Method and apparatus for reusing channel state information

Abstract

The present disclosure relates to a communication method and system for integrating a fifth-generation (5G) communication system that supports higher data rates beyond the fourth-generation (4G) system with Internet of Things (IoT) technology. The present disclosure can be applied to intelligent services based on 5G communication technology and IoT-related technologies, such as smart home, smart building, smart city, smart car, connected car, healthcare, digital education, smart retail, security and safety services. A method and apparatus for multiplexing channel state information (CSI). A user equipment (UE) includes a transceiver configured to receive configuration information for CSI reporting. The UE further includes a processor configured to decode the configuration information and calculate CSI according to the configuration information. The transceiver is further configured to transmit the calculated CSI on an uplink (UL) channel. The CSI includes N segments and is transmitted in one time slot, where N>1. The first of the N segments includes a rank indicator (RI) and at least one other CSI parameter. A base station (BS) includes a processor configured to generate configuration information for CSI reporting. The BS further includes a transceiver configured to transmit the configuration information to the UE via a downlink (DL) channel; and, receive a CSI report calculated according to the configuration information from the UE on the uplink UL channel.

Description

[0001] This application is a divisional application of the patent application with the application date of December 14, 2017 and the application number of 201780076819.8. Technical Field

[0002] The present disclosure generally relates to methods for enabling channel state information (CSI) multiplexing. Such methods can be used when a user equipment is equipped with multiple transmit antennas and transmit-receive units. Background Art

[0003] In order to meet the increasing demand for wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems". The 5G communication system is considered to be implemented in a higher frequency (mmWave) band (e.g., 60 GHz band) in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, massive antenna technology are discussed in 5G communication systems. In addition, in 5G communication systems, research and development of system network improvements are ongoing based on advanced small cells, cloud radio access network (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), receiver interference cancellation, etc. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superimposed coding (SWSC) as advanced coding modulation (ACM), as well as filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0004] The Internet, as a human - centered connected network where people generate and consume information, is now evolving towards the Internet of Things (IoT), in which distributed entities such as things exchange and process information without human intervention. The Internet of Everything (IoE), which combines IoT technology and big data processing technology by connecting to cloud servers, has emerged. As technical elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology", and "security technology" are required for IoT implementation, sensor networks, machine - to - machine (M2M) communication, machine - type communication (MTC), etc. have been recently studied. Such an IoT environment can provide intelligent Internet technology services that create new value for human life by collecting and analyzing data generated between connected things. Through the integration and combination between existing information technology (IT) and various industrial applications (IT), IoT can be applied in multiple fields including smart home, smart building, smart city, smart car or connected vehicle, smart grid, healthcare, smart appliances, and advanced medical services.

[0005] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine - type communication (MTC), and machine - to - machine (M2M) communication can be implemented through beamforming, MIMO, and array antennas. The application of cloud radio access network (RAN) as the above - mentioned big data processing technology can also be considered an example of the convergence between 5G technology and IoT technology.

[0006] Wireless communication is one of the most successful innovations in modern history. Due to the increasing popularity of smart phones and other mobile data devices (such as tablet computers, "phablet" computers, netbooks, e - book readers, and machine - type devices) among consumers and enterprises, the demand for wireless data services is increasing rapidly. To meet the high growth of mobile data services and support new applications and deployments, improvements in wireless interface efficiency and coverage are crucial.

[0007] A mobile device or user equipment can measure the quality of the downlink channel and report this quality to the base station so that a determination can be made as to whether various parameters should be adjusted during communication with the mobile device. The existing channel quality reporting process in wireless communication systems is insufficient to accommodate the reporting of channel state information associated with large two - dimensional array transmit antennas or antenna array geometries that typically accommodate a large number of antenna elements. SUMMARY OF THE INVENTION

[0008] TECHNICAL PROBLEM

[0009] Therefore, there is a need to provide a channel state information (CSI) multiplexing scheme associated with large two - dimensional array transmit antennas.

[0010] Technical solution

[0011] Various embodiments of the present disclosure provide methods and apparatuses for CSI multiplexing.

[0012] In one embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to receive configuration information for CSI reporting. The UE further includes a processor operably connected to the transceiver. The processor is configured to decode the configuration information and calculate CSI according to the configuration information. The transceiver is further configured to transmit the calculated CSI on an uplink (UL) channel. The CSI includes N segments and is transmitted in one time slot, where N>1. The first of the N segments includes a rank indicator (RI) and at least one other CSI parameter.

[0013] In another embodiment, a base station (BS) is provided. The BS includes a processor configured to generate configuration information for CSI reporting. The BS further includes a transceiver operably connected to the processor. The transceiver is configured to transmit the configuration information to the UE via a downlink (DL) channel; and receive a CSI report calculated according to the configuration information from the UE on the uplink UL channel. The CSI includes N segments and is transmitted in one time slot, where N>1. The first of the N segments includes a rank indicator (RI) and at least one other CSI parameter.

[0014] In another embodiment, a method for operating a UE is provided. The method includes receiving and decoding configuration information for CSI reporting, calculating CSI according to the configuration information, and transmitting the calculated CSI on the UL. The CSI includes N segments and is transmitted in one time slot, N>1. The first of the N segments includes an RI and at least one other CSI parameter.

[0015] The present disclosure relates to a pre-fifth-generation (5G) or 5G communication system provided to support higher data rates beyond fourth-generation (4G) communication systems such as Long-Term Evolution (LTE).

[0016] Other technical features can be readily apparent to those skilled in the art from the following drawings, description, and claims.

[0017] Before presenting the following detailed description, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term "couple" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with each other. The terms "send," "receive," and "communicate" and their derivatives include both direct and indirect communication. The terms "include" and "comprise" and their derivatives mean including but not limited to. The term "or" is inclusive, meaning and / or. The phrase "associated with" and its derivatives mean including, included within, interconnected with, containing, contained in, connected to or coupled with, capable of communicating with, cooperating, interlacing, juxtaposing, adjacent to, bound to or coupled to, having, having the property of, related to, and so on. The term "controller" means any device, system, or part thereof that controls at least one operation. Such a controller can be implemented in hardware, or in a combination of hardware and software and / or firmware. The functions associated with any particular controller can be centralized or distributed, whether locally or remotely. When used with a list of items, the phrase "at least one" means that different combinations of one or more of the listed items can be used, and it may be only one item in the list. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0018] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed of computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, procedures, functions, objects, classes, instances, related data, or a portion thereof that are adapted to be implemented in a suitable computer-readable program. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, compact disc (CD), digital video disc (DVD), or any other type of memory. A "non-transitory" computer-readable medium excludes wired, wireless, optical, or other communication links that transmit transient electrical signals or other signals. Non-transitory computer-readable medium includes media that can permanently store data and media that can store and later rewrite data, such as rewritable compact discs or erasable memory devices.

[0019] Certain other words and phrases are defined throughout this patent document. One of ordinary skill in the art should understand that, in many if not most instances, such definitions apply to the prior and future use of such defined words and phrases.

[0020] Beneficial effects

[0021] Various embodiments of the present disclosure provide methods and apparatuses for CSI multiplexing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more fully understand the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0023] Figure 1 An example wireless network is shown in accordance with various embodiments of the present disclosure;

[0024] Figure 2a and Figure 2b An example wireless transmit and receive path is shown in accordance with various embodiments of the present disclosure;

[0025] Figure 3a An example UE is shown in accordance with various embodiments of the present disclosure;

[0026] Figure 3b An example BS is shown in accordance with various embodiments of the present disclosure;

[0027] Figure 4 An example beamforming architecture is shown in which one CSI-RS port is mapped to a large number of analog-controlled antenna elements;

[0028] Figure 5 Several examples of CSI reporting band configurations are shown in accordance with embodiments of the present disclosure;

[0029] Figure 6 An example for UCI codeword formation is shown in accordance with embodiments of the present disclosure;

[0030] Figure 7 An example for joint coding of CSI parameters is shown in accordance with embodiments of the present disclosure;

[0031] Figure 8 An example for two-segment UCI coding is shown in accordance with embodiments of the present disclosure;

[0032] Figure 9a An example for two-segment CSI coding is shown in accordance with embodiments of the present disclosure;

[0033] Figure 9bShows an example for two-segment UCI coding according to an embodiment of the present disclosure;

[0034] Figure 10 Shows an example for three-segment UCI coding according to an embodiment of the present disclosure;

[0035] Figure 11a - Figure 11g Shows an example for two-segment UCI coding according to an embodiment of the present disclosure;

[0036] Figure 12 Shows several examples of a multiplexing scheme according to an embodiment of the present disclosure, in which CSI-UCI is transmitted together with UL-SCH data;

[0037] Figure 13 Shows an example for UCI multiplexing in the case of two-segment UCI coding according to an embodiment of the present disclosure;

[0038] Figure 14 Shows a flowchart of an example method according to an embodiment of the present disclosure in which a UE receives CSI configuration information and reports multi-segment CSI; and

[0039] Figure 15 Shows a flowchart of an example method according to an embodiment of the present disclosure in which a BS transmits CSI configuration information and receives a multi-segment CSI report for a UE (labeled UE-k). Detailed Description

[0040] The following discussion Figures 1 to 15 and the various embodiments used to describe the principles of the present disclosure in this patent document are merely exemplary and should not be construed in any way as limiting the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged wireless communication system.

[0041] List of Acronyms

[0042] · 2D: Two-dimensional

[0043] · MIMO: Multiple-Input Multiple-Output

[0044] · SU-MIMO: Single-User MIMO

[0045] · MU-MIMO: Multi-User MIMO

[0046] · 3GPP: 3rd Generation Partnership Project

[0047] · LTE: Long-Term Evolution

[0048] · UE: User Equipment

[0049] · eNB: Evolved Node B or "eNB"

[0050] · BS: Base Station

[0051] · DL: Downlink

[0052] · UL: Uplink

[0053] · CRS: Cell-specific Reference Signal

[0054] · DMRS: Demodulation Reference Signal

[0055] · SRS: Sounding Reference Signal

[0056] · UE-RS: UE-specific Reference Signal

[0057] · CSI-RS: Channel State Information Reference Signal

[0058] · SCID: Scrambling Identity

[0059] · MCS: Modulation and Coding Scheme

[0060] · RE: Resource Element

[0061] · CQI: Channel Quality Information

[0062] · PMI: Precoding Matrix Indicator

[0063] · RI: Rank Indicator

[0064] · MU-CQI: Multi-User CQI

[0065] · CSI: Channel State Information

[0066] · CSI-IM: CSI Interference Measurement

[0067] · CoMP: Coordinated Multi-Point

[0068] · DCI: Downlink Control Information

[0069] · UCI: Uplink Control Information

[0070] · PDSCH: Physical Downlink Shared Channel

[0071] · PDCCH: Physical Downlink Control Channel

[0072] · PUSCH: Physical Uplink Shared Channel

[0073] · PUCCH: Physical Uplink Control Channel

[0074] · PRB: Physical Resource Block

[0075] · RRC: Radio Resource Control

[0076] · AoA: Angle of Arrival

[0077] · AoD: Angle of Departure

[0078] The following documents and standards are incorporated by reference into this disclosure as if fully set forth herein: 3GPP Technical Specification (TS) 36.211 version 12.4.0, "E-UTRA, Physical Channels and Modulation" ("Reference 1"); 3GPP TS 36.212 version 12.3.0, "E-UTRA, Multiplexing and Channel Coding" ("Reference 2"); 3GPP TS 36.213 version 12.4.0, "E-UTRA, Physical Layer Procedures" ("Reference 3"); 3GPP TS 36.321 version 12.4.0, "E-UTRA, Medium Access Control (MAC) Protocol Specification" ("Reference 4"); and 3GPP TS 36.331 version 12.4.0, "E-UTRA, Radio Resource Control (RRC) Protocol Specification" ("Reference 5").

[0079] To meet the increasing demand for wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Thus, 5G or pre-5G communication systems are also referred to as "ultra 4G networks" or "post-LTE systems".

[0080] 5G communication systems are considered to be implemented in higher frequency (mmWave) bands (e.g., 60 GHz band) in order to achieve higher data rates. To reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technologies are discussed in 5G communication systems.

[0081] In addition, in 5G communication systems, research and development of system network improvements are ongoing based on advanced small cells, cloud radio access network (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), receiver interference cancellation, etc.

[0082] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superimposed coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0083] Figure 1 An example wireless network 100 in accordance with various embodiments of the present disclosure is shown. Figure 1The embodiment of the wireless network 100 shown is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0084] The wireless network 100 includes BS 101, BS 102, and BS 103. BS 101 communicates with BS 102 and BS 103. BS 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a proprietary IP network, or other data networks. Instead of "BS", alternative terms such as "eNB" (evolved Node B) or "gNB" (gNode B) can also be used. Depending on the network type, other well-known terms such as "base station" or "access point" can be used instead of "gNB" or "BS". For convenience, the terms "gNB" and "BS" are used in this patent document to refer to the network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, other well-known terms such as "mobile station", "subscriber station", "remote terminal", "wireless terminal", or "user equipment" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to the remote wireless devices that wirelessly access the gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or a generally considered fixed device (such as a desktop computer or vending machine).

[0085] gNB 102 provides wireless broadband access to the network 130 for a first plurality of UEs within the coverage area 120 of gNB 102. The first plurality of UEs includes: UE 111, which can be located in a small business (SB); UE 112, which can be located in an enterprise (E); UE 113, which can be located in a WiFi hotspot (HS); UE 114, which can be located in a first residence (R); UE 115, which can be located in a second residence (R); UE 116, which can be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. gNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within the coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101 - 103 can communicate with each other and with UEs 111 - 116 using 5G, LTE, LTE-A, WiMAX, or other advanced wireless communication technologies.

