Patent Description:
In some examples, a wireless multiple-access communication system may include a number of base stations (BSs), which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipment (UEs).

NR is an example of an emerging telecommunication standard.

These improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. 3GPP proposals R1-<NUM> and R1-<NUM> relate to CSI reporting and discuses in sec. <NUM> timing for A-CSI based on A-CSI-RS/A-CSI-IM, wherein it is proposed that a UE may ignore the scheduling DCI for CSI reporting on PUSCH, if the gap from the end of PDCCH containing the CSI request to the start of the corresponding PUSCH transmission is less than (Z + I) OFDM symbols, when the A-CSI report is multiplexed with UL-SCH (cf. proposal <NUM>). 3GPP proposal R1-<NUM> and R1-<NUM> relates to CSI reporting and discusses in sec. <NUM> about CSI latency requirements, wherein it is proposed that, when an A-CSI trigger state triggers multiple CSI reports for CSI latency requirement, the CSI re-ports are assumed to be calculated simultaneously on different CSI processes (cf. proposal <NUM>. <CIT> being prior art under Art. <NUM>(<NUM>) EPC relates to methods, apparatuses and systems for transmission of a CSI report, wherein a WTRU may receive an aperiodic CSI reporting request on a PDCCH and the WTRU may determine a time gap between a last symbol of the PDCCH of which the aperiodic CSI reporting request is received and a first uplink symbol of a designated uplink channel for transmission of a corresponding aperiodic CSI report.

The problem of the present invention is solved by the subject matter of the independent claims. After considering this discussion, and particularly after reading the section entitled "Detailed Description" one will understand how the features of this disclosure provide advantages that include improved channel state information, such as scheduling for aperiodic feedback associated with cross-carriers, in a wireless network.

Certain aspects provide a method for wireless communication. The method generally includes receiving on a first component carrier (CC) signaling indicating an aperiodic channel state information (CSI) report request for a plurality of CCs; determining a CSI processing time requirement based on subcarrier spacing (SCS) numerologies of the CCs; determining whether to report or drop a CSI reporting for each of the CCs based on the CSI processing time requirement; monitoring CSI reference signal (CSI-RS) transmissions on the CCs; and reporting CSI feedback based on CSI-RS measurements of the CSI-RS transmissions.

Aspects of the present disclosure also provide various apparatuses, means, and computer program products corresponding to the methods and operations described above.

Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for cross-carrier scheduling for aperiodic CSI feedback. CSI may refer to known channel properties of a communication link, for example, an estimation of long-term and/or short-term channel conditions. CSI is typically estimated at the receiver (e.g., a user equipment), quantized, and fed back to the transmitter (e.g., a base station) to enable the transmitter to adapt transmissions based on the current channel conditions. For example, a base station may trigger a user equipment to report aperiodic CSI associated with multiple component carriers (CCs). The user equipment may determine when to monitor reference signals associated with the CCs and report the feedback to the base station. Various scheduling schemes for cross-carrier CSI feedback and a technique for determining a CSI processing time requirement are described herein, for example, as depicted in <FIG>.

For example, the wireless communication network <NUM> may be an NR or <NUM> network.

In certain aspects, CSI feedback may be triggered via cross-carrier scheduling to report the channel properties of component-carrier. For example, the BS 110a may trigger the UE 120a to report aperiodic channel state information associated with component carriers (CCs). Various scheduling schemes for cross-carrier CSI feedback and a technique for determining a CSI processing time requirement are described herein, for example, as depicted in <FIG>.

As illustrated in <FIG>, the wireless network <NUM> may include a number of base stations (BSs) <NUM> and other network entities. A BS may be a station that communicates with user equipment (UEs). Each BS <NUM> may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a coverage area of a Node B (NB) and/or a Node B subsystem serving this coverage area, depending on the context in which the term is used. In NR systems, the term "cell" and next generation NodeB (gNB), new radio base station (NR BS), <NUM> NB, access point (AP), or transmission reception point (TRP) may be interchangeable. In some examples, the base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in wireless communication network <NUM> through various types of backhaul interfaces, such as a direct physical connection, a wireless connection, a virtual network, or the like using any suitable transport network.

In some examples, access to the air interface may be scheduled, wherein a. A scheduling entity (e.g., a base station) allocates resources for communication among some or all devices and equipment within its service area or cell.

