CSI reporting with CQI values

Abstract

Aspects of the present disclosure relate to reporting channel state information (CSI) feedback with a channel quality indicator (CQI) value. The UE (700) may be configured to receive a CSI reporting setting, and receive (1010) a set of channel measurement reference signals comprising at least one non-zero power (NZP) CSI reference signal (CSI-RS) resource. A UE (700) may be configured to generate (1015) a CSI feedback report according to a CSI report setting, and to transmit (1020) the CSI feedback report over a physical uplink channel, the CSI feedback report comprising a plurality of CSI report segments and a plurality of CQI values associated with the plurality of CSI report segments.

Description

Technical Field

[0001] The present disclosure relates to wireless communications and, more particularly, to reporting channel state information (CSI) feedback with channel quality indicator (CQI) values. Background Art

[0002] A wireless communication system may include one or more network communication devices, such as a base station, which may be further referred to as an evolved NodeB (eNB), a next generation NodeB (gNB), or other suitable terms. Each network communication device (such as a base station) may support wireless communication for one or more user communication devices (which may be further referred to as user equipment (UE) or other suitable terms). A wireless communication system may support wireless communication with one or more user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers). Additionally, a wireless communication system may support wireless communication across various radio access technologies, including third generation (3G) radio access technology (RAT), fourth generation (4G) RAT, fifth generation (5G) RAT, and other suitable RATs above 5G (e.g., sixth generation (6G)).

[0003] In some wireless communication networks, CSI feedback is reported by the UE to the network, where the CSI feedback may take various forms based on CSI feedback report size, time and frequency granularity, or other CSI reporting settings. Summary of the invention

[0004] The article "one" before an element is not limited and is understood to refer to "at least one" of these elements or "one or more" of these elements. The terms "one", "at least one", "one or more" and "at least one of one or more" are interchangeable. As used herein (including in the claims), "or" is used in a list of items (for example, a list of items beginning with phrases such as "at least one" or "one or more" or "one or two") to indicate an inclusive list, so that, for example, a list of at least one of A, B or C means A or B or C or AB or AC or BC or ABC (i.e. A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a set of closed conditions. For example, the example steps described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part". In addition, as used herein (including in the claims), a "set" can include one or more elements.

[0005] Some implementations of the methods and apparatus described herein may include: a UE receiving a CSI report setting, and receiving a set of channel measurement reference signals including at least one non-zero power (NZP) CSI reference signal (CSI-RS) resource. The methods and apparatus described herein may also include: the UE generating a CSI feedback report including multiple CSI reporting segments according to the CSI report setting, and sending the CSI feedback report including multiple CQI values ​​associated with the multiple CSI reporting segments through a physical uplink channel.

[0006] Some implementations of the methods and apparatus described herein may also include: a network node (e.g., a base station and / or a radio access network (RAN) entity) sending a CSI report setting, and sending a set of channel measurement reference signals including at least one NZP CSI-RS resource. The methods and apparatus described herein may also include: the network node receiving a CSI feedback report according to the CSI report setting through a physical uplink channel, the CSI feedback report including multiple CQI values ​​associated with multiple CSI report segments, wherein each CSI report segment is associated with at least one CQI value. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 An example of a wireless communication system according to aspects of the present disclosure is illustrated.

[0008] Figure 2 An example of a 3rd Generation Partnership Project (3GPP) New Radio (NR) protocol stack is illustrated, showing different protocol layers in a UE and a network, according to aspects of the present disclosure.

[0009] Figure 3 An example of defining aperiodic triggering states for a CSI report setting list according to aspects of the present disclosure is illustrated.

[0010] Figure 4A An example of an Abstract Syntax Notation One (ASN.1) structure indicating an aperiodic triggering state of a resource set and quasi-co-located (QCL) information according to aspects of the present disclosure is illustrated.

[0011] Figure 4B The present disclosure is illustrated in accordance with aspects of Figure 4A An example of an ASN.1 structure of a CSI resource configuration associated with an aperiodic trigger state.

[0012] Figure 5A An example of an ASN.1 structure for radio resource control (RRC) configuration of NZP CSI-RS resources according to aspects of the present disclosure is illustrated.

[0013] Figure 5BAn example of an ASN.1 structure for RRC configuration of CSI for interference measurement (CSI-IM) resources according to aspects of the present disclosure is illustrated.

[0014] Fig. 6A An example of CSI report generation according to aspects of the present disclosure is illustrated.

[0015] Figure 6B An example of partial CSI omission and reordering for Physical Uplink Shared Channel (PUSCH) based CSI according to aspects of the present disclosure is illustrated.

[0016] Figure 7 An example of a user equipment (UE) 700 according to aspects of the present disclosure is illustrated;

[0017] Figure 8 An example of a processor 800 according to aspects of the present disclosure is illustrated.

[0018] Fig. 9 An example of a network device (NE) 900 according to aspects of the present disclosure is illustrated.

[0019] Fig.10 A flow chart of a method performed by a UE according to aspects of the present disclosure is illustrated.

[0020] Fig.11 A flow chart of a method performed by a NE according to aspects of the present disclosure is illustrated. DETAILED DESCRIPTION

[0021] In general, the present disclosure describes systems, methods, and apparatus for reporting CSI feedback with CQI values. In some embodiments, the method may be performed using computer executable code embedded on a computer readable medium. In some embodiments, an apparatus or system may include a computer readable medium containing computer readable code, which, when executed by a processor, causes the apparatus or system to perform at least a portion of the solution described below.

[0022] In a wireless communication network, CSI feedback is reported by a UE to the network, where the CSI feedback may take various forms based on CSI feedback report size, time and frequency granularity or other CSI reporting settings.

[0023] For CSI reporting in 3GPP NR Release 16 specifications (Rel-16), two types of codebooks are defined. The NR Type-I codebook uses multiple predefined matrices, from which selection is made by the user equipment (UE) report and / or RRC configuration. In contrast, the NR Type-II codebook is not based on a predefined table, but on a specially designed mathematical formula with multiple parameters. The parameters in the formula are determined by the RRC configuration and / or UE report. The NR Type-II codebook is based on more detailed CSI reporting and supports multi-user multiple input multiple output (MU-MIMO) communication.

[0024] In NR Rel-16, high-resolution CSI feedback reporting (i.e., Type-II) is specified, where the frequency granularity of the CSI feedback can be indirectly parameterized. For 3GPP NR Rel-16 Type-II codebooks with high resolution, the number of precoder matrix indicator (PMI) bits fed back from the UE in the next generation Node B (gNB) via uplink control information (UCI) may be very large (>1000 bits at large bandwidths), even for single-point transmission. The purpose of multi-panel transmission is to improve spectral efficiency, as well as the reliability and robustness of connections in different scenarios, and it covers both ideal and non-ideal backhaul. In order to improve the reliability of using multi-panel transmission, ultra-reliable low-latency communication (URLLC) under multi-panel transmission has been negotiated, where the UE can be served by multiple transmit-receive points (TRPs) forming a coordinated cluster, which may be connected to a central processing unit.

[0025] In addition, CSI feedback enhancement corresponding to scenarios with relatively high UE speeds is being studied. While one proposal is to report multiple CSI reports, each report including a rank indicator (RI) and / or PMI and / or CQI with lower periodicity, i.e., more frequent reporting, to address faster channel variations at high speeds, the disadvantage of this proposal is that the CSI feedback overhead is larger and the complexity of reporting / calculating multiple CSI reports at the UE is higher. While another proposal is to report a single CQI value corresponding to a time interval equivalent to the traditional CSI report periodicity value, the disadvantage of this proposal is that a single CQI value may not capture the channel variations within a single CSI report periodicity value.

[0026] In order to adapt to this high-speed scenario while maintaining similar service quality, a modified CSI framework is needed, including measurement and reporting. At high speeds, the channel coherence time is expected to be lower than the traditional CSI reporting periodicity value, and therefore the channel quality may vary within a CSI reporting interval. Therefore, it may be necessary to enhance the CQI format. CQI enhancement is proposed for the CSI framework at high speeds. The proposed solution includes the following items:

[0027] According to a first solution, multiple CQI values ​​are fed back within a CSI report, where a reference CQI value is reported with high resolution (eg, subband (SB) format) and subsequent CQI values ​​are reported with lower resolution (eg, wideband (WB) format).

[0028] According to a second solution, the UE reports multiple CQI values ​​with a lower periodicity value (ie, more frequent reporting) compared to the PMI / RI reporting periodicity.

[0029] According to a third solution, only two CQI values ​​are fed back in the CSI report, and a configured (and / or reported and / or indicated) extrapolation method is utilized to infer the channel quality in intervals other than the two reference intervals corresponding to the two CQI values.

[0030] Aspects of the disclosure are described in the context of a wireless communication system.

[0031] Figure 1 An example of a wireless communication system 100 according to aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more NEs 102, one or more UEs 104, and a core network (CN) 106. The wireless communication system 100 may support various radio access technologies. In some implementations, the wireless communication system 100 may be a 4G network, such as a long term evolution (LTE) network or an advanced LTE (LTE-A) network. In some other implementations, the wireless communication system 100 may be an NR network, such as a 5G network, an advanced 5G (5G-A) network, or a 5G ultra-wideband (5G-UWB) network. In other implementations, the wireless communication system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technologies, including the Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20. The wireless communication system 100 may support radio access technologies above 5G, such as 6G. Additionally, the wireless communication system 100 may support technologies such as time division multiple access (TDMA), frequency division multiple access (FDMA), or code division multiple access (CDMA).

[0032] One or more NEs 102 may be dispersed throughout a geographic area to form a wireless communication system 100. One or more NEs 102 described herein may be or include or may be referred to as network nodes, base stations, network elements, network functions, network entities, radio access networks (RAN), NodeBs, eNodeBs (eNBs), next generation NodeBs (gNBs), or other suitable terms. NE 102 and UE 104 may communicate via a communication link, which may be a wireless or wired connection. For example, NE 102 and UE 104 may perform wireless communication (e.g., receive signaling, send signaling) via a Uu interface.

[0033] NE 102 can provide a geographic coverage area within which NE 102 can support services for one or more UEs 104. For example, NE 102 and UE 104 can support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc.) according to one or more radio access technologies. In some implementations, NE 102 can be mobile, for example, a satellite associated with a non-terrestrial network (NTN). In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies can overlap, but different geographic coverage areas can be associated with different NE 102.

[0034] One or more UEs 104 may be dispersed throughout the geographic area of ​​the wireless communication system 100. UE 104 may include or may be referred to as a remote unit, a mobile device, a wireless device, a remote device, a subscriber device, a transmitter device, a receiver device, or some other suitable terminology. In some implementations, UE 104 may be referred to as a unit, a station, a terminal, or a client, etc. Additionally or alternatively, UE 104 may be referred to as an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a Machine Type Communication (MTC) device, etc.

[0035] The UE 104 may be capable of directly supporting wireless communications with other UEs 104 via a communication link. For example, the UE 104 may support wireless communications directly with another UE 104 via a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, the UE 104 may support wireless communications directly with another UE 104 via a PC5 interface.

