WO2021027042A1

WO2021027042A1 - User-equipment (ue) capability signaling for codebook combinations

Info

Publication number: WO2021027042A1
Application number: PCT/CN2019/109823
Authority: WO
Inventors: Chenxi HAO; Lei Xiao; Yu Zhang; Chao Wei; Peter Gaal; Wanshi Chen; Parisa CHERAGHI; Hao Xu
Original assignee: Qualcomm Incorporated
Priority date: 2019-08-14
Filing date: 2019-10-04
Publication date: 2021-02-18
Also published as: WO2021026798A1

Abstract

Certain aspects provide a method for wireless communication. The method generally includes receiving an indication of a capability of a user-equipment (UE) with respect to channel state information (CSI) -reporting, the capability of the UE being specific to a codebook combination to be processed simultaneously by the UE, determining one or more parameters to be configured for the CSI-reporting based on the capability of the UE, and configuring the UE to perform the CSI-reporting using the determined one or more parameters.

Description

USER-EQUIPMENT (UE) CAPABILITY SIGNALING FOR CODEBOOK COMBINATIONS

BACKGROUND

Cross-reference to related applications

This application claims priority to PCT Application No. PCT/CN2019/100518, filed August 14, 2019, which is assigned to the assignee hereof and hereby expressly incorporated by reference herein in its entirety as if fully set forth below and for all applicable purposes.

Field of the Disclosure

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for capability signaling.

Description of Related Art

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc. ) . Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few.

These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL) . To these ends, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in NR and LTE technology. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.

SUMMARY

The systems, methods, and devices of the disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of this disclosure as expressed by the claims which follow, some features will now be discussed briefly.

Certain aspects provide a method for wireless communication. The method generally includes determining a capability of the UE with respect to channel state information (CSI) -reporting, the capability of the UE being specific to a codebook combination to be processed simultaneously by the UE, transmitting an indication of the capability of the UE, and receiving a configuration of one or more parameters for the CSI-reporting in accordance with the indication of the capability.

Certain aspects provide a method for wireless communication. The method generally includes receiving an indication of a capability of a user-equipment (UE) with respect to channel state information (CSI) -reporting, the capability of the UE being received for each of at least two codebooks to be processed by the UE, determining one or more parameters to be configured for the CSI-reporting based on the capability of the UE, and configuring the UE to perform the CSI-reporting using the determined one or more parameters, wherein the one or more parameters are determined by assuming that the capability of the UE with respect to a first codebook of the at least two codebooks is the same as a second codebook of the at least two codebooks, if the first codebook and the second codebook are to be configured for simultaneous processing by the UE, or configuring the UE to perform the CSI-reporting comprises avoiding configuring the UE to process the first codebook simultaneously with the second codebook.

Certain aspects provide a method for wireless communication. The method generally includes determining a capability of the UE with respect to channel state information (CSI) -reporting, the capability of the UE being received for each of at least two codebooks to be processed by the UE, transmitting an indication of the capability of the UE to a network entity, and receiving a configuration of one or more parameters for the CSI-reporting in accordance with the capability of the UE, wherein the indication of the capability is determined by expecting that the one or more parameters are to be configured by the network assuming that the capability of the UE with respect to a first codebook of the at least two codebooks is the same as a second codebook of the at least two codebooks, if the first codebook and the second codebook are to be configured for simultaneous processing by the UE, or the network entity is to avoid configuring the UE to process the first codebook simultaneously with the second codebook.

Certain aspects provide a method for wireless communication. The method generally includes receiving an indication of a capability of a user-equipment (UE) with respect to channel state information (CSI) -reporting, determining one or more parameters associated with each of one or more CSI reports based on the capability of the UE, wherein the one or more parameters are determined based on a combination of codebooks or CSIs to be processed simultaneously by the UE, generating a CSI request for the one or more CSI reports, and transmitting the CSI request to the UE to perform the CSI-reporting using the determined one or more parameters.

Certain aspects provide a method for wireless communication. The method generally includes determining a capability of the UE with respect to channel state information (CSI) -reporting, transmitting an indication of the capability of the UE, receiving a CSI request for one or more CSI reports, the CSI request comprising a configuration of one or more parameters associated with each of the one or more CSI reports, and determining the one or more CSI reports by determining the one or more parameters are in accordance with the capability reported by the UE, wherein determining the one or more parameters is based on a combination of codebooks or CSIs to be processed simultaneously by the UE.

Aspects of the present disclosure provide means for, apparatus, processors, and computer-readable mediums for performing the methods described herein.

To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the manner in which the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects.

FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.

FIG. 2 is a block diagram conceptually illustrating a design of an example a base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.

FIG. 3 illustrates a number of processing cycles associated with various codebooks.

FIG. 4 is a flow diagram illustrating example operations for wireless communication by a BS, in accordance with certain aspects of the present disclosure.

FIG. 5 is a flow diagram illustrating example operations for wireless communication by a UE, in accordance with certain aspects of the present disclosure.

FIGs. 6A, 6B, 6C, and 6D illustrate UE capability information for various codebook combinations, in accordance with certain aspects of the present disclosure.

FIG. 7 illustrates UE capability parameters for various codebooks and a weight associated with each codebook, in accordance with certain aspects of the present disclosure.

FIGs. 8A and 8B illustrate example processing weights for various codebook types and example configurations of resources to be used for channel state information (CSI) -reporting, in accordance with certain aspects of the present disclosure.

FIG. 9 is a flow diagram illustrating example operations for wireless communication by a BS, in accordance with certain aspects of the present disclosure.

FIG. 10 is a flow diagram illustrating example operations for wireless communication by a UE, in accordance with certain aspects of the present disclosure.

FIG. 11 illustrates a communications device that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.

FIG. 12 illustrates a communications device that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.

FIGs. 13A, 13B, and 13C illustrate example processing weights for various codebook types, maximum weighted sum of resources and ports, and example configurations of resources to be used for CSI-reporting, in accordance with certain aspects of the present disclosure.

FIG. 14 is a flow diagram illustrating example operations for wireless communication by a BS, in accordance with certain aspects of the present disclosure.

FIG. 15 is a flow diagram illustrating example operations for wireless communication by a UE, in accordance with certain aspects of the present disclosure.

FIGs. 16A-16F are tables illustrating example reported capabilities and triggered CSI-reports, in accordance with certain aspects of the present disclosure.

FIGs. 17A-17B are tables illustrating example reported capabilities and triggered CSI-report, in accordance with certain aspects of the present disclosure.

FIGs. 18A-18D are tables illustrating example reported capabilities and corresponding triggered reports, in accordance with certain aspects of the present disclosure.

To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized on other aspects without specific recitation.

DETAILED DESCRIPTION

Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for user-equipment (UE) capability signaling for codebook combination.

The following description provides examples of UE capability signaling in communication systems, and is not limiting of the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, etc. A frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, a 5G NR RAT network may be deployed.

FIG. 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be an NR system (e.g., a 5G NR network) .

As illustrated in FIG. 1, the wireless communication network 100 may include a number of base stations (BSs) 110a-z (each also individually referred to herein as BS 110 or collectively as BSs 110) and other network entities. A BS 110 may provide communication coverage for a particular geographic area, sometimes referred to as a “cell” , which may be stationary or may move according to the location of a mobile BS 110. In some examples, the BSs 110 may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces (e.g., a direct physical connection, a wireless connection, a virtual network, or the like) using any suitable transport network. In the example shown in FIG. 1, the

BSs

110a, 110b and 110c may be macro BSs for the

macro cells

102a, 102b and 102c, respectively. The BS 110x may be a pico BS for a pico cell 102x. The BSs 110y and 110z may be femto BSs for the

femto cells

102y and 102z, respectively. A BS may support one or multiple cells. The BSs 110 communicate with user equipment (UEs) 120a-y (each also individually referred to herein as UE 120 or collectively as UEs 120) in the wireless communication network 100. The UEs 120 (e.g., 120x, 120y, etc. ) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.

According to certain aspects, the BSs 110 and UEs 120 may be configured for channel state information (CSI) reporting and configuration. As shown in FIG. 1, the BS 110a includes a CSI manager configured to configure parameters for CSI reporting, in accordance with aspects of the present disclosure. As shown in FIG. 1, the UE 120a includes a CSI manager configured to indicate UE capabilities for CSI-reporting, in accordance with aspects of the present disclosure.

Wireless communication network 100 may also include relay stations (e.g., relay station 110r) , also referred to as relays or the like, that receive a transmission of data and/or other information from an upstream station (e.g., a BS 110a or a UE 120r) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE 120 or a BS 110) , or that relays transmissions between UEs 120, to facilitate communication between devices.

A network controller 130 may couple to a set of BSs 110 and provide coordination and control for these BSs 110. The network controller 130 may communicate with the BSs 110 via a backhaul. The BSs 110 may also communicate with one another (e.g., directly or indirectly) via wireless or wireline backhaul.

FIG. 2 illustrates example components of BS 110a and UE 120a (e.g., in the wireless communication network 100 of FIG. 1) , which may be used to implement aspects of the present disclosure.

At the BS 110a, a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240. The control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid ARQ indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , etc. The data may be for the physical downlink shared channel (PDSCH) , etc. The processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols, such as for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and cell-specific reference signal (CRS) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 232a-232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from modulators 232a-232t may be transmitted via the antennas 234a-234t, respectively.

At the UE 120a, the antennas 252a-252r may receive the downlink signals from the BS 110a and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all the demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink 260, and provide decoded control information to a controller/processor 280.

On the uplink, at UE 120a, a transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from a data source 262 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 280. The transmit processor 264 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) . The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the demodulators in transceivers 254a-254r (e.g., for SC-FDM, etc. ) , and transmitted to the BS 110a. At the BS 110a, the uplink signals from the UE 120a may be received by the antennas 234, processed by the modulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120a. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.

The

memories

242 and 282 may store data and program codes for BS 110a and UE 120a, respectively. A scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.

