SYSTEM AND METHOD FOR ENHANCED CHANNEL STATE INFORMATION REPORTING - Patent application

Abstract

The configurations relate to a system, method, and non-transitory computer-readable medium for reporting a channel state information (CSI) report, where the CSI report includes CSI Part 1 and CSI Part 2, and communicating by a wireless communication device to a network based on the CSI report. In some configurations, a plurality of reference signals and configuration parameters are received. The wireless communication device can determine a channel state information (CSI) report based on the plurality of reference signals and the configuration parameters, where the CSI report includes CSI Part 1 and CSI Part 2. The wireless communication device can report the CSI report to the network.

Description

[Technical field]

[0001] The present disclosure relates generally to wireless communications, and more particularly to multi-user (MU) multiple-input multiple-output (MU-MIMO). [Background technology]

[0002] background In the fifth generation mobile network system (5GC), MIMO is a key technology in the new radio (NR) system. MIMO function may be available for both frequency division duplex (FDD) and time division duplex (TDD). Summary of the Invention [Means for solving the problem]

[0003] overview The exemplary configurations disclosed herein are directed to solving problems associated with one or more problems presented in the prior art, as well as providing further features that will be readily apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. According to various configurations, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it is understood that these configurations are presented by way of example and not limitation, and it will be apparent to those skilled in the art upon reading this disclosure that various modifications to the disclosed configurations can be made while remaining within the scope of this disclosure.

[0004] In some configurations, a plurality of reference signals and a configuration parameter are received. The wireless communication device can determine a channel state information (CSI) report based on the plurality of reference signals and the configuration parameter, where the CSI report includes CSI part 1 and CSI part 2. The wireless communication device can report the CSI report to the network.

[0005] In some configurations, a plurality of reference signals and configuration parameters are transmitted. The network can receive a channel state information (CSI) report from the wireless communication device, the CSI report including CSI part 1 and CSI part 2.

[0006] These and other aspects and implementations thereof are described in more detail in the drawings, specification, and claims. [Brief description of the drawings]

[0007] Various configuration examples of the present solution will be described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and depict only configuration examples of the present solution to facilitate the reader's understanding of the present solution. Thus, the drawings should not be considered as limiting the breadth, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, the drawings are not necessarily drawn to scale.

[0008] [Figure 1] 1 illustrates an example of a cellular communication system according to some configurations.

[0009] [Diagram 2] 1 shows a block diagram of an example base station and an example user equipment device according to some configurations.

[0010] [Diagram 3] FIG. 2 illustrates an example of channel quality information (CQI) mapping for channel state information (CSI) part 1 according to various configurations.

[0011] [Figure 4] FIG. 1 illustrates an example of CQI mapping for CSI part 1 according to various configurations.

[0012] [Diagram 5] FIG. 1 illustrates an example of CQI mapping for CSI part 1 according to various configurations.

[0013] [Figure 6] FIG. 1 illustrates an example of CQI mapping for CSI part 1 according to various configurations.

[0014] [Figure 7] FIG. 1 illustrates an example of CQI mapping for CSI part 1 and CSI part 2 according to various configurations.

[0015] [Figure 8] FIG. 1 illustrates an example of CQI mapping for CSI part 1 and CSI part 2 according to various configurations.

[0016] [Figure 9] FIG. 1 illustrates an example of CQI mapping for CSI part 1 and CSI part 2 according to various configurations.

[0017] [Figure 10] FIG. 11 shows an example of an indicator of the total amount of non-zero coefficients (NZC) summed across all layers for CSI Part 1 according to various configurations.

[0018] [Figure 11] FIG. 11 shows an example of an indicator of the total amount of NZC summed across all layers and across all Qs for CSI Part 1 according to some configurations.

[0019] [Figure 12] 11A-11C show examples of indicators of the total amount of NZC summed across all layers and per Q for CSI Part 1 according to various configurations.

[0020] [Figure 13] 11A-11C show examples of indicators of the total amount of NZC summed across all layers and associated with one or more DD bases for CSI Part 1 and / or CSI Part 2 according to various configurations.

[0021] [Figure 14A] FIG. 1 is a flowchart illustrating an example method for enhanced CSI reporting according to various configurations. [Figure 14B] FIG. 1 is a flowchart illustrating an example method for enhanced CSI reporting according to various configurations.

[0022] [Figure 15] FIG. 1 is a flowchart illustrating an example method for enhanced CSI reporting according to various configurations.

[0023] [Figure 16] FIG. 1 is a flowchart illustrating an example method for enhanced CSI reporting according to various configurations.

[0024] [Figure 17] FIG. 1 is a flowchart illustrating an example method for enhanced CSI reporting according to various configurations. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Detailed Description In order to enable those skilled in the art to make and use the present solution, various exemplary configurations of the present solution are described below with reference to the accompanying drawings. As will be apparent to those skilled in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the exemplary configurations and applications described and illustrated herein. Furthermore, the specific order or hierarchy of steps in the methods disclosed herein is merely an example approach. The specific order or hierarchy of steps of the disclosed methods or processes can be rearranged based on design preferences while remaining within the scope of the present solution. Thus, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or operations in a sample order, and that the present solution is not limited to the specific order or hierarchy presented, unless otherwise specified.

[0026] In a wireless communication system, a wireless device may communicate with a network. As part of the communication process, the wireless device may report channel state information (CSI). In some cases, the wireless device may move (e.g., change one physical location to another) at high or medium speed. Due to the higher speed, the data included in the CSI may become stale, causing performance loss in the communication between the wireless device and the network. In some examples, the performance loss may be present, especially in a multi-user (MU) multiple-input multiple-output (MU-MIMO) scenario. The configurations disclosed herein provide, for example, channel quality indicator (CQI) mapping rules, amount (e.g., number) of non-zero coefficients (NZC), priority formulation enhancement, Doppler domain (DD) basis indicator, strongest coefficient indicator, coefficient grouping position, and CSI measurement and reporting enhancement (e.g., addition, update, modification) for higher layer parameters. To do so, the wireless communication system may utilize a mapping order design for CSI Part 1 and CSI Part 2 associated with Type II codebook refinement for high to medium speed.

[0027] FIG. 1 illustrates an example of a wireless communication system 100 in which the techniques disclosed herein may be implemented according to an embodiment of the present disclosure. In the following description, the wireless communication system 100 may implement any wireless network, such as a cellular network or a narrowband Internet of Things (NB-IoT) network, and is referred to herein as the system 100. Such a system 100 includes a BS 102 and a UE 104 that can communicate with each other via a communication link 110 (e.g., a wireless communication channel), and clusters of cells 126, 130, 132, 134, 136, 138, and 140 that overlap a geographic region 101. In FIG. 1, the BS 102 and the UE 104 are included within the respective geographic boundaries of the cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one BS operating in its assigned bandwidth to provide adequate wireless coverage to its intended users.

[0028] For example, the BS 102 may operate with an assigned channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via downlink radio frames 118 and uplink radio frames 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127 that may include data symbols 122 / 128. In this disclosure, the BS 102 and the UE 104 are generally described herein as non-limiting examples of "communication nodes" capable of implementing the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communication in accordance with various implementations of the present solution.

