CHANNEL STATE INFORMATION REPORT CONFIGURATION
Apparatuses, methods, and systems are disclosed for CSI report configuration. One method includes receiving at least one CSI reporting setting. The at least one CSI reporting setting includes at least one CSI RS resource setting, and the CSI reporting setting includes an indication of CSI feedback reporting for multiple transmission points in a mobile communication network. The method includes identifying a set of transmission hypotheses based on the CSI reporting setting. The hypotheses include a combination of single-point transmission from at least one TRP, or multi-point joint transmission from two TRPs. The method includes receiving at least one CSI reference signal resource transmitted from the mobile communication network based on the CSI reference signal resource setting. The method includes generating a set of at least one CSI report based on the CSI reporting setting.
This application claims priority to U.S. Patent Application Ser. No. 63/108,251 entitled “APPARATUSES, METHODS, AND SYSTEMS FOR CSI ENHANCEMENTS FOR MULTI-TRP WITH CONFINED CONFIGURATION AND REPORTING” and filed on Oct. 30, 2020 for Ahmed Monier Ibrahim Saleh Hindy and U.S. Patent Application Ser. No. 63/117,444 entitled “CSI ENHANCEMENTS FOR MULTI-TRP” and filed on Nov. 23, 2020 for Ahmed Monier Ibrahim Saleh Hindy, all of which are incorporated herein by reference their its entirety.
FIELDThe subject matter disclosed herein relates generally to wireless communications and more particularly relates to channel state information report configuration.
BACKGROUNDIn certain wireless communications networks, there may be multiple TRPs. In such networks, there may be inefficient and/or excessive communications.
BRIEF SUMMARYMethods for channel state information report configuration are disclosed. Apparatuses and systems also perform the functions of the methods. One embodiment of a method includes receiving, at a user equipment, at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. In some embodiments, the method includes identifying a set of transmission hypotheses based on the channel state information reporting setting. The hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. In certain embodiments, the method includes receiving at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. In various embodiments, the method includes generating a set of at least one channel state information report based on the channel state information reporting setting. The at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In some embodiments, the method includes feeding back the set of the at least one channel state information report to the mobile communication network.
One apparatus for channel state information report configuration includes a user equipment. In some embodiments, the apparatus includes a receiver that receives at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. In various embodiments, the apparatus includes a processor that identifies a set of transmission hypotheses based on the channel state information reporting setting. The hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. In certain embodiments, the apparatus includes a transmitter. The receiver receives at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. The processor generates a set of at least one channel state information report based on the channel state information reporting setting. The at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. The transmitter feeds back the set of the at least one channel state information report to the mobile communication network.
Another embodiment of a method for channel state information report configuration includes transmitting, from a network device, at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. A set of transmission hypotheses is identified based on the channel state information reporting setting, the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. In some embodiments, the method includes transmitting at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. A set of at least one channel state information report is generated based on the channel state information reporting setting, the at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In certain embodiments, the method includes receiving feedback including the set of the at least one channel state information report to the mobile communication network.
Another apparatus for channel state information report configuration includes a network device. In some embodiments, the apparatus includes a transmitter that: transmits at least one channel state information reporting setting, wherein the at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network, wherein a set of transmission hypotheses is identified based on the channel state information reporting setting, the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points; and transmits at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. A set of at least one channel state information report is generated based on the channel state information reporting setting, the at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In various embodiments, the apparatus includes a receiver that receives feedback including the set of the at least one channel state information report to the mobile communication network.
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 scope, the embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which:
As will be appreciated by one skilled in the art, aspects of the embodiments may be embodied as a system, apparatus, method, or program product. Accordingly, embodiments may 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 may all generally be referred to herein as a “circuit,” “module” or “system.” Furthermore, embodiments may take the form of a program product embodied in one or more computer readable storage devices storing machine readable code, computer readable code, and/or program code, referred hereafter as code. The storage devices may be tangible, non-transitory, and/or non-transmission. The storage devices may not embody signals. In a certain embodiment, the storage devices only employ signals for accessing code.
Certain of the functional units described in this specification may be labeled as modules, in order to more particularly emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising custom very-large-scale integration (“VLSI”) circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
Modules may 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 may include disparate instructions stored in different locations which, when joined logically together, include the module and achieve the stated purpose for the module.
Indeed, a module of code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Similarly, operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may 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 portions are stored on one or more computer readable storage devices.
Any combination of one or more computer readable medium may be utilized. The computer readable medium may be a computer readable storage medium. The computer readable storage medium may be a storage device storing the code. The storage device may 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.
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 may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
Code for carrying out operations for embodiments may be any number of lines and may 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 may 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 may 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 may be made to an external computer (for example, through the Internet using an Internet Service Provider).
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” unless expressly specified otherwise. The terms “including,” “comprising,” “having,” and variations thereof mean “including but not limited to,” unless expressly specified otherwise. An enumerated listing 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.
Furthermore, the described features, structures, or characteristics of the embodiments may be combined in any suitable manner. 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 embodiments. One skilled in the relevant art will recognize, however, that embodiments may 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 to avoid obscuring aspects of an embodiment.
Aspects of the embodiments are described below with reference to schematic flowchart diagrams and/or schematic block diagrams of methods, apparatuses, systems, and program products according to embodiments. It will be understood that each block of the schematic flowchart diagrams and/or schematic block diagrams, and combinations of blocks in the schematic flowchart diagrams and/or schematic block diagrams, can be implemented by code. The code may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the schematic flowchart diagrams and/or schematic block diagrams block or blocks.
The code may 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.
The code may 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 and/or block diagram block or blocks.
The schematic flowchart diagrams and/or schematic block diagrams in the Figures illustrate 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 may represent a module, segment, or portion of code, which includes one or more executable instructions of the code for implementing the specified logical function(s).
It should also be noted that, in some alternative implementations, the functions noted in the block may 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 may sometimes be executed in the reverse order, depending upon the functionality involved. Other steps and methods may be conceived that are equivalent in function, logic, or effect to one or more blocks, or portions thereof, of the illustrated Figures.
Although various arrow types and line types may be employed in the flowchart and/or block diagrams, they are understood not to limit the scope of the corresponding embodiments. Indeed, some arrows or other connectors may be used to indicate only the logical flow of the depicted embodiment. For instance, an arrow may indicate a waiting or monitoring period of unspecified duration between enumerated steps of the depicted embodiment. It will also be noted that each block of the block diagrams and/or flowchart diagrams, and combinations of blocks in the block diagrams and/or flowchart diagrams, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and code.
The description of elements in each figure may refer to elements of proceeding figures Like numbers refer to like elements in all figures, including alternate embodiments of like elements.
In one embodiment, the remote units 102 may 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 on-board computers, network devices (e.g., routers, switches, modems), aerial vehicles, drones, or the like. In some embodiments, the remote units 102 include wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like. Moreover, the remote units 102 may be referred to as subscriber units, mobiles, mobile stations, users, terminals, mobile terminals, fixed terminals, subscriber stations, UE, user terminals, a device, or by other terminology used in the art. The remote units 102 may communicate directly with one or more of the network units 104 via UL communication signals. In certain embodiments, the remote units 102 may communicate directly with other remote units 102 via sidelink communication.
The network units 104 may be distributed over a geographic region. In certain embodiments, a network unit 104 may also be referred to and/or may include one or more of an access point, an access terminal, a base, a base station, a location server, 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 aerial 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”), a UDM/UDR, a policy control function (“PCF”), a radio access network (“RAN”), a network slice selection function (“NSSF”), an 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 communicably coupled to one or more corresponding network units 104. The radio access network is generally communicably coupled to one or more core networks, which may be coupled to other networks, like the Internet and public switched telephone networks, among other networks. These and other elements of radio access and core networks are not illustrated but are well known generally by those having ordinary skill in the art.
In one implementation, the wireless communication system 100 is compliant with NR protocols standardized in third generation partnership project (“3GPP”), wherein the network unit 104 transmits 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 may implement some other open or proprietary communication protocol, for example, WiMAX, institute of electrical and electronics engineers (“IEEE”) 802.11 variants, global system for mobile communications (“GSM”), general packet radio service (“GPRS”), universal mobile telecommunications system (“UMTS”), long term evolution (“LTE”) variants, code division multiple access 2000 (“CDMA2000”), 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.
The network units 104 may 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.
In various embodiments, a remote unit 102 may receive at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. In some embodiments, the remote unit 102 may identify a set of transmission hypotheses based on the channel state information reporting setting. The hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. In certain embodiments, the remote unit 102 may receive at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. In various embodiments, the remote unit 102 may generate a set of at least one channel state information report based on the channel state information reporting setting. The at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In some embodiments, the remote unit 102 may feedback the set of the at least one channel state information report to the mobile communication network. Accordingly, the remote unit 102 may be used for channel state information report configuration.
In certain embodiments, a network unit 104 may transmit at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. A set of transmission hypotheses is identified based on the channel state information reporting setting, the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. In some embodiments, the network unit 104 may transmit at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. A set of at least one channel state information report is generated based on the channel state information reporting setting, the at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In certain embodiments, the network unit 104 may receive feedback including the set of the at least one channel state information report to the mobile communication network. Accordingly, the network unit 104 may be used for channel state information report configuration.
The processor 202, in one embodiment, may include any known controller capable of executing computer-readable instructions and/or capable of performing logical operations. For example, the processor 202 may 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 the 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.