The controller/processor 280 and/or other processors and modules at the UE 120a may perform or direct the execution of processes for the techniques described herein. For example, as shown in FIG. 2, the controller/processor 240 of the BS 110a has an CSI manager that may be configured for configuring parameter for CSI-reporting, according to aspects described herein. As shown in FIG. 2, the controller/processor 280 of the UE 120a has an CSI manager 241 that may be configured for indicating UE capabilities for CSI-reporting, according to aspects described herein. Although shown at the Controller/Processor, other components of the UE 120a and BS 110a may be used performing the operations described herein.

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 using the pilots, such as CSI reference signals (CSI-RS) , may be performed to determine these effects 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.

A network (e.g., a base station 110) , may configure UEs for CSI reporting. For example, the BS 110 may configure the UE 120 with a CSI report configuration (sometimes referred to as a ‘CSI report setting’ ) or with multiple CSI report configurations. The CSI report configuration may be provided to the UE via higher layer signaling, such as radio resource control (RRC) signaling. The CSI report configurations may be associated with CSI-RS resources used for channel measurement (CM) , interference measurement (IM) , or both. The CSI report configuration configures CSI-RS resources (sometimes referred to as the ‘CSI-RS resource setting’ ) for measurement. The CSI-RS resources provide the UE with the configuration of CSI-RS ports, or CSI-RS port groups, mapped to time and frequency resources (e.g., resource elements (REs) ) . CSI-RS resources can be zero power (ZP) or non-zero power (NZP) resources. At least one NZP CSI-RS resource may be configured for CM.

The CSI report configuration may also configure the CSI parameters (sometimes referred to as quantities) to be reported using codebooks. Three example types of codebooks include Type I single panel, Type I multi-panel, and Type II single panel. Regardless of which codebook is used, the CSI report may include a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) , and/or a rank indicator (RI) . The structure of the PMI may vary based on the codebook. For the Type I single panel codebook, the PMI may include a W1 matrix (e.g., subset of beams) and a W2 matrix (e.g., phase for cross polarization combination and beam selection) . For the Type I multi-panel codebook, compared to type I single panel codebook, the PMI further comprises a phase for cross panel combination. For the Type II single panel codebook, the PMI is a linear combination of beams; it has a subset of orthogonal beams to be used for linear combination and has per layer, per polarization, amplitude and phase for each beam. For the PMI of any type, there can be wideband (WB) PMI and/or subband (SB) PMI as configured.

The CSI report configuration may configure the UE for aperiodic, periodic, or semi-persistent CSI reporting. The CSI report configuration may configure the time and frequency resources used by the UE to report CSI. For periodic CSI, the UE may be configured with periodic CSI-RS resources. Periodic CSI and semi-persistent CSI report on physical uplink control channel (PUCCH) may be triggered via RRC or a medium access control (MAC) control element (CE) . For aperiodic and semi-persistent CSI on the physical uplink shared channel (PUSCH) , the BS may signal the UE a CSI report trigger indicating for the UE to send a CSI report for one or more CSI-RS resources, or configuring the CSI-RS report trigger state. The CSI report trigger for aperiodic CSI and semi-persistent CSI on PUSCH may be provided via downlink control information (DCI) . The CSI-RS trigger may be signaling indicating to the UE that CSI-RS will be transmitted for the CSI-RS resource.

The UE may report the CSI feedback based on the CSI report configuration and the CSI report trigger. For example, the UE may measure the channel associated with CSI for the triggered CSI-RS resources. Based on the measurements, the UE may select one or more preferred CSI-RS resources or select a CSI-RS resource comprising one or more port groups. The UE may report the CSI feedback for each of the CSI-RS resources and/or port groups.

Example Capability Signaling for Codebook Combination

A UE 120 may indicate its capability for channel state information (CSI) reporting, enabling the BS 110 (e.g., gNB) to configure resources for the CSI report. For example, for each codebook type, such as type I single panel, type I multi-panel, release-15 type II, and release-15 type II port selection, the UE may signal parameters indicating a maximum number of supported transmit ports per resource (e.g., maxNumTxPortsPerResource parameter) , a maximum number of supported resources per band (e.g., maxNumberResourcesPerBand parameter) , and a total number of transmit ports per band (e.g., totalNumberTxPortsPerBand parameter) .

The UE may signal the maximum number of simultaneous CSI reports (regardless of codebook type) supported across all CCs, signal the maximum number of simultaneous non-zero power (NZP) channel CSI-reference signal (CSI-RS) and CSI-interference measurement (IM) resources (regardless of codebook type) across all CCs, and signal the maximum number of simultaneous CSI-RS ports (regardless of codebook type) across all CCs. For instance, the UE may signal a maximum number of resources per CC as N=8, and signal N ₁=8 (≤N) resources for a type I single panel codebook and N ₂=6 (≤N) resources for release-15 type II codebook. In this case, the gNB may trigger 1 type I report with 8 resources, or trigger 3 type II reports each with 2 resources.

However, the processing complexity associated with different codebook types may be unequal. For example, the processing complexity of a type I single panel may be about the same as type I multi-panel, but less than the release-15 type II port selection codebook. The processing complexity of the release-15 type II port selection codebook may be about the same as release-15 type II but less than release-16 type II. The unequal processing complexity of codebook types may result in underreported capability by the UE since the UE may plan for the worst case scenario with respect to the CSI-reporting configuration by the BS 110.

FIG. 3 illustrates a number of processing cycles associated with various codebooks. As illustrated, a single processing cycle may be required by a single NZP CSI-RS resource associated with a type I single panel codebook, 2 processing cycles may be required by a single NZP CSI-RS resource associated with release-15 type II codebook, and three processing cycles may be required by a single NZP CSI-RS resource associated with a release-16 type II code book.

If A indicates the UE capability for a type I codebook, and B indicates UE capability for a type II codebook, then the UE may target supporting any combination (a, b) such that a is less than A and b is less than B. As one example, the UE may have the capability to process eight resources in total. Moreover, the actual maximum resources that UE is capable of handling for type I may be 8 resources, and the maximum resources for release-15 type II the UE is capable of handling may be 7. However, if the UE reports 8 maximum resources for type I and 7 maximum resources for release-15 type II, the BS 110 may configure 1 resource for Type I codebook and 7 resources for type II codebook, exceeding the total available cycles at the UE (e.g., 7 resources for release-15 type II x 2 cycles per resource = 14 cycles, leaving no cycles available for the 1 resource for the type I codebook) .

Therefore, the UE may instead report the maximum resources for release-15 type II as being 6. As result, the BS 110 may only configure 6 resources for release-15 type II codebook and 2 resources for the type I codebook, resulting in the maximum number of 8 resources, and 14 cycles which does not exceed to the total number of available cycles at the UE. As another example, assuming the UE can process 8 resources in total, and the maximum number of resources for type I, release-15 type II, and release-16 type II the UE is capable of handling is 8, 7, 4, respectively. In this case, the UE may report a maximum number of resources for type I, release-15 type II, and release-16 type II, as 8, 2, 2, respectively.

In other words, if x denotes the resources for release-15 type II codebook, and y denotes the resources for release-16 type II, and 8-x-y (e.g., 8 being the maximum number of resources across all codebooks) are the resources available for the type I codebook, then the processing cycles may be represented by the expression 2x+3y+ (8-x-y) which must be equal to or less than 14 (e.g., assuming 14 available cycles) , which is equivalent to x+2y being less than or equal to 6. Therefore, the capability of the UE may be underutilized. Certain aspects of the present disclosure are generally directed to UE capability signalling that is specific to a codebook combination, as described in more detail herein.

FIG. 4 is a flow diagram illustrating example operations 400 for wireless communication, in accordance with certain aspects of the present disclosure. The operations 400 may be performed, for example, by a BS (e.g., such as the BS 110a in the wireless communication network 100) .

Operations 400 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 240 of FIG. 2) . Further, the transmission and reception of signals by the BS in operations 400 may be enabled, for example, by one or more antennas (e.g., antennas 234 of FIG. 2) . In certain aspects, the transmission and/or reception of signals by the BS may be implemented via a bus interface of one or more processors (e.g., controller/processor 240) obtaining and/or outputting signals.

The operations 400 may begin, at block 405, by receiving an indication of a capability of a UE with respect to CSI-reporting, the capability of the UE being specific to a codebook combination to be processed simultaneously by the UE. For instance, the indicated capability of the UE comprises at least one of a maximum number of resources for the CSI-reporting for a particular codebook type, a maximum number of ports per resource for the CSI-reporting for the particular codebook type, or a maximum number of total ports across the resources for the CSI-reporting for the particular codebook type. At block 410, the BS may determine one or more parameters to be configured for the CSI-reporting based on the capability of the UE, and at block 415, configure the UE to perform the CSI-reporting using the determined one or more parameters. In certain aspects, the codebook combination may be one of a plurality of codebook combinations, and receiving the indication of the capability of the UE may include receiving separate (e.g., different) capability information for each of the plurality of codebook combinations.

In certain aspects, the indicated capability of the UE may include at least one codebook specific capability associated with each codebook of the plurality of codebooks and a processing weight associated with the codebook. In this case, the determination of the one or more parameters to be configured may include calculating the capability of the UE specific to the codebook combination based on the codebook specific capability of UE associated with each codebook of a plurality of codebooks, and the processing weight associated with the corresponding codebook. The indicated capability of the UE may include an indication of at least one cap associated with a sum of weighted codebook capabilities such that a product of one of the one or more parameters associated with each of the plurality of codebooks and the processing weight associated with the corresponding codebook, summed for the plurality of codebooks, may be less than the indicated cap.

The codebook capability may include at least one of a maximum number of resources to be configured for a particular codebook type, a maximum number of ports per resource to be configured for the particular codebook type, and a maximum number of total ports to be configured across the resources for the particular codebook type. Thus, the indicated at least one cap may include a first cap of a sum of weighted resources such that the product of a number of resources to be configured for each of the plurality of codebooks and the processing weight of the codebook, summed for the plurality of codebooks, is less than the indicated first cap, and a second cap of a sum of weighted ports such that the product of a number of ports to be configured for each of the plurality of codebooks and the processing weight of the codebook, summed for the plurality of codebooks, is less than the indicated second cap. The BS may also receive an indication of a maximum total number of resources for the CSI-reporting such that the resources configured for the plurality of codebooks is less than the indicated maximum total number of resources, and a maximum total number of ports for the CSI-reporting such that the ports configured for the plurality of codebooks is less than the indicated maximum total number of ports, as described in more detail herein.

