[0176] In some embodiments, spatial relation information associated with a target transmission can indicate a spatial setup between the target transmission and a reference RS (e.g., an SSB, a CSI-RS, and / or an SRS). For example, a UE can transmit the target transmission with a same spatial domain filter used to receive the reference RS (e.g., a DL RS such as an SSB and / or a CSI-RS). In another example, a UE can transmit the target transmission with a same spatial domain transmission filter used to transmit the RS (e.g., an UL RS such as an SRS). A device can receive a configuration of multiple spatial relation information configurations for a serving cell for transmissions on the serving cell.

[0177] Figure 9 FIG. 9 is a flow chart illustrating one embodiment of a method 900 for channel state information reporting. In some embodiments, the method 900 is performed by an apparatus, such as the remote unit 102. In certain embodiments, the method 900 can be performed by a processor executing program code, such as a microcontroller, microprocessor, CPU, GPU, auxiliary processing unit, FPGA, etc.

[0178] In various embodiments, the method 900 includes receiving 902 channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurements, interference measurements, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points, where each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource sets for channel measurements, and at least one point of the multiple points is associated with one or more channel state information interference management resources for zero-power interference measurements. In some embodiments, the method 900 includes performing 904 channel measurements using the channel state information reference signal resource sets. In various embodiments, the method 900 includes generating 906 a set of channel state information reports based on the channel state information report configuration information.

[0179] In certain embodiments, each of the plurality of points corresponds to a transmission and reception point or a panel of a transmission and reception point. In some embodiments, the information indicating use of channel state information feedback for the plurality of points comprises: a radio resource control parameter within a channel state information report configuration; a number of channel state information reports within a channel state information report configuration; a quasi co-location relationship involving one or more channel state information reference signal resources within one or more channel state information reference signal resource sets; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration comprising at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across the plurality of points; or some combination thereof.

[0180] In various embodiments, a channel state information report in the set of channel state information reports comprises two parts, and a second part of the two parts of the channel state information report comprises two precoder matrix indicators. In one embodiment, a first precoder matrix indicator of the two precoder matrix indicators is associated with a non-zero power channel state information reference signal resource for a channel measurement resource, a non-zero power channel state information reference signal resource for an interference measurement resource, a channel state information interference management resource, or some combination thereof, and a second precoder matrix indicator of the two precoder matrix indicators is associated with a non-zero power channel state information reference signal for a channel measurement resource, a channel state information interference management, or a combination thereof.

[0181] In certain embodiments, an absolute difference between a number of layers corresponding to a first precoder matrix indicator of the two precoder matrix indicators and a number of layers corresponding to a second precoder matrix indicator of the two precoder matrix indicators is not greater than one. In some embodiments, the method 900 further comprises transmitting the set of channel state information reports in an order based on a channel state information priority function.

[0182] In various embodiments, the channel state information priority function is calculated using a formula, where a channel state information report with a lower formula value has a higher priority: Pri iCSI (y, k, c, s, h) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g• s + g, where Ng is the total number of channel state information report groups, g is an index corresponding to a value of 0 to Ng- 1, s is a channel state information configuration index, Ms is the maximum number of channel state information report configurations, c is a cell index, N cells is the number of serving cells, k is 0 for channel state information reporting of a layer 1 reference signal received power or a layer 1 signal to noise ratio or 1 otherwise, and y is 0 for aperiodic reporting, 1 for semi-persistent reporting transmitted on a physical uplink shared channel, 2 for semi-persistent reporting transmitted on a physical uplink control channel, or 3 for periodic reporting.

[0183] In one embodiment, channel state information reports of the set of channel state information reports corresponding to single point transmission have a higher priority than channel state information reports of the set of channel state information reports corresponding to joint transmission from multiple points. In certain embodiments, channel state information that is common to a subset of two or more channel state information reports in the set of channel state information reports is reported in one of the subset of two or more channel state information reports. In some embodiments, the common channel state information includes information that is common to all layers.

[0184] In various embodiments, at least one channel state information report of the set of channel state information reports includes channel state information corresponding to a Type II codebook, and the at least one channel state information report includes at least one bitmap indicating beams having non-zero coefficients included in the at least one channel state information report. In one embodiment, a channel state information report of the set of channel state information reports includes a plurality of channel quality indicators.

[0185] In certain embodiments, a value corresponding to at least one channel quality indicator of the plurality of channel quality indicators is computed in a differential manner relative to a value corresponding to another channel quality indicator of the plurality of channel quality indicators. In some embodiments, the at least one channel quality indicator computed in a differential manner is configured with a channel quality indicator format indicator corresponding to a differential channel quality indicator format.

[0186] Figure 10 is a flow chart illustrating another embodiment of a method 1000 for channel state information reporting. In some embodiments, the method 1000 is performed by an apparatus, such as the remote unit 102. In certain embodiments, the method 1000 can be performed by a processor executing program code, such as a microcontroller, microprocessor, CPU, GPU, auxiliary processing unit, FPGA, etc.