[0036] NE 102 can support communication with CN 106, or communication with another NE 102, or both. For example, NE 102 can interface with other NE 102 or CN 106 through one or more backhaul links (e.g., S1, N2, N2 or network interface). In some implementations, NE 102 can communicate directly with each other. In some other implementations, NE 102 can communicate with each other or communicate indirectly (e.g., via CN 106). In some implementations, one or more NE 102 may include subcomponents, such as access network entities, which can be examples of access node controllers (ANCs). ANC can communicate with one or more UE 104 through one or more other access network transmission entities, which can be referred to as radio heads, smart radio heads, or transmission-reception points (TRPs).

[0037] The CN 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The CN 106 may be an evolved packet core (EPC) or a 5G core (5GC), which may include control plane entities that manage access and mobility (e.g., mobility management entity (MME), access and mobility management function (AMF)), and user plane entities that route packets or interconnect with external networks (e.g., serving gateway (S-GW), packet data network (PDN) gateway (P-GW), or user plane function (UPF)). In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearer, signal bearer, etc.) for one or more UEs 104 served by one or more NEs 102 associated with the CN 106.

[0038] The CN 106 may communicate with a packet data network via one or more backhaul links (e.g., via S1, N2, N2 or another network interface). The packet data network may include an application server. In some implementations, one or more UEs 104 may communicate with the application server. The UE 104 may establish a session (e.g., a protocol data unit (PDU) session, etc.) with the CN 106 via the NE 102. The CN 106 may use the established session (e.g., an established PDU session) to route traffic (e.g., control information, data, etc.) between the UE 104 and the application server. A PDU session may be an example of a logical connection between a UE 104 and a CN 106 (e.g., one or more network functions of the CN 106).

[0039] In the wireless communication system 100, the NE 102 and the UE 104 may use the resources of the wireless communication system 100 (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers)) to perform various operations (e.g., wireless communication). In some implementations, the NE 102 and the UE 104 may support different resource structures. For example, the NE 102 and the UE 104 may support different frame structures. In some implementations, such as in 4G, the NE 102 and the UE 104 may support a single frame structure. In some other implementations, such as in 5G and other suitable radio access technologies, the NE 102 and the UE 104 may support various frame structures (i.e., multiple frame structures). The NE 102 and the UE 104 may support various frame structures based on one or more digital technologies.

[0040] One or more digital technologies may be supported in the wireless communication system 100, and the digital technologies may include subcarrier spacing and cyclic prefixes. A first digital technology (e.g., μ = 0) may be associated with a first subcarrier spacing (e.g., 15kHz) and a conventional cyclic prefix. In some implementations, a first digital technology (e.g., μ = 0) associated with a first subcarrier spacing (e.g., 15kHz) may utilize one slot per subframe. A second digital technology (e.g., μ = 1) may be associated with a second subcarrier spacing (e.g., 30kHz) and a conventional cyclic prefix. A third digital technology (e.g., μ = 2) may be associated with a third subcarrier spacing (e.g., 60kHz) and a conventional cyclic prefix or an extended cyclic prefix. A fourth digital technology (e.g., μ = 3) may be associated with a fourth subcarrier spacing (e.g., 120kHz) and a conventional cyclic prefix. A fifth digital technology (e.g., μ = 4) may be associated with a fifth subcarrier spacing (e.g., 240kHz) and a conventional cyclic prefix.

[0041] The time intervals of resources (e.g., communication resources) can be organized according to frames (also referred to as radio frames). Each frame can have a duration, for example, a duration of 10 milliseconds (ms). In some implementations, each frame can include multiple subframes. For example, each frame can include 10 subframes, and each subframe can have a duration, for example, a duration of 1 ms. In some implementations, each frame can have the same duration. In some implementations, each subframe of a frame can have the same duration.

[0042] Additionally or alternatively, the time intervals of resources (e.g., communication resources) can be organized according to time slots. For example, a subframe may include a certain number (e.g., quantity) of time slots. The number of time slots in each subframe may also depend on one or more digital technologies supported in the wireless communication system 100. For example, the first, second, third, fourth, and fifth digital technologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with the corresponding subcarrier spacings of 15kHz, 30kHz, 60kHz, 120kHz, and 240kHz may utilize a single time slot per subframe, two time slots per subframe, four time slots per subframe, eight time slots per subframe, and 16 time slots per subframe, respectively. Each time slot may include a certain number (e.g., quantity) of symbols (e.g., orthogonal frequency division multiplexing symbols). In some implementations, the number of time slots (e.g., quantity) for a subframe may depend on the digital technology. For a conventional cyclic prefix, a time slot may include 14 symbols. For an extended cyclic prefix (e.g., for a 60 kHz subcarrier spacing), a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on the digital technology. It should be understood that references to a first digital technology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.

[0043] In the wireless communication system 100, the electromagnetic (EM) spectrum can be divided into various categories, frequency bands, frequency channels, etc. based on frequency or wavelength. For example, the wireless communication system 100 can support one or more operating frequency bands, such as frequency range representations FR1 (410 MHz to 7.125 GHz), FR2 (24.25 GHz to 52.6 GHz), FR3 (7.125 GHz to 24.25 GHz), FR4 (52.6 GHz to 114.25 GHz), FR4a or FR4-1 (52.6 GHz to 71 GHz), and FR5 (114.25 GHz to 300 GHz). In some implementations, the NE 102 and the UE 104 can perform wireless communications on one or more of the operating frequency bands. In some implementations, FR1 can be used by the NE 102 and the UE 104 and other devices or apparatuses for cellular communication services (e.g., control information, data). In some implementations, FR2 may be used by the NE 102 and UE 104 and other devices or apparatuses for short-range, high data rate capabilities.

[0044] FR1 may be associated with one or more digital technologies (e.g., at least three digital technologies). For example, FR1 may be associated with a first digital technology (e.g., μ=0) including a 15kHz subcarrier spacing, a second digital technology (e.g., μ=1) including a 30kHz subcarrier spacing, and a third digital technology (e.g., μ=2) including a 60kHz subcarrier spacing. FR2 may be associated with one or more digital technologies (e.g., at least 2 digital technologies). For example, FR2 may be associated with a third digital technology (e.g., μ=2) including a 60kHz subcarrier spacing, and a fourth digital technology (e.g., μ=3) including a 120kHz subcarrier spacing.

[0045] Figure 2 An example of an NR protocol stack 200 according to aspects of the present disclosure is illustrated. Figure 2 UE 206, RAN node 208, and 5G core network (5GC) 210 (e.g., including at least one AMF) are shown, but they represent a collection of UEs 104 interacting with NE 102 (e.g., base station) and CN 106. As depicted, NR protocol stack 200 includes user plane protocol stack 202 and control plane protocol stack 204. User plane protocol stack 202 includes: physical (PHY) layer 212, media access control (MAC) sublayer 214, radio link control (RLC) sublayer 216, packet data convergence protocol (PDCP) sublayer 218, and service data adaptation protocol (SDAP) layer 220. Control plane protocol stack 204 includes: PHY layer 212, MAC sublayer 214, RLC sublayer 216, and PDCP sublayer 218. Control plane protocol stack 204 also includes radio resource control (RRC) layer 222 and non-access stratum (NAS) layer 224.

[0046] The AS layer 226 (also referred to as the "AS protocol stack") for the user plane protocol stack 202 is composed of at least SDAP, PDCP, RLC and MAC sublayers and a physical layer. The AS layer 228 for the control plane protocol stack 204 is composed of at least RRC, PDCP, RLC and MAC sublayers and a physical layer. Layer 1 (L1) includes the PHY layer 212. Layer 2 (L2) is split into the SDAP layer 220, the PDCP sublayer 218, the RLC sublayer 216 and the MAC sublayer 214. Layer 3 (L3) includes the RRC layer 222 and the NAS layer 224 for the control plane, and includes, for example, an Internet Protocol (IP) layer and / or a PDU layer (not depicted) for the user plane. L1 and L2 are referred to as "lower layers", while L3 and above (e.g., transport layer, application layer) are referred to as "high layers" or "upper layers".

[0047] The PHY layer 212 provides a transport channel to the MAC sublayer 214. The PHY layer 212 may use an energy detection threshold to perform a beam failure detection process, as described herein. In some embodiments, the PHY layer 212 may send an indication of a beam failure to a MAC entity at the MAC sublayer 214. The MAC sublayer 214 provides a logical channel to the RLC sublayer 216. The RLC sublayer 216 provides an RLC channel to the PDCP sublayer 218. The PDCP sublayer 218 provides a radio bearer to the SDAP sublayer 220 and / or the RRC layer 222. The SDAP sublayer 220 provides QoS flows to the core network (e.g., 5GC). The RRC layer 222 provides carrier aggregation and / or dual connectivity addition, modification, and release. The RRC layer 222 also manages the establishment, configuration, maintenance, and release of signaling radio bearers (SRBs) and data radio bearers (DRBs).

[0048] The NAS layer 224 is located between the UE 206 and the AMF in the 5GC 210. NAS messages are passed transparently through the RAN. The NAS layer 224 is used to manage the establishment of communication sessions and is used to maintain continuous communication with the UE 206 when the UE 206 moves between different cells in the RAN. In contrast, the AS layers 226 and 228 are located between the UE 206 and the RAN (i.e., the RAN node 208) and carry information through the wireless part of the network. Although Figure 2 Not depicted in , but an IP layer exists above the NAS layer 224, a transport layer exists above the IP layer, and an application layer exists above the transport layer.

[0049] The MAC sublayer 214 is the lowest sublayer in the L2 architecture of the NR protocol stack. The connection between the MAC sublayer 214 and the PHY layer 212 below is through a transport channel, and the connection with the RLC sublayer 216 above is through a logical channel. Therefore, the MAC sublayer 214 performs multiplexing and demultiplexing between logical channels and transport channels: the MAC sublayer 214 in the transmitting side constructs a MAC PDU (also called a transport block (TB)) from a MAC service data unit (SDU) received through a logical channel, and the MAC sublayer 214 in the receiving side restores a MAC SDU from a MAC PDU received through a transport channel.

[0050] The MAC sublayer 214 provides a data transfer service for the RLC sublayer 216 through a logical channel, which is a control logical channel carrying control data (e.g., RRC signaling) or a service logical channel carrying user plane data. On the other hand, data from the MAC sublayer 214 is exchanged with the PHY layer 212 through a transport channel, which is classified as an uplink (UL) or a downlink (DL). Data is multiplexed into a transport channel according to how it is sent in the air.

[0051] The PHY layer 212 is responsible for the actual transmission of data and control information via the air interface. That is, the PHY layer 212 carries all the information from the MAC transport channel via the air interface on the transmission side. Some of the important functions performed by the PHY layer 212 include: encoding and modulation, link adaptation (e.g., adaptive modulation and coding (AMC)), power control, cell search and random access (for initial synchronization and handover purposes), and other measurements for the RRC layer 222 (inside the 3GPP system (i.e., NR and / or LTE system) and between systems). The PHY layer 212 performs transmission based on transmission parameters such as modulation scheme, coding rate (i.e., modulation and coding scheme (MCS)), number of physical resource blocks (PRBs), etc.

[0052] Note that the LTE protocol stack includes a structure similar to the NR protocol stack 200, except that the LTE protocol stack lacks the SDAP sublayer 220 in the AS layer 226, the EPC replaces the 5GC 510, and the NAS layer 224 is located between the UE 206 and the MME in the EPC. It should also be noted that this disclosure distinguishes between protocol layers (such as the aforementioned PHY layer 212, MAC sublayer 214, RLC sublayer 216, PDCP sublayer 218, SDAP layer 240, RRC layer 222, and NAS layer 224) and the transmission layer (also referred to as the "MIMO layer" or "data stream") in multiple-input multiple-output (MIMO) communication.