The memory 204, in one embodiment, is a computer readable storage medium. In some embodiments, the memory 204 includes volatile computer storage media. For example, the memory 204 may include a RAM, including dynamic RAM (“DRAM”), synchronous dynamic RAM (“SDRAM”), and/or static RAM (“SRAM”). In some embodiments, the memory 204 includes non-volatile computer storage media. For example, the memory 204 may include a hard disk drive, a flash memory, or any other suitable non-volatile computer storage device. In some embodiments, the memory 204 includes both volatile and non-volatile computer storage media. In some embodiments, the memory 204 also stores program code and related data, such as an operating system or other controller algorithms operating on the remote unit 102.
The input device 206, in one embodiment, may include any known computer input device including a touch panel, a button, a keyboard, a stylus, a microphone, or the like. In some embodiments, the input device 206 may be integrated with the display 208, for example, as a touchscreen or similar touch-sensitive display. In some embodiments, the input device 206 includes a touchscreen such that text may be input using a virtual keyboard displayed on the touchscreen and/or by handwriting on the touchscreen. In some embodiments, the input device 206 includes two or more different devices, such as a keyboard and a touch panel.
The display 208, in one embodiment, may include any known electronically controllable display or display device. The display 208 may be designed to output visual, audible, and/or haptic signals. In some embodiments, the display 208 includes an electronic display capable of outputting visual data to a user. For example, the display 208 may 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, or the like to a user. As another, non-limiting, example, the display 208 may include a wearable display such as a smart watch, smart glasses, a heads-up display, or the like. Further, the display 208 may 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, or the like.
In certain embodiments, the display 208 includes one or more speakers for producing sound. For example, the display 208 may produce an audible alert or notification (e.g., a beep or chime). In some embodiments, the display 208 includes one or more haptic devices for producing vibrations, motion, or other haptic feedback. In some embodiments, all or portions of the display 208 may be integrated with the input device 206. For example, the input device 206 and display 208 may form a touchscreen or similar touch-sensitive display. In other embodiments, the display 208 may be located near the input device 206.
In certain embodiments, the receiver 212 receives at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. In various embodiments, the processor 202 identifies a set of transmission hypotheses based on the channel state information reporting setting. The hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. The receiver 212 receives at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. The processor 202 generates a set of at least one channel state information report based on the channel state information reporting setting. The at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. The transmitter 210 feeds back the set of the at least one channel state information report to the mobile communication network. Although only one transmitter 210 and one receiver 212 are illustrated, the remote unit 102 may have any suitable number of transmitters 210 and receivers 212. The transmitter 210 and the receiver 212 may be any suitable type of transmitters and receivers. In one embodiment, the transmitter 210 and the receiver 212 may be part of a transceiver.
In certain embodiments, the transmitter 310: transmits at least one channel state information reporting setting, wherein the at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network, wherein a set of transmission hypotheses is identified based on the channel state information reporting setting, the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points; and transmits at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. A set of at least one channel state information report is generated based on the channel state information reporting setting, the at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In various embodiments, the receiver 312 receives feedback including the set of the at least one channel state information report to the mobile communication network.
In certain embodiments, such as for 3GPP new radio (“NR”), multiple transmission and reception points (“TRPs”) or multi-antenna panels within a TRP may communicate simultaneously with one user equipment (“UE”) to enhance coverage, throughput, and/or reliability. These enhancements may come at the expense of excessive control signaling between the network side and the UE side so as to communicate the best transmission configuration (e.g., whether to support multi-point transmission), and, if so, which TRPs would operate simultaneously, in addition to a possibly super-linear increase in the amount of channel state information (“CSI”) feedback reported from the UE to the network, since a distinct report may be needed for each transmission configuration. In some embodiments, such as for a Type-II codebook with high resolution, a number of precoder matrix indicator (“PMI”) bits fed back from the UE in a gNB via uplink control information (“UCI”) may be very large (e.g., >1000 bits at a large bandwidth) even for a single-point transmission. In such embodiments, reducing the number of PMI feedback bits per report may be crucial to improve efficiency. In various embodiments, multiple input multiple output (“MIMO”) enhancements may include multi TRP (“mTRP”) and multi-panel transmissions. The purpose of mTRP transmission may be to improve a spectral efficiency as well as a reliability and robustness of a connection, and it may cover both ideal and nonideal backhaul. In certain embodiments, for increasing a reliability using mTRP, ultra-reliable low-latency communication (“URLLC”) under mTRP transmission may be used, where the UE may be served by multiple TRPs forming a coordination cluster, possibly connected to a central processing unit.
In some embodiments, a UE may be dynamically scheduled to be served by one of multiple TRPs in a cluster. In such embodiments, the network may pick two TRPs to perform joint transmission. Moreover, in such embodiments, the UE may need to report needed CSI information for the network for it to decide an mTRP downlink transmission scheme. In various embodiments, a number of transmission hypotheses increases exponentially with a number of TRPs in the coordination cluster. For example, for 4 TRPs, there are 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 dramatically increases with the size of the coordination cluster. In general, the presence of K TRPs may trigger up to
where
represents a binomial coefficient representing a number of possible unordered n-tuples selected from a set of K elements, where n≤K.
In certain embodiments, UL transmission resources on which CSI reports are transmitted might not be enough, and partial CSI omission may be necessary. In some embodiments, CSI reports may be prioritized according to: 1) time-domain behavior and physical channel, where more dynamic reports are given precedence over less dynamic reports and a physical uplink shared channel (“PUSCH”) has precedence over a physical uplink control channel (“PUCCH”); 2) CSI content, where beam reports (e.g., layer 1 (“L1”) reference signal received power (“RSRP”) (“L1-RSRP”) reporting) have priority over regular CSI reports; 3) a serving cell to which the CSI corresponds (e.g., for carrier aggregation (“CA”) operation—CSI corresponding to a primary cell (“PCell”) has priority over CSI corresponding to secondary cells (“SCells”)); and/or 4) a CSI report setting identifier (“ID”) (e.g., reportConfigID).
In various embodiments, for the purpose of mTRP URLLC physical downlink shared channel (“PDSCH”) transmission, a UE may be enabled to: 1) reduce CSI reporting overhead without degrading performance; and/or 2) limit CSI triggering and reporting overhead and complexity for mTRP transmission to levels that are close to that of CSI triggering and reporting for single-TRP transmission.
In certain embodiments, one or more elements or features from one or more of the described embodiments herein may be combined (e.g., for CSI measurement, feedback generation and/or reporting) which may reduce overall CSI feedback overhead.
In some embodiments, one or more of the following assumptions may be made: 1) the “TRP” notion may include at least one of TRPs, nodes, panels, communication means (e.g., signals and/or channels) associated with a control resource set (“CORESET”) pool, communication associated with a transmission configuration indicator (“TCI”) state from a transmission configuration comprising at least two TCI states; 2) a codebook type used is arbitrary (e.g., flexibility to use different codebook types (e.g., Type-I and Type-II codebooks) unless otherwise stated); and/or 3) either a single downlink control information (“DCI”) or multiple DCI that trigger a UE, where an mTRP scheme is based on spatial division multiplexing (“SDM”) (e.g., scheme 1a), frequency division multiplexing (“FDM”) (e.g., schemes 2a and/or 2b), and/or time division multiplexing (“TDM”) (e.g., schemes 3 and/or 4). Other transmission schemes may also be used.
In various embodiments, a UE is configured by higher layers with one or more CSI-ReportConfig reporting settings for CSI reporting, one or more CSI-ResourceConfig resource settings for CSI measurement, and one or two lists of trigger states (e.g., given by higher layer parameters CSI-AperiodicTriggerStateList and CSI-SemiPersistentOnPUSCH-TriggerStateList). Each trigger state in a CSI-AperiodicTriggerStateList may contain a list of a subset of associated CSI-ReportConfigs indicating resource set IDs for a channel and/or for interference. Each trigger state in CSI-SemiPersistentOnPUSCH-TriggerStateList may contain one or more associated CSI-ReportConfig.
In a first embodiment, multi-TRP transmissions may be indicated to a UE via a TCI value. In one example, two TCI states are indicated in triggering downlink control information (“DCI”). In another example, one TCI codepoint is indicated in triggering DCI, and the TCI codepoint corresponds to two TCI states.
In a second embodiment, multi-TRP transmission may be indicated to a UE via a higher-layer parameter (e.g., mTRP-CSI-Enabled) in a CSI-ReportConfig reporting setting. One example of abstract syntax notation (“ASN”) 1 (“ASN.1”) code that corresponds to a CSI-ReportConfig reporting setting IE is provided in
In a third embodiment, multi-TRP transmission may be indicated to a UE via a higher-layer parameter which triggers the UE to report a given number of CSI reports (e.g., numberOfReports) in a CSI-ReportConfig reporting setting or any of its elements (e.g., codebookConfig). Examples of the ASN.1 code corresponding to the CSI-ReportConfig reporting setting IE are provided in
In a fourth embodiment, multi-TRP transmission may be indicated to a UE via triggering two CodebookConfig codebook configurations within one reporting setting, each corresponding to one or more CSI reports. An example of the ASN.1 code the corresponds to the CSI-ReportConfig reporting setting IE is provided in
In a fifth embodiment, multi-TRP transmission may be indicated to a UE via triggering two reportQuantity report quantities within one reporting setting, each corresponding to one or more CSI reports. An example of the ASN.1 code the corresponds to the CSI-ReportConfig reporting setting IE is provided in
In certain embodiments, a UE may be configured with one or more CSI-ReportConfig reporting settings. Different embodiments of CSI reporting settings are found herein. A combination of one or more embodiments herein may be made.