[0187] In various embodiments, the method 1000 includes receiving 1002 channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information channel state information reference signal resource configurations associated with a set of channel state information channel state information reference signal resources for channel measurement and a set of channel state information interference management resources for interference measurement; and information indicating use of channel state information feedback corresponding to multiple points, where each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of the set of channel state information channel state information reference signal resources for channel measurement and the multiple points are associated with one or more channel state information interference management resources of the set of channel state information interference management resources for interference measurement. In some embodiments, the method 1000 includes generating 1004 a set of channel state information reports based on the channel state information report configuration information, where each channel state information report of the set of channel state information reports includes two parts. In various embodiments, the method 1000 includes reporting 1006 the set of channel state information reports to the network.

[0188] In certain embodiments, each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point. In some embodiments, the information indicating use of channel state information feedback for the multiple points includes: a radio resource control parameter within the channel state information report configuration; a number of channel state information reports within the channel state information report configuration; a quasi co-location relationship involving one or more channel state information reference signal resources within the set of channel state information reference signal resources; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration including at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across the multiple points; or some combination thereof. In various embodiments, each point of the multiple points is associated with a channel state information interference management resource for interference measurement.

[0189] In one embodiment, each channel state information reference signal resource for channel measurement is resource-wise associated with a channel state information interference management resource by an ordering of channel state information reference signal resources and channel state information interference management resources in a corresponding resource set, and a number of channel state information reference signal resources for channel measurement is equal to a number of channel state information interference management resources. In certain embodiments, a non-zero-power channel state information reference signal resource for channel measurement and a channel state information interference management resource for interference measurement associated with a same point are quasi co-located with respect to “QCL-TypeD.” In some embodiments, the multiple points are associated with at least one non-zero-power channel state information reference signal resource for interference measurement.

[0190] In various embodiments, the set of channel state information reports includes two subsets of channel state information reports, a first of the two subsets of channel state information reports includes at least one channel state information report corresponding to a single point transmission, and a second of the two subsets of channel state information reports includes at least one channel state information report corresponding to a joint transmission from multiple points. In one embodiment, a partition of channel state information that is the same for two channel state information reports of different subsets of the two subsets of channel state information reports is reported in one of the two channel state information reports associated with the different subsets of the two subsets of channel state information reports.

[0191] In certain embodiments, one or more channel state information reports of the set of channel state information reports are identified. In some embodiments, the one or more channel state information reports of the subset of channel state information reports are identified based on: a network configuration; an identification of the channel state information reports; user equipment feedback; a function of rank indicators of the one or more channel state information reports; a function of channel quality indicators of the one or more channel state information reports; or some combination thereof. In various embodiments, the one or more channel state information reports of the subset of channel state information reports are reported in part.

[0192] In one embodiment, a first of two portions of the one or more channel state information reports of the subset of channel state information reports is reported and a second of the two portions of the one or more channel state information reports of the subset of channel state information reports is not reported. In certain embodiments, a first of the first of the two portions and the second of the two portions of the one or more channel state information reports of the subset of channel state information reports is reported and a last of the second of the two portions of the one or more channel state information reports of the subset of channel state information reports is not reported. In some embodiments, the one or more channel state information reports of the subset of channel state information reports are not reported.

[0193] Figure 11 FIG. 11 is a flow chart illustrating yet another embodiment of a method 1100 for channel state information reporting. In some embodiments, the method 1100 is performed by an apparatus, such as the remote unit 102. In certain embodiments, the method 1100 can be performed by a processor executing program code, such as a microcontroller, microprocessor, CPU, GPU, auxiliary processing unit, FPGA, etc.

[0194] In various embodiments, the method 1100 includes receiving 1102 channel state information report configuration information, where the channel state information report configuration information includes: information indicating one or more channel state information-reference signal resource configurations associated with at least one non-zero-power channel state information reference signal resource set for channel measurement; and information indicating use of channel state information report configuration corresponding to multiple points, where the multiple points are associated with a primary group of points or a secondary group of points. In some embodiments, the method 1100 includes performing 1104 channel measurement using the at least one non-zero-power channel state information reference signal resource set. In various embodiments, the method 1100 includes generating 1106 a set of channel state information reports based on the channel state information report configuration information.

[0195] In certain embodiments, each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point. In some embodiments, the information indicating use of channel state information feedback for the multiple points includes: a radio resource control parameter within the channel state information report configuration; a number of channel state information reports within the channel state information report configuration; a quasi co-location relationship involving one or more channel state information reference signal resources within the at least one channel state information reference signal resource set; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration including at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across multiple points; or some combination thereof.