[0053] Regarding the 3GPP NR Release 15 (Rel-15) Type-II codebook, it is assumed that the gNB is equipped with a two-dimensional (2D) antenna array that has N1 and N2 antenna ports placed in horizontal and vertical polarizations, and the communication occurs on N3 PMI subbands. A PMI subband consists of a set of resource blocks, and each resource block consists of a set of subcarriers. In this case, 2N1N2 CSI-RS ports are utilized to achieve high-resolution DL channel estimation for the NR Rel-15 Type-II codebook. Additional details regarding NR codebook types can be found in 3GPP Technical Specification (TS) 38.214.

[0054] To reduce the UL feedback overhead, discrete Fourier transform (DFT)-based spatial domain (SD) CSI compression is applied to the L dimensions of each polarization, where L < N1N2. Hereinafter, the index of the 2L dimensions is referred to as the SD basis index. The magnitude and phase values of the linear combination coefficients for each subband are fed back to the gNB as part of the CSI report. The 2N1N2×N3 codebook for each transmission layer takes the following form:

[0055] W = W1W2

[0056] Among them, matrix W1 is a 2N1N2×2L block-diagonal matrix with two identical diagonal blocks (L < N1N2), that is

[0057]

[0058] And matrix B is an N1N2×L matrix, where the columns are taken from a 2D oversampled DFT matrix, as follows:

[0059]

[0060] Where the superscript T denotes the matrix transpose operation. Note that for the 2D DFT matrix from which matrix B is obtained, the oversampling factors are assumed to be O1 and O2.

[0061] Note that matrix W1 is common in all transmission layers. Matrix W2 is a 2L×N3 matrix, where the i-th column corresponds to the linear combination coefficients of the 2L beams in the i-th subband. Only the indices of L selected columns of B are reported, as well as the oversampling index taking the value of O1O2. Note that W2 is independent for different transmission layers.

[0062] Regarding 3GPP NR Rel-15, for the Type-II port selection (PS) codebook, only K (where K ≤ 2N1N2) beamformed CSI-RS ports are utilized in DL transmission to reduce complexity. The K×N3 codebook matrix for each transmission layer takes the following form:

[0063]

[0064] Here, matrix W2 follows the same structure as the traditional NR Rel-15 Type-II codebook and is specific to the transmission layer. It is a K×2L block-diagonal matrix with two identical diagonal blocks, that is

[0065]

[0066] And E is a K / 2×L matrix, the columns of which are standard unit vectors, as follows:

[0067] Where is a standard unit vector, where it is 1 at the i-th position. Here, d PS is an RRC parameter, which takes values in the set {1, 2, 3, 4} under the condition that d PS ≤ min(K / 2, L), while m PS takes values of and is reported as part of the UL CSI feedback overhead. The matrix W1 is common in all transmission layers.

[0068] For K=16, L=4 and d PS =1, and m PS ={0, 1, ..., 7}, the eight possible implementations of E are as follows:

[0069]

[0070] When PS =2, and m PS = {0, 1, 2, 3} The four possible realizations of E corresponding to are as follows

[0071]

[0072] When PS =3, and m PS = {0, 1, 2} The three possible realizations of E corresponding to are as follows

[0073]

[0074] When PS =4, and m PS = {0, 1} The two possible realizations of E corresponding to are as follows

[0075]

[0076] In short, m PS parameterizes the position of the first 1 in the first column of E, and d PS Indicates different from m PS Shift the row by the corresponding value.

[0077] Regarding 3GPP NR Rel-15, Type-I codebook is the baseline codebook for NR with multiple configurations. The most common use of Rel-15 Type-I codebook is a special case of NR Rel-15 Type-II codebook, where L=1 for rank indicator (RI)=1,2, where the phase coupling value for each subband is reported, i.e., W 2，l is 2×N3, where the first row is equal to [1, 1, …, 1] and the second row is equal to In certain configurations, φ0=φ1…=φ, i.e. wideband reporting. For RI>2, different beams are used for each pair of transmission layers. The NR Rel-15 Type-I codebook can be described as a low-resolution version of the NR Rel-15 Type-II codebook, with spatial beam selection for each transmission layer pair and only phase combining.

[0078] Regarding the 3GPP NR Rel-16 Type-II codebook, assume that the gNB is equipped with a 2D antenna array having N1 and N2 antenna ports placed in horizontal and vertical polarizations, and communication occurs on N3 PMI subbands. A PMI subband consists of a set of resource blocks, and each resource block consists of a set of subcarriers. In this case, 2N1N2N3 CSI-RS ports are utilized to achieve high-resolution DL channel estimation for the NR Rel-16 Type-II codebook. To reduce the UL feedback overhead, DFT-based SD CSI compression is applied to the L dimensions of each polarization, where L < N1N2. Similarly, additional compression is applied in the frequency domain (FD), where each beam of the FD precoding vector is transformed to the delay domain using an inverse DFT matrix, and the magnitude and phase values of a subset of the delay domain coefficients are selected and fed back to the gNB as part of the CSI report.

[0079] The 2N1N2×N3 codebooks for each transmission layer take the following form:

[0080]

[0081] where the matrix W1 is a 2N1N2×2L block-diagonal matrix with two identical diagonal blocks (L < N1N2), i.e.,

[0082]

[0083] and the matrix B is an N1N2×L matrix, where the columns are taken from a 2D oversampled DFT matrix as follows:

[0084]

[0085] where the superscript T denotes the matrix transpose operation, and the superscript H denotes the matrix Hermitian, i.e., the conjugate transpose operation. Note that for the 2D DFT matrix from which the matrix B is taken, the oversampling factors are assumed to be O1 and O2. Note that W1 is common across all transmission layers. In various embodiments, the above parameters comply with the definitions and procedures of 3GPP TS 38.214.

[0086] The matrix W f is an N3×M matrix (where M < N3), where the columns are selected from a DFT matrix of critically sampled size N3 as follows:

[0087]

[0088] Only the indices of the L selected columns of B, and the oversampling indices taking the values of O1O2, are reported. Similarly, for Wf , only the indices of the M selected columns in the DFT matrix of predefined size N3 are reported. In the following, the index of the M dimension is called the selected FD basis index. Therefore, L and M represent the equivalent spatial and frequency dimensions after compression, respectively. Finally, the 2L×M matrix Represents the linear combination coefficients (LCC) of the spatial and frequency DFT basis vectors. and W f Both are selected independently for different transport layers.

[0089] The amplitude (i.e. magnitude) and phase values ​​of approximately β fraction of the 2LM available coefficients are reported to the gNB as part of the CSI report (β < 1). Note that coefficients with zero amplitude are indicated via a bitmap for each transmission layer. Since all coefficients reported within a transmission layer are normalized relative to the coefficient with the largest amplitude (the strongest coefficient), the relative value of this coefficient is set to 1 (i.e. one) and amplitude or phase information for this coefficient is not explicitly reported. Only an indication of the index of the strongest coefficient for each transmission layer is reported. Therefore, each transmission layer reports the strongest coefficient. The CSI report size is significantly reduced compared to the theoretical design of reporting 2N1N2×N3-1 coefficient information.

[0090] Regarding 3GPP NR Rel-16, for Type-IIPS codebook, only K beamformed CSI-RS ports (where K≤2N1N2) are used in DL transmission to reduce complexity. The K×N3 codebook matrix for each transmission layer takes the following form:

[0091]

[0092] The superscript H Indicates the Hermitian matrix, that is, the conjugate transpose operation.

[0093] Here, and W f The same structure as the above-mentioned legacy NR Rel-16 Type-II codebook is followed, where both are transport layer specific. is a K×2L block-diagonal matrix, having the same matrix as in the above NR Rel-15 Type-IIPS codebook.

[0094] Regarding codebook reporting, the CSI codebook report can be divided into two parts based on the priority of the reported information. Each part is encoded separately. Please note that part 1 of the codebook report (i.e., CSI report part 1) may have a higher code rate. Only the parameters for the NR Rel-16 Type-II codebook are listed below. More details can be found in 3GPP TS 38.214 Sections 5.2.3 and 5.2.4.

[0095] Regarding the content of the CSI report, CSI report part 1 includes: rank indicator (RI), plus channel quality indicator (CQI), plus the total number of coefficients (i.e., represented by a single value). CSI report part 2 includes: SD basis indicator, plus FD basis indicator for each transmission layer, plus bitmap for each transmission layer, plus coefficient amplitude information for each transmission layer, plus coefficient phase information for each transmission layer, plus the strongest coefficient indicator for each transmission layer.

[0096] In addition, CSI report part 2 can be decomposed into sub-parts each with different priorities (high priority information is listed first). This division is needed to allow dynamic reporting of the size for the codebook based on the available resources in the uplink phase. More details can be found in 3GPP TS 38.214 section 5.2.3.

[0097] In addition, the Type-II codebook is based on aperiodic CSI reporting and is reported in PUSCH only via downlink control information (DCI) triggering (one exception). The Type-I codebook can be based on periodic CSI reporting (e.g., physical uplink control channel (PUCCH)) or semi-persistent CSI reporting (e.g., PUSCH or PUCCH) or aperiodic reporting (e.g., PUSCH).

[0098] Regarding the priority report for CSI report part 2, please note that multiple (i.e., up to N) Rep The priority of each CSI report is shown in Table 1 below:

[0099]

[0100]

[0101] Table 1: Priority reporting levels for Part 2 CSI reporting

[0102] Please note that CSI reports N RepThe priority is based on the following items: 1) A CSI report corresponding to one CSI report configuration for one cell may have a higher priority than another CSI report corresponding to another CSI report configuration for the same cell; 2) A CSI report for one cell may have a higher priority than other CSI reports for another cell; 3) A CSI report may have a higher priority based on the CSI report content, for example, a CSI report carrying Layer 1 Reference Signal Received Power (L1-RSRP) information has a higher priority; and 4) A CSI report may have a higher priority based on its type, for example, whether the CSI report is non-periodic, semi-persistent or periodic, and whether the report is sent via PUSCH or PUCCH may affect the priority of the CSI report.

[0103] In view of this, CSI reports may be prioritized in the following manner, where CSI reports with lower IDs have higher priority:

[0104] Pri iCSI (y, kc, s) = 2·N cells ·M s y+N cells ·M s ·k+M s c+s where s represents the CSI report configuration index; Ms represents the maximum number of CSI report configurations; c represents the cell index, and Ncells represents the number of serving cells; k is 0 for CSI reports carrying L1-RSRP or layer 1 signal to interference and noise ratio (L1-SINR), otherwise it is 1; y is 0 for aperiodic (AP) reporting, 1 for semi-persistent (SP) reporting on PUSCH, 2 for semi-persistent (SP) reporting on PUCCH, and 3 for periodic reporting.

[0105] Regarding triggering aperiodic CSI reporting on PUSCH, the UE needs to report the CSI information required by the network using the CSI framework in NR Release 15. The triggering mechanism between the reporting configuration and the resource configuration can be summarized in Table 2 below:

[0106]

[0107] Table 2: Triggering mechanism between report settings and resource settings

[0108] In addition, all associated resource settings for CSI reporting settings need to have the same time domain behavior. After configuration by RRC, periodic CSI-RS resources and / or CSI-IM resources and CSI reports are always assumed to be present and active. Aperiodic and semi-persistent CSI-RS resources and / or CSI-IM resources and CSI reports need to be explicitly triggered or activated. For aperiodic CSI-RS resources and / or CSI-IM resources and aperiodic CSI reports, the triggering is done jointly by sending DCI formats 0-1. Semi-persistent CSI-RS resources and / or CSI-IM resources and semi-persistent CSI reports are activated independently.