In some embodiments, a CSI-ReportConfig reporting setting configures one CSI report corresponding to a single codebook configuration (e.g., codebookConfig) and/or a single CSI report quantity (e.g., reportQuantity) which has no more than one PMI reported. Different embodiments on RI reporting are as follows: 1) one RI is reported, wherein the layers corresponding to each of two TRPs for multi-TRP transmission may be defined by a rule (e.g., the CSI for the first TRP includes the first ┌RI/2┐ layers' information and the CSI for the second TRP comprises the last └RI/2┘ layers' information, where ┌x┐ represents the ceiling value of x, i.e., the smallest integer value that is greater than or equal to a real value x, and └x┘ represents the floor value of x, i.e., the largest integer value that is smaller than or equal to a real value x); 2) one RI is reported in addition to a one-bit indicator (e.g., λ that emphasizes the number of layers transmitted across both TRPs)—in one example, if RI represents an odd-valued integer, reporting λ=0 implies that the number of layers corresponding to the first and second TRPs are └RI/2┘+1, └RI/2┘ layers, respectively, and reporting λ=1 implies that the number of layers corresponding to the first and second TRPs are └RI/2┘, └RI/2┘+1 layers, respectively, whereas the number of layers corresponding to the first and second TRPs when RI represents an even-valued integer would be the same, i.e., RI/2 layers for each TRP regardless of the value of the indicator and/or 3) two RI values are reported, wherein each RI represents the number of layers corresponding to each of the two TRPs.
In any embodiments described herein, one or more of each of the CRI, SSBRI, CQI, LI, L1-RSRP and L1-SINR may be reported. In one example, up to 3 CQI values are reported in a CSI report corresponding to three transmission hypotheses with single-TRP transmission from the first TRP, single-TRP transmission from the second TRP, and multi-TRP transmission jointly from both TRPs, respectively. If RI>4, more than one CQI value may be reported for one or more hypotheses (e.g., 2 CQI values reported for multi-TRP transmission hypothesis).
In various embodiments, a UE may be configured with one or more CSI-ReportConfig reporting settings. Different embodiments of CSI reporting settings are found herein. A setup with a combination of one or more embodiments herein may be made.
In certain embodiments, a CSI-ReportConfig reporting setting configures one CSI report corresponding to a single codebook configuration (e.g., codebookConfig) and/or a single CSI report quantity (e.g., reportQuantity) which has one or more PMI reported. Different embodiments on PMI and RI reporting are as follows: 1) up to four PMI are reported along with three RI corresponding to three transmission hypotheses—in one example, the first PMI and the first RI correspond to single-TRP transmission from the first TRP, and the second PMI and the second RI correspond to single-TRP transmission from the second TRP, whereas the third and fourth PMI correspond to the first and second TRPs respectively under joint transmission, with the third RI corresponding to the total number of layers across the third and fourth PMI, under multi-TRP transmission hypothesis; 2) up to three PMI are reported along with four RI, corresponding to three transmission hypotheses—in one example, the first PMI and the first RI correspond to single-TRP transmission from the first TRP, and the second PMI and the second RI correspond to single-TRP transmission from the second TRP, whereas the third and fourth RI correspond to the number of layers of the first and the second TRPs respectively under joint transmission, with the third PMI corresponding to the RI3+RI4 layers indicated in the third and fourth RI respectively, under multi-TRP transmission hypothesis; 3) up to three PMI are reported along with three RI, corresponding to three transmission hypotheses—in one example, the first PMI and the first RI correspond to single-TRP transmission from the first TRP, and the second PMI and the second RI correspond to single-TRP transmission from the second TRP, whereas the third PMI and the third RI correspond to the first and second TRPs respectively under joint transmission, where the distribution of layers corresponding to the first and second TRPs is set by a rule, e.g., the CSI for the first TRP comprises ┌RI3/2┐ layers' information and the CSI for the second TRP comprises └RI3/2┘ layers' information, under multi-TRP transmission hypothesis; 4) up to three PMI are reported along with three RI and an additional one-bit indicator λ, corresponding to three transmission hypotheses—in one example, the first PMI and the first RI correspond to single-TRP transmission from the first TRP, and the second PMI and the second RI correspond to single-TRP transmission from the second TRP, whereas the third PMI, the third RI and the indicator correspond to the first and second TRPs under joint transmission, where the distribution of layers corresponding to the first and second TRPs is parametrized by RI and λ under multi-TRP transmission hypothesis—in another example, when RI3 represents an odd-valued integer, reporting λ=0 implies that the number of layers corresponding to the first and second TRPs are └RI3/2┘+1, └RI3/2┘ layers, respectively, and reporting λ=1 implies that the number of layers corresponding to the first and second TRPs are └RI3/2┘, └RI3/2┘+1 layers, respectively, whereas the number of layers corresponding to the first and second TRPs when RI3 represents an even-valued integer would be the same, i.e., RI3/2 layers for each TRP regardless of the value of the indicator λ; and/or 5) up to two PMI are reported along with two RI, corresponding to three transmission hypotheses—in one example, the first PMI and the first RI correspond to single-TRP transmission from the first TRP, and the second PMI and the second RI correspond to single-TRP transmission from the second TRP, whereas combining the first and second PMI correspond to the first and second TRPs respectively under joint transmission, with the rank reported corresponding to the summation of the first and second RI, i.e., RI1+RI2 under multi-TRP transmission hypothesis.
In any embodiments found herein, one or more of each of the CRI, SSBRI, CQI, LI, L1-RSRP and L1-SINR may be reported. In one example, up to 3 CQI values are reported in a CSI report corresponding to three transmission hypotheses with single-TRP transmission from the first TRP, single-TRP transmission from the second TRP, and multi-TRP transmission jointly from both TRPs, respectively. In certain embodiments, if RI>4, more than one CQI value may be reported for one or more hypotheses (e.g., 2 CQI values reported for multi-TRP transmission hypothesis).
In some embodiments, a UE is configured with one or more CSI-ReportConfig reporting settings. Different embodiments of CSI reporting settings are found herein. A setup with a combination of one or more embodiments herein may be made.
In various embodiments, a CSI-ReportConfig reporting setting configures multiple CSI report corresponding to multiple codebook configurations (e.g., codebookConfig) and/or multiple CSI report quantities (e.g., reportQuantity). Different embodiments corresponding to a number of CSI reports, PMI, and RI per report are as in the following nine options.
In a first option, up to four CSI reports are triggered in one CSI-ReportConfig, where each CSI report contains no more than a single PMI a single RI and a single CQI—in one example, the first CSI report corresponds to single-TRP transmission from the first TRP, and the second CSI report corresponds to single-TRP transmission from the second TRP, whereas the third and the fourth CSI reports correspond to the first and second TRPs respectively under joint transmission with total rank of RI(3)+RI(4), under multi-TRP transmission hypothesis—for the third and fourth CSI reports, the CQI values in the third and fourth CSI reports can be set to have the same values, i.e., CQI(3)=CQI(4). In some embodiments, CQI may not be reported in one of the third and fourth CSI reports, or can have a dummy value or CSI report (e.g., fourth CSI report) can include an indication indicating that the CQI (e.g., CQI(4) in fourth CSI report) is the same as that reported in another CSI another report (e.g., CQI(3) in third CSI report 3)—when RI(3)+RI(4)>4, two CQI values may be needed for joint transmission under multi-TRP, which may be reported in one of the third and fourth CSI reports, or alternatively the first of the two CQI values would be reported in the third CSI report, and the second of the two CQI values would be reported in the fourth CSI report—also, when the total number of layers in the first or second CSI report is larger than 4, up to two CQI values may be reported in this CSI report. In various embodiments, one report quantity (e.g., reportQuantity) and one codebook configuration (e.g., codebookConfig) may be configured within a CSI-ReportConfig reporting setting.
In a second option, up to three CSI reports are triggered in one CSI-ReportConfig. In one example, the first CSI report corresponds to single-TRP transmission from the first TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, and the second CSI report corresponds to single-TRP transmission from the second TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, whereas the third CSI report corresponds to joint transmission under multi-TRP, and includes one RI, one CQI, and up to two PMI corresponding to the first and second TRPs respectively under joint transmission. It should be noted that if a total number of layers in one CSI report is larger than 4, up to two CQI values may be reported in the CSI report. Moreover, up to two report quantities reportQuantity and up to two codebook configurations codebookConfig may be configured within a CSI-ReportConfig reporting setting.
In a third option, up to three CSI reports are triggered in one CSI-ReportConfig. In one example, the first CSI report corresponds to single-TRP transmission from the first TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, and the second CSI report corresponds to single-TRP transmission from the second TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, whereas the third CSI report corresponds to joint transmission under multi-TRP, and includes one CQI, one PMI, and two RIs that represent the number of layers corresponding to the first and second TRPs respectively, where the PMI corresponds to a total number of layers equal to the summation of the values of the two RIs (e.g., RI1(3)+RI2(3)). In certain embodiments, a total number of layers in one CSI report is larger than 4, and up to two CQI values may be reported in the CSI report. In some embodiments, up to two report quantities (e.g., reportQuantity) and up to two codebook configurations (e.g., codebookConfig) may be configured within a CSI-ReportConfig reporting setting.
