WO2023175411A1

WO2023175411A1 - Channel state information reporting using mixed reference signal types

Info

Publication number: WO2023175411A1
Application number: PCT/IB2023/051333
Authority: WO
Inventors: Ahmed HINDY; Vijay Nangia
Original assignee: Lenovo (Singapore) Pte. Ltd.
Priority date: 2022-03-14
Filing date: 2023-02-14
Publication date: 2023-09-21

Abstract

Various aspects of the present disclosure relate to a UE that receives a channel state information (CSI) reporting configuration including configuration information indicating two types of reference signals, a channel state information reference signal (CSI-RS) and a tracking reference signal (TRS) for channel measurement. The UE is further configured with reporting two CSI report segments or parts, a first CSI report segment or part based on TRS and a second CSI report segment or part based on CSI-RS. These two CSI report segments or parts may be separate reports or may be included in a single report. Beamforming the CSI-RS for channel measurement may also be performed based on the TRS-based CSI feedback, where the beamforming is indicated to the UE via a quasi co-location (QCL) information indication between the CSI-RS and the TRS.

Description

CHANNEL STATE INFORMATION REPORTING USING MIXED REFERENCE SIGNAL

TYPES

RELATED APPLICATION

[0001] This application claims priority to U.S. Patent Application Serial No. 63/319,741 filed March 14, 2022 entitled “Channel State Information Reporting Using Mixed Reference Signal Types,” the disclosure of which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

[0002] The present disclosure relates to wireless communications, and more specifically to channel state information (CSI) reporting using mixed reference signal (RS) types.

BACKGROUND

[0003] A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB), a next-generation NodeB (gNB), a radio head, a repeater node, a relay node, a radio-access node, an access point (AP), or other suitable terminology. Each network communication device, such as a base station, may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE), a sensor, a fixed wireless access node, a vehicular node, or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system, such as time resources (e.g., symbols, slots, subslots, mini-slots, aggregated slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers, bandwidth parts, resource blocks, resource elements). Additionally, the wireless communications system may support wireless communications across various radio access technologies (RATs) including third generation (3G) RAT, fourth generation (4G) RAT, fifth generation (5G) RAT, and other suitable RATs beyond 5G. In some cases, a wireless communications system may be a nonterrestrial network (NTN), which may support various communication devices for wireless communications in the NTN. For example, an NTN may include network entities onboard nonterrestrial vehicles such as satellites, unmanned aerial vehicles (UAV), and high-altitude platforms systems (HAPS), as well as network entities on the ground, such as gateway entities capable of transmitting and receiving over long distances.

[0004] For 3rd Generation Partnership Project (3GPP) new radio (NR), CSI feedback is reported by the UE to the network. The CSI feedback provides an indication of the characteristics of a channel, e.g., quality, channel gains, channel phases, number of paths, path delays, at a given time. The CSI feedback can take multiple forms based on the CSI feedback report type, size, time and frequency granularity.

SUMMARY

[0005] The present disclosure relates to methods, apparatuses, and systems that support channel state information reporting using mixed reference signal types. A UE is configured with two types of reference signals, a channel state information reference signal (CSI-RS) and a tracking reference signal (TRS) for channel measurement. The TRS is for estimating the large-scale fading parameters of the channel and the CSI-RS is for estimating the small-scale fading parameters of the channel, based on the large-scale fading parameters of the channel. The UE is further configured with reporting two CSI report segments or parts, a first CSI report segment or part based on TRS and a second CSI report segment or part based on CSI-RS. These two CSI report segments or parts may be separate reports or may be included in a single report. Beamforming the CSI-RS for channel measurement may also be performed based on the TRS-based CSI feedback, where the beamforming is indicated to the UE via a quasi co-location (QCL) information indication between the CSI-RS and the TRS.

[0006] By utilizing the described techniques a CSI framework for configuration, measurement, and reporting is provided for UEs moving at high speed. The described techniques resolve inefficiencies that may be present in conventional CSI frameworks for UEs moving at high speed due to the Doppler effect incurred from the highly time-varying nature of the channel due to UE motion.

[0007] Some implementations of the method and apparatuses described herein may include wireless communication at a device (e.g., a UE), and the device receives, from a network node, a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and transmitting, to the network node over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

[0008] In some implementations of the method and apparatuses described herein, the second CSI report segment includes channel state information that is based on the channel state information included in the first CSI report segment. Additionally or alternatively, the CSI-RS corresponds to a non-zero power (NZP) CSI-RS resource that is not configured with higher-layer parameters corresponding to either repetition (‘repetition’) or TRS information (‘trs-info’), and wherein the TRS corresponds to an NZP CSI-RS resource that is configured with a higher-layer parameter corresponding to tracking reference signal information. Additionally or alternatively, the first CSI report segment and the second CSI report segment are two CSI reports or two parts of a same CSI report. Additionally or alternatively, the device receives two CSI reporting settings including a CSI reporting setting that indicates a CSI-RS configuration and a second CSI reporting setting that indicates a TRS configuration. Additionally or alternatively, the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots. Additionally or alternatively, the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported with a first periodicity value, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported with a second periodicity value that is different from the first periodicity value. Additionally or alternatively, the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource comprising an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource comprising an identification number of the TRS. Additionally or alternatively, the CSI reporting configuration includes a CSI reporting configuration with a single codepoint, wherein multiple CSI-RS and TRS pairs are higher-layer configured, and the single codepoint comprises an identification number of a CSI-RS and TRS pair from the multiple CSI-RS and TRS pairs. Additionally or alternatively, the CSI reporting configuration indicates that the TRS and the first CSI report segment are configured with a same timedomain behavior corresponding to TRS reception and the first CSI report segment feedback, and wherein the same time-domain behavior is set to one of a periodic or a semi-persistent behavior with a same periodicity value. Additionally or alternatively, the first CSI report segment and the second CSI report segment are two CSI reports, and wherein the second CSI report segment follows a Type- II codebook configuration, and the first CSI report segment follows a distinct codebook configuration. Additionally or alternatively, the first CSI report segment and the second CSI report segment are two parts of a same CSI report, and wherein the first CSI report segment is associated with a CSI report priority value that is distinct from a CSI report priority value associated with the second CSI report segment. Additionally or alternatively, the first CSI report segment comprises at least one of: a selected subset of frequency/delay-domain basis indices; a selected subset of time/Doppler-domain basis indices; or a selected subset of indices corresponding to frequency/delay-domain basis and time/Doppler-domain basis pairs. Additionally or alternatively, the first CSI report segment comprises an indication of a number of dominant channel paths, and wherein the number of dominant channel paths are in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices; a size of a selected subset of time/Doppler-domain basis indices; or a size of a selected subset of indices corresponding to a pair of frequency/delay-domain basis indices and time/Doppler-domain basis indices. Additionally or alternatively, the first CSI report segment comprises amplitude coefficients corresponding to a subset of the dominant channel paths, and wherein values corresponding to the amplitude coefficients are drawn from a pre-defined codebook. Additionally or alternatively, the first CSI report segment has a fixed payload size, and where zero-padding bits are added to the CSI report if the number of dominant channel paths reported in the CSI report segment is smaller than a configured maximum value of the number of dominant channel paths. Additionally or alternatively, a rank indicator value is reported in the second CSI report segment, and wherein the rank indicator value is constrained by the number of dominant channel paths. Additionally or alternatively, an indicator field reported in the first CSI report segment implies whether the second CSI report segment is reported. Additionally or alternatively, a precoder is based on parameters that are fed back from both the first CSI report segment and the second CSI report segment. Additionally or alternatively, a set of amplitude and phase values corresponding to linear combination coefficients of a codebook of a precoding matrix are reported in the second CSI report segment, and indices of the coefficients corresponding to at least one of spatial-domain basis dimensions, frequency/delay-domain basis dimensions, or time/Doppler domain basis dimensions are based on CSI feedback from the first CSI report segment. Additionally or alternatively, no more than one coefficient corresponding to each NZP CSI-RS port of a set of NZP CSI-RS ports is reported in the second CSI report segment, and wherein the set of NZP CSI-RS ports corresponds to ports of the CSI-RS. Additionally or alternatively, a size of the second report segments is inferred from fields of the first CSI report segment. Additionally or alternatively, the CSI-RS and the TRS are quasicolocated with respect to quasi co-location (QCL) type-D, if applicable, and one of QCL type- A, or QCL type-C. Additionally or alternatively, the CSI-RS and the TRS are quasi-colocated with respect to at least QCL type-A, and wherein Doppler shift and Doppler spread characteristics are ignored with respect to the QCL type. Additionally or alternatively, the first CSI report segment is reported over a physical uplink control channel. Additionally or alternatively, the second CSI report segment is reported over a physical uplink shared channel.

[0009] Some implementations of the method and apparatuses described herein may include wireless communication at a device (e.g., a base station), and the device transmits, to a communication device a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and receives, from the communication device over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