[0109] Figure 3 An exemplary scenario 300 is depicted that defines an aperiodic trigger state for a list of CSI report settings according to an embodiment of the present disclosure. For aperiodic CSI-RS resources and / or CSI-IM resources and aperiodic CSI reporting, the triggering is done jointly by sending DCI format 0_1. DCI format 0_1 ​​contains a CSI request field (0 to 6 bits). A non-zero request field points to a so-called aperiodic trigger state configured by RRC. The aperiodic trigger state is in turn defined as a list of up to 16 aperiodic CSI report settings, identified by a CSI report setting ID, for which the UE simultaneously calculates the CSI and sends it on a scheduled PUSCH transmission.

[0110] Figure 4A Depicted is an exemplary ASN.1 structure indicating aperiodic triggering status of resource sets and QCL information according to an embodiment of the present disclosure.

[0111] Figure 4B An exemplary ASN.1 structure of an associated CSI resource configuration according to an embodiment of the present disclosure is depicted. One or more associated CSI resource configurations may be represented by Figure 4A The non-periodic trigger state is used to reference.

[0112] Figure 5A Depicted is an exemplary ASN.1 structure for RRC configuration of NZP CSI-RS resources according to an embodiment of the present disclosure.

[0113] Figure 5B Depicted is an exemplary ASN.1 structure for RRC configuration of CSI-IM resources according to an embodiment of the present disclosure.

[0114] When a CSI report setting is linked to an aperiodic resource setting (which may include multiple resource sets), the aperiodic NZP CSI-RS resource set for channel measurement, the aperiodic CSI-IM resource set (if used), and the aperiodic NZP CSI-RS resource set for interference management (if used) for a given CSI report setting are also included in the aperiodic trigger state definition. For the aperiodic NZP CSI-RS, the QCL source to be used is also configured in the aperiodic trigger state. The UE assumes that the resources used to calculate the channel and interference can be processed with the same spatial filter, i.e., quasi-co-located with respect to "QCL-TypeD".

[0115] For aperiodic CSI reporting, the PUSCH-based report is divided into two CSI parts: CSI Part 1 and CSI Part 2. The reason for this is that the size of the CSI payload varies greatly, so the worst-case UCI payload size design will result in a large overhead.

[0116] CSI part 2 has a fixed payload size (and can be decoded by the gNB without prior information) and contains the following items: 1) RI (if reported), CRI (if reported) and CQI for the first codeword, and 2) the number of non-zero wideband amplitude coefficients for each transmission layer for Type-II CSI feedback on PUSCH.

[0117] CSI part 2 has a variable payload size that can be derived from the CSI parameters in CSI part 1 and contains the PMI and CQI() for the second codeword when RI>4.

[0118] Table 3 summarizes the types of UL channels used for CSI reporting as a function of CSI codebook type.

[0119]

[0120] Table 3: Uplink channels used for CSI reporting as a function of CSI codebook type

[0121] As an example, if the aperiodic trigger state indicated by DCI format 0_1 ​​defines 3 reporting settings x, y and z, then the aperiodic CSI reports for CSI part 2 will be ordered.

[0122] Fig. 6A An exemplary scenario of CSI report generation according to an embodiment of the present disclosure is depicted. In the depicted example, DCI format 0_1 ​​depicts reporting settings for three CSI reporting configurations x, y, and z.

[0123] Figure 6BAn exemplary scenario for partial CSI omission and reordering of PUSCH-based CSI according to an embodiment of the present disclosure is depicted.

[0124] CSI reports are prioritized based on: 1) time domain behavior and physical channel, where more dynamic reports are given priority over less dynamic reports, and PUSCH takes precedence over PUCCH; 2) CSI content, where beam reports (i.e. L1-RSRP reports) have priority over regular CSI reports; 3) the serving cell to which the CSI corresponds (in case of carrier aggregation operation). CSI corresponding to the primary cell (PCell) has priority over CSI corresponding to the secondary cell (SCell), and 4) the configuration identifier (i.e. reportConfigID).

[0125] The CSI report may include the number of CQI reports corresponding to the channel quality, assuming a maximum target transport block error rate, which indicates the modulation order, code rate, and the corresponding spectral efficiency associated with the modulation order and code rate pair. Examples of maximum transport block error rates are 0.1 and 0.00001. The modulation order can vary from quadrature phase shift keying (QPSK) to 1024 quadrature amplitude modulation (1024-QAM), while the code rate can vary from 30 / 1024 to 948 / 1024. An example of a CQI table for a 4-bit CQI indicator is provided in Table 4, which identifies possible CQI values ​​with corresponding modulation order, code rate, and efficiency, as shown below:

[0126]

[0127] Table 4: Example of a 4-bit CQI table

[0128] The CQI value can be reported in two formats: a wideband format, where one CQI value corresponding to each physical downlink shared channel (PDSCH) transport block is reported; and a subband format, where one wideband CQI value for the entire transport block is reported, and in addition a set of subband CQI values ​​corresponding to the CQI subband on which the transport block is sent is reported. The CQI subband size is configurable and depends on the number of physical resource blocks (PRBs) in the bandwidth part (BWP), as shown in Table 5 below:

[0129] BWP size (in PRB units) Subband size (in PRB units) 24 to 72 4、8 73 to 144 8、16 145 to 275 16、32

[0130] Table 5: Configurable subband sizes for a given BWP size

[0131] If the upper layer parameter cqi-BitsPerSubband in the CSI report setting CSI-ReportConfig is configured (e.g., via RRC signaling), the subband CQI value is reported in full form, that is, 4 bits are used for each subband CQI based on the CQI table (e.g., Table 4). If the upper layer parameter cqi-BitsPerSubband in CSI-ReportConfig is not configured, a 2-bit subband differential CQI value is reported for each subband s, which is defined as: subband offset level of s = subband CQI index of s - wideband CQI index.

[0132] The mapping from the 2-bit subband differential CQI value to the offset level is shown in Table 6 below:

[0133] Subband differential CQI value Offset Level 0 0 1 1 2 ≥2 3 ≤-1

[0134] Table 6: Mapping of subband differential CQI values ​​to offset levels

[0135] With respect to antenna panels / ports, quasi-co-location (QCL), transmission configuration indicator (TCI) states, and spatial relationships, in some embodiments, the terms antenna, panel, and antenna panel may be used interchangeably. An antenna panel may be hardware used to transmit and / or receive radio signals at frequencies below 6 GHz (e.g., frequency range 1 (FR1)) or above 6 GHz (e.g., frequency range 2 (FR2) or millimeter wave (mmWave)). In some embodiments, the antenna panel may include an array of antenna elements, where each antenna element is connected to hardware such as a phase shifter that allows a control module to apply spatial parameters for transmitting and / or receiving signals. The resulting radiation pattern may be referred to as a beam, which may or may not be unimodal, and may allow the device to amplify signals sent or received from a spatial direction.

[0136] In some embodiments, the antenna panels may or may not be virtualized as antenna ports in the specification. The antenna panels may be connected to the baseband processing module via radio frequency (RF) chains for each transmission (egress) and reception (ingress) direction. The capabilities of the device in terms of the number of antenna panels, its duplex capabilities, its beamforming capabilities, etc. may or may not be transparent to other devices. In some embodiments, the capability information may be transmitted via signaling, or in some embodiments, the capability information may be provided to the device without the need for signaling. Where such information is available to other devices, it may be used for signaling or for making local decisions.

[0137] In some embodiments, a device (e.g., UE, node) antenna panel may be a physical or logical antenna array that includes a collection of antenna elements or antenna ports that share a common or important portion of an RF chain (e.g., in-phase / quadrature (I / Q) modulator, analog-to-digital (A / D) converter, local oscillator, phase shift network). A device antenna panel or "device panel" may be a logical entity having physical device antennas mapped to logical entities, wherein. The mapping of physical device antennas to logical entities may depend on the device implementation. Communicating (receiving or transmitting) on ​​at least a subset of the antenna elements or antenna ports of the antenna panel that are used to radiate energy (also referred to herein as active elements) requires biasing or turning on the RF chain, which results in current consumption or power consumption in the device associated with the antenna panel (including power amplifier / low noise amplifier (LNA) power consumption associated with the antenna elements or antenna ports). The phrase "active in radiating energy" as used herein does not mean limited to transmit functionality, but also includes receive functionality. Thus, the antenna elements active in radiating energy may be simultaneously or sequentially coupled to a transmitter to transmit RF energy or to a receiver to receive RF energy, or generally coupled to a transceiver for performing its intended function. Communicating on the active elements of the antenna panel can generate a radiation pattern or beam.

[0138] In some embodiments, depending on the implementation of the device itself, the "device panel" may have at least one of the following functions as an operable role: a group of antenna elements that independently control its transmit (Tx) beam, a group of antenna elements that independently control its transmission power, and a group of antenna elements that independently control its transmission timing. The "device panel" may be transparent to the gNB. For certain (multiple) conditions, the gNB or the network may assume that the mapping between the physical antenna of the device and the logical entity "device panel" may not be changed. For example, the condition may include until the next update or report from the device, or include the duration for which the gNB assumes that the mapping will not change. The device may report its capabilities regarding the "device panel" to the gNB or the network. The device capabilities may include at least the number of "device panels". In one implementation, the device may support UL transmissions from one beam within a panel; for multiple panels, more than one beam (one beam per panel) may be used for UL transmission. In another implementation, each panel may support / use more than one beam for UL transmission.

[0139] In some of the described embodiments, antenna ports are defined such that the channel over which a symbol on an antenna port is transmitted can be inferred from the channel over which another symbol on the same antenna port is transmitted.

[0140] Two antenna ports are said to be quasi-co-located (QCL) if large-scale properties of the channel through which symbols on one antenna port are transmitted can be inferred from the channel through which symbols on the other antenna port are transmitted. Large-scale properties include one or more of the following: delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial receive (Rx) parameters. Two antenna ports can be QCL with respect to a subset of large-scale properties, and different subsets of large-scale properties can be indicated by the QCL type parameter.

[0141] The QCL type parameter may indicate which channel properties are the same between two reference signals (e.g., on two antenna ports). Thus, the reference signals may be linked to each other with respect to the UE's assumptions about its channel statistics or QCL properties. For example, the parameter qcl-Type may take one of the following values:

[0142] "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0143] "QCL-TypeB": {Doppler shift, Doppler spread}

[0144] "QCL-TypeC": {Doppler shift, average delay}

[0145] "QCL-TypeD": {spatial Rx parameters}

[0146] The spatial Rx parameters may include one or more of the following: angle of arrival (AoA), main AoA, average AoA, angular spread, power angular spectrum (PAS) of AoA, average departure angle (AoD), PAS of AoD, transmit / receive channel correlation, transmit / receive beamforming, spatial channel correlation, etc.