In a fourth option, up to three CSI reports are triggered in one CSI-ReportConfig. In one example, the first CSI report corresponds to single-TRP transmission from the first TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, and the second CSI report corresponds to single-TRP transmission from the second TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, whereas the third CSI report corresponds to joint transmission under multi-TRP, and includes one PMI, one CQI, one RI, and a one-bit indicator that correspond to the first and second TRPs under joint transmission, where the distribution of layers corresponding to the first and second TRPs is parametrized by RI and λ under multi-TRP transmission hypothesis. In another example, if RI(3) represents an odd-valued integer, reporting) λ=0 implies that a number of layers corresponding to the first and second TRPs are └RI(3)/2┘+1, └RI(3)/2┘ layers, respectively, and reporting λ=1 implies that the number of layers corresponding to the first and second TRPs are └RI(3)/2┘, └RI(3)/2┘+1 layers, respectively, whereas the number of layers corresponding to the first and second TRPs when RI(3) represents an even-valued integer would be the same (e.g., RI(3)/2 layers for each TRP regardless of the value of the indicator λ). If a total number of layers whose information are indicated in the PMI of a CSI report is larger than 4, up to two CQI values may be reported in the CSI report.
In a fifth option, up to three CSI reports are triggered in one CSI-ReportConfig. In one example, the first CSI report corresponds to single-TRP transmission from the first TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, and the second CSI report corresponds to single-TRP transmission from the second TRP, and includes one (e.g., no more than one) PMI, one RI, and one CQI, whereas the third CSI report corresponds to joint transmission under multi-TRP, and includes one PMI, one CQI, and one RI that correspond to the first and second TRPs under joint transmission, where the distribution of layers corresponding to the first and second TRPs is set by a rule (e.g., the CSI for the first TRP comprises ┌RI(3)/2┐ layers' information and the CSI for the second TRP comprises └RI(3)/2┘ layers' information, under multi-TRP transmission hypothesis). If a total number of layers whose information are indicated in the PMI of a CSI report is larger than 4, up to two CQI values may be reported in the CSI report.
In a sixth option, up to three CSI reports are triggered in one CSI-ReportConfig. In one example, each of the first and second CSI reports correspond to single-TRP transmission from the first and second TRP respectively, and each includes one CQI and up to one RI, and the third CSI report corresponds to joint transmission under multi-TRP, and includes one CQI, up to two RI, and up to two PMI corresponding to the first and second TRPs under joint transmission, respectively. The first and second PMI in the third CSI report may be used for single-TRP transmission in conjunction with the first CSI report for single-TRP transmission under the first TRP and the second CSI report for single-TRP transmission under the second TRP, respectively. In various embodiments, the first and second CSI reports may not include any RI whereas the third CSI report may include two RI (e.g., RI3(1) and RI3(1) for the number of layers across PMI1(3) and PMI2(3), respectively). In some embodiments, first and second CSI reports may not include an RI and the third CSI report may include one RI (e.g., RI(3) corresponding to the sum of layers across PMI1(3) and PMI2(3), respectively). If a total number of layers whose information are indicated in the PMI of a CSI report is larger than 4, up to two CQI values may be reported in the CSI report.
In a seventh option, up to three CSI reports are triggered in one CSI-ReportConfig. In one example, each of the first and second CSI reports corresponds to single-TRP transmission from the first and second TRP respectively, and each includes one CQI, one RI, and one PMI, and the third CSI report corresponds to joint transmission under multi-TRP, and includes one CQI, and up to one RI. The PMI in the first and second CSI reports may be combined to obtain CSI for joint transmission between the first and second TRP, respectively, for multi-TRP transmission, and the RI in the third report may be a summation of the RI in the first two CSI reports (e.g., RI(3)=RI(1)+RI(2)). In various embodiments, a third CSI report may not include any RI whereas a number of layers for multi-TRP transmission may be inferred from RI(1) and RI(2). If a total number of layers whose information are indicated in the PMI of a CSI report is larger than 4, up to two CQI values may be reported in the CSI report.
In an eighth option, up to two CSI reports may be triggered in one CSI-ReportConfig, where each CSI report contains up to two PMI, up to two RI, and up to two CQI. In one example, the first CSI report corresponds to the first TRP, wherein the first PMI, RI, and CQI correspond to single-TRP transmission from the first TRP, and the second PMI, RI, and CQI correspond to CSI for the first TRP under joint transmission in multi-TRP mode, whereas the second CSI report corresponds to the second TRP, wherein the first PMI, RI, and CQI correspond to single-TRP transmission from the second TRP, and the second PMI, RI, and CQI correspond to CSI for the second TRP under joint transmission in multi-TRP mode. The total rank reported for multi-TRP transmission may be the sum of the second RIs in the first and second CSI reports, respectively (e.g., RI2(1)+R12(2)). The second CQI values in the first and second CSI reports may be set to have the same values (e.g., CQI2(1)=CQI2(2)). In various embodiments, a second CQI may not be reported in one of the first and second CSI reports, or may have a dummy value. If RI2(1)+R12(2)>4, two CQI values may be needed for joint transmission under multi-TRP, which may be reported in one of the first and second CSI reports, or the first of the two CQI values may be reported in the first CSI report, and the second of the two CQI values may be reported in the second CSI report. In certain embodiments, if a first RI in a first or second CSI report is larger than 4, an additional CQI value may be reported in this CSI report corresponding to single-TRP transmission. In some embodiments, one report quantity (e.g., reportQuantity) and one codebook configuration (e.g., codebookConfig) may be configured within a CSI-ReportConfig reporting setting.
In a ninth option, up to two CSI reports are triggered in one CSI-ReportConfig, where the first of two CSI reports contains a single PMI, a single RI, and a single CQI, and the second of two CSI reports contains up to two PMI, up to two RI, and one CQI. In one example, a first CSI report corresponds to single-TRP transmission from either the first or second TRP, and the second CSI report includes one RI, one CQI, and two PMI corresponding to joint transmission from the first and second TRPs, respectively. In another example, the first CSI report corresponds to single-TRP transmission from either the first or second TRP, and the second CSI report includes one CQI and two PMI and/or RI corresponding to joint transmission from the first and second TRPs, respectively. In a third example, the first CSI report corresponds to single-TRP transmission from either the first or second TRP, and the second CSI report includes one CQI, one PMI, one RI, and an additional one-bit indicator λ corresponding to joint transmission from the first and second TRPs respectively, where λ is defined previously. If a total number of layers whose information are indicated in either CSI report is larger than 4, up to two CQI values may be reported in the CSI report. In some of the examples, the first CSI report may include an indication of whether the first CSI report corresponds to either a first or second TRP.
It should be noted that in the embodiments described herein, one or more of each of the CRI, SSBRI, LI, L1-RSRP, and L1-SINR may be reported. If RI>4, more than one CQI value may be reported for one or more hypotheses (e.g., 2 CQI values reported for multi-TRP transmission hypothesis).
In various embodiments, multiple CQI values may be reported in one CSI report, or across multiple CSI reports triggered with the same CSI-ReportConfig. Different embodiments of CQI feedback are found herein. A setup with a combination of one or more embodiments herein may be made.
In certain embodiments, a number of CQI reported in one or more CSI reports triggered by the same CSI-ReportConfig is proportional to the number of PMI (e.g., NPMI=NCQI) on the condition that this PMI includes no more than 4 layers, otherwise it may correspond to 2 CQI values. In one example, if 2 PMI are reported, where one PMI includes information for 3 layers and the second PMI including information for 6 layers, 3 CQI values are reported (e.g., one corresponding to the first PMI and two corresponding to the last PMI).
In some embodiments, if more than one CQI is reported in one CSI report, a first CQI is reported in CSI Part 1, whereas all other subsequent CQI are reported in CSI Part 2.
In various embodiments, if more than one CQI is reported, the CQI subsequent to the first CQI are computed in a differential manner with respect to CSI Part 1, (e.g., CQI1=CQI1,Reported and CQI2=CQI1,Reported+CQI2,Reported, where CQI1,Reported, CQI2,Reported represent the reported CQI index value in the CSI report, and CQI1, CQI2, represent the CQI index values adjusted by the network). CQI values may correspond to a either a wideband CQI index, a sub-band CQI index, or both.
In certain embodiments, a cqi-FormatIndicator CQI format indicator may always be set to ‘widebandCQI’ whenever multiple CSI reports or multiple PMI are triggered.
In some embodiments, only one cqi-FormatIndicator CQI format indicator is configured in a CSI-ReportConfig reporting setting for a subset of the CQI values triggered per reporting setting, whereas a remainder of the CQI values are always reported in wideband format.
In various embodiments, multiple CQI format indicators are triggered in the same to CSI-ReportConfig reporting setting corresponding to different CQI values reported. In one example, the first CQI format indicator (e.g., cqi-FormatIndicator) represents one CQI and the second CQI format indicator (e.g., cqi-FormatIndicator1) represents subsequent CQI values. An example of the ASN.1 code the corresponds to the CSI-ReportConfig reporting setting IE is provided in
In certain embodiments, CSI feedback for one or more channel hypotheses corresponding to different transmission modes may be supported in one CSI report for multi-TRP transmission. Different embodiments of how the CSI for different hypotheses are multiplexed across one or more CSI reports are found herein. A setup with a combination of one or more embodiments herein may be made.