[0086] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0087] As described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 send measurement reference signals to UEs 111-116, and UEs 111-116 are configured for multiplexed CSI reporting as described in embodiments of the present disclosure. In various embodiments, one or more of UEs 111-116 generate and report multiplexed CSI.

[0088] although Figure 1 One example of a wireless network 100 is shown, but Figure 1 Various changes may be made. For example, wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement. Also, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 can communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 can provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0089] Figure 2a and Figure 2b Example wireless transmit and receive paths according to the present disclosure are shown. In the following description, transmit path 200 can be described as being implemented in a gNB (such as gNB 102) and receive path 250 can be described as being implemented in a UE (such as UE 116). However, it should be understood that receive path 250 can be implemented in a gNB and transmit path 200 can be implemented in a UE. In some embodiments, receive path 250 is configured to generate and report multiplexed CSI as described in embodiments of the present disclosure.

[0090] The transmit path 200 includes a channel coding and modulation block 205, a serial-to-parallel (S-to-P) block 210, an N-point inverse fast Fourier transform (IFFT) block 215, a parallel-to-serial (P-to-S) block 220, a "add cyclic prefix" block 225, and an upconverter (UC) 230. The receive path 250 includes a downconverter (DC) 255, a "remove cyclic prefix" block 260, a serial-to-parallel (S-to-P) block 265, an N-point fast Fourier transform (FFT) block 270, a parallel-to-serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0091] In the transmit path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as convolutional coding, Turbo coding, or low-density parity-check (LDPC) coding), and modulates the input bits (such as using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols. The S-to-P block 210 converts (such as demultiplexes) the serial modulation symbols into parallel data to generate N parallel symbol streams, where N is the number of IFFT / FFT points used in the gNB 102 and the UE 116. The N-point IFFT block 215 performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. The P-to-S block 220 converts (such as multiplexes) the parallel time-domain output symbols from the N-point FFT block 215 to generate a serial time-domain signal. The "add cyclic prefix" block 225 inserts a cyclic prefix into the time-domain signal. The UC 230 modulates (such as upconverts) the output of the "add cyclic prefix" block 225 to an RF frequency for transmission via the wireless channel. The signal can also be filtered at baseband before being upconverted to the RF frequency.

[0092] The RF signal transmitted from the gNB 102 arrives at the UE 116 after passing through the wireless channel, and operations opposite to those at the gNB 102 are performed at the UE 116. The DC 255 downconverts the received signal to a baseband frequency, and the'remove cyclic prefix' block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. The serial-to-parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. The N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. The parallel-to-serial block 275 converts the parallel frequency-domain signals into a sequence of modulation data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulation symbols to recover the original input data stream.

[0093] As described in more detail below, the transmit path 200 or the receive path 250 can perform signal transmission for multiplexing CSI reports. Each of the gNBs 101 - 103 can implement a transmit path 200 similar to transmitting to the UEs 111 - 116 in the downlink, and can implement a receive path 250 similar to receiving from the UEs 111 - 116 in the uplink. Similarly, each of the UEs 111 - 116 can implement a transmit path 200 for transmitting to the gNBs 101 - 103 in the uplink, and can implement a receive path 250 for receiving from the gNBs 101 - 103 in the downlink.

[0094] Figure 2a and Figure 2b Each of the components in can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, Figure 2a and Figure 2b At least some of the components in can be implemented in software, while other components can be implemented by configurable hardware or a hybrid of software and configurable hardware. For example, the FFT block 270 and the IFFT block 215 can be implemented as configurable software algorithms, where the value of the number of points N can be modified according to the implementation.

[0095] In addition, although described as using FFT and IFFT, this is merely illustrative and should not be construed as limiting the scope of the present disclosure. Other types of transforms can be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of the variable N can be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of the variable N can be any integer that is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0096] Although Figure 2a and Figure 2b show examples of wireless transmit and receive paths, various changes can be made to Figure 2a and Figure 2b For example, Figure 2a and Figure 2b The various components in can be combined, further subdivided, or omitted, and additional components can be added according to specific needs. Moreover, Figure 2a and Figure 2b are intended to show examples of the types of transmit and receive paths that can be used in a wireless network. Other suitable architectures can be used to support wireless communication in a wireless network.

[0097] Figure 3a Shows an example UE 116 according to the present disclosure. Figure 3aThe example of UE 116 shown is for illustration only, and Figure 1 UEs 111 - 115 of Figure 1 can have the same or similar configurations. However, UEs have a wide variety of configurations, and Figure 3a do not limit the scope of this disclosure to any particular implementation of a UE.

[0098] UE 116 includes antenna 305, radio frequency (RF) transceiver 310, transmit (TX) processing circuitry 315, microphone 320, and receive (RX) processing circuitry 325. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface 345, input 350, display 355, and memory 360. Memory 360 includes an operating system (OS) program 361 and one or more applications 362.

[0099] RF transceiver 310 receives incoming RF signals transmitted by gNB of Figure 1 the wireless network 100 from antenna 305. RF transceiver 310 down - converts the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signals are sent to RX processing circuitry 325, where RX processing circuitry 325 generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. RX processing circuitry 325 sends the processed baseband signals to speaker 330 (such as for voice data) or to processor 340 for further processing (such as for web browsing data).

[0100] TX processing circuitry 315 receives analog or digital voice data from microphone 320, or other outgoing baseband data (such as network data, emails, or interactive video game data) from processor 340. TX processing circuitry 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. RF transceiver 310 receives the outgoing processed baseband or IF signals from TX processing circuitry 315 and up - converts the baseband or IF signals to RF signals transmitted via antenna 305.

[0101] Processor 340 can include one or more processors or other processing devices and execute the OS program 361 stored in memory 360 to control the overall operation of UE 116. For example, processor 340 can control the reception of forward channel signals and the transmission of reverse channel signals through RF transceiver 310, RX processing circuitry 325, and TX processing circuitry 315 according to well - known principles. In some embodiments, processor 340 includes at least one microprocessor or microcontroller.

[0102] The processor 340 is also capable of executing other processes and programs resident in the memory 360, such as operations for CQI measurement and reporting for the systems described in embodiments of the present disclosure. The processor 340 can move data into or out of the memory 360 as needed for the execution of the processes. In some embodiments, the processor 340 is configured to execute the application 362 based on the OS program 361 or in response to signals received from the gNB or the operator. The processor 340 is also coupled to an I / O interface 345, where the I / O interface 345 provides the UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. The I / O interface 345 is a communication path between these accessories and the processor 340.

[0103] The processor 340 is also coupled to an input 350 (such as a keypad, touch screen, buttons, etc.) and a display 355. The operator of the UE 116 can use the input 350 to input data into the UE 116. The display 355 can be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website).

[0104] The memory 360 is coupled to the processor 340. A portion of the memory 360 can include random access memory (RAM), while another portion of the memory 360 can include flash memory or other read-only memory (ROM).

[0105] As described in more detail below, the UE 116 can perform signal transmission and calculations for multiplexing CSI reports. Although Figure 3a One example of the UE 116 is shown, various changes can be made to Figure 3a For example, Figure 3a The various components in can be combined, further subdivided, or omitted, and additional components can be added according to specific needs. As a specific example, the processor 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Moreover, although Figure 3a The UE 116 shown is configured as a mobile phone or smartphone, the UE can be configured to operate as other types of mobile or fixed devices.

[0106] Figure 3b An example gNB 102 according to the present disclosure is shown. Figure 3b The embodiment of the gNB 102 shown in is for illustration only, and Figure 1 Other gNBs can have the same or similar configurations. However, gNBs have a wide variety of configurations, and Figure 3bThe scope of the present disclosure is not limited to any particular implementation of the gNB. gNB 101 and gNB 103 can include structures that are the same as or similar to those of gNB 102.

[0107] As Figure 3b shown, gNB 102 includes a plurality of antennas 370a - 370n, a plurality of RF transceivers 372a - 372n, a transmit (TX) processing circuit 374, and a receive (RX) processing circuit 376. In some embodiments, one or more of the plurality of antennas 370a - 370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0108] The RF transceivers 372a - 372n receive incoming RF signals from the antennas 370a - 370n, such as signals transmitted by a UE or other gNBs. The RF transceivers 372a - 372n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. The RX processing circuit 376 sends the processed baseband signal to the controller / processor 378 for further processing.

[0109] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 378. The TX processing circuit 374 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceivers 372a - 372n receive the processed baseband or IF signal from the TX processing circuit 374 and up-convert the baseband or IF signal to an RF signal transmitted via the antennas 370a - 370n.

[0110] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceivers 372a - 372n, the RX processing circuit 376, and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as more advanced wireless communication functions. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0111] The controller / processor 378 is also capable of executing programs and other processes resident in the memory 380, such as the OS. The controller / processor 378 is also capable of supporting channel quality measurement and reporting for a system with a 2D antenna array, as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTC. The controller / processor 378 can move data into or out of the memory 380 as needed for the execution of processes.

[0112] The controller / processor 378 is also coupled to a backhaul or network interface 382. The backhaul or network interface 382 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The backhaul or network interface 382 can support communication via any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A), the backhaul or network interface 382 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver.

[0113] The memory 380 is coupled to the controller / processor 378. A portion of the memory 380 can include RAM, while another portion of the memory 380 can include flash memory or other ROM. In certain embodiments, multiple instructions, such as the BIS algorithm, are stored in the memory. The multiple instructions are configured such that the controller / processor 378 performs the BIS process and decodes the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0114] As described in more detail below, the transmit and receive paths of the gNB 102 (implemented using the RF transceivers 372a - 372n, the TX processing circuitry 374, and / or the RX processing circuitry 376) receive and decode multiplexed CSI.

[0115] Although Figure 3b an example of the gNB 102 is shown, various changes can be made to Figure 3b it. For example, the gNB 102 can include any number of Figure 3aEach component shown in

[0116] Rel.13 LTE supports up to 16 CSI-RS antenna ports, which enables the gNB to be equipped with a large number (such as 64 or 128) of antenna elements. In this case, multiple antenna elements are mapped to one CSI-RS port. Additionally, up to 32 CSI-RS ports will be supported in Rel.14 LTE. For next-generation cellular systems such as 5G, the maximum number of CSI-RS ports is expected to remain more or less the same.

[0117] For the mmWave band, although the number of antenna elements may be larger for a given form factor, the number of CSI-RS ports - which can correspond to the number of digital precoding ports - tends to be limited due to hardware constraints (such as the feasibility of installing a large number of ADC / DACs at mmWave frequencies), as shown in Figure 4 Embodiment 400. In this case, one CSI-RS port is mapped to a large number of antenna elements that can be controlled by an analog phase shifter bank 401. Then, one CSI-RS port can correspond to a subarray that generates a narrow analog beam through analog beamforming 405. This analog beam can be configured to scan a wider range of angles 420 by varying the phase shifter bank between symbols or subframes or time slots (where a subframe or time slot includes a set of symbols). The number of subarrays (equal to the number of RF chains) is the same as the number of CSI-RS ports N CSI-PORT The same. The digital beamforming unit 410 performs a linear combination across N CSI-PORT analog beams to further increase the precoding gain. Although the analog beam is broadband (and thus not frequency selective), the digital precoding can vary between frequency subbands or resource blocks.

[0118] To enable digital precoding, an efficient design of CSI-RS is an important factor. For this purpose, in Rel.13 LTE, three types of CSI reporting mechanisms corresponding to three types of CSI-RS measurement behaviors are supported: 1) 'Category A' CSI reporting corresponding to non-precoded CSI-RS; 2) 'Category B' reporting of CSI-RS corresponding to UE-specific beamforming with K = 1 CSI-RS resource; 3) 'Category B' reporting of CSI-RS corresponding to cell-specific beamforming with K > 1 CSI-RS resources. For non-precoded (NP) CSI-RS, a cell-specific one-to-one mapping between CSI-RS ports and TXRUs is utilized. Here, different CSI-RS ports have the same wide beamwidth and direction, and thus generally have the same cell coverage. For beamformed CSI-RS, beamforming operations (cell-specific or UE-specific) are applied to non-zero power (NZP) CSI-RS resources which include multiple ports. Here, (at least at a given time / frequency) CSI-RS ports have a narrow beamwidth and thus do not have wide cell range coverage, and (at least from the gNB perspective) at least some CSI-RS port resource combinations have different beam directions.

[0119] In LTE, depending on the number of transmission layers, up to two codewords are used for DL and UL data transmission (on DL data channels such as PDSCH or PDCH, and on UL data channels such as PUSCH or PUCH respectively) for spatial multiplexing. For L = 1 layer, one codeword is mapped to one layer. For L > 1 layers, each of the two codewords is mapped to at least one layer, where the L layers (rank-L) are almost evenly divided over the two codewords. Additionally, one codeword can also be mapped to > 1 layer, especially when only one of the two codewords is to be retransmitted.

[0120] Although beneficial for promoting modulation and coding scheme (MCS) adaptation for codewords (CW) and MMSE-SIC (MMSE with successive interference cancellation) receivers, it incurs some significant overhead compared to single CW mapping. The DL overhead comes from the additional DCI payload attributed to 2 fixed MCS fields and 2 fixed NDI-RV (DLHARQ-related) fields. The UL overhead comes from the need for two CQIs (4 full bits + delta 3 bits for wideband CQI and 2x overhead for subband CQI) for rank > 1 and two DLHARQ-ACKs for rank > 1. In the case of retransmissions, there is additionally the complexity of having to accommodate mapping schemes with more than one layer. Furthermore, when distributed MIMO such as non-coherent joint transmission (NC-JT) is incorporated into the design requirements of 5G NR, the number of codewords (CW) for DL and UL transmissions per UE can increase with the number of TRPs. Therefore, it is beneficial for NR to use only one CW per PDSCH / PUSCH dispatch per UE, at least for transmissions up to rank-2 or up to rank-4. Otherwise, for higher ranks, two CWs can be used per PDSCH / PUSCH dispatch per UE. Optionally, for all ranks, one CW can be used per PDSCH / PUSCH dispatch per UE.