[0147] The values ​​QCL-TypeA, QCL-TypeB, and QCL-TypeC may be applicable to all carrier frequencies, but the value QCL-TypeD may only be applicable to higher carrier frequencies (e.g., mmWave, FR2 and above), where the UE may not be able to perform omni-directional transmissions by nature, i.e., the UE needs to form a beam for directional transmissions. QCL-TypeD parameters between two reference signals A and B, reference signal A is considered to be spatially co-located with reference signal B, and the UE may assume that reference signal A and reference signal B can be received using the same spatial filter (e.g., using the same Rx beamforming weights).

[0148] An "antenna port" according to an embodiment may be a logical port that may correspond to a beam (generated from beamforming) or to a physical antenna on a device. In some embodiments, a physical antenna may be directly mapped to a single antenna port, where the antenna port corresponds to an actual physical antenna. Alternatively, a set or subset of physical antennas, an antenna set or an antenna array or an antenna subarray may be mapped to one or more antenna ports after applying complex weights, cyclic delays, or both to the signal on each physical antenna. A physical antenna set may have antennas from a single module or panel or from multiple modules or panels. The weights may be fixed as in an antenna virtualization scheme, such as cyclic delay diversity (CDD). The process used to derive antenna ports from physical antennas may be device-specific and transparent to other devices.

[0149] In some of the described embodiments, a transmission configuration indication (TCI) state associated with a target transmission may indicate parameters for configuring a QCL relationship between a target transmission (e.g., a target reference signal (RS) for a demodulation reference signal (DM-RS) port of a target transmission during a transmission opportunity) and (multiple) source reference signals (e.g., a synchronization signal block (SSB), a CSI-RS, and / or a sounding reference signal (SRS)) for (multiple) quasi-co-location type parameters indicated in the corresponding TCI state. The TCI describes which reference signals are used as QCL sources and which QCL properties may be derived from each reference signal. A device may receive a configuration of multiple transmission configuration indicator states for a serving cell for transmission on the serving cell. In some of the described embodiments, the TCI state includes at least one source RS to provide a reference (UE assumption) for determining the QCL and / or spatial filter.

[0150] In some of the described embodiments, the spatial relationship information associated with the target transmission may indicate parameters for configuring a spatial setting between the target transmission and a reference RS (e.g., SSB / CSI-RS / SRS). For example, the device may transmit the target transmission using the same spatial domain filter used to receive a reference RS (e.g., DL RS, such as SSB / CSI-RS). In another example, the device may transmit the target transmission using the same spatial domain transmission filter used to transmit a reference RS (e.g., UL RS, such as SRS). The device may receive a configuration of multiple spatial relationship information configurations for a serving cell for transmission on the serving cell.

[0151] In the following solutions, it is assumed that the codebook type used for PMI reporting is flexible (e.g., arbitrary) for using different codebook types, such as Type-II Rel-16 codebook, Type-II Release 17 (Rel-17) codebook, Type-II Release 18 (Rel-18) codebook, etc. Several solution sets are described below. Depending on possible implementations, one or more elements or features of one or more solutions from the described solution sets may be combined.

[0152] According to an embodiment of the first solution, the UE is configured with a CSI report configuration, which includes: configuration information corresponding to a reference signal used for channel measurement, and configuration information corresponding to a CSI report feedback for reporting multiple CSI report segments. For the proposed high-speed CSI codebook, different implementations of the precoder structure and the corresponding CSI report settings are defined. Regarding the CSI report configuration, please note that one or more of the following implementations can be combined.

[0153] In a first implementation of the first solution, the UE is configured with a CSI report setting CSI-ReportConfig associated with multiple PMI values, wherein the multiple PMI values ​​are reported in the same CSI report. In other words, the UE is configured to report multiple PMI values ​​for each CSI report, wherein the multiple CSI reporting segments are multiple PMI values.

[0154] In a second implementation of the first solution, the UE is configured with a CSI report setting CSI-ReportConfig associated with a plurality of coefficient groups, each of the coefficient groups comprising a set of phase coefficients, amplitude coefficients, wherein the amplitude coefficients comprise reference amplitude coefficients and differential amplitude coefficients. In other words, the UE is configured to report a plurality of coefficient groups (i.e., a plurality of W2 matrices) for each CSI report, wherein a plurality of CSI report segments are a plurality of coefficient groups.

[0155] In one example, four sets of coefficients are reported, G=4, i.e., g=1, 2, 3, 4, where the reference amplitude coefficient indicators and the differential amplitude coefficient indicators are indexed as i for transmission layers l=1, ..., v in the form 2，3，l，g and i 2，4，l，g :

[0156]

[0157] The phase coefficient indicator is of the following form:

[0158]

[0159] c l，g，f =[c l，g，0，f …cl，g，2L-1，f ]

[0160] c l，g，i，f ∈{0,…,K3-1}

[0161] The bitmap identifying non-zero amplitude coefficients is defined by the parameter i 1，7，l，g The instructions are as follows:

[0162]

[0163] In a third implementation of the first solution, the UE is configured with a CSI reporting setting associated with a plurality of Doppler domain basis vectors, each Doppler domain basis vector corresponding to a column of a DFT-based matrix. In other words, the UE is configured to report a Doppler domain transform matrix, i.e., including a plurality of Doppler domain basis vectors for each CSI report, wherein a plurality of CSI reporting segments are a plurality of Doppler domain basis vectors.

[0164] In one example, the precoding matrix fed back as PMI in the corresponding CSI report is The form, where the operation Corresponding to the Kronecker product, the superscript H is the conjugate transpose (Hermitian transpose) of the matrix, W1, W f They correspond to the spatial domain transformation matrix based on 2D DFT, the amplitude / phase quantization coefficient matrix, and the frequency domain transformation matrix based on DFT, respectively, and W d is a DFT-based time / Doppler domain basis transform with D columns, whose columns are selected from a DFT matrix of size N4×N4, D≤N4, whose columns r are of the following form:

[0165]

[0166] In a fourth implementation of the first solution, the UE is configured with multiple NZP CSI-RS resources for channel measurement resources (CMRs). More generally, one or more NZP CSI-RS resources for CMRs are associated with multiple channel measurement opportunities. In other words, the UE is configured to report multiple CMRs for each CSI report, where multiple CSI reporting segments are multiple CMRs.

[0167] In a first example, the UE is configured with aperiodic NZP CSI-RS resources for CMR, followed by periodic NZP CSI-RS resources for CMR.

[0168] In a second example, the UE is configured with one periodic NZP CSI-RS resource for CMR, where each channel measurement is associated with a subset of transmission opportunities of the CMR.

[0169] In a third example, the UE is configured with two periodic NZP CSI-RS resources for CMRs, where each CMR is associated with a different slot offset value, where each channel measurement is associated with a group of consecutive CSI-RS symbols across the two CMRs.

[0170] In a fifth implementation of the first solution, the UE is configured with a codebook type (e.g., TypeII) set to a Type-II codebook and a codebook subtype (e.g., TypeII-HighSpeed-r18) set to a high-speed codebook as part of a Rel-18 codebook configuration (e.g., codebookConfig-r18). In other words, the UE is configured to report a Rel-18 Type-II high-speed codebook.

[0171] According to an embodiment of the second solution, the UE is configured to report multiple CQI values, wherein the number of CQI values ​​corresponds to the number of CSI reporting segments, such as the number of multiple PMI values, the coefficient groups, the dimension of the Doppler domain transform matrix, the number of multiple CMRs, the channel measurement opportunities, or some combination thereof. Different implementations of CQI reporting are defined, such as an implementation for a high-speed CSI codebook. Regarding CSI reporting enhancements, please note that one or more elements or features from one or more of the following implementations may be combined.

[0172] In a first implementation of the second solution, a first CQI value of the plurality of CQI values ​​is reported based on a higher resolution format, and the remaining CQI values ​​of the plurality of CQI values ​​are reported based on a lower resolution format than the first CQI value.

[0173] In a first example, a CQI format indicator set to "subband" would correspond to a first CQI value of the plurality of CQI values ​​and be reported in subband format, and the remaining CQI values ​​of the plurality of CQI values ​​would be reported in wideband format.

[0174] In a second example, in a scenario where a first CQI value of a plurality of CQI values ​​is reported in a subband format and the remaining CQI values ​​of the plurality of CQI values ​​are reported in a wideband format, a new value of the CQI format indicator is used. For example, a "subband-wideband" value for the CQI format indicator is introduced for the above situation.

[0175] In a third example, a first CQI value of the plurality of CQI values ​​is reported in a subband format and the remaining CQI values ​​of the plurality of CQI values ​​are reported in a wideband format.

[0176] In a second implementation of the second solution, a first CQI value of the plurality of CQI values ​​is reported as an absolute value (eg, in wideband format), and remaining CQI values ​​of the plurality of CQI values ​​are reported based on differential values ​​calculated from the first CQI value of the plurality of CQI values.

[0177] In one example, a 2-bit sub-band differential CQI is defined as:

[0178] CQI k offset level (k) = CQI k index (k) - CQI 1 index, k = 2, 3, ...

[0179] The mapping from 2-bit differential CQI values ​​to offset levels is shown in Table 7 below:

[0180] Subband differential CQI value Offset Level 0 0 1 1 2 ≥2 3 ≤-1

[0181] Table 7: Mapping of differential CQI k to offset levels

[0182] In a third implementation of the second solution, a CQI superslot size corresponding to a group of consecutive time slots is configured based on the number of multiple PMI values, the coefficient group, the dimension of the Doppler domain transform matrix, the number of multiple CMRs, the channel measurement opportunities, or some combination thereof. Under this implementation, each CQI value in the multiple CQI values ​​is associated with a CQI superslot in the multiple CQI superslots.

[0183] In a first example, the number of slots in a slot group, i.e., the CQI superslot size, may be configured by upper layer signaling (e.g., RRC parameters). Alternatively, the CQI superslot size may be based on subcarrier spacing, UE processing capability, UE CSI calculation time, or some combination thereof.

[0184] In a second example, based on the total number of timeslots considered, the CQI superslot size is set by a rule, as shown in Table 8. Note that for some cases, the superslot size may be configured / selected from two values ​​based on predefined rules about possible superslot sizes.

[0185] Time unit (time slot) Superslot size (slot) 4 to 7 2 8 to 16 2、4 17 to 32 4、8

[0186] Table 8: Configurable CQI superslot sizes

[0187] In a fourth implementation of the second solution, each of the multiple CQI values ​​is associated with a given time slot. In other words, a specific sequence of time slots is associated with a CQI value. In the first example, the index of the time slot is in the form of kQ+q, where Q=1, 2, 5, 10, 20, 40, ..., corresponding to the CSI-RS resource periodicity, channel measurement timing, precoder calculation timing, or a combination thereof; where k=0, 1, 2, 3, ..., corresponding to the index of the CQI value; and where q=0, 1, .., Q-1, corresponding to the configured, reported, predefined time slot offset.

[0188] In a fifth implementation of the second solution, the CQI value is calculated using a periodicity lower than that of the PMI report (eg, M PMI ) corresponding to the time domain periodicity (e.g. M CQI In the first example, the PMI periodicity M configured with PMI =20ms, M CQI =5 ms CQI periodicity is configured. In a second example, a reporting quantity including only CQI is supported, ie, the upper layer parameter reportQuantity may be set to the value "CQI".