[0029] In some implementations, the wireless communication system 100 may support MIMO communication. For example, MIMO is an important technology in new radio (NR) systems. MIMO may work in both frequency division duplex (FDD) and time division duplex (TDD) systems, among others. MIMO technology may utilize reporting mechanisms, such as CSI, to support communication. The CSI report may include various types, parts, groups, and fields. The techniques described herein may provide enhancements to various aspects of CSI reporting and reporting processes. For example, the wireless communication device may receive a number of reference signals and configuration parameters by the wireless communication device from a network. The wireless communication device may determine a CSI report based on the number of reference signals and configuration parameters, where the CSI report includes CSI part 1 and CSI part 2. The wireless communication device may report the CSI report to the network. In some cases, the reporting process may include one or more of the following: That is, the configuration parameters may be configured to enable two or more CQIs in the CSI report, the reference signal is aperiodic or semi-persistent, and each of the CSI window length, the DD base unit size, the offset between two CSI reference signal (CSI-RS) resources, and the length of the DD base vector is equal to or greater than a threshold. Additionally or alternatively, the wireless communication device may transmit a user equipment (UE) capability report to the network indicating that the wireless communication device supports some number of CQI reports, where the number is a positive integer. The wireless communication system may implement a codebook to further support CSI reporting, among various other applications.

[0030] 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals, e.g., OFDM / OFDMA signals, in accordance with some implementations of the present solution. System 200 may include components and elements configured to support known or conventional operational features that need not be described in detail herein. In one exemplary implementation, system 200 may be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment, such as wireless communication environment 100 of FIG. 1, as previously described.

[0031] The system 200 generally includes a BS 202 and a UE 204. The BS 202 includes a base station (BS) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each of which is coupled and interconnected with each other as needed via a data communication bus 220. The UE 204 includes a UE transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each of which is coupled and interconnected with each other as needed via a data communication bus 240. The BS 202 communicates with the UE 204 over a communication channel 250, which may be any wireless channel or other medium suitable for the transmission of data as described herein.

[0032] System 200 may further include any number of modules other than those shown in FIG. 2. Those skilled in the art may understand that the various exemplary blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various exemplary components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software may depend on the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a manner suitable for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.

[0033] According to some embodiments, the UE transceiver 230 may be referred to herein as an uplink transceiver 230 including a radio frequency (RF) transmitter and an RF receiver, each including circuitry coupled to an antenna 232. Alternatively, a duplexing switch (not shown) may couple the uplink transmitter or receiver to the uplink antenna in a time duplexing manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210 including an RF transmitter and an RF receiver, each including circuitry coupled to an antenna 212. Alternatively, a downlink duplexing switch may couple the downlink transmitter or receiver to the downlink antenna 212 in a time duplexing manner. The operation of the two transceiver modules 210 and 230 may be coordinated in time such that the downlink transmitter is coupled to the downlink antenna 212 at the same time that the uplink receiving circuitry is coupled to the uplink antenna 232 for receiving transmissions over the wireless transmission link 250. In some embodiments, there is a closed time synchronization with a minimum guard time between changes in duplexing direction.

[0034] The UE transceiver 230 and the BS transceiver 210 are configured to communicate over a wireless data communication link 250 and cooperate with an appropriately configured RF antenna arrangement 212 / 232 capable of supporting a particular wireless communication protocol and modulation scheme. In some exemplary embodiments, the UE transceiver 210 and the BS transceiver 210 are configured to support industry standards such as Long Term Evolution (LTE), emerging 5G and 6G standards, etc. However, it is understood that the present disclosure is not necessarily limited in application to a particular standard and associated protocol. Rather, the UE transceiver 230 and the BS transceiver 210 may be configured to support alternative or additional wireless data communication protocols, including future standards or variations thereof.

[0035] According to various embodiments, the BS 202 may be, for example, an evolved Node B (eNB), a serving eNB, a target eNB, a femto station, or a pico station. In some embodiments, the UE 204 may be various types of user devices, such as a mobile phone, a smart phone, a personal digital assistant (PDA), a tablet, a laptop computer, a wearable computing device, etc. The processor modules 214 and 236 may be implemented or realized using a general purpose processor, an associative memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. Thus, the processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, etc. The processor may also be implemented as a combination of computing devices, such as a combination of a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a digital signal processor core, or any other such configuration.

[0036] Furthermore, the methods described in connection with the embodiments disclosed herein may be implemented directly in hardware, firmware, software modules executed by the processor modules 214 and 236, respectively, or any practical combination thereof. The memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. In this regard, the memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processor modules 210 and 230 can read information from and write information to the memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be incorporated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by the processor modules 210 and 230, respectively. Additionally, memory modules 216 and 234 may each include non-volatile memory for storing instructions to be executed by processor modules 210 and 230, respectively.

[0037] The network communication module 218 generally corresponds to hardware, software, firmware, processing logic, and / or other components of the BS 202 that enable bidirectional communication between the BS transceiver 210 and other network components and communication nodes configured to communicate with the BS 202. For example, the network communication module 218 may be configured to support Internet or WiMAX traffic. In a typical deployment, without limitation, the network communication module 218 provides an 802.3 Ethernet interface to enable the BS transceiver 210 to communicate with a conventional Ethernet-based computer network. As such, the network communication module 218 may include a physical interface for connecting to a computer network (e.g., a Mobile Switching Center (MSC)). The terms "configured for," "configured to," and conjugations thereof, as used herein with respect to a specified operation or function, refer to a device, component, circuit, structure, machine, signal, etc. that is physically configured, programmed, formatted, and / or arranged to perform the specified operation or function.

[0038] 3 is a diagram illustrating an example mapping 300 for CSI part 1 according to various configurations. The mapping 300 may outline a CQI mapping order in one example embodiment of a CSI report for CSI part 1. In some cases, the CSI report may include various indicators among other data. For example, the CSI report may be composed of a rank indicator (RI), a precoding matrix indicator (PMI), and a CQI. In some cases, the CQI may be one type (e.g., a type) of CSI.

[0039] In some implementations, the CQI may be made to various granularities. The CQI may be associated with a wideband or a subband. For example, higher layer configurations (e.g., RRC, MAC-CE, DCI) may indicate a mapping on the CQI. In some cases, a first CQI may be associated with a wideband frequency and a second CQI may be associated with a subband frequency (e.g., a segment of a frequency band). Some wireless communication systems may report a CSI window (W) within a slot. CSI ) may support one CQI and one CSI reporting instance in one subband. For example, one CSI reporting instance may include a wideband CQI 302 and a subband differential CQI 304 (in ascending order of subband number) and may be mapped to CSI Part 1 (e.g., as in mapping 300).

[0040] During high-speed to medium-speed communication, the type-II codebook refinement may include time-domain (TD) correlation information and / or DD information. For example, the wireless communication system (e.g., including the BS 102 and the UE 104) may support the use of domain information during a CSI reporting window in a slot for type-II codebook refinement at high speed to medium speed. The CSI reporting window may be divided into a first amount of parts (e.g., X parts) associated with the same amount of CQI (e.g., X CQIs) such that the wireless communication system may support X CQIs in one subband and one CSI reporting instance during the CSI reporting window.

[0041] 4 is a diagram illustrating an example CQI mapping 400 for CSI part 1 according to various configurations. The mapping 400 may outline a CQI mapping order in one example embodiment of a CSI report for CSI part 1. In some cases, a CSI report may include multiple CQI sets. Each CQI set may include a wideband CQI and at least one sub-band differential CQI associated with the wideband CQI.

[0042] In some cases, the mapping 400 may be configured according to a CQI mapping order. For example, the network (e.g., the BS 102) may configure the UE 104 with a CQI mapping order for mapping to CSI Part 1 in a CSI report, the network may be preconfigured with a CQI mapping order, the UE 104 may be preconfigured with a CQI mapping order, or any combination thereof. The mapping order may include, in this order, a wideband CQI 402 for a first CQI set, at least one subband differential CQI 404 for the first CQI set, a wideband CQI 406 for a second CQI set, and at least one subband differential CQI 408 for the second CQI set. In some embodiments, the first CQI set may include a wideband CQI 402 and a sub-band differential CQI 404 , and the second CQI set may include a wideband CQI 406 and a sub-band differential CQI 408 .

