WO2022155942A1 - Contraintes sur la demande de csi et le rapport de csi par créneau ayant une numérologie différente - Google Patents

Contraintes sur la demande de csi et le rapport de csi par créneau ayant une numérologie différente Download PDF

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Publication number
WO2022155942A1
WO2022155942A1 PCT/CN2021/073520 CN2021073520W WO2022155942A1 WO 2022155942 A1 WO2022155942 A1 WO 2022155942A1 CN 2021073520 W CN2021073520 W CN 2021073520W WO 2022155942 A1 WO2022155942 A1 WO 2022155942A1
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WIPO (PCT)
Prior art keywords
csi
scs
carrying
constraints
request
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PCT/CN2021/073520
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English (en)
Inventor
Chenxi HAO
Lei Xiao
Yu Zhang
Heechoon Lee
Pranay Sudeep RUNGTA
Peter Gaal
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Qualcomm Incorporated
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Priority to PCT/CN2021/073520 priority Critical patent/WO2022155942A1/fr
Publication of WO2022155942A1 publication Critical patent/WO2022155942A1/fr

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    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • 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 determining constraints on channel state information (CSI) requests and CSI reporting.
  • CSI channel state information
  • 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. ) .
  • 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.
  • 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
  • New radio (e.g., 5G) 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 a downlink (DL) and on an uplink (UL) .
  • CP cyclic prefix
  • DL downlink
  • UL uplink
  • NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • MIMO multiple-input multiple-output
  • the systems, methods, and devices of the disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. After considering this discussion, and particularly after reading the section entitled “Detailed Description” one will understand how the features of this disclosure provide advantages that include improved and desirable techniques for determining constraints on channel state information (CSI) request and CSI report per slot of component carriers (CCs) with different numerology.
  • CSI channel state information
  • CCs component carriers
  • Certain aspects of the disclosure relate to a method for wireless communication by a user equipment (UE) .
  • the method generally includes determining one or more constraints on CSI processing based on at least two of a subcarrier spacing (SCS) of a CSI-request carrying CC, an SCS of a CSI-reference signal (CSI-RS) carrying CC, and an SCS of a CSI feedback carrying CC; and processing one or more CSI requests in accordance with the constraints.
  • SCS subcarrier spacing
  • CSI-RS CSI-reference signal
  • Certain aspects of the disclosure relate to a method for wireless communication by a network entity.
  • the method generally includes determining one or more constraints on CSI processing based on at least two of a SCS of a CSI-request carrying CC, an SCS of a CSI-RS carrying CC, and an SCS of a CSI feedback carrying CC; and transmitting one or more CSI requests to a UE in accordance with the constraints.
  • 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 showing examples for implementing a communication protocol stack in the example RAN architecture, in accordance with certain aspects of the present disclosure.
  • FIG. 3 is a block diagram conceptually illustrating a design of an example base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIG. 4 is an example frame format for certain wireless communication systems (e.g., new radio (NR) ) , in accordance with certain aspects of the present disclosure.
  • NR new radio
  • FIG. 5 illustrates a conceptual example of precoder matrices, in accordance with certain aspects of the present disclosure.
  • FIG. 6 is a call flow diagram illustrating a first example of Type II channel state information (CSI) feedback (CSF) , in accordance with certain aspects of the present disclosure.
  • CSI channel state information
  • FIG. 7 is a call flow diagram illustrating a second example of Type II CSF, in accordance with certain aspects of the present disclosure.
  • FIG. 8 illustrate an example CSI request and channel state feedback (CSF) scenario for component carriers (CCs) with different numerologies.
  • CSF channel state feedback
  • FIGs. 9A-9B illustrate example CSI request and CSF scenarios for CCs with different numerologies.
  • FIG. 10 illustrates example CSI request and CSF scenarios for CCs with different numerologies.
  • FIGs. 11A-11B illustrate example CSI request and CSF scenarios for CCs with different numerologies.
  • FIG. 12 is a flow diagram illustrating example operations for wireless communication by a UE, in accordance with certain aspects of the present disclosure.
  • FIG. 13 is a flow diagram illustrating example operations for wireless communication by a network entity, in accordance with certain aspects of the present disclosure.
  • FIGs. 14A-14C illustrate example CSI request and CSF scenarios for CCs with different numerologies that may be addressed in accordance with certain aspects of the present disclosure.
  • FIGs. 15A-15C illustrate example CSI request and CSF scenarios for CCs with different numerologies that may be addressed in accordance with certain aspects of the present disclosure.
  • FIGs. 16A-16C illustrate example CSI request and CSF scenarios for CCs with different numerologies that may be addressed in accordance with certain aspects of the present disclosure.
  • FIG. 17 illustrates example CSI request and CSF scenarios for CCs with different numerologies that may be addressed in accordance with certain aspects of the present disclosure.
  • FIG. 18 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. 19 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.
  • aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for determining constraints on channel state information (CSI) processing per slot of component carriers (CCs) with different numerology based on a subcarrier spacing (SCS) of a CSI-request carrying CC, an SCS of a CSI-reference signal (CSI-RS) carrying CC, and/or an SCS of a CSI feedback carrying CC.
  • SCS subcarrier spacing
  • CSI-RS CSI-reference signal
  • the techniques may result in more efficient utilization of system resources and/or better system performance, for example, by allowing channel state feedback (CSF) to be provided more often and/or faster than achievable when applying conventional CSI constraints.
  • CSF channel state feedback
  • 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.
  • 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.
  • 3G 3 rd generation
  • 4G 4G
  • new radio e.g., 5G new radio (NR)
  • aspects of the present disclosure can be applied in other generation-based communication systems.
  • NR access may support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or beyond) , millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or beyond) , massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low-latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mmW millimeter wave
  • mMTC massive machine type communications MTC
  • URLLC ultra-reliable low-latency communications
  • These services may include latency and reliability requirements.
  • These services may also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements.
  • TTI transmission time intervals
  • QoS quality of service
  • these services may co-exist in the same subframe.
  • NR supports beamforming and beam direction may be dynamically configured.
  • MIMO transmissions with precoding may also be supported.
  • 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.
  • 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.
  • 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 include one or more base stations (BSs) 110 and/or one or more user equipments (UEs) 120a-y configured for determining constraints on channel state information (CSI) request and CSI report per slot of component carriers (CCs) with different numerology
  • a UE 120a includes a CSI manager 122 that may be configured for determining constraints on CSI processing, in accordance with operations 1200 of FIG. 12.
  • a BS 110a includes a CSI manager 112 that may be configured for determining constraints on CSI processing, in accordance with operations 1300 of FIG. 13.
  • the wireless communication network 100 may be a new radio (NR) system (e.g., a 5 th generation (5G) NR network) .
  • NR new radio
  • the wireless communication network 100 may be in communication with a core network 132.