[0010] In some implementations of the method and apparatuses described herein, the second CSI report segment includes channel state information that is based on the channel state information included in the first CSI report segment. Additionally or alternatively, the CSI-RS corresponds to a NZP CSI-RS resource that is not configured with higher-layer parameters corresponding to either repetition or TRS information, and wherein the TRS corresponds to an NZP CSI-RS resource that is configured with a higher-layer parameter corresponding to tracking reference signal information. Additionally or alternatively, the first CSI report segment and the second CSI report segment are two CSI reports or two parts of a same CSI report. Additionally or alternatively, the device transmits two CSI reporting settings including a first CSI reporting setting that indicates a CSI-RS configuration and a second CSI reporting setting that indicates a TRS configuration. Additionally or alternatively, the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots. Additionally or alternatively, the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported with a first periodicity value, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported with a second periodicity value that is different from the first periodicity value. Additionally or alternatively, the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource comprising an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource comprising an identification number of the TRS. Additionally or alternatively, the CSI reporting configuration includes a CSI reporting configuration with a single codepoint, wherein multiple CSI-RS and TRS pairs are higher-layer configured, and the single codepoint comprises an identification number of a CSI-RS and TRS pair from the multiple CSI-RS and TRS pairs. Additionally or alternatively, the CSI reporting configuration indicates that the TRS and the first CSI report segment are configured with a same time-domain behavior corresponding to TRS reception and the first CSI report segment feedback, and wherein the same time-domain behavior is set to one of a periodic or a semi-persistent behavior with a same periodicity value. Additionally or alternatively, the first CSI report segment and the second CSI report segment are two CSI reports, and wherein the second CSI report segment follows a Type-II codebook configuration, and the first CSI report segment follows a distinct codebook configuration. Additionally or alternatively, the first CSI report segment and the second CSI report segment are two parts of a same CSI report, and wherein the first CSI report segment is associated with a CSI report priority value that is distinct from a CSI report priority value associated with the second CSI report segment. Additionally or alternatively, the first CSI report segment comprises at least one of: a selected subset of frequency/delay-domain basis indices; a selected subset of time/Doppler-domain basis indices; or a selected subset of indices corresponding to frequency/delay-domain basis and time/Doppler-domain basis pairs. Additionally or alternatively, the first CSI report segment comprises an indication of a number of dominant channel paths, and wherein the number of dominant channel paths are in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices; a size of a selected subset of time/Doppler-domain basis indices; or a size of a selected subset of indices corresponding to a pair of frequency/delay-domain basis indices and time/Doppler-domain basis indices. Additionally or alternatively, the first CSI report segment comprises amplitude coefficients corresponding to a subset of the dominant channel paths, and wherein values corresponding to the amplitude coefficients are drawn from a pre-defined codebook. Additionally or alternatively, the first CSI report segment has a fixed payload size, and wherein zero-padding bits are added to the CSI report if the number of dominant channel paths reported in the CSI report segment is smaller than a configured maximum value of the number of dominant channel paths. Additionally or alternatively, a rank indicator value is reported in the second CSI report segment, and wherein the rank indicator value is constrained by the number of dominant channel paths. Additionally or alternatively, an indicator field reported in the first CSI report segment implies whether the second CSI report segment is reported. Additionally or alternatively, a precoder is based on parameters that are fed back from both the first CSI report segment and the second CSI report segment. Additionally or alternatively, a set of amplitude and phase values corresponding to linear combination coefficients of a codebook of a precoding matrix are reported in the second CSI report segment, and indices of the coefficients corresponding to at least one of spatial-domain basis dimensions, frequency/delay- domain basis dimensions, or time/Doppler domain basis dimensions are based on CSI feedback from the first CSI report segment. Additionally or alternatively, no more than one coefficient corresponding to each NZP CSI-RS port of a set of NZP CSI-RS ports is reported in the second CSI report segment, and wherein the set of NZP CSI-RS ports corresponds to ports of the CSI-RS. Additionally or alternatively, a size of the second report segments is inferred from fields of the first CSI report segment. Additionally or alternatively, the CSI-RS and the TRS are quasi-colocated with respect to QCL type-D, if applicable, and one of QCL type- A, or QCL type-C. Additionally or alternatively, the CSI-RS and the TRS are quasi-colocated with respect to at least QCL type- A, and wherein Doppler shift and Doppler spread characteristics are ignored with respect to the QCL type. Additionally or alternatively, the first CSI report segment is reported over a physical uplink control channel. Additionally or alternatively, the second CSI report segment is reported over a physical uplink shared channel.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Various aspects of the present disclosure for channel state information reporting using mixed reference signal types are described with reference to the following Figures. The same numbers may be used throughout to reference like features and components shown in the Figures.

[0012] FIG. 1 illustrates an example of a wireless communications system that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure.

[0013] FIG. 2 illustrates an example of a system that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure.

[0014] FIGs. 3, 4, 5, and 6 illustrate examples of matrices as related to channel state information reporting using mixed reference signal types.

[0015] FIG. 7 illustrates an example of aperiodic trigger state defining a list of CSI Report Settings.

[0016] FIG. 8 illustrates an example of aperiodic trigger state.

[0017] FIG. 9 illustrates an example of radio resource control (RRC) configuration for a NZP CSI-RS Resource.

[0018] FIG. 10 illustrates an example of RRC configuration for a CSI interference measurement (IM)-Resource.

[0019] FIG. 11 illustrates an example of CSI reporting.

[0020] FIG. 12 illustrates an example of a block diagram of a device that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure.

[0021] FIG. 13 illustrates an example of a block diagram of a device that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. [0022] FIGs. 14, 15, 16, and 17 illustrate flowcharts of methods that support channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

[0023] Implementations of channel state information reporting using mixed reference signal types are described, such as related to a CSI framework for configuration, measurement, and reporting is provided for UEs moving at high speed.

[0024] The present disclosure relates to methods, apparatuses, and systems that support channel state information reporting using mixed reference signal types. A UE is configured with two types of reference signals, a CSLRS and a TRS for channel measurement. The CSLRS is a CSLRS resource that is not configured with either ‘repetition’ or ‘trs-info’ whereas the TRS is a CSLRS resource that is configured with ‘trs-info’. The TRS is for estimating the large-scale fading parameters of the channel and the CSLRS is for estimating the small-scale fading parameters of the channel, based on the large-scale fading parameters of the channel.

[0025] The UE is further configured with reporting two CSI report segments or parts, a first CSI report segment or part based on TRS (e.g., a TRS-based CSI report) and a second CSI report segment or part based on CSLRS (e.g., CSLRS-based CSI report). The CSLRS-based CSI report content is based on the content of the TRS-based CSI report. These two CSI report segments or parts may be separate reports or may be included in a single report. For example, the UE may be configured with reporting one CSI report, where the CSI report is partitioned into two segments or parts, where a first of the two CSI report segments or parts is based on TRS, and a second of the two CSI report segments or parts is based on CSLRS.

[0026] Beamforming the CSLRS for channel measurement may also be performed based on the TRS-based CSI feedback. The beamforming is indicated to the UE, for example, via a QCL information indication between the CSLRS and the TRS.

[0027] By utilizing the described techniques a CSI framework for configuration, measurement, and reporting is provided for UEs moving at high speed. The described techniques resolve inefficiencies that may be present in conventional CSI frameworks for UEs moving at high speed due to the Doppler effect incurred from the highly time-varying nature of the channel due to UE motion.

[0028] One solution for configuration, measurement, and reporting for a UE moving at high speed includes configuring the UE with periodic CSI-RS measurement and CSI reporting with a small periodicity value. However, this solution has larger CSI-RS overhead and CSI feedback overhead relative to the techniques discussed herein.

[0029] Another solution for configuration, measurement, and reporting for a UE moving at high speed is configuring the UE with a burst of CSI-RSs, as well as feeding back a CSI report in a form of a transformed Delay-Doppler domain. However, this solution involves needing a new CSI-RS configuration with bursty transmission, which requires specification impact that may be beyond the scope of prospective enhancements.

[0030] Another solution for configuration, measurement, and reporting for a UE moving at high speed is configuring the UE with feeding back multiple CSI reports, where the precoder is based on CSI feedback in the multiple CSI reports (e.g., a base report that includes all the parameters of the channel that change slowly and then after that the reports include only the parameters or aspects of the channel that change quickly). However, this solution has error propagation/outage issues - if the network fails to decode a first of the multiple CSI reports, all CSI reports subsequent to the first of the multiple CSI reports have no value. The techniques discussed herein reduce or eliminate any such error propagation/outage issues.

[0031] Aspects of the present disclosure are described in the context of a wireless communications system. Aspects of the present disclosure are further illustrated and described with reference to device diagrams and flowcharts that relate to channel state information reporting using mixed reference signal types.

[0032] FIG. 1 illustrates an example of a wireless communications system 100 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more base stations 102, one or more UEs 104, and a core network 106. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE- Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as a NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA), frequency division multiple access (FDMA), or code division multiple access (CDMA), etc.

[0033] The one or more base stations 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the base stations 102 described herein may be, or include, or may be referred to as a base transceiver station, an access point, a NodeB, an eNodeB (eNB), a next-generation NodeB (gNB), a Radio Head (RH), a relay node, an integrated access and backhaul (IAB) node, or other suitable terminology. A base station 102 and a UE 104 may communicate via a communication link 108, which may be a wireless or wired connection. For example, a base station 102 and a UE 104 may perform wireless communication over a NR-Uu interface.

[0034] A base station 102 may provide a geographic coverage area 110 for which the base station

102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc.) for one or more UEs 104 within the geographic coverage area. For example, a base station 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc.) according to one or multiple radio access technologies. In some implementations, a base station 102 may be moveable, such as when implemented as a gNB onboard a satellite or other non-terrestrial station (NTS) associated with a non-terrestrial network (NTN). In some implementations, different geographic coverage areas 110 associated with the same or different radio access technologies may overlap, and different geographic coverage areas 110 may be associated with different base stations 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0035] The one or more UEs 104 may be dispersed throughout a geographic region or coverage area 110 of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, a customer premise equipment (CPE), a subscriber device, or as some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, a UE 104 may be referred to as an Internet-of-Things (loT) device, an Internet-of-Everything (loE) device, or as a machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In other implementations, a UE 104 may be mobile in the wireless communications system 100, such as an earth station in motion (ESIM).

[0036] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the base stations 102, other UEs 104, or network equipment (e.g., the core network 106, a relay device, a gateway device, an integrated access and backhaul (IAB) node, a location server that implements the location management function (LMF), or other network equipment). Additionally, or alternatively, a UE 104 may support communication with other base stations 102 or UEs 104, which may act as relays in the wireless communications system 100.

[0037] A UE 104 may also support wireless communication directly with other UEs 104 over a communication link 112. For example, a UE 104 may support wireless communication directly with another UE 104 over 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 112 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.

[0038] A base station 102 may support communications with the core network 106, or with another base station 102, or both. For example, a base station 102 may interface with the core network 106 through one or more backhaul links 114 (e.g., via an SI, N2, or other network interface). The base stations 102 may communicate with each other over the backhaul links 114 (e.g., via an X2, Xn, or another network interface). In some implementations, the base stations 102 may communicate with each other directly (e.g., between the base stations 102). In some other implementations, the base stations 102 may communicate with each other indirectly (e.g., via the core network 106). In some implementations, one or more base stations 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC). The ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as remote radio heads, smart radio heads, gateways, transmissionreception points (TRPs), and other network nodes and/or entities.

[0039] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC), or a 5G core (5GC), which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management functions (AMF)), and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a 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 for the one or more UEs 104 served by the one or more base stations 102 associated with the core network 106.

[0040] According to implementations, one or more of the UEs 104 and base stations 102 are operable to implement various aspects of channel state information reporting using mixed reference signal types, as described herein. For instance, a base station 102 can communicate a CSI reporting configuration 116 that includes various information such as configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback. For example, the reference signals used for channel measurement include at least a CSI-RS and a TRS. By way of another example, the configuration information corresponding to CSI reporting feedback indicates two CSI report segments, a first CSI report segment based at least in part on channel measurement via TRS and a second CSI report segment based at least in part on channel measurement via CSI-RS. The UE 104 performs the channel measurement as indicated in the CSI reporting configuration 116 and returns CSI feedback 118 including the first and second CSI report segments.

[0041] FIG. 2 illustrates an example of a system 200 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The system 200 may use the wireless communications system 100 and/or be implemented with the wireless communications system 100. The system 200 includes a base station 102 that communicates with a UE 104 that is located in a moving vehicle. The vehicle is moving at a high speed (e.g., 100 kilometers per hour or more).

[0042] The base station 102 communicates a CSI reporting configuration 202 to the UE 104. The CSI reporting configuration 202 includes various information such as configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback. The base station 102 also communicates the references signals 204 to the UE 104, illustrated as CSI-RS and TRS. The UE 104 uses the CSI-RS and TRS to perform channel measurements and generates a CSI reporting feedback that includes two CSI report segments that the UE 104 transmits to the base station 102. A first CSI report segment 206 is based at least in part on channel measurement via TRS and a second CSI report segment 208 is based at least in part on channel measurement via CSI-RS. In one or more implementations the second CSI report segment 208 includes channel state information that is based on the channel state information included in the first CSI report segment 206 as discussed in more detail below.