[0043] In some embodiments, the CQI mapping order may include a certain amount of CQI sets. For example, the amount may be represented by X, where the first CQI set is first in the order, the second CQI set is second in the order, and the Xth CQI set is last in the order. The Xth CQI set may include a wideband CQI 410 and a subband differential CQI 412. Any integer amount of CQI sets may be between the second CQI set and the Xth CQI set. In some cases, any one of the CQI sets may not be reported.

[0044] 5 is a diagram illustrating an example CQI mapping 500 for CSI part 1 according to various configurations. The mapping 500 may outline a CQI mapping order in one example embodiment of a CSI report for CSI part 1. In some cases, a CSI report may include multiple CQI sets. Each CQI set may include a wideband CQI and at least one sub-band differential CQI associated with the wideband CQI.

[0045] In some cases, the mapping 500 may be configured according to a CQI mapping order. For example, the network (e.g., the BS 102) may configure the UE 104 with a CQI mapping order for mapping to CSI Part 1 in a CSI report, the network may be preconfigured with a CQI mapping order, the UE 104 may be preconfigured with a CQI mapping order, or any combination thereof. The mapping order may include a wideband CQI for each of the CQI sets and at least one sub-band differential CQI for each of the CQI sets. The mapping 500 may include a wideband CQI 502 for a first CQI set, a wideband CQI 504 for a second CQI set, at least one sub-band differential CQI 508 for the first CQI set, and at least one sub-band differential CQI 510 for the second CQI set, in that order. In some embodiments, the first CQI set may include a wideband CQI 502 and a sub-band differential CQI 508 , and the second CQI set may include a wideband CQI 504 and a sub-band differential CQI 510 .

[0046] In some embodiments, the CQI mapping order may include a certain amount of CQI sets. For example, the amount may be represented by X, where a first CQI set includes the wideband CQI and subband CQI that are first in order relative to the other wideband CQI and subband CQI, respectively, a second CQI set includes the wideband CQI and subband CQI that are second in order relative to the other wideband CQI and subband CQI, respectively, and the Xth CQI set includes the wideband CQI and subband CQI that are last in order relative to the other wideband CQI and subband CQI, respectively. The Xth CQI set may include the wideband CQI 506 and the subband differential CQI 512. Any integer amount of CQI sets may be between the second CQI set and the Xth CQI set. In some cases, any one of the CQI sets may not be reported.

[0047] FIG. 6 is a diagram illustrating an example of CQI mapping for CSI part 1 according to various configurations. Mapping 600 may outline a CQI mapping order in one example embodiment of a CSI report for CSI part 1. In some cases, a CSI report may include multiple CQI sets. A first CQI set may include a wideband CQI 602 and at least one sub-band differential CQI 604 associated with the wideband CQI 602. Each of the one or more second CQI sets may include at least one second sub-band differential CQI 606 associated with the wideband CQI 602. Thus, each set of sub-band differential CQIs may be associated with a wideband CQI 602 (e.g., a first set of wideband CQIs).

[0048] In some cases, the mapping 600 may be configured according to a CQI mapping order. For example, the network (e.g., the BS 102) may configure the UE 104 with a CQI mapping order for mapping to CSI Part 1 in a CSI report, the network may be preconfigured with a CQI mapping order, the UE 104 may be preconfigured with a CQI mapping order, or any combination thereof. The mapping 600 may include a wideband CQI 602 for a first CQI set, at least one first sub-band differential CQI 604 for the first CQI set, and at least one second sub-band differential CQI 606 for each of one or more second CQI sets, in this order according to the mapping order.

[0049] In some embodiments, the CQI mapping order may include a certain amount of CQI sets. For example, the amount may be represented by X, where a wideband CQI 602 is associated with each CQI set in the amount of CQI sets. The Xth CQI set may include the wideband CQI 602 and the subband differential CQI 608 at the end of the mapping 600 order. Any integer amount of CQI sets may be between the second CQI set and the Xth CQI set. In some cases, any one of the CQI sets may not be reported.

[0050] 7 is a diagram illustrating an example CQI mapping 700 for CSI part 1 and CSI part 2 according to various configurations. The mapping 700 may outline a CQI mapping order in one example embodiment of a CSI report for CSI part 1 and CSI part 2. In some cases, a CSI report may include multiple CQI sets. Each CQI set may include a wideband CQI and at least one sub-band differential CQI associated with the wideband CQI.

[0051] In some cases, the mapping 700 may be configured according to a CQI mapping order. For example, the network (e.g., the BS 102) may configure the UE 104 with a CQI mapping order for mapping to CSI Part 1 and CSI Part 2 in a CSI report, the network may be preconfigured with the CQI mapping order, the UE 104 may be preconfigured with the CQI mapping order, or any combination thereof. The mapping order may include a first portion and a second portion. The first portion 702 may be associated with CSI Part 1 and may include a wideband CQI 706 for the first CQI set and at least one subband differential CQI 708 for the first CQI set, in that order. The second portion 704 is associated with CSI part 2 and may include, in that order, a wideband CQI 710 for the second CQI set, at least one subband differential CQI 712 for the second CQI set, a wideband CQI 714 for the third CQI set, and at least one subband differential CQI 716 for the third CQI set. In some embodiments, the first CQI set may include the wideband CQI 706 and the subband differential CQI 708, the second CQI set may include the wideband CQI 710 and the subband differential CQI 712, and the third CQI set may include the wideband CQI 714 and the subband differential CQI 716.

[0052] In some embodiments, the CQI mapping order may include a certain amount of CQI sets. For example, the amount may be represented by X, where the first CQI set is first in the order, the second CQI set is second in the order, and the Xth CQI set is last in the order (e.g., the third CQI set in this example). Any integer amount of CQI sets may be between the second CQI set and the Xth CQI set. In some cases, any one of the CQI sets may not be reported.

[0053] 8 is a diagram illustrating an example CQI mapping 800 for CSI part 1 and CSI part 2 according to various configurations. The mapping 800 may outline a CQI mapping order in one example embodiment of a CSI report for CSI part 1 and CSI part 2. In some cases, a CSI report may include multiple CQI sets. Each CQI set may include a wideband CQI and at least one sub-band differential CQI associated with the wideband CQI.

[0054] In some cases, the mapping 800 may be configured according to a CQI mapping order. For example, the network (e.g., the BS 102) may configure the UE 104 with a CQI mapping order for mapping to CSI Part 1 in a CSI report, the network may be preconfigured with the CQI mapping order, the UE 104 may be preconfigured with the CQI mapping order, or any combination thereof. The mapping order may include a first portion and a second portion. The first portion 802 may be associated with CSI Part 1 and may include a wideband CQI for each of the CQI sets. For example, the first portion may include a wideband CQI 806 for the first CQI set and a wideband CQI 808 for the second CQI set, in that order. The second portion 804 may be associated with CSI Part 2 and may include at least one subband differential CQI for each of the CQI sets. For example, the second portion may include, in that order, at least one subband differential CQI 812 for the first CQI set and at least one subband differential CQI 814 for the second CQI set. In some embodiments, the first CQI set may include a wideband CQI 806 and a subband differential CQI 812, and the second CQI set may include a wideband CQI 808 and a subband differential CQI 814.

[0055] In some embodiments, the CQI mapping order may include a certain amount of CQI sets. For example, the amount may be represented by X, where a first CQI set includes the wideband CQI and subband CQI that are first in order relative to the other wideband CQI and subband CQI, respectively, a second CQI set includes the wideband CQI and subband CQI that are second in order relative to the other wideband CQI and subband CQI, respectively, and the Xth CQI set includes the wideband CQI and subband CQI that are last in order relative to the other wideband CQI and subband CQI, respectively. The Xth CQI set may include the wideband CQI 810 and the subband differential CQI 816. Any integer amount of CQI sets may be between the second CQI set and the Xth CQI set. In some cases, any one of the CQI sets may not be reported.