<FIG> illustrates example components of BS <NUM> and UE <NUM> (as depicted in <FIG>), which may be used to implement aspects of the present disclosure. For example, antennas <NUM>, processors <NUM>, <NUM>, <NUM>, and/or controller/processor <NUM> of the UE <NUM> and/or antennas <NUM>, processors <NUM>, <NUM>, <NUM>, and/or controller/processor <NUM> of the BS <NUM> may be used to perform the various techniques and methods described herein, such as the operations described herein and illustrated in <FIG>, <FIG>, and <FIG>.

Each slot may include a variable number of symbol periods (e.g., <NUM>, <NUM>, or <NUM> symbols) depending on the subcarrier spacing. A mini-slot is a subslot structure (e.g., <NUM>, <NUM>, or <NUM> symbols).

In wireless communications, CSI may refer to known channel properties of a communication link. The CSI may represent the combined effects of, for example, scattering, fading, and power decay with distance between a transmitter and receiver. Channel estimation may be performed to determine the effects of, for example, scattering, fading, and power decay on the channel. CSI may be used to adapt transmissions based on the current channel conditions, which is useful for achieving reliable communication, in particular, with high data rates in multi-antenna systems. CSI is typically estimated at the receiver, quantized, and fed back to the transmitter.

The CSI feedback may be reported according to periodic or semi-persistent schedules or on an aperiodic basis triggered, for example, by downlink signaling from a base station. For aperiodic-CSI (A-CSI) feedback, a base station may request a CSI feedback report for multiple carriers (e.g., component carriers) or cross-carriers assigned to a UE.

In cases where the component carriers have different subcarrier spacings (SCSs), the timing for such resources may not be aligned or have different transmission time intervals for slots and/or OFDM symbols. This poses an issue with determining the scheduling when the CSI feedback report is received on a first component carrier having a different SCS configuration than the component carrier in which is scheduled to measure CSI feedback. For example in certain communication systems (e.g., NR), a component carrier having an SCS numerology of µ = <NUM> for a normal cyclic prefix may have <NUM> slot per subframe and <NUM> OFDM symbols per slot; whereas a component carrier having an SCS numerology of µ = <NUM> for a normal cyclic prefix may have <NUM> slots per subframe and <NUM> OFDM symbols per slot. In other words, the transmission time for an OFDM symbol of the component carrier having an SCS numerology of µ = <NUM> is half that of an OFDM symbol of the component carrier having an SCS numerology of µ = <NUM>. As such, a UE may determine the scheduling for cross-carrier feedback in order to provide full channel information to the RAN, especially in cases where the A-CSI feedback is triggered on a component carrier having a different SCS than that of the component scheduled for A-CSI feedback.

Certain aspects of the present disclosure provide techniques and apparatus for determining cross-carrier scheduling of A-CSI feedback. The cross-carrier scheduling of A-CSI feedback described herein enables the BS to more efficiently acquire full channel information across multiple component carriers or a different component carrier from which received the A-CSI report request, especially in situations where the component carriers have different SCSs.

<FIG> is a flow diagram illustrating example operations <NUM> that may be performed, for example, by a base station (e.g., base station <NUM>), for scheduling A-CSI feedback associated with multiple component carriers, in accordance with certain aspects of the present disclosure.

Operations <NUM> may begin, at <NUM>, where the BS signals, to a UE, a request for an aperiodic channel state information (CSI) report associated with a plurality of component carriers (CCs). At <NUM>, the BS transmits CSI reference signals (CSI-RSs) on the CCs according to a schedule. At <NUM>, the BS receives, from a UE, CSI feedback associated with the CCs.

<FIG> is a flow diagram illustrating example operations <NUM> that may be performed, for example, by a UE (e.g., UE <NUM>), for determining scheduling of A-CSI feedback, in accordance with certain aspects of the present disclosure.

Operations <NUM> may begin, at <NUM>, where the UE receives on a first component carrier (CC) signaling indicating an aperiodic channel state information (CSI) report request for a plurality of CCs. At <NUM>, the UE determines schedules for at least CSI reference signal (CSI-RS) transmissions on the CCs based on the received signaling. At <NUM>, the UE monitors CSI-RS transmissions on the CCs according to the determined schedules. At <NUM>, the UE reports CSI feedback based on CSI-RS measurements of the CSI-RS transmissions, for example, to a base station.