[0043] The techniques discussed herein support NR Rel. 16 high-resolution CSI feedback report (Type-II), where the frequency granularity of the CSI feedback can be indirectly parametrized. The techniques discussed herein further support scenarios in which the UE 104 speed is relatively high (up to 500 km/h), and accommodates such scenarios while maintaining similar quality of service, a modified CSI framework, including measurement and reporting.

[0044] The techniques discussed herein support various NR codebook types, such as the NR codebook types discussed in 3 GPP technical specification (TS) 38.214, "Physical layer procedures for data," Mar. 2020. A summary of these techniques follows.

[0045] One codebook type is a NR Rel. 15 Type-II Codebook. Assume the base station 102 is equipped with a two-dimensional (2D) antenna array with Ay, i\b antenna ports per polarization placed horizontally and vertically and communication occurs over N3 precoder matrix indicator (PMI) subbands. A PMI sub-band consists of a set of resource blocks, each resource block consisting of a set of subcarriers. In such case, 2N1N2 CSI-RS ports are utilized to enable downlink (DL) channel estimation with high resolution for NR Rel. 15 Type-II codebook. In order to reduce the uplink (UL) feedback overhead, a Discrete Fourier transform (DFT)-based CSI compression of the spatial domain is applied to L dimensions per polarization, where L<NIN2. In the sequel the indices of the 2L dimensions are referred to as the Spatial Domain (SD) basis indices. The magnitude and phase values of the linear combination coefficients for each sub-band are fed back to the base station 102 as part of the CSI report. The 2N₁N₂xN₃ codebook per layer / takes on the form

where Wi is a 2N₁N₂x2L. block-diagonal matrix (L<N₁N₂) with two identical diagonal blocks, i.e.,

and B is an N₁N₂xL matrix with columns drawn from a 2D oversampled DFT matrix, as follows.

where the superscript ^T denotes a matrix transposition operation. Note that Oi, O2 oversampling factors are assumed for the 2D DFT matrix from which matrix B is drawn. Note that Wi is common across all layers. W2.1 is a 2Lx N₃ matrix, where the i^th column corresponds to the linear combination coefficients of the 2L beams in the i^th sub-band. Only the indices of the L selected columns of B are reported, along with the oversampling index taking on O₁O₂ values. Note that W2,i are independent for different layers.

[0046] One codebook type is a NR Rel. 15 Type-II Port Selection codebook. For Type-II Port Selection codebook, only K (where K < 2N₁N₂) beamformed CSI-RS ports are utilized in DL transmission, in order to reduce complexity. The. The KxN₃ codebook matrix per layer takes on the form

Here, W2 follow the same structure as the conventional NR Rel. 15 Type-II Codebook, and are layer specific. is a Kx2L. block-diagonal matrix with two identical diagonal blocks, i.e.,

and E is an matrix whose columns are standard unit vectors, as follows.

where is a standard unit vector with a 1 at the i^th location. Here dps is an RRC parameter which takes on the values {1,2, 3, 4} under the condition dps < min(K/2, L) whereas mps takes on the values and is reported as part of the UL CSI feedback overhead. Wi is common across all

layers.

[0047] FIG. 3 illustrates an example 300 of matrices as related to channel state information reporting using mixed reference signal types. For K= l 6, L=4 and dps =1, the 8 possible realizations of E corresponding to mps = {0,1,... ,7} are illustrated in the example 300.

[0048] FIG. 4 illustrates an example 400 of matrices as related to channel state information reporting using mixed reference signal types. When dps =2, the 4 possible realizations of E corresponding to mps ={0,1, 2, 3} are illustrated in the example 400.

[0049] FIG. 5 illustrates an example 500 of matrices as related to channel state information reporting using mixed reference signal types. When dps =3, the 3 possible realizations of E corresponding of mps ={0,1,2} are illustrated in the example 500.

[0050] FIG. 6 illustrates an example 600 of matrices as related to channel state information reporting using mixed reference signal types. When dps =4, the 2 possible realizations of E corresponding of mps ={0,1} are illustrated in the example 600.

[0051] To summarize, mps parametrizes the location of the first 1 in the first column of E, whereas dps represents the row shift corresponding to different values of mps.

[0052] One codebook type is a NR Rel. 15 Type-I codebook. The NR Rel. 15 Type-I codebook is the baseline codebook for NR, with a variety of configurations. The most common utility of Rel. 15 Type-I codebook is a special case of NR Rel. 15 Type-II codebook with L=1 for rank indicator (RI)=1,2, where a phase coupling value is reported for each sub-band, i.e., W2,i is 2xN₃, with the first row equal to [1, 1, 1] and the second row equal to Under specific

configurations, Φ_o=Φ₁...= Φ , i.e., wideband reporting. For RI>2 different beams are used for each pair of layers. Obviously, NR Rel. 15 Type-I codebook can be depicted as a low-resolution version of NRRel. 15 Type-II codebook with spatial beam selection per layer-pair and phase combining only. More details on NR Rel. 15 Type-I codebook can be found in Rl-1709232, Samsung et al., "WF on Type I and II CSI codebooks," Hangzhou, China, May 15-19, 2017.

[0053] One codebook type is a NR Rel. 16 Type-II codebook. Assume the base station 102 is equipped with a two-dimensional (2D) antenna array with Ni, N2 antenna ports per polarization placed horizontally and vertically and communication occurs over N3 PMI subbands. A PMI subband consists of a set of resource blocks, each resource block consisting of a set of subcarriers. In such case, 2N₁N₂N₃ CSI-RS ports are utilized to enable DL channel estimation with high resolution for NR Rel. 16 Type-II codebook. In order to reduce the UL feedback overhead, a Discrete Fourier transform (DFT)-based CSI compression of the spatial domain is applied to L dimensions per polarization, where L<NIN2. Similarly, additional compression in the frequency domain is applied, where each beam of the frequency-domain precoding vectors is transformed using an inverse DFT matrix to the delay domain, and the magnitude and phase values of a subset of the delay-domain coefficients are selected and fed back to the base station 102 as part of the CSI report. The 2N₁N₂xN₃ codebook per layer takes on the form

where Wi is a 2N₁N₂x2L block-diagonal matrix (L<N₁N₂) with two identical diagonal blocks, i.e.,

where the superscript ^T denotes a matrix transposition operation. Note that O₁, O₂ oversampling factors are assumed for the 2D DFT matrix from which matrix B is drawn. Note that Wi is common across all layers. W_f is an N₃xM matrix (M<N₃) with columns selected from a critically-sampled size-N₃ DFT matrix, as follows

[0054] Only the indices of the L selected columns of B are reported, along with the oversampling index taking on O₁O₂ values. Similarly, for W_f,l, only the indices of the M selected columns out of the predefined size-N₃ DFT matrix are reported. In the sequel the indices of the AT dimensions are referred as the selected Frequency Domain (FD) basis indices. Hence, L, M represent the equivalent spatial and frequency dimensions after compression, respectively. Finally, the 2LxAT matrix represents

the linear combination coefficients (LCCs) of the spatial and frequency DFT-basis vectors. Both ,

W_f are selected independent for different layers. Magnitude and phase values of an approximately β fraction of the 2LM available coefficients are reported to the base station 102 (β<1 ) as part of the CSI report. Coefficients with zero magnitude are indicated via a per-layer bitmap. Since all coefficients reported within a layer are normalized with respect to the coefficient with the largest magnitude (strongest coefficient), the relative value of that coefficient is set to unity, and no magnitude or phase information is explicitly reported for this coefficient. Only an indication of the index of the strongest coefficient per layer is reported. Hence, for a single-layer transmission, magnitude and phase values of a maximum of [2βLM |-1 coefficients (along with the indices of selected L, AT DFT vectors) are reported per layer, leading to significant reduction in CSI report size, compared with reporting 2N₁N₂xN₃ -1 coefficients’ information.

[0055] One codebook type is a NR Rel. 16 Type-II Port Selection codebook. For Type-II Port Selection codebook, only K (where K < 2N₁N₂) beamformed CSI-RS ports are utilized in DL transmission, in order to reduce complexity. The KxN₃ codebook matrix per layer takes on the form.

Here, and Wi.i follow the same structure as the conventional NR Rel. 16 Type-II Codebook, where both are layer specific. The matrix is a Kx2L block-diagonal matrix with the same

structure as that in the NR Rel. 15 Type-II Port Selection Codebook.

[0056] For codebook reporting, the codebook report is partitioned into two parts based on the priority of information reported. Each part is encoded separately (Part 1 has a possibly higher code rate). Below the parameters for NR Rel. 16 Type-II codebook only are listed. More details can be found in clause 5.2.3-4 of 3GPP TS 38.214, "Physical layer procedures for data," Mar. 2020.

[0057] The content of the CSI report includes Part 1 and Part 2. Part 1 includes the RI plus the channel quality indicator (CQI) plus the total number of coefficients. Part 2 includes the SD basis indicator plus the FD basis indicator/layer plus the bitmap/layer plus the coefficient amplitude information/layer plus the coefficient phase information/layer plus the strongest coefficient indicator/layer. Furthermore, Part 2 CSI can be decomposed into sub-parts each with different priority (higher priority information listed first). Such partitioning is required to allow dynamic reporting size for codebook based on available resources in the uplink phase. More details can be found in clause 5.2.3 of 3GPP TS 38.214, "Physical layer procedures for data," Mar. 2020.

[0058] Also Type-II codebook is based on aperiodic CSI reporting, and only reported in physical uplink shared channel (PUSCH) via downlink control information (DCI) triggering (one exception). Type-I codebook can be based on periodic CSI reporting (physical uplink control channel (PUCCH)) or semi-persistent CSI reporting (PUSCH or PUCCH) or aperiodic reporting (PUSCH).

[0059] For Priority reporting for Part 2 CSI, note that multiple CSI reports may be transmitted with different priorities, as shown in Table 1. Table 1 shows the reporting levels for Part 2 CSI. Table 1

[0060] Note that the priority of the N_Rep CSI reports are based on the following: 1) A CSI report corresponding to one CSI reporting configuration for one cell may have higher priority compared with another CSI report corresponding to one other CSI reporting configuration for the same cell, 2) CSI reports intended to one cell may have higher priority compared with other CSI reports intended to another cell, 3) CSI reports may have higher priority based on the CSI report content, e.g., CSI reports carrying LI - reference signal received power (RSRP) information have higher priority, 4) CSI reports may have higher priority based on their type, e.g., whether the CSI report is aperiodic, semi- persistent or periodic, and whether the report is sent via PUSCH or PUCCH, may impact the priority of the CSI report.

[0061] In light of that, CSI reports may be prioritized as follows, where CSI reports with lower identifiers (IDs) have higher priority

Pri_icsI(y< k, c, s) = 2 · N_cells · M_s · y + A_cells · M_s · k + M_s · c + s where s refers to the CSI reporting configuration index, M_s refers to the maximum number of CSI reporting configurations, c refers to the cell index, N_cells refers to the number of serving cells, k is 0 for CSI reports carrying LI -RSRP or LI - signal-to-interference and noise ratio (SINR), 1 otherwise, and is 0 for aperiodic reports, 1 for semi-persistent reports on PUSCH, 2 for semi-persistent reports on PUCCH, 3 for periodic reports.