[0189] According to an embodiment of the third solution, the UE is configured to report at least one CQI value and CQI extrapolation information to implement UE-assisted extrapolation of CQI values. For example, the network can extrapolate the CQI value based on the UE's indication of the CQI slope, change rate, change direction, or a combination thereof. Different implementations of CQI extrapolation from reported CQI values ​​are provided below. It is not excluded to consider a setting combined with one or more of the following implementations.

[0190] In a first implementation, one CQI value corresponding to time slot t is reported, or alternatively, a time interval [s, s+δ] corresponding to a sequence of consecutive time slots is reported. An additional indicator is reported in the CSI report, which identifies at least one of the following items: 1) the direction of change of the CQI value for the subsequent time slot or time interval, for example, whether the CQI value corresponding to the subsequent time slot increases, decreases, or remains unchanged; and / or 2) the magnitude of the change of the CQI value for the subsequent time slot or time interval compared to the first time slot or time interval.

[0191] In one example, a one-bit indicator in a first portion of a CSI report is reported, wherein the one-bit indicator indicates whether a CQI value for a subsequent time slot or time interval is changed compared to a first time slot or time interval.

[0192] A second indicator in a second part of the CSI report is reported according to a value of a one-bit indicator in the first part of the CSI report, wherein the second indicator is reported only when the one-bit indicator indicates that the CQI value for a subsequent time slot or time interval is changed compared to the first time slot or time interval. The second indicator may correspond to a direction of change in the CQI value, or a magnitude of change in the CQI value for the subsequent time slot / time interval, or both.

[0193] In a second implementation, two CQI values ​​corresponding to time slot t and time slot t+t0 are reported, or alternatively, the report corresponds to the time interval [s0, s0+δ] and the time interval [s1, s1+δ], where s1>s0+δ. A function corresponding to the time variation curve of the first indicator and the second indicator around the two CQI indicators is reported by the UE. In other words, the function describes the extrapolation of the CQI values ​​around the two CQI values.

[0194] In a first example, the function corresponding to the time variation curve may be in the form of a linear variation (i.e., uniform variation), a logarithmic variation (i.e., a variation that slows down over subsequent CQI values), or an exponential variation (i.e., a variation that rises over subsequent CQI values). In a second example, the function corresponds to an interpolation function of one or more CQI values ​​within a time slot or time interval within two CQI value indicator reports in a CSI report.

[0195] In a third implementation, the UE reports multiple CQI values ​​for each CSI reporting opportunity. In the first example, multiple CQI values ​​are reported for each reported PMI value in a plurality of reported PMI values. In the second example, multiple CQI values ​​are reported for each reported PMI coefficient group in a plurality of reported PMI coefficient groups.

[0196] In a third example, multiple CQI values ​​are reported for each dimension of a reported Doppler domain transform matrix in multiple dimensions of the reported Doppler domain transform matrix.In a fourth example, multiple CQI values ​​are reported for each CMR / channel measurement opportunity in multiple CMR / channel measurement opportunities.

[0197] Figure 7 An example of a UE 700 according to aspects of the present disclosure is illustrated. The UE 700 may include a processor 702, a memory 704, a controller 706, and a transceiver 708. The processor 702, the memory 704, the controller 706, or the transceiver 708, or various combinations thereof, or various components thereof may be examples of components for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.

[0198] The processor 702, memory 704, controller 706, or transceiver 708, or various combinations or components thereof may be implemented in hardware (e.g., circuitry). The hardware may include a processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or other programmable logic device, or any combination of components configured or otherwise supported to perform the functions described in the present disclosure.

[0199] The processor 702 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, a field programmable gate array (FPGA), or any combination thereof). In some implementations, the processor 702 may be configured to operate the memory 704. In some other implementations, the memory 704 may be integrated into the processor 702. The processor 702 may be configured to execute computer-readable instructions stored in the memory 704 so that the UE 700 performs various functions of the present disclosure.

[0200] The memory 704 may include volatile or non-volatile memory. The memory 704 may store computer-readable, computer-executable code including instructions that, when executed by the processor 702, cause the UE 700 to perform various functions described herein. The code may be stored in a non-transient computer-readable medium such as the memory 704 or another type of memory. Computer-readable media include both non-transient computer storage media and communication media, including any media that facilitates the transfer of a computer program from one location to another. Non-transient storage media may be any available media that can be accessed by a general or special purpose computer.

[0201] In some implementations, the processor 702 and the memory 704 coupled to the processor 702 may be configured to cause the UE 700 to perform one or more of the functions described herein (e.g., the processor 702 executes instructions stored in the memory 704). For example, the processor 702 may support wireless communications at the UE 700 according to the examples disclosed herein. The UE 700 may be configured to support a component for receiving a CSI report setting, and a component for receiving a set of channel measurement reference signals including at least one NZP CSI-RS resource. In some implementations, the CSI report setting includes a codebook type parameter set to a new radio Type-II codebook. In some implementations, the CSI report setting may also include a codebook subtype parameter set to a high-speed codebook.

[0202] In some implementations, the CSI reporting setting indicates a CQI slot group size corresponding to a set of consecutive slots forming a CQI slot group, wherein a single CQI value is reported for each CQI slot group. In certain implementations, the number of CQI slot groups is based on the number of CSI reporting segments.

[0203] In one implementation, the CQI slot group size is configured via an upper layer signaling parameter. In other implementations, the CQI slot group size is based on the value of the subcarrier spacing, UE processing capability, UE CSI calculation time, or a combination thereof.

[0204] UE 700 may be configured to support means for generating a CSI feedback report according to a CSI reporting setting and means for sending the CSI feedback report over a physical uplink channel, wherein the CSI feedback report includes multiple CSI reporting segments and multiple CQI values ​​associated with the multiple CSI reporting segments.

[0205] In some implementations, each CSI reporting segment is associated with at least one CQI value. In some implementations, multiple CSI reporting segments correspond to multiple PMI values.

[0206] In some implementations, the plurality of CSI reporting segments correspond to a plurality of PMI coefficient groups, wherein each coefficient group in the plurality of PMI coefficient groups includes a set of phase coefficients and amplitude coefficients. In some implementations, the set of phase coefficients and amplitude coefficients includes at least one reference amplitude coefficient and at least one differential amplitude coefficient.

[0207] In some implementations, the multiple CSI reporting segments correspond to multiple Doppler domain basis vectors, each Doppler domain basis vector corresponding to a column of a DFT-based matrix. In some implementations, the multiple CSI reporting segments correspond to multiple NZP CSI-RS resources associated with multiple channel measurement opportunities.

[0208] In some implementations, a single CQI value is reported for each CSI reporting segment.In certain implementations, a first CQI value corresponding to a first CSI reporting segment is reported as an absolute value, wherein the remainder of the plurality of CQI values ​​are reported as a set of differential values ​​based on the first CQI value.

[0209] In some implementations, a first CQI value corresponding to a first CSI reporting segment is reported based on a higher resolution format, wherein a remainder of the plurality of CQI values ​​are reported based on a lower resolution format than the first CQI value. In one implementation, the higher resolution format corresponds to a subband format and the lower resolution format corresponds to a wideband format.

[0210] In some implementations, each CQI value in the plurality of CQI values ​​is associated with a slot index, wherein the associated slot index is an index based on a configured CQI reporting periodicity value, an order of reported CQI values, and a slot offset corresponding to the reported CQI value.

[0211] In some implementations, the CSI reporting settings indicate a CQI reporting periodicity and a PMI reporting periodicity. In certain implementations, the corresponding CQI values ​​are reported with a periodicity value that is no greater than a PMI reporting periodicity value.

[0212] In some implementations, a first CSI reporting segment of the plurality of CSI reporting segments is configured to be reported using a first periodicity value different from a second periodicity value corresponding to a CSI reporting segment of the plurality of CSI reporting segments that is subsequent to the first CSI reporting segment.

[0213] In some implementations, the plurality of CQI values ​​associated with the plurality of CSI reporting segments consist of two CQI values ​​corresponding to all of the plurality of CSI reporting segments. In certain implementations, a first CQI value of the two CQI values ​​corresponds to a first CSI reporting segment of the plurality of CSI reporting segments, and a second CQI value of the two CQI values ​​corresponds to a last CSI reporting segment of the plurality of CSI reporting segments.

[0214] In certain implementations, the CSI feedback report also includes an indicator corresponding to a slope for a CQI change within two CQI value reporting occasions corresponding to the two CQI values. In other implementations, the slope indicator includes a change direction value and a magnitude value.

[0215] In some implementations, the CSI reporting settings indicate an extrapolation / interpolation function for CQI calculation within two CQI value reporting occasions corresponding to the two CQI values. In certain implementations, an extrapolation / interpolation function is defined for CQI extrapolation between two CQI value reporting occasions.

[0216] In some implementations, the CSI feedback report includes selecting an extrapolation / interpolation function from a set of extrapolation / interpolation functions. In other implementations, the set of extrapolation / interpolation functions includes at least one of the following: a linear function, a logarithmic function, or an exponential function.

[0217] The controller 706 may manage input and output signals for the UE 700. The controller 706 may also manage peripheral devices that are not integrated into the UE 700. In some implementations, the controller 706 may utilize an operating system (OS), such as Or other operating systems. In some implementations, the controller 706 can be implemented as part of the processor 702.

[0218] In some implementations, the UE 700 may include at least one transceiver 708. In some other implementations, the UE 700 may have more than one transceiver 708. The transceiver 708 may represent a wireless transceiver. The transceiver 708 may include one or more receiver chains 710, one or more transmitter chains 712, or a combination thereof.

[0219] The receiver chain 710 may be configured to receive a signal (e.g., control information, data, packet) over a wireless medium. For example, the receiver chain 710 may include one or more antennas for receiving signals over the air or wireless medium. The receiver chain 710 may include at least one amplifier (e.g., a low noise amplifier (LNA)) configured to amplify the received signal. The receiver chain 710 may include at least one demodulator configured to demodulate the received signal and obtain the transmitted data by inverting the modulation technique applied during signal transmission. The receiver chain 710 may include at least one decoder for decoding and processing the demodulated signal to receive the transmitted data.

[0220] The transmitter chain 712 may be configured to generate and transmit signals (e.g., control information, data, packets). The transmitter chain 712 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes, such as phase shift keying (PSK) or quadrature amplitude modulation (QAM). The transmitter chain 712 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. The transmitter chain 712 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0221] Figure 8 An example of a processor 800 according to aspects of the present disclosure is illustrated. The processor 800 may be an example of a processor configured to perform various operations according to examples as described herein. The processor 800 may include a controller 802, which is configured to perform various operations according to examples as described herein. The processor 800 may optionally include at least one memory 804, which may be, for example, an L1 / L2 / L3 cache. Additionally or alternatively, the processor 800 may optionally include one or more arithmetic logic units (ALUs) 806. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., a bus).

[0222] The processor 800 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receive, obtain, retrieve, send, output, forward, store, determine, identify, access, write, read) according to the examples described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory located locally or included in the processor chipset (e.g., processor 800), or other memory (e.g., random access memory (RAM), read-only memory (ROM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), static RAM (SRAM), ferroelectric RAM (FeRAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase change memory (PCM), etc.).

[0223] The controller 802 may be configured to manage and coordinate various operations (e.g., signaling, receiving, acquiring, retrieving, sending, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 800 so that the processor 800 supports various operations according to the examples as described herein. For example, the controller 802 may operate as a control unit of the processor 800, generating control signals that manage the operation of various components of the processor 800. These control signals include enabling or disabling functional units, selecting data paths, initiating memory accesses, and coordinating the timing of operations.