<FIG> is a timing diagram illustrating an example of cross-carrier scheduling for A-CSI feedback, in accordance with certain aspects of the present disclosure. As shown, a UE is configured to communicate using at least two component carriers CC1 (SCS = <NUM>) and CC2 (SCS = <NUM>). On CC1, the UE receives (e.g., at <NUM>), from a base station, downlink control signaling <NUM> (e.g., DCI message), which indicates a request to provide a cross-carrier A-CSI report to the base station, via a PDCCH. Based on the downlink control signaling <NUM>, the UE determines that the A-CSI-RS <NUM> is scheduled on CC1 within slot (n + x) <NUM>, where slot n (<NUM>) corresponds to the slot in which the UE received the last symbol of the downlink control signaling <NUM> and x corresponds to a slot offset. The slot offset x may be pre-programmed on the UE or set by the RAN via higher layer parameters (e.g., radio resource control signaling). The UE also determines that the A-CSI-RS <NUM> is scheduled on CC2 within slot (n' + x') by translating the slot n (<NUM>) to a compatible reference slot n' (<NUM>) for the CC2 as further described herein. The slot offset x' for CC2 may also be pre-programmed on the UE or set by the RAN via higher layer parameters (e.g., radio resource control signaling), and the slot offset x' may have a different value or the same value as x. In other words, the UE may be configured with the slot offsets or different slot offsets depending on the SCS configuration. In certain aspects, the UE may determine the schedules for CSI-RS transmissions on CCs having the same SCS and/or different SCSs.

In certain aspects, slot n' may be defined as the next slot not overlapping with the last symbol of the control signaling received on a CC, in cases where the SCS for the scheduled feedback is greater than the SCS of the CC on which the control signaling triggering the feedback is received. In other words, if the SCS for the scheduled feedback is greater than the SCS of the CC on which the control signaling is received, slot n' may be defined as the earliest slot later than the last symbol of the control signaling received on the CC. For example, <FIG> is a timing diagram illustrating an example of cross-carrier scheduling for A-CSI feedback where the SCSs of CC2 (e.g., SCS = <NUM>) and CC3 (e.g., SCS = <NUM>) are greater than the SCS of CC1 (e.g., SCS = <NUM>) on which the control signaling is received, in accordance with certain aspects of the present disclosure. As shown, the UE receives (e.g., at <NUM>) downlink control signaling <NUM> (e.g., a DCI message), which indicates a request to provide a cross-carrier A-CSI report to the base station, via a PDCCH. Slot n (<NUM>) for CC1 is identified as the slot having the last symbol of the downlink control signaling <NUM> indicating the request for the CSI feedback. The UE may identify that the SCSs of CC2 and CC3 are greater than the SCS of CC1. Based on this identification, the UE may determine slot n' (<NUM>) for CC2 by determining the next slot of CC2 that does not overlap with last symbol of the downlink control signaling <NUM>. Also depicted is the slot n' (<NUM>) for CC3, which is the next slot of CC3 that does not overlap with the last symbol of the downlink control signaling <NUM>. Using the schedule for n', the UE may determine the scheduling for the CSI-RS transmissions on CC2 and CC3 as described herein with respect to <FIG>.

In certain aspects, slot n' may be defined as the slot that aligns with the slot of the CC on which the control signaling is received, in cases where the SCS for the scheduled feedback is less than or equal to the SCS of the CC on which the control signaling is received. For example, <FIG> is a timing diagram illustrating an example of cross-carrier scheduling for A-CSI feedback where the SCSs of CC2 (e.g., SCS = <NUM>) is less than the SCS of CC1 (e.g., SCS = <NUM>) on which the control signaling is received, in accordance with certain aspects of the present disclosure. As shown, the UE receives (e.g., at <NUM>) downlink control signaling <NUM> (e.g., a DCI message), which indicates a request to provide a cross-carrier A-CSI report to the base station, via a PDCCH. Slot n (<NUM>) for CC1 is identified as the slot having the last symbol of the downlink control signaling <NUM> indicating the request for the CSI feedback. The UE may identify that the SCS of CC2 is less than or equal to the SCS of CC1 on which the control signaling is received. Based on this identification, the UE may determine slot n' (<NUM>) for CC2 by determining the slot of CC2 that aligns at the aligned boundary <NUM> with slot n (<NUM>) of CC1. The UE may determine the scheduling for the CSI-RS transmissions on CC2 based on slot n' as described herein with respect to <FIG>.