[0062] In aspects of channel state information reporting using mixed reference signal types, Aperiodic CSI Reporting on PUSCH is triggered. The UE 104 needs to report the needed CSI information for the network using the CSI framework in NR Release 15. The triggering mechanism between a report setting and a resource setting can be summarized in Table 2 below, which refers to medium access control element (MAC CE), semi-persistent (SP), and aperiodic (AP).

Table 2

[0063] Moreover, all associated Resource Settings for a CSI Report Setting need to have same time domain behavior. Periodic CSI-RS/ IM resource and CSI reports are always assumed to be present and active once configured by RRC. Aperiodic and semi-persistent CSI-RS/ IM resources and CSI reports needs to be explicitly triggered or activated. Aperiodic CSI-RS/ IM resources and aperiodic CSI reports, the triggering is done jointly by transmitting a DCI Format 0-1. Semi-persistent CSI-RS/ IM resources and semi-persistent CSI reports are independently activated.

[0064] For aperiodic CSI-RS/ IM resources and aperiodic CSI reports, the triggering is done jointly by transmitting a DCI Format 0-1. The 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 (see Error! Reference source not found.). An aperiodic trigger state in turn is defined as a list of up to 16 aperiodic CSI Report Settings, identified by a CSI Report Setting ID for which the UE calculates simultaneously CSI and transmits it on the scheduled PUSCH transmission.

[0065] FIG. 7 illustrates an example 700 of aperiodic trigger state defining a list of CSI Report Settings.

[0066] When the CSI Report Setting is linked with aperiodic Resource Setting (can comprise 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 IM (if used) to use for a given CSI Report Setting are also included in the aperiodic trigger state definition

[0067] FIG. 8 illustrates an example 800 of aperiodic trigger state. The example 800 illustrates that aperiodic trigger state indicates the resource set and QCL information.

[0068] For aperiodic NZP CSI-RS, the QCL source to use is also configured in the aperiodic trigger state. The UE assumes that the resources used for the computation of the channel and interference can be processed with the same spatial filter i.e. quasi-co-located with respect to “QCL- TypeD.”

[0069] FIG. 9 illustrates an example 900 of RRC configuration for a NZP CSI-RS Resource.

[0070] FIG. 10 illustrates an example 1000 of RRC configuration for a CSI-IM-Resource.

[0071] Table 3 summarizes the type of uplink channels used for CSI reporting as a function of the CSI codebook type, which refers to subband (SB) and wideband (WB). Table 3

[0072] For aperiodic CSI reporting, PUSCH-based reports are divided into two CSI parts: CSI Parti and CSI Part 2. The reason for this is that the size of CSI payload varies significantly, and therefore a worst-case uplink control information (UCI) payload size design would result in large overhead.

[0073] CSI Part 1 has a fixed pay load size (and can be decoded by the base station 102 without prior information) and contains the following: RI (if reported), CSI-RS resource index (CRI) (if reported) and CQI for the first codeword; number of non-zero wideband amplitude coefficients per layer for Type II CSI feedback on PUSCH. CSI Part 2 has a variable payload size that can be derived from the CSI parameters in CSI Part 1 and contains PMI and the CQI for the second codeword when RI > 4.

[0074] FIG. 11 illustrates an example 1100 of CSI reporting. The example 1100 illustrates the ordering of the aperiodic CSI reporting for CSI part 2 if the aperiodic trigger state indicated by DCI format 0 1 defines 3 report settings x, y, and z. The example 1100 is a partial CSI omission for Rel. 15 PUSCH-Based CSI.

[0075] As mentioned earlier, CSI reports are prioritized according to: 1) time-domain behavior and physical channel, where more dynamic reports are given precedence over less dynamic reports and PUSCH has precedence over PUCCH; 2) CSI content, where beam reports (i.e. Ll-RSRP reporting) has priority over regular CSI reports; 3) the serving cell to which the CSI corresponds (in case of carrier aggregation (CA) operation), CSI corresponding to the PCell has priority over CSI corresponding to Scells; the reportConfigID.

[0076] CSI reporting feedback is discussed herein that includes at least two CSI report segments or parts. The first CSI report segment or part reports based at least in part on channel measurement via TRS, and the second CSI report segment or part reports based at least in part on channel measurement via CSI-RS. These segments or parts may be implemented or reported in different manners (e.g., each reported in a separate CSI report, or both reported in a single CSI report) as discussed in more detail below.

[0077] In the following, unless otherwise stated, an NZP CSI-RS resource configured with a higher-layer parameter ‘trs-info’ is referred to as a tracking reference signal (TRS), and an NZP CSI- RS resource that is not configured with either higher-layer parameters ‘trs-info’ or ‘repetition’ is referred to as CSI-RS.

[0078] For the CSI reporting configuration, the UE 104 is configured with two NZP CSI-RS resources for channel measurement resource (CMR): a CSI-RS and a TRS.

[0079] In one or more implementations, the UE 104 is configured with two CSI reporting configurations. A first of the two CSI reporting configurations comprises a CSI-RS that is configured as a channel measurement resource. A second of the two CSI reporting configurations comprises a TRS that is configured as a Doppler measurement resource.

[0080] Additionally or alternatively, the UE 104 is configured with one CSI reporting configuration corresponding to CSI-RS and TRS. The CSI reporting configuration comprises two NZP CSI-RS resources for channel measurement, a first of the two NZP CSI-RS resources is a TRS, and a second of the two NZP CSI-RS resources is a CSI-RS. In one example, there are different CMR codepoints for both CSI-RS resource. The two NZP CSI-RS resources are indicated via two codepoints for channel measurement in the CSI reporting configuration, corresponding to an identification number of each of the two NZP CSI-RS resources, i.e., the two codepoints correspond to different fields of a same type, e.g., CMR1 and CMR2.

[0081] In another example, there are different fields for the two CSI-RS resources, CMR and DMR (Doppler). The two NZP CSI-RS resources are indicated via two codepoints in the CSI reporting configuration, where the CSI-RS is configured as a channel measurement resource, and the TRS is configured as a Doppler measurement resource, a delay measurement resource, or a combination thereof. In another example, configured CSI-RS/TRS pairs are represented by a single CMR codepoint. A plurality of CSI-RS and TRS pairs are higher-layer configured, and a single codepoint corresponding to a CSI-RS/TRS pair is indicated in the CSI reporting configuration.

[0082] Additionally or alternatively, the CSI reporting configuration that configures the UE 104 with receiving a TRS also configures the UE 104 with a CSI reporting configuration type that is similar to a CSI resource configuration type corresponding to the TRS. For example, the CSI reporting configuration type and the CSI resource configuration type are set to ‘periodic’, with a same periodicity.

[0083] Additionally or alternatively, a CSI reporting configuration that configures the UE 104 with receiving two NZP CSI-RS resources, where a first NZP CSI-RS resource is a CSI-RS and the second NZP CSI-RS resource is a TRS, also configures the UE 104 for two different report configuration types corresponding to two CSI reports. A first of the two report configuration types corresponds to the first NZP CSI-RS resource and a second of the two report configuration types corresponds to the second NZP CSI-RS resource. In one example, the first report configuration type is set to ‘periodic’, and the second report configuration type is set to ‘semi-persistent on PUSCH’.

[0084] Additionally or alternatively, the CSI reporting configuration configures the UE 104 to report the first of the two CSI reports over distinct slots compared with slots in which the second of the two CSI reports is reported. Accordingly the first CSI report is reported over one or more slots that are different than the one or more slots over which the second CSI report is reported. In one example, the CSI report corresponding to the second NZP CSI-RS resource, i.e., CSI-RS, is reported with a periodicity that is a multiple of a periodicity of the CSI report corresponding to the first NZP CSI-RS resource, i.e., TRS. A numerical example is provided as follows: the TRS-based CSI report would be configured to be reported every 20 slots, whereas the CSI-RS based CSI report would be configured to be reported every 20.x slots, where x=l,2,3,4, and x is a positive integer value that can be either fixed or higher- layer configured.

[0085] In one or more implementations, the UE is configured with reporting at least two CSI reports, where a first of the two CSI reports is based on the CSI measured via at least the NZP CSI- RS resource configured with ‘trs-info’. This report is also referred to as a TRS-based CSI report. [0086] In one or more implementations, the TRS-based CSI report includes at least one of spatial- domain basis indices, time-domain basis indices, or frequency-domain basis indices. For example, the TRS-based CSI report comprises at least one of: a selected subset of spatial-domain basis indices from a configured set of spatial-domain basis indices, a selected subset of frequency/ delay-domain basis indices from a configured set of frequency/delay-domain basis indices, or a selected subset of time/Doppler-domain basis indices from a configured set of time/Doppler-domain basis indices. E.g., the TRS-based CSI report comprises the selected subset of frequency/delay-domain basis indices and the selected subset of time/Doppler-domain basis indices.

[0087] Additionally or alternatively, the frequency/delay-domain basis indices and the selected subset of time/Doppler-domain basis indices are in a form of indices of a two-dimensional DFT matrix. A first of the two DFT dimensions corresponds to the frequency/delay-domain basis, and a second of the two DFT dimensions corresponds to the time/Doppler-domain basis. An identifier of a selected subset of indices is fed back in the CSI report, where each index of the selected subset of indices corresponds to a frequency/delay-domain basis index and a time/Doppler-domain basis index pair. The use of transformation matrices other than DFT is not precluded, e.g., Discrete Wavelet Transform (DWT) or Discrete Cosine Transform (DWT) may be used.

[0088] Additionally or alternatively, the TRS-based CSI report includes an indication of a number of dominant channel paths. The number of channel paths can be reported in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices, a size of a selected subset of time/Doppler-domain basis indices, or a size of a selected subset of indices corresponding to a pair of frequency/delay-domain basis indices and time/Doppler-domain basis indices.

[0089] Additionally or alternatively, amplitude coefficients are reported corresponding to each dominant channel path. Amplitudes are drawn from a pre-defined codebook and are configured with a maximum amplitude value. The TRS-based CSI report comprises a plurality of amplitude coefficients corresponding to each index of the selected subset of indices, i.e., corresponding to the dominant channel paths. For example, the amplitude coefficients are drawn from a codebook of values corresponding to 4 amplitude values, e.g., . By way of another example, the number of

the plurality of amplitude coefficients is less than or equal a higher-layer configured maximum value of the number of the plurality of amplitude coefficients. By way of another example, an indication of a strongest dominant channel path is fed back in the TRS-based CSI report, where the amplitude coefficient corresponding to the strongest dominant channel path is assigned a maximum amplitude level of the codebook of amplitude values

[0090] Additionally or alternatively, the TRS-based CSI report is reported on PUCCH and has a fixed payload size. In one example, zero-padding bits are added to the CSI report to ensure the CSI report on PUCCH has a fixed size, where the fixed size is higher-layer configured. Note that the zeropadding bits may be needed due to different number of dominant channel paths reported, and no zeropadding bits are needed if the reported number of dominant channel paths is equal to the maximum configured value.