[0196] In various embodiments, the primary group of points includes one point and the secondary group of points includes at least one point. In one embodiment, joint transmission from two points corresponds to a primary point and a secondary point of the primary group of points and the secondary group of points. In certain embodiments, the primary point is associated with a non-zero-power channel state information reference signal resource for channel measurement that is quasi co-located with a physical downlink control channel.

[0197] In some embodiments, a rank indicator value carried in a channel state information report corresponding to secondary point channel state information feedback is no more than two. In various embodiments, each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of a channel state information reference signal resource set for channel measurement. In one embodiment, the one or more non-zero-power channel state information reference signal resources for interference measurement are quasi co-located with the non-zero-power channel state information reference signal resources for channel measurement.

[0198] In certain embodiments, the method 1100 further includes transmitting the set of channel state information reports in an order based on a channel state information priority function, where the channel state information priority function is calculated using a formula where a channel state information report with a lower formula value has a higher priority: iCSI (y, k, c, s, g) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g · s + g, where N g is a total number of channel state information report groups, g is an index corresponding to a value 0 to N g - 1, s is a channel state information configuration index, M s is a maximum number of channel state information report configurations, c is a cell index, N cells is a number of serving cells, k is 0 for channel state information reports carrying layer 1 reference signal received power or layer 1 signal to noise ratio, and 1 otherwise, and y is 0 for aperiodic reports, 1 for semi-persistent reports transmitted on a physical uplink shared channel, 2 for semi-persistent reports transmitted on a physical uplink control channel, or 3 for periodic reports.

[0199] In some embodiments, channel state information reports of the set of channel state information reports corresponding to single point transmissions have a higher priority than channel state information reports of the set of channel state information reports corresponding to joint transmissions from multiple points. In various embodiments, channel state information reports corresponding to single point transmissions from a primary point have a higher priority than channel state information reports in the set of channel state information reports.

[0200] In one embodiment, a method includes receiving channel state information reporting configuration information, where the channel state information reporting configuration information includes: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points, where each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource sets for channel measurement, and at least one point of the multiple points is associated with one or more channel state information interference management resources for zero-power interference measurement; performing channel measurement using the channel state information reference signal resource sets; and generating a set of channel state information reports based on the channel state information reporting configuration information.

[0201] In certain embodiments, each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point.

[0202] In some embodiments, the information indicating use of channel state information feedback for the multiple points includes: a radio resource control parameter within the channel state information reporting configuration; a number of channel state information reports within the channel state information reporting configuration; a quasi-co-location relationship involving one or more channel state information reference signal resources within the one or more channel state information reference signal resource sets; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration including at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across the multiple points; or some combination thereof.

[0203] In various embodiments, a channel state information report of the set of channel state information reports includes two parts, and a second part of the two parts of the channel state information report includes two precoder matrix indicators.

[0204] In one embodiment, a first precoder matrix indicator of the two precoder matrix indicators is associated with a non-zero-power channel state information reference signal resource for a channel measurement resource, a non-zero-power channel state information reference signal resource for an interference measurement resource, a channel state information interference management resource, or some combination thereof, and a second precoder matrix indicator of the two precoder matrix indicators is associated with a non-zero-power channel state information reference signal for a channel measurement resource, a channel state information interference management, or a combination thereof.

[0205] In certain embodiments, an absolute difference between a number of layers corresponding to a first precoder matrix indicator of the two precoder matrix indicators and a number of layers corresponding to a second precoder matrix indicator of the two precoder matrix indicators is not greater than one.

[0206] In some embodiments, the method further comprises transmitting the set of channel state information reports in an order based on a channel state information priority function.

[0207] In various embodiments, the channel state information priority function is calculated using a formula, where a channel state information report with a lower formula value has a higher priority: Pri iCSI (y, k, c, s, g) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g · s + g, where N g is a total number of channel state information report groups, g is an index corresponding to a value 0 to N g - 1, s is a channel state information configuration index, M s is a maximum number of channel state information report configurations, c is a cell index, N cells is a number of serving cells, k is 0 for a channel state information report carrying a layer 1 reference signal received power or a layer 1 signal to noise ratio, and 1 otherwise, and y is 0 for an aperiodic report, 1 for a semi-persistent report transmitted on a physical uplink shared channel, 2 for a semi-persistent report transmitted on a physical uplink control channel, or 3 for a periodic report.

[0208] In one embodiment, channel state information reports of the set of channel state information reports corresponding to single point transmissions have a higher priority than channel state information reports of the set of channel state information reports corresponding to joint transmissions from multiple points.

[0209] In certain embodiments, channel state information that is common to a subset of two or more channel state information reports in the set of channel state information reports is reported in one channel state information report of the subset of two or more channel state information reports.

[0210] In some embodiments, the common channel state information includes information that is common to all layers.

[0211] In various embodiments, at least one channel state information report of the set of channel state information reports includes channel state information corresponding to a type II codebook, and the at least one channel state information report includes at least one bitmap indicating beams with non-zero coefficients included in the at least one channel state information report.

