WO2021087948A1 - Signalisation de capacité d'équipement utilisateur (ue) - Google Patents

Signalisation de capacité d'équipement utilisateur (ue) Download PDF

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Publication number
WO2021087948A1
WO2021087948A1 PCT/CN2019/116581 CN2019116581W WO2021087948A1 WO 2021087948 A1 WO2021087948 A1 WO 2021087948A1 CN 2019116581 W CN2019116581 W CN 2019116581W WO 2021087948 A1 WO2021087948 A1 WO 2021087948A1
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WIPO (PCT)
Prior art keywords
csi
capability
codebook
reporting
combination
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PCT/CN2019/116581
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English (en)
Inventor
Chenxi HAO
Lei Xiao
Chao Wei
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Qualcomm Incorporated
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Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2019/116581 priority Critical patent/WO2021087948A1/fr
Priority to CN202080072205.4A priority patent/CN114556802A/zh
Priority to PCT/CN2020/109174 priority patent/WO2021027920A1/fr
Publication of WO2021087948A1 publication Critical patent/WO2021087948A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0628—Diversity capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for capability signaling.
  • 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. ) .
  • available system resources e.g., bandwidth, transmit power, etc.
  • multiple-access systems examples 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.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • New radio e.g., 5G NR
  • 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) .
  • CP cyclic prefix
  • NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • MIMO multiple-input multiple-output
  • Certain aspects of the present disclosure are directed to a method for wireless communication by a user-equipment (UE) .
  • the method generally includes determining a capability of the UE with respect to channel state information (CSI) -reporting, wherein the capability of the UE comprises at least one of a maximum number of ports per resource the UE can support for the CSI-reporting for a codebook combination to be processed simultaneously by the UE, a maximum number of resources the UE can support for the CSI-reporting across codebooks of the codebook combination, and a maximum number of total ports the UE can support for the CSI-reporting across the codebooks of the codebook combination, transmitting an indication of the capability of the UE, and receiving a CSI request or configuration message indicating a number of ports per resource, a number of resources, and a total number of ports that are in accordance with the indicated capability of the UE.
  • CSI channel state information
  • Certain aspects of the present disclosure are directed to a method for wireless communication by a user-equipment (UE) .
  • the method generally includes determining a first capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE, determining a second capability of the UE, the second capability being a number of PMIs supported by the UE when supporting the first capability, wherein the determination of the first capability and the second capability are dependent on each other, transmitting a message having at least an indication of the first capability and the second capability, and receiving a CSI request or configuration message indicating a number of ports per resource, a number of resources, a number of total ports, and a number of PMIs to be used for the CSI-reporting and that are in accordance with the first capability and the second capability.
  • CSI channel state information
  • Certain aspects of the present disclosure are directed to a method for wireless communication by a user-equipment (UE) .
  • the method generally includes determining a capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE, determining a maximum number of multiple-input and multiple-output (MIMO) layers supported by the UE for each of one or more codebook types associated with the codebook or the codebook combination, transmitting an indication of the capability of the UE and the maximum number of MIMO layers, and receiving a CSI request or configuration in accordance with the reported capability.
  • CSI channel state information
  • MIMO multiple-input and multiple-output
  • Certain aspects of the present disclosure are directed to a method for wireless communication.
  • the method generally includes receiving an indication of a capability of the UE with respect to channel state information (CSI) -reporting, wherein the capability of the UE comprises at least one of a maximum number of ports per resource the UE can support for the CSI-reporting for a codebook combination to be processed simultaneously by the UE, a maximum number of resources the UE can support for the CSI-reporting across codebooks of the codebook combination, and a maximum number of total ports the UE can support for the CSI-reporting across the codebooks of the codebook combination, generating a CSI request or configuration message indicating a number of ports per resource, a number of resources, and a total number of ports that are in accordance with the indicated capability of the UE, and transmitting the CSI request or the configuration message.
  • CSI channel state information
  • Certain aspects of the present disclosure are directed to a method for wireless communication.
  • the method generally includes receiving a message having an indication of a first capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE and a second capability of the UE, the second capability being a number of PMIs supported by the UE when supporting the first capability, generating a CSI request or configuration message indicating a number of ports per resource, a number of resources, a number of total ports, and a number of PMIs to be used for the CSI-reporting and that are in accordance with the first capability and the second capability, and transmitting the CSI request or configuration message.