[0091] In one or more implementations, unless otherwise stated, the UE is configured with reporting at least two CSI reports. A subset of the codebook parameters corresponding to the second CSI report (the CSI-RS based CSI report) depend on or are based on a subset of the CSI feedback parameters reported in the first CSI report (the TRS-based CSI report). Accordingly, the TRS-based CSI report is also referred to as paired with the CSI-RS based CSI report. Various implementations that describe the CSI type for such codebook design are discussed below. One or more elements or features from one or more of the described implementations may optionally be combined.

[0092] In one or more implementations, a rank indicator value reported in the CSI-RS based CSI report is constrained by a function of a number of frequency-domain basis indices, or alternatively a number of dominant channel paths, reported in the TRS-based CSI report. For example, the RI value cannot exceed the number of channel paths. By way of another example, the RI value is no more than the number of frequency-domain basis indices. By way of another example, the RI value is no more than double the number of frequency-domain basis indices.

[0093] Additionally or alternatively, an indicator field in a first of the two CSI reports implies whether a second of the two CSI reports is needed to be reported (e.g., when TRS is aperiodic). For example, the indicator field implies whether a set of selected spatial-domain basis dimensions, frequency/delay-domain basis dimensions, time/Doppler domain basis dimensions, or a combination thereof, should be measured/re-calculated.

[0094] Additionally or alternatively, In a third embodiment, a set of linear combination coefficients are based on CSI feedback from the TRS-based CSI report. The amplitude values, phase values or a combination thereof for the set of linear combination coefficients are reported in the CSI- RS based CSI report, and indices of the coefficients corresponding to the spatial-domain basis dimensions, frequency/delay-domain basis dimensions, time/Doppler domain basis dimensions, or a combination thereof are reported in the TRS-based CSI report. Additionally or alternatively, the number of selected indices of the coefficients corresponding to the spatial-domain basis dimensions, frequency/delay-domain basis dimensions, time/Doppler domain basis dimensions, or a combination thereof, are based on CSI feedback from the TRS-based CSI report.

[0095] Additionally or alternatively, a one precoder, i.e., codebook, is based on parameters that are fed back from both the TRS-based CSI report, and the CSI-RS based CSI report. Accordingly, one codebook comprises parameters from two CSI reports, the TRS-based and CSI-RS based reports.

[0096] Additionally or alternatively, the UE 104 feeds back one CSI report, which is partitioned into two parts. A first of the two CSI report parts corresponds to CSI measured using the TRS, and a second of the two CSI report parts corresponds to CSI measured using the CSI-RS. The first of the two CSI report parts may be fed back over PUCCH, and the second of the two CSI report parts may be fed back over PUSCH. In one example, the first of the two CSI report parts is associated with a CSI report priority value that is distinct from the CSI report priority value associated with the second of the two CSI report parts.

[0097] Additionally or alternatively, the CSI-RS and the TRS are quasi-colocated with respect to QCL type A and QCL type D, if applicable. Additionally or alternatively, the two CSI-RS resources are QCLed with respect to QCL type C and QCL type D, if applicable.

[0098] Additionally or alternatively, the NZP CSI-RS ports corresponding to the CSI-RS that is configured within the CSI reporting configuration are beamformed based on the received TRS. Precoding information for the CSI-RS is fed back as part of the TRS-based CSI report. The TRS- based beamforming of the NZP CSI-RS ports can be indicated to the UE 104 in terms of a QCL relationship that corresponds to a subset of a set of large-scale fading parameters, where the subset of the set of large-scale fading parameters depends on the beamforming scheme of the NZP CSI-RS ports. For example, the TRS-based beamforming of the NZP CSI-RS ports is in a form of a QCL indication of QCL Type-A, where at least one of the ‘Doppler shift’ and ‘Doppler spread’ characteristics are dropped from the QCL relationship. This example fits a scenario where the NZP CSI-RS ports are beamformed based on the reported Doppler information associated with the TRS, since the Doppler-based beamforming would alter the Doppler-based channel characteristics corresponding to the CSI-RS, compared with that of the TRS

[0099] In one or more implementations, the CSI-RS based CSI report is based on a Type-II codebook configuration, e.g., eType-II codebook or FeType-II codebook.

[0100] Additionally or alternatively, the size of the CSI-RS based CSI report is inferred from CSI fields reported in the TRS-based CSI report. For example, the TRS-based CSI report comprises a CSI field that corresponds to a number of bits representing a payload of the CSI-RS based CSI report. By way of another example, a payload of the CSI-RS based CSI report is inferred from the number of dominant channel paths reported in the TRS-based CSI report.

[0101] Additionally or alternatively, the TRS-based CSI report comprises at least time/Doppler- domain CSI and frequency/delay-domain CSI, whereas the CSI-RS based CSI report comprises at least spatial-domain CSI based on the at least time/Doppler-domain CSI and frequency/delay-domain CSI. For example, no more than one coefficient is fed back in the CSI-RS based CSI report for each NZP CSI-RS port of a set of NZP CSI-RS ports, where the set of NZP CSI-RS ports corresponds to ports of the CSI-RS that is configured in the CSI reporting configuration and is associated with the CSI-RS based CSI report, and where each coefficient comprises at least one of an amplitude value and a phase value.

[0102] The following includes additional information regarding antenna panel/port, quasicollocation, transmission configuration indication (TCI) state, and spatial relation.

[0103] In one or more implementations, the terms antenna, panel, and antenna panel are used interchangeably. An antenna panel may be a hardware that is used for transmitting and/or receiving radio signals at frequencies lower than 6GHz, e.g., frequency range 1 (FR1), or higher than 6GHz, e.g., frequency range 2 (FR2) or millimeter wave (mmWave). In some implementations, an antenna panel may comprise 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 transmission and/or reception of signals. The resulting radiation pattern may be called a beam, which may or may not be unimodal and may allow the device to amplify signals that are transmitted or received from spatial directions. [0104] Additionally or alternatively, an antenna panel may or may not be virtualized as an antenna port in the specifications. An antenna panel may be connected to a baseband processing module through a radio frequency (RF) chain for each of transmission (egress) and reception (ingress) directions. A capability of a device in terms of the number of antenna panels, their duplexing capabilities, their beamforming capabilities, and so on, may or may not be transparent to other devices. In some implementations, capability information may be communicated via signaling or, in some implementations, capability information may be provided to devices without a need for signaling. In the case that such information is available to other devices, it can be used for signaling or local decision making.

[0105] Additionally or alternatively, a device (e.g., UE 104, node) antenna panel may be a physical or logical antenna array comprising a set of antenna elements or antenna ports that share a common or a significant portion of an RF chain (e.g., in-phase/quadrature (I/Q) modulator, analog to digital (A/D) converter, local oscillator, phase shift network). The device antenna panel or “device panel” may be a logical entity with physical device antennas mapped to the logical entity. The mapping of physical device antennas to the logical entity may be up to device implementation. Communicating (receiving or transmitting) on at least a subset of antenna elements or antenna ports active for radiating energy (also referred to herein as active elements) of an antenna panel requires biasing or powering on of the RF chain which results in current drain 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 for radiating energy," as used herein, is not meant to be limited to a transmit function but also encompasses a receive function. Accordingly, an antenna element that is active for radiating energy may be coupled to a transmitter to transmit radio frequency energy or to a receiver to receive radio frequency energy, either simultaneously or sequentially, or may be coupled to a transceiver in general, for performing its intended functionality. Communicating on the active elements of an antenna panel enables generation of radiation patterns or beams.

[0106] Additionally or alternatively, depending on a device’s own implementation, a “device panel” can have at least one of the following functionalities as an operational role of Unit of antenna group to control its Tx beam independently, Unit of antenna group to control its transmission power independently, Unit of antenna group to control its transmission timing independently. The “device panel” may be transparent to the base station 102. For certain condition(s), the base station 102 or network can assume the mapping between device’s physical antennas to the logical entity “device panel” may not be changed. For example, the condition may include until the next update or report from device or comprise a duration of time over which the base station 102 assumes there will be no change to the mapping. A Device may report its capability with respect to the “device panel” to the base station or network. The device capability may include at least the number of “device panels”. In one implementation, the device may support UL transmission from one beam within a panel; with multiple panels, more than one beam (one beam per panel) may be used for UL transmission. In another implementation, more than one beam per panel may be supported/used for UL transmission.

[0107] Additionally or alternatively, an antenna port is defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed.

[0108] Two antenna ports are said to be quasi co-located (QCL) if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. The large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. Two antenna ports may be quasi-located with respect to a subset of the large-scale properties and different subset of large-scale properties may be indicated by a QCL Type. The QCL Type can indicate which channel properties are the same between the two reference signals (e.g., on the two antenna ports). Thus, the reference signals can be linked to each other with respect to what the UE can assume about their channel statistics or QCL properties. For example, qcl-Type may take one of the following values:

• 'QCL-TypeA': {Doppler shift, Doppler spread, average delay, delay spread}

• 'QCL-TypeB': {Doppler shift, Doppler spread}

• 'QCL-TypeC: {Doppler shift, average delay}

• 'QCL-TypeD': {Spatial Rx parameter}.

[0109] Spatial Rx parameters may include one or more of: angle of arrival (AoA,) Dominant AoA, average AoA, angular spread, Power Angular Spectrum (PAS) of AoA, average AoD (angle of departure), PAS of AoD, transmit/receive channel correlation, transmit/receive beamforming, spatial channel correlation etc. [0110] The QCL-TypeA, QCL-TypeB and QCL-TypeC may be applicable for all carrier frequencies, but the QCL-TypeD may be applicable only in higher carrier frequencies (e.g., mmWave, FR2 and beyond), where essentially the UE may not be able to perform omni-directional transmission, i.e. the UE 104 would need to form beams for directional transmission. A QCL-TypeD between two reference signals A and B, the reference signal A is considered to be spatially co-located with reference signal B and the UE may assume that the reference signals A and B can be received with the same spatial filter (e.g., with the same receive (RX) beamforming weights).

[0111] An “antenna port” according to one or more implementations may be a logical port that may correspond to a beam (resulting from beamforming) or may correspond to a physical antenna on a device. In some implementations, a physical antenna may map directly to a single antenna port, in which an antenna port corresponds to an actual physical antenna. Additionally or alternatively, a set or subset of physical antennas, or antenna set or antenna array or antenna sub-array, may be mapped to one or more antenna ports after applying complex weights, a cyclic delay, or both to the signal on each physical antenna. The physical antenna set may have antennas from a single module or panel or from multiple modules or panels. The weights may be fixed as in an antenna virtualization scheme, such as cyclic delay diversity (CDD). The procedure used to derive antenna ports from physical antennas may be specific to a device implementation and transparent to other devices.