In some embodiments, a CSI report corresponding to a single-TRP transmission hypothesis has a higher priority as compared with a CSI report corresponding to multi-TRP transmission. In one example, a CSI report corresponding to multi-TRP hypothesis includes multiple PMI in a CSI report for rank that is no larger than 4.
In various embodiments, PMI corresponding to channel hypotheses with higher CQI are multiplexed, encoded, and/or listed before PMI corresponding to channel hypotheses with relatively lower CQI value. In one example, if single-TRP CSI has a higher wideband CQI as compared with multi-TRP CSI, the PMI corresponding to single-TRP hypothesis may be multiplexed, encoded, and/or listed before PMI corresponding to multi-TRP hypothesis.
In certain embodiments, an indicator is reported in one or more CSI reports which identifies the order in which the CSI is multiplexed. In one example, a one-bit indicator (e.g., 6) is included in a CSI report. If δ=0, the PMI corresponding to multi-TRP hypothesis is multiplexed, encoded, and/or listed before the PMI corresponding to single-TRP hypothesis, whereas if δ=1, the PMI corresponding to multi-TRP hypothesis is multiplexed, encoded, and/or listed after the PMI corresponding to single-TRP hypothesis.
In some embodiments, an indicator is reported in one or more CSI reports, which identifies the channel hypothesis for which CSI is reported. In one example, a one-bit indicator (e.g., δ) is included in a CSI report. If δ=0, the PMI corresponding to single-TRP hypothesis from the first TRP is reported, whereas if δ=1 the PMI corresponding to single-TRP hypothesis from the second TRP is reported. In another example, if δ=0, the PMI corresponding to single-TRP hypothesis is reported, whereas if δ=1 the PMI corresponding to multi-TRP hypothesis is reported.
In some embodiments, the terms antenna, panel, and antenna panel are used interchangeably. An antenna panel may be hardware that is used for transmitting and/or receiving radio signals at frequencies lower than 6 GHz (e.g., frequency range 1 (“FR1”)), or higher than 6 GHz (e.g., frequency range 2 (“FR2”) or millimeter wave (“mmWave”)). In certain embodiments, an antenna panel may include an array of antenna elements. Each antenna element may be connected to hardware, such as a phase shifter, that enables a control module to apply spatial parameters for transmission and/or reception of signals. The resulting radiation pattern may be called a beam, which may or may not be unimodal and may allow the device to amplify signals that are transmitted or received from spatial directions.
In various embodiments, an antenna panel may or may not be virtualized as an antenna port. An antenna panel may 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. A capability of a device in terms of a number of antenna panels, their duplexing capabilities, their beamforming capabilities, and so forth, may or may not be transparent to other devices. In some embodiments, capability information may be communicated via signaling or capability information may be provided to devices without a need for signaling. If information is available to other devices the information may be used for signaling or local decision making.
In some embodiments, a UE antenna panel may be a physical or logical antenna array including a set of antenna elements or antenna ports that share a common or a significant portion of a radio frequency (“RF”) chain (e.g., in-phase and/or quadrature (“I/Q”) modulator, analog to digital (“A/D”) converter, local oscillator, phase shift network). The UE antenna panel or UE panel may be a logical entity with physical UE antennas mapped to the logical entity. The mapping of physical UE antennas to the logical entity may be up to UE implementation. Communicating (e.g., receiving or transmitting) on at least a subset of antenna elements or antenna ports active for radiating energy (e.g., active elements) of an antenna panel may require biasing or powering on of an RF chain which results in current drain or power consumption in a 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). The phrase “active for radiating energy,” as used herein, is not meant to be limited to a transmit function but also encompasses a receive function. Accordingly, an antenna element that is active for radiating energy may be coupled to a transmitter to transmit radio frequency energy or to a receiver to receive radio frequency energy, either simultaneously or sequentially, or may be coupled to a transceiver in general, for performing its intended functionality. Communicating on the active elements of an antenna panel enables generation of radiation patterns or beams.
In certain embodiments, depending on a UE's own implementation, a “UE panel” may have at least one of the following functionalities as an operational role of unit of antenna group to control its transmit (“TX”) beam independently, unit of antenna group to control its transmission power independently, and/pr unit of antenna group to control its transmission timing independently. The “UE panel” may be transparent to a gNB. For certain conditions, a gNB or network may assume that a mapping between a UE's physical antennas to the logical entity “UE panel” may not be changed. For example, a condition may include until the next update or report from UE or include a duration of time over which the gNB assumes there will be no change to mapping. A UE may report its UE capability with respect to the “UE panel” to the gNB or network. The UE capability may include at least the number of “UE panels.” In one embodiment, a UE may support UL transmission from one beam within a panel. With multiple panels, more than one beam (e.g., one beam per panel) may be used for UL transmission. In another embodiment, more than one beam per panel may be supported and/or used for UL transmission.
In some embodiments, an antenna port may be defined such that a channel over which a symbol on the antenna port is conveyed may be inferred from the channel over which another symbol on the same antenna port is conveyed.
In certain embodiments, two antenna ports are said to be quasi co-located (“QCL”) if large-scale properties of a channel over which a symbol on one antenna port is conveyed may be inferred from the channel over which a symbol on another antenna port is conveyed. Large-scale properties may include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and/or spatial receive (“RX”) parameters. Two antenna ports may be quasi co-located with respect to a subset of the large-scale properties and different subset of large-scale properties may be indicated by a QCL Type. For example, a qcl-Type may 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}; and 4) ‘QCL-TypeD’: {Spatial Rx parameter}. Other QCL-Types may be defined based on combination of one or large-scale properties.
In various embodiments, spatial RX parameters may 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.
In certain embodiments, QCL-TypeA, QCL-TypeB, and QCL-TypeC may be applicable for all carrier frequencies, but QCL-TypeD may be applicable only in higher carrier frequencies (e.g., mmWave, FR2, and beyond), where the UE may not be able to perform omni-directional transmission (e.g., the UE would need to form beams for directional transmission). For a QCL-TypeD between two reference signals A and B, the reference signal A is considered to be spatially co-located with reference signal B and the UE may assume that the reference signals A and B can be received with the same spatial filter (e.g., with the same RX beamforming weights).
In some embodiments, an “antenna port” may be a logical port that may correspond to a beam (e.g., resulting from beamforming) or may correspond to a physical antenna on a device. In certain embodiments, a physical antenna may map directly to a single antenna port in which an antenna port corresponds to an actual physical antenna. In various embodiments, a set of physical antennas, a subset of physical antennas, an antenna set, an antenna array, or an antenna sub-array may be mapped to one or more antenna ports after applying complex weights and/or a cyclic delay to the signal on each physical antenna. The physical antenna set may have antennas from a single module or panel or from multiple modules or panels. The weights may be fixed as in an antenna virtualization scheme, such as cyclic delay diversity (“CDD”). A procedure used to derive antenna ports from physical antennas may be specific to a device implementation and transparent to other devices.
In certain embodiments, a transmission configuration indicator (“TCI”) state (“TCI-state”) associated with a target transmission may indicate parameters for configuring a quasi-co-location relationship between the target transmission (e.g., target RS of demodulation (“DM”) reference signal (“RS”) (“DM-RS”) ports of the target transmission during a transmission occasion) and a source reference signal (e.g., synchronization signal block (“SSB”), CSI-RS, and/or sounding reference signal (“SRS”)) with respect to quasi co-location type parameters indicated in a corresponding TCI state. The TCI describes which reference signals are used as a QCL source, and what QCL properties may be derived from each reference signal. A device may receive a configuration of a plurality of transmission configuration indicator states for a serving cell for transmissions on the serving cell. In some embodiments, a TCI state includes at least one source RS to provide a reference (e.g., UE assumption) for determining QCL and/or a spatial filter.
In some embodiments, spatial relation information associated with a target transmission may indicate a spatial setting between a target transmission and a reference RS (e.g., SSB, CSI-RS, and/or SRS). For example, a UE may transmit a target transmission with the same spatial domain filter used for receiving a reference RS (e.g., DL RS such as SSB and/or CSI-RS). In another example, a UE may transmit a target transmission with the same spatial domain transmission filter used for the transmission of a RS (e.g., UL RS such as SRS). A UE may receive a configuration of multiple spatial relation information configurations for a serving cell for transmissions on a serving cell.
In various embodiments, the method 1000 includes receiving 1002 at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. In some embodiments, the method 1000 includes identifying 1004 a set of transmission hypotheses based on the channel state information reporting setting. The hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. In certain embodiments, the method 1000 includes receiving 1006 at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. In various embodiments, the method 1000 includes generating 1008 a set of at least one channel state information report based on the channel state information reporting setting. The at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In some embodiments, the method 1000 includes feeding 1010 back the set of the at least one channel state information report to the mobile communication network.
In certain embodiments, the indication of channel state information feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter: indicates multiple transmission and reception point channel state information reporting; includes at least two channel state information reference signal identifiers corresponding to at least two channel state information reference signal resources; indicates two channel state information reference signal port groups per channel state information reference signal resource; indicates a number of channel state information reports; indicates multiple codebook configurations; indicates a pair of report quantities; indicates a transmission configuration indicator codepoint in a downlink control information, wherein the transmission configuration indicator codepoint corresponds to two transmission configuration indicator states; or some combination thereof. In some embodiments, the at least one channel state information report comprises up to four precoder matrix indicator values, and up to three rank indicator values.