  • the core network 132 may in communication with one or more BSs 110a-z (each also individually referred to herein as a BS 110 or collectively as BSs 110) and/or UEs 120a-y (each also individually referred to herein as a UE 120 or collectively as UEs 120) in the wireless communication network 100 via one or more interfaces.
  • BSs 110a-z each also individually referred to herein as a BS 110 or collectively as BSs 110
  • UEs 120a-y each also individually referred to herein as a UE 120 or collectively as UEs 120
  • the wireless network 100 may include a number of BSs 110 and other network entities.
  • a BS 110 may be a station that communicates with UEs 120.
  • Each BS 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a Node B (NB) and/or a Node B subsystem serving this coverage area, depending on the context in which the term is used.
  • NB Node B
  • gNB next generation NodeB
  • NR BS next generation NodeB
  • 5G NB next generation NodeB
  • AP access point
  • TRP transmission reception point
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS 110.
  • the base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces, such as a direct physical connection, a wireless connection, a virtual network, or the like using any suitable transport network.
  • a BS 110 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 120 with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having an association with the femto cell (e.g., UEs 120 in a Closed Subscriber Group (CSG) , UEs 120 for users in the home, etc.
  • CSG Closed Subscriber Group
  • a BS 110 for a macro cell may be referred to as a macro BS.
  • a BS 110 for a pico cell may be referred to as a pico BS.
  • a BS 110 for a femto cell may be referred to as a femto BS or a home BS.
  • 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 110 may support one or multiple (e.g., three) cells.
  • the wireless communication network 100 may also include relay stations.
  • a relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS 110 or a UE 120) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE 120 or a BS 110) .
  • a relay station may also be a UE 120 that relays transmissions for other UEs 120.
  • a relay station 110r may communicate with the BS 110a and a UE 120r in order to facilitate communication between the BS 110a and the UE 120r.
  • a relay station may also be referred to as a relay BS, a relay, etc.
  • the wireless communication network 100 may be a heterogeneous network that includes BSs 110 of different types, e.g., macro BS, pico BS, femto BS, relays, etc. These different types of BSs 110 may have different transmit power levels, different coverage areas, and different impact on interference in the wireless communication network 100.
  • macro BS may have a high transmit power level (e.g., 20 Watts) whereas pico BS, femto BS, and relays may have a lower transmit power level (e.g., 1 Watt) .
  • the wireless communication network 100 may support synchronous or asynchronous operation.
  • the BSs 110 may have similar frame timing, and transmissions from different BSs 110 may be approximately aligned in time.
  • the BSs 110 may have different frame timing, and transmissions from different BSs 110 may not be aligned in time.
  • the techniques described herein may be used for both synchronous and asynchronous operation.
  • 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.
  • the UEs 120 may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.
  • a UE 120 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.
  • 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 a downlink (DL) and single-carrier frequency division multiplexing (SC-FDM) on an uplink (UL) .
  • 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 1.08 MHz (i.e., 6 resource blocks) , 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.
  • NR may utilize OFDM with a CP on the UL and DL and include support for half-duplex operation using TDD. Beamforming may be supported and beam direction may be dynamically configured. Multiple input multiple output (MIMO) transmissions with precoding may also be supported. 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. 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.
  • MIMO Multiple input multiple output
  • a scheduling entity e.g., a BS 110
  • 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.
  • BSs 110 are not the only entities that may function as a scheduling entity.
  • a UE 120 may function as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs 120) , and the other UEs 120 may utilize the resources scheduled by the UE 120 for wireless communication.
  • a UE 120 may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs 120 may communicate directly with one another in addition to communicating with a scheduling entity.
  • a solid line with double arrows indicates desired transmissions between a UE 120 and a serving BS 110, which is a BS 110 designated to serve the UE 120 on the DL and/or the UL.
  • a finely dashed line with double arrows indicates interfering transmissions between a UE 120 and a BS 110.
  • the protocol stack 200 is split in the AN (e.g., BS 110 in FIG. 1) .
  • the RRC layer 205, PDCP layer 210, RLC layer 215, MAC layer 220, PHY layer 225, and RF layer 230 may be implemented by the AN.
  • the CU-CP may implement the RRC layer 205 and the PDCP layer 210.
  • a DU may implement the RLC layer 215 and MAC layer 220.
  • the AU/RRU may implement the PHY layer (s) 225 and the RF layer (s) 230.
  • the PHY layers 225 may include a high PHY layer and a low PHY layer.
  • the UE may implement the entire protocol stack 200 (e.g., the RRC layer 205, the PDCP layer 210, the RLC layer 215, the MAC layer 220, the PHY layer (s) 225, and the RF layer (s) 230) .
  • the entire protocol stack 200 e.g., the RRC layer 205, the PDCP layer 210, the RLC layer 215, the MAC layer 220, the PHY layer (s) 225, and the RF layer (s) 230.
  • FIG. 3 illustrates example components of a BS 110a and a UE 120a (e.g., in the wireless communication network 100 of FIG. 1) .
  • a transmit processor 320 may receive data from a data source 312 and control information from a controller/processor 340.
  • 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.
  • a medium access control (MAC) -control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes.
  • the MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH) , a physical uplink shared channel (PUSCH) , or a physical sidelink shared channel (PSSCH) .
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • PSSCH physical sidelink shared channel
  • the transmit processor 320 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the processor 320 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and cell-specific reference signal (CRS) .
  • a transmit MIMO processor 330 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 modulators (MODs) in transceivers 332a through 332t. Each MOD in transceivers 332 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • MODs modulators
  • Each MOD in transceivers 332 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal.
  • the DL signals from the MODs in transceivers 332a through 332t may be transmitted via antennas 334a through 334t, respectively.
  • antennas 352a through 352r may receive the DL signals from the BS 110a and may provide received signals to demodulators (DEMODs) in transceivers 354a through 354r, respectively.
  • Each DEMOD in the transceiver 354 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each DEMOD in the transceiver 354 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 356 may obtain received symbols from all the DEMODs in the transceivers 354a through 354r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 358 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 360, and provide decoded control information to a controller/processor 380.
  • a transmit processor 364 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) transmission from a data source 362 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 380.
  • the transmit processor 364 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 364 may be precoded by a transmit MIMO processor 366 if applicable, further processed by the DEMODs in transceivers 354a through 354r (e.g., for SC-FDM, etc. ) , and transmitted to the BS 110a.
  • the memories 342 and 382 may store data and program codes for the BS 110a and the UE 120a, respectively.
  • a scheduler 344 may schedule UEs for data transmission on the DL and/or the UL.
  • Antennas 352, processors 366, 358, 364, and/or controller/processor 380 of the UE 120a and/or antennas 334, processors 320, 330, 338, and/or controller/processor 340 of the BS 110a may be used to perform various techniques and methods described herein.
  • the controller/processor 340 of the BS 110a has a CSI manager 341 that may be configured to perform the operations illustrated in FIG. 13, as well as other operations disclosed herein.