[0121] Additionally, periodic CSI (P-CSI) reports in LTE are reported across multiple slots / subframes. This results in complex priority rules (due to discarding), and inter-subframe / slot dependencies that are not suitable for TDD and LAA (since the availability of UL subframes / slots is conditional). This mechanism is vulnerable to error propagation and stale CSI. The main reasons are: 1) PUCCH format 2 is too small to carry single-trigger CSI reports, 2) CQI payloads that are dependent on RI (due to using up to 2 CWs), 3) PMI payloads that are dependent on RI.

[0122] Another drawback of LTE design is encoding RI (and CRI) separately from CQI and PMI. This is necessary because the payloads of CQI and PMI are rank-dependent. Since the payload of RI is small and RI needs to be protected more than CQI and PMI (to ensure correct decoding of CQI and PMI), RI is also mapped differently from CQI and PMI. But even with such strong protection, there is no mechanism for the gNB to check whether the decoding of RI (and CRI) is successful (due to the lack of CRC).

[0123] Accordingly, when a single codeword (CW) is mapped to all L ≥ 1 transmission layers, different designs for CSI and its associated uplink control information (UCI) multiplexing schemes are required. This disclosure includes several components. Here, UCI includes reporting parameters associated with CSI acquisition, such as CQI (Channel Quality Indicator), PMI (Precoding Matrix Index), RI (Rank Indicator), and CRI (CSI-RS Resource Index / Indicator). Other CSI parameters may also be included. Unless otherwise specified, this UCI does not include HARQ-ACK. In this disclosure, for illustrative purposes, this UCI may also be referred to as CSI-UCI.

[0124] This disclosure includes the following components for enabling UCI generation and multiplexing and CSI reporting. The first component of this disclosure relates to CSI reporting units in the frequency domain. The second component relates to CRI. The third component relates to periodic and / or semi-persistent CSI reporting (P-CSI and / or SP-CSI respectively). The fourth component relates to aperiodic CSI reporting (A-CSI).

[0125] All of the following components and embodiments apply to UL transmissions using CP-OFDM (Cyclic Prefix OFDM) waveforms as well as DFT-SOFDM (DFT-Spread OFDM) and SC-FDMA (Single Carrier FDMA) waveforms. Additionally, all of the following components and embodiments apply to UL transmissions when the scheduling unit is a subframe (which may include one or more time slots) or a time slot in time.

[0126] For the first component (i.e., CSI reporting unit), the frequency resolution (reporting granularity) and span (reporting bandwidth) of CSI reporting can be defined as "subbands" and "CSI Reporting Band (CRB)" respectively in terms of frequency. The term "CSI Reporting Band" is used for illustrative purposes. Different terms representing the same set of functions may also be used.

[0127] The subbands for CSI reporting are defined as a set of consecutive PRBs, which represent the smallest frequency unit for CSI reporting. For a given DL system bandwidth value, the number of PRBs in a subband can be fixed, semi-statically configured via higher layer / RRC signaling, or dynamically configured via L1 DL control signaling or MAC control element (MAC CE). The number of PRBs in a subband can be included in the CSI reporting setup.

[0128] The "CSI reporting band" is defined as a set / collection of sub - bands in which CSI reporting is performed, which can be continuous or non - continuous. For example, the CSI reporting band can include all sub - bands within the DL system bandwidth. This can also be referred to as the "full band". Optionally, the CSI reporting band can include only a set of sub - bands within the DL system bandwidth. This can also be referred to as the "partial band".

[0129] The term "CSI reporting band" is only used as an example for representing the function. Other terms such as "CSI reporting sub - band set" or "CSI reporting bandwidth" can also be used.

[0130] In terms of UE configuration, the UE can be configured with at least one CSI reporting band. This configuration can be semi - static (via higher - layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). When configured with multiple (N) CSI reporting bands (such as via RRC signaling), the UE can report CSI associated with n ≤ N CSI reporting bands. For example, a large system bandwidth of > 6 GHz may require multiple CSI reporting bands. The value of n can be configured semi - statically (via higher - layer signaling or RRC) or dynamically (via MAC CE or L1 DL control signaling). Optionally, the UE can report a recommended value of n via the UL channel.

[0131] Therefore, the CSI parameter frequency granularity can be defined as follows according to the CSI reporting band. When one CSI parameter is reported for all Mn sub - bands within a CSI reporting band with Mn sub - bands, the CSI parameter is configured to have a "single" report for the CSI reporting band. When one CSI parameter is reported for each of the Mn sub - bands within a CSI reporting band with Mn sub - bands, the CSI parameter is configured to have a "sub - band" for the CSI reporting band.

[0132] Figure 5 Several examples of CSI reporting band configurations are shown. In these examples, one sub - band includes 4 PRBs. In the CSI reporting band configuration 500, the UE is configured with one CSI reporting band 0 (501), which spans the entire DL system bandwidth (including N SBsub-bands). In CSI report band configuration 550, the UE is configured with two CSI report bands. The first CSI report band 0 (551) includes 3 sub-bands, while the second CSI report band 1 (552) includes 2. For CSI report band configuration 550, the UE can be further configured or requested to report CSI for either report band (551 or 552) or both. The two report bands can be associated with a common / joint CSI report setting or two separate CSI report settings. Thus, the two CSI report bands can be associated with different configurations (such as frequency granularity, periodicity / semi-persistence / aperiodicity) or different RS settings for CSI acquisition.

[0133] For the second component (i.e., CRI or CSI-RS resource index report), the UE can be configured with K ≥ 1 non-zero power (NMP) CSI-RS resources within one CSI-RS or RS setting. When K > 1, the UE can be configured with CRI reporting. The CRI can be configured as a "single" report, i.e., one CRI for one CSI report band. Here, the CRI is an indicator that recommends selecting K A (≤K) out of K CSI-RS resources. The CRI can be used for the purposes of CSI acquisition and beam management. The CRI report can also be accompanied by at least one CSI-RSRP (CSI-RS received power, or optionally referred to as "beam intensity indicator" or "beam-RSRP"), where each CSI-RSRP corresponds to at least one CSI-RS resource.

[0134] When the UE is configured with CRI reporting, some embodiments (selection 1-1, 1-2, 2-1, 2-2, 3-1, and 3-2) regarding the subset of CSI-RS resources configured for CRI reporting can be described in Table 1. Each of these embodiments can be used independently. Optionally, at least two of these embodiments can be used in combination with each other (such as combining selection 1-1 or 1-2 with selection 2-1 or 2-2). The option embodiments start with a UE configured with K TOT NZP CSI-RS resources via higher layer (RRC) signaling in one RS setting.

[0135] Table 1. CRI report configuration

[0136]

[0137]

[0138] When the UE is configured with CRI reporting, the CRI report can be multiplexed with other CSI parameters such as CQI, PMI, and / or RI. Several embodiments related to this issue can be described below.

[0139] In one embodiment (MUX-0), the CRI is reported separately (separate from other CSI parameters), and is measured from an RS / CSI-RS setting different from the RS / CSI-RS setting associated with CQI / PMI / RI (similar to the CSI-RS resource configuration in LTE). The RS setting for CRI calculation / reporting can include K > 1 NZP CSI-RS resources. The separate RS setting for CQI / PMI / RI calculation / reporting can include only 1 NZP CSI-RS resource. In this case, the CRI is reported in a subframe / slot different from at least one of CQI, PMI, and RI.

[0140] In another embodiment (MUX-1), the CRI is multiplexed with CQI, PMI, and / or RI (reported together), and is measured from the RS / CSI-RS setting associated with CQI / PMI / RI. This RS / CSI-RS setting can include K > 1 NZP CSI-RS resources. In this case, the CRI can be reported in the same subframe / slot as CQI / PMI / RI. If the CRI is configured with K A = 1, then the CQI / PMI / RI is calculated by measuring only one of the K > 1 NZP CSI-RS resources. Optionally, if KA > 1, then K A sets of CQI / PMI / RI are included in the CSI report.

[0141] Compared to MUX-1, MUX-0 allows the UE to average over a smaller number of CSI-RS resources ("beams").

[0142] As previously mentioned, for each of the K A CSI-RS resource indices indicated in the CRI, at least one CSI-RSRP (or beam-RSRP) can also be reported. This CSI-RSRP can be regarded as a type of CQI or CSI parameter. When the UE is also configured with CSI-RSRP reporting in addition to CRI reporting, several embodiments can be described as follows. In one embodiment, the K A CSI-RSRPs associated with the K A CSI-RS resources ("beams") are reported in combination with the CRI. In another embodiment, among the K A CSI-RS resources indicated by the CRI, the CSI-RSRP is given only for a subset of these resources (such as M ≤ K A CSI-RS resources, where M can be fixed or configured by the network or selected by the UE). In another embodiment, representing all K AOnly one CSI-RSRP of a CSI-RS resource (“beam”), such as an average RSRP, a minimum RSRP, or a median RSRP across K CSI-RS resources, is reported in combination with a CRI. In another embodiment, only two CSI-RSRPs representing a maximum and a minimum CSI-RSRP, a maximum and an average CSI-RSRP, or an average and a minimum CSI-RSRP are reported in combination with a CRI. A When the UE is configured to report a CRI together with M ≤ K CSI-RSRPs associated with M ≤ K CSI-RS resources (where the value of M is fixed or configured by the network), the CRI and the M CSI-RSRPs can be concatenated to form a UCI codeword as shown. This UCI codeword 600 is a bit sequence (which includes a bit sequence for the CRI 601 and a bit sequence for the M CSI-RSRPs 602) a

[0143] 、a A 、a A 、a Figure 6 、...、a 0 、a 1 、a 2 、a 3 、...、a A-1 ,where a 0 corresponds to the first bit of the CRI field in the UCI codeword 600, a 1 corresponds to the second bit of the CRI field in the UCI codeword 600, and a A-1 corresponds to the last bit of the last CSI-RSRP field (CSI-RSRP M-1) in the UCI codeword 600.

[0144] For a third component (i.e., periodic and semi-persistent CSI), semi-persistent CSI (SP-CSI) is functionally the same as P-CSI, except that SP-CSI requires activation (either via RRC signaling, MAC CE, or L1 DL control signaling) to start and requires deactivation / release to stop.

[0145] In the present disclosure, P-CSI / SP-CSI is designed in a way to avoid or minimize inter-subframe / inter-slot dependencies. When using single CW layer mapping, one CQI representing all layers in one CW can be used for a given reporting unit in the frequency domain. Thus, the CQI payload (whether one CQI per CSI reporting band or sub-band CQI) is independent of the RI value. In addition, if P-CSI / SP-CSI is used for low-resolution feedback (such as link maintenance) - such as type I CSI in NR with one CQI and one PMI for all sub-bands in a CSI reporting band - the total CSI payload can be easily fitted within one UL reporting subframe / slot.

[0146] In one embodiment, P-CSI / SP-CSI includes a single CSI report for each CSI reporting band, which includes: a single RI representing all subbands in the configured CSI reporting band, a single CQI representing all L layers (where RI represents the recommended rank L) and all subbands in the configured CSI reporting band, and a single set of PMIs representing all subbands in the configured CSI reporting band. The single set of PMIs can consist of one precoder index parameter i, or of two precoder indices (first and second PMI) i 1 and i 2 and even consist of more precoder indices. In addition, the first PMI can consist of one precoder index, or of two precoder indices i 1，1 and i 1，2 (e.g., for a two-dimensional codebook). The above CQI, PMI, and RI are reported in one UL subframe / slot. The UE calculates the PMI conditional on the reported RI in the same subframe / slot. Similarly, the UE calculates the CQI conditional on the reported PMI and RI in the same subframe / slot.

[0147] In a variant of the above embodiment, a single CSI reporting parameter is used to represent a joint hypothesis for the PMI and RI. For illustrative purposes, this CSI reporting parameter can be referred to as R-PMI, and its payload is bits, where Hr is the number of precoder hypotheses associated with rank r, and R MAx is the maximum number of layers (value of the rank) configured for the UE. An example of R-PMI is given in Table 2, where bits are used, and the remaining hypotheses (if any) are reserved, possibly for other / future uses. The single set of PMIs can consist of one precoder index parameter i, or of two precoder indices (first and second PMI) i 1 and i 2 and even consist of more precoder indices. In addition, the first PMI can consist of one precoder index, or of two precoder indices i 1，1 and i 1，2 and. Thus, the PMI hypotheses in Table 2 can represent pairs of i, (i 1 , i 2 ), (i 11 , i 12 , i 2) assumption. Such a scheme using combined assumptions allows for potentially more efficient minimization of the P-CSI / SP-CSI payload, especially when the number of PMI assumptions varies across different RI values (which is typically the case).