[0212] In one embodiment, the channel state information reports in the set of channel state information reports include a plurality of channel quality indicators.

[0213] In certain embodiments, a value corresponding to at least one channel quality indicator of the plurality of channel quality indicators is computed in a differential manner relative to a value corresponding to another channel quality indicator of the plurality of channel quality indicators.

[0214] In some embodiments, the at least one channel quality indicator computed in a differential manner is configured with a channel quality indicator format indicator corresponding to a differential channel quality indicator format.

[0215] In one embodiment, an apparatus comprises a receiver configured to receive channel state information report configuration information, wherein the channel state information report configuration information includes information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof, and information indicating use of channel state information feedback corresponding to a plurality of points, wherein each point of the plurality of points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource sets for channel measurement, and at least one point of the plurality of points is associated with one or more channel state information interference management resources for zero-power interference measurement; and a processor configured to perform channel measurement using the channel state information reference signal resource sets, and generate a set of channel state information reports based on the channel state information report configuration information, wherein each point of the plurality of points corresponds to a transmission and reception point or a panel of a transmission and reception point, and wherein the information indicating use of channel state information feedback for the plurality of points includes a radio resource control parameter within the channel state information report configuration, a number of channel state information reports within the channel state information report configuration, a quasi-co-location relationship involving one or more channel state information reference signal resources within the one or more channel state information reference signal resource sets, a codepoint indicating different downlink control information states, a codebook type parameter, a codebook configuration parameter, a transmission configuration indicator codepoint from a transmission configuration including at least two transmission configuration indicator states, an indication of a spatial division multiplexing scheme across the plurality of points, or some combination thereof.

[0216] In certain embodiments, a channel state information report in the set of channel state information reports includes two parts, and a second part of the two parts of the channel state information report includes two precoder matrix indicators, a first precoder matrix indicator of the two precoder matrix indicators is associated with a non-zero power channel state information reference signal resource for a channel measurement resource, a non-zero power channel state information reference signal resource for an interference measurement resource, a channel state information interference management resource, or some combination thereof, and a second precoder matrix indicator of the two precoder matrix indicators is associated with a non-zero power channel state information reference signal for a channel measurement resource, a channel state information interference management, or a combination thereof, and an absolute difference between a number of layers corresponding to the first precoder matrix indicator of the two precoder matrix indicators and a number of layers corresponding to the second precoder matrix indicator of the two precoder matrix indicators is not greater than one.

[0217] In some embodiments, the apparatus further includes a transmitter that transmits the set of channel state information reports in an order based on a channel state information priority function, wherein a channel state information report of the set of channel state information reports corresponding to a single point transmission has a higher priority than a channel state information report of the set of channel state information reports corresponding to a joint transmission from multiple points, and the channel state information priority function is calculated using a formula, wherein a channel state information report with a lower formula value has a higher priority: Pri iCSI (y, k, c, s, g) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g · s + g, where N g is a total number of channel state information report groups, g is an index corresponding to a value 0 to N g - 1, s is a channel state information configuration index, M s is a maximum number of channel state information report configurations, c is a cell index, N cells is a number of serving cells, k is 0 for a channel state information report bearing a layer 1 reference signal received power or a layer 1 signal to noise ratio, and 1 otherwise, and y is 0 for an aperiodic report, 1 for a semi-persistent report transmitted on a physical uplink shared channel, 2 for a semi-persistent report transmitted on a physical uplink control channel, or 3 for a periodic report.

[0218] In various embodiments, a channel state information is reported in one channel state information report of a subset of two or more channel state information reports in a channel state information report set that is common to the subset of two or more channel state information reports.

[0219] In one embodiment, at least one channel state information report of a channel state information report set includes channel state information corresponding to a Type-II codebook, and the at least one channel state information report includes at least one bitmap indicating beams with non-zero coefficients included in the at least one channel state information report, a channel state information report of the channel state information report set includes a plurality of channel quality indicators, a value corresponding to at least one channel quality indicator of the plurality of channel quality indicators is computed in a differential manner with respect to a value corresponding to another channel quality indicator of the plurality of channel quality indicators, and the at least one channel quality indicator computed in the differential manner is configured with a channel quality indicator format indicator corresponding to a differential channel quality indicator format.

[0220] In one embodiment, a method includes receiving channel state information report configuration information, wherein the channel state information report configuration information includes: information indicating one or more channel state information channel state information reference signal resource configurations associated with a channel state information channel state information reference signal resource set for channel measurement and a channel state information interference management resource set for interference measurement; and information indicating use of channel state information feedback corresponding to multiple points, wherein each point of the multiple points is associated with a non-zero-power channel state information reference signal resource of the channel state information reference signal resource set for channel measurement, and the multiple points are associated with one or more channel state information interference management resources of the channel state information interference management resource set for interference measurement; generating a channel state information report set based on the channel state information report configuration information, wherein each channel state information report of the channel state information report set includes two parts; and reporting the channel state information report set to a network.