  • the controller/processor 380 of the UE 120a has a CSI manager 381 that may be configured to perform the operations illustrated in FIG. 12, as well as other operations disclosed herein, in accordance with aspects of the present disclosure.
  • other components of the UE 120a and the BS 110a may be used performing the operations described herein.
  • NR may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink.
  • OFDM orthogonal frequency division multiplexing
  • CP cyclic prefix
  • the NR may support half-duplex operation using time division duplexing (TDD) .
  • OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier may be modulated with data. Modulation symbols may be 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 may be dependent on the system bandwidth.
  • the minimum resource allocation may be 12 consecutive subcarriers.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover multiple RBs.
  • the NR may support a base subcarrier spacing (SCS) of 15 KHz and other SCS may be defined with respect to the base SCS (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc. ) .
  • SCS base subcarrier spacing
  • FIG. 4 is a diagram showing an example of a frame format 400 for NR.
  • the transmission timeline for each of DL and UL may be partitioned into units of radio frames.
  • Each radio frame may have a predetermined duration (e.g., 10 ms) and may be partitioned into 10 subframes, each of 1 ms, with indices of 0 through 9.
  • Each subframe may include a variable number of slots (e.g., 1, 2, 4, 8, 16, ...slots) depending on a subcarrier spacing (SCS) .
  • Each slot may include a variable number of symbol periods (e.g., 7, 12, or 14 symbols) depending on the SCS. The symbol periods in each slot may be assigned indices.
  • a sub-slot structure may refer to a transmit time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols) .
  • Each symbol in a slot may be configured for a link direction (e.g., DL, UL, or flexible) for data transmission and the link direction for each subframe may be dynamically switched.
  • the link directions may be based on the slot format.
  • Each slot may include DL/UL data as well as DL/UL control information.
  • a synchronization signal block is transmitted.
  • SSBs may be transmitted in a burst where each SSB in the burst corresponds to a different beam direction for UE-side beam management (e.g., including beam selection and/or beam refinement) .
  • the SSB includes a PSS, a SSS, and a two symbol PBCH.
  • the SSB can be transmitted in a fixed slot location, such as the symbols 0-3 as shown in FIG. 4.
  • the PSS and SSS may be used by UEs for cell search and acquisition.
  • the PSS may provide half-frame timing, the SS may provide the CP length and frame timing.
  • the PSS and SSS may provide the cell identity.
  • the PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frame, SS burst set periodicity, system frame number, etc.
  • the SSBs may be organized into SS bursts to support beam sweeping. Further system information such as, remaining minimum system information (RMSI) , system information blocks (SIBs) , other system information (OSI) can be transmitted on a physical downlink shared channel (PDSCH) in certain subframes.
  • the SSB can be transmitted up to sixty-four times, for example, with up to sixty-four different beam directions for mmWave.
  • the multiple transmissions of the SSB are referred to as a SS burst set.
  • SSBs in an SS burst set may be transmitted in the same frequency region, while SSBs in different SS bursts sets can be transmitted at different frequency regions.
  • Channel state information may refer to 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 a receiver.
  • Channel estimation using 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 measured at the receiver, quantized, and fed back to the transmitter.
  • CSI may include channel quality indicator (CQI) , precoding matrix indicator (PMI) , CSI-RS resource indicator (CRI) , SS/PBCH Block Resource indicator (SSBRI) , layer indicator (LI) , rank indicator (RI) and/or L1-RSRP.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • CSI-RS resource indicator CRI
  • SSBRI SS/PBCH Block Resource indicator
  • LI layer indicator
  • RI rank indicator
  • L1-RSRP L1-RSRP
  • a UE may be configured by a BS for CSI reporting.
  • the BS may configure UEs for the CSI reporting.
  • the BS configures the UE with a CSI report configuration 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 (e.g., CSI-ReportConfig) .
  • RRC radio resource control
  • the CSI report configuration may be associated with CSI-RS resources for channel measurement (CM) , interference measurement (IM) , or both.
  • CSI report configuration configures CSI-RS resources for measurement (e.g., CSI-ResourceConfig) .
  • 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 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.
  • the PMI of any type there can be wideband (WB) PMI and/or subband (SB) PMI as configured.
  • WB wideband
  • SB subband
  • the CSI report configuration may configure the UE for aperiodic, periodic, or semi-persistent CSI reporting.
  • periodic CSI the UE may be configured with periodic CSI-RS resources.
  • Periodic CSI on physical uplink control channel (PUCCH) may be triggered via RRC.
  • Semi-persistent CSI reporting on physical uplink control channel (PUCCH) may be activated via a medium access control (MAC) control element (CE) .
  • MAC medium access control
  • CE 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 (e.g., CSI-AperiodicTriggerStateList and CSI-SemiPersistentOnPUSCH-TriggerStateList) .
  • 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 UE may report the CSI feedback (CSF) based on the CSI report configuration and the CSI report trigger. For example, the UE may measure the channel on which the triggered CSI-RS resources (associated with the CSI report configuration) is conveyed. Based on the measurements, the UE may select a preferred CSI-RS resource. The UE reports the CSF for the selected CSI-RS resource.
  • LI may be calculated conditioned on the reported CQI, PMI, RI and CRI; CQI may be calculated conditioned on the reported PMI, RI and CRI; PMI may be calculated conditioned on the reported RI and CRI; and RI may be calculated conditioned on the reported CRI.
  • Each CSI report configuration may be associated with a single downlink (DL) bandwidth part (BWP) .
  • the CSI report setting configuration may define a CSI reporting band as a subset of subbands of the BWP.
  • the associated DL BWP may indicated by a higher layer parameter (e.g., bwp-Id) in the CSI report configuration for channel measurement and contains parameter (s) for one CSI reporting band, such as codebook configuration, time-domain behavior, frequency granularity for CSI, measurement restriction configurations, and the CSI-related quantities to be reported by the UE.
  • Each CSI resource setting may be located in the DL BWP identified by the higher layer parameter, and all CSI resource settings may be linked to a CSI report setting have the same DL BWP.
  • the UE can be configured via higher layer signaling (e.g., in the CSI report configuration) with one out of two possible subband sizes (e.g., reportFreqConfiguration contained in a CSI-ReportConfig) which indicates a frequency granularity of the CSI report, where a subband may be defined as contiguous physical resource blocks (PRBs) and depends on the total number of PRBs in the bandwidth part.
  • the UE may further receive an indication of the subbands for which the CSI feedback is requested.
  • a subband mask is configured for the requested subbands for CSI reporting.
  • the UE computes precoders for each requested subband and finds the PMI that matches the computed precoder on each of the subbands.
  • a user equipment may be configured for channel state information (CSI) reporting, for example, by receiving a CSI configuration message from the base station.
  • CSI channel state information
  • the UE may be configured to report at least a Type II precoder across configured frequency domain (FD) units.