[0112] In one or more implementations, a TCI-state (Transmission Configuration Indication) associated with a target transmission can indicate parameters for configuring a quasi-collocation relationship between the target transmission (e.g., target RS of demodulation reference signal (DM- RS) ports of the target transmission during a transmission occasion) and a source reference signal(s) (e.g., synchronization signal block (SSB)/CSI-RS/SRS) with respect to quasi co-location type parameter(s) indicated in the corresponding TCI state. The TCI describes which reference signals are used as QCL source, and what QCL properties can be derived from each reference signal. A device can receive a configuration of a plurality of transmission configuration indicator states for a serving cell for transmissions on the serving cell. In some of the embodiments described, a TCI state comprises at least one source RS to provide a reference (UE 104 assumption) for determining QCL and/or spatial filter.

[0113] Additionally or alternatively, a spatial relation information associated with a target transmission can 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 with the same spatial domain filter used for reception the reference RS (e.g., DL RS such as SSB/CSI-RS). In another example, the device may transmit the target transmission with the same spatial domain transmission filter used for the transmission of the reference RS (e.g., UL RS such as SRS). A device can receive a configuration of a plurality of spatial relation information configurations for a serving cell for transmissions on the serving cell.

[0114] Additionally or alternatively, a UL TCI state is provided if a device is configured with separate DL/UL TCI by RRC signaling. The UL TCI state may comprises a source reference signal which provides a reference for determining UL spatial domain transmission filter for the UL transmission (e.g., dynamic-grant/configured-grant based PUSCH, dedicated PUCCH resources) in a component carrier (CC) or across a set of configured CCs/BWPs.

[0115] Additionally or alternatively, a joint DL/UL TCI state is provided if the device is configured with joint DL/UL TCI by RRC signaling (e.g., configuration of joint TCI or separate DL/UL TCI is based on RRC signaling). The joint DL/UL TCI state refers to at least a common source reference RS used for determining both the DL QCL information and the UL spatial transmission filter. The source RS determined from the indicated joint (or common) TCI state provides QCL Type- D indication (e.g., for device-dedicated physical downlink control channel (PDCCH) / physical downlink shared channel (PDSCH)) and is used to determine UL spatial transmission filter (e.g., for UE-dedicated PUSCH/PUCCH) for a CC or across a set of configured CCs/BWPs. In one example, the UL spatial transmission filter is derived from the RS of DL QCL Type D in the joint TCI state. The spatial setting of the UL transmission may be according to the spatial relation with a reference to the source RS configured with qcl-Type set to 'typeD' in the joint TCI state.

[0116] FIG. 12 illustrates an example of a block diagram 1200 of a device 1202 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The device 1202 may be an example of a communication device (e.g., UE 104) as described herein. The device 1202 may support wireless communication and/or network signaling with one or more base stations 102, other UEs 104, network entities and devices, or any combination thereof. The device 1202 may include components for bi-directional communications including components for transmitting and receiving communications, such as a communications manager 1204, a processor 1206, a memory 1208, a receiver 1210, a transmitter 1212, and an I/O controller 1214. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses).

[0117] The communications manager 1204, the receiver 1210, the transmitter 1212, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the communications manager 1204, the receiver 1210, the transmitter 1212, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

[0118] In some implementations, the communications manager 1204, the receiver 1210, the transmitter 1212, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 1206 and the memory 1208 coupled with the processor 1206 may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor 1206, instructions stored in the memory 1208).

[0119] Additionally or alternatively, in some implementations, the communications manager 1204, the receiver 1210, the transmitter 1212, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by the processor 1206. If implemented in code executed by the processor 1206, the functions of the communications manager 1204, the receiver 1210, the transmitter 1212, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure).

[0120] In some implementations, the communications manager 1204 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 1210, the transmitter 1212, or both. For example, the communications manager 1204 may receive information from the receiver 1210, send information to the transmitter 1212, or be integrated in combination with the receiver 1210, the transmitter 1212, or both to receive information, transmit information, or perform various other operations as described herein. Although the communications manager 1204 is illustrated as a separate component, in some implementations, one or more functions described with reference to the communications manager 1204 may be supported by or performed by the processor 1206, the memory 1208, or any combination thereof. For example, the memory 1208 may store code, which may include instructions executable by the processor 1206 to cause the device 1202 to perform various aspects of the present disclosure as described herein, or the processor 1206 and the memory 1208 may be otherwise configured to perform or support such operations.

[0121] For example, the communications manager 1204 may support wireless communication and/or network signaling at a device (e.g., the device 1202, a communication device (e.g., a UE)) in accordance with examples as disclosed herein. The communications manager 1204 and/or other device components may be configured as or otherwise support an apparatus, such as a communication device (e.g., UE), including a transceiver; a processor coupled to the transceiver, the processor and the transceiver configured to cause the apparatus to: receive, from a network node, a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and transmit, to the network node over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

[0122] Additionally, the apparatus (such as a communication device (e.g., a UE)) includes any one or combination of: where the second CSI report segment includes channel state information that is based on the channel state information included in the first CSI report segment; where the CSI-RS corresponds to a NZP CSI-RS resource that is not configured with higher-layer parameters corresponding to either repetition or TRS information, and where the TRS corresponds to an NZP CSI-RS resource that is configured with a higher-layer parameter corresponding to tracking reference signal information; where the first CSI report segment and the second CSI report segment are two CSI reports or two parts of a same CSI report; where the apparatus receives two CSI reporting settings including a first CSI reporting setting that indicates a CSI-RS configuration, and a second CSI reporting setting that indicates a TRS configuration; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported with a first periodicity value, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported with a second periodicity value that is different from the first periodicity value; where the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource including an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource including an identification number of the TRS; where the CSI reporting configuration includes a CSI reporting configuration with a single codepoint, where multiple CSI-RS and TRS pairs are higher-layer configured, and the single codepoint comprises an identification number of a CSI-RS and TRS pair from the multiple CSI-RS and TRS pairs; where the CSI reporting configuration indicates that the TRS and the first CSI report segment are configured with a same time-domain behavior corresponding to TRS reception and the first CSI report segment feedback, and where the same time-domain behavior is set to one of a periodic or a semi-persistent behavior with a same periodicity value; where the first CSI report segment and the second CSI report segment are two CSI reports, and where the second CSI report segment follows a Type-II codebook configuration, and the first CSI report segment follows a distinct codebook configuration; where the first CSI report segment and the second CSI report segment are two parts of a same CSI report, and where the first CSI report segment is associated with a CSI report priority value that is distinct from a CSI report priority value associated with the second CSI report segment; where the first CSI report segment comprises at least one of: a selected subset of frequency/delay-domain basis indices; a selected subset of time/Doppler-domain basis indices; or a selected subset of indices corresponding to frequency/delay-domain basis and time/Doppler-domain basis pairs; where the first CSI report segment comprises an indication of a number of dominant channel paths, and where the number of dominant channel paths are in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices; a size of a selected subset of time/Doppler-domain basis indices; or a size of a selected subset of indices corresponding to a pair of frequency/delay-domain basis indices and time/Doppler-domain basis indices; where the first CSI report segment comprises amplitude coefficients corresponding to a subset of the dominant channel paths, and where values corresponding to the amplitude coefficients are drawn from a pre-defined codebook; where the first CSI report segment has a fixed payload size, and where zero-padding bits are added to the CSI report if the number of dominant channel paths reported in the CSI report segment is smaller than a configured maximum value of the number of dominant channel paths; where a rank indicator value is reported in the second CSI report segment, and where the rank indicator value is constrained by the number of dominant channel paths; where an indicator field reported in the first CSI report segment implies whether the second CSI report segment is reported; where a precoder is based on parameters that are fed back from both the first CSI report segment and the second CSI report segment; where a set of amplitude and phase values corresponding to linear combination coefficients of a codebook of a precoding matrix are reported in the second CSI report segment, and indices of the coefficients corresponding to at least one of spatial-domain basis dimensions, frequency/delay-domain basis dimensions, or time/Doppler domain basis dimensions are based on CSI feedback from the first CSI report segment; where no more than one coefficient corresponding to each NZP CSI-RS port of a set of NZP CSI-RS ports is reported in the second CSI report segment, and where the set of NZP CSI- RS ports corresponds to ports of the CSI-RS; where a size of the second report segments is inferred from fields of the first CSI report segment; where the CSI-RS and the TRS are quasi-colocated with respect to QCL type-D, if applicable, and one of QCL type- A, or QCL type-C; where the CSI-RS and the TRS are quasi-colocated with respect to at least QCL type- A, and where Doppler shift and Doppler spread characteristics are ignored with respect to the QCL type; where the first CSI report segment is reported over a physical uplink control channel; where the second CSI report segment is reported over a physical uplink shared channel. [0123] The communications manager 1204 and/or other device components may be configured as or otherwise support a means for wireless communication and/or network signaling at a communication device (e.g., UE), including receiving, from a network node, a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and transmitting, to the network node over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

[0124] Additionally, wireless communication and/or network signaling at the communication device (e.g., UE) includes any one or combination of: where the second CSI report segment includes channel state information that is based on the channel state information included in the first CSI report segment; where the CSI-RS corresponds to a NZP CSI-RS resource that is not configured with higher- layer parameters corresponding to either repetition or TRS information, and where the TRS corresponds to an NZP CSI-RS resource that is configured with a higher-layer parameter corresponding to tracking reference signal information; where the first CSI report segment and the second CSI report segment are two CSI reports or two parts of a same CSI report; further comprising receiving two CSI reporting settings including a first CSI reporting setting that indicates a CSI-RS configuration, and a second CSI reporting setting that indicates a TRS configuration; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported with a first periodicity value, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported with a second periodicity value that is different from the first periodicity value; where the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource including an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource including an identification number of the TRS; where the CSI reporting configuration includes a CSI reporting configuration with a single codepoint, where multiple CSI-RS and TRS pairs are higher-layer configured, and the single codepoint comprises an identification number of a CSI-RS and TRS pair from the multiple CSI-RS and TRS pairs; where the CSI reporting configuration indicates that the TRS and the first CSI report segment are configured with a same time-domain behavior corresponding to TRS reception and the first CSI report segment feedback, and where the same time-domain behavior is set to one of a periodic or a semi-persistent behavior with a same periodicity value; where the first CSI report segment and the second CSI report segment are two CSI reports, and where the second CSI report segment follows a Type-II codebook configuration, and the first CSI report segment follows a distinct codebook configuration; where the first CSI report segment and the second CSI report segment are two parts of a same CSI report, and where the first CSI report segment is associated with a CSI report priority value that is distinct from a CSI report priority value associated with the second CSI report segment; where the first CSI report segment comprises at least one of: a selected subset of frequency/delay-domain basis indices; a selected subset of time/Doppler-domain basis indices; or a selected subset of indices corresponding to frequency/delay-domain basis and time/Doppler-domain basis pairs; where the first CSI report segment comprises an indication of a number of dominant channel paths, and where the number of dominant channel paths are in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices; a size of a selected subset of time/Doppler-domain basis indices; or a size of a selected subset of indices corresponding to a pair of frequency/delay-domain basis indices and time/Doppler-domain basis indices; where the first CSI report segment comprises amplitude coefficients corresponding to a subset of the dominant channel paths, and where values corresponding to the amplitude coefficients are drawn from a predefined codebook; where the first CSI report segment has a fixed payload size, and where zeropadding bits are added to the CSI report if the number of dominant channel paths reported in the CSI report segment is smaller than a configured maximum value of the number of dominant channel paths; where a rank indicator value is reported in the second CSI report segment, and where the rank indicator value is constrained by the number of dominant channel paths; where an indicator field reported in the first CSI report segment implies whether the second CSI report segment is reported; where a precoder is based on parameters that are fed back from both the first CSI report segment and the second CSI report segment; where a set of amplitude and phase values corresponding to linear combination coefficients of a codebook of a precoding matrix are reported in the second CSI report segment, and indices of the coefficients corresponding to at least one of spatial-domain basis dimensions, frequency/delay-domain basis dimensions, or time/Doppler domain basis dimensions are based on CSI feedback from the first CSI report segment; where no more than one coefficient corresponding to each NZP CSI-RS port of a set of NZP CSI-RS ports is reported in the second CSI report segment, and where the set of NZP CSI-RS ports corresponds to ports of the CSI-RS; where a size of the second report segments is inferred from fields of the first CSI report segment; where the CSI-RS and the TRS are quasi-colocated with respect to QCL type-D, if applicable, and one of QCL type- A, or QCL type-C; where the CSI-RS and the TRS are quasi-colocated with respect to at least QCL type- A, and where Doppler shift and Doppler spread characteristics are ignored with respect to the QCL type; where the first CSI report segment is reported over a physical uplink control channel; where the second CSI report segment is reported over a physical uplink shared channel.