[0148] Table 2. Example of R-PMI definition

[0149]

[0150]

[0151] In a variant of the above embodiment, when, in addition to the 1-CW layer mapping for lower ranks (such as ranks 1-4, or optionally, ranks 1-2), a 2-CW layer mapping is used for higher ranks (such as ranks 5-8, or optionally, ranks 3-8), a single CQI representing all layers in one CW or two CWs can be used for a given reporting unit in the frequency domain. Thus, regardless of the number of CWs, the CQI payload (whether one CQI per CSI reporting band or sub-band CQIs) can still be independent of the RI value. In this case, as described in the previous paragraphs above, a single CSI reporting parameter is used to represent the combined assumptions for PMI and RI. For P-CSI / SP-CSI, the CSI report includes a single CSI report for each CSI reporting band, which includes: a single RI representing all sub-bands in the configured CSI reporting band, a rank of a single CQI representing all L layers (where RI indicates the recommended rank L) and all sub-bands in the configured CSI reporting band, and a single PMI set representing all sub-bands in the configured CSI reporting band.

[0152] In another embodiment, when the UE is configured with CRI reporting, there are two options whether the same CSI-RS resource (MUX-1 in component 2) or two different CSI-RS resources (MUX-0 in component 2) are used to calculate the CRI and CQI / PMI / RI. In the first option (selection 0), the CRI can be reported separately from the CQI / PMI / RI (such as in a different set of subframes / slots). For MUX-0, this option is more natural. In the second option (selection 1), the CRI is reported together with the CQI / PMI / RI (in the same set of subframes / slots). As mentioned previously for component 2, for each of the K A CSI-RS resource indices indicated in the CRI, at least one CSI-RSRP (or beam-RSRP) can also be reported.

[0153] In another embodiment, when the UE is configured with a DL or UL grant indicating 2 CWs, the total payload (including RI, PMI, and CQI) for this case can remain the same. The number of bits allocated for reporting R1 here remains unchanged. However, since one CQI is used for each CW, only one CQI field (CQI-1) is included when L ≤ 4. However, since the number of CWs is 2, two CQI fields (CQI-1 and CQI-2) can be included. The second CQI CQI-2 can be reported as a full CQI or as a differential CQI with respect to the first CQI CQI-1. In Figure 6 An example is shown in diagram 610 of

[0154] When the UE is configured to report CSI for more than one (M > 1) DL component carrier (CC) in the case of carrier aggregation (CA), the CSI-UCI connections associated with the bit sequences for the M different DL CCs (CC 0 |CC 1 |...|CC M-1 ) can become one UCI codeword that will be encoded using a channel coding block.

[0155] Each of the embodiments described for component 3 is (generally) applicable to CSI reporting with an appropriately small payload - periodic, semi-persistent, or aperiodic; wideband / partial band (one report for each configured CSI reporting band) or sub-band (one report for each sub-band within the configured CSI reporting band). The associated CSI-UCI can be transmitted via a UL control channel separate from the PUSCH (similar to the PUCCH for LTE) or the PUSCH itself by allocating a small number of PRBs or a fraction of a PRB (a set of subcarriers within one PRB and / or a set of OFDM symbols within one time slot). The second option (transmission on the PUSCH) can be accomplished regardless of whether the CSI-UCI is multiplexed with UL-SCH data.

[0156] For the fourth component (i.e., aperiodic CSI), the aperiodic CSI (A-CSI) accommodates different frequency granularities for the CQI and PMI (for all N in the configured CSI reporting band) SBa report for each subband, or a report for each subband in the configured CSI report). However, the RI and CRI (and their associated CSI-RSRP) are reported only at one frequency granularity (for all N subbands in the configured CSI report band) SB a report).

[0157] Additionally, if single CW layer mapping is used, the CQI payload is independent of the RI value. However, the PMI payload may depend on the RI value. For example, for type I (normal) CSI with lower spatial resolution, the PMI payload can be made independent of the RI or less dependent on the RI value. For type II (enhanced) CSI with higher spatial resolution, the PMI payload can be RI-dependent (e.g., the PMI payload can be proportional to the RI value with per-layer quantization / feedback). However, regardless of whether single CW layer mapping is used, the following embodiments can be utilized. For example, they are also applicable to layer mapping using up to 2 CWs (such as the layer mapping for LTE).

[0158] In one embodiment (scheme 0) of the present disclosure, all reported CSI parameters are jointly encoded into one codeword. After code block (CB) CRC insertion (or possible CB segmentation), this codeword is the input to the channel coding block. When reporting CQI, PMI, and RI, this embodiment is shown in Figure 7 FIG. 700. An example use case of this embodiment is when only one PMI is reported for the entire CSI report band (CRB), i.e., "wideband" or "partial band" PMI reporting (for type I CSI, type II CSI, or both types). In this case, the PMI and RI can be jointly indicated as discussed in component 3. Therefore, the CQI can be jointly encoded with the PMI and RI. Scheme 0 can also be used when the UE is configured with a CRI report, or a CRI report together with at least one CSI-RSRP, or a quality metric (including CQI) commonly used for beam management.

[0159] In another embodiment (scheme 1) of the present disclosure, when the UE is configured with an RI report, the RI is encoded separately (code field 1), while the other reported CSI parameters are jointly encoded into one code field (code field 2). After code block (CB) CRC insertion (or possible CB segmentation), this code field 2 is the input to the channel coding block. Code field 1 is the input to another channel coding block. Since code field 1 is short, CRC can be added or not added. This embodiment is shown in Figure 8 FIG. 800 (where the modulation mapper is applied to each segment before multiplexing) and FIG. 850 (where the modulation mapper is applied after multiplexing the two segments).

[0160] In another embodiment of the present disclosure (Scenario 2), when the UE is configured with RI reporting, the RI and at least one other CSI parameter (whose payload is independent of the RI value) are jointly encoded to form Code Field 1. After Code Block (CB) CRC insertion (or possible CB segmentation), this Code Field 1 is the input to the channel coding block. The other remaining CSI parameters are jointly encoded to form another Code Field 2. After Code Block (CB) CRC insertion (or possible CB segmentation), this Code Field 2 is the input to the channel coding block.

[0161] Compared with Scenario 1 and Scenario 3 (described later) in which the RI is also encoded separately from at least one other CSI parameter, Scenario 2 allows the RI (whose payload is typically small) to be jointly encoded with at least one other CSI parameter, such that the payload of Code Field 1 is large enough to justify CRC insertion after channel coding. With the CRC, the gNB can perform error detection when receiving the CSI-UCI transmission from the UE to reliably check whether the CSI-UCI has been successfully decoded. As previously mentioned, error detection of the RI can be catastrophic.

[0162] In a variant (Scenario 2A) of the previous embodiment (Scenario 2) of the present disclosure, when the UE is configured with RI reporting, the RI and the CQI are jointly encoded to form Code Field 1. After Code Block (CB) CRC insertion (or possible CB segmentation), this Code Field 1 is the input to the channel coding block. The PMI (all parameters related to the PMI) are jointly encoded to form another Code Field 2. After Code Block (CB) CRC insertion (or possible CB segmentation), this Code Field 2 is the input to the channel coding block. This embodiment is shown in Figure 9a Illustration 900 (where the modulation mapper is applied to each segment before multiplexing) and Figure 901 (where the modulation mapper is applied after multiplexing two segments) therein. An example use case of this embodiment is when reporting Type II CSI with one PMI report (i.e., "wideband" or "partial band" PMI) for all subbands in the CSI reporting band. In this case, although the PMI payload is one report, it is still reasonably large and can be encoded separately from the CQI and RI (as Code Field 2). Another example use case of this embodiment is when reporting subband PMI (regardless of Type I / II, single-stage or two-stage PMI).

[0163] In a variant (Scheme 2B) of a previous embodiment (Scheme 2) of the present disclosure, the CSI parameters included in the PMI are divided into two parts: PMI Part I and PMI Part II. When the UE is configured with RI reporting, the RI, CQI, and PMI Part I are jointly encoded to form Code Field 1. After code block (CB) CRC insertion (or possibly CB segmentation), this Code Field 1 is the input to the channel coding block. PMI Part II is jointly encoded to form another Code Field 2. After code block (CB) CRC insertion (or possible CB segmentation), this Code Field 2 is the input to the channel coding block. This embodiment is shown in Figure 9b Illustration 910 (where the modulation mapper is applied to each segment before multiplexing) and Illustration 911 (where the modulation mapper is applied after multiplexing two segments).

[0164] Some sub - embodiments of Scheme 2B can be described as follows.

[0165] In the first sub - embodiment of Scheme 2B, PMI Part I includes PMI reporting parameters associated with the first layer, while PMI Part II includes PMI reporting parameters associated with the second layer to the last layer (RI = L, this layer corresponds to the L - th). This embodiment is particularly relevant to Type II CSI when PMI can be defined for each layer.

[0166] In the second sub - embodiment of Scheme 2B, PMI Part I includes PMI reporting parameters associated with the first or first - level (broadband) PMI parameter i 1 or (i 11 , i 12 ) (which is common for all layers), while PMI Part II includes PMI reporting parameters associated with the second or second - level PMI parameter i 2 (which is RI - dependent). This embodiment is relevant to both Type I and Type II CSI when the PMI payload depends on the value of RI. In an example use - case of this sub - embodiment (where the PMI frequency granularity is per sub - band), the RI and the first or first - level (broadband) PMI parameter i 1 or (i 11 , i 12 ) - one i1 report for each CSI reporting band, regardless of the PMI frequency granularity - can be jointly indicated as described in Component 3. The second or second - level PMI parameter i 2 (which is RI - dependent) can be reported per sub - band.

[0167] In the third sub - embodiment of Scheme 2B, PMI Part I includes the first or first - level (broadband) PMI parameter i associated with the first layer 1 or (i 11 , i12 (which is common to all layers), and a second or second - level PMI parameter i 2 associated PMI reporting parameters. PMI section II includes the second or second - level PMI parameter i associated with the second layer to the last layer (RI = L, this layer corresponds to the L - th), 2 associated PMI reporting parameters. When PMI can be defined per layer, this embodiment is particularly relevant to type II CSI.

[0168] For scheme 2 / 2A / 2B, it is expected that each of the two code fields is large enough. Therefore, polar codes or TBCC can be used. Regarding CRC insertion for the two code fields, L CRC bits of CRC can be inserted into each of the two code fields before channel coding (this results in two separate CRC insertions). If the size of the segment is large enough such that code block / CB segmentation needs to be performed, L CRC bits of CRC can be inserted into each of the CBs. Optionally, only one L CRC bit of CRC can be used for the two code fields (thus for the joint CRC of segments 1 and 2). In this case, CRC insertion is performed before segmenting the CSI - UCI codeword into two. Similarly, if the size of the CSI - UCI codeword is large enough such that code block / CB segmentation needs to be performed, L CRC bits of CRC can be inserted into each of the CBs.

[0169] For scheme 2 / 2A / 2B, the gNB can first decode code field 1 (which includes RI) before segment 2 (whose size is RI - dependent). Based on the decoded RI value, the payload size of segment 2 is known. Additionally, if at least one L CRC bit of CRC is inserted into code field 1, the gNB can check whether segment 1 is successfully decoded. This increases the reliability of the gNB's inference of the payload size of segment 2.

[0170] For scheme 2 / 2A / 2B, when the UE is configured with CRI reporting (with or without CSI - RSRP), CRI or CRI + CSI - RSRP can be included in code field 1, i.e., jointly encoded with RI and at least one other CSI parameter whose payload size is independent of the RI value.

[0171] In another embodiment (scheme 3) of the present disclosure, when the UE is configured with RI reporting, RI is encoded to form code field 1, CQI is encoded to form code field 2, and PMI is encoded to form code field 3. After code block (CB) CRC insertion and / or CB segmentation, each of the three code fields may be an input to a channel - coding block. This embodiment is inFigure 10 are shown in Diagram 1000 (where the modulation mapper is applied to each segment before multiplexing) and Diagram 1001 (where the modulation mapper is applied after multiplexing two segments) in. The channel coding and CRC insertion for Scheme 3 follow the channel coding and CRC insertion for Scheme 2 / 2A / 2B by extending the description for 3 code fields.

[0172] In a variant of any of the above-described embodiments 0 / 1 / 2 / 2A / 2B / 3, when, in addition to 1-CW layer mapping for lower ranks (such as ranks 1-4, or optionally, ranks 1-2), 2-CW layer mapping is used for higher ranks (such as ranks 5-8, or, optionally, ranks 3-8), one CQI representing all layers in one CW or two CWs can be used for a given reporting unit in the frequency domain. Thus, regardless of the number of CWs, the CQI payload (whether one CQI per CSI reporting band or subband CQI) can still be independent of the RI value. In this case, as described in the previous paragraphs above, a single CSI reporting parameter is used to represent the joint hypothesis for PMI and RI. For P-CSI / SP-CSI, the CSI report includes a single CSI report for each CSI reporting band, which includes a single RI representing all subbands in the configured CSI reporting band, a single CQI representing all L layers (where RI indicates the recommended rank L) and all subbands in the configured CSI reporting band, and a single set of PMIs representing all subbands in the configured CSI reporting band.

[0173] Another embodiment (Scheme 4) of the present disclosure can be used when, in addition to 1-CW layer mapping for lower ranks (respectively, when RI ≤ x, such as RI ≤ 4, or optionally, when RI ≤ 2), 2-CW layer mapping is used for higher ranks (when RI > x, such as RI > 4, or optionally, when RI > 2). In this case, depending on the value of RI, the number of CWs can change between 1 and 2. When the RI value implies using 2 CWs, different CQIs can be used for the two different CWs (that is, CQI-1 is used for the first CW, and when RI > x, CQI-2 is used for the second CW). In other words, when RI ≤ x (such as RI ≤ 4, or optionally, RI ≤ 2), one CQI (CQI-1) representing one CW is reported. Otherwise, when RI > x (such as RI > 4, or optionally, RI > 2), two CQIs (CQI-1 and CQI-2) representing two CWs are reported. Two sub-embodiments of Scheme 4 are shown in Figure 11a and Figure 11b are shown.