FIG. 5 is a flow diagram illustrating example operations 500 for wireless communication, in accordance with certain aspects of the present disclosure. The operations 500 may be performed, for example, by UE (e.g., such as a UE 120a in the wireless communication network 100) .

The operations 500 may be complimentary operations by the UE to the operations 500 performed by the BS. Operations 500 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 280 of FIG. 2) . Further, the transmission and reception of signals by the UE in operations 500 may be enabled, for example, by one or more antennas (e.g., antennas 252 of FIG. 2) . In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor 280) obtaining and/or outputting signals.

The operations 500 may begin, at block 505, by determining a capability of the UE with respect to CSI-reporting, the capability of the UE being specific to a codebook combination to be processed simultaneously by the UE. At block 510, the BS 110 transmits the indication of the capability of the UE, and at block 515, receives a configuration of one or more parameters for the CSI-reporting in accordance with the indication of the capability.

In other words, a UE may report CSI processing capability per codebook combination and per codebook. For example, the UE may report up to N codebook combinations. Each codebook combination may include a combination of up to M codebooks, and the UE may report capability for up to M codebooks. For each codebook, the UE may report the maximum number of transmit ports per resource, the maximum number of resources per band, and the total number of transmit ports per band. The indicated capability of the UE may differ for different codebook combinations with respect to the maximum number of resources, maximum number of ports per resource, and maximum total ports or codebook types. In some cases, the UE may also report the value of N and M as an additional capability, N being the maximum number of different codebook combinations and M being the maximum number of codebooks per combination, as described herein.

FIGs. 6A, 6B, 6C, and 6D illustrate UE capability information for various codebook combinations, in accordance with certain aspects of the present disclosure. Each of the UE capabilities for the various codebook combinations may be explicitly signalled to the BS 110 by the UE 120. As illustrated, for each of the combinations, the UE may indicate a maximum number of resources, maximum number of ports per resource, maximum number of total ports, for each codebook of the combination. The BS 110 may then determine the UE capability for a specific codebook combination to be configured, allowing the BS 110 to configure resources and ports to be used for CSI reporting for the codebook combination. For explicit signaling, the codebook combination signaling may be implemented for a case where the codebook combination includes the combination of codebooks from different bands.

FIG. 7 illustrates UE capability parameters for various codebooks and a weight associated with each codebook, in accordance with certain aspects of the present disclosure. In other words, the UE may report a processing weight for a codebook configuration, the processing weight x _i being specific to a tuple of codebook type, maximum number of resources (K _i) of a particular codebook i, maximum number of ports per resource (P _i) of a particular codebook i, and maximum number of total ports across all resources (N _i) of a particular codebook i, as illustrated in FIG. 7. In certain aspects, the UE may also report a variable y indicating a cap of the sum of weighted resources, variable z indicating a cap of the sum of the weighted ports, and K indicating the maximum total number of resources across all codebooks of the codebook combination. Based on the indicated capabilities of the UE, the BS 110 may determine the resources and ports to be configured that is within the capability of the UE for a particular codebook combination to be configured, such that for the codebook combination being configured, the following expressions hold true.

k _i≤K _i, p _i≤P _i, k _i×p _i≤N _i

where k _i is the configured number of resources for the codebook i, p _i is the configured number of ports per resource for the codebook i, x _i is the processing weight of the codebook i, M is the number of codebooks of the configured codebook combination, and N is the maximum number of total ports across all resources and for all codebooks of the configured codebook combination.

For a certain codebook type, there may be multiple tuples of Ki, Pi and Ni, and each tuple may have a particular x _i. As an example, codebook1 may be a type I codebook with K _i=8, P _i=4, N _i=32, and x _i=1, and codebook2 may be a type I codebook with K _i=2, P _i=32, N _i=32, and x _i=1.5. The value of the processing weight x _i may be selected from {1, 1.5, 2, 2.5, 3, 3.5} , in certain aspects. For release-16 type II codebook, the UE may further report capability of supporting a maximum number of spatial beams (L) which may be selected from

values

2, 4, and 6, and capability of supporting maximum precoding matrix indicator (PMI) granularity (R) which may be 1 or 2 (e.g., meaning the number of PMIs per channel quality information (CQI) subband, or the ratio between a CQI subband size and a PMI subband size) . The processing weight x _i value may be different by L and R. For instance, codebook1 may be a release-16 type II codebook with K _i=1, P _i=32, N _i=32, L=4, R=1, x _i=2.5} , and codebook2 may be a release-15 type II codebook with K _i=1, P _i=32, N _i=32, L=6, R=1, x _i=3.5, and codebook3 may be a release-16 type II codebook with K _i=1, P _i=32, N _i=32, L=4, R=2, x _i=3.

FIGs. 8A and 8B illustrate example processing weights for various codebook types and example configurations of resources to be used for CSI-reporting, in accordance with certain aspects of the present disclosure. As illustrated in FIG. 8A, the UE may indicate a weight (x ₀) of 1 for type I single panel codebook, a weight (x ₁) of 2 for release-15 type II codebook, and a weight (x ₂) of 3 for release-16 type II codebook.

As illustrated in FIG. 8B, various resources may be configured for the codebooks, denoted by variables k ₀, k ₁, and k ₂. For example, the UE may indicate a cap of the sum of weight resources (y) as being equal to 14 and a maximum of 8 total resources to be triggered simultaneously per CC. Therefore, the BS 110 may determine resources that the UE is capable of processing for the CSI-reporting via the capability information from the UE, as described herein, and assign resources for the CSI-reporting. For example, when CSI-reporting for only a type I single panel codebook is being configured, k ₀ may be equal to 8 resources for the single panel, k ₁ may be equal to zero resources for the release-15 type II codebook, and k ₂ may be equal to zero resources for the release-16 type II codebook. As another example, when a combination of a type I single panel codebook, release-15 type II codebook, and a release-16 type II codebook are being configured for simultaneous processing by the UE, k ₀ may be equal to 4 resources (e.g., weight resources of 4) for the single panel, k ₁ may be equal to 2 resources (e.g., weighted resources of 4) for the release-15 type II codebook, and k ₂ may be equal to 2 resources (e.g., weighted resources of 6) for the release-16 type II codebook. Therefore, the sum of the weighted resources may be 14, which is equal to the cap of the sum of weight resources (y) , as described herein. In addition, the UE may further report the sum of weight resources (z) as being equal to 256. This capability further implies a constraint on the number of ports per resource for each of the valid configuration, as described in more detail herein.

FIGs. 13A, 13B, and 13C illustrate example processing weights for various codebook types, maximum weighted sum of resources and ports, and example configurations of resources to be used for CSI-reporting, in accordance with certain aspects of the present disclosure. As illustrated in FIG. 13A, the UE may indicate a weight (x ₀) of 1 for type I single panel codebook, a weight (x ₁) of 2 for release-15 type II codebook, and a weight (x ₂) of 3 for release-16 type II codebook. The UE may also indicate maximum number of resources, maximum number of ports per source, and maximum total ports, for the various codebooks types, as illustrated. As illustrated in FIG. 13B, the UE may also indicate a maximum weighted sum of resources (y) of 14, as well as a maximum weighted sum of ports (z) of 256.

As illustrated in FIG. 13C, various resources and ports may be configured for the codebooks, denoted by resource variables k ₀, k ₁, and k ₂ and port per resource variables p ₀, p ₁, and p ₂. The BS 110 may determine resources and ports that the UE is capable of processing for the CSI-reporting via the capability information from the UE, as described herein, and assign resources and ports for the CSI-reporting. For example, when CSI- reporting for only a type I single panel codebook is being configured, k ₀ may be equal to 8 resources for the single panel, k ₁ may be equal to zero resources for the release-15 type II codebook, and k ₂ may be equal to zero resources for the release-16 type II codebook. Moreover, p ₀ may be equal to 16 ports per resource for the single panel (e.g., since 16 ports per resource x 8 resources = 128 total ports) , p ₁ may be equal to zero ports per resource for the release-15 type II codebook, and p ₂ may be equal to zero ports per resource for the release-16 type II codebook. When CSI-reporting for only a Rel-16 type II codebook is being configured, k ₂ may be equal to 4 resources for Rel-16 type II codebook (k ₁ may be equal to zero resources for the release-15 type II codebook, and k ₀ may be equal to zero resources for the Type I single panel codebook) . Moreover, p ₂ may be equal to 16 ports per resource for the Rel-16 Type II codebook. The sum of weighted resources is 12 and the sum of weighted total ports is 192, which are smaller than the reported max sum of weighted resources (y = 14) and the reported max sum of weighted total ports (z = 256) .

As another example, when a combination of a type I single panel codebook and a release-16 type II codebook are being configured for simultaneous processing by the UE, k ₀ may be equal to 2 resources (e.g., weight resources of 2) for the single panel and k ₂ may be equal to 4 resources (e.g., weighted resources of 12) for the release-16 type II codebook. Therefore, the sum of the weighted resources may be 14, which is equal to the cap of the sum of weight resources (y) , as described herein. Moreover, p ₀ may be equal to 32 ports per resource (e.g., weighted ports = 32 ports per resource x 2 resources x weight of 1 = 64) for the single panel and p ₂ may be equal to 16 ports per resource (e.g., weighted ports = 16 ports per resource x 4 resources x weight of 3 = 192) for the release-16 type II codebook. Therefore, the sum of the weighted ports may be 256, which is equal to the cap of the sum of weighted ports (z) , as described herein.