[0125] The processor 1206 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some implementations, the processor 1206 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 1206. The processor 1206 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1208) to cause the device 1202 to perform various functions of the present disclosure.

[0126] The memory 1208 may include random access memory (RAM) and read-only memory (ROM). The memory 1208 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1206 cause the device 1202 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 1206 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 1208 may include, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

[0127] The I/O controller 1214 may manage input and output signals for the device 1202. The I/O controller 1214 may also manage peripherals not integrated into the device 1202. In some implementations, the I/O controller 1214 may represent a physical connection or port to an external peripheral. In some implementations, the I/O controller 1214 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. In some implementations, the I/O controller 1214 may be implemented as part of a processor, such as the processor 1206. In some implementations, a user may interact with the device 1202 via the I/O controller 1214 or via hardware components controlled by the I/O controller 1214.

[0128] In some implementations, the device 1202 may include a single antenna 1216. However, in some other implementations, the device 1202 may have more than one antenna 1216, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The receiver 1210 and the transmitter 1212 may communicate bi-directionally, via the one or more antennas 1216, wired, or wireless links as described herein. For example, the receiver 1210 and the transmitter 1212 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1216 for transmission, and to demodulate packets received from the one or more antennas 1216.

[0129] FIG. 13 illustrates an example of a block diagram 1300 of a device 1302 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The device 1302 may be an example of a network node (e.g., a base station 102, such as a gNB), as described herein. The device 1302 may support wireless communication and/or network signaling with one or more base stations 102, other UEs 104, core network devices and functions (e.g., core network 106), or any combination thereof. The device 1302 may include components for bi-directional communications including components for transmitting and receiving communications, such as a communications manager 1304, a processor 1306, a memory 1308, a receiver 1310, a transmitter 1312, and an I/O controller 1314. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses).

[0130] The communications manager 1304, the receiver 1310, the transmitter 1312, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the communications manager 1304, the receiver 1310, the transmitter 1312, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

[0131] In some implementations, the communications manager 1304, the receiver 1310, the transmitter 1312, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 1306 and the memory 1308 coupled with the processor 1306 may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor 1306, instructions stored in the memory 1308).

[0132] Additionally or alternatively, in some implementations, the communications manager 1304, the receiver 1310, the transmitter 1312, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by the processor 1306. If implemented in code executed by the processor 1306, the functions of the communications manager 1304, the receiver 1310, the transmitter 1312, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure).

[0133] In some implementations, the communications manager 1304 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 1310, the transmitter 1312, or both. For example, the communications manager 1304 may receive information from the receiver 1310, send information to the transmitter 1312, or be integrated in combination with the receiver 1310, the transmitter 1312, or both to receive information, transmit information, or perform various other operations as described herein. Although the communications manager 1304 is illustrated as a separate component, in some implementations, one or more functions described with reference to the communications manager 1304 may be supported by or performed by the processor 1306, the memory 1308, or any combination thereof. For example, the memory 1308 may store code, which may include instructions executable by the processor 1306 to cause the device 1302 to perform various aspects of the present disclosure as described herein, or the processor 1306 and the memory 1308 may be otherwise configured to perform or support such operations.

[0134] For example, the communications manager 1304 may support wireless communication and/or network signaling at a device (e.g., the device 1302, a network node (such as a base station)) in accordance with examples as disclosed herein. The communications manager 1304 and/or other device components may be configured as or otherwise support an apparatus, such as a network node (e.g., base station), including a transceiver; a processor coupled to the transceiver, the processor and the transceiver configured to cause the apparatus to: transmit, to a communication device, a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and receive, from the communication device over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

[0135] Additionally, the apparatus (such as a network node (e.g., a base station)) includes any one or combination of: where the second CSI report segment includes channel state information that is based on the channel state information included in the first CSI report segment; where the CSI-RS corresponds to a NZP CSI-RS resource that is not configured with higher-layer parameters corresponding to either repetition or TRS information, and where the TRS corresponds to an NZP CSI-RS resource that is configured with a higher-layer parameter corresponding to tracking reference signal information; where the first CSI report segment and the second CSI report segment are two CSI reports or two parts of a same CSI report; where the apparatus transmits two CSI reporting settings including a first CSI reporting setting that indicates a CSI-RS configuration, and a second CSI reporting setting that indicates a TRS configuration; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported with a first periodicity value, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported with a second periodicity value that is different from the first periodicity value; where the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource including an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource including an identification number of the TRS; where the CSI reporting configuration includes a CSI reporting configuration with a single codepoint, where multiple CSI-RS and TRS pairs are higher-layer configured, and the single codepoint comprises an identification number of a CSI-RS and TRS pair from the multiple CSI-RS and TRS pairs; where the CSI reporting configuration indicates that the TRS and the first CSI report segment are configured with a same time-domain behavior corresponding to TRS reception and the first CSI report segment feedback, and where the same time-domain behavior is set to one of a periodic or a semi-persistent behavior with a same periodicity value; where the first CSI report segment and the second CSI report segment are two CSI reports, and where the second CSI report segment follows a Type-II codebook configuration, and the first CSI report segment follows a distinct codebook configuration; where the first CSI report segment and the second CSI report segment are two parts of a same CSI report, and where the first CSI report segment is associated with a CSI report priority value that is distinct from a CSI report priority value associated with the second CSI report segment; where the first CSI report segment comprises at least one of: a selected subset of frequency/delay-domain basis indices; a selected subset of time/Doppler-domain basis indices; or a selected subset of indices corresponding to frequency/delay-domain basis and time/Doppler-domain basis pairs; where the first CSI report segment comprises an indication of a number of dominant channel paths, and where the number of dominant channel paths are in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices; a size of a selected subset of time/Doppler-domain basis indices; or a size of a selected subset of indices corresponding to a pair of frequency/delay-domain basis indices and time/Doppler-domain basis indices; where the first CSI report segment comprises amplitude coefficients corresponding to a subset of the dominant channel paths, and where values corresponding to the amplitude coefficients are drawn from a pre-defined codebook; where the first CSI report segment has a fixed payload size, and where zero-padding bits are added to the CSI report if the number of dominant channel paths reported in the CSI report segment is smaller than a configured maximum value of the number of dominant channel paths; where a rank indicator value is reported in the second CSI report segment, and where the rank indicator value is constrained by the number of dominant channel paths; where an indicator field reported in the first CSI report segment implies whether the second CSI report segment is reported; where a precoder is based on parameters that are fed back from both the first CSI report segment and the second CSI report segment; where a set of amplitude and phase values corresponding to linear combination coefficients of a codebook of a precoding matrix are reported in the second CSI report segment, and indices of the coefficients corresponding to at least one of spatial-domain basis dimensions, frequency/delay-domain basis dimensions, or time/Doppler domain basis dimensions are based on CSI feedback from the first CSI report segment; where no more than one coefficient corresponding to each NZP CSI-RS port of a set of NZP CSI-RS ports is reported in the second CSI report segment, and where the set of NZP CSI- RS ports corresponds to ports of the CSI-RS; where a size of the second report segments is inferred from fields of the first CSI report segment; where the CSI-RS and the TRS are quasi-colocated with respect to QCL type-D, if applicable, and one of QCL type- A, or QCL type-C; where the CSI-RS and the TRS are quasi-colocated with respect to at least QCL type- A, and where Doppler shift and Doppler spread characteristics are ignored with respect to the QCL type; where the first CSI report segment is reported over a physical uplink control channel; where the second CSI report segment is reported over a physical uplink shared channel. [0136] The communications manager 1304 and/or other device components may be configured as or otherwise support a means for wireless communication and/or network signaling at a network node (e.g., a base station), including transmitting, to a communication device, a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and receiving, from the communication device over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