[0056] FIG. 9 is a diagram illustrating an example CQI mapping 900 for CSI part 1 and CSI part 2 according to various configurations. The mapping 900 may outline a CQI mapping order in one example embodiment of a CSI report for CSI part 1 and CSI part 2. In some cases, the CSI report may include multiple CQI sets. The first CQI set may include a wideband CQI 906 and at least one first sub-band differential CQI 908 associated with the wideband CQI 906. Each of the one or more second CQI sets may include at least one second sub-band differential CQI 910 associated with the wideband CQI 906 in the first CQI set. Thus, each set of sub-band differential CQIs may be associated with the wideband CQI 906 (e.g., the first set of wideband CQIs).

[0057] In some cases, the mapping 900 may be configured according to a CQI mapping order. For example, the network (e.g., the BS 102) may configure the UE 104 with a CQI mapping order for mapping to CSI Part 1 in a CSI report, the network may be preconfigured with a CQI mapping order, the UE 104 may be preconfigured with a CQI mapping order, or any combination thereof. The mapping order may include a first portion and a second portion. The first portion 902 may be associated with CSI Part 1 and may include a wideband CQI 906 for the first CQI set. The second portion 904 may be associated with CSI Part 2 and may include at least one first sub-band differential CQI 908 for the first CQI set and at least one second sub-band differential CQI 910 for each of the one or more second CQI sets, in this order according to the mapping order.

[0058] In some embodiments, the CQI mapping order may include a certain amount of CQI sets. For example, the amount may be represented by X, where a wideband CQI 906 is associated with each CQI set in the amount of CQI sets. The Xth CQI set may include the wideband CQI 906 and the subband differential CQI 912 at the end of the mapping 900 order. Any integer amount of CQI sets may be between the second CQI set and the Xth CQI set. In some cases, any one of the CQI sets may not be reported.

[0059] FIG. 10 is a diagram illustrating an example of an indicator 1000 of a total amount of NZC summed across all layers of CSI Part 1, according to various configurations. In some cases, one CSI reporting instance for CSI Part 1 may include an indicator 1002 for NZC for all layers. The indicator 1002 may indicate a total amount (e.g., number) of NZC combined (e.g., summed) across all layers (K NZ In some embodiments, K NZThe value of may depend on the rank. For example, if the total (e.g., maximum) allowed rank is 1, then K NZ = K0, otherwise, if the total acceptable rank is not 1, then K NZ = 2K0. In some embodiments, K0 can be calculated according to the following formula: [ka] Here, L denotes an antenna port, p1 denotes an antenna port number, N3 denotes a precoding matrix, R denotes the amount of precoding matrix indicator (PMI) subbands per CQI subband, and β denotes amplitude scaling.

[0060] 11 is a diagram illustrating an example of an indicator 1100 of the total amount of NZC summed across all layers and across all Qs for CSI Part 1 according to some configurations. During high to medium speed communication, the Type II codebook refinement may include additional parameters. For example, the parameter Q may be used for time compression. In some cases, the parameter Q may indicate the amount of DD basis.

[0061] In some embodiments, the indicator 1102 may indicate a total amount of NZC in one CSI report for CSI Part 1. For example, a wireless device (e.g., UE 104) may combine (e.g., sum) a total amount of NZC across all layers and across all Qs and report the indicator 1102 in CSI Part 1 for one CSI report instance. Thus, the CSI report may include an indicator for a total number of NZCs summed across multiple layers and multiple DD base numbers for CSI Part 1, where the NZC is associated with at least one PMI.

[0062] In a first exemplary embodiment, a wireless device (or another wireless node of a wireless communication system) may generate an indicator 1102 according to Equation 1, as described herein in connection with FIG. 10, where if the total (e.g., maximum) allowed rank is 1, then the total number of NZCs is a value (e.g., K NZ =K0), otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is double that value (e.g., K NZ In a second exemplary embodiment, the wireless device may generate the indicator 1102 according to Equation 1, where if the total (e.g., maximum) allowed rank is 1, the total number of NZCs is a value multiplied by the DD basis number (e.g., K NZ =K0*Q), otherwise, if the total allowed rank is a number other than 1, the total number of NZCs is twice that value multiplied by the number of DD bases (e.g., K NZ = 2K0 * Q). In the third exemplary embodiment, the wireless device may generate the indicator 1102 according to the following formula: [ka] Here, if the total (e.g., maximum) allowable rank is 1, the total number of NZCs is a certain value (e.g., K NZ =K0), otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is twice that value (e.g., K NZ =2K0), the value of which is determined based on the DD basis number. For example, the wireless device may determine the value based on Equation 2.

[0063] 12 illustrates an example of an indicator 1200 of the total amount of NZC summed over all layers and per Q for CSI Part 1 according to various configurations. During high to medium speed communication, the Type II codebook refinement may include additional parameters. For example, the parameter Q may be used for time compression. In some cases, the parameter Q may indicate the amount of DD basis.

[0064] In some implementations, indicator 1200 may include multiple indications. For example, a wireless device (e.g., UE 104) may combine (e.g., sum) the total amount of NZC across all layers and per Q and report indicator 1200 in CSI Part 1 for one CSI reporting instance. Thus, the CSI report may include, for CSI Part 1, an indicator of the total number of NZCs summed across multiple layers for each number of multiple DD basis numbers.

[0065] In a first exemplary embodiment, a wireless device (or other wireless node of a wireless communication system) may generate an indicator 1200 according to Equation 1, as described herein in connection with FIG. 10, where the total number of NZCs is a value over a number of DD basis numbers (e.g., K NZ =K0), otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is twice that value for the multiple DD base number (e.g., K NZ = 2K0). For example, indicator 1200 may include one indication for each q. In some cases, value q may start from an initial value (e.g., 0) and increase (e.g., increment) by an integer value (e.g., 1) for each value Q (e.g., for each DD basis). With reference to FIG. 12, indicator 1200 may include a first indication 1202 for the total number of NZCs summed across all layers for the first Q (e.g., q = 0), a second indication 1204 for the total number of NZCs summed across all layers for the second Q (e.g., q = 1), and a third indication 1206 for the total number of NZCs summed across all layers for the last Q (e.g., q = Q-1). Indicator 1200 may include an amount of indications equal to the amount of Q.

[0066] In a second exemplary embodiment, the wireless device may generate the indicator 1200 according to Equation 1, where the sum (e.g., if the maximum allowed rank is 1, the total number of NZCs is the sum of the respective values ​​(e.g., K (i) ) and [ka] Otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is twice the value for each of the multiple DD base numbers. [ka] For example, the indicator 1200 may include an indication for each q. In some cases, the value q may start from an initial value (e.g., 0) and increase (e.g., increment) by an integer value (e.g., 1) for each value Q (e.g., for each DD basis). With reference to FIG. 12, the indicator 1200 may include a first indication 1202 for the total number of NZCs summed across all layers for the first Q (e.g., q=0), a second indication 1204 for the total number of NZCs summed across all layers for the second Q (e.g., q=1), and a third indication 1206 for the total number of NZCs summed across all layers for the last Q (e.g., q=Q-1). The indicator 1200 may include an amount of indications equal to the amount of Q.

[0067] 13 is a diagram illustrating an example of an indicator 1300 of the total amount of NZC summed across all layers and associated with one or more DD bases for CSI part 1 and / or CSI part 2 according to various configurations. During high to medium speed communication, the Type II codebook refinement may include additional parameters. For example, a parameter Q may be used for time compression. In some cases, the parameter Q may indicate the amount of DD bases.