  • the precoder matrix W r for layer r includes the W 1 matrix, reporting a subest of selected beams using spatial compression and the W 2, r matrix, reporting (for cross-polarization) the linear combination coefficients for the selected beams (2L) across the configured FD units:
  • b i is the selected beam
  • c i is the set of linear combination coefficients (i.e., entries of W 2, r matrix)
  • L is the number of selected spatial beams
  • N 3 corresponds to the number of frequency units (e.g., subbands, resource blocks (RBs) , etc. ) .
  • L is RRC configured.
  • the precoder is based on a linear combination of DFT beams.
  • the Type II codebook may improve MU-MIMO performance.
  • the W 2, r matrix has size 2L X N 3 .
  • the UE may be configured to report FD compressed precoder feedback to reduce overhead of the CSI report.
  • the matrix 520 consists of the linear combination coefficients (amplitude and co-phasing) , where each element represents the coefficient of a tap for a beam.
  • the matrix 520 as shown is defined by size 2L X M, where one row corresponds to one spatial beam in W 1 (not shown) of size P X 2L (where L is network configured via RRC) , and one entry therein represents the coefficient of one tap for this spatial beam.
  • the UE may be configured to report (e.g., CSI report) a subset K 0 ⁇ 2LM of the linear combination coefficients of the matrix 520.
  • an entry in the matrix 520 corresponds to a row of matrix 530.
  • both the matrix 520 at layer 0 and the matrix 550 at layer 1 are 2L X M.
  • the matrix 530 is composed of the basis vectors (each row is a basis vector) used to perform compression in frequency domain.
  • the UE may report a subset of selected basis of the matrix via CSI report.
  • the M bases specifically selected at layer 0 and layer 1. That is, the M bases selected at layer 0 can be same/partially-overlapped/non-overlapped with the M bases selected at layer 1.
  • FIGs. 6 and 7 illustrate examples of such CSI based feedback where a gNB obtains the following terms based on a combination of SRS measurements taken at the gNB and feedback from the UE:
  • FIG. 6 is a call flow diagram illustrating an example of Type II port-selection CSI feedback (according to Release 16) .
  • the UE transmits SRS that the gNB measures to determine a spatial domain basis (b i ) . Assuming spatial reciprocity, the gNB precodes CSI-RS via the spatial domain basis (b i ) , wherein each CSI-RS port may be precoded via a particular spatial domain basis. Based on measurements of the precoded CSI-RS, the UE determines preferred CSI-RS ports and reports them and also reports other terms (c i, m and ) used to combine the preferred CSI-RS ports.
  • CSI-RS port refers to an antenna port used for CSI-RS transmission.
  • An antenna port is a logical concept related to physical layer (L1) , rather than an actual physical RF antenna.
  • L1 physical layer
  • an antenna port is defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed.
  • each individual downlink transmission is carried out from a specific antenna port, the identity of which is known to the UE and the UE can assume that two transmitted signals have experienced the same radio channel if and only if they are transmitted from the same antenna port.
  • the mapping of antenna ports to physical antennas is generally controlled by beam forming as a certain beam needs to transmits the signal on certain antenna ports to form a desired beam. As such, it is possible that two antenna ports may be mapped to one physical antenna port or that a single antenna port may be mapped to multiple physical antenna ports.
  • FIG. 7 is a call flow diagram illustrating another example of Type II CSI feedback (according to Release 17) .
  • the gNB determines both (b i ) and based on SRS measurements. Assuming both spatial and delay reciprocity, the gNB precodes CSI-RS via the spatial domain basis (b i ) and the frequency domain basis wherein each CSI-RS port maybe precoded via a particular pair of a spatial domain basis and a frequency domain basis. Based on measurements of the precoded CSI-RS, the UE determines preferred CSI-RS ports and reports them and also reports c i, m used to combine the preferred CSI-RS ports.
  • the CSI reporting of FIG. 7 may have certain benefits.
  • benefits include lower reporting overhead, lower UE complexity, and higher performance due to finer resolution of frequency domain basis and higher performance due to better spatial and frequency bases (gNB can use bases other than DFT bases, e.g., SVD bases, to gain more performance benefit) .
  • the precoder of a CSI-RS port is formed by a pair of an SD basis (or spatial domain transmission filter) b i and an FD basis (frequency domain transmission filter/weight) f m .
  • SD basis or spatial domain transmission filter
  • FD basis frequency domain transmission filter/weight
  • H is the wireless channel between UE and gNB without precoding, where i (p) and m (p) denote the indices of the spatial and frequency bases applied on port p, respectively.
  • the UE For each layer, the UE selects a subset of total ports, and reports a single coefficient per port across the frequency band.
  • the PMI for a certain layer on any of the N 3 FD units is given as:
  • P is the total number of CSI-RS ports.
  • the UE reports and or a subset of wherein the unreported coefficients are set to 0, K 0 is the maximum number of ports allowed to be selected for linear combination.
  • aspects of the present disclosure provide mechanisms for determining constraints on channel state information (CSI) processing per slot of component carriers (CCs) with different numerologies, jointly considering a subcarrier spacing (SCS) of a CSI-request carrying CC, an SCS of a CSI-reference signal (CSI-RS) carrying CC, and/or an SCS of a CSI feedback carrying CC.
  • SCS subcarrier spacing
  • CSI-RS CSI-reference signal
  • the techniques may result in more efficient utilization of system resources and/or better system performance, for example, by allowing channel state feedback (CSF) to be provided more often and/or faster than achievable when applying conventional CSI constraints.
  • CSF channel state feedback
  • the techniques may also relax UE implementation complexity.
  • a base station may send a channel state information (CSI) request as part of downlink (DL) control information (DCI) in an uplink (UL) grant on a physical DL control channel (PDCCH) to a user equipment (UE) .
  • the CSI request requests the UE to determine the CSI for one or more component carriers (CCs) , and to report the CSI back to the UE using a physical UL control channel (PUSCH) .
  • the UE transmits a CSI report (e.g., a CSI feedback (CSF) ) to the BS using the PUSCH.
  • CSI report e.g., a CSI feedback (CSF)
  • CSI processing may be certain constraints applied to CSI processing, for example, taking into account UE processing complexity. For example, there may be a limit on a number of CSI requests a UE is expected to receive in a given slot and/or a limit on a number of PUSCH transmissions (carrying CSF) the UE is expected to transmit per slot.
  • UE processing complexity For example, there may be a limit on a number of CSI requests a UE is expected to receive in a given slot and/or a limit on a number of PUSCH transmissions (carrying CSF) the UE is expected to transmit per slot.
  • the UE may not expect to receive more than one DCI containing a CSI request per slot. It is to be noted that although there may be multiple DCIs per slot, however only one DCI may contain the CSI request per slot.
  • the UE may consider this as an error event because only one DCI may contain the CSI request per slot.
  • the UE is not expected to transmit more than one PUSCH carrying CSF per slot. It is to be noted that although there may be multiple PUSCHs per slot, however only one PUSCH may contain the CSF per slot. In one example, as illustrated in the second example of FIG. 8, when there are multiple CCs (such as the CCI and the CC2) having the same numerology and the UE transmits multiple CSFs via multiple PUSCHs in a same slot, the BS may consider this as an error event because only one PUSCH may carry the CSF per slot.