[0137] Additionally, wireless communication at the network node (e.g., base station) includes any one or combination of: where the second CSI report segment includes channel state information that is based on the channel state information included in the first CSI report segment; where the CSI-RS corresponds to a NZP CSI-RS resource that is not configured with higher-layer parameters corresponding to either repetition or TRS information, and where the TRS corresponds to an NZP CSI-RS resource that is configured with a higher-layer parameter corresponding to tracking reference signal information; where the first CSI report segment and the second CSI report segment are two CSI reports or two parts of a same CSI report; further comprising transmitting two CSI reporting settings including a first CSI reporting setting that indicates a CSI-RS configuration, and a second CSI reporting setting that indicates a TRS configuration; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots; where the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported with a first periodicity value, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported with a second periodicity value that is different from the first periodicity value; where the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource including an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource including an identification number of the TRS; where the CSI reporting configuration includes a CSI reporting configuration with a single codepoint, where multiple CSI-RS and TRS pairs are higher-layer configured, and the single codepoint comprises an identification number of a CSI-RS and TRS pair from the multiple CSI-RS and TRS pairs; where the CSI reporting configuration indicates that the TRS and the first CSI report segment are configured with a same time-domain behavior corresponding to TRS reception and the first CSI report segment feedback, and where the same time-domain behavior is set to one of a periodic or a semi-persistent behavior with a same periodicity value; where the first CSI report segment and the second CSI report segment are two CSI reports, and where the second CSI report segment follows a Type-II codebook configuration, and the first CSI report segment follows a distinct codebook configuration; where the first CSI report segment and the second CSI report segment are two parts of a same CSI report, and where the first CSI report segment is associated with a CSI report priority value that is distinct from a CSI report priority value associated with the second CSI report segment; where the first CSI report segment comprises at least one of: a selected subset of frequency/delay-domain basis indices; a selected subset of time/Doppler-domain basis indices; or a selected subset of indices corresponding to frequency/delay-domain basis and time/Doppler-domain basis pairs; where the first CSI report segment comprises an indication of a number of dominant channel paths, and where the number of dominant channel paths are in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices; a size of a selected subset of time/Doppler-domain basis indices; or a size of a selected subset of indices corresponding to a pair of frequency/delay-domain basis indices and time/Doppler-domain basis indices; where the first CSI report segment comprises amplitude coefficients corresponding to a subset of the dominant channel paths, and where values corresponding to the amplitude coefficients are drawn from a pre-defined codebook; where the first CSI report segment has a fixed payload size, and where zero-padding bits are added to the CSI report if the number of dominant channel paths reported in the CSI report segment is smaller than a configured maximum value of the number of dominant channel paths; where a rank indicator value is reported in the second CSI report segment, and where the rank indicator value is constrained by the number of dominant channel paths; where an indicator field reported in the first CSI report segment implies whether the second CSI report segment is reported; where a precoder is based on parameters that are fed back from both the first CSI report segment and the second CSI report segment; where a set of amplitude and phase values corresponding to linear combination coefficients of a codebook of a precoding matrix are reported in the second CSI report segment, and indices of the coefficients corresponding to at least one of spatial-domain basis dimensions, frequency/delay-domain basis dimensions, or time/Doppler domain basis dimensions are based on CSI feedback from the first CSI report segment; where no more than one coefficient corresponding to each NZP CSI-RS port of a set of NZP CSI-RS ports is reported in the second CSI report segment, and where the set of NZP CSI- RS ports corresponds to ports of the CSI-RS; where a size of the second report segments is inferred from fields of the first CSI report segment; where the CSI-RS and the TRS are quasi-colocated with respect to QCL type-D, if applicable, and one of QCL type- A, or QCL type-C; where the CSI-RS and the TRS are quasi-colocated with respect to at least QCL type- A, and where Doppler shift and Doppler spread characteristics are ignored with respect to the QCL type; where the first CSI report segment is reported over a physical uplink control channel; where the second CSI report segment is reported over a physical uplink shared channel.

[0138] The processor 1306 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some implementations, the processor 1306 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 1306. The processor 1306 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1308) to cause the device 1302 to perform various functions of the present disclosure.

[0139] The memory 1308 may include random access memory (RAM) and read-only memory (ROM). The memory 1308 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1306 cause the device 1302 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 1306 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 1308 may include, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

[0140] The I/O controller 1314 may manage input and output signals for the device 1302. The I/O controller 1314 may also manage peripherals not integrated into the device 1302. In some implementations, the I/O controller 1314 may represent a physical connection or port to an external peripheral. In some implementations, the I/O controller 1314 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. In some implementations, the I/O controller 1314 may be implemented as part of a processor, such as the processor 1306. In some implementations, a user may interact with the device 1302 via the I/O controller 1314 or via hardware components controlled by the I/O controller 1314.

[0141] In some implementations, the device 1302 may include a single antenna 1316. However, in some other implementations, the device 1302 may have more than one antenna 1316, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The receiver 1310 and the transmitter 1312 may communicate bi-directionally, via the one or more antennas 1316, wired, or wireless links as described herein. For example, the receiver 1310 and the transmitter 1312 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1316 for transmission, and to demodulate packets received from the one or more antennas 1316.

[0142] FIG. 14 illustrates a flowchart of a method 1400 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The operations of the method 1400 may be implemented and performed by a device or its components, such as a UE 104 as described with reference to FIGs. 1 through 13. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

[0143] At 1402, the method may include receiving, from a network node, a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS. The operations of 1402 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1402 may be performed by a device as described with reference to FIG. 1.

[0144] At 1404, the method may include transmitting, to the network node over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment. The operations of 1404 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1404 may be performed by a device as described with reference to FIG. 1.

[0145] FIG. 15 illustrates a flowchart of a method 1500 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The operations of the method 1500 may be implemented and performed by a device or its components, such as a UE 104 as described with reference to FIGs. 1 through 13. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

[0146] At 1502, the method may include receiving a first CSI reporting setting that indicates a CSI-RS configuration. The operations of 1502 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1502 may be performed by a device as described with reference to FIG. 1.

[0147] At 1504, the method may include receiving a second CSI reporting setting that indicates a TRS configuration. The operations of 1504 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1504 may be performed by a device as described with reference to FIG. 1. [0148] FIG. 16 illustrates a flowchart of a method 1600 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The operations of the method 1600 may be implemented and performed by a device or its components, such as a base station 102 as described with reference to FIGs. 1 through 13. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

[0149] At 1602, the method may include transmitting, to a communication device, a first signaling indicating at least one CSI reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a CSI-RS and a TRS, and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS. The operations of 1602 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1602 may be performed by a device as described with reference to FIG. 1.

[0150] At 1604, the method may include receiving, from the communication device over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment. The operations of 1604 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1604 may be performed by a device as described with reference to FIG. 1.

[0151] FIG. 17 illustrates a flowchart of a method 1700 that supports channel state information reporting using mixed reference signal types in accordance with aspects of the present disclosure. The operations of the method 1700 may be implemented and performed by a device or its components, such as a base station 102 as described with reference to FIGs. 1 through 13. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware. [0152] At 1702, the method may include transmitting a first CSI reporting setting that indicates a CSI-RS configuration. The operations of 1702 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1702 may be performed by a device as described with reference to FIG. 1.

[0153] At 1704, the method may include transmitting a second CSI reporting setting that indicates a TRS configuration. The operations of 1704 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1704 may be performed by a device as described with reference to FIG. 1.

[0154] It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined. The order in which the methods are described is not intended to be construed as a limitation, and any number or combination of the described method operations may be performed in any order to perform a method, or an alternate method.

[0155] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0156] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer- readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

[0157] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non- transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or specialpurpose processor.

[0158] Any connection may be properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer- readable media.

[0159] As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of’ or “one or more of’) indicates an inclusive list such 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). Similarly, a list of one or more of A, B, or C means A or B or C, or AB or AC orBC, or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.

[0160] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described example.

[0161] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

CLAIMS What is claimed is:

1. An apparatus, comprising: a transceiver; a processor coupled to the transceiver, the processor and the transceiver configured to cause the apparatus to: receive, from a network node, a first signaling indicating at least one channel state information (CSI) reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a channel state information reference signal (CSLRS) and a tracking reference signal (TRS), and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSLRS; and transmit, to the network node over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

2. The apparatus of claim 1, wherein the CSLRS corresponds to a non-zero power (NZP) CSLRS resource that is not configured with higher- layer parameters corresponding to either repetition or TRS information, and wherein the TRS corresponds to an NZP CSLRS resource that is configured with a higher-layer parameter corresponding to tracking reference signal information.

3. The apparatus of claim 1, wherein the first CSI report segment and the second CSI report segment are two CSI reports.

4. The apparatus of claim 1 , wherein the apparatus receives two CSI reporting settings including a first CSI reporting setting that indicates a CSLRS configuration, and a second CSI reporting setting that indicates a TRS configuration.

5. The apparatus of claim 1, wherein the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots.

6. The apparatus of claim 5, wherein the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported with a first periodicity value, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported with a second periodicity value that is different from the first periodicity value.

7. The apparatus of claim 1, wherein the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource comprising an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource comprising an identification number of the TRS.

8. The apparatus of claim 1, wherein the CSI reporting configuration indicates that the TRS and the first CSI report segment are configured with a same time-domain behavior corresponding to TRS reception and the first CSI report segment feedback, and wherein the same time-domain behavior is set to one of a periodic or a semi-persistent behavior with a same periodicity value.

9. The apparatus of claim 1, wherein the first CSI report segment and the second CSI report segment are two CSI reports, and wherein the second CSI report segment follows a Type-II codebook configuration, and the first CSI report segment follows a distinct codebook configuration.

10. The apparatus of claim 1 , wherein the first CSI report segment comprises an indication of a number of dominant channel paths, and wherein the number of dominant channel paths are in a form of an indicator of at least one of: a size of a selected subset of frequency/delay-domain basis indices; a size of a selected subset of time/Doppler-domain basis indices; or a size of a selected subset of indices corresponding to a pair of frequency/ delay- domain basis indices and time/Doppler-domain basis indices.

11. The apparatus of claim 10, wherein the first CSI report segment comprises amplitude coefficients corresponding to a subset of the dominant channel paths, and wherein values corresponding to the amplitude coefficients are drawn from a pre-defined codebook.

12. The apparatus of claim 10, wherein the first CSI report segment has a fixed payload size, and wherein zero-padding bits are added to the CSI report if the number of dominant channel paths reported in the CSI report segment is smaller than a configured maximum value of the number of dominant channel paths.

13. The apparatus of claim 1, wherein an indicator field reported in the first CSI report segment implies whether the second CSI report segment is reported.

14. The apparatus of claim 1 , wherein a precoder is based on parameters that are fed back from both the first CSI report segment and the second CSI report segment.

15. The apparatus of claim 1, wherein the CSI-RS and the TRS are quasi-colocated with respect to quasi co-location (QCL) type-D, if applicable, and one of QCL type- A, or QCL type-C.

16. An apparatus, comprising: a transceiver; a processor coupled to the transceiver, the processor and the transceiver configured to cause the apparatus to: transmit, to a communication device, a first signaling indicating at least one channel state information (CSI) reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a channel state information reference signal (CSI-RS) and a tracking reference signal (TRS), and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and receive, from the communication device over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.

17. The apparatus of claim 16, wherein the apparatus transmits two CSI reporting settings including a first CSI reporting setting that indicates a CSI-RS configuration, and a second CSI reporting setting that indicates a TRS configuration.

18. The apparatus of claim 16, wherein the configuration information corresponding to the first CSI report segment indicates the first CSI report segment is to be reported over a first one or more slots, and the configuration information corresponding to the second CSI report segment indicates the second CSI report segment is to be reported over a second one or more slots that are different than the first one or more slots.

19. The apparatus of claim 16, wherein the at least one CSI reporting setting includes two codepoints that correspond to channel measurement, each of the two codepoints comprises an identification number of the CSI-RS or the TRS, a first codepoint of the two codepoints corresponds to a channel measurement resource comprising an identification number of the CSI-RS, and a second codepoint of the two codepoints corresponds to at least one of a Doppler measurement resource or a delay measurement resource comprising an identification number of the TRS.

20. A method, comprising: receiving, from a network node, a first signaling indicating at least one channel state information (CSI) reporting setting including configuration information corresponding to reference signals used for channel measurement and configuration information corresponding to CSI reporting feedback, the reference signals used for channel measurement including at least a channel state information reference signal (CSI-RS) and a tracking reference signal (TRS), and the configuration information corresponding to CSI reporting feedback indicating two CSI report segments, a first CSI report segment being based at least in part on channel measurement via TRS and a second CSI report segment being based at least in part on channel measurement via CSI-RS; and transmitting, to the network node over at least one physical uplink channel, CSI feedback corresponding to at least one of the first CSI report segment and the second CSI report segment.