[0068] In some implementations, the indicator 1300 may include multiple indications. For example, the wireless device (e.g., UE 104) may combine (e.g., sum) the total amount of NZC across all layers for a first portion of Q and report indicator 1302 in CSI Part 1 (e.g., a first portion of indicator 1300 associated with CSI Part 1) for one CSI reporting instance. Further, the wireless device may combine the total amount of NZC across all layers for a second portion of Q and report indicator 1304 in CSI Part 2 (e.g., a second portion of indicator 1300 associated with CSI Part 2) for one CSI reporting instance. Thus, the CSI report may include a first indicator for a first total number of NZCs summed across layers for a first DD basis number for CSI Part 1 and a second indicator for a second total number of NZCs summed across layers for a second DD basis number for CSI Part 2.

[0069] In a first exemplary embodiment, a wireless device (or other wireless node of a wireless communication system) may generate an indicator 1302 according to Equation 1, as described herein in connection with FIG. 10, where if the total (e.g., maximum) allowed rank is 1, then a first total number of NZCs is a value (e.g., K NZ =K0), otherwise, if the total allowable rank is a number other than 1, the first total number of NZCs is double that value (e.g., K NZ The wireless device may generate an indicator 1304 according to Equation 1, where if the total (e.g., maximum) allowed rank is 1, then the second total number of NZCs for each of the second DD basis numbers is equal to that value (e.g., K NZ =K0), otherwise, if the total allowable rank is a number other than 1, then the second total number of NZCs for each of the second DD base numbers is twice that value (e.g., K NZ =2K0).

[0070] In some examples, indicator 1300 may include one indication for each q. In some cases, value q may start from an initial value (e.g., 0) and increase (e.g., increment) by an integer value (e.g., 1) for each value Q (e.g., for each DD basis). With reference to FIG. 13, indicator 1302 may include a first indication 1306 for a first total number of NZCs summed across all layers for the first Q (e.g., q=0). Indicator 1304 may include a first indication 1308 for a second total number of NZCs summed across all layers for the second Q (e.g., q=1), and a third indication 1310 for a third total number of NZCs summed across all layers for the last Q (e.g., q=Q-1). Indicator 1304 may include an amount of indications equal to Q minus 1 (e.g., for indication 1306 included in indicator 1302).

[0071] In a second exemplary embodiment, a wireless device (or other wireless node of a wireless communication system) may generate the indicator 1302 according to the following equation: [ka] Here, β i is constructed by upper layer parameters (e.g., i={0,1,…,Q-1}) in the range 0<β i <1. If the total (e.g., maximum) allowable rank is 1, the first total number of NZCs is the first value [ka] otherwise, if the total allowable rank is a number other than 1, then the first total number of NZCs is twice that first value. [ka] The wireless device may generate the indicator 1304 according to Equation 1, where if the total (e.g., maximum) allowed rank is 1, then the second total number of NZCs for each of the second DD basis numbers is the respective second value [ka] otherwise, if the total allowed rank is a number other than 1, then the second total number of NZCs for each of the second DD base numbers is twice its respective second value. [ka] It is.

[0072] In some examples, indicator 1300 may include an indication for each q. In some cases, value q may start from an initial value (e.g., 0) and increase (e.g., increment) by an integer value (e.g., 1) for each value Q (e.g., for each DD basis). With reference to FIG. 13, indicator 1302 may include a first indication 1306 for a first total number of NZCs summed across all layers for the first Q (e.g., q=0). Indicator 1304 may include a first indication 1308 for a second total number of NZCs summed across all layers for each second Q (e.g., q=1), and a third indication 1310 for a third total number of NZCs summed across all layers for each last Q (e.g., q=Q-1). Indicator 1304 may include an amount of indications equal to Q minus 1 (e.g., for indication 1306 included in indicator 1302).

[0073] FIG. 14A and FIG. 14B are flowchart diagrams illustrating examples of methods 1400-a and 1400-b for CSI report enhancement according to various configurations. In some cases, for priority formulation in an extended type II report for a given CSI report n, a plurality of reported elements may be associated with priority values. For example, the reported elements can include subband amplitudes, subband phases, and the positions of coefficients indexed by l, i, and f such that the priority value is represented as Pri(l,i,f). In some examples, the element with the (e.g., relatively) highest priority has the lowest associated priority value. For example, a frequency domain (FD) basis (e.g., priority value: FD-basis > SD-basis > layer) having a higher priority value than a spatial domain (SD) basis priority value higher than a layer priority value may have a lower priority than the SD basis and the layer (e.g., priority: FD-basis < SD-basis < layer).

[0074] In some examples, the priority value can be calculated by the following formula.

Chemical formula

[0075] At 1402, a wireless communication device may receive a plurality of reference signals and configuration parameters from a network. In some implementations, the reference signal may be one or more CSI-RSs. In some cases, the configuration parameter may be a configuration for enabling two or more CQIs in a CSI report. For example, the network may transmit the configuration parameter via a radio resource control (RRC) message, a media access control control element (MAC-CE) message, a downlink control information (DCI) message, or any combination thereof, among other control messages and / or configuration messages. At 1404, the wireless communication device may determine a CSI report based on the plurality of reference signals and configuration parameters, where the CSI report includes a CSI part 1 and a CSI part 2.

[0076] At 1406, the CSI report may include coefficient information including at least one coefficient associated with at least one PMI, and each of the at least one coefficient is associated with a priority value. For example, in a first exemplary embodiment, at 1408-a, the priority value is obtained according to a first priority value of a layer that is greater than a second priority value of an SD base, which is greater than a third priority value of an FD base, which is greater than a fourth priority value of a DD base (e.g., DD-base > FD-base > SD-base > layer). Thus, the priority of the DD base may be lower than that in the order of the FD base, the SD base, and the layer (e.g., DD-base < FD-base < SD-base < layer). In some examples, the priority value can be calculated (e.g., obtained) by the following formula.

Chemical formula

[0077] In a second exemplary embodiment, in 1408-b, a priority value is obtained according to a first priority value of a layer that is greater than a second priority value of an SD base that is greater than a fourth priority value of a DD base that is greater than a third priority value of an FD base (e.g., FD-base > DD-base > SD-base > layer). Thus, the priority of the FD base may be lower in that order than the DD base, the SD base, and the layer (e.g., (e.g., FD-base < DD-base < SD-base < layer). In some examples, the priority value can be calculated (e.g., obtained) by the following equations [Chemical formula] and Equation 7. In 1410, the wireless communication device may report a CSI report including coefficient information to the network.

[0078] FIG. 15 is a flowchart diagram showing an example of a method 1500 for CSI report enhancement according to various configurations. In some cases, in the case of the DD base, the QDD base selected for the DD base set may be indicated by a combination coefficient.

[0079] At 1502, the wireless communication device may receive a plurality of reference signals and configuration parameters from the network. In some implementations, the reference signal may be one or more CSI-RSs. In some cases, the configuration parameter may be a configuration for enabling two or more CQIs in the CSI report. For example, the network can transmit the configuration parameter via an RRC message, a MAC-CE message, a DCI message, or any combination thereof, among other control messages and / or configuration messages. At 1504, the wireless communication device can determine a CSI report based on the plurality of reference signals and configuration parameters, where the CSI report includes CSI part 1 and CSI part 2.

[0080] At 1506, the CSI report may include an indication of a number of DD bases associated with the at least one PMI. At 1508, the number of DD bases may be indicated using a bit width determined based on the number of DD bases. For example, the bit width of the selected QDD base may be a first number [ka] or a second number [ka] In some cases, the number (e.g., information) of the DD base (e.g., selected QDD base) is mapped to CSI Part 2 Group 0, CSI Part 2 Group 1, or CSI Part 2 Group 2 for one reporting instance. In some implementations, the first DD base may be selected (e.g., by default). At 1510, the wireless communication device may report a CSI report to the network including the DD base number.