  • CCs such as the CCI and the CC2
  • the UE and the BS have a clear understanding corresponding to constraints on a CSI request per slot and a CSF per slot when the CCs have a same numerology.
  • the constraints corresponding to the CSI request per slot and the CSF per slot may be unclear to the UE and the BS.
  • slot duration for a given CC corresponds to the SCS, in the case of multiple CCs with different numerologies (e.g., different SCS) there may be ambiguity on which CC is to be used to determine a slot duration, for purposes of applying CSI constraints.
  • FIGs. 9A and 9B illustrate example CCs with different numerologies (such as a CC1 with 60KHz SCS and a CC2 with 30KHz SCS) .
  • a duration/size of two slots e.g., a first slot and a second slot
  • the duration of one slot e.g., a first slot
  • the BS may want to transmit two different CSI requests (e.g., a first CSI request and a second CSI request) in different slots of the CC1 (e.g., the first CSI request in the first slot and the second CSI request in the second slot of the CC1) to the UE.
  • Both the first CSI request and the second CSI request may locate in the duration of the first slot of the CC2.
  • the UE or the BS considers a slot duration of each slot of the CC1 for determining whether the CSI requests are valid or not, then the two different CSI requests in the two different slots of the CC1 are valid because only one CSI request is received per slot.
  • the UE or the BS considers the slot duration of the first slot of the CC2 for determining whether the CSI requests are valid or not, then the two different CSI requests in the duration of the first slot of the CC2 are invalid since the UE may only receive one CSI request per slot.
  • the BS may want to transmit two different CSI requests (e.g., a first CSI request and a second CSI request) in different slots of the CC1 and the CC2 (e.g., the first CSI request in the second slot of the CC1 and the second CSI request in the first slot of the CC2) to the UE.
  • the first CSI request in the second slot of the CC1 is within the duration of the first slot of the CC2.
  • the UE or the BS considers a slot duration of each slot of the CC1 for determining whether the CSI requests are valid or not, then the first CSI request in the second slot of the CC1 is valid because only one CSI request is received per slot.
  • the UE or the BS considers the slot duration of the first slot of the CC2 for determining whether the CSI requests are valid or not, then the two different CSI requests in the duration of the first slot of the CC2 are invalid since the UE may only receive one CSI request per slot.
  • the BS may want to schedule the UE to transmit two different CSFs (e.g., a first CSF and a second CSF) in different slots of the CC1 (e.g., the first CSF in the first slot and the second CSF in the second slot of the CC1) to the BS.
  • Both the first CSF and the second CSF may locate in the duration of the first slot of the CC2.
  • the BS considers a slot duration of each slot of the CC1 for determining whether the CSFs transmitted by the UE are valid or not, then the two different CSFs transmitted in the two different slots of the CC1 are valid because only one CSF is transmitted per slot.
  • the BS considers the slot duration of the first slot of the CC2 for determining whether the CSFs transmitted by the UE are valid or not, then the two different CSFs transmitted in the duration of the first slot of the CC2 are invalid since the UE may only transmit one CSF per slot.
  • the BS may want to schedule the UE to transmit two different CSFs (e.g., a first CSF and a second CSF) in different slots of the CC1 and the CC2 (e.g., the first CSF in the second slot of the CC1 and the second CSF in the first slot of the CC2) to the BS.
  • the first CSF in the second slot of the CC1 is within the duration of the first slot of the CC2.
  • the BS considers a slot duration of each slot of the CC1 for determining whether the CSFs transmitted by the UE are valid or not, then the first CSF transmitted in the second slot of the CC1 is valid because only one CSF is transmitted per slot.
  • the BS considers the slot duration of the first slot of the CC2 for determining whether the CSFs transmitted by the UE are valid or not, then the two different CSFs transmitted in the duration of the first slot of the CC2 are invalid since the UE may only transmit one CSF per slot.
  • the constraints on CSI processing are not clear to the UE and/or the BS.
  • a numerology of a slot is defined.
  • the UE and/or the BS are to be aligned whether the constraints are to be applied if two CCs are in different scheduling groups under a carrier aggregation case. For example, there may be 4 CCs (such as a CC1, a CC2, a CC3, and a CC4) .
  • the CC1 and the CC2 may be in a first scheduling group where the CC1 may perform scheduling for the CC1 and the CC2.
  • the CC3 and the CC4 may be in a second scheduling group where the CC3 may perform scheduling for the CC3 and the CC4. In such a case, it should be clear to the UE and/or the BS whether the constraints for the CSI processing are applied when the CC1 and the CC3 are in different scheduling groups.
  • FIG. 10A illustrates multiple CCs that may have different numerology (such as a CC1 with 120KHz SCS and a CC2 with 30KHz SCS) .
  • a duration of four slots (e.g., a first slot, a second slot, a third slot, and a fourth slot) of the CC1 may be equal to the duration of one slot (e.g., a first slot) of the CC2.
  • a first scheme may be implemented where a constraint is determined based on the slot where a UE receives DCI.
  • a BS may want to transmit two different CSI requests (e.g., a first CSI request and a second CSI request) in different slots of the CC1 (e.g., the first CSI request in the first slot and the second CSI request in the second slot of the CC1) to the UE.
  • the CSI requests in the first slot and the second slot of the CC1 may trigger CSI reference signal (CSI-RS) measurements in the first slot of the CC2.
  • CSI-RS CSI reference signal
  • the CC1 may have back-to-back triggering of the two CSI requests, and the CSI-RS of these two back-to-back CSI requests may locate in the same first slot of the CC2.
  • the CSI requests are valid based on the definition of the slot per the first scheme (i.e., only one CSI request is received by the UE per slot) , however, the UE may have to locate and measure the CSI-RS twice in the first slot of the CC2, which is complicated for the UE.
  • FIGs. 11A and 11B illustrate multiple CCs that may have different numerology (such as a CC1 with 120KHz SCS and a CC2 with 30KHz SCS) .
  • a duration of four slots (e.g., a first slot, a second slot, a third slot, and a fourth slot) of the CC1 may be equal to the duration of one slot (e.g., a first slot) of the CC2.
  • a third scheme may be implemented where a slot, for constraint purposes, is the slot with lowest SCS across all the CCs (regardless of where the CSI request and the CSI-RS are transmitted, and the CSF is to be transmitted) .
  • a BS may want to transmit two different CSI requests (e.g., a first CSI request and a second CSI request) in different slots of the CC1 (e.g., the first CSI request in the first slot and the second CSI request in the second slot of the CC1) to a UE.
  • the first CSI request in the first slot of the CC1 may trigger a first CSI-RS measurement in the first slot of the CC1.
  • the second CSI request in the second slot of the CC1 may trigger a second CSI-RS measurement in the second slot of the CC1.