[0221] In certain embodiments, each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point.

[0222] In some embodiments, the information indicating use of channel state information feedback for multiple points comprises: a radio resource control parameter within a channel state information report configuration; a channel state information report quantity within a channel state information report configuration; a quasi co-location relationship involving one or more channel state information reference signal resources within a channel state information reference signal resource set; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration comprising at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across multiple points; or some combination thereof.

[0223] In various embodiments, each point of the multiple points is associated with a channel state information interference management resource for interference measurement.

[0224] In one embodiment, each channel state information reference signal resource for channel measurement is resource-wise associated with a channel state information interference management resource by an ordering of channel state information reference signal resources and channel state information interference management resources in a corresponding resource set, and a quantity of channel state information reference signal resources for channel measurement is equal to a quantity of channel state information interference management resources.

[0225] In certain embodiments, a non-zero power channel state information reference signal resource for channel measurement and a channel state information interference management resource for interference measurement associated with a same point are quasi co-located with respect to “QCL-TypeD”.

[0226] In some embodiments, the multiple points are associated with at least one non-zero power channel state information reference signal resource for interference measurement.

[0227] In various embodiments, a channel state information report set comprises two subsets of channel state information reports, a first of the two subsets of channel state information reports comprises at least one channel state information report corresponding to a single point transmission, and a second of the two subsets of channel state information reports comprises at least one channel state information report corresponding to a joint transmission from multiple points.

[0228] In one embodiment, a partition of channel state information is reported in one of two channel state information reports associated with different subsets of the two subsets of channel state information reports that is the same for both of the two channel state information reports.

[0229] In certain embodiments, a subset of one or more channel state information reports of a channel state information report set is identified.

[0230] In some embodiments, the one or more channel state information reports of the subset of channel state information reports are identified based on: network configuration; an identification of the channel state information reports; user equipment feedback; a function of rank indicators of the one or more channel state information reports; a function of channel quality indicators of the one or more channel state information reports; or some combination thereof.

[0231] In various embodiments, the one or more channel state information reports of the subset of channel state information reports are reported in part.

[0232] In one embodiment, a first portion of the two portions of the one or more channel state information reports of the subset of channel state information reports is reported and a second portion of the two portions of the one or more channel state information reports of the subset of channel state information reports is not reported.

[0233] In certain embodiments, a first portion of the first portion and the second portion of the two portions of the one or more channel state information reports of the subset of channel state information reports is reported and a last portion of the second portion of the two portions of the one or more channel state information reports of the subset of channel state information reports is not reported.

[0234] In some embodiments, the one or more channel state information reports of the subset of channel state information reports are not reported.

[0235] In one embodiment, an apparatus comprises: a receiver configured to receive channel state information report configuration information, wherein the channel state information report configuration information comprises: information indicating one or more channel state information channel state information reference signal resource configurations associated with a set of channel state information channel state information reference signal resources for channel measurement and a set of channel state information interference management resources for interference measurement; and information indicating use of channel state information feedback corresponding to a plurality of points, wherein each point of the plurality of points is associated with a non-zero power channel state information reference signal resource of the set of channel state information reference signal resources for channel measurement, the plurality of points is associated with one or more channel state information interference management resources of the set of channel state information interference management resources for interference measurement, and each point of the plurality of points corresponds to a transmission and reception point or a panel of a transmission and reception point; and a processor configured to: generate a set of channel state information reports based on the channel state information report configuration information, wherein each channel state information report of the set of channel state information reports comprises two portions; and report the set of channel state information reports to a network.

[0236] In certain embodiments, the information indicating use of channel state information feedback for multiple points comprises: a radio resource control parameter within a channel state information report configuration; a channel state information report quantity within a channel state information report configuration; a quasi co-location relationship involving one or more channel state information reference signal resources within a channel state information reference signal resource set; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration comprising at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across multiple points; or some combination thereof.

[0237] In some embodiments, each point of the multiple points is associated with a channel state information interference management resource for interference measurement, and each channel state information reference signal resource for channel measurement is resource-wise associated with a channel state information interference management resource by an ordering of channel state information reference signal resources and channel state information interference management resources in a corresponding resource set, a number of channel state information reference signal resources for channel measurement is equal to a number of channel state information interference management resources, and a non-zero-power channel state information reference signal resource for channel measurement and a channel state information interference management resource for interference measurement associated with a same point are quasi co-located with respect to “QCL-TypeD”.

[0238] In various embodiments, a channel state information report set comprises two subsets of channel state information reports, a first of the two subsets of channel state information reports comprises at least one channel state information report corresponding to a single-point transmission, a second of the two subsets of channel state information reports comprises at least one channel state information report corresponding to a joint transmission from multiple points, and a partition of channel state information that is the same for two channel state information reports of the two subsets of channel state information reports is reported in one of the two channel state information reports associated with different subsets of the two subsets of channel state information reports.