As another example, when a combination of a type I single panel codebook, release-15 type II codebook, and a release-16 type II codebook are being configured for simultaneous processing by the UE, k ₀ may be equal to 4 resources (e.g., weight resources of 4) for the single panel, k ₁ may be equal to 2 resources (e.g., weighted resources of 4) for the release-15 type II codebook, and k ₂ may be equal to 2 resources (e.g., weighted resources of 6) for the release-16 type II codebook. Therefore, the sum of the weighted resources may be 14, which is equal to the cap of the sum of weight resources (y) , as described herein. Moreover, p ₀ may be equal to 8 ports per resource (e.g., weighted ports = 8 ports per resource x 4 resources x weight of 1 = 32) for the single panel, p ₁ may be equal to 32 ports per resource (e.g., weighted ports = 32 ports per resource x 2 resources x weight of 2 = 128) for the release-15 type II codebook, and p ₂ may be equal to 16 ports per resource (e.g., weighted ports = 16 ports per resource x 2 resources x weight of 3 =96) for the release-16 type II codebook. Therefore, the sum of the weighted ports may be 256, which is equal to the cap of the sum of weight ports (z) , as described herein.

FIG. 9 is a flow diagram illustrating example operations 900 for wireless communication, in accordance with certain aspects of the present disclosure. The operations 900 may be performed, for example, by a BS (e.g., such as the BS 110a in the wireless communication network 100) .

Operations 900 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 240 of FIG. 2) . Further, the transmission and reception of signals by the BS in operations 900 may be enabled, for example, by one or more antennas (e.g., antennas 234 of FIG. 2) . In certain aspects, the transmission and/or reception of signals by the BS may be implemented via a bus interface of one or more processors (e.g., controller/processor 240) obtaining and/or outputting signals.

The operations 900 may begin, at block 905, by receiving an indication of a capability of a UE with respect to CSI-reporting, the capability of the UE being received for each of at least two codebooks to be processed by the UE. At block 910, the BS determining one or more parameters to be configured for the CSI-reporting based on the capability of the UE, and at block 915, configures the UE to perform the CSI-reporting using the determined one or more parameters. In certain aspects, the one or more parameters may be determined by assuming that the capability of the UE with respect to a first codebook of the at least two codebooks is the same as a second codebook of the at least two codebooks, if the first codebook and the second codebook are to be configured for simultaneous processing by the UE. In other aspects, configuring the UE to perform the CSI-reporting comprises avoiding configuring the UE to process the first codebook simultaneously with the second codebook.

In certain aspects, the first codebook may have a lower processing complexity at the UE as compared to the second codebook. For example, the second codebook may be a release-16 type II CSI codebook, and the first codebook may be a release-15 type II CSI codebook. In some cases, the indicated capability of the UE comprises at least one of a maximum number of resources to be configured for each of the at least two codebooks, a maximum number of ports per resource to be configured for each of the at least two codebooks, and a maximum number of total ports across the resources to be configured for each of the at least two codebooks. In certain aspects, if the second codebook and the first codebook are to be configured for simultaneous processing by the UE, the one or more parameters comprises at least one of a number of resources to be configured for each of the first and the second codebook such that a sum of the resources configured for the first and the second codebook is less than the a maximum number of resources to be configured for the second codebook, or a number of ports to be configured for each of the first codebook and the second codebook such that a sum of the ports configured for the first and the second codebook is less than the maximum number of ports to be configured for the second codebook.

FIG. 10 is a flow diagram illustrating example operations 1000 for wireless communication, in accordance with certain aspects of the present disclosure. The operations 1000 may be performed, for example, by UE (e.g., such as a UE 120a in the wireless communication network 100) . The operations 1000 may be complimentary operations by the UE to the operations 1000 performed by the BS. Operations 1000 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 280 of FIG. 2) . Further, the transmission and reception of signals by the UE in operations 1000 may be enabled, for example, by one or more antennas (e.g., antennas 252 of FIG. 2) . In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor 280) obtaining and/or outputting signals.

The operations 1000 may begin, at block 1005, by determining a capability of the UE with respect to channel state information (CSI) -reporting, the capability of the UE being received for each of at least two codebooks to be processed by the UE. At block 1010, the UE transmits an indication of the capability of the UE to a network entity, and at block 1015, receives a configuration of one or more parameters for the CSI-reporting in accordance with the capability of the UE. In certain aspects, the indication of the capability is determined by expecting that the one or more parameters are to be configured by the network assuming that the capability of the UE with respect to a first codebook of the at least two codebooks is the same as a second codebook of the at least two codebooks, if the first codebook and the second codebook are to be configured for simultaneous processing by the UE, or the network entity is to avoid configuring the UE to process the first codebook simultaneously with the second codebook.

In other words, if release-15 and release-16 type II CSI are to be processed simultaneously, the UE expects the number of resources for each CSI, the number ports/resources for each CSI, and the number of total ports for each CSI should follow the reported capability of the release-16 type II CSI. Thus, the UE may report the capability for each codebook separately. For instance, if the BS configures Type I, release-15 Type II, and release-16 Type II codebooks for simultaneous processing, the capability of release-16 type II codebook becomes a joint constraint to the combination of the release-15 type II and the release-16 type II codebooks. That is, the number of resources for the type I codebook (k ₀) , the release-15 type II codebook (k ₁) , and the release-16 type II codebook (k ₂) , may be configured such that the following expressions hold true:

k ₀+k ₁+k ₂≤K

k ₀≤K ₀

k ₁+k ₂≤K ₂

Similarly, the number of ports for the type I codebook (p ₀) , the release-15 type II codebook (p ₁) , and the release-16 type II codebook (p ₂) may be configured, such that following expressions hold true for the total number of ports configured for the type I codebook, the release-15 type II codebook, and the release-16 type II codebook:

k ₀·p ₀+k ₁·p ₁+k ₂·p ₂≤N

k ₀·p ₀≤N ₀

k ₁·p ₁+k ₂·p ₂≤N ₂

Similarly, the number of ports for the type I codebook (p ₀) , the release-15 type II codebook (p ₁) , and the release-16 type II codebook (p ₂) may be configured, such that following equation hold true for the number of ports per resource configured for the type I codebook, the release-15 type II codebook, and the release-16 type II codebook:

p ₀≤P ₀

p ₁≤P ₂

p ₂≤P ₂

In some cases, release-15 and release-16 type II codebooks may not be configured for simultaneous processing by the UE. For example, if the BS configures the combination of type I and release-15 type II codebooks, the capability of each codebook and the total constraint may be followed. For example, the number of resources may be configured such that the following expressions hold true:

k ₀+k ₁≤K

k ₀≤K ₀

k ₁≤K ₁

Moreover, the total number of ports may be configured such that the following expressions hold true:

k ₀·p ₀+k ₁·p ₁≤N

k ₀·p ₀≤N ₀

k ₁·p ₁≤N ₁

Moreover, the number of ports per resource may be configured such that the following expressions hold true:

p ₀≤P ₀

p ₁≤P ₁

where k ₀ is the configured resources for a type I codebook, k ₁ is the configured resources for release-15 type II codebook, K ₀ is the maximum number of resources for the type I codebook, K ₁ is the maximum number of resources for the release-15 type II codebook, p ₀ is the configured ports per resource for the type I codebook, p ₁ is the configured ports per resource for the release-15 codebook, P ₀ is the maximum number of ports per resource for type I codebook, P ₁ is the maximum number of ports per resource for release-15 type II codebook, N ₁ is the maximum number of total ports across all resources for the type I codebook, and N ₂ is the maximum number of total ports across all resources for the release-15 type II codebook.

For implicit signalling of UE capabilities, as described with respect to FIGs. 7, 8A, and 8B, the y and z parameters may be reported per band-band combination, while the processing weight x _i may be reported per codebook and per-band. As another option, the UE may report y and z parameters per band, and also report y and z parameters per band-band combination, while x _i is reported per band. In this case, the BS 110 may follow the constraint of per band and per band-band combination.

As another example, if the BS configures a combination of type I and release-16 type II codebooks, the BS may follow the capability of each codebook and the total constraint. For example, the number of resources may be configured such that the following expressions hold true:

k ₀+k ₂≤K

k ₀≤K ₀

k ₂≤K ₂

k ₀·p ₀+k ₂·p ₂≤N

k ₀·p ₀≤N ₀

k ₂·p ₂≤N ₂

p ₀≤P ₀

p ₂≤P ₂

In some cases, the UE may indication capability information without expecting release-15 type II CSI and release-16 Type II CSI being configured for simultaneous processing. That is, the BS 110 may avoid configuring release-15 type II CSI and release-16 Type II CSI for simultaneous processing.

In otherwords, the UE may report its capability of processing release-15 Type II codebook without considering simultaneous processing of both release-15 and release-16 Type II codebook CSIs. Similarly, the UE may report capability of processing release-16 Type II codebook CSI without considering simultaneous processing of both release-15 and release-16 Type II codebook CSIs. For instance, the UE may indicate a maximum total number of resources of 14, a maximum number of resources for type I codebook as 8, maximum number of resources for release-15 type II as 6, and a maximum number of resources for release-16 Type II as 3. Since release-15 and release-16 Type II codebook are not to be configured for simultaneous processing, the configured resources based on the capability information indicated by the UE will be less than the maximum total number of resources of 14, assuming the number of cycles described with respect to FIG. 6. Therefore, the BS may configure resources such that the following expressions hold true:

k ₀≤K ₀

k ₁≤K ₁

k ₂≤K ₂

k ₀+k ₁≤K

k ₀+k ₂≤K

In this case, the following expression would not be a valid expression considered by the BS 110 since both release-15 and release-16 Type II codebook CSIs would not be configured for simultaneous processing:

k ₀+k ₁+k ₂≤K

With respect to the various aspects described herein, the UE may not expect to be configured with CSI report exceeding the UE’s capability. If the BS configures a CSI report that exceeds the UE capability (or does not follow established rule for configuring the CSI-report) , the UE may treat the configuration as an error case. In some cases, the UE does not expect to be configured with release-15 and release-16 CSI to be processed simultaneously.