  • the CC1 may have back-to-back triggering of the two CSI requests in two different slots, and the CSI-RS of these two back-to-back CSI requests may also locate in the same slots of the CC1.
  • the UE and/or BS may determine the scenario shown in FIG. 11A as invalid when considering from the perspective of CC2 (determining slot duration based on the SCS of the CC2, which is 30KHz, as per the third scheme) . Since there is more than one CSI request in the single slot duration of the CC2, the UE and/the BS may determine the CSI requests to be invalid. However, since there is no cross carrier scheduling between the CCI and the CC2 as the CC1 is a scheduling cell of the CC1 (e.g., schedules the CRI-RSs for itself) , when the third scheme is not applied, the CSI requests are considered valid since only one CSI request is received per slot of the CC1. Also, when the third scheme is applied, the BS may have to wait N number of slots to trigger another CSI request if SCS of the CC1 is N times of SCS of the CC2.
  • the UE may be scheduled to transmit two different CSFs (e.g., a first CSF and a second CSF) in different slots of the CC1 to the BS.
  • the BS and/or the UE may determine the SCS of the slot duration to be the SCS of the CC2, which is 30KHz, as per the third scheme. Since the there is more than one CSF in the single slot duration of the CC2, the BS may determine the such scheduling case to be invalid. However, as noted above, since there is no cross carrier scheduling between the CCI and the CC2, when the third scheme is not applied, the CSFs could be considered valid. In other words, when the third scheme is applied, the BS may have to wait N number of slots after the first to schedule another CSF.
  • aspects of the present disclosure provide techniques for determining constraints on CSI processing per slot when CCs have different numerology.
  • the techniques may provide better clarity to the UE and/or the BS for the constraints on the CSI request per slot and/or the CSF per slot than by schemes described above and may result in more efficient resource utilization.
  • FIG. 12 is a flow diagram illustrating example operations 1200 for wireless communications by a UE, in accordance with certain aspects of the present disclosure.
  • the operations 1200 may be performed by a UE (e.g., such as the UE 120a in the wireless communication network 100 of FIG. 1) to determine constraints on CSI processing per slot when CCs have different numerology.
  • the operations 1200 may be implemented as software components that are executed and run on one or more processors (e.g., the controller/processor 380 of FIG. 3) .
  • the transmission and reception of signals by the UE in operations 1200 may be enabled, for example, by one or more antennas (e.g., the antennas 352 of FIG. 3) .
  • the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., the controller/processor 380) obtaining and/or outputting signals.
  • the operations 1200 begin, at 1202, by determining one or more constraints on CSI processing based on at least two of a SCS of a CSI-request carrying CC, an SCS of a CSI-RS carrying CC, and an SCS of a CSI feedback carrying CC.
  • the UE processes one or more CSI requests in accordance with the constraints.
  • FIG. 13 is a flow diagram illustrating example operations 1300 for wireless communication by a network entity.
  • operations 1300 may be performed by a network entity (e.g., a gNB) to trigger and process CSI feedback from a UE performing operations 1200 of FIG. 12.
  • the operations 1300 may be implemented as software components that are executed and run on one or more processors (e.g., the controller/processor 340 of FIG. 3) .
  • the transmission and reception of signals by the network entity in operations 1300 may be enabled, for example, by one or more antennas (e.g., the antennas 334 of FIG. 3) .
  • the transmission and/or reception of signals by the network entity may be implemented via a bus interface of one or more processors (e.g., the controller/processor 340) obtaining and/or outputting signals.
  • the operations 1300 begin, at 1302, by determining one or more constraints on CSI processing based on at least two of a SCS of a CSI-request carrying CC, an SCS of a CSI-RS carrying CC, and an SCS of a CSI feedback carrying CC.
  • the network entity transmits one or more CSI requests to a UE in accordance with the constraints.
  • a UE and/or a BS may determine one or more constraints on CSI processing based on an SCS of a CSI-RS carrying CC.
  • the UE processes one or more CSI requests in accordance with the constraints.
  • a network entity may determine one or more constraints on CSI processing based on an SCS of a CSI-RS carrying CC.
  • the network entity transmits one or more CSI requests to a UE in accordance with the constraints.
  • the one or more constraints include a constraint that the UE does not expect to receive more than one CSI request per a slot duration.
  • a network entity may try and avoid sending more than one CSI request per slot duration.
  • An SCS corresponding to this slot duration is determined based on joint consideration of at least two of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and the SCS of the CSI feedback carrying CC.
  • the determination of the SCS corresponding to the slot duration includes a minimum of the SCS of the CSI-request carrying CC and the SCS of the CSI-RS carrying CC.
  • the determination of the SCS corresponding to the slot duration includes a minimum of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and an SCS of the CSI feedback carrying CC.
  • the constraint is applied only when a scheduled CSI-RS is within a same slot as a DCI triggering the CSI request. In another non-limiting example, the constraint is applied to CCs within a same scheduling group.
  • the one or more constraints include a constraint that the UE does not expect to transmit more than one PUSCH carrying CSF per a slot duration.
  • a network entity may try and avoid sending CSI requests that would result in more than one CSF from a UE per slot duration.
  • An SCS corresponding to this slot duration is jointly determined based on at least two of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and the SCS of the CSI feedback carrying CC.
  • the determination of the SCS corresponding to the slot duration includes a minimum of the SCS of the CSI-request carrying CC and the SCS of the CSI feedback carrying CC.
  • the determination of the SCS corresponding to the slot duration includes a minimum of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and an SCS of the CSI feedback carrying CC.
  • a constraint is applied to CCs within a same scheduling group.
  • the one or more constraints include a constraint that the network entity transmits no more than one CSI request per a slot duration. In certain aspects, the one or more constraints include a constraint that the network entity triggers the UE to transmit no more than one PUSCH carrying CSI feedback per a slot duration.
  • FIGs. 12-13 CSI constraints according to the operations of FIGs. 12-13, with joint consideration of SCS of different CCs, may be understood with reference to FIGs. 14A-14C, FIGs. 15A-15C, and FIGs. 16A-16C, in accordance with certain aspects of the present disclosure.
  • CCs there are multiple CCs that may have different numerology (such as a CC1 with 120KHz SCS and a CC2 with 30KHz SCS) .
  • a duration of four slots (e.g., a first slot, a second slot, a third slot, and a fourth slot) of the CC1 may be equal to the duration of one slot (e.g., a first slot) of the CC2.
  • a UE and/or a BS may determine a constraint for CSI processing according to which the UE does not expect to receive more than one CSI request per slot duration from a BS.
  • the UE and/or BS may determine the SCS of the slot duration to be the SCS of the CC2, which is 30KHz. Since the UE has received more than one CSI request in the single slot duration of the CC2, the UE may determine the CSI requests received from the BS to be invalid. To ensure that the CSI requests received by the UE are considered valid by the UE, the BS may avoid sending back-to-back CSI requests in the CC1, which may result in two CSI-RS transmissions located in the same slot of the CC2, as illustrated in FIGs. 14A-14B.