[0081] 16 is a flow chart diagram illustrating an example of a method 1600 for enhanced CSI reporting according to various configurations. In some cases, the method 1600 may include a configuration for the CSI reporting to include a strongest coefficient indicator (SCI). For example, for each layer, each Q, or both, the SCI may span a selected SD basis, FD basis, DD basis, or any combination thereof.

[0082] At 1602, the wireless communication device may receive a plurality of reference signals and configuration parameters from a network. In some implementations, the reference signals may be one or more CSI-RS. In some cases, the configuration parameters may be configurations for enabling two or more CQIs in a CSI report. For example, the network may transmit the configuration parameters via an RRC message, a MAC-CE message, a DCI message, or any combination thereof, among other control and / or configuration messages. At 1604, the wireless communication device may determine a CSI report based on the plurality of reference signals and the configuration parameters, where the CSI report includes CSI Part 1 and CSI Part 2.

[0083] At 1606, the CSI report may include an SCI associated with at least one PMI. In some embodiments, the location of the SCI may be mapped to Group 0 of CSI Part 2, Group 0 of CSI Part 2 for the first DD base, Group 1 of CSI Part 2 for the second DD base, or any combination thereof for one CSI report instance. The bit width of the SCI may be determined based on a total number of NZCs summed across multiple layers and across multiple DD base numbers for rank 1, or based on a value for ranks 2, 3, and 4, or based on the value for ranks 1, 2, 3, and 4. In some embodiments, the value is determined according to the number of SD bases. For example, for a rank equal to 1, the bit width of the location occupied by the SCI may be determined based on a total number of NZCs summed across multiple layers and across multiple DD base numbers .... [ka] bits, and for ranks equal to 2, 3, or 4, the bit width of the position occupied by the SCI [ka] In some cases, for ranks equal to 1, 2, 3, or 4, the bit width of the positions occupied by the SCIs may be [ka] At 1608, the wireless communication device may report a CSI report including the SCI to the network.

[0084] 17 is a flow chart diagram illustrating an example of a method 1700 for enhanced CSI reporting according to various configurations. In some cases, the method 1700 may include configuration for CSI reporting to include a highest priority bit of a position of a coefficient associated with at least one PMI.

[0085] At 1702, the wireless communication device may receive a plurality of reference signals and configuration parameters from a network. In some implementations, the reference signals may be one or more CSI-RS. In some cases, the configuration parameters may be configurations for enabling two or more CQIs in a CSI report. For example, the network may transmit the configuration parameters via an RRC message, a MAC-CE message, a DCI message, or any combination thereof, among other control and / or configuration messages. At 1704, the wireless communication device may determine a CSI report based on the plurality of reference signals and the configuration parameters, where the CSI report includes CSI Part 1 and CSI Part 2.

[0086] At 1706, the highest priority bit of the coefficient position may be determined based on a priority function and mapped to the CSI Part 2 groups in descending order. In some implementations, the priority function may be determined according to an index of the DD basis, the FD basis, the SD basis, and / or a layer index. In a first exemplary embodiment ... [ka] where, in descending order of priority based on the function Pri(l,i,f), {i 1,7,l ;l=1,…,v}.

[0087] In a second exemplary embodiment, the highest priority bit may be further determined based on the DD basis number and mapped to Group 1 of CSI Part 2 in descending order. The CSI report may further include a lowest priority bit determined based on a priority function and mapped to Group 2 of CSI Part 2 in descending order. For example, the highest priority bit of a coefficient position may be mapped to Group 2 of CSI Part 2 in descending order of priority based on a function Pri(l,i,f,q) for one CSI report instance. [ka] The lowest priority bits of the coefficient positions are assigned to one CSI reporting instance in order of decreasing priority based on the function Pri(l,i,f,q). [ka] and may be mapped to Group 2 in CSI Part 2. In some implementations, referring back to Equation 2 in FIG. 11 , if the total (e.g., maximum) allowed rank is 1, the total number of NZCs may be a certain value (e.g., K NZ =K0), otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is double that value (e.g., K NZ =2K0).

[0088] In a third exemplary embodiment, a highest priority bit may be further determined for each DD basis and mapped to Group 1 of CSI Part 2 in descending order. The CSI report may further include a lowest priority bit determined based on a priority function and mapped to Group 2 of CSI Part 2 in descending order. For example, the highest priority bit of a coefficient position may be mapped for one CSI report instance in descending order of priority based on a function Pri(l,i,f,q). [ka] The lowest priority bits of the coefficient positions may be assigned to group 1 of CSI part 2 in order of decreasing priority based on the function Pri(l,i,f,q) for one CSI reporting instance. [ka] and may be mapped to Group 2 in CSI Part 2. In some implementations, referring back to Equation 3 in FIG. 13 , where q=i and q={0, 1, ..., Q-1}, if the total (e.g., maximum) allowed rank is 1, then the total number of NZCs may be some value [ka] otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is double that value. [ka] It is.

[0089] In a fourth exemplary embodiment, when CSI Part 2 includes multiple groups (e.g., adding more groups in CSI Part 2 for one CSI reporting instance), the highest priority bit may be further determined for each DD base number and mapped to one of the multiple groups in CSI Part 2 in descending order. The CSI report may further include a lowest priority bit determined based on a priority function and mapped to the multiple groups in CSI Part 2 in descending order. For example, the highest priority bit of a coefficient position may be determined based on a priority function Pri(l,i,f,q) for one CSI reporting instance in descending order of priority. [ka] and may be mapped to group (q+1)*2-1 in CSI part 2. The lowest priority bits of the coefficient positions are assigned to one CSI reporting instance in order of decreasing priority based on the function Pri(l,i,f,q). [ka] and may be mapped to group (q+1)*2 in CSI Part 2. In some implementations, referring back to Equation 3 in FIG. 13 , where q=i and q={0, 1, ..., Q-1}, if the total (e.g., maximum) allowed rank is 1, then the total number of NZCs may be some value [ka] otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is double that value. [ka] It is.

[0090] In some embodiments, the CSI report may be configured with two additional groups in CSI Part 2 for one CSI reporting instance, such that there are five groups in CSI Part 2 for one CSI reporting instance. For example, in the fifth exemplary embodiment, a highest priority bit may be further determined for each DD basis number. For a first DD basis number, the highest priority bit for each DD basis number may be mapped to group 1 of CSI Part 2 in descending order. The CSI report may further include a lowest priority bit determined based on a priority function and mapped to group 2 of CSI Part 2 in descending order. For a second DD basis number, the highest priority bit for each DD basis number may be mapped to group 3 of CSI Part 2 in descending order. The CSI report may further include a lowest priority bit determined based on a priority function and mapped to group 4 of CSI Part 2 in descending order. For example, for q=0, the highest priority bit of the coefficient position may be mapped to group 5 of CSI Part 2 in descending order of priority based on the function Pri(l,i,f,q) for one CSI reporting instance. [ka] and may be mapped to Group 1 of CSI Part 2. The lowest priority bits in the NZC position are assigned to one CSI reporting instance in order of decreasing priority based on the function Pri(l,i,f,q). [ka] and may be mapped to group 2 of CSI part 2. For q>0, the highest priority bit of the coefficient position is assigned to one CSI reporting instance in order of decreasing priority based on the function Pri(l,i,f,q). [ka] and may be mapped to group 3 of CSI part 2. The lowest priority bits of the coefficient positions are assigned to one CSI reporting instance in order of decreasing priority based on the function Pri(l,i,f,q). [ka] and may be mapped to Group 4 in CSI Part 2. In some implementations, referring back to Equation 3 in FIG. 13 , where q=i and q={0, 1, ..., Q-1}, if the total (e.g., maximum) allowed rank is 1, then the total number of NZCs may be some value [ka] otherwise, if the total allowable rank is a number other than 1, the total number of NZCs is double that value. [ka] At 1708, the wireless communication device may report the CSI report including the highest priority bit to the network.