  • CSI channel state information
  • Certain aspects of the present disclosure are directed to a method for wireless communication.
  • the method generally includes receiving an indication of a capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE and a maximum number of multiple-input and multiple-output (MIMO) layers supported by the UE for each of one or more codebook types associated with the codebook or the codebook combination, generating a CSI request or configuration message in accordance with the reported capability, and transmitting the CSI request or configuration message.
  • CSI channel state information
  • MIMO multiple-input and multiple-output
  • aspects of the present disclosure provide means for, apparatus, processors, and computer-readable mediums for performing the methods described herein.
  • 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.
  • 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.
  • BS base station
  • UE user equipment
  • FIG. 3 illustrates a number of processing cycles associated with various codebooks.
  • FIG. 4 is a table illustrating a number of resources reported by a UE for a combination of codebooks to be processed simultaneously by a UE.
  • FIG. 5 is a flow diagram illustrating example operations for wireless communication by a UE, in accordance with certain aspects of the present disclosure.
  • FIG. 6 is a flow diagram illustrating example operations for wireless communication by a BS, in accordance with certain aspects of the present disclosure.
  • FIG. 7 illustrates PMI subband size, in accordance with certain aspects of the present disclosure.
  • FIG. 8 is a flow diagram illustrating example operations for wireless communication by a UE, 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 is a flow diagram illustrating example operations for wireless communication by a BS, in accordance with certain 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.
  • aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for user-equipment (UE) capability signaling for codebook combination.
  • UE user-equipment
  • 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.
  • 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.
  • the wireless communication network 100 may be an NR system (e.g., a 5G NR network) .
  • 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.
  • 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.
  • backhaul interfaces e.g., a direct physical connection, a wireless connection, a virtual network, or the like
  • 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.
  • the BSs 110 and UEs 120 may be configured for channel state information (CSI) reporting and configuration.
  • the BS 110a includes a CSI manager configured to configure parameters for CSI reporting, in accordance with aspects of the present disclosure.
  • 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.
  • relay stations e.g., relay station 110r
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 may configure UEs for CSI reporting.
  • 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.
  • RRC radio resource control
  • the CSI report configurations may be associated with CSI-RS resources used for channel measurement (CM) , interference measurement (IM) , or both.
  • CM channel measurement
  • IM interference measurement
  • 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.
  • 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) .
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • CRI rank indicator
  • the structure of the PMI may vary based on the 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) .
  • the PMI further comprises a phase for cross panel combination.
  • 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.
  • WB wideband
  • SB subband
  • 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.
  • 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) .
  • PUCCH physical uplink control channel
  • CE medium access control element
  • 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) .
  • DCI downlink control information
  • 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.
  • 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.
  • CSI channel state information
  • 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.
  • NZP simultaneous non-zero power
  • CSI-RS channel CSI-reference signal
  • IM CSI-interference measurement
  • the gNB may trigger 1 type I report with 8 resources, or trigger 3 type II reports each with 2 resources.
  • the processing complexity associated with different codebook types may be unequal.
  • 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.
  • the UE may target supporting any combination (a, b) such that a is less than A and b is less than B.
  • the UE may have the capability to process eight resources in total.
  • 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.
  • the UE may instead report the maximum resources for release-15 type II as being 6.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 4 is a table 400 illustrating a number of resources reported by a UE for a combination of codebooks to be processed simultaneously by a UE.
  • a UE may report per-codebook capability (e.g., per band or per band combination or per-band per band combination) .
  • the UE may underreport the capability to accommodate concurrent codebook processing with mixed types.
  • the actual capability of a Rel-15 UE is 1) for Type I alone, processing 6 resources; 2) for Rel-15 Type II alone, processing 4 resources; 3) for Type I and Type II concurrently, processing 4 resources for type I and 2 resources for Type II, but not able to process 2 resources for Type I and 4 resources for Type II.
  • a Rel-15 UE may underreport Rel-15 type II capability from 4 to 2.
  • the UE’s real capability for Rel-16 Type II is 1) for Rel-16 Type II alone, processing 3 resources; 2) for concurrent Type I, Rel-15 Type II and Rel-16 Type II, processing 4, 1, and 1 resources, respectively, but not able to process 3, 2, 1 or 3, 1, 2 resources, respectively.