  • the UE and/or BS may determine the SCS of the slot duration to be the SCS of the CC1, which is 120KHz. Since the UE has received only one CSI request per slot duration of the CC1, the UE may determine the CSI requests received from the BS to be valid. The BS may then determine to transmit back-to-back CSI requests in the CC1 where CSI-RS transmissions are on the CC1, as illustrated in FIG. 14C.
  • a UE and/or a BS applies a constraint for CSI processing only when a scheduled CSI-RS is within a same slot of a DCI triggering a CSI request.
  • a BS may transmit two different CSI requests (e.g., a first CSI request and a second CSI request) in different slots of a CC1 (120 KHz SCS) (e.g., a first CSI request in a first slot and a second CSI request in a second slot of the CC1) to the UE, it may trigger multiple CSI-RSs measurements in a second slot of a CC2 (30 KHz SCS) .
  • a CC1 120 KHz SCS
  • the duration of the second slot of the CC2 may begin after the duration of first four slots of the CC1 including its first and second slot. In such a case, the UE and/or BS may not apply the constraint for the CSI processing since the CSI-RS and the DCI are in different slots.
  • a transmission of two different CSI requests in different slots of a CC1 (120 KHz SCS) to the UE may trigger multiple CSI-RSs.
  • a first CRI-RS may be triggered in a third slot of the CC1 and a second CRI-RS may be triggered in a first slot of a CC2 (30 KHz SCS) .
  • the UE and/or BS may not apply the constraint for the CSI processing since the first CSI-RS is associated with the first CSI request and the second CSI-RS is associated with the second CSI request are on different CCs.
  • a UE and/or a BS applies a constraint to CCs within a same scheduling group. For example, as illustrated in FIG. 15C, when a BS may want to transmit two different CSI requests (e.g., a first CSI request and a second CSI request) in slots of a CC1 (60 KHz SCS) and a CC2 (30 KHz SCS) (e.g., a first CSI request in a first slot of the CC1 and a second CSI request in a first slot of the CC2) to the UE, it may trigger multiple CSI-RSs measurements.
  • a CSI requests e.g., a first CSI request and a second CSI request
  • a CC1 60 KHz SCS
  • a CC2 (30 KHz SCS)
  • a first CRI-RS may be triggered in the first slot of the CC1 (in response to the first CSI request) and a second CSI-RS may be triggered in the first slot of the CC2 (in response to the second CSI request) .
  • the CC1 is a scheduling cell of the CC1 (e.g., schedules the first CRI-RS for itself) and the CC2 is a scheduling cell of the CC2 (e.g., schedules the second CRI-RS for itself) .
  • different CCs belong to different scheduling groups.
  • This example case of CSI processing may be considered valid by the UE and the BS since the CC1 and the CC2 belong to different scheduling groups.
  • CCs there are multiple CCs that may have different numerology (such as a CC1 with 120 KHz SCS and a CC2 with 30 KHz SCS) .
  • a duration of four slots (e.g., a first slot, a second slot, a third slot, and a fourth slot) of the CC1 may be equal to the duration of one slot (e.g., a first slot) of the CC2.
  • a UE and/or a BS may determine a constraint for CSI processing according to which the UE does not expect to transmit more than one CSF per slot duration to a BS.
  • the UE and/or the BS may determine the SCS of the slot duration to be the SCS of the CC1, which is 120 KHz because all CSI requests, CSI-RSs and CSI reporting (CSFs) are on the CC1. Since the UE may be scheduled to transmit only one CSF per slot duration of the CC1, the BS may determine such scheduling of the CSI requests and CSI reporting (CSFs) to be valid.
  • the UE and/or the BS may determine the SCS of the slot duration to be the SCS of the CC2, which is 30 KHz because there is a CSI reporting on the CC2, which is a minimum of the SCS of the CC of the receiving PDCCH and the SCS of the CC of the transmitting PUSCH (and also a minimum of the SCS of the CC of the receiving PDCCH, the SCS of the CC of the transmitting PUSCH, and the SCS of the CC of the receiving CSI-RS) . Since the UE may be scheduled to transmit more than one CSF in the single slot duration of the CC2, the BS may determine such scheduling of the CSI requests and CSI reporting to be invalid and should avoid scheduling such CSI requests and CSI reporting.
  • a UE and/or a BS applies a constraint to CCs within a same scheduling group.
  • the CC1 is a scheduling cell of the CC1 and the CC2 is a scheduling cell of the CC2. Accordingly, different the CCs belong to different scheduling groups.
  • a technique may be implemented where a constant is determined based on a slot where a CSI-RS is transmitted.
  • a BS may want to transmit two different CSI requests (e.g., a first CSI request and a second CSI request) in a same first slot of a CC2 (30 KHz SCS) to a UE.
  • the first CSI request in the first slot of the CC2 may trigger a first CSI-RS measurement in a first slot of a CC1 (120 KHz SCS) .
  • the second CSI request in the first slot of the CC2 may trigger a second CSI-RS measurement in a second slot of the CC1.
  • the CC2 may have back-to-back triggering of the two CSI requests in the same first slot, and the CSI-RS of these two back-to-back CSI requests may locate in the different slots of the CC1.
  • the CSI requests are valid based on the definition of the slot per this technique (i.e., only one CSI request is received by the UE per slot and the slot is the slot of CC1 because CSI-RS is transmitted in CC1) , however, the UE may have to receive two CSI requests in one slot of CC2.
  • a BS may schedule accordingly. For example, if the constraint is that a UE only sends one CSF in a slot, given different numerologies, the BS may take care not to trigger the UE to send CSF that would violate this constraint. In other words, the BS may take care to avoid the UE encountering an invalid or error condition that violates the constraints.
  • FIG. 18 illustrates a communications device 1800 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in FIG. 12.
  • the communications device 1800 includes a processing system 1802 coupled to a transceiver 1802 (e.g., a transmitter and/or a receiver) .
  • the transceiver 1808 is configured to transmit and receive signals for the communications device 1800 via an antenna 1810, such as the various signals as described herein.
  • the processing system 1802 is configured to perform processing functions for the communications device 1800, including processing signals received and/or to be transmitted by the communications device 1800.
  • the processing system 1802 includes a processor 1804 coupled to a computer-readable medium/memory 1812 via a bus 1806.
  • the computer-readable medium/memory 1812 is configured to store instructions (e.g., a computer-executable code) that when executed by the processor 1804, cause the processor 1804 to perform the operations illustrated in FIG. 12, or other operations for performing the various techniques discussed herein.
  • computer-readable medium/memory 1812 stores code 1814 for determining and code 1816 for processing.
  • the code 1814 for determining may include code for determining one or more constraints on CSI processing based on at least two of a SCS of a CSI-request carrying CC, an SCS of a CSI-RS carrying CC, and an SCS of a CSI feedback carrying CC.
  • the code 1816 for processing may include code for processing one or more CSI requests in accordance with the constraints.