[0174] In Figure 11aIn the sub - embodiment shown, the CSI parameters included in the PMI are divided into two parts: PMI part I and PMI part II. Thus, the descriptions of different examples of PMI part I and part II from schemes 2 / 2A / 2B can be applied. When the UE is configured with RI reporting, RI, CQI - 1, and PMI part I are jointly encoded to form code field 1. After code block (CB) CRC insertion (or possible CB segmentation), this code field 1 is the input to the channel - coding block. When RI > x (see above), PMI part II is jointly encoded with CQI - 2 to form another code field 2. Otherwise, when RI ≤ x, PMI part II is encoded (by itself) to form another code field 2. After code block (CB) CRC insertion (or possible CB segmentation), code field 2 is the input to the channel - coding block. This embodiment is shown in Figure 11a FIG. 1100 (where the modulation mapper is applied to each segment before multiplexing) and FIG. 1101 (where the modulation mapper is applied after multiplexing two segments) in

[0175] In Figure 11b the sub - embodiment shown, the CSI parameters included in the PMI are encoded together. When the UE is configured with RI reporting, RI and CQI - 1 are jointly encoded to form code field 1. After code block (CB) CRC insertion (or possibly CB segmentation), this code field 1 is the input to the channel - coding block. When RI > x (see above), PMI is jointly encoded with CQI - 2 to form another code field 2. Otherwise, when RI ≤ x, PMI is encoded (by itself) to form another code field 2. After code block (CB) CRC insertion (or possible CB segmentation), this code field 2 is the input to the channel - coding block. This embodiment is shown in Figure 11b FIG. 1110 (where the modulation mapper is applied to each segment before multiplexing) and FIG. 1111 (where the modulation mapper is applied after multiplexing two segments) of

[0176] In another sub - embodiment applicable to type II with rank 1 - 2, in addition to the first PMI (PMI part 1) i 1 beam amplitude / power coefficients can also be reported separately. Based on the value of such (wideband) beam amplitude / power coefficients, the sub - band reporting payload can be adjusted. In one example, when some of the beam amplitude / combination coefficients are zero, the total sub - band reporting payload can be reduced by not reporting sub - band parts such as amplitude / power coefficients (when the UE is configured to report sub - band beam amplitude / power coefficients in addition to wideband beam amplitude / power coefficients). Here, the value of L can be configured via higher - layer signaling or MAC CE. However, when some of the wideband amplitude / power coefficients can be zero, the total reported CSI changes dynamically.

[0177] Thus, the first segment can carry CSI parameters that are not affected by RI and / or the number of non-zero wideband amplitude / power coefficients, such as the wideband amplitude / power coefficient for the first layer (Amp-1, which includes an indicator of the strongest / leading coefficient for the first layer), along with RI (maximum value is 2), CQI (since the maximum rank is 2, only one CQI is reported), and the first PMI (the first PMI reported as a wideband CSI parameter). 1 , denoted as PMI part 1). The second section includes the second PMI (i that can be reported for each subband and each layer). 2 , denoted as PMI part 2), the wideband amplitude / power coefficient for the second layer (if RI=2, Wideband Amp-2, which includes an indicator of the strongest / leading coefficient for the second layer), and the subband part of the amplitude / power coefficient (Subband Amp-1 for the first layer, if RI=2, Subband Amp-2 for the second layer, when the UE is configured to report subband beam amplitude / power coefficients in addition to the wideband beam amplitude / power coefficients). This is in Figure 11c This is shown in FIG1120 .

[0178] Optionally, a wideband amplitude / power coefficient for the second layer (Wideband Amp-2, which includes an indicator of the strongest / leading coefficient for the second layer) can be included in the first segment, such as Figure 11c As shown in diagram 1121 of (starting from the payload of this wideband report). In this case, since the payload for the first segment will remain the same regardless of the value of RI (1 or 2), the payload of the first segment is determined or provided assuming RI=2.

[0179] The embodiments shown in diagrams 1120 and 1121 can be extended when Type I is supported for ranks 1, 2, 3, and 4. Those skilled in the art can infer this extension.

[0180] In another sub-embodiment shown in diagram 1122 (a variation of the previous embodiment shown in diagram 1121) applicable to type II with rank 1-2, in addition to the first PMI (PMI part 1) i 1 In addition, the beam amplitude / power coefficient can also be reported separately. Based on the value of such (wideband) beam amplitude / power coefficient, the subband report payload can be adjusted. In an example, when some of the beam amplitude / combination coefficients are zero, the total subband report payload can be reduced by not reporting, for example, the subband part of the amplitude / power coefficient (when the UE is configured to report the subband beam amplitude / power coefficient in addition to the wideband beam amplitude / power coefficient). Here, the value of L can be configured via higher layer signaling or MAC CE. However, when some of the wideband amplitude / power coefficients can be zero, the total reported CSI changes dynamically.

[0181] In this exemplary embodiment, the wideband amplitude / power coefficients associated with both the first layer and the second layer (wideband Amp-1, which includes an indicator for the strongest / leading coefficient of the first layer, and wideband Amp-2, which includes an indicator for the strongest / leading coefficient of the second layer) can be included in the first segment, as shown in Figure 11c Illustration 1122 (starting from the payload of this wideband report). These two sets of coefficients are included regardless of the value of RI. However, RI is not included or reported - rather, RI can be inferred from the values of wideband Amp-1 and / or wideband Amp-2. For example, if the 2L amplitude coefficients corresponding to wideband Amp-2 are zero, it can be assumed that RI = I. Or similarly, if the 2L amplitude coefficients corresponding to wideband Amp-1 are zero, it can be assumed that RI = 1.

[0182] In this case, since the payload for the first segment will remain the same regardless of the value of RI (1 or 2), the payload for the first segment is determined or provided assuming RI = 2.

[0183] In another sub - embodiment applicable to type II with rank 1 - 2, Figure 11d shown in Illustration 1130 in Figure 11c a variant of the previous embodiment shown in Illustration 1121 in

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[0184] a variant of the previous embodiment shown in Illustration 1121 in [[ID=1In this exemplary embodiment, the wideband amplitude / power coefficients associated with both the first layer and the second layer (wideband Amp-1, which includes an indicator for the strongest / leading coefficient for the first layer, and wideband Amp-2, which includes an indicator for the strongest / leading coefficient for the second layer) can be included in the second segment (portion 2), as Figure 11d shown in illustration 1130 of

[0185] starting from the payload of this wideband report that varies with the reported RI). Figure 11d Optionally, as shown in illustration 1131 of

[0186] In a type II applicable to ranks 1-2, Figure 11d in another sub-embodiment shown in illustration 1132 of Figure 11c (a variant of the previous embodiment shown in illustration 1121 of

[0187] In this exemplary sub-embodiment, the wideband amplitude / power coefficient associated with the first layer (wideband Amp-1, which includes an indicator for the strongest / leading coefficient for the first layer) is included in the first segment (portion 1). Thus, the payload reported in portion 1 is fixed. The wideband amplitude / power coefficient associated with the second layer (wideband Amp-2, which includes an indicator for the strongest / leading coefficient for the second layer) is included in the second segment (portion 2), as Figure 11dAs shown in the illustration 1132. Since the payload of this wideband report (part 2) varies according to the RI of the report, if RI = 1, part 2 is not reported, and if RI = 2, the wideband amp-2 for the second layer (included in part 2) is reported. On the other hand, part 3 is reported.

[0188] Optionally, as Figure 11e shown in the illustration 1133, part 1 includes RI, CQI, and wideband Amp-1, while part 2 includes the PMI part 1 and wideband Amp-2 in parts 1 and 2 (wideband Amp-2 is included only when RI = 2, otherwise only the PMI part 1 is included).

[0189] In the previous embodiments of the type II CSI report (shown in illustrations 1121 - 1133), the PMI part 1 (i 1 ) indicates the following two components: 1) the rotation factor (q 1 , q 2 ), where q1, q2 ∈ {0, 1, 2, 3}, which corresponds to 16 combinations (thus requiring a 4-bit report), 2) the selection of L orthogonal beams, which are either joint bits or independent bits for each beam. These two components are reported jointly or separately as the two components of the PMI part 1.

[0190] In the above embodiments of the type II CSI report (shown in illustrations 1121 - 1133), the wideband Amp-1 and wideband Amp-2 can also be referred to as RPI 0 and RPI 1 , where RPI represents the relative power indicator. In addition, RPI 0 indicates the wideband (WB) amplitude of the strongest / leading coefficient for the first layer and the remaining (2L - 1) coefficients for the first layer At the same time, RPI1 indicates the wideband (WB) amplitude of the strongest / leading coefficient for the second layer and the remaining (2L - 1) coefficients for the second layer

[0191] The strongest / leading coefficients for the first layer and the second layer can also be referred to as SCI 0 and SCI 1 , where SCI represents the strongest coefficient indicator. In a variant, SCI 0 and SCI 1 can also be reported separately from the wideband (WB) amplitude for these two layers. In this case, RPI 0 and RPI 1 indicate the WB amplitude of the remaining (2L - 1) coefficients for these two layers.

[0192] In the above embodiment regarding the type II CSI report (shown in FIGS. 1121 - 1133), sub - band Amp - 1 and sub - band Amp - 2 may also be referred to as SRPI0 and SRPI1, where SRPI represents the sub - band relative power indicator. Additionally, SRPI 0 indicates the sub - band (SB) amplitude for the remaining 2L - 1 coefficients of the first layer and SRPI 1 indicates the sub - band (SB) amplitude for the remaining 2L - 1 coefficients of the second layer

[0193] In the above embodiment regarding the type II CSI report (shown in FIGS. 1121 - 1133), the PMI part 2(i 2 ) indicates the SB phase for the 2L - 1 coefficients of each layer. Thus, if RI = 1, the PMI part 2 corresponds to i 2 = i 2，0 for one layer, and if RI = 2, the PMI part 2 corresponds to i 2 =(i 2，0 , i 2，1 ) for two layers.

[0194] For each layer, the SB phase and SB amplitude can also be jointly reported as PMI part 2 - 1 (including i 2，0 for the first layer and SRPI 0 ) and PMI part 2 - 2 (including i 2，1 for the second layer and SRPI 1 ). Figure 11e Two examples (FIGS. 1134 and 1135) are shown.

[0195] In an embodiment regarding the type II CSI report, the PMI includes a first (WB) PMI i 1 and a second (SB) PMI i 2 . The first PMI i 1 =[i 1，1 , i 1，2 , i 1，3 , i 1，4 includes two - layer - common (i.e., if the UE reports RI = 2, reported commonly for both layers) components: 1) an orthogonal basis set (indicated by the index i 1 , q 2 ) that indicates the rotation factor (q 1，1 ); and 2) L beam selection (indicated by the index i 1，2as indicated). In addition, two-layer specific (i.e., if the UE reports RI = 2, reported for each of the two layers) components are reported: 1) the strongest coefficient (using index i 1，3 indicated) and 2) the WB magnitude (using index i 1，4 indicated).

[0196] Index i 1，3 and i 1，1 can be further described as and the second PMI i 2 = [i 2，1 , i 2，2 includes two-layer specific components: 1) the SB phase c 2，1 indicated by using index i l，i ; and 2) the SB magnitude 2，2 indicated by using index i (which can be turned on or off by RRC signaling), where and

[0197] Note that i 1，3，2 , i 1，4，2 , i 2，1，2 , and i 2，1，2 are reported only when RI = 2 is reported. Subscript l ∈ {0, 1} is used for the layer, and subscript i ∈ {0, 1,.., 2L-1} is used for the coefficient. The first PMI is reported in wideband (WB) mode, and the second PMI can be reported in wideband or subband (SB) mode.

[0198] In the embodiment shown in FIG. 1140 applicable to type II with rank 1-2, as Figure 11f shown, two-part UCI multiplexing is used, where CQI, RI, and (N 0，1 , N 0，2 ) are multiplexed and encoded together in part 1, where N 0，1 and N 0，2 respectively indicate (DEF A) the number of reported zero (i.e., ) WB magnitudes for layer 1 and layer 2; or alternatively, they respectively indicate (DEF B) the number of reported non-zero (i.e., ) WB magnitudes for layer 1 and layer 2; the remaining CSI parameters are multiplexed and encoded together in part 2, where the remaining CSI includes the first PMI i1 and the second PMI (i 2 ).

[0199] Based on the reported (N 0，1 , N 0，2) value to determine the CSI report payload (bits) for part 2. In particular, the second PMI i is reported only for the coefficients whose corresponding reported WB magnitude is non-zero 2 components.

[0200] In the embodiment shown in FIG. 1141, which is applicable to type II with rank 1-2, three-part UCI multiplexing is used, where part 1 is the same as in the embodiment shown in FIG. 1140, and parts 2 and 3 include the first PMI i 1 and the second PMI i 2 components. Figure 11f The illustration is shown in (for FIG. 1141 in Table 3).