[0239] In one embodiment, a subset of one or more channel state information reports of a set of channel state information reports is identified, and the one or more channel state information reports of the subset of channel state information reports is identified based on: network configuration; an identity of the channel state information reports; user equipment feedback; a function of rank indicators of the one or more channel state information reports; a function of channel quality indicators of the one or more channel state information reports; or some combination thereof, wherein a portion of the one or more channel state information reports of the subset of channel state information reports is reported, and the one or more channel state information reports of the subset of channel state information reports is not reported, and wherein: a first of two portions of the one or more channel state information reports of the subset of channel state information reports is reported, and a second of the two portions of the one or more channel state information reports of the subset of channel state information reports is not reported; or a first of the first of the two portions of the one or more channel state information reports of the subset of channel state information reports is reported, and a last of the second of the two portions of the one or more channel state information reports of the subset of channel state information reports is not reported.

[0240] In one embodiment, a method comprises: receiving channel state information report configuration information, wherein the channel state information report configuration information comprises: information indicating one or more channel state information-reference signal resource configurations associated with at least one non-zero-power channel state information reference signal resource set for channel measurement; and information indicating use of channel state information report configuration corresponding to multiple points, wherein the multiple points are associated with a primary group of points or a secondary group of points; performing channel measurement using the at least one non-zero-power channel state information reference signal resource set; and generating a set of channel state information reports based on the channel state information report configuration information.

[0241] In certain embodiments, each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point.

[0242] In some embodiments, the information indicating use of channel state information feedback for the multiple points comprises: a radio resource control parameter within the channel state information report configuration; a number of channel state information reports within the channel state information report configuration; a quasi-co-location relationship involving one or more channel state information reference signal resources within the at least one channel state information reference signal resource set; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration comprising at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across the multiple points; or some combination thereof.

[0243] In various embodiments, the primary group of points includes one point and the secondary group of points includes at least one point.

[0244] In one embodiment, the joint transmission from the two points corresponds to a primary point and a secondary point of the primary group of points and the secondary group of points.

[0245] In certain embodiments, the primary point is associated with a non-zero power channel state information reference signal resource for channel measurement that is quasi co-located with the physical downlink control channel.

[0246] In some embodiments, a rank indicator value carried in a channel state information report corresponding to the secondary point channel state information feedback is no more than two.

[0247] In various embodiments, each point of the plurality of points is associated with a non-zero power channel state information reference signal resource of a set of channel state information reference signal resources for channel measurement.

[0248] In one embodiment, the one or more non-zero power channel state information reference signal resources for interference measurement are quasi co-located with the non-zero power channel state information reference signal resources for channel measurement.

[0249] In certain embodiments, the method further comprises transmitting the set of channel state information reports in an order based on a channel state information priority function, wherein the channel state information priority function is calculated using the formula Pri iCSI (y, k, c, s, g) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g · s + g, where N g is the total number of channel state information report groups, g is an index corresponding to the values 0 to N g - 1, s is a channel state information configuration index, M s is the maximum number of channel state information report configurations, c is a cell index, N cells is the number of serving cells, k is 0 for channel state information reports carrying layer 1 reference signal received power or layer 1 signal to noise ratio, and 1 otherwise, and y is 0 for aperiodic reports, 1 for semi-persistent reports transmitted on a physical uplink shared channel, 2 for semi-persistent reports transmitted on a physical uplink control channel, or 3 for periodic reports.

[0250] In some embodiments, the channel state information reports of the set of channel state information reports corresponding to single-point transmissions have a higher priority than the channel state information reports of the set of channel state information reports corresponding to joint transmissions from multiple points.

[0251] In various embodiments, the channel state information reports corresponding to single-point transmissions from a primary point have a higher priority than the channel state information reports in the set of channel state information reports.

[0252] In one embodiment, an apparatus comprises a receiver configured to receive channel state information report configuration information, wherein the channel state information report configuration information comprises information indicating one or more channel state information-reference signal resource configurations associated with at least one non-zero-power channel state information reference signal resource set for channel measurement, and information indicating use of channel state information reporting configurations corresponding to multiple points, wherein the multiple points are associated with a primary group of points or a secondary group of points, and a processor configured to perform channel measurement using the at least one non-zero-power channel state information reference signal resource set, and generate a set of channel state information reports based on the channel state information report configuration information.

[0253] In certain embodiments, each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point.

[0254] In some embodiments, the information indicating use of channel state information feedback for the multiple points comprises a radio resource control parameter within the channel state information report configuration, a number of channel state information reports within the channel state information report configuration, a quasi-co-location relationship involving one or more channel state information reference signal resources within the at least one channel state information reference signal resource set, a codepoint indicating different downlink control information states, a codebook type parameter, a codebook configuration parameter, a transmission configuration indicator codepoint from a transmission configuration comprising at least two transmission configuration indicator states, an indication of a spatial division multiplexing scheme across the multiple points, or some combination thereof.