In various embodiments, a first precoder matrix indicator value of the four precoder matrix indicator values and a first rank indicator value of the three rank indicator values correspond to a first transmission and reception point transmission hypothesis of two single transmission and reception point transmission hypotheses, a second precoder matrix indicator value of the four precoder matrix indicator values and a second rank indicator value of the three rank indicator values correspond to a second transmission and reception point transmission hypothesis of the two single transmission and reception point transmission hypotheses, and a third precoder matrix indicator value and a fourth precoder matrix indicator value of the four precoder matrix indicator values and a third rank indicator value of the three rank indicator values correspond to a joint transmission hypothesis from two transmission and reception points. In one embodiment, the third rank indicator value of the three rank indicator values corresponds to a number of layers corresponding to both of the two transmission and reception points, and the number of layers corresponding to both of the two transmission and reception points is defined by a rule.
In certain embodiments, the at least one channel state information report comprises three channel state information reports that are fed back to the mobile communication network, a first channel state information report of the three channel state information reports corresponds to a first transmission and reception point transmission hypotheses of two single transmission and reception point transmission hypotheses, a second channel state information report of the three channel state information reports corresponds to a second transmission and reception point transmission hypotheses of the two single transmission and reception point transmission hypotheses, and a third channel state information report of the three channel state information reports corresponds to a joint transmission hypothesis from two transmission and reception points. In some embodiments, the first channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator and the second channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator.
In various embodiments, the third channel state information report comprises two precoder matrix indicators, one rank indicator, and one channel quality indicator. In one embodiment, the third channel state information report comprises two precoder matrix indicators, two rank indicators, and one channel quality indicator. In certain embodiments, a first rank indicator of the two rank indicators corresponds to a number of layers of a first precoder matrix indicator of the two precoder matrix indicators, and a second rank indicator of the two rank indicators corresponds to a number of layers of a second precoder matrix indicator of the two precoder matrix indicators.
In some embodiments, a first subset of the at least one value corresponding to a single transmission and reception point hypotheses has a higher priority with respect to an order of reporting compared with a second subset of the at least one value corresponding to a joint transmission hypothesis. In various embodiments, the at least one value corresponding to a transmission hypothesis are reported in a descending order of a channel quality indicator value corresponding to the transmission hypothesis. In one embodiment, an order in which the at least one value is reported in the at least one channel state information report is multiplexed is indicated by a value of a parameter reported within the at least one channel state information report, and the parameter reported corresponds to at least one transmission hypotheses.
In various embodiments, the method 1100 includes transmitting 1102 at least one channel state information reporting setting. The at least one channel state information reporting setting includes at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network. A set of transmission hypotheses is identified based on the channel state information reporting setting, the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points. In some embodiments, the method 1100 includes transmitting 1104 at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting. A set of at least one channel state information report is generated based on the channel state information reporting setting, the at least one channel state information report includes at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses. In certain embodiments, the method 1100 includes receiving 1106 feedback including the set of the at least one channel state information report to the mobile communication network.
In certain embodiments, the indication of channel state information feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter: indicates multiple transmission and reception point channel state information reporting; includes at least two channel state information reference signal identifiers corresponding to at least two channel state information reference signal resources; indicates two channel state information reference signal port groups per channel state information reference signal resource; indicates a number of channel state information reports; indicates multiple codebook configurations; indicates a pair of report quantities; indicates a transmission configuration indicator codepoint in a downlink control information, wherein the transmission configuration indicator codepoint corresponds to two transmission configuration indicator states; or some combination thereof. In some embodiments, the at least one channel state information report comprises up to four precoder matrix indicator values, and up to three rank indicator values.
In various embodiments, a first precoder matrix indicator value of the four precoder matrix indicator values and a first rank indicator value of the three rank indicator values correspond to a first transmission and reception point transmission hypothesis of two single transmission and reception point transmission hypotheses, a second precoder matrix indicator value of the four precoder matrix indicator values and a second rank indicator value of the three rank indicator values correspond to a second transmission and reception point transmission hypothesis of the two single transmission and reception point transmission hypotheses, and a third precoder matrix indicator value and a fourth precoder matrix indicator value of the four precoder matrix indicator values and a third rank indicator value of the three rank indicator values correspond to a joint transmission hypothesis from two transmission and reception points. In one embodiment, the third rank indicator value of the three rank indicator values corresponds to a number of layers corresponding to both of the two transmission and reception points, and the number of layers corresponding to both of the two transmission and reception points is defined by a rule.
In certain embodiments, the at least one channel state information report comprises three channel state information reports that are fed back to the mobile communication network, a first channel state information report of the three channel state information reports corresponds to a first transmission and reception point transmission hypotheses of two single transmission and reception point transmission hypotheses, a second channel state information report of the three channel state information reports corresponds to a second transmission and reception point transmission hypotheses of the two single transmission and reception point transmission hypotheses, and a third channel state information report of the three channel state information reports corresponds to a joint transmission hypothesis from two transmission and reception points. In some embodiments, the first channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator and the second channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator.
In various embodiments, the third channel state information report comprises two precoder matrix indicators, one rank indicator, and one channel quality indicator. In one embodiment, the third channel state information report comprises two precoder matrix indicators, two rank indicators, and one channel quality indicator. In certain embodiments, a first rank indicator of the two rank indicators corresponds to a number of layers of a first precoder matrix indicator of the two precoder matrix indicators, and a second rank indicator of the two rank indicators corresponds to a number of layers of a second precoder matrix indicator of the two precoder matrix indicators.
In some embodiments, a first subset of the at least one value corresponding to a single transmission and reception point hypotheses has a higher priority with respect to an order of reporting compared with a second subset of the at least one value corresponding to a joint transmission hypothesis. In various embodiments, the at least one value corresponding to a transmission hypothesis are reported in a descending order of a channel quality indicator value corresponding to the transmission hypothesis. In one embodiment, an order in which the at least one value is reported in the at least one channel state information report is multiplexed is indicated by a value of a parameter reported within the at least one channel state information report, and the parameter reported corresponds to at least one transmission hypotheses.
In one embodiment, a method of a user equipment comprises: receiving at least one channel state information reporting setting, wherein the at least one channel state information reporting setting comprises at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network; identifying a set of transmission hypotheses based on the channel state information reporting setting, wherein the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points; receiving at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting; generating a set of at least one channel state information report based on the channel state information reporting setting, wherein the at least one channel state information report comprises at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses; and feeding back the set of the at least one channel state information report to the mobile communication network.
In certain embodiments, the indication of channel state information feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter: indicates multiple transmission and reception point channel state information reporting; includes at least two channel state information reference signal identifiers corresponding to at least two channel state information reference signal resources; indicates two channel state information reference signal port groups per channel state information reference signal resource; indicates a number of channel state information reports; indicates multiple codebook configurations; indicates a pair of report quantities; indicates a transmission configuration indicator codepoint in a downlink control information, wherein the transmission configuration indicator codepoint corresponds to two transmission configuration indicator states; or some combination thereof.
In some embodiments, the at least one channel state information report comprises up to four precoder matrix indicator values, and up to three rank indicator values.
In various embodiments, a first precoder matrix indicator value of the four precoder matrix indicator values and a first rank indicator value of the three rank indicator values correspond to a first transmission and reception point transmission hypothesis of two single transmission and reception point transmission hypotheses, a second precoder matrix indicator value of the four precoder matrix indicator values and a second rank indicator value of the three rank indicator values correspond to a second transmission and reception point transmission hypothesis of the two single transmission and reception point transmission hypotheses, and a third precoder matrix indicator value and a fourth precoder matrix indicator value of the four precoder matrix indicator values and a third rank indicator value of the three rank indicator values correspond to a joint transmission hypothesis from two transmission and reception points.
In one embodiment, the third rank indicator value of the three rank indicator values corresponds to a number of layers corresponding to both of the two transmission and reception points, and the number of layers corresponding to both of the two transmission and reception points is defined by a rule.
In certain embodiments, the at least one channel state information report comprises three channel state information reports that are fed back to the mobile communication network, a first channel state information report of the three channel state information reports corresponds to a first transmission and reception point transmission hypotheses of two single transmission and reception point transmission hypotheses, a second channel state information report of the three channel state information reports corresponds to a second transmission and reception point transmission hypotheses of the two single transmission and reception point transmission hypotheses, and a third channel state information report of the three channel state information reports corresponds to a joint transmission hypothesis from two transmission and reception points.
In some embodiments, the first channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator and the second channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator.
In various embodiments, the third channel state information report comprises two precoder matrix indicators, one rank indicator, and one channel quality indicator. In one embodiment, the third channel state information report comprises two precoder matrix indicators, two rank indicators, and one channel quality indicator.
In certain embodiments, a first rank indicator of the two rank indicators corresponds to a number of layers of a first precoder matrix indicator of the two precoder matrix indicators, and a second rank indicator of the two rank indicators corresponds to a number of layers of a second precoder matrix indicator of the two precoder matrix indicators.
In some embodiments, a first subset of the at least one value corresponding to a single transmission and reception point hypotheses has a higher priority with respect to an order of reporting compared with a second subset of the at least one value corresponding to a joint transmission hypothesis.