[0201] Table 3: Options for parts 2 and 3 in the embodiment shown in FIG. 1141

[0202] Option Part 2 Part 3 1141-0 <![CDATA[i 1 > <![CDATA[i 2 > 1141-1 <![CDATA[i 1，3 ,i 1，4 > <![CDATA[i 1，1 ,i 1，2 ,i 2 > 1141-2 <![CDATA[i 1，3 > <![CDATA[i 1，1 ,i 1，2 ,i 1，4 ,i 2 > 1141-3 <![CDATA[i 1，4 > <![CDATA[i 1，1 ,i 1，2 ,i 1，3 ,i 2 >

[0203] For (N 0，1 , N 0，2 ) the number of candidate values for reporting depends on the value of L configured (via RRC). At least one of the following options is used to report (N 0，1 , N 0，2 ). In one option (Option A), where we assume DEFA for (N 0，1 , N 0，2 ), N 0，1 and N 0，2 take values from {0, 1,..., 2L - 1}. In another option (Option B), where we assume DEFA for (N 0，1 , N 0，2 ), N 0，1 and N 0，2 take values from {0, 1,..., 2L - 1}, because the WB magnitude for the strongest coefficient (indicated by i 1，3 ) cannot be zero, so it is excluded from reporting N 0，1 and N 0，2 , and thus the range of values for N 0，1 and N 0，2 can be reduced by 1. In another option (Option C), where we assume DEFB for (N 0，1 , N 0，2 ), N 0，1 and N 0，2 take values from {0, 1,..., 2L - 1}. In another option (Option D), where we assume DEFB for (N 0，1 , N 0，2 ), N0，1 and N 0，2 takes values from {0, 1, ..., 2L - 2}, or optionally from {0, 1, ..., 2L - 1}, because the WB magnitude for the strongest coefficient (indicated by i 1，3 ) is always non - zero, so it is excluded from the reported N 0，1 and N 0，2 (or optionally, it is always included in the reported N 0，1 and N 0，2 ), thus, the range of values of N 0，1 and N 0，2 can be reduced by 1. In one option (Option E), where we assume DEFA for (N 0，1 , N 0，2 ), N 0，1 takes values from {0, 1, ..., 2L - 1}, and if RI = 1, N 0，2 = 2L, and if RI = 2, N 0，2 takes values from {0, 1, ..., 2L - 1}. In one option (Option F), where we assume DEFB for (N 0，1 , N 0，2 ), N 0，1 takes values from {0, 1, ..., 2L} and if RI = 1, N 0，2 = 0, and if RI = 2, N 0，2 takes values from {0, 1, ..., 2L}. It should be noted that the minimum value that N 0，1 and N 0，2 can take is 1, because the strongest coefficient (indicated by i 1，3 ) is always non - zero (equal to 1). Optionally, if the strongest coefficient is excluded from determining (N 0，1 , N 0，2 ), then N 0，1 takes values from {0, 1, ..., 2L - 1}, and if RI = 1, N 0，2 = - 1, and if RI = 2, N 0，2 takes values from {0, 1, ..., 2L - 1}. The previous values for (N 0，1 , N 0，2 ) are assumed in a later embodiment involving Option F. However, the embodiment is general and applies to later values. In one option (Option G), where we assume DEFA for (N 0，1 , N 0，2 ), N 0，1 takes values from {0, 1, ..., P - 1}, and if RI = 1, N 0，2 = P, and if RI = 2, N 0，2Take values from {0, 1, ..., P - 1}. In one option (selection H), where we consider (N 0，1 , N 0，2 ) assuming DEF B, N 0，1 takes values from {2L - P + 1, ..., 2L}, and if RI = 1, N 0，2 = 0, and if RI = 2, N 0，2 takes values from {2L - P + 1, ..., 2L}, where 0 < P ≤ 2L. It should be noted that the minimum values that N 0，1 and N 0，2 can take are 1, because the strongest coefficient (indicated by i 1，3 ) is always non - zero (equal to 1). Optionally, if the strongest coefficient is excluded from the determination of (N 0，1 , N 0，2 ), then N 0，1 takes values from {2L - P, ..., 2L - 1}, and if RI = I, N 0，2 = - 1, and if RI = 2, N 0，2 takes values from {2L - P, ..., 2L - 1}. The previous values for (N 0，1 , N 0，2 ) are assumed in a subsequent embodiment related to selection F. However, the embodiment is general and applicable to subsequent values.

[0204] In an example of selection G and selection H, the value of P is fixed at P = L. Optionally, P is configured via higher - layer (RRC) signaling or more dynamic MAC CE - based or DCI - based signaling.

[0205] In a sub - embodiment of this embodiment, RI and (N 0，1 , N 0，2 ) are reported separately. One bit is used for RI reporting, and if RI = I is reported, then bits (for selections A, C, E, and F) or bits (for selections B and D) or bits (for selections G and H) are used, and if RI = 2 is reported, then bits (for selections A, C, E, and F) or bits (for selections B and D) or bits (for selections G and H) are used.

[0206] In another sub - embodiment of this embodiment (based on selections A to D), RI and (N 0，1 , N 0，2)Jointly reported according to at least one of the following options. In one option, where we assume that option A or option C is selected for (N 0，1 , N 0，2 ) reporting, N 0，1 and N 0，2 take values from {0, 1,..., 2L - 1}. The corresponding joint RI and (N 0，1 , N 0，2 ) reporting tables are shown in Table 4. Optionally, the joint reports are respectively according to the separate tables shown in Tables 5, 6, and 7 for L = 2, 3, and 4. The number of bits to be reported (I) for this joint report is which corresponds to 5 bits, 6 bits, and 7 bits respectively for L = 2, 3, and 4. In one option, where we assume that option B or option D is selected for (N 0，1 , N 0，2 ) reporting, N 0，1 and N 0，2 take values from {0, 1,..., 2L - 2}. The corresponding joint RI and (N 0，1 , N 0，2 ) reporting tables are shown in Table 8. Optionally, the joint reports are respectively according to the separate tables shown in Tables 9, 10, and 11 for L = 2, 3, and 4. The number of bits to be reported (I) for this joint report is which corresponds to 4 bits, 5 bits, and 6 bits respectively for L = 2, 3, and 4.

[0207] Table 4: Joint RI and (N 0，1 , N 0，2 ) reporting tables for all L

[0208]

[0209] Table 5: Joint RI and (N 0，1 , N 0，2 ) reporting tables for L = 2

[0210]

[0211] Table 6: Joint RI and (N 0，1 , N 0，2 ) reporting tables for L = 3

[0212]

[0213] Table 7: Joint RI and (N 0，1 , N 0，2 ) reporting tables for L = 4

[0214]

[0215] Table 8: Joint RI and (N for all L 0，1 , N 0，2 ) Report Table

[0216]

[0217] Table 9: Joint RI and (N for L = 2 0，1 , N 0，2 ) Report Table

[0218]

[0219] Table 10: Joint RI and (N for L = 3 0，1 , N 0，2 ) Report Table

[0220]

[0221]

[0222] Table 11: Joint RI and (N for L = 4 0，1 , N 0，2 ) Report Table

[0223]

[0224] In another sub - embodiment of this embodiment (based on Selection E and Selection F), RI and (N 0，1 , N 0，2 ) are jointly reported according to at least one of the following options. In one option, where we assume Selection E is used for (N 0，1 , N 0，2 ) reporting, the joint RI and (N 0，1 , N 0，2 ) report table is shown in Table 12. Optionally, the joint reports are separate tables shown in Tables 13, 14, and 15 for L = 2, 3, and 4 respectively. The number of bits (I) to be reported for this joint report is which corresponds to 5 bits, 6 bits, and 7 bits for L = 2, 3, and 4 respectively. In one option, where we assume Selection F is used for (N 0，1 , N 0，2 ) reporting, the joint RI and (N 0，1 , N 0，2 ) report table is shown in Table 16. Optionally, the joint reports are separate tables shown in Tables 17, 18, and 19 for L = 2, 3, and 4 respectively. The number of bits (I) to be reported for this joint report is They respectively correspond to 5 bits, 6 bits, and 7 bits for L = 2, 3, and 4.

[0225] Table 12: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0226]

[0227] Table 13: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0228]

[0229] Table 14: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0230]

[0231] Table 15: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0232]

[0233] Table 16: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0234]

[0235] Table 17: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0236]

[0237] Table 18: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0238]

[0239]

[0240] Table 19: Joint RI and (N 0，1 , N 0，2 ) reporting table

[0241]

[0242] In another sub - embodiment of this embodiment (based on Selection G and Selection H), RI and (N 0，1 , N 0，2 ) are jointly reported according to at least one of the following options. In one option, where we assume Selection E is used for reporting (N 0，1 , N 0，2 ), the joint RI and (N 0，1 , N 0，2 ) reporting table is shown in Table 20. Optionally, the joint reports are separate tables shown in Tables 21, 22, and 23 for L = 2, 3, and 4 respectively. The number of bits to be reported (I) for this joint report is which corresponds to 3 bits, 4 bits, and 5 bits for L = 2, 3, and 4 respectively. In one option, where we assume Selection F is used for reporting (N 0，1 , N 0，2 ), the joint RI and (N 0，1 , N 0，2 ) reporting table is shown in Table 24. Optionally, the joint reports are separate tables shown in Tables 25, 26, and 27 for L = 2, 3, and 4 respectively. The number of bits to be reported (I) for this joint report is which corresponds to 3 bits, 4 bits, and 5 bits for L = 2, 3, and 4 respectively.

[0243] Table 20: Joint RI and (N 0，1 , N 0，2 ) reporting table for all L

[0244]

[0245] Table 21: Joint RI and (N 0，1 , N 0，2 ) reporting table for P = L = 2

[0246]

[0247] Table 22: Joint RI and (N 0，1 , N 0，2 ) reporting table for P = L = 3

[0248]

[0249] Table 23: Joint RI and (N 0，1 , N 0，2 ) reporting table for P = L = 4

[0250]

[0251] Table 24: Joint RI and (N for all L 0，1 , N 0，2 ) report form

[0252]

[0253] Table 25: Joint RI and (N for P = L = 2 0，1 , N 0，2 ) report form

[0254]

[0255] Table 26: Joint RI and (N for P = L = 3 0，1 , N 0，2 ) report form

[0256]

[0257] Table 27: Joint RI and (N for P = L = 4 0，1 , N 0，2 ) report form

[0258]

[0259] In the embodiment shown in FIG. 1150, which is applicable to type II with rank 1-2, as shown in Figure 11g , two-part UCI multiplexing is used, where the two parts are the same as the embodiment shown in FIG. 1140, except that RI is not explicitly reported in part 1. The reported (N 0，1 , N 0，2 ) is used to implicitly obtain RI. Specifically, the reported N 0，2 value is used to obtain the RI value according to at least one of the following options. In one option, assume that E is selected for the (N 0，1 , N 0，2 ) report. If N 0，2 = 2L, then RI = 1; otherwise (N 0，2 ∈ {0, 1,.., 2L - 1},) RI = 2. In another option, assume that F is selected for the (N 0，1 , N 0，2 ) report. If N 0，2 = 0, then RI = 1; otherwise (N 0，2 ∈ {0, 1,.., 2L},) RI = 2. In another option, assume that G is selected for the (N 0，1 , N 0，2 ) report. If N 0，2 = P, then RI = 1; otherwise (N 0，2∈ {0, 1, .., P - 1}), RI = 2. In another option, assume that H is selected for (N 0，1 , N 0，2 ) reporting. If N 0，2 = 0, then RI = 1; otherwise (N 0，2 ∈ {2L - P + 1, .., 2L}), RI = 2.

[0260] In the embodiment shown in FIG. 1151, which is applicable to type II with rank 1 - 2, as Figure 11g shown, three - part UCI multiplexing is used, where the three - part is the same as the embodiment shown in FIG. 1141 (with four options in Table 3), except that RI is not explicitly reported in part 1. The reported (N 0，1 , N 0，2 ) is used to implicitly obtain RI. Specifically, the reported N 0，2 value is used to obtain the RI value according to at least one of the options in the embodiment shown in FIG. 1150.

[0261] In another embodiment, which is a variant of the embodiment shown in FIG. 1140, instead of reporting (N 0，1 , N 0，2 ) for the number of zero or non - zero WB amplitudes, a bitmap B is used to report indicators for each WB amplitude. The bitmap B is the concatenation of two bitmaps, i.e., B = B 0 B 1 or B 1 B 0 , where bitmap B 0 = b 0，0 b 0，1 ..b 0，2L-1 and bitmap B 1 = b 1，0 b 1，1 ..b 1，2L-1 each have a length of 2L. If bit b i，j = 0, then the corresponding WB amplitude is zero, and if bit b i，j = 1, then the corresponding WB amplitude is non - zero. Optionally, if bit b i，j = 0, then the corresponding WB amplitude is non - zero, and if bit b i，j = 1, then the corresponding WB amplitude is zero. Examples of bitmaps for RI = 1 and 2 are shown in Table 28. Thus, the number of bits used to report RI = 1 or 2 and the WB amplitude bitmap B is 4L + 1, which corresponds to 9 bits, 13 bits, and 17 bits for L = 2, 3, and 4 respectively. Once CSI part 1 is decoded, the PMI in CSI part 2 (i 1 and i 2) The reported component is fixed because only the components of the PMI corresponding to non-zero WB amplitudes need to be reported.

[0262] By replacing the (N 0，1 , N 0，2 ) report with a WB amplitude bitmap B report, this embodiment is also applicable to variants of the embodiments shown in FIGS. 1140, 1141, 1150, and / or 1151.

[0263] And, for a given beam, if all four WB amplitude indicators (2 polarizations and 2 layers) indicate zero WB amplitude, then the PMI index i 1，2 is not used to report the corresponding beam. Optionally, L beams are reported regardless of the reported WB amplitude bitmap.