In certain aspects, slot n' may be defined as the slot that overlaps with the slot of the CC on which the control signaling is received, in cases where the UE is not configured for A-CSI feedback and the SCS for the scheduled feedback is less than the SCS of the CC on which the control signaling triggering the CSI feedback is received. In other words, slot n' may be defined as the slot that overlaps with the slot of the CC that receives the control signaling, where the UE is not expected to receive an A-CSI feedback configuration and the SCS of CCs for A-CSI-RS feedback measurements are less than SCS of DCI. For example, <FIG> is a timing diagram illustrating an example of cross-carrier scheduling for A-CSI feedback where the SCSs of CC2 (e.g., SCS = <NUM>) is less than the SCS of CC1 (e.g., SCS = <NUM>) on which the control signaling is received, in accordance with certain aspects of the present disclosure. As shown, the UE receives downlink control signaling <NUM> (e.g., DCI message), which indicates a request to provide a cross-carrier A-CSI report to the base station, via a PDCCH. Slot n (<NUM>) for CC1 is identified as the slot having the last symbol of the downlink control signaling <NUM> indicating the request for the CSI feedback. The UE may determine slot n' (<NUM>) for CC2 by determining the slot of CC2 that overlaps with slot n (<NUM>) of CC1. The UE may determine the scheduling for the CSI-RS transmissions on CC2 based on slot n' as described herein with respect to <FIG>.

In certain aspects, slot n' may be defined as the slot that overlaps with the slot of the CC on which the control signaling is received regardless of the SCS. For example, <FIG> is a timing diagram illustrating an example of cross-carrier scheduling for A-CSI feedback, in accordance with certain aspects of the present disclosure. As shown, a UE is configured to communicate using three component carriers CC1 (SCS = <NUM>), CC2 (SCS = <NUM>), and CC3 (SCS = <NUM>). The UE receives downlink control signaling <NUM> (e.g., a DCI message), which indicates a request to provide a cross-carrier A-CSI report to the base station, via a PDCCH on CC2. Slot n (<NUM>) for CC2 is identified as the slot having the last symbol of the downlink control signaling <NUM> indicating the request for the CSI feedback. The UE may determine slots n' (<NUM> and <NUM>) for CC1 and CC3 by determining the slots of CC1 and CC3 that overlap with slot n (<NUM>) of CC2. The UE may determine the scheduling for the CSI-RS transmissions on CC1 and CC3 based on slot n' as described herein with respect to <FIG>.

In certain aspects, slon n' may be defined as the slot that is aligned with the last symbol of the slot of the CC on which the control signaling is received, in cases where the SCS for the scheduled feedback is greater than the SCS of the CC on which the control signaling is received. For example, <FIG> is a timing diagram illustrating an example of cross-carrier scheduling for A-CSI feedback where the SCSs of CC2 (e.g., SCS = <NUM>) and CC3 (e.g., SCS = <NUM>) are greater than the SCS of CC1 (e.g., SCS = <NUM>) on which the control signaling is received, in accordance with certain aspects of the present disclosure. As shown, a UE is configured to communicate using three component carriers CC1 (SCS = <NUM>), CC2 (SCS = <NUM>), and CC3 (SCS = <NUM>). The UE receives downlink control signaling <NUM> (e.g., a DCI message), which indicates a request to provide a cross-carrier A-CSI report to the base station, via a PDCCH on CC1. Slot n (<NUM>) for CC1 is identified as the slot having the last symbol of the downlink control signaling <NUM> indicating the request for the CSI feedback. The UE may determine slots n' (<NUM> and <NUM>) for CC2 and CC3 by determining the slots of CC2 and CC3 that align with the last symbol of slot n (<NUM>) of CC1. In other words, slot n' may be determined as being the slot having its last symbol that aligns with the last symbol of slot n. The UE may determine the scheduling for the CSI-RS transmissions on CC2 and CC3 based on slot n' as described herein with respect to <FIG>.

In certain aspects, operations <NUM> and <NUM> may also apply to CSI interference measurements (CSI-IM) resources. For example, the UE may determine schedules for CSI-IM resources and/or CSI-RS transmissions as described herein with respect to <FIG>. The BS may transmit CSI-RSs on the CCs according to the various schedules for slots n and n' as described herein with respect to <FIG>.