[0255] In various embodiments, the primary group of points comprises one point and the secondary group of points comprises at least one point.

[0256] In one embodiment, the joint transmission from two points corresponds to a primary point and a secondary point in the primary group of points and the secondary group of points, the primary point is associated with a non-zero-power channel state information reference signal resource for channel measurement that is quasi co-located with a physical downlink control channel, and a rank indicator value carried in a channel state information report corresponding to channel state information feedback for the secondary point does not exceed two.

[0257] In certain embodiments, each of the plurality of points is associated with a non-zero power channel state information reference signal resource of the channel state information reference signal resource set for channel measurement, and one or more non-zero power channel state information reference signal resources for interference measurement are quasi co-located with the non-zero power channel state information reference signal resources for channel measurement.

[0258] In some embodiments, the apparatus further includes a transmitter that transmits the set of channel state information reports in an order based on a channel state information priority function, where the channel state information priority function is calculated using the formula where a channel state information report with a lower formula value has a higher priority: iCSI (y, k, c, s, g) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g · s + g, where N g is a total number of channel state information report groups, g is an index corresponding to a value 0 to N g - 1, s is a channel state information configuration index, M s is a maximum number of channel state information report configurations, c is a cell index, N cells is a number of serving cells, k is 0 for a channel state information report carrying a layer 1 reference signal received power or a layer 1 signal to noise ratio, and 1 otherwise, and y is 0 for an aperiodic report, 1 for a semi-persistent report transmitted on a physical uplink shared channel, 2 for a semi-persistent report transmitted on a physical uplink control channel, or 3 for a periodic report.

[0259] In various embodiments, channel state information reports of the set of channel state information reports corresponding to single point transmissions have a higher priority than channel state information reports of the set of channel state information reports corresponding to joint transmissions from multiple points, and channel state information reports corresponding to single point transmissions from a primary point have a higher priority than channel state information reports in the set of channel state information reports.

[0260] Embodiments can be practiced in other specific forms. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the application is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A method performed by a user equipment (UE), comprising: receiving channel state information reporting configuration information, wherein the channel state information reporting configuration information comprises: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points, wherein each of the multiple points is associated with a non-zero power channel state information reference signal resource of a channel state information reference signal resource set for channel measurement and at least one of the multiple points is associated with one or more channel state information interference management resources for zero power interference measurement; performing channel measurement using the channel state information reference signal resource sets; and generating a set of channel state information reports based on the channel state information reporting configuration information, wherein a channel state information report in the set of channel state information reports comprises two parts, and one of the two parts of the channel state information report comprises a first precoder matrix indicator and a second precoder matrix indicator, wherein the first precoder matrix indicator is associated with a non-zero power channel state information reference signal resource for a channel measurement resource, a non-zero power channel state information reference signal resource for an interference measurement resource, a channel state information interference management resource, or some combination thereof, and the second precoder matrix indicator is associated with a non-zero power channel state information reference signal for a channel measurement resource, a channel state information interference management, or a combination thereof.

2. The method of claim 1, wherein, each of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point.

3. The method of claim 1, wherein, the information indicating use of channel state information feedback for multiple points comprises: a radio resource control parameter within the channel state information reporting configuration; a number of channel state information reports within the channel state information reporting configuration; a quasi co-location relationship involving one or more channel state information reference signal resources within the one or more channel state information reference signal resource sets; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration comprising at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across multiple points; or some combination thereof.

4. The method of claim 1, wherein, an absolute difference between a number of layers corresponding to a first precoder matrix indicator of the two precoder matrix indicators and a number of layers corresponding to a second precoder matrix indicator of the two precoder matrix indicators is not greater than one.

5. The method of claim 1, further comprising transmitting the set of channel state information reports in an order based on a channel state information priority function, wherein a channel state information report with a lower value of the channel state information priority function has a higher priority:

6. The method of claim 5, wherein, ​ Pri iCSI (y, k, c, s, g) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g · s + g, where N g is the total number of channel state information report groups, g is an index corresponding to a value 0 to N g -1, s is a channel state information configuration index, M s is the maximum number of channel state information report configurations, c is a cell index, N cells is the number of serving cells, k is 0 for channel state information reports carrying layer 1 reference signal received power or layer 1 signal to noise ratio, and 1 otherwise, and y is 0 for aperiodic reports, 1 for semi-persistent reports transmitted on a physical uplink shared channel, 2 for semi-persistent reports transmitted on a physical uplink control channel, or 3 for periodic reports.

7. The method of claim 5, wherein, A channel state information report of the set of channel state information reports corresponding to single-point transmission has a higher priority than a channel state information report of the set of channel state information reports corresponding to joint transmission from multiple points.