[0224] The controller 802 may be configured to extract (e.g., obtain, retrieve, receive) instructions from the memory 804 and determine (multiple) subsequent instructions to be executed so that the processor 800 supports various operations according to the examples as described herein. The controller 802 may be configured to track the memory addresses of instructions associated with the memory 804. The controller 802 may be configured to decode instructions to determine the operations to be performed and the operands involved. For example, the controller 802 may be configured to interpret instructions and determine control signals to be output to other components of the processor 800 so that the processor 800 supports various operations according to the examples as described herein. Additionally or alternatively, the controller 802 may be configured to manage data flow within the processor 800. The controller 802 may be configured to control data transfer between registers, arithmetic logic units (ALUs), and other functional units of the processor 800.

[0225] The memory 804 may include one or more caches (e.g., memory local to or included in the processor 800, or other memory such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc.). In some implementations, the memory 804 may reside within or on a processor chipset (e.g., local to the processor 800). In some other implementations, the memory 804 may reside external to the processor chipset (e.g., remote from the processor 800).

[0226] The memory 804 may store computer-readable, computer-executable code including instructions that, when executed by the processor 800, cause the processor 800 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as a system memory or another type of memory. The controller 802 and / or the processor 800 may be configured to execute computer-readable instructions stored in the memory 804 so that the processor 800 performs various functions. For example, the processor 800 and / or the controller 802 may be coupled to or coupled to the memory 804, and the processor 800, the controller 802, and the memory 804 may be configured to perform various functions described herein. In some examples, the processor 800 may include multiple processors, and the memory 804 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be configured individually or collectively to perform various functions described herein.

[0227] One or more ALUs 806 may be configured to support various operations according to examples as described herein. In some implementations, one or more ALUs 806 may reside in or on a processor chipset (e.g., processor 800). In some other implementations, one or more ALUs 806 may reside outside a processor chipset (e.g., processor 800). One or more ALUs 806 may perform one or more calculations on data, such as addition, subtraction, multiplication, and division. For example, one or more ALUs 806 may receive input operands and operation codes that determine the operations to be performed. One or more ALUs 806 may be configured with various logic and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate data according to operations. Additionally or alternatively, one or more ALUs 806 may support logical operations, such as AND, OR, XOR, NOR, and NAND, so that one or more ALUs 806 can process conditional operations, comparisons, and bitwise operations.

[0228] The processor 800 may support wireless communications according to examples as disclosed herein. The processor 800 may be configured or operable to support a component for receiving a CSI report setting, and a component for receiving a set of channel measurement reference signals including at least one NZP CSI-RS resource. In some implementations, the CSI report setting includes a codebook type parameter set to a new radio Type-II codebook. In some implementations, the CSI report setting may also include a codebook subtype parameter set to a high speed codebook.

[0229] In some implementations, the CSI reporting setting indicates a CQI slot group size corresponding to a set of consecutive slots forming a CQI slot group, wherein a single CQI value is reported for each CQI slot group. In certain implementations, the number of CQI slot groups is based on the number of CSI reporting segments.

[0230] In one implementation, the CQI slot group size is configured via an upper layer signaling parameter. In other implementations, the CQI slot group size is based on the value of the subcarrier spacing, UE processing capability, UE CSI calculation time, or a combination thereof.

[0231] Processor 800 may be configured to support means for generating a CSI feedback report according to a CSI reporting setting and means for sending the CSI feedback report over a physical uplink channel, wherein the CSI feedback report comprises a plurality of CSI reporting segments and a plurality of CQI values ​​associated with the plurality of CSI reporting segments.

[0232] In some implementations, each CSI reporting segment is associated with at least one CQI value. In some implementations, multiple CSI reporting segments correspond to multiple PMI values.

[0233] In some implementations, the plurality of CSI reporting segments correspond to a plurality of PMI coefficient groups, wherein each coefficient group in the plurality of PMI coefficient groups includes a set of phase coefficients and amplitude coefficients. In some implementations, the set of phase coefficients and amplitude coefficients includes at least one reference amplitude coefficient and at least one differential amplitude coefficient.

[0234] In some implementations, the multiple CSI reporting segments correspond to multiple Doppler domain basis vectors, each Doppler domain basis vector corresponding to a column of a DFT-based matrix. In some implementations, the multiple CSI reporting segments correspond to multiple NZP CSI-RS resources associated with multiple channel measurement opportunities.

[0235] In some implementations, a single CQI value is reported for each CSI reporting segment.In certain implementations, a first CQI value corresponding to a first CSI reporting segment is reported as an absolute value, wherein the remainder of the plurality of CQI values ​​are reported as a set of differential values ​​based on the first CQI value.

[0236] In some implementations, a first CQI value corresponding to a first CSI reporting segment is reported based on a higher resolution format, wherein a remainder of the plurality of CQI values ​​are reported based on a lower resolution format than the first CQI value. In one implementation, the higher resolution format corresponds to a subband format and the lower resolution format corresponds to a wideband format.

[0237] In some implementations, each CQI value in the plurality of CQI values ​​is associated with a slot index, wherein the associated slot index is an index based on a configured CQI reporting periodicity value, an order of reported CQI values, and a slot offset corresponding to the reported CQI value.

[0238] In some implementations, the CSI reporting settings indicate a CQI reporting periodicity and a PMI reporting periodicity. In certain implementations, the corresponding CQI values ​​are reported with a periodicity value that is no greater than a PMI reporting periodicity value.

[0239] In some implementations, a first CSI reporting segment of the plurality of CSI reporting segments is configured to be reported using a first periodicity value different from a second periodicity value corresponding to a CSI reporting segment of the plurality of CSI reporting segments that is subsequent to the first CSI reporting segment.

[0240] In some implementations, the plurality of CQI values ​​associated with the plurality of CSI reporting segments consist of two CQI values ​​corresponding to all of the plurality of CSI reporting segments. In certain implementations, a first CQI value of the two CQI values ​​corresponds to a first CSI reporting segment of the plurality of CSI reporting segments, and a second CQI value of the two CQI values ​​corresponds to a last CSI reporting segment of the plurality of CSI reporting segments.

[0241] In certain implementations, the CSI feedback report also includes an indicator corresponding to a slope for a CQI change within two CQI value reporting occasions corresponding to the two CQI values. In other implementations, the slope indicator includes a change direction value and a magnitude value.

[0242] In some implementations, the CSI reporting settings indicate an extrapolation / interpolation function for CQI calculation within two CQI value reporting occasions corresponding to the two CQI values. In certain implementations, an extrapolation / interpolation function is defined for CQI extrapolation between two CQI value reporting occasions.

[0243] In some implementations, the CSI feedback report includes selecting an extrapolation / interpolation function from a set of extrapolation / interpolation functions. In other implementations, the set of extrapolation / interpolation functions includes at least one of the following: a linear function, a logarithmic function, or an exponential function.

[0244] Fig. 9 An example of a NE 900 according to aspects of the present disclosure is illustrated. The NE 900 may include a processor 902, a memory 904, a controller 906, and a transceiver 908. The processor 902, the memory 904, the controller 906, or the transceiver 908, or various combinations thereof, or various components thereof, may be examples of components for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.

[0245] The processor 902, memory 904, controller 906, or transceiver 908, or various combinations or components thereof, may be implemented in hardware (e.g., circuitry). The hardware may include a processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or other programmable logic device, or any combination of components configured or otherwise supported to perform the functions described in the present disclosure.

[0246] The processor 902 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof). In some implementations, the processor 902 may be configured to operate the memory 904. In some other implementations, the memory 904 may be integrated into the processor 902. The processor 902 may be configured to execute computer-readable instructions stored in the memory 904 so that the NE 900 performs various functions of the present disclosure.

[0247] The memory 904 may include volatile or non-volatile memory. The memory 904 may store computer-readable, computer-executable code including instructions that, when executed by the processor 902, cause the NE 900 to perform various functions described herein. The code may be stored in a non-transient computer-readable medium (such as the memory 904 or another type of memory). Computer-readable media include non-transient computer storage media and communication media, and communication media include any media that facilitates transferring a computer program from one location to another. Non-transient storage media may be any available media that can be accessed by a general or special purpose computer.

[0248] In some implementations, the processor 902 and the memory 904 coupled to the processor 902 may be configured to cause the NE 900 to perform one or more of the functions described herein (e.g., the processor 902 executes instructions stored in the memory 904). For example, the processor 902 may support wireless communications at the NE 900 according to the examples disclosed herein. The NE 900 may be configured to support a component for sending a CSI report setting to a UE, and a component for sending a set of channel measurement reference signals including at least one NZP CSI-RS resource.

[0249] In some implementations, the CSI report settings include a codebook type parameter set to a new radio Type-II codebook. In some implementations, the CSI report settings may also include a codebook subtype parameter set to a high speed codebook.

[0250] In some implementations, the CSI reporting setting indicates a CQI slot group size corresponding to a set of consecutive slots forming a CQI slot group, wherein a single CQI value is reported for each CQI slot group. In certain implementations, the number of CQI slot groups is based on the number of CSI reporting segments.

[0251] In one implementation, the CQI slot group size is configured via an upper layer signaling parameter. In other implementations, the CQI slot group size is based on the value of the subcarrier spacing, UE processing capability, UE CSI calculation time, or a combination thereof.

[0252] The NE 900 may be configured to support means for receiving a CSI feedback report from a UE over a physical uplink channel according to a CSI reporting setting, the CSI feedback report comprising a plurality of CQI values ​​associated with a plurality of CSI reporting segments, wherein each CSI reporting segment is associated with at least one CQI value.

[0253] In some implementations, each CSI reporting segment is associated with at least one CQI value. In some implementations, multiple CSI reporting segments correspond to multiple PMI values.

[0254] In some implementations, the plurality of CSI reporting segments correspond to a plurality of PMI coefficient groups, wherein each coefficient group of the plurality of PMI coefficient groups includes a set of phase coefficients and amplitude coefficients. In some implementations, the set of phase coefficients and amplitude coefficients includes at least one reference amplitude coefficient and at least one differential amplitude coefficient.

[0255] In some implementations, the multiple CSI reporting segments correspond to multiple Doppler domain basis vectors, each Doppler domain basis vector corresponding to a column of a DFT-based matrix. In some implementations, the multiple CSI reporting segments correspond to multiple NZP CSI-RS resources associated with multiple channel measurement opportunities.

[0256] In some implementations, a single CQI value is reported for each CSI reporting segment.In certain implementations, a first CQI value corresponding to a first CSI reporting segment is reported as an absolute value, wherein the remainder of the plurality of CQI values ​​are reported as a set of differential values ​​based on the first CQI value.

[0257] In some implementations, a first CQI value corresponding to a first CSI reporting segment is reported based on a higher resolution format, wherein a remainder of the plurality of CQI values ​​are reported based on a lower resolution format than the first CQI value. In one implementation, the higher resolution format corresponds to a subband format and the lower resolution format corresponds to a wideband format.

[0258] In some implementations, each CQI value in the plurality of CQI values ​​is associated with a slot index, wherein the associated slot index is an index based on a configured CQI reporting periodicity value, an order of reported CQI values, and a slot offset corresponding to the reported CQI value.

[0259] In some implementations, the CSI reporting settings indicate a CQI reporting periodicity and a PMI reporting periodicity. In certain implementations, the corresponding CQI values ​​are reported with a periodicity value that is no greater than a PMI reporting periodicity value.