The aspects described herein may be applied with UE capability signaling for band-band combination. For instance, in some cases, the UE may report the UE capability per band, and other cases, the UE may report the UE capability per band-band combination. As an example, in band A alone, the UE may support X CSI reports, while in band B alone, the UE may report Y CSI reports. If there is an inter-band carrier-aggregation (CA) (e.g., bands A and B are configured simultaneously) , the UE may report support for A’ in band A and B’ in band B.

In certain aspects, for each codebook type i, the UE may report one or more tuple (P _i, j, K _i, j, N _i, j) , j=0, 1, …. Certain aspects of the present disclosure are directed to enhancement of UE capability signaling to support concurrent codebooks. For example, in certain aspects, a UE may signal capability (P _i, j, K _i, j, N _i, j) for some codebook combinations, and for combinations not explicitly signaled, the UE may not expect to process them simultaneously.

In certain aspects, a UE may signal capability (P _i, j, K _i, j, N _i, j) for some codebook combinations. For combinations not explicitly signaled, (apart from the single-codebook capability of each codebook) , the UE may treat the mixed codebooks as one single (virtual) codebook.

FIG. 14 is a flow diagram illustrating example operations 1400 for wireless communication, in accordance with certain aspects of the present disclosure. The operations 1400 may be performed, for example, by a BS (e.g., such as the BS 110a in the wireless communication network 100) .

Operations 1400 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 240 of FIG. 2) . Further, the transmission and reception of signals by the BS in operations 1400 may be enabled, for example, by one or more antennas (e.g., antennas 234 of FIG. 2) . In certain aspects, the transmission and/or reception of signals by the BS may be implemented via a bus interface of one or more processors (e.g., controller/processor 240) obtaining and/or outputting signals.

The operations 1400 may begin, at block 1405, by receiving an indication of a capability of a user-equipment (UE) with respect to channel state information (CSI) -reporting, and at block 1410, determining one or more parameters associated with each of one or more CSI reports based on the capability of the UE, wherein the one or more parameters are determined based on a combination of codebooks or CSIs to be processed simultaneously by the UE. At block 1415, the BS may generates a CSI request for the one or more CSI reports, and at block 1420, transmits the CSI request to the UE to perform the CSI-reporting using the determined one or more parameters.

FIG. 15 is a flow diagram illustrating example operations 1500 for wireless communication, in accordance with certain aspects of the present disclosure. The operations 1500 may be performed, for example, by UE (e.g., such as a UE 120a in the wireless communication network 100) .

The operations 1500 may be complimentary operations by the UE to the operations 1500 performed by the BS. Operations 1500 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 280 of FIG. 2) . Further, the transmission and reception of signals by the UE in operations 1500 may be enabled, for example, by one or more antennas (e.g., antennas 252 of FIG. 2) . In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor 280) obtaining and/or outputting signals.

The operations 1500 may begin, at 1505, with the UE determining a capability of the UE with respect to channel state information (CSI) -reporting, and at block 1510, transmitting an indication of the capability of the UE. At block 1515, the UE receives a CSI request for one or more CSI reports, the CSI request comprising a configuration of one or more parameters associated with each of the one or more CSI reports, and at block 1520, determining the one or more CSI reports by determining the one or more parameters are in accordance with the capability reported by the UE, wherein determining the one or more parameters is based on a combination of codebooks or CSIs to be processed simultaneously by the UE.

For example, a virtual codebook may be determined based on the maximum ports/resource, and summing the number of resources and summing the total ports of the codebook combination. In other words, for combinations not explicitly signaled, (apart from the single-codebook capability of each codebook) , the following rule may be applied. The tuple of {maximum number of ports/resources among the concurrent CSI requests, sum the number of resources across the concurrent CSI requests, sum the number of total ports across the concurrent CSI requests} may be subject to the reported capability of any codebook types among the concurrent CSI request. Mathematically, denoting

as the set of concurrent CSI request (p _i, j, k _i, j) , and

as the max number of ports/resources,

and

as the sum number of resources and sum number of total ports, then:

such that

and

assuming

and

In other words, across all reports, the maximum ports per resource p _max may be determined. For each codebook type, the tuple

that has

closest and not less than p _max may be found. The sum of the number of resources may be capped by the minimum

among concurrent codebook types. Moreover, the sum of the number of total ports may be capped by the minimum

among concurrent codebook types. Both the BS and the UE may be configured with this rule. The BS may use the rule to perform CSI request scheduling (e.g., as a restriction for the scheduling) , and the UE may use the rule to check the validation of the CSI request (e.g., if invalid, it is an error case, and the corresponding procedure is up to UE implementation) .

FIGs. 16A-16F are tables illustrating example reported capabilities and triggered CSI-reports, in accordance with certain aspects of the present disclosure. As illustrated in FIG. 16B, a virtual codebook may be generated for a triggered CSI report of Type I SP codebook and a Rel-15 Type II codebook. As illustrated, the number of ports/resource (16) of the virtual codebook in FIG. 16B may be equal to the maximum of the number of ports/resource of the configured CSI reports. Moreover, the number of resources of the virtual codebook for the triggered CSI report of FIG. 16B is the sum of the number of resources (4+1) for the codebook types of the triggered CSI report, which is equal to 5. Similarly, the total number of ports of the virtual codebook for the triggered CSI report of FIG. 16B is the sum of the total number of ports (48+16) for the codebook types of the triggered CSI report, which is equal to 64. The virtual codebook is then compared to the reported capability, as illustrated in FIG. 16A, of the tuple

that have

closest and not less than p _max (e.g., which is (16, 4, 48) for the Type I SP) . Thus, the corresponding capability for the Type I SP codebook may be (16, 4, 48) . Therefore, the triggered CSI report for the type I SP codebook may be invalid since the total number of resources (5) and the total number of ports (64) of the virtual codebook are greater than the total number of resources (4) and the total number of ports (48) of the reported capability for the Type I SP codebook. Similarly, for the Rel-15 type II codebook, the triggered CSI report for may be invalid since the total number of resources (5) and the total number of ports (64) of the virtual codebook are greater than the total number of resources (2) and the total number of ports (48) of the reported capability for the Rel-15 type II codebook.

As illustrated in the triggered CSI-report of FIG. 16C, none of the reported capabilities illustrated in FIG. 16A for the Type I SP codebook have a match based on the virtual codebook of triggered CSI-report of FIG. 16C since both the tuples for the Type I SP (8, 8, 32) and (16, 4, 48) having a total number of ports/resource (8 and 16) that is less than the total number of ports/resource (48) of the virtual codebook. Therefore, the triggered CSI-report of FIG. 16C is also invalid.

The triggered CSI-report of FIG. 16D is also invalid since the total number of ports (48) of the virtual codebook is greater than the total number of ports (32) of the reported capability for the Rel-16 Type II codebook. The triggered CSI-reports of FIGs. 16E and 16F are valid since each codebook type has a tuple

that is not less than p _max of the corresponding CSI-report, and the total number of resources and the total number of ports of the virtual codebooks are less than the respective total number of resources and total number of ports of the reported capabilities for the codebook types.

FIGs. 17A-17B are tables illustrating example reported capabilities and triggered CSI-report, in accordance with certain aspects of the present disclosure. As illustrated, the type I SP codebook has a tuple

that has

closest and not less than p _max of the virtual codebook of the CSI-report of FIG. 17B. Thus, the triggered CSI-report is valid since each codebook type has a tuple

that is not less than p _max of the corresponding CSI-report, and the total number of resources (2) and the total number of ports (48) of the virtual codebooks are less than or equal to the respective total number of resources (2) and total number of ports (48) of the reported capabilities for the codebook types (Type I SP and Rel-15 Type II) .

In certain aspects, for combinations not explicitly signaled, the capability of the more complex codebook may be followed (e.g., in accordance with a complexity ranking) . The ranking may be reported by a UE (e.g., UE reports a complexity order for codebook type together with (P _i, j, K _i, j, N _i, j) ) . The sum of the number of resources and the sum of the total ports may follow the K _i, j and N _i, j reported in the more complex codebook.

In certain aspects, the ranking of the codebook complexity may be based on a rule, as described herein. For example, the ranking rule may be based on at least one of codebook type, number of ports/resource, number of resources and number of total ports. In certain aspects, the ranking rule may be based on a metric calculated as a function of codebook type, number of ports/res, number of resources, and number of total ports. The codebook with the higher (or lower in some cases) metric may be considered to have a higher complexity, as described in more detail herein.

For combinations not explicitly signaled, (apart from the single-codebook capability of each codebook) , the rule for determining the complexity order of the codebooks may be as follows. If the current codebook has the same codebook type i, the codebook with the larger number of ports/resource in its capability may be considered as the more complex codebook. Thus, the maximum sum of the number of resources may follow the capability of the codebook with larger max number of ports/resource, (e.g.,

where

) . Moreover, the maximum sum of the number of ports may follow the capability of the codebook with the larger maximum number of ports/resource, (e.g.,

where

) .

If the current codebooks are not the same type, the codebook with smaller number of resources in its capability may be considered to be the most complex codebook. The maximum sum of the number of resources may follow the capability of the codebook with the minimum resource (e.g.,

where

) . The maximum sum of the number of ports may follow the capability of the codebook with the minimum resources (e.g.,

where

If the current codebooks are not same type and have the same number of resources in their capabilities, the codebook with the smaller number of total ports in its capability may be considered to be the more complex codebook. The maximum sum of the number of resources may follow the capability of the codebook with the minimum total ports (e.g.,

where

) . Moreover, the maximum sum of the number of ports may follow the capability of the codebook with minimum total ports (e.g.,

where

) .

If there is a mixture of the two cases (e.g., some codebooks are the same type, and some codebooks are of different types) , the maximum sum of the number of resources/total ports

for each codebook type may be determined. Then the maximum sum of the number of resource/total ports for all codebooks may be determined based on a condition using the

as described in more detail herein.