[0264] Table 28: RI and WB amplitude bitmap B report

[0265]

[0266]

[0267] In another embodiment, the (N 0，1 , N 0，2 ) is reported according to at least one of the following options. In one option, the first PMI components i 1，5，1 and i 1，5，2 , or i 1，3，3 and i 1，3，4 , or i 1，4，3 and i 1，4，4 are used to separately report N 0，1 and N 0，2 . In another option, the first PMI components i 1，3，1 and i 1，3，2 are used to jointly report N 0，1 and N 0，2 . It should be noted that in this case, i 1，3，1 and i 1，3，2 are reported in CSI part 1. i 1，3，1 =[i′ 1，3，1 , N 0，1 and i 1，3，2 =[i′ 1，3，2 , N 0，2 are defined separately earlier in this disclosure, where i′ 1，3，1 and i′ 1，3，2 correspond to i 1，3，1 and i 1，3，2 . In another option, the first PMI components i 1，41 and i 1，4，2 are used to jointly report N0，1 and N 0，2 . It should be noted that, in this case, i 1，4，1 and i 1，4，2 are reported in CSI part 1. i 1，4，1 =[i′ 1，4，1 , N 0，1 and i 1，4，2 =[i′ 1，4，2 , N 0，2 , where i′ 1，4，1 and i′ 1，4，2 correspond to i 1，4，1 and i 1，4，2 . In another option, the first PMI components i 1，3，1 , i 1，3，2 , i 1，41 and i 1，4，2 are used to jointly report N 0，1 and N 0，2 . It should be noted that, in this case, i 1，3，1 , i 1，3，2 , i 1，41 and i 1，4，2 are reported in CSI part 1.

[0268] In another embodiment, by replacing (N 0，1 , N 0，2 ) with the WB amplitude bitmap B or (B 0 , B 1 ), the bitmap B is reported according to at least one of the options in the previous embodiment.

[0269] For any of the above embodiments having at least two code fields or parts, when the UE is configured to report CSI for more than one (M>1) DL component carrier (CC) in the case of carrier aggregation (CA), each of the code fields can be formed as follows. For code field k, the CSI-UCI associated with the bit sequence of segment k for M DL CCs can be concatenated (CC 0 |CC 1 |...|CC M-1 ) to become one UCI code field k to be encoded using a channel coding block. For scheme 0 where only one code field is applicable, the CSI-USI associated with the bit sequence for M different DL CCs can be concatenated (CC 0 |CC 1 |...|CC M-1 ) to become one UCI codeword to be encoded using a channel coding block.

[0270] For any of the above embodiments, the channel coding block can include other bit-level functions such as CRC insertion, interleaving, and / or rate matching. The multiplexing block can include a channel interleaver or be located before the channel interleaver. Additionally, some additional error protection (e.g., error protection for RI) can be introduced by, for example, repetition or block coding before multiplexing or channel coding.

[0271] For any of the above embodiments, if some additional coding gain (or error protection) is needed for at least one CSI parameter, then additional coding (such as repetition, puncturing, or block coding) can be applied before multiplexing the CSI parameter with at least a second CSI parameter and / or jointly coding the foregoing CSI parameter with at least a second CSI parameter. For example, repetition, puncturing, or short block coding can be applied to RI before multiplexing and channel coding. By doing so, the BLER requirement for RI can be set to be lower than that of at least another CSI parameter. In Figure 9a Embodiment 900 or 901, repetition, puncturing, or short block coding can be applied to RI before multiplexing RI with CQI. In Figure 9b Embodiment 910 or 911, repetition, puncturing, or short block coding can be applied to RI before multiplexing RI with CQI and PMI part I. In Figure 11a Diagram 1100 or 1101, repetition, puncturing, or short block coding can be applied to RI before multiplexing RI with CQI-1 and PMI part I. In Figure 11b Diagram 1110 or 1111, repetition, puncturing, or short block coding can be applied to RI before multiplexing RI with CQI-1.

[0272] For any of the above embodiments, RI includes one report for each CSI reporting band. Similarly, CRI (which can accompany at least one CSI-RSRP) includes one report for each CSI reporting band. Depending on the UE configuration, CQI can include one report or N SB reports for each CSI reporting band, where N SB is the number of sub-bands within the configured CSI reporting band. Similarly, depending on the UE configuration, PMI can include one report or N SB reports for each CSI reporting band, where N SB is the number of sub-bands within the configured CSI reporting band.

[0273] For any of the above embodiments in which CSI includes multiple segments reported in one time slot, whenever RI is reported in the first segment, CRI can also be reported in the first segment, just like RI.

[0274] For any of the above embodiments, the CSI-UCI content of A-CSI can be sent within one subframe / slot or divided into multiple subframes / slots. If the CSI-UCI is sent together with UL-SCH data, the CSI-UCI can be regarded as "data-like", but encoded more strictly, such as via a configurable MCS similar to LTE or a beta offset. Here, "data-like" includes using the same RE mapping scheme and / or the same layer mapping scheme (i.e., mapping across layers, REs, and OFDM symbols) as data. However, the channel coding of the control information can be different from that of the data (e.g., LDPC is used for data while polar codes or tail-biting convolutional codes / TBCC are used for control).

[0275] Any of the above embodiments and sub-embodiments can be used independently or in combination with at least one other embodiment and sub-embodiment. If used in combination with at least one other embodiment / sub-embodiment, a certain set of usage conditions can be specified. For example, Scheme 0 can be used in combination with Scheme 2A or 2B. When reporting only one PMI for the entire CSI reporting bandwidth (CRB), i.e., "wideband" or "partial band" PMI reporting (for type I CSI, type II CSI, or both), Scheme 0 can be used. Scheme 2A or 2B can be used in other cases, i.e., when reporting sub-band PMI. In this case, one of the conditions requires the PMI frequency granularity.

[0276] For layer mapping, the same scheme applied to the examples of data symbols and control symbols can be described as follows.

[0277] When the UE is granted 1-layer transmission on the PUSCH, a modulated symbol stream {d(i)} (indexed by i) is formed by serially connecting all the modulated symbols. When more than one code block (CB) is associated with a codeword, the symbols associated with multiple CBs are concatenated. This symbol stream {d(i)} serves as the input to the layer mapping. For frequency-first mapping, the modulated symbol stream is first mapped across the frequency subcarriers (REs) within the set of allocated PRBs and then across the OFDM symbols within the scheduled time unit (slot or subframe). For illustration, a modulated symbol stream {d(i)} mapped to the "set of available REs" indexed by {(k, l)} is given (where k and l represent the frequency / subcarrier index and the time / OFDM symbol index, respectively). As the index i increases, the frequency-first mapping maps d(i) by first increasing the index k from 0 to k MAX -1 (for a fixed l), and then increasing the index l. That is, k = mod(i, k MAX ) and where k MAXis the number of resource elements (REs) of the frequency subcarriers in the allocated PRBs. The "set of available REs" is defined as the REs not occupied by UL RS or other UL signals / channels prioritized over UL-SCH data and CSI-UCI.

[0278] When the UE is granted L-layer transmission on the PUSCH (where L > 1), the modulation symbol stream {d(i)} (indexed by i) is mapped across L layers in addition to being mapped to the REs (frequency / subcarrier index and time / OFDM symbol index). The way of mapping {d(i)} depends on whether vertical spatial mapping, horizontal spatial mapping, or orthogonal spatial mapping is used, and whether the spatial mapping (across layers) is performed at the granularity of modulation symbols or CBs. However, for a given layer, the mapping across REs is performed in the same way as for 1-layer transmission. For example, if symbol-level vertical spatial mapping is used, first the symbol stream is mapped across L layers, then across the frequency subcarriers (REs) within the set of allocated PRBs, and then across the OFDM symbols within the scheduled time unit (slot or subframe). Let x (l) (i) and d(i) represent the number of symbols per layer, the number of symbols in a CW, the symbol stream for layer l, and the symbol stream for the CW, respectively. The CW-to-layer mapping can be described as follows. Here, CB segmentation and / or rate matching ensure is divisible by L.

[0279]

[0280]

[0281] If CB-level vertical spatial mapping is used, given all the modulated symbols from L CBs (associated with a single CW) connected serially to form the modulation symbol stream {d(i)} (indexed by i), the total number of modulation symbols is equal to BμL = k MAX l MAX L, where B is the number of modulation symbols per CB, and k MAX l MAX is the total number of REs in the entire set of allocated PRBs across all OFDM symbols within a scheduled time unit (slot or subframe). Therefore, all CBs have the same size and adopt the same MCS. That is, for different n values, {CBn, CBn+1,..., CBn+L-1} share the same CB size B. Here, the modulation symbol d(i) is mapped to the modulation symbol stream associated with layer l as follows:

[0282]

[0283] For all of the above layer mapping schemes, the starting point of the RE mapping ({(k, l)}, where k and l represent the frequency / subcarrier index and the time / OFDM symbol index, respectively) can depend on various factors, such as whether CSI-UCI symbols are multiplexed with data symbols, or whether there are some other signals (such as UL DMRS, UL SRS, HARQ-ACK symbols). Additionally, if two or more code fields are used for CSI-UCI, the starting points of the RE mapping associated with different code fields can be different.

[0284] The following embodiments relate to the multiplexing of CSI-UCI modulation symbols in the presence of UL-SCH data symbols.

[0285] When CSI-UCI is transmitted without UL-SCH data, it is considered "similar to data transmission" in the sense explained previously.

[0286] When CSI-UCI is transmitted together with UL-SCH data (i.e., a UL grant that includes requests for both data transmission and CSI transmission), after channel coding and modulation mapping, the modulation symbols associated with CSI-UCI (UL control symbols) are multiplexed with the modulation symbols associated with data (UL data symbols).

[0287] For a scheme with two segments (two parts), the gNB can first decode code field 1 (which includes RI) before the other segment(s). For example, when RI is included in segment 1, once segment 1 is successfully decoded, the payload size of segment 2 (the size of which is RI-dependent) is known based on the decoded RI value. To facilitate lower latency decoding (for both data and CSI-UCI), CSI-UCI segment 1 can be placed as early as possible in time within the UL subframe / slot that includes CSI-UCI (and thus frequency-first mapped in the first few available OFDM symbols). On the other hand, the modulation symbols associated with code field 2 can be multiplexed with data symbols in various ways. Some examples include distributed mapping and local mapping (in time and / or frequency).

[0288] Figure 12Several examples of multiplexing schemes in which CSI-UCI is transmitted together with UL-SCH data are shown. A two-layer transmission with 2-PRB (one PRB consists of 12 subcarriers and one time slot consists of 7 OFDM symbols) resource allocation is requested. For illustrative purposes, assume symbol-level vertical layer mapping. Assume that UL DMRS is located in the first OFDM symbol. In the first example multiplexing scheme 1200, segment 2 is mapped to the end of the time slot to allow the gNB to have some decoding time for segment 1 before segment 2 can be decoded. In the second example multiplexing scheme 1210, segment 2 is mapped to the next OFDM symbol for segment 1. Alternatively, segment 2 can be mapped immediately (continuously) after segment 1. In the third example multiplexing scheme 1220, segment 2 is mapped across time slots and PRBs in a distributed manner. Those skilled in the art can infer other mapping schemes (patterns) in a straightforward manner from the disclosed description and examples.

[0289] In Figure 12 the example shown, segment 1 is mapped on the second OFDM symbol across a set of adjacent (consecutive) subcarriers. While such a local mapping in the frequency domain allows for a compact location of segment 1, it may lack frequency diversity. In Figure 12 a variant of the example in, segment 1 is mapped across a set of allocated PRBs in a distributed manner. For example, the resulting symbols of segment 1 can be distributed more or less evenly across the set of all allocated PRBs. Figure 13 Several examples of segment 1 mapped in this way on one OFDM symbol (in this illustration, in the second OFDM symbol) are shown. Segment 2 is not shown in this illustration. A two-layer transmission with a 2-PRB (one PRB consists of 12 subcarriers and one time slot consists of 7 OFDM symbols) resource allocation is requested. For illustrative purposes, assume symbol-level vertical layer mapping. Assume that UL DMRS is located in the first OFDM symbol and segment 1 is located in the second OFDM symbol. In the example multiplexing scheme 1300, segment 1 occupies half of the allocated PRBs and is evenly distributed across 2 allocated PRBs. In the example multiplexing scheme 1310, segment 1 occupies two-thirds of the allocated PRBs and is evenly distributed across 2 allocated PRBs. The portion of the allocated PRBs for segment 1 can depend on the CSI-UCI payload and the MCS for the UCI (e.g., to meet the required BLER). Those skilled in the art can infer other mapping schemes (patterns) in a straightforward manner from the disclosed description and examples.

[0290] In the above example, Segment 1 is mapped only on one OFDM symbol and, in addition, on the earliest possible OFDM symbol (in this example, the second OFDM symbol since the first OFDM symbol is used for UL DMRS). When the payload of Segment 1 CSI-UCI is large enough to require more than one OFDM symbol, n > 1 of the earliest OFDM symbols can be used. If the first OFDM symbol in a time slot is used for UL DMRS, then the n OFDM symbols after the first symbol are used for Segment 1. When using n > 1 OFDM symbols, the local mapping and the distributed mapping of subcarriers within the allocated PRBs can be extended accordingly.

[0291] Each of the embodiments described for Component 4 (generally) applies to CSI reports with a suitably large payload, which relate to at least one CSI parameter - periodic, semi-persistent or aperiodic - with a payload size dependent on RI; wideband / partial band (one report for each configured CSI reporting band) or sub-band (one report for each sub-band within the configured CSI reporting band). The associated CSI-UCI can be sent via PUSCH by allocating a small number of PRBs or a fraction of the PRBs (a group of subcarriers within one PRB and / or a group of OFDM symbols within one time slot) in the PRBs allocated for UL-SCH data transmission (as indicated by the resource allocation field in the UL-related DCI). Alternatively, the associated CSI-UCI can be sent via PUSCH by mapping the associated CSI-UCI using the same number of PRBs and / or OFDM symbols as those allocated for UL-SCH data transmission (as indicated by the resource allocation field in the UL-related DCI) - the amount of time-frequency resources for CSI-UCI transmission depends on the payload size and the multiplexing scheme. As previously mentioned, this can be done regardless of whether the CSI-UCI is multiplexed with UL-SCH data.