  • the Rel-16 UE may underreport Rel-15 type II capability from 4 to 1, and underreport Rel-16 Type II capability from 3 to 1.
  • the underreporting of the capability may be more important for band-combination implementations, and for frequency ranges (FRs) 1 and 2 (FR1-FR2) .
  • Certain aspects of the present disclosure are generally directed to UE capability signalling for a combination of codebooks having mixed types.
  • 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) .
  • UE e.g., such as a UE 120a in the wireless communication network 100.
  • 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.
  • processors e.g., controller/processor 280
  • the operations 500 begin, at block 502, by determining a capability of the UE with respect to channel state information (CSI) -reporting, wherein the capability of the UE comprises at least one of a maximum number of ports per resource the UE can support for the CSI-reporting for a codebook combination to be processed simultaneously by the UE, a maximum number of resources the UE can support for the CSI-reporting across codebooks of the codebook combination, and a maximum number of total ports the UE can support for the CSI-reporting across the codebooks of the codebook combination.
  • CSI channel state information
  • the UE may transmit an indication of the capability of the UE, and at block 506, receive a CSI request or configuration message indicating a number of ports per resource, a number of resources, and a total number of ports that are in accordance with the indicated capability of the UE.
  • the UE may report concurrent codebook capabilities with mixed types.
  • the types of codebooks may include Rel-15 Type II and Type I, or may include Rel-16 Type II and Type I.
  • the UE may report CSI-reporting parameters A, B, and C, A being a maximum number of ports/resource considering Rel-15 type II and Type I together, B being a maximum number of resources counting Rel-15 Type II and Type I together, and C being a maximum number of total ports counting Rel-15 Type II and Type I together.
  • the signaling of the capability may be per-band.
  • the configuration for processing Type I and Type II codebooks together should satisfy A, B and C reported by the UE.
  • the signaling may be per band combination (e.g., e.g., band 1 + band 2) .
  • the configuration for processing Type I and Type II codebooks together should satisfy A, B and C reported by the UE.
  • the signaling of the capability may be cross frequency range (FR) .
  • FR1 and FR2 combination e.g., FR1-FR2
  • the configuration for processing Type I and Type II codebooks together should satisfy A, B and C reported by the UE. Similar example applies to combination of Rel-16 Type II and Rel-15 Type I, or any other combination of more than two codebook types.
  • FIG. 6 is a flow diagram illustrating example operations 600 for wireless communication, in accordance with certain aspects of the present disclosure.
  • the operations 600 may be performed, for example, by a BS (e.g., such as the BS 110a in the wireless communication network 100) .
  • a BS e.g., such as the BS 110a in the wireless communication network 100.
  • Operations 600 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 600 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.
  • processors e.g., controller/processor 240
  • the operations 600 begin, at block 602, by receiving an indication of a capability of the UE with respect to channel state information (CSI) -reporting, wherein the capability of the UE comprises at least one of a maximum number of ports per resource the UE can support for the CSI-reporting for a codebook combination to be processed simultaneously by the UE, a maximum number of resources the UE can support for the CSI-reporting across codebooks of the codebook combination, and a maximum number of total ports the UE can support for the CSI-reporting across the codebooks of the codebook combination.
  • CSI channel state information
  • the BS may generate a CSI request or configuration message indicating a number of ports per resource, a number of resources, and a total number of ports that are in accordance with the indicated capability of the UE, and at block 606, transmit the CSI request or the configuration message.
  • a 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) .
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • CRI CSI-RS resource indicator
  • RI rank indicator
  • a UE may be configured with a finer PMI subband than CQI subband.
  • FIG. 8 is a flow diagram illustrating example operations 800 for wireless communication, in accordance with certain aspects of the present disclosure.
  • the operations 800 may be performed, for example, by UE (e.g., such as a UE 120a in the wireless communication network 100) .
  • UE e.g., such as a UE 120a in the wireless communication network 100.
  • Operations 800 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 800 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.
  • processors e.g., controller/processor 280
  • the operations 800 begin, at block 802, by determining a first capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE, and at block 804, determining a second capability of the UE, the second capability being a number of PMIs supported by the UE when supporting the first capability, wherein the determination of the first capability and the second capability are dependent on each other.
  • the UE transmits a message having at least an indication of the first capability and the second capability.