  • the processor 1804 may include circuitry configured to implement the code stored in the computer-readable medium/memory 1812, such as for performing the operations illustrated in FIG. 12, as well as other operations for performing the various techniques discussed herein.
  • the processor 1804 includes circuitry 1818 for determining and circuitry 1820 for processing.
  • the circuitry 1818 for determining may include circuitry for determining one or more constraints on CSI processing based on at least two of a SCS of a CSI-request carrying CC, an SCS of a CSI-RS carrying CC, and an SCS of a CSI feedback carrying CC.
  • the circuitry 1820 for processing may include circuitry for processing one or more CSI requests in accordance with the constraints.
  • FIG. 19 illustrates a communications device 1900 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in FIG. 13.
  • the communications device 1900 includes a processing system 1902 coupled to a transceiver 1908 (e.g., a transmitter and/or a receiver) .
  • the transceiver 1908 is configured to transmit and receive signals for the communications device 1900 via an antenna 1910, such as the various signals as described herein.
  • the processing system 1902 is configured to perform processing functions for the communications device 1900, including processing signals received and/or to be transmitted by the communications device 1900.
  • the processing system 1902 includes a processor 1904 coupled to a computer-readable medium/memory 1912 via a bus 1906.
  • the computer-readable medium/memory 1912 is configured to store instructions (e.g., a computer-executable code) that when executed by the processor 1904, cause the processor 1904 to perform the operations illustrated in FIG. 13, or other operations for performing the various techniques discussed herein.
  • computer-readable medium/memory 1912 stores code 1914 for determining and code 1916 for transmitting.
  • the processor 1904 may include circuitry configured to implement the code stored in the computer-readable medium/memory 1912, such as for performing the operations illustrated in FIG. 13, as well as other operations for performing the various techniques discussed herein.
  • the processor 1904 includes circuitry 1918 for determining and circuitry 1920 for transmitting.
  • the circuitry 1918 for determining may include circuitry for determining one or more constraints on (CSI processing based on at least two of a SCS of a CSI-request carrying CC, an SCS of a CSI-RS carrying CC, and an SCS of a CSI feedback carrying CC.
  • the circuitry 1920 for transmitting may include circuitry for transmitting one or more CSI requests to a user equipment (UE) in accordance with the constraints.
  • UE user equipment
  • a method for wireless communications by a user equipment comprises: determining one or more constraints on channel state information (CSI) processing based on at least two of a subcarrier spacing (SCS) of a CSI-request carrying component carrier (CC) , an SCS of a CSI-reference signal (CSI-RS) carrying CC, and an SCS of a CSI feedback carrying CC; and processing one or more CSI requests in accordance with the constraints.
  • CSI channel state information
  • the one or more constraints comprise a constraint that the UE does not expect to receive more than one CSI request per a slot duration, wherein an SCS corresponding to the slot duration is determined based on at least two of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and the SCS of the CSI feedback carrying CC.
  • determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC and the SCS of the CSI-RS carrying CC.
  • determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and an SCS of the CSI feedback carrying CC.
  • a fifth aspect alone or in combination with one or more of the first through fourth aspects, applying the constraint only when a scheduled CSI-RS is within a same slot as a downlink control information (DCI) triggering the CSI request.
  • DCI downlink control information
  • the one or more constraints comprise a constraint that the UE does not expect to transmit more than one physical uplink shared channel (PUSCH) carrying CSI feedback per a slot duration, wherein an SCS corresponding to the slot duration is determined based on at least two of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and the SCS of the CSI feedback carrying CC.
  • PUSCH physical uplink shared channel
  • determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC and the SCS of the CSI feedback carrying CC.
  • determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and an SCS of the CSI feedback carrying CC.
  • a method for wireless communications by a network entity comprises: determining one or more constraints on channel state information (CSI) processing based on at least two of a subcarrier spacing (SCS) of a CSI-request carrying component carrier (CC) , an SCS of a CSI-reference signal (CSI-RS) carrying CC, and an SCS of a CSI feedback carrying CC; and transmitting one or more CSI requests to a user equipment (UE) in accordance with the constraints.
  • CSI channel state information
  • the one or more constraints comprise a constraint that the network entity transmits no more than one CSI request per a slot duration, wherein an SCS corresponding to the slot duration is determined based on at least two of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and the SCS of the CSI feedback carrying CC.
  • determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC and the SCS of the CSI-RS carrying CC.
  • determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and an SCS of the CSI feedback carrying CC.
  • the one or more constraints comprise a constraint that the network entity triggers the UE to transmit no more than one physical uplink shared channel (PUSCH) carrying CSI feedback per a slot duration, wherein an SCS corresponding to the slot duration is determined based on at least two of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and the SCS of the CSI feedback carrying CC.
  • PUSCH physical uplink shared channel
  • determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC and the SCS of the CSI feedback carrying CC.
  • comprising determining the SCS corresponding to the slot duration comprises as a minimum of the SCS of the CSI-request carrying CC, the SCS of the CSI-RS carrying CC, and an SCS of the CSI feedback carrying CC.
  • An apparatus for wireless communication comprising at least one processor; and a memory coupled to the at least one processor, the memory comprising code executable by the at least one processor to cause the apparatus to perform the method of any of the first through twentieth aspects.
  • An apparatus comprising means for performing the method of any of the first through twentieth aspects.
  • a computer readable medium storing computer executable code thereon for wireless communications that, when executed by at least one processor, cause an apparatus to perform the method of any of the first through twentieth aspects.
  • 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
  • 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.
  • 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. 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.
  • 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, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , or a processor (e.g., a general purpose or specifically programmed processor) .
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • processor e.g., a general purpose or specifically programmed processor
  • 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 can also be considered as examples 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 and illustrated in FIG. 12 and/or FIG. 13.
  • 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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Abstract

Certains aspects de la présente divulgation se rapportent aux communications sans fil et, plus particulièrement, aux techniques destinées à déterminer des contraintes sur la demande d'informations d'état de canal (CSI) et le rapport de CSI par créneau ayant une numérologie différente.
PCT/CN2021/073520 2021-01-25 2021-01-25 Contraintes sur la demande de csi et le rapport de csi par créneau ayant une numérologie différente WO2022155942A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019213941A1 (fr) * 2018-05-11 2019-11-14 Qualcomm Incorporated Calcul d'informations d'état de canal apériodiques permettant une planification inter-porteuses

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019213941A1 (fr) * 2018-05-11 2019-11-14 Qualcomm Incorporated Calcul d'informations d'état de canal apériodiques permettant une planification inter-porteuses

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MEDIATEK INC: "Draft 38.214 CR on CSI request constraint per slot", vol. RAN WG1, no. e-Meeting; 20210125 - 20210205, 19 January 2021 (2021-01-19), XP051971370, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG1_RL1/TSGR1_104-e/Docs/R1-2101136.zip R1-2101136.docx> [retrieved on 20210119] *

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