[0292] Several variants of the above scheme can be as follows.

[0293] In a variant embodiment, both UL data and CSI-UCI are transmitted with the same number of layers (rank), where the number of layers is indicated in the associated UL-related DCI. The MCS for CSI-UCI transmission is determined by the MCS assigned for UL data transmission with a certain offset (similar to the LTE beta offset). This offset can be fixed in the specification or can be configured via higher layer signaling, MAC CE, or L1 DL control signaling. When signaling this offset via L1 control signaling, this offset can be included in the same UL-related DCI that schedules the UL data transmission. When this offset is fixed in the specification or configured via higher layer signaling or MAC CE, the value of the offset can be rank-dependent or rank-independent. For example, for higher rank values, the offset can be larger or smaller. Additionally, a minimum (lower bound) MCS for CSI-UCI can be defined to ensure that the MCS for CSI-UCI transmission is not lower than a certain value. Alternatively, instead of the minimum (lower bound) MCS, repetition coding can be used when necessary to reduce the MCS for CSI-UCI.

[0294] In another variant embodiment, CSI-UCI can be transmitted with a different number of layers (rank) than UL data. For example, the number of layers for CSI-UCI transmission is less than or equal to the number of layers for UL data. In this case, both the number of layers and the MCS for CSI-UCI transmission are determined by the number of layers and the MCS for UL data transmission as indicated in the associated UL-related DCI and at least one offset value (similar to the LTE beta offset). Here, the number of layers and the MCS for CSI-UCI transmission can be determined jointly or separately. An example process is as follows. For a given offset value, first determine the MCS for CSI-UCI transmission from the MCS for UL data transmission. If the lowest MCS is still not low enough for the offset (e.g., not low enough to ensure achieving the required BLER target for CSI-UCI reception), then the rank for CSI-UCI transmission can be reduced. Then repeat the process of determining the MCS for the lower rank value. Thus, based on the MCS and rank for UL data transmission and the offset, the MCS and rank for CSI-UCI transmission are jointly determined.

[0295] In another variant embodiment, CSI-UCI can be transmitted with a rank > 1 only when the total payload for CSI-UCI is greater than X, where X can be fixed in the specification or configured via higher layer signaling. When CSI-UCI is transmitted together with data, a condition that can also be used (either in combination with another condition or separately) is when the data is transmitted with a rank > 1. Otherwise, CSI-UCI is transmitted with a rank of 1. Alternatively, this payload-dependent criterion can be linked (or implicitly used) with the channel coding scheme. That is, CSI-UCI can be transmitted with a rank > 1 only when channel coding scheme A (such as LDPC) is used.

[0296] In another variant embodiment, when CSI-UCI is transmitted with a rank of 1 (one layer), several alternatives can be applied. In the first alternative, CSI-UCI symbols can be repeated across all layers used for UL data transmission (after modulation mapping). In the second alternative, CSI-UCI symbols can be transmitted across all layers using a specification-transparent transmit diversity scheme (after modulation mapping). In the third alternative, CSI-UCI symbols can be transmitted across all layers using an RE-level or PRB-level precoder cycle (after modulation mapping). In the fourth alternative, CSI-UCI symbols can be transmitted across all layers using an assigned rank-1 precoder (signaled to the UE via UL-related UCI, the UL-related UCI including an associated UL grant and a CSI request). In the fifth alternative, CSI-UCI symbols can be transmitted across all layers using a rank-1 precoder determined by the UE (after modulation mapping).

[0297] Any of the above embodiments related to aperiodic CSI (A-CSI) - such as multi-segment UCI / CSI - can also be used for semi-persistent CSI (SP-CSI).

[0298] The above variant embodiments can be used independently or in combination with at least one other variant embodiment.

[0299] Figure 14 A flowchart of an example method 1400 according to an embodiment of the present disclosure is shown, in which a UE receives CSI configuration information and reports multi-segment CSI. For example, method 1400 can be executed by UE 116.

[0300] Method 1400 begins with the UE receiving and decoding CSI configuration information (step 1401). Then, the UE calculates CSI according to the configuration information (step 1402) and transmits the CSI on an uplink (UL) channel (step 1403).

[0301] In this method, the CSI includes N > 1 segments and is transmitted in one time slot, and the first segment includes at least a rank indicator (RI) and at least one other CSI parameter. For example, N can be two, where the first segment further includes a channel quality indicator (CQI) for a first codeword (CW). In another example, in addition to the CQI for the first CW, the first segment includes two indicators, which respectively correspond to the number of reported broadband amplitude coefficients for the first layer and the second layer. This is common in type II CSI supported in NR. For both of these examples, the second segment includes CSI parameters associated with a precoding matrix indicator (PMI). If the UE is configured to receive up to 8 layers, when the reported RI in the first segment is greater than 4, the second segment further includes a CQI for a second CW. For all of these examples, the first segment further includes a CSI reference signal resource indicator (CRI).

[0302] Figure 15 FIG. 1500 is a flow chart of an example method 1500 in accordance with an embodiment of the present disclosure, in which a BS transmits CSI configuration information and receives a multi-segment CSI report for a UE (labeled UE-k). For example, method 1500 can be performed by BS 102.

[0303] Method 1500 begins with the BS generating CSI configuration information for a UE (referred to as UE-k) (step 1501), and then transmitting the CSI configuration information to UE-k (step 1502). Then, the BS receives a CSI report from UE-k (step 1503).

[0304] In this method, the CSI includes N > 1 segments and is transmitted in one time slot, and the first segment includes at least a rank indicator (RI) and at least one other CSI parameter. For example, N can be two, where the first segment further includes a channel quality indicator (CQI) for a first codeword (CW). In another example, in addition to the CQI for the first CW, the first segment includes two indicators, which respectively correspond to the number of reported broadband amplitude coefficients for the first layer and the second layer. This is common in type II CSI supported in NR. For both of these examples, the second segment includes CSI parameters associated with a precoding matrix indicator (PMI). If the UE is configured to receive up to 8 layers, when the reported RI in the first segment is greater than 4, the second segment further includes a CQI for a second CW. For all of these examples, the first segment further includes a CSI reference signal resource indicator (CRI).

[0305] Although Figure 14 and Figure 15 respectively illustrate examples of methods for receiving configuration information and configuring a UE, it is possible to Figure 14 and Figure 15Make various changes. For example, although the various steps in each figure are shown as a series of steps, the various steps in each figure can overlap, occur in parallel, occur in a different order, occur multiple times, or not be performed in one or more embodiments.

[0306] Although the present disclosure has been described using example embodiments, those skilled in the art can envision various changes and modifications. The present disclosure is intended to cover changes and modifications that fall within the scope of the appended claims.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprises: receiving, from a base station, channel state information (CSI) report configuration information, the CSI report configuration information including first information indicating at least one CSI parameter configured with wideband reporting and sub-band reporting, and second information indicating a set of sub-bands for which CSI is to be reported, wherein, in the case where wideband reporting is configured, the at least one CSI parameter is reported for the entire set of sub-bands, and in the case where sub-band reporting is configured, the at least one CSI parameter is reported for each sub-band in the set of sub-bands; identifying, based on the first information and the second information, a first CSI part and a second CSI part for the set of sub-bands; and sending, to the base station, a CSI report including the first CSI part and the second CSI part, wherein the first CSI part includes channel quality information (CQI) and information on the number of non-zero amplitude coefficients of a layer, wherein the second CSI part includes a precoding matrix indicator (PMI), wherein the payload size of the second CSI part is associated with the first CSI part, and wherein the first CSI part and the second CSI part are separately encoded.

2. The method according to claim 1, wherein the information on the number of non-zero amplitude coefficients of a layer indicates the number of non-zero wideband amplitude coefficients of each layer.

3. The method according to claim 1, wherein the first CSI part further includes a rank indicator (RI), and wherein the information on the number of non-zero amplitude coefficients of a layer indicates the total number of non-zero amplitude coefficients of all layers.

4. The method according to claim 1, wherein the PMI includes at least one of a wideband PMI and a sub-band PMI.

5. The method according to claim 1, further comprises: receiving, from the base station, uplink-related downlink control information (DCI) scheduling an uplink transmission, wherein the CSI report is multiplexed with uplink shared channel (UL-SCH) data and is sent to the base station on a physical uplink shared channel (PUSCH) based on resource allocation information included in the uplink-related DCI.

6. A method performed by a base station in a wireless communication system, the method comprises: sending, to a terminal, channel state information (CSI) report configuration information, the CSI report configuration information including first information indicating at least one CSI parameter configured with wideband reporting and sub-band reporting, and second information indicating a set of sub-bands for which CSI is to be reported, wherein, in the case where wideband reporting is configured, the at least one CSI parameter is reported for the entire set of sub-bands, and in the case where sub-band reporting is configured, the at least one CSI parameter is reported for each sub-band in the set of sub-bands; receiving, from the terminal, a CSI report for the set of sub-bands, wherein the CSI report includes a first CSI part and a separate second CSI part, decoding the first CSI part including channel quality information (CQI) and information on the number of non-zero amplitude coefficients of a layer; and Decode a second CSI part including a precoding matrix indicator (PMI), and based on the decoded first CSI part, the second CSI part is decoded separately from the first CSI part, wherein the payload size of the second CSI part depends on the decoded first CSI part.

7. The method according to claim 6, wherein, information regarding the number of non-zero amplitude coefficients per layer indicates the number of non-zero wideband amplitude coefficients per layer.

8. The method according to claim 6, wherein, the first CSI part further includes a rank indicator (RI), and wherein information regarding the number of non-zero amplitude coefficients per layer indicates the total number of non-zero amplitude coefficients for all layers.

9. The method according to claim 6, wherein, the PMI includes at least one of a wideband PMI and a subband PMI.

10. The method according to claim 6, further comprises: sending to the terminal uplink-related downlink control information (DCI) for scheduling uplink transmissions, wherein the CSI report is multiplexed with uplink shared channel (UL-SCH) data and is received from the terminal on a physical uplink shared channel (PUSCH) according to resource allocation information included in the uplink-related DCI.

11. A terminal in a wireless communication system, the terminal comprises: a transceiver configured to transmit or receive signals; and a controller coupled to the transceiver and configured to: receive from a base station channel state information (CSI) report configuration information, the CSI report configuration information including first information indicating at least one CSI parameter configured with a wideband report and a subband report, and second information indicating a set of subbands for which CSI is to be reported, wherein in the case where the wideband report is configured, the at least one CSI parameter is reported for the entire set of subbands, and in the case where the subband report is configured, the at least one CSI parameter is reported for each subband in the set of subbands; identify a first CSI part and a second CSI part for the set of subbands based on the first information and the second information; and send to the base station a CSI report including the first CSI part and the second CSI part, wherein the first CSI part includes channel quality information (CQI) and information regarding the number of non-zero amplitude coefficients per layer, wherein the second CSI part includes a precoding matrix indicator (PMI), wherein the payload size of the second CSI part is associated with the first CSI part, and wherein the first CSI part and the second CSI part are encoded separately.

12. The terminal according to claim 11, wherein, information regarding the number of non-zero amplitude coefficients per layer indicates the number of non-zero wideband amplitude coefficients per layer.

13. The terminal according to claim 11, wherein, the first CSI part further includes a rank indicator (RI), and wherein information regarding the number of non-zero amplitude coefficients per layer indicates the total number of non-zero amplitude coefficients for all layers.

14. The terminal according to claim 11, wherein, the PMI includes at least one of a wideband PMI and a subband PMI.

15. The terminal according to claim 11, wherein, The controller is further configured to receive, from a base station, uplink-related downlink control information DCI that schedules an uplink transmission, and wherein, the CSI report is multiplexed with uplink shared channel UL-SCH data and is transmitted to the base station on a physical uplink shared channel PUSCH based on resource allocation information included in the uplink-related DCI.

16. A base station in a wireless communication system, the base station comprising: a transceiver configured to transmit or receive signals; and a controller coupled to the transceiver and configured to: send, to a terminal, channel state information CSI report configuration information, the CSI report configuration information including first information indicating at least one CSI parameter configured with wideband reporting and subband reporting, and second information indicating a set of subbands for which CSI is to be reported, wherein when wideband reporting is configured, the at least one CSI parameter is reported for the entire set of subbands, and when subband reporting is configured, the at least one CSI parameter is reported for each subband in the set of subbands; receive, from the terminal, a CSI report for the set of subbands, wherein the CSI report includes a first CSI part and a separate second CSI part, decode the first CSI part including channel quality information CQI and information on the number of non-zero amplitude coefficients of a layer; and decode the second CSI part including a precoding matrix indicator PMI, the second CSI part being decoded separately from the first CSI part based on the decoded first CSI part, wherein the payload size of the second CSI part depends on the decoded first CSI part.

17. The base station according to claim 16, wherein, the information on the number of non-zero amplitude coefficients of a layer indicates the number of non-zero wideband amplitude coefficients of each layer.

18. The base station according to claim 16, wherein, the first CSI part further includes a rank indicator RI, and wherein the information on the number of non-zero amplitude coefficients of a layer indicates the total number of non-zero amplitude coefficients of all layers.

19. The base station according to claim 16, wherein, the PMI includes at least one of a wideband PMI and a subband PMI.

20. The base station according to claim 16, wherein, the controller is further configured to send, to the terminal, uplink-related downlink control information DCI that schedules an uplink transmission, and wherein, the CSI report is multiplexed with uplink shared channel UL-SCH data and is received from the terminal on a physical uplink shared channel PUSCH according to resource allocation information included in the uplink-related DCI.

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