[0091] Although various configurations of the present solution have been described above, it should be understood that they are presented only as examples and not as limitations. Similarly, various figures may depict example architectures or configurations provided to enable those skilled in the art to understand example features and functionality of the present solution. However, as such skilled in the art will appreciate, the solution is not limited to the example architectures or configurations shown, but may be implemented using various alternative architectures and configurations. Furthermore, as will be appreciated by those skilled in the art, one or more features of some configurations may be combined with one or more features of another configuration described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the example configurations described above.

[0092] It is also understood that any reference to an element herein using a designation such as "first," "second," etc., does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first and a second element does not imply that only two elements may be used or that the first element must precede the second element in any way.

[0093] Furthermore, those skilled in the art will understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, and symbols that may be referred to in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0094] Moreover, as will be appreciated by those skilled in the art, any of the various exemplary logic blocks, modules, processors, means, circuits, methods, and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., digital implementations, analog implementations, or a combination of the two), firmware, various forms of programs or design codes incorporating instructions (which may be conveniently referred to herein as "software" or "software modules"), or any combination of these technologies. To clearly illustrate this interchangeability of hardware, firmware, and software, the various exemplary components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these technologies, depends on the particular application and design constraints imposed on the overall system. Those skilled in the art may implement the described functions in various ways for each particular application, but such implementation decisions do not depart from the scope of the present disclosure.

[0095] Further, those skilled in the art will appreciate that the various exemplary logic blocks, modules, devices, components, and circuits described herein may be implemented in or performed by an integrated circuit (IC), which may include a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logic blocks, modules, and circuits may further include an antenna and / or a transceiver for communicating with various components in a network or device. The general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a DSP core, or any other suitable configuration for performing the functions described herein.

[0096] When implemented in software, the functions can be stored as one or more instructions or codes on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media, including any medium that can be enabled to transfer a computer program or code from one place to another. A storage medium can be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0097] As used herein, the term "module" refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Moreover, for purposes of explanation, the various modules are described as individual modules. However, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs associated functions related to the configuration of the present solution.

[0098] Further, memory or other storage devices, as well as communication components, may be used in the configuration of the solution. For clarity, it may be appreciated that the above description has described the configuration of the solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements, or domains may be used without detracting from the solution. For example, functionality illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Thus, references to specific functional units are merely references to suitable means for providing the described functionality, rather than to a strict logical or physical structure or organization.

[0099] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as set forth in the following claims.

Claims

1. 1. A wireless communication method, comprising: receiving, by a wireless communication device, a plurality of reference signals and configuration parameters from a network; determining a channel state information (CSI) report based on the plurality of reference signals and the configuration parameters, the CSI report including CSI part 1 and CSI part 2; and reporting, by the wireless communication device, the CSI report to the network; A method comprising:

2. 2. The method of claim 1, wherein the CSI report comprises a plurality of channel quality indicator (CQI) sets, each of the plurality of CQI sets comprising a wideband CQI and at least one subband differential CQI associated with the wideband CQI.

3. The CSI report includes a set of channel quality indicators (CQIs); a first CQI set of the plurality of CQI sets including a wideband CQI and at least one first subband differential CQI associated with the wideband CQI; each of the one or more second CQI sets of the plurality of CQI sets includes at least one second subband differential CQI associated with the wideband CQI in the first CQI set; The method of claim 1.

4. 3. The method of claim 2, wherein a CQI mapping order for mapping to the CSI Part 1 in the CSI report includes, in this order, the wideband CQI for a first CQI set of the multiple CQI sets, the at least one subband differential CQI for the first CQI set, the wideband CQI for a second CQI set of the multiple CQI sets, and the at least one subband differential CQI for the second CQI set.

5. 3. The method of claim 2, wherein a CQI mapping order for mapping to the CSI Part 1 in the CSI report includes the wideband CQI for each of the plurality of CQI sets and the at least one subband differential CQI for each of the plurality of CQI sets.

6. 4. The method of claim 3, wherein a CQI mapping order for mapping to the CSI Part 1 in the CSI report includes, in this order, the wideband CQI for the first CQI set, the at least one first sub-band differential CQI for the first CQI set, and the at least one second sub-band differential CQI for each of the one or more second CQI sets.

7. The CQI mapping order in the CSI report is the wideband CQI for a first CQI set of the plurality of CQI sets and the at least one subband differential CQI for the first CQI set, in that order, for mapping to the CSI Part 1; the wideband CQI for a second CQI set of the plurality of CQI sets, the at least one subband differential CQI for the second CQI set, the wideband CQI for a third CQI set of the plurality of CQI sets, and the at least one subband differential CQI for the third CQI set, in this order, for mapping to the CSI Part 2; The method of claim 2.

8. The CQI mapping order in the CSI report is the wideband CQI for a first CQI set of the plurality of CQI sets and the wideband CQI for a second CQI set of the plurality of CQI sets, in that order, for mapping to the CSI Part 1; the at least one subband differential CQI for the first CQI set and the at least one subband differential CQI for the second CQI set, in that order, for mapping to the CSI Part 2. The method of claim 2.

9. The CQI mapping order in the CSI report is comprising the wideband CQI for the first CQI set for mapping to the CSI Part 1; the at least one subband differential CQI for the first CQI set and the at least one subband differential CQI for each of the one or more second CQI sets, in that order, for mapping to the CSI Part 2. The method according to claim 3.

10. the configuration parameters are configured to enable two or more channel quality indicators (CQIs) in the CSI report; the reference signal being aperiodic or semi-persistent; or Each of the CSI window length, the Doppler domain base unit size, the offset between two CSI-RS resources, and the length of the Doppler domain base vector is equal to or greater than a threshold. Further comprising at least one of: The method of claim 1.

11. 10. The method of claim 1, further comprising: transmitting, by a wireless communication device, to the network, a user equipment (UE) capability report indicating that the wireless communication device supports a number of channel quality indicator (CQI) reports, the number being a positive integer.

12. 2. The method of claim 1, wherein the CSI report includes an indicator for a total number of non-zero coefficients summed across multiple layers and across multiple Doppler domain basis numbers for the CSI Part 1, the non-zero coefficients being associated with at least one Precoding Matrix Indicator (PMI).

13. the maximum allowed rank is one, the total number of non-zero coefficients is a value, and the maximum allowed rank is a number other than 1, and the total number of non-zero coefficients is twice that value. The method of claim 12.

14. the maximum allowed rank is one, the total number of non-zero coefficients is multiplied by the Doppler domain basis number; and the maximum allowable rank is a number other than 1, and the total number of non-zero coefficients is twice the value multiplied by the Doppler domain basis number. The method of claim 12.

15. the maximum allowed rank is one, the total number of non-zero coefficients is a value, and the maximum allowable rank is a number other than 1, the total number of non-zero coefficients is twice the value, and the value is determined based on the Doppler domain basis number. The method of claim 12.

16. 2. The method of claim 1, wherein the CSI report includes, for the CSI Part 1, an indicator for a total number of non-zero coefficients summed across multiple layers for a respective number of multiple Doppler domain basis numbers.

17. the maximum allowed rank is one, the total number of non-zero coefficients is a value for the plurality of Doppler domain basis numbers; and the maximum allowable rank is a number other than 1, and the total number of non-zero coefficients is twice the value for the plurality of Doppler domain basis numbers.