In various embodiments, the at least one value corresponding to a transmission hypothesis are reported in a descending order of a channel quality indicator value corresponding to the transmission hypothesis.
In one embodiment, an order in which the at least one value is reported in the at least one channel state information report is multiplexed is indicated by a value of a parameter reported within the at least one channel state information report, and the parameter reported corresponds to at least one transmission hypotheses.
In one embodiment, an apparatus comprises a user equipment. The apparatus further comprises: a receiver that receives at least one channel state information reporting setting, wherein the at least one channel state information reporting setting comprises at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network; a processor that identifies a set of transmission hypotheses based on the channel state information reporting setting, wherein the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points; and a transmitter, wherein: the receiver receives at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting; the processor generates a set of at least one channel state information report based on the channel state information reporting setting, wherein the at least one channel state information report comprises at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses; and the transmitter feeds back the set of the at least one channel state information report to the mobile communication network.
In certain embodiments, the indication of channel state information feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter: indicates multiple transmission and reception point channel state information reporting; includes at least two channel state information reference signal identifiers corresponding to at least two channel state information reference signal resources; indicates two channel state information reference signal port groups per channel state information reference signal resource; indicates a number of channel state information reports; indicates multiple codebook configurations; indicates a pair of report quantities; indicates a transmission configuration indicator codepoint in a downlink control information, wherein the transmission configuration indicator codepoint corresponds to two transmission configuration indicator states; or some combination thereof.
In some embodiments, the at least one channel state information report comprises up to four precoder matrix indicator values, and up to three rank indicator values.
In various embodiments, a first precoder matrix indicator value of the four precoder matrix indicator values and a first rank indicator value of the three rank indicator values correspond to a first transmission and reception point transmission hypothesis of two single transmission and reception point transmission hypotheses, a second precoder matrix indicator value of the four precoder matrix indicator values and a second rank indicator value of the three rank indicator values correspond to a second transmission and reception point transmission hypothesis of the two single transmission and reception point transmission hypotheses, and a third precoder matrix indicator value and a fourth precoder matrix indicator value of the four precoder matrix indicator values and a third rank indicator value of the three rank indicator values correspond to a joint transmission hypothesis from two transmission and reception points.
In one embodiment, the third rank indicator value of the three rank indicator values corresponds to a number of layers corresponding to both of the two transmission and reception points, and the number of layers corresponding to both of the two transmission and reception points is defined by a rule.
In certain embodiments, the at least one channel state information report comprises three channel state information reports that are fed back to the mobile communication network, a first channel state information report of the three channel state information reports corresponds to a first transmission and reception point transmission hypotheses of two single transmission and reception point transmission hypotheses, a second channel state information report of the three channel state information reports corresponds to a second transmission and reception point transmission hypotheses of the two single transmission and reception point transmission hypotheses, and a third channel state information report of the three channel state information reports corresponds to a joint transmission hypothesis from two transmission and reception points.
In some embodiments, the first channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator and the second channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator.
In various embodiments, the third channel state information report comprises two precoder matrix indicators, one rank indicator, and one channel quality indicator.
In one embodiment, the third channel state information report comprises two precoder matrix indicators, two rank indicators, and one channel quality indicator.
In certain embodiments, a first rank indicator of the two rank indicators corresponds to a number of layers of a first precoder matrix indicator of the two precoder matrix indicators, and a second rank indicator of the two rank indicators corresponds to a number of layers of a second precoder matrix indicator of the two precoder matrix indicators.
In some embodiments, a first subset of the at least one value corresponding to a single transmission and reception point hypotheses has a higher priority with respect to an order of reporting compared with a second subset of the at least one value corresponding to a joint transmission hypothesis.
In various embodiments, the at least one value corresponding to a transmission hypothesis are reported in a descending order of a channel quality indicator value corresponding to the transmission hypothesis.
In one embodiment, an order in which the at least one value is reported in the at least one channel state information report is multiplexed is indicated by a value of a parameter reported within the at least one channel state information report, and the parameter reported corresponds to at least one transmission hypotheses.
In one embodiment, a method of a network device comprises: transmitting at least one channel state information reporting setting, wherein the at least one channel state information reporting setting comprises at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network, wherein a set of transmission hypotheses is identified based on the channel state information reporting setting, the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points; transmitting at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting, wherein a set of at least one channel state information report is generated based on the channel state information reporting setting, the at least one channel state information report comprises at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses; and receiving feedback comprising the set of the at least one channel state information report to the mobile communication network.
In certain embodiments, the indication of channel state information feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter: indicates multiple transmission and reception point channel state information reporting; includes at least two channel state information reference signal identifiers corresponding to at least two channel state information reference signal resources; indicates two channel state information reference signal port groups per channel state information reference signal resource; indicates a number of channel state information reports; indicates multiple codebook configurations; indicates a pair of report quantities; indicates a transmission configuration indicator codepoint in a downlink control information, wherein the transmission configuration indicator codepoint corresponds to two transmission configuration indicator states; or some combination thereof.
In some embodiments, the at least one channel state information report comprises up to four precoder matrix indicator values, and up to three rank indicator values.
In various embodiments, a first precoder matrix indicator value of the four precoder matrix indicator values and a first rank indicator value of the three rank indicator values correspond to a first transmission and reception point transmission hypothesis of two single transmission and reception point transmission hypotheses, a second precoder matrix indicator value of the four precoder matrix indicator values and a second rank indicator value of the three rank indicator values correspond to a second transmission and reception point transmission hypothesis of the two single transmission and reception point transmission hypotheses, and a third precoder matrix indicator value and a fourth precoder matrix indicator value of the four precoder matrix indicator values and a third rank indicator value of the three rank indicator values correspond to a joint transmission hypothesis from two transmission and reception points.
In one embodiment, the third rank indicator value of the three rank indicator values corresponds to a number of layers corresponding to both of the two transmission and reception points, and the number of layers corresponding to both of the two transmission and reception points is defined by a rule.
In certain embodiments, the at least one channel state information report comprises three channel state information reports that are fed back to the mobile communication network, a first channel state information report of the three channel state information reports corresponds to a first transmission and reception point transmission hypotheses of two single transmission and reception point transmission hypotheses, a second channel state information report of the three channel state information reports corresponds to a second transmission and reception point transmission hypotheses of the two single transmission and reception point transmission hypotheses, and a third channel state information report of the three channel state information reports corresponds to a joint transmission hypothesis from two transmission and reception points. In some embodiments, the first channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator and the second channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator.
In various embodiments, the third channel state information report comprises two precoder matrix indicators, one rank indicator, and one channel quality indicator.
In one embodiment, the third channel state information report comprises two precoder matrix indicators, two rank indicators, and one channel quality indicator.
In certain embodiments, a first rank indicator of the two rank indicators corresponds to a number of layers of a first precoder matrix indicator of the two precoder matrix indicators, and a second rank indicator of the two rank indicators corresponds to a number of layers of a second precoder matrix indicator of the two precoder matrix indicators.
In some embodiments, a first subset of the at least one value corresponding to a single transmission and reception point hypotheses has a higher priority with respect to an order of reporting compared with a second subset of the at least one value corresponding to a joint transmission hypothesis.
In various embodiments, the at least one value corresponding to a transmission hypothesis are reported in a descending order of a channel quality indicator value corresponding to the transmission hypothesis.
In one embodiment, an order in which the at least one value is reported in the at least one channel state information report is multiplexed is indicated by a value of a parameter reported within the at least one channel state information report, and the parameter reported corresponds to at least one transmission hypotheses.
In one embodiment, an apparatus comprises a network device. The apparatus further comprises: a transmitter that: transmits at least one channel state information reporting setting, wherein the at least one channel state information reporting setting comprises at least one channel state information reference signal resource setting, and the channel state information reporting setting includes an indication of channel state information feedback reporting for multiple transmission points in a mobile communication network, wherein a set of transmission hypotheses is identified based on the channel state information reporting setting, the hypotheses include a combination of single-point transmission from at least one transmission and reception point, or multi-point joint transmission from two transmission and reception points; and transmits at least one channel state information reference signal resource transmitted from the mobile communication network based on the channel state information reference signal resource setting, wherein a set of at least one channel state information report is generated based on the channel state information reporting setting, the at least one channel state information report comprises at least one value of a precoder matrix indicator, a rank indicator, a channel state information reference signal resource indicator, a layer indicator, a channel quality indicator, a synchronization signal block resource indicator, or a combination thereof, and each value of the at least one value is associated with a one transmission hypothesis from the set of transmission hypotheses; and a receiver that receives feedback comprising the set of the at least one channel state information report to the mobile communication network.
In certain embodiments, the indication of channel state information feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter: indicates multiple transmission and reception point channel state information reporting; includes at least two channel state information reference signal identifiers corresponding to at least two channel state information reference signal resources; indicates two channel state information reference signal port groups per channel state information reference signal resource; indicates a number of channel state information reports; indicates multiple codebook configurations; indicates a pair of report quantities; indicates a transmission configuration indicator codepoint in a downlink control information, wherein the transmission configuration indicator codepoint corresponds to two transmission configuration indicator states; or some combination thereof.
In some embodiments, the at least one channel state information report comprises up to four precoder matrix indicator values, and up to three rank indicator values.