In certain aspects, the UE may receive control signaling from the BS indicating offset values (e.g., values for slot offset x or x' as shown in <FIG>) for determining the schedules for the CSI-RS transmissions as described herein. The UE may determine schedules for the CSI-RS transmissions based on the indicated offset values as described herein with respect to <FIG>.

The UE determines a CSI processing time requirement based on subcarrier spacing (SCS) numerologies of the CCs (e.g., an SCS numerology of µ = <NUM> may correspond to an SCS of <NUM>, an SCS numerology of µ = <NUM> may correspond to an SCS of <NUM>, etc.). The CSI processing time requirement may be used in determining various parameters during the monitoring and reporting of CSI feedback. Such a parameter may be the CSI computational delay which sets the minimum time for measuring the CSI-RS transmission and determining the CSI report before reporting the CSI feedback to the base station. Another example of a parameter derived from the CSI processing time requirement is the time offset of the CSI reference resource or preparation time, which is derived from Z' for a given CSI latency and/or numerology as further described herein.

<FIG> is a flow diagram illustrating example operations <NUM> that may be performed, for example, by a UE (e.g., UE <NUM>), for determining the CSI processing time requirement, in accordance with certain aspects of the present disclosure.

Operations <NUM> may begin, at <NUM>, where the UE receives on a first component carrier (CC) signaling indicating an aperiodic channel state information (CSI) report request for a plurality of component carriers (CCs). At <NUM>, the UE determines a CSI processing time requirement based on subcarrier spacing (SCS) numerologies of the CCs. At <NUM>, the UE determines whether to report or drop a CSI reporting for each of the CCs based on the CSI processing time requirement. At <NUM>, the UE monitors CSI reference signal (CSI-RS) transmissions on the CCs. At <NUM>, the UE reports CSI feedback based on CSI-RS measurements of the CSI-RS transmissions.

<FIG> is a block diagram illustrating an example of cross-carrier scheduling for A-CSI feedback in which the CSI processing time requirement is determined, in accordance with certain aspects of the present disclosure. As shown, the UE is configured to communicate on two component carriers, CC1 and CC2. The UE receives downlink control signaling <NUM> (e.g., a DCI message), which indicates a request to provide a cross-carrier A-CSI report to the base station, via a PDCCH on CC1. As described herein, the UE may determine the scheduling for the CSI-RS transmissions <NUM> and <NUM> as indicated by the downlink control signaling <NUM>. Suppose, for example, that the SCS of CC2 is greater than the SCS of CC1, slot n' may be defined as the next slot not overlapping with the last symbol of the control signaling received on a CC1 as described herein with respect to <FIG>.

At <NUM>, the UE determines the processing time requirement <NUM> based on SCSs of the CCs scheduled for CSI feedback reporting. The UE identifies a minimum SCS among SCSs for at least one of one or more physical downlink control channels (PDCCHs), one or more physical uplink shared channels (PUSCHs), or one or more CSI-RS transmissions, as provided by the following expression: <MAT> where µn,PDCCH corresponds to the subcarrier spacing of the PDCCH with which the control signalling (e.g., a DCI message) was transmitted to trigger the A-CSI, µn,PUSCH corresponds to the subcarrier spacing of the PUSCH with which the CSI report is to be transmitted, and µ<NUM>. n,CSI-RS corresponds to the minimum subcarrier spacing of the aperiodic CSI-RS triggered by the control signalling (e.g., the DCI message).

The minimum SCS µ is used, according to the claimed invention, to determine the processing time requirement <NUM>, or, according to other examples, the preparation time <NUM>, and/or the computational delay <NUM>. The processing time requirement <NUM> may include the preparation time <NUM> and the computational delay <NUM>. The preparation time <NUM> may correspond to the time between the last symbol of the DCI message to the first symbol of the PUSCH which transmits the CSI feedback report. The computational delay <NUM> may correspond to the time between the last symbol of the CSI-RS and the first symbol of the PUSCH which transmits the CSI feedback report.