  • the UE receives a CSI request or configuration message indicating a number of ports per resource, a number of resources, a number of total ports, and a number of PMIs to be used for the CSI-reporting and that are in accordance with the first capability and the second capability.
  • the reporting of the UE’s support for the number of PMI subbands may be made jointly with the triplet of parameters A, B, and C, as described herein. In other words, the determination of R or supporting > 19 and the determination of the triplet are dependent on each other.
  • the indication of the UE’s support for the number of PMI subbands allows for the BS to configure parameters for the CSI-reporting based on the number of PMI subbands to be configured since the number of PMI subbands impacts the number of CSI-reporting parameters (e.g., number of resources) .
  • the signaling of the capability may be cross FR.
  • the configuration for processing Type I and Type II codebooks together should satisfy A, B and C reported by the UE. Similar example applies to combination of Rel-16 Type II and Rel-15 Type I, or any other combination of more than two codebook types.
  • the triplets of A, B, C, and D may be specific to a combination of bands. That is, for any CC in the corresponding band combination, the configuration for processing Type I and Type II codebooks together should satisfy A, B, C, and D reported by the UE.
  • the parameters A, B, and C may be specific to a single codebook (e.g., R is reported per codebook) , specific to a codebook of a combination (e.g., for codebook combo of codebook 1 and codebook 2, the UE signals the capability for codebook1 and codebook2 separately considering they are concurrently processed) , or specific to a codebook combination (e.g., for the combination of codebook1 and codebook2 together) .
  • 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) .
  • 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.
  • processors e.g., controller/processor 240
  • the operations 900 begin, at block 902, by receiving a message having an indication of a first capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE and a second capability of the UE, the second capability being a number of PMIs supported by the UE when supporting the first capability.
  • the BS may generate a CSI request or configuration message indicating a number of ports per resource, a number of resources, a number of total ports, and a number of PMIs to be used for the CSI-reporting and that are in accordance with the first capability and the second capability, and at block 906, transmit the CSI request or configuration message.
  • UE capability signaling may include an indication of a maximum number of multiple-input and multiple-output (MIMO) layers per band and per band combination.
  • MIMO multiple-input and multiple-output
  • the UE may support a common number of MIMO layers (e.g., rank) .
  • rank a number of MIMO layers
  • the UE may only support rank-1 for a Type II codebook which has a higher complexity, but also support rank-2 for a Type I codebook which has a lower complexity.
  • Certain aspects of the present disclosure are directed to UE capability signaling that supports codebook-specific rank capability.
  • 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) .
  • UE e.g., such as a UE 120a in the wireless communication network 100.
  • 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.
  • processors e.g., controller/processor 280
  • the operations 1000 begin, at block 1002, by determining a capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE, and at block 1004, determining a maximum number of multiple-input and multiple-output (MIMO) layers supported by the UE for each of one or more codebook types associated with the codebook or the codebook combination.
  • the UE may transmit an indication of the capability of the UE and the maximum number of MIMO layers, and at block 1008, receive a CSI request or configuration in accordance with the reported capability.
  • the UE may report a maximum number of MIMO layers. For instance, the UE may signal the supported maximum number of MIMO layers jointly with the triplet of CSI-reporting parameters A, B, and C, as described herein.
  • the UE may signal parameters A, B, C, and D, A being the maximum number of ports/resource, B being the maximum number of resources (e.g., for a single codebook or a certain codebook of a codebook combination or counting a combination of codebooks such as Rel-15 Type II and Type I together) , C being a maximum number of total ports (e.g., for a single codebook or a certain codebook of a codebook combination or counting the combination of codebooks such as Rel-15 Type II and Type I together) , and D being the indication the maximum number of MIMO layers supported for Rel-15 Type II and Type I.
  • A being the maximum number of ports/resource
  • B being the maximum number of resources (e.g., for a single codebook or a certain codebook of a codebook combination or counting a combination of codebooks such as Rel-15 Type II and Type I together)
  • C being a maximum number of total ports (e.g., for a single codebook or a certain codebook of a code
  • the signaling of the number of MIMO layers may be per band, or per combination of bands or per band in per band combinations or per combination of frequency ranges.
  • the UE may signal a maximum of 1 MIMO layer (i.e., rank-1) for Rel-15 or Rel-16 Type II and a maximum of 2 MIMO layers for Rel-15 Type I.