In various embodiments, a first precoder matrix indicator value of the four precoder matrix indicator values and a first rank indicator value of the three rank indicator values correspond to a first transmission and reception point transmission hypothesis of two single transmission and reception point transmission hypotheses, a second precoder matrix indicator value of the four precoder matrix indicator values and a second rank indicator value of the three rank indicator values correspond to a second transmission and reception point transmission hypothesis of the two single transmission and reception point transmission hypotheses, and a third precoder matrix indicator value and a fourth precoder matrix indicator value of the four precoder matrix indicator values and a third rank indicator value of the three rank indicator values correspond to a joint transmission hypothesis from two transmission and reception points.
In one embodiment, the third rank indicator value of the three rank indicator values corresponds to a number of layers corresponding to both of the two transmission and reception points, and the number of layers corresponding to both of the two transmission and reception points is defined by a rule.
In certain embodiments, the at least one channel state information report comprises three channel state information reports that are fed back to the mobile communication network, a first channel state information report of the three channel state information reports corresponds to a first transmission and reception point transmission hypotheses of two single transmission and reception point transmission hypotheses, a second channel state information report of the three channel state information reports corresponds to a second transmission and reception point transmission hypotheses of the two single transmission and reception point transmission hypotheses, and a third channel state information report of the three channel state information reports corresponds to a joint transmission hypothesis from two transmission and reception points. In some embodiments, the first channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator and the second channel state information report comprises one precoder matrix indicator, one rank indicator, and one channel quality indicator.
In various embodiments, the third channel state information report comprises two precoder matrix indicators, one rank indicator, and one channel quality indicator.
In one embodiment, the third channel state information report comprises two precoder matrix indicators, two rank indicators, and one channel quality indicator.
In certain embodiments, a first rank indicator of the two rank indicators corresponds to a number of layers of a first precoder matrix indicator of the two precoder matrix indicators, and a second rank indicator of the two rank indicators corresponds to a number of layers of a second precoder matrix indicator of the two precoder matrix indicators.
In some embodiments, a first subset of the at least one value corresponding to a single transmission and reception point hypotheses has a higher priority with respect to an order of reporting compared with a second subset of the at least one value corresponding to a joint transmission hypothesis.
In various embodiments, the at least one value corresponding to a transmission hypothesis are reported in a descending order of a channel quality indicator value corresponding to the transmission hypothesis.
In one embodiment, an order in which the at least one value is reported in the at least one channel state information report is multiplexed is indicated by a value of a parameter reported within the at least one channel state information report, and the parameter reported corresponds to at least one transmission hypotheses.
Embodiments may 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 invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims
1.-15. (canceled)
16. A method of a user equipment (UE), the method comprising:
- receiving a channel state information (CSI) reporting setting, wherein the CSI reporting setting comprises a CSI reference signal (RS) resource setting, wherein the CSI reporting setting includes an indication of CSI reporting for multiple transmission-and-reception points (TRPs), wherein the CSI reporting setting corresponds to a set of hypotheses, and wherein each hypothesis of the set of hypotheses corresponds to a single-point transmission from at least one TRP, or a joint multi-point transmission from two TRPs, or a combination thereof;
- receiving at least one CSI reference signal (CSI-RS) on a CSI-RS resource based on the CSI-RS resource setting;
- generating a CSI report based on the CSI reporting setting and the CSI-RS, wherein the CSI report comprises at least one value of a precoder matrix indicator (“PMI”), a rank indicator (“RI”), a CSI-RS resource indicator (“CRI”), a layer indicator (“LI”), or a channel quality indicator (“CQI”), or a combination thereof, and wherein the at least one value is associated with a hypothesis of the set of hypotheses; and
- transmitting the CSI report.
17. The method of claim 16, wherein the indication of the CSI reporting for the multiple TRPs comprises a parameter indicating:
- a multi-TRP CSI reporting;
- at least two CSI-RS identifiers associated with at least two CSI-RS resources;
- at least two CSI-RS port groups per CSI-RS resource;
- a number of CSI reports;
- a number of codebook configurations;
- a pair of report quantities; or
- a transmission configuration indicator (“TCI”) codepoint in a downlink control information, wherein the TCI codepoint corresponds to at least two TCI states;
- or a combination thereof.
18. The method of claim 16, wherein the CSI report comprises four or less PMI values, and wherein the CSI report comprise three or less RI values.
19. The method of claim 18, wherein:
- a first PMI value and a first RI value correspond to a first hypothesis of the set of hypotheses, the set of hypotheses comprising at least two single-TRP transmission hypotheses;
- a second PMI value and a second RI value correspond to a second hypothesis of the two single-TRP transmission hypotheses; and
- a third PMI value, a fourth PMI value, and a third RI value correspond to a third hypothesis of the set of hypotheses, the set of hypotheses comprising a joint transmission hypothesis from at least two TRPs.
20. The method of claim 19, wherein the third RI value corresponds to a number of layers corresponding to both of the at least two TRPs, and wherein the number of layers corresponding to both of the at least two TRPs is based at least in part on a rule.
21. The method of claim 16, further comprising:
- generating three CSI reports,
- wherein a first CSI report of the three CSI reports corresponds to a first hypothesis of the set of hypotheses, wherein the set of hypotheses comprises two single-TRP transmission hypotheses,
- wherein a second CSI report of the three CSI reports corresponds to a second hypothesis of the two single-TRP transmission hypotheses, and
- wherein a third CSI report of the three CSI reports corresponds to third hypothesis of the set of hypotheses, wherein the set of hypotheses comprises a joint transmission hypothesis from at least two TRPs.
22. The method of claim 21, wherein each of the first CSI report and the second CSI report comprise one PMI value, one RI value, and one CQI value.
23. The method of claim 21, wherein the third CSI report comprises two PMI values, one RI value, and one CQI value.
24. The method of claim 21, wherein the third CSI report comprises two PMI values, two RI values, and one CQI value.
25. The method of claim 24, wherein a first RI value of the two RI values corresponds to a first number of layers of a first PMI value of the two PMI values, and wherein a second RI value of the two RI values corresponds to a second number of layers of a second PMI value of the two PMI values.
26. The method of claim 16, wherein a first subset of the at least one value of the PMI, the RI, the CRI, the LI, or the CQI, or a combination thereof corresponding to a single-TRP hypothesis is associated with a higher priority related to an order of reporting compared with a second subset of the at least one value of the PMI, the RI, the CRI, the LI, or the CQI, or a combination thereof corresponding to a joint transmission hypothesis from at least two TRPs.
27. The method of claim 16, wherein the at least one value of the PMI, the RI, the CRI, the LI, or the CQI, or a combination thereof corresponding to a hypothesis are reported according to a descending order from the CQI value corresponding to the hypothesis.
28. The method of claim 16, wherein an order, in which the at least one value of the PMI, the RI, the CRI, the LI, or the CQI, or a combination thereof is reported in the CSI report, is multiplexed by a value of a parameter reported within the CSI report, and the parameter reported corresponds to at least one transmission hypothesis.
29. A method of a network device, the method comprising:
- transmitting a channel state information (CSI) reporting setting, wherein the CSI reporting setting comprises a CSI reference signal (RS) resource setting, wherein the CSI reporting setting includes an indication of CSI reporting for multiple transmission-and-reception points (TRPs), wherein the CSI reporting setting corresponds to a set of hypotheses, and wherein each hypothesis of the set of hypotheses corresponds to a single-point transmission from at least one TRP, or a joint multi-point transmission from two TRPs, or a combination thereof;
- transmitting at least one CSI reference signal (CSI-RS) on a CSI-RS resource based on the CSI-RS resource setting, wherein a CSI report is generated based on the CSI reporting setting and the CSI-RS, wherein the CSI report comprises at least one value of a precoder matrix indicator (“PMI”), a rank indicator (“RI”), a CSI-RS resource indicator (“CRT”), a layer indicator (“LI”), or a channel quality indicator (“CQI”), or a combination thereof, and wherein the at least one value is associated with a hypothesis of the set of hypotheses; and
- receiving the CSI report.
30. An apparatus for wireless communication, the apparatus comprising:
- a processor; and
- a memory coupled to the processor, the memory comprising instructions executable by the processor to cause the apparatus to: transmit a channel state information (CSI) reporting setting, wherein the CSI reporting setting comprises a CSI reference signal (RS) resource setting, wherein the CSI reporting setting includes an indication of CSI reporting for multiple transmission-and-reception points (TRPs), wherein the CSI reporting setting corresponds to a set of hypotheses, and wherein each hypothesis of the set of hypotheses corresponds to a single-point transmission from at least one TRP, or a joint multi-point transmission from two TRPs, or a combination thereof; transmit at least one CSI reference signal (CSI-RS) on a CSI-RS resource based on the CSI-RS resource setting, wherein a CSI report is generated based on the CSI reporting setting and the CSI-RS, wherein the CSI report comprises at least one value of a precoder matrix indicator (“PMI”), a rank indicator (“RI”), a CSI-RS resource indicator (“CRT”), a layer indicator (“LI”), or a channel quality indicator (“CQI”), or a combination thereof, and wherein the at least one value is associated with a hypothesis of the set of hypotheses; and receive the CSI report.
Type: Application
Filed: Oct 29, 2021
Publication Date: Dec 21, 2023
Inventors: Ahmed Monier Ibrahim Saleh Hindy (Aurora, IL), Vijay Nangia (Woodridge, IL)
Application Number: 18/251,087