The processing time requirement <NUM>, the preparation time <NUM>, or the computational delay <NUM> may depend on a minimum SCS selected among SCSs. For instance, Table <NUM> provides computational delays for SCS numerologies <NUM> through <NUM>. (Z,Z') may be defined as (Z<NUM>, Z'<NUM>) in certain instances where the CSI report requested is associated with wideband frequency-granularity, otherwise (Z,Z') may be defined as the (Z<NUM>, Z'<NUM>). It should be appreciated that the values of (Z<NUM>, Z'<NUM>) and (Z<NUM>, Z'<NUM>. ) in Table <NUM> are merely examples, and other suitable values of (Z<NUM>, Z'<NUM>) and (Z<NUM>, Z'<NUM>. ) may be used. For instance, values for (Z<NUM>, Z'<NUM>) and (Z<NUM>, Z'<NUM>. ) may also depend on low latency or high latency requirements for the CSI feedback or the capabilities of the UE (e.g., normal or advanced).

The SCS µ of Table <NUM> may correspond to the SCS µ given by Eq. (<NUM>). The SCS µ of Table <NUM> may also correspond to the min(µDL, µUL) where the µDL corresponds to the subcarrier spacing of the PDCCH with which the DCI was transmitted and µUL corresponds to the subcarrier spacing of the PUSCH with which the CSI report is to be transmitted. In certain aspects, other suitable tables may be provided for determining the processing time requirement and/or the preparation time <NUM> based on SCS µ.

Referring to <FIG>, the UE uses the processing time requirement to determine whether to report or drop a CSI reporting for each of the CCs scheduled for CSI feedback. The UE may determine the computational delay <NUM> based on the identified minimum SCS (µ), and the UE may measure the feedback based on the received CSI-RS transmissions <NUM> and <NUM>. The UE may report the CSI feedback <NUM> not earlier than the computational delay <NUM> via the PUSCH.

<FIG> illustrates a communications device <NUM> (e.g., BS <NUM> or UE <NUM>) that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in <FIG> and <FIG>. The transceiver <NUM> is configured to transmit and receive signals for the communications device <NUM> via an antenna <NUM>, such as the various signal described herein.

The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium/memory <NUM> via a bus <NUM>. In certain aspects, the computer-readable medium/memory <NUM> is configured to store instructions that when executed by processor <NUM>, cause the processor <NUM> to perform the operations illustrated in <FIG>, <FIG>, and <FIG>, or other operations for performing the various techniques discussed herein.

In certain aspects, the processing system <NUM> further includes a transmitting/receiving component <NUM> for performing the operations illustrated in <FIG>, <FIG>, and <FIG>. Additionally, the processing system <NUM> includes a determining component <NUM> for performing the operations illustrated in <FIG>, <FIG>, and <FIG>. Additionally, the processing system <NUM> includes a monitoring component <NUM> for performing the operations illustrated in <FIG>, <FIG>, and <FIG>. Additionally, the processing system <NUM> includes a reporting component <NUM> for performing the operations illustrated in <FIG>, <FIG>, and <FIG>. The transmitting/receiving component <NUM>, determining component <NUM>, monitoring component <NUM>, and reporting component <NUM> may be coupled to the processor <NUM> via bus <NUM>. In certain aspects, the transmitting/receiving component <NUM>, determining component <NUM>, monitoring component <NUM>, and reporting component <NUM> may be hardware circuits. In certain aspects, the transmitting/receiving component <NUM>, determining component <NUM>, monitoring component <NUM>, and reporting component <NUM> may be software components that are executed and run on processor <NUM>.

In the case of a user equipment <NUM> (see <FIG>), a user interface (e.g., keypad, display, mouse, joystick, etc.) may also be connected to the bus.

For example, such a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein, for example, instructions for performing the operations described herein and illustrated in <FIG>, <FIG>, and <FIG>.

Claim 1:
A method (<NUM>) of wireless communication, comprising:
receiving (<NUM>) on a first component carrier, CC, signaling indicating an aperiodic channel state information, CSI, report request for a plurality of CCs;
determining (<NUM>) a CSI processing time requirement based on subcarrier spacing, SCS, numerologies of the CCs;
determining (<NUM>) whether to report or drop a CSI reporting for each of the CCs based on the CSI processing time requirement;
monitoring (<NUM>) CSI reference signal, CSI-RS, transmissions on the CCs; and
reporting (<NUM>) CSI feedback based on CSI-RS measurements of the CSI-RS transmissions,
wherein determining the processing time requirement comprises:
identifying a minimum SCS among SCSs for the physical downlink control channel, PDCCH, with which the signalling was received indicating the aperiodic CSI report request, the physical uplink shared channel, PUSCH, with which the CSI feedback is to be reported, and the CSI-RS transmissions; and
determining the processing time requirement based on the identified minimum SCS.