[0260] In some implementations, the processor is further configured: a first CSI reporting segment of the plurality of CSI reporting segments is reported using a first periodicity value different from a second periodicity value corresponding to a CSI reporting segment of the plurality of CSI reporting segments subsequent to the first CSI reporting segment.

[0261] In some implementations, the plurality of CQI values ​​associated with the plurality of CSI reporting segments consist of two CQI values ​​corresponding to all of the plurality of CSI reporting segments. In certain implementations, a first CQI value of the two CQI values ​​corresponds to a first CSI reporting segment of the plurality of CSI reporting segments, and a second CQI value of the two CQI values ​​corresponds to a last CSI reporting segment of the plurality of CSI reporting segments.

[0262] In certain implementations, the CSI feedback report also includes an indicator corresponding to a slope for a CQI change within two CQI value reporting occasions corresponding to the two CQI values. In other implementations, the slope indicator includes a change direction value and a magnitude value.

[0263] In some implementations, the CSI reporting settings indicate an extrapolation / interpolation function for CQI calculation within two CQI value reporting occasions corresponding to the two CQI values. In certain implementations, an extrapolation / interpolation function is defined for CQI extrapolation between two CQI value reporting occasions.

[0264] In some implementations, the CSI feedback report includes selecting an extrapolation / interpolation function from a set of extrapolation / interpolation functions. In other implementations, the set of extrapolation / interpolation functions includes at least one of the following: a linear function, a logarithmic function, or an exponential function.

[0265] The controller 906 may manage input and output signals for the NE 900. The controller 906 may also manage peripheral devices that are not integrated into the NE 900. In some implementations, the controller 906 may utilize an operating system (OS), such as Or other operating systems. In some implementations, the controller 906 can be implemented as part of the processor 902.

[0266] In some implementations, the NE 900 may include at least one transceiver 908. In some other implementations, the NE 900 may have more than one transceiver 908. The transceiver 908 may represent a wireless transceiver. The transceiver 908 may include one or more receiver chains 910, one or more transmitter chains 912, or a combination thereof.

[0267] The receiver chain 910 may be configured to receive a signal (e.g., control information, data, packet) over a wireless medium. For example, the receiver chain 910 may include one or more antennas for receiving signals over the air or wireless medium. The receiver chain 910 may include at least one amplifier (e.g., a low noise amplifier (LNA)) configured to amplify the received signal. The receiver chain 910 may include at least one demodulator configured to demodulate the received signal and obtain the transmitted data by inverting the modulation technique applied during the transmission of the signal. The receiving chain 910 may include at least one decoder for decoding and processing the demodulated signal to receive the transmitted data.

[0268] The transmitter chain 912 may be configured to generate and transmit signals (e.g., control information, data, packets). The transmitter chain 912 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes, such as phase shift keying (PSK) or quadrature amplitude modulation (QAM). The transmitter chain 912 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. The transmitter chain 912 may also include one or more antennas for transmitting the amplified signal into the air or in a wireless medium.

[0269] Fig.10 A flow chart of a method 1000 according to aspects of the present disclosure is illustrated. The operations of the method 1000 may be implemented by a UE as described herein. In some implementations, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions.

[0270] At step 1002, method 1000 may include receiving CSI report settings. The operations of step 1002 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1002 may be performed as described in reference to Figure 7 The described UE is performed.

[0271] At step 1004, method 1000 may include receiving a set of channel measurement reference signals including at least one NZP CSI-RS resource. The operations of step 1004 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1004 may be performed as described in reference to Figure 7 The described UE is performed.

[0272] At step 1006, method 1000 may include generating a CSI feedback report according to the CSI reporting setting, the CSI feedback report including a plurality of CSI reporting segments and a plurality of CQI values ​​associated with the plurality of CSI reporting segments. The operations of step 1006 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1006 may be performed as described in reference to Figure 7 The described UE is performed.

[0273] At step 1008, method 1000 may include sending a CSI feedback report. The operations of step 1008 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1008 may be performed as described in reference to Figure 7 The described UE is performed.

[0274] It should be noted that the method 1000 described herein describes one possible implementation, and that the operations and steps may be rearranged or otherwise modified, and that other implementations are possible.

[0275] Fig.11 A flow chart of a method 1100 according to aspects of the present disclosure is illustrated. The operations of the method 1100 may be implemented by a NE as described herein. In some implementations, the NE may execute a set of instructions to control functional elements of the NE to perform the described functions.

[0276] At step 1102, method 1100 may include sending a CSI report setting. The operations of step 1102 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1102 may be performed as described in reference to Fig. 9 The NE described is executed.

[0277] At step 1104, method 1100 may include generating a set of channel measurement reference signals including at least one NZP CSI-RS resource. The operations of step 1104 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1104 may be performed as described in reference to Fig. 9 The NE described is executed.

[0278] At step 1106, method 1100 may include sending a set of channel measurement reference signals to the UE. The operations of step 1106 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1106 may be performed as described in reference to Fig. 9 The NE described is executed.

[0279] At step 1108, method 1100 may include receiving a CSI feedback report according to a CSI reporting setting, the CSI feedback report including a plurality of CQI values ​​associated with a plurality of CSI reporting segments. The operations of step 1108 may be performed according to examples as described herein. In some implementations, aspects of the operations of step 1108 may be performed as described in reference to Fig. 9 The NE described is executed.

[0280] It should be noted that the method 1100 described herein describes one possible implementation, and that the operations and steps may be rearranged or otherwise modified, and that other implementations are possible.

[0281] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein can be applied to other variants without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A user equipment (UE) for wireless communication, comprising: at least one memory; as well as at least one processor coupled to the at least one memory and configured to cause the UE to: Receive channel state information (CSI) report settings; receiving a set of channel measurement reference signals including at least one non-zero power (NZP) CSI reference signal (CSI-RS) resource; generating a CSI feedback report according to the CSI reporting configuration, the CSI feedback report comprising a plurality of CSI reporting segments and a plurality of channel quality indicator (CQI) values ​​associated with the plurality of CSI reporting segments; as well as Send the CSI feedback report.

2. The UE according to claim 1, wherein the plurality of CSI reporting segments correspond to a plurality of precoder matrix indicator (PMI) values.

3. The UE of claim 1, wherein the plurality of CSI report segments correspond to a plurality of precoder matrix indicator (PMI) coefficient groups, wherein each coefficient group of the plurality of PMI coefficient groups comprises a set of phase coefficients and amplitude coefficients.

4. The UE of claim 1, wherein the plurality of CSI reporting segments correspond to one of the following items: a plurality of Doppler domain basis vectors, each Doppler domain basis vector corresponding to a column of a discrete Fourier transform (DFT) based matrix; or a plurality of NZP CSI-RS resources associated with a plurality of channel measurement opportunities; or both. 5 . The UE of claim 1 , wherein the CSI reporting setting includes a codebook type parameter set to a new radio Type-II codebook, wherein the CSI reporting setting includes a codebook subtype parameter set to a high speed codebook. The UE of claim 1 , wherein a single CQI value is reported for each CSI reporting segment.

7. The UE of claim 6, wherein a first CQI value corresponding to a first CSI reporting segment is reported based on a higher resolution format, wherein the remaining portion of the plurality of CQI values ​​are reported based on a lower resolution format compared to the first CQI value, and wherein the higher resolution format corresponds to a subband format, and wherein the lower resolution format corresponds to a wideband format.

8. The UE of claim 6, wherein a first CQI value corresponding to a first CSI reporting segment is reported as an absolute value, and wherein the rest of the plurality of CQI values ​​are reported as a set of differential values ​​based on the first CQI value.

9. The UE of claim 1, wherein the CSI reporting setting indicates a CQI slot group size, the CQI slot group size corresponding to a set of consecutive slots forming a CQI slot group, wherein a single CQI value is reported for each CQI slot group.

10. The UE of claim 9, wherein the number of CQI time slot groups is based on the number of the plurality of CSI reporting segments, and wherein the CQI time slot group size is one of: Configured via upper layer signaling parameters; Based on the value of subcarrier spacing; Based on UE processing capabilities; Calculate time based on UE CSI; or a combination thereof.

11. The UE of claim 1 , wherein each CQI value of the plurality of CQI values ​​is associated with a time slot index, wherein the associated time slot index is based on: The configured CQI reporting periodicity value, an index of the order in which the CQI values ​​are reported, and The timeslot offset corresponding to which the CQI value is reported.

12. The UE according to claim 1, wherein the CSI report setting indicates a CQI reporting periodicity and a precoder matrix indicator (PMI) reporting periodicity, and a value of the CQI reporting periodicity is not greater than a value of the PMI reporting periodicity.

13. The UE according to claim 1, wherein a first CSI reporting segment of the multiple CSI reporting segments is configured to be reported using a first periodicity value different from a second periodicity value, and the second periodicity value corresponds to a CSI reporting segment after the first CSI reporting segment among the multiple CSI reporting segments.

14. The UE of claim 1, wherein the number of the plurality of CQI values ​​associated with the plurality of CSI reporting segments is equal to two CQI values.

15. The UE of claim 14, wherein a first CQI value of the two CQI values ​​corresponds to a first CSI reporting segment of the plurality of CSI reporting segments, and a second CQI value of the two CQI values ​​corresponds to a last CSI reporting segment of the plurality of CSI reporting segments.

16. The UE of claim 14, wherein the CSI feedback report further includes an indicator corresponding to a slope for a CQI change within two CQI value reporting occasions corresponding to the two CQI values, and wherein the indicator includes a change direction value and an amplitude value.

17. The UE according to claim 14, wherein the CSI reporting setting indicates: an extrapolation / interpolation function for CQI calculation within two CQI value reporting occasions corresponding to the two CQI values, and wherein the extrapolation / interpolation function is defined for CQI inference between the two CQI value reporting occasions.

18. A processor for wireless communication, comprising: at least one controller coupled to at least one memory and configured to cause the processor to: Receive channel state information (CSI) report settings; receiving a set of channel measurement reference signals including at least one non-zero power (NZP) CSI reference signal (CSI-RS) resource; generating a CSI feedback report according to the CSI reporting configuration, the CSI feedback report comprising a plurality of CSI reporting segments and a plurality of channel quality indicator (CQI) values ​​associated with the plurality of CSI reporting segments; as well as Send the CSI feedback report.

19. A base station for wireless communication, comprising: at least one memory; as well as at least one processor coupled to the at least one memory and configured to cause the base station to: Send channel state information (CSI) report settings; generating a set of channel measurement reference signals including at least one non-zero power (NZP) CSI reference signal (CSI-RS) resource; Sending the set of channel measurement reference signals to a user equipment (UE); as well as A CSI feedback report is received according to the CSI reporting configuration, the CSI feedback report comprising a plurality of channel quality indicator (CQI) values ​​associated with a plurality of CSI reporting segments.

20. A method performed by a base station, the method comprising: Send channel state information (CSI) report settings; generating a set of channel measurement reference signals including at least one non-zero power (NZP) CSI reference signal (CSI-RS) resource; Sending the set of channel measurement reference signals to a user equipment (UE); as well as A CSI feedback report is received according to the CSI reporting configuration, the CSI feedback report comprising a plurality of channel quality indicator (CQI) values ​​associated with a plurality of CSI reporting segments.

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