17. The method of claim 16.

18. the maximum allowed rank is one, the total number of non-zero coefficients is a respective value for each of the plurality of Doppler domain basis numbers; and the maximum allowable rank is a number other than one, and the total number of non-zero coefficients is twice the respective value for each of the plurality of Doppler domain basis numbers.

17. The method of claim 16.

19. The CSI report includes: for the CSI Part 1, a first indicator for a first total number of non-zero coefficients summed across a plurality of layers for a first Doppler domain basis number; and for the CSI Part 2, a second indicator for a second total number of non-zero coefficients summed across a plurality of layers for a second Doppler domain basis number; The method of claim 1.

20. For CSI Part 1, the maximum allowable rank is 1, the first count is a value, and the maximum allowable rank is a number other than 1, and the first total number is two times that value; and For CSI Part 2, the maximum allowable rank is one, the second total number for each of the second Doppler domain basis numbers is the value; and the maximum allowable rank is a number other than one, and the second total number for each of the second Doppler domain basis numbers is twice that value.

20. The method of claim 19.

21. For CSI Part 1, the maximum allowable rank is one, the first total number is a first value, and the maximum allowable rank is a number other than 1, the first total number is two times the first value, and For CSI Part 2, the maximum allowable rank is one, the second total numbers for each of the second Doppler domain basis numbers are respective second values; and the maximum allowable rank is a number other than one, and the second total number for each of the second Doppler domain basis numbers is twice the respective second value.

20. The method of claim 19.

22. The CSI report includes coefficient information, the coefficient information including at least one coefficient associated with at least one Precoding Matrix Indicator (PMI), each of the at least one coefficient being associated with a priority value; The priority value is: a first priority value for a layer is greater than a second priority value for a spatial domain basis, the second priority value for the spatial domain basis is greater than a third priority value for a frequency domain basis, and the third priority value for the frequency domain basis is greater than a fourth priority value for a Doppler domain basis; or the first priority value for the layer is greater than the second priority value for the spatial domain basis, the second priority value for the spatial domain basis is greater than the fourth priority value for the Doppler domain basis, and the fourth priority value for the Doppler domain basis is greater than the third priority value for the frequency domain basis. The method of claim 1 , obtained according to

23. The CSI report includes an indication of the Doppler domain basis number associated with at least one precoding matrix indicator (PMI); The Doppler domain basis number may be represented using a bit width determined based on the Doppler domain basis number; and the Doppler domain basis number is mapped to Group 0 of the CSI Part 2; or the Doppler domain basis number is mapped to Group 1 of the CSI Part 2; or The Doppler domain basis numbers are mapped to Group 2 of the CSI Part 2. The method of claim 1 , wherein the first and second electrodes are one of:

24. The CSI report includes a strongest coefficient indicator (SCI) across a plurality of spatial domain, frequency domain, and Doppler domain bases, the SCI being associated with at least one precoding matrix indicator (PMI); The location of the SCI is mapped to Group 0 of the CSI Part 2; and The bit width of the SCI is for rank 1, the bit width is determined based on a total number of non-zero coefficients summed across multiple layers and multiple Doppler domain basis numbers, and for ranks 2, 3, and 4, the bit width is determined based on a value; or for ranks 1, 2, 3, and 4, said bit width is determined based on said value; The method of claim 1 , comprising:

25. The CSI report includes, for each layer and each Doppler domain basis, a strongest coefficient indicator (SCI) across a plurality of spatial and frequency domain bases, the SCI being associated with at least one precoding matrix indicator (PMI); The location of the SCI is mapped to Group 0 of the CSI Part 2; and The bit width of the SCI is for rank 1, the bit-width is determined based on a total number of non-zero coefficients summed across multiple layers and multiple Doppler domain basis numbers, and for ranks 2, 3, and 4, the bit-width is determined based on a value; or for ranks 1, 2, 3, and 4, said bit width is determined based on said value; The method of claim 1 , comprising:

26. The CSI report includes, for each layer and each Doppler domain basis, a strongest coefficient indicator (SCI) across a plurality of spatial and frequency domain bases, the SCI being associated with at least one precoding matrix indicator (PMI); the location of the SCI is mapped to Group 0 of the CSI Part 2 for a first Doppler domain basis; The location of the SCI is mapped to Group 1 of the CSI Part 2 for a second Doppler domain basis; and The bit width of the SCI is for rank 1, the bit width is determined based on a total number of non-zero coefficients summed across multiple layers and multiple Doppler domain basis numbers, and for ranks 2, 3, and 4, the bit width is determined based on a value; or for ranks 1, 2, 3, and 4, said bit width is determined based on said value; The method of claim 1 , comprising:

27. The method of claim 24 , wherein the value is determined according to the spatial domain basis number.

28. 2. The method of claim 1, wherein the CSI report includes a highest priority bit of a position of a coefficient determined based on a priority function, the positions of the coefficients mapped to the CSI Part 2 groups in descending order, and the positions of the coefficients associated with at least one Precoding Matrix Indicator (PMI).

29. 29. The method of claim 28, wherein the priority function is determined according to an index of a DD basis, an FD basis, an SD basis, and a layer index.

30. The highest priority bit is determined based on the Doppler domain basis number; the highest priority bits determined based on the priority function are mapped in descending order to Group 1 of CSI Part 2; and the CSI report includes a lowest priority bit determined based on the priority function, the lowest priority bit being mapped to Group 2 of the CSI Part 2 in descending order.

29. The method of claim 28.

31. the highest priority bit is determined for each of the Doppler domain base numbers; the highest priority bits determined based on the priority function are mapped in descending order to Group 1 of CSI Part 2; and the CSI report includes a lowest priority bit determined based on the priority function, the lowest priority bit being mapped to Group 2 of the CSI Part 2 in descending order.

29. The method of claim 28.

32. the highest priority bit is determined for each of the Doppler domain base numbers; the group of the CSI Part 2 includes a plurality of groups, the highest priority bit for each of the Doppler domain base numbers is mapped in descending order to one of the groups in the CSI Part 2; and the CSI report includes a lowest priority bit determined based on the priority function, the lowest priority bit being mapped to the plurality of groups of the CSI Part 2 in descending order.

29. The method of claim 28.

33. the highest priority bit is determined for each of the Doppler domain base numbers; For the first Doppler domain basis number, the highest priority bit for each of the Doppler domain basis numbers is mapped to Group 1 of the CSI Part 2 in descending order; and the CSI report includes a lowest priority bit determined based on the priority function, the lowest priority bit being mapped to Group 2 of the CSI Part 2 in descending order; For the second Doppler domain basis number, the highest priority bit for each of the Doppler domain base numbers is mapped to Group 3 of the CSI Part 2 in descending order; and the CSI report includes a lowest priority bit determined based on the priority function, the lowest priority bits being mapped to Group 4 of the CSI Part 2 in descending order.

29. The method of claim 28.

34. A wireless communication device comprising at least one processor and a memory, the at least one processor configured to read code from the memory and to implement the method of claim 1.

35. 13. A computer program product comprising computer readable program medium code stored thereon, the code, when executed by at least one processor, causing the at least one processor to perform the method of claim 1.

36. 1. A wireless communication method, comprising: transmitting, by a network, a plurality of reference signals and configuration parameters to a wireless communication device; receiving, by the network, channel state information (CSI) from the wireless communication device, the CSI report including CSI part 1 and CSI part 2; A wireless communication method comprising:

37. 37. A wireless communications device comprising at least one processor and a memory, the at least one processor configured to read code from the memory and to implement the method of claim 36.

38. 37. A computer program product comprising computer readable program medium code stored thereon, the code, when executed by at least one processor, causing the at least one processor to perform the method of claim 36.

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