FIGs. 18A-18D are tables illustrating example reported capabilities and corresponding triggered reports, in accordance with certain aspects of the present disclosure. As illustrated in FIG. 18A, the capabilities for codebooks of the same type (Type I) may be reported by a UE (e.g., two tuples (j = 0, 1) for the same codebook type (i = 0) . Thus, the more complex codebook may be considered to be the codebook capability with the larger number of ports/resource (32, 2, 40) . Therefore, the codebook combination is valid if the sum of the number of resources for the codebooks is less than or equal to 2 and the sum of the number of ports for the codebooks is less than or equal to 40. In other words, the condition to meet is as follows:

p _0, 0≤32, k _0, 0≤2, p _0, 0k _0, 0≤40

p _0, 1≤16, k _0, 1≤4, p _0, 1k _0, 1≤32

k _0, 0+k _0, 1≤2, p _0, 0k _0, 0+p _0, 1k _0, 1≤40

Thus, the triggered

report

1 and 3 are invalid, and the triggered report 2 is valid.

As illustrated in FIG. 18B, the capabilities for codebooks of different types (Type I and Re-15 Type II) may be reported by a UE. Thus, the more complicated codebook may be considered to be the codebook capability with the smaller number of resources (32, 2, 48) . Therefore, the condition to meet is as follows:

p _0, 0≤16, k _0, 0≤4, p _0, 0k _0, 0≤32

p _1, 0≤32, k _1, 0≤2, p _1, 0k _1, 0≤48

k _0, 0+k _1, 0≤2, p _0, 0k _0, 0+p _1, 0k _1, 0≤48

Thus, the triggered

report

1 and 2 are invalid, and the triggered report 3 is valid.

As illustrated in FIG. 18C, the capabilities for codebooks of different types (Rel-15 Type II and Re-16 Type II) may be reported by a UE. In this case, the number of resources of the codebook capabilities are the same (both 2) . Therefore, the codebook with the smaller number of total ports is considered to be the more complicated codebook (32, 2, 32) . Thus, the condition to meet is as follows:

p _0, 0≤32, k _0, 0≤2, p _0, 0k _0, 0≤48

p _1, 0≤32, k _1, 0≤2, p _1, 0k _1, 0≤32

k _0, 0+k _1, 0≤2, p _0, 0k _0, 0+p _1, 0k _1, 0≤32

Thus, the triggered report 1 is invalid, and the triggered report 2 is valid.

As illustrated in FIG. 18D, the capabilities for codebooks of both different types (Type I and Re-15 Type II) , and the same type (two tuples of Type I codebook) may be reported by a UE. In this case, the more complex codebook capability of the codebooks having the same type may be determined. For example, the reported capability (32, 4, 64) may be more complicated since it has the higher number of ports/resource (32) . Therefore, the condition to be met for the two Type I codebooks may be as follows:

k _0, 0+k _0, 1≤4, p _0, 0k _0, 0+p _0, 1k _0, 1≤64

Then, the complexity may be determined across codebook types. Thus, the Rel-15 Type II codebook capability is more complicated because the number of resources (3) of the Rel-15 Type II codebook is less than the number of resources (4) of the more complicated Type I codebook.

Thus, the condition to meet is as follows:

p _0, 0≤8, k _0, 0≤8, p _0, 0k _0, 0≤64

p _0, 1≤32, k _0, 1≤4, p _0, 1k _0, 1≤64

p _1, 0≤32, k _1, 0≤3, p _1, 0k _1, 0≤48

k _0, 0+k _0, 1≤4, p _0, 0k _0, 0+p _0, 1k _0, 1≤64

k _0, 0+k _1, 0+k _1, 0≤3, p _0, 0k _0, 0+p _0, 1k _0, 1+p _1, 0k _1, 0≤48

Thus, the triggered report 1 is invalid, and the triggered report 2 is valid.

In certain aspects, codebook parameters may be signaled per band. For example, the codebook capability is reported independently in each band.

Certain aspects of the present disclosure are directed to codebook combination capability and CSI reporting for inter-band carrier aggregation (CA) . For example, the signaling of the UE capability (P _i, j, K _i, j, N _i, j) for codebook combinations may be associated with a codebook combination parameters in a BandCombinationList. In other words, when capabilities of a codebook combination is reported, a carrier index for each codebook of each codebook combination may also be reported by the UE.

As described herein, for combinations not explicitly signaled, (apart from the single-codebook capability of each codebook) , the mixed codebooks may be treated as one single (e.g., virtual) codebook. In this case, the codebook combination may be applied regardless of inter-band CA, intra-band CA or non-CA case. For instance, with regards to the virtual codebook technique described herein, CSI1 with codebook 1 on CC1 and CSI2 with codebook type 2 on CC2 may be triggered. To determine validity of the triggered CSI, the maximum number of ports/resource in CSI1 and CSI2, p _max, may be determined. Then, it may be determined whether the capability of codebook 1 on CC1 and the capability of codebook 2 on CC2 satisfies p _max. Moreover, it may be determined whether the sum of the number of resources satisfy the capability of codebook 1 on CC1 and satisfy the capability of codebook 2 on CC2, and the sum of the number of total ports satisfy the capability of codebook 1 on CC1 and satisfy the capability of codebook 2 on CC2.

In certain aspects, for combinations not explicitly signaled, the UE may expect to not process the codebooks simultaneously. This technique may also be applied for inter-band CA. In other words, if a codebook combination is not reported for inter-band CA, then the codebook combination is not allowed to be triggered for simultaneous processing by the UE. The avoid of simultaneous processing may be only applied to some particular codebook combinations, e.g., any combination of Rel-15 Type II, Rel-15 Type II port selection, Rel-16 Type II and Rel-16 Type II port selection.

FIG. 11 illustrates a communications device 1100 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein. The communications device 1100 includes a processing system 1102 coupled to a transceiver 1108. The transceiver 1108 is configured to transmit and receive signals for the communications device 1100 via an antenna 1110, such as the various signals as described herein. The processing system 1102 may be configured to perform processing functions for the communications device 1100, including processing signals received and/or to be transmitted by the communications device 1100.

The processing system 1102 includes a processor 1104 coupled to a computer-readable medium/memory 1112 via a bus 1106. In certain aspects, the computer-readable medium/memory 1112 is configured to store instructions (e.g., computer-executable code) that when executed by the processor 1104, cause the processor 1104 to perform the operations illustrated herein. In certain aspects, computer-readable medium/memory 1112 stores code 1114 for receiving; code 1116 for determining, code 1118 for configuring. In certain aspects, the processor 1104 has circuitry configured to implement the code stored in the computer-readable medium/memory 1112. The processor 1104 includes circuitry 1120 for receiving; circuitry 1124 for determining, and circuitry 1126 for configuring.

FIG. 12 illustrates a communications device 1200 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein. The communications device 1200 includes a processing system 1202 coupled to a transceiver 1208. The transceiver 1208 is configured to transmit and receive signals for the communications device 1200 via an antenna 1210, such as the various signals as described herein. The processing system 1202 may be configured to perform processing functions for the communications device 1200, including processing signals received and/or to be transmitted by the communications device 1200.

The processing system 1202 includes a processor 1204 coupled to a computer-readable medium/memory 1212 via a bus 1206. In certain aspects, the computer-readable medium/memory 1212 is configured to store instructions (e.g., computer-executable code) that when executed by the processor 1204, cause the processor 1204 to perform the operations described herein. In certain aspects, computer-readable medium/memory 1212 stores code 1214 for determining; code 1216 for transmitting, and code 1218 for receiving. In certain aspects, the processor 1204 has circuitry configured to implement the code stored in the computer-readable medium/memory 1212. The processor 1204 includes circuitry 1220 for determining; circuitry 1224 for transmitting, and circuitry 1226 for receiving.

The techniques described herein may be used for various wireless communication technologies, such as NR (e.g., 5G NR) , 3GPP Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal frequency division multiple access (OFDMA) , single-carrier frequency division multiple access (SC-FDMA) , time division synchronous code division multiple access (TD-SCDMA) , and other networks. The terms “network” and “system” are often used interchangeably. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM) . An OFDMA network may implement a radio technology such as NR (e.g. 5G RA) , Evolved UTRA (E-UTRA) , Ultra Mobile Broadband (UMB) , IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) . LTE and LTE-Aare releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-Aand GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) . cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) . NR is an emerging wireless communications technology under development.

The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, while aspects may be described herein using terminology commonly associated with 3G, 4G, and/or 5G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems.

In 3GPP, the term “cell” can refer to a coverage area of a Node B (NB) and/or a NB subsystem serving this coverage area, depending on the context in which the term is used. In NR systems, the term “cell” and BS, next generation NodeB (gNB or gNodeB) , access point (AP) , distributed unit (DU) , carrier, or transmission reception point (TRP) may be used interchangeably. A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG) , UEs for users in the home, etc. ) . A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS.

A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE) , a cellular phone, a smart phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc. ) , an entertainment device (e.g., a music device, a video device, a satellite radio, etc. ) , a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium. Some UEs may be considered machine-type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, another device (e.g., remote device) , or some other entity. A wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

Certain wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier may be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system bandwidth. For example, the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (called a “resource block” (RB) ) may be 12 subcarriers (or 180 kHz) . Consequently, the nominal Fast Fourier Transfer (FFT) size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz) , respectively. The system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (e.g., 6 RBs) , and there may be 1, 2, 4, 8, or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively. In LTE, the basic transmission time interval (TTI) or packet duration is the 1 ms subframe.

NR may utilize OFDM with a CP on the uplink and downlink and include support for half-duplex operation using TDD. In NR, a subframe is still 1 ms, but the basic TTI is referred to as a slot. A subframe contains a variable number of slots (e.g., 1, 2, 4, 8, 16, …slots) depending on the subcarrier spacing. The NR RB is 12 consecutive frequency subcarriers. NR may support a base subcarrier spacing of 15 KHz and other subcarrier spacing may be defined with respect to the base subcarrier spacing, for example, 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc. The symbol and slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing. Beamforming may be supported and beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. In some examples, MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. In some examples, multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.