  • FIG. 11 is a flow diagram illustrating example operations 1100 for wireless communication, in accordance with certain aspects of the present disclosure.
  • the operations 1100 may be performed, for example, by a BS (e.g., such as the BS 110a in the wireless communication network 100) .
  • a BS e.g., such as the BS 110a in the wireless communication network 100.
  • Operations 1100 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 1100 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.
  • processors e.g., controller/processor 240
  • the operations 1100 begin, at block 1102, by receiving an indication of a capability of the UE with respect to channel state information (CSI) -reporting for a codebook or a codebook combination to be processed simultaneously by the UE and a maximum number of multiple-input and multiple-output (MIMO) layers supported by the UE for each of one or more codebook types associated with the codebook or the codebook combination.
  • the BS may generate a CSI request or configuration message in accordance with the reported capability, and at block 1106, transmit the CSI request or configuration message.
  • 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.
  • 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.
  • computer-readable medium/memory 1212 stores code 1214 for receiving/transmitting; code 1216 for determining, code 1218 for generating.
  • 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 receiving/transmitting; circuitry 1224 for determining, and circuitry 1226 for generating.
  • NR e.g., 5G NR
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc.
  • UTRA Universal Terrestrial Radio Access
  • 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) .
  • GSM Global System for Mobile Communications
  • 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.
  • NR e.g. 5G RA
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • LTE and LTE-A are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and 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 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.
  • NB Node B
  • BS next generation NodeB
  • AP access point
  • DU distributed unit
  • TRP transmission reception point
  • 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.
  • CPE Customer Premises Equipment
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC machine-type communication
  • eMTC evolved MTC
  • 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.
  • a network e.g., a wide area network such as Internet or a cellular network
  • Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband IoT
  • Certain wireless networks 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.
  • K orthogonal subcarriers
  • Each subcarrier may be modulated with data.
  • 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.
  • 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 1.8 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs may communicate directly with one another in addition to communicating with a scheduling entity.
  • two or more subordinate entities 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.
  • 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.
  • 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.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “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) .
  • 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 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.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • 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.
  • 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.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical 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.
  • a software module may be loaded into RAM from a hard drive when a triggering event occurs.
  • 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.
  • any connection is properly termed a computer-readable medium.
  • 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
  • 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 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.
  • computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media) .
  • 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.
  • certain aspects may comprise a computer program product for performing the operations presented herein.
  • 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.
  • 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.
  • a user terminal and/or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein.
  • 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.
  • storage means e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.
  • CD compact disc
  • floppy disk etc.
  • any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Certains aspects de la présente invention concernent un procédé de communication sans fil par un équipement utilisateur (UE). Le procédé consiste globalement à déterminer une capacité de l'UE par rapport à un rapport d'informations d'état de canal (CSI) de livre de codes ou de combinaison de livres de codes à traiter simultanément par l'UE, à déterminer un nombre maximum de couches d'entrées multiples et de sorties multiples (MIMO) prises en charge par l'UE pour chacun d'un ou de plusieurs types de livre de codes associés au livre de codes ou à la combinaison de livres de codes, à transmettre une indication de la capacité de l'UE et du nombre maximal de couches MIMO, et à recevoir une demande ou une configuration de CSI conformément à la capacité rapportée.
PCT/CN2019/116581 2019-08-14 2019-11-08 Signalisation de capacité d'équipement utilisateur (ue) WO2021087948A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/CN2019/116581 WO2021087948A1 (fr) 2019-11-08 2019-11-08 Signalisation de capacité d'équipement utilisateur (ue)
CN202080072205.4A CN114556802A (zh) 2019-08-14 2020-08-14 用户设备(ue)能力信号通知
PCT/CN2020/109174 WO2021027920A1 (fr) 2019-08-14 2020-08-14 Signalisation de capacité d'équipement utilisateur (ue)

Applications Claiming Priority (1)

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PCT/CN2019/116581 WO2021087948A1 (fr) 2019-11-08 2019-11-08 Signalisation de capacité d'équipement utilisateur (ue)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023108594A1 (fr) * 2021-12-17 2023-06-22 Qualcomm Incorporated Techniques de configuration d'une ressource de signal de référence d'informations d'état de canal commune et livre de codes de sélection de port de signal de référence d'informations d'état de canal

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