8. The method of claim 1, wherein, reporting channel state information common to a subset of two or more channel state information reports in the set of channel state information reports in one channel state information report of the subset.

9. The method of claim 8, wherein, The common channel state information includes information common to all layers.

10. The method of claim 1, wherein, At least one channel state information report of the set of channel state information reports includes channel state information corresponding to a Type-II codebook, and the at least one channel state information report includes at least one bitmap indicating beams with non-zero coefficients included in the at least one channel state information report.

11. The method of claim 1, wherein, A channel state information report of the set of channel state information reports includes a plurality of channel quality indicators.

12. The method of claim 11, wherein, A value corresponding to at least one channel quality indicator of the plurality of channel quality indicators is computed in a differential manner with respect to a value corresponding to another channel quality indicator of the plurality of channel quality indicators.

13. The method of claim 12, wherein, The at least one channel quality indicator computed in a differential manner is configured with a channel quality indicator format indicator corresponding to a differential channel quality indicator format.

14. A user equipment (UE), comprising: a receiver configured to receive channel state information report configuration information, wherein the channel state information report configuration information comprises: information indicating one or more channel state information reference signal resource configurations associated with one or more channel state information reference signal resource sets for channel measurement, interference measurement, or a combination thereof; and information indicating use of channel state information feedback corresponding to multiple points, wherein each point of the multiple points is associated with a non-zero power channel state information reference signal resource of a channel state information reference signal resource set for channel measurement, and at least one point of the multiple points is associated with one or more channel state information interference management resources for zero power interference measurement; and a processor configured to: perform channel measurement using the channel state information reference signal resource sets; and generate a set of channel state information reports based on the channel state information report configuration information, wherein each point of the multiple points corresponds to a transmission and reception point or a panel of a transmission and reception point, and wherein the information indicating use of channel state information feedback for multiple points comprises: a radio resource control parameter within the channel state information report configuration; a number of channel state information reports within the channel state information report configuration; a quasi co-location relationship involving one or more channel state information reference signal resources within the one or more channel state information reference signal resource sets; a codepoint indicating different downlink control information states; a codebook type parameter; a codebook configuration parameter; a transmission configuration indicator codepoint from a transmission configuration comprising at least two transmission configuration indicator states; an indication of a spatial division multiplexing scheme across multiple points; or a codepoint indicating different downlink control information states. some combinations thereof, wherein a channel state information report in the set of channel state information reports includes two parts, and one of the two parts of the channel state information report includes a first precoder matrix indicator and a second precoder matrix indicator, wherein the first precoder matrix indicator is associated with a non-zero power channel state information reference signal resource for a channel measurement resource, a non-zero power channel state information reference signal resource for an interference measurement resource, a channel state information interference management resource, or some combination thereof, and the second precoder matrix indicator is associated with a non-zero power channel state information reference signal for a channel measurement resource, a channel state information interference management, or a combination thereof.

15. The UE of claim 14, wherein, an absolute difference between a number of layers corresponding to a first precoder matrix indicator of the two precoder matrix indicators and a number of layers corresponding to a second precoder matrix indicator of the two precoder matrix indicators is not greater than one.

16. The UE of claim 14, further comprising a transmitter to transmit the set of channel state information reports in an order based on a channel state information priority function, wherein, a channel state information report of the set of channel state information reports corresponding to a single point transmission has a higher priority than a channel state information report of the set of channel state information reports corresponding to a joint transmission from multiple points, and the channel state information priority function is calculated using a formula, wherein a channel state information report having a lower formula value has a higher priority: Pri iCSI (y, k, c, s, g) = 2 · N cells · M s · N g · y + N cells · M s · N g · k + M s · N g · c + N g · s + g, where N g is the total number of channel state information report groups, g is an index corresponding to a value 0 to N g -1, s is a channel state information configuration index, M s is the maximum number of channel state information report configurations, c is a cell index, N cells is the number of serving cells, k is 0 for channel state information reports carrying layer 1 reference signal received power or layer 1 signal to noise ratio, and 1 otherwise, and y is 0 for aperiodic reports, 1 for semi-persistent reports transmitted on a physical uplink shared channel, 2 for semi-persistent reports transmitted on a physical uplink control channel, or 3 for periodic reports.

17. The UE of claim 14, wherein, reporting channel state information common to a subset of two or more channel state information reports in the set of channel state information reports in one channel state information report of the subset of two or more channel state information reports.

18. The UE of claim 14, wherein, a channel state information report in the set of channel state information reports includes a plurality of channel quality indicators, a value corresponding to at least one channel quality indicator of the plurality of channel quality indicators is computed in a differential manner with respect to a value corresponding to another channel quality indicator of the plurality of channel quality indicators, and the at least one channel quality indicator computed in a differential manner is configured with a channel quality indicator format indicator corresponding to a differential channel quality indicator format.

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