In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication among some or all devices and equipment within its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity. Base stations are not the only entities that may function as a scheduling entity. In some examples, a UE may function as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs) , and the other UEs may utilize the resources scheduled by the UE for wireless communication. In some examples, a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network. In a mesh network example, UEs may communicate directly with one another in addition to communicating with a scheduling entity.

In some examples, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications. Generally, a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS) , even though the scheduling entity may be utilized for scheduling and/or control purposes. In some examples, the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum) .

The methods disclosed herein comprise one or more steps or actions for achieving the methods. The method steps and/or actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.

As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

As used herein, the term “determining” encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language of the claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more. ” Unless specifically stated otherwise, the term “some” refers to one or more. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed under the provisions of 35 U.S.C. §112 (f) unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the element is recited using the phrase “step for. ”

The various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions. The means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor. Generally, where there are operations illustrated in figures, those operations may have corresponding counterpart means-plus-function components with similar numbering.

The various illustrative logical blocks, modules and circuits described in connection with the present disclosure may be implemented or performed with a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device (PLD) , 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 commercially available 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, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

If implemented in hardware, an example hardware configuration may comprise a processing system in a wireless node. The processing system may be implemented with a bus architecture. The bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints. The bus may link together various circuits including a processor, machine-readable media, and a bus interface. The bus interface may be used to connect a network adapter, among other things, to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the case of a user terminal 120 (see FIG. 1) , a user interface (e.g., keypad, display, mouse, joystick, etc. ) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further. The processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system.

If implemented in software, the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium. Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media. A computer-readable storage medium may be coupled to a processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. By way of example, the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface. Alternatively, or in addition, the machine- readable media, or any portion thereof, may be integrated into the processor, such as the case may be with cache and/or general register files. Examples of machine-readable storage media may include, by way of example, RAM (Random Access Memory) , flash memory, ROM (Read Only Memory) , PROM (Programmable Read-Only Memory) , EPROM (Erasable Programmable Read-Only Memory) , EEPROM (Electrically Erasable Programmable Read-Only Memory) , registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. The machine-readable media may be embodied in a computer-program product.

A software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media. The computer-readable media may comprise a number of software modules. The software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions. The software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. By way of example, a software module may be loaded into RAM from a hard drive when a triggering event occurs. During execution of the software module, the processor may load some of the instructions into cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When referring to the functionality of a software module below, it will be understood that such functionality is implemented by the processor when executing instructions from that software module.

Also, any connection is 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 (IR) , 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 medium. Disk and disc, as used herein, include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and

disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Thus, in some aspects computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media) . In addition, for other aspects computer-readable media may comprise transitory computer-readable media (e.g., a signal) . Combinations of the above should also be included within the scope of computer-readable media.

Thus, certain aspects may comprise a computer program product for performing the operations presented herein. 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.

Further, it should be appreciated that modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a user terminal and/or base station as applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc. ) , such that a user terminal and/or base station can obtain the various methods upon coupling or providing the storage means to the device. Moreover, any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

It is to be understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

A method for wireless communication, comprising:

receiving an indication of a capability of a user-equipment (UE) with respect to channel state information (CSI) -reporting, the capability of the UE being specific to a codebook combination to be processed simultaneously by the UE;

determining one or more parameters to be configured for the CSI-reporting based on the capability of the UE; and

configuring the UE to perform the CSI-reporting using the determined one or more parameters.
The method of claim 1, wherein the indicated capability of the UE comprises at least one of:

a maximum number of resources for the CSI-reporting for a particular codebook type;

a maximum number of ports per resource for the CSI-reporting for the particular codebook type; or

a maximum number of total ports across the resources for the CSI-reporting for the particular codebook type.
The method of claim 1, wherein the codebook combination is one of a plurality of codebook combinations, and wherein receiving the indication of the capability of the UE comprises receiving separate capability information for each of the plurality of codebook combinations.
The method of claim 3, wherein the separate capability information for each of the plurality of codebook combinations are different.
The method of claim 1, wherein:

the indicated capability of the UE comprises at least one codebook specific capability associated with each codebook of a plurality of codebooks and a processing weight associated with the codebook; and

the determination of the one or more parameters to be configured comprises calculating the capability of the UE specific to the codebook combination based on

the codebook specific capability of the UE associated with each codebook of a plurality of codebooks, and

the processing weight associated with the corresponding codebook.
The method of claim 5, wherein:

the indicated capability of the UE further comprises an indication of at least one cap associated with a sum of weighted codebook capabilities; and

a product of one of the one or more parameters associated with each of the plurality of codebooks and the processing weight associated with the corresponding codebook, summed for the plurality of codebooks, is less than the indicated cap.
The method of claim 6, wherein the capability comprises at least one of:

a maximum number of resources to be configured for a particular codebook type;

a maximum number of ports per resource to be configured for the particular codebook type; and

a maximum number of total ports to be configured across the resources for the particular codebook type.
The method of claim 7, wherein the indicated at least one cap comprises:

a first cap of a sum of weighted resources such that the product of a number of resources to be configured for each of the plurality of codebooks and the processing weight of the codebook, summed for the plurality of codebooks, is less than the indicated first cap; and

a second cap of a sum of weighted ports such that the product of a number of ports to be configured for each of the plurality of codebooks and the processing weight of the codebook, summed for the plurality of codebooks, is less than the indicated second cap.
The method of claim 7, further comprising receiving an indication of a maximum total number of resources for the CSI-reporting such that the resources configured for the plurality of codebooks is less than the indicated maximum total number of resources.
The method of claim 7, further comprising receiving an indication of a maximum total number of ports for the CSI-reporting such that the ports configured for the plurality of codebooks is less than the indicated maximum total number of ports.
The method of claim 1, wherein the codebook combination comprises a combination of a first codebook for a first component carrier (CC) and a second codebook for a second CC.
The method of claim 1, wherein the indication of the capability of the UE comprises a carrier index associated with each codebook of the codebook combination.
A method for wireless communication by a user-equipment (UE) , comprising:

determining a capability of the UE with respect to channel state information (CSI) -reporting, the capability of the UE being specific to a codebook combination to be processed simultaneously by the UE; and

transmitting an indication of the capability of the UE; and

receiving a configuration of one or more parameters for the CSI-reporting in accordance with the indication of the capability.
The method of claim 13, wherein the indicated capability of the UE comprises at least one of:

a maximum number of resources for the CSI-reporting for a particular codebook type;

a maximum number of ports per resource for the CSI-reporting for the particular codebook type; or

a maximum number of total ports across the resources for the CSI-reporting for the particular codebook type.
The method of claim 13, wherein the codebook combination is one of a plurality of codebook combination, and wherein determining the indication of the capability of the UE comprises determining separate capability information for each of the plurality of codebook combinations.
The method of claim 15, wherein the separate capability information for each of the plurality of codebook combinations are different.
The method of claim 13, wherein the indicated capability of the UE comprises at least one codebook specific capability associated with each codebook of a plurality of codebooks and a processing weight associated with the codebook.
The method of claim 17, wherein the indicated capability of the UE further comprises an indication of at least one cap associated with a sum of weighted codebook capabilities such that a product of one of the one or more parameters associated with each of the plurality of codebooks and the processing weight associated with the corresponding codebook, summed for the plurality of codebooks, is less than the indicated cap.
The method of claim 18, wherein the capability comprises at least one of:

a maximum number of resources to be configured for a particular codebook type;

a maximum number of ports per resource to be configured for the particular codebook type; and

a maximum number of total ports to be configured across the resources for the particular codebook type.
The method of claim 19, wherein the indicated at least one cap comprises:

a first cap of a sum of weighted resources such that the product of a number of resources to be configured for each of the plurality of codebooks and the processing weight of the codebook, summed for the plurality of codebooks, is less than the indicated first cap; and

a second cap of a sum of weighted ports such that the product of a number of ports to be configured for each of the plurality of codebooks and the processing weight of the codebook, summed for the plurality of codebooks, is less than the indicated second cap.
The method of claim 19, further comprising transmitting an indication of a maximum total number of resources for the CSI-reporting such that the resources configured for the plurality of codebooks is less than the indicated maximum total number of resources.
The method of claim 19, further comprising receiving an indication of a maximum total number of ports for the CSI-reporting such that the ports configured for the plurality of codebooks is less than the indicated maximum total number of ports.
The method of claim 13, wherein the codebook combination comprises a combination of a first codebook for a first component carrier (CC) and a second codebook for a second CC.
The method of claim 13, wherein the indication of the capability of the UE comprises a carrier index associated with each codebook of the codebook combination.
A method for wireless communication, comprising:

receiving an indication of a capability of a user-equipment (UE) with respect to channel state information (CSI) -reporting, the capability of the UE being received for each of at least two codebooks to be processed by the UE;

determining one or more parameters to be configured for the CSI-reporting based on the capability of the UE; and

configuring the UE to perform the CSI-reporting using the determined one or more parameters, wherein:

the one or more parameters are determined by assuming that the capability of the UE with respect to a first codebook of the at least two codebooks is the same as a second codebook of the at least two codebooks, if the first codebook and the second codebook are to be configured for simultaneous processing by the UE; or

configuring the UE to perform the CSI-reporting comprises avoiding configuring the UE to process the first codebook simultaneously with the second codebook.
The method of claim 25, wherein the first codebook has a lower processing complexity at the UE as compared to the second codebook.
The method of claim 25, wherein the second codebook comprises a third-generation partnership program (3GPP) release-16 type II CSI codebook, and wherein the second codebook comprises a 3GPP release-15 type II CSI codebook.
The method of claim 25, wherein the indicated capability of the UE comprises at least one of:

a maximum number of resources to be configured for each of the at least two codebooks;

a maximum number of ports per resource to be configured for each of the at least two codebooks; and

a maximum number of total ports across the resources to be configured for each of the at least two codebooks.
The method of claim 28, wherein if the first codebook and the second codebook are to be configured for simultaneous processing by the UE, the one or more parameters comprises at least one of:

a number of resources to be configured for each of the first and the second codebook such that a sum of the resources configured for the first and the second codebook is less than the a maximum number of resources to be configured for the second codebook; or

a number of ports to be configured for each of the first codebook and the second codebook such that a sum of the ports configured for the first and the second codebook is less than the maximum number of ports to be configured for the second codebook.
A method for wireless communication by a user-equipment (UE) , comprising:

determining a capability of the UE with respect to channel state information (CSI) -reporting, the capability of the UE being received for each of at least two codebooks to be processed by the UE;

transmitting an indication of the capability of the UE to a network entity; and

receiving a configuration of one or more parameters for the CSI-reporting in accordance with the capability of the UE, wherein the capability is determined by expecting that:

the one or more parameters are to be configured by the network entity assuming that the capability of the UE with respect to a first codebook of the at least two codebooks is the same as a second codebook of the at least two codebooks, if the first codebook and the second codebook are to be configured for simultaneous processing by the UE; or

the network entity is to avoid configuring the UE to process the first codebook simultaneously with the second codebook.
The method of claim 30, wherein the first codebook has a lower processing complexity at the UE as compared to the second codebook.
The method of claim 30, wherein the second codebook comprises a third-generation partnership program (3GPP) release-16 type II CSI codebook, and wherein the first codebook comprises a 3GPP release-15 type II CSI codebook.
The method of claim 30, wherein the indicated capability of the UE comprises at least one of:

a maximum number of resources to be configured for each of the at least two codebooks;

a maximum number of ports per resource to be configured for each of the at least two codebooks; and

a maximum number of total ports across the resources to be configured for each of the at least two codebooks.
The method of claim 33, wherein if the first codebook and the second codebook are to be configured for simultaneous processing by the UE, the indication of the capability is determined by expecting that:

a number of resources to be configured for each of the first and the second codebook are configured by the network entity such that a sum of the resources configured for the first and the second codebook is less than the a maximum number of resources to be configured for the second codebook; or

a number of ports to be configured for each of the first codebook and the second codebook are configured by the network entity such that a sum of the ports configured for the first and the second codebook is less than the maximum number of ports to be configured for the second codebook.
A method for wireless communication, comprising:

receiving an indication of a capability of a user-equipment (UE) with respect to channel state information (CSI) -reporting;

determining one or more parameters associated with each of one or more CSI reports based on the capability of the UE, wherein the one or more parameters are determined based on a combination of codebooks or CSIs to be processed simultaneously by the UE;

generating a CSI request for the one or more CSI reports; and

transmitting the CSI request to the UE to perform the CSI-reporting using the determined one or more parameters.
The method of claim 35, wherein determining the one or more parameters comprises determining that a maximum number of ports per resource among the simultaneously processed CSIs is smaller than or equal to a capability of a maximum number of ports per resource reported by the UE for each codebook of the simultaneously processed CSIs.
The method of claim 36, wherein determining the one or more parameters comprises determining that a sum of a number of resources among the simultaneously processed CSIs is smaller than or equal to a capability of a maximum number of resources reported by the UE for a codebook of the simultaneously processed CSIs, wherein the capability of the maximum number of resources is associated with the capability of the maximum number of ports per resource.
The method of claim 36, wherein determining the one or more parameters comprises determining that a sum of a number of total ports among the simultaneously processed CSIs is smaller than or equal to the capability of a maximum number of total ports reported by the UE for each codebook of the simultaneously processed CSIs, wherein the capability of the maximum number of total ports is associated with the capability of the maximum number of ports per resource.
The method of claim 35, wherein the determination of the one or more parameters comprises determining that the one or more parameters meet the capability of the UE for a CSI having the most complexity among the simultaneously processed CSIs.
The method of claim 39, wherein determining the one or more parameters further comprises at least one of:

determining that a sum of a number of resources across the simultaneously processed CSIs is smaller than or equal to the capability of the UE regarding a maximum number of resources of a codebook associated with the simultaneously processed CSIs having the most complexity; or

determining that a sum of a number of total ports across the simultaneously processed CSIs is smaller than or equal to the capability of the UE regarding a maximum number of resources of the codebook associated with the simultaneously processed CSIs having the most complexity.
The method of claim 39, wherein:

receiving the capability of the UE further comprises receiving a ranking of the complexity of the CSIs or codebooks; and

the determination of the one or more parameters comprises determining that the one or more parameters meet the capability of the UE for the CSI having the most complexity based on the ranking.
The method of claim 39, wherein the complexity of each CSI of the simultaneously processed CSIs is determined based on at least one of a type of the codebook associated with the CSI, a reported capability of a maximum number of ports per resource of the codebook, a reported capability of a number of resources of the codebook, or a reported capability of a number of ports of the codebook.
The method of claim 39, wherein, if codebooks of the simultaneously processed CSI are of the same type, the CSI having a highest capability regarding a maximum number of ports per resource in the indicated capability is the CSI of the simultaneously processed CSI having the most complexity.
The method of claim 39, wherein, if the codebooks of the simultaneously processed CSI are of different types, the CSI having a least capability regarding a maximum number of resources in the indicated capability is the CSI of the simultaneously processed CSIs having the most complexity.
The method of claim 39, wherein, if the codebooks of the simultaneously processed CSIs are of different types and are associated with the same capability regarding a maximum number of resources, the CSI having a least capability regarding a maximum number of ports is the CSI of simultaneously processed CSIs having the most complexity.
The method of any one of claims 35-45, wherein:

the simultaneously processed CSI comprises a combination of CSIs for different component carriers; and

the determination of the one or more parameters comprises determining the one or more parameters associated with each of the one or more CSI reports based on the capability of the UE for the different component carriers, wherein the one or more parameters are determined based on the combination of codebooks or CSIs to be processed simultaneously by the UE for the different component carriers
The method of claim 35, wherein:

the method further comprises receiving, from the UE, an explicit report of capability for simultaneously processing CSIs with same or different codebook types; and

the determination of the one or more parameters comprises determining the one or more parameters for the simultaneously processed CSIs based on the explicit report if the capability for the simultaneously processed CSIs is included in the explicit report.
A method for wireless communication by a user-equipment (UE) , comprising:

determining a capability of the UE with respect to channel state information (CSI) -reporting;

transmitting an indication of the capability of the UE;

receiving a CSI request for one or more CSI reports, the CSI request comprising a configuration of one or more parameters associated with each of the one or more CSI reports; and

determining the one or more CSI reports by determining the one or more parameters are in accordance with the capability reported by the UE, wherein determining the one or more parameters is based on a combination of codebooks or CSIs to be processed simultaneously by the UE.
The method of claim 48, wherein determining the one or more CSI reports comprises determining that a maximum number of ports per resource among the simultaneously processed CSIs is smaller than or equal to a capability of a maximum number of ports per resource reported by the UE for each codebook of the simultaneously processed CSIs.
The method of claim 49, wherein determining the one or more CSI reports comprises determining that a sum of a number of resources among the simultaneously processed CSIs is smaller than or equal to a capability of a maximum number of resources reported by the UE for a codebook of the simultaneously processed CSIs, wherein the capability of the maximum number of resources is associated with the capability of the maximum number of ports per resource.
The method of claim 49, wherein determining the one or more CSI reports comprises determining that a sum of a number of total ports among the simultaneously processed CSIs is smaller than or equal to the capability of a maximum number of total ports reported by the UE for each codebook of the simultaneously processed CSIs, wherein the capability of the maximum number of total ports is associated with the capability of the maximum number of ports per resource.
The method of claim 48, wherein the determining the one or more CSI reports comprises determining that the one or more parameters meet the capability of the UE for a CSI having the most complexity among the simultaneously processed CSIs.
The method of claim 52, wherein determining the one or more CSI reports comprises at least one of:

determining that a sum of a number of resources across the simultaneously processed CSIs is smaller than or equal to the capability of the UE regarding a maximum number of resources of a codebook associated with the simultaneously processed CSIs having the most complexity; or

determining that a sum of a number of total ports across the simultaneously processed CSIs is smaller than or equal to the capability of the UE regarding a maximum number of resources of the codebook associated with the simultaneously processed CSIs having the most complexity.
The method of claim 52, wherein:

transmitting the indication of the capability of the UE further comprises transmitting a ranking of the complexity of the CSIs or codebooks; and

determining the one or more CSI reports comprises determining that the one or more parameters meet the capability of the UE for the CSI having the most complexity based on the ranking.
The method of claim 52, wherein the complexity of each CSI of the simultaneously processed CSIs is determined based on at least one of a type of the codebook associated with the CSI, a reported capability of a maximum number of ports per resource of the codebook, a reported capability of a number of resources of the codebook, or a reported capability of a number of ports of the codebook.
The method of claim 52, wherein, if codebooks of the simultaneously processed CSI are of the same type, the CSI having a highest capability regarding a maximum number of ports per resource in the indicated capability is the CSI of the simultaneously processed CSI having the most complexity.
The method of claim 52, wherein, if the codebooks of the simultaneously processed CSI are of different types, the CSI having a least capability regarding a maximum number of resources in the indicated capability is the CSI of the simultaneously processed CSIs having the most complexity.
The method of claim 52, wherein, if the codebooks of the simultaneously processed CSIs are of different types and are associated with the same capability regarding a maximum number of resources, the CSI having a least capability regarding a maximum number of ports is the CSI of simultaneously processed CSIs having the most complexity.
The method of any one of claims 48-58, wherein:

the simultaneously processed CSI comprises a combination of CSIs for different component carriers; and

the determination of the one or more CSI reports comprises determining the one or more parameters based on the capability reported by the UE for different component carriers, wherein determining the one or more parameters is based on the combination of codebooks or CSIs to be processed simultaneously by the UE for different component carriers
The method of claim 48, wherein:

the method further comprises transmitting, from the UE, an explicit report of capability for simultaneously processing CSIs with same or different codebook types; and

determining the one or more CSI reports comprises validating the one or more parameters for the simultaneously processed CSIs based on the explicit report if the capability for the simultaneously processed CSIs is included in the explicit report.