WO2021253205A1 - Réglages de base de domaine de fréquence pour rapport d'informations d'état de canal - Google Patents

Réglages de base de domaine de fréquence pour rapport d'informations d'état de canal Download PDF

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Publication number
WO2021253205A1
WO2021253205A1 PCT/CN2020/096247 CN2020096247W WO2021253205A1 WO 2021253205 A1 WO2021253205 A1 WO 2021253205A1 CN 2020096247 W CN2020096247 W CN 2020096247W WO 2021253205 A1 WO2021253205 A1 WO 2021253205A1
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WIPO (PCT)
Prior art keywords
csi
rss
ports
precoder
adjustment information
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PCT/CN2020/096247
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English (en)
Inventor
Liangming WU
Chenxi HAO
Qiaoyu Li
Kangqi LIU
Yu Zhang
Fang Yuan
Chao Wei
Wanshi Chen
Min Huang
Wei XI
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Qualcomm Incorporated
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Priority to PCT/CN2020/096247 priority Critical patent/WO2021253205A1/fr
Publication of WO2021253205A1 publication Critical patent/WO2021253205A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0623—Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for frequency domain basis adjustment for channel state information reporting.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical 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, and/or the like) .
  • multiple-access technologies include 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, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • 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 orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication may include receiving, from a base station, a first set of channel state information reference signals (CSI-RSs) that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded.
  • the method also includes determining precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs.
  • the method further includes transmitting the precoder adjustment information to the base station based at least in part on a result of comparing the first measurement results and the second measurement results.
  • a method of wireless communication may include transmitting, to a UE, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded.
  • the method also includes receiving precoder adjustment information that is based at least in part on first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, and precoding communications to the UE based at least in part on the precoder adjustment information.
  • a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to receive, from a base station, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded.
  • the memory and the one or more processors may be configured to determine precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs.
  • the memory and the one or more processors may be configured to transmit the precoder adjustment information to the base station based at least in part on a result of comparing the first measurement results and the second measurement results.
  • a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to transmit, to a UE, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded.
  • the memory and the one or more processors may be configured to receive precoder adjustment information that is based at least in part on first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, and precode communications to the UE based at least in part on the precoder adjustment information.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the one or more processors to receive, from a base station, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded, determine precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, and transmit the precoder adjustment information to the base station based at least in part on a result of comparing the first measurement results and the second measurement results.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a base station, may cause the one or more processors to transmit, to a UE, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded, receive precoder adjustment information that is based at least in part on first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, and precode communications to the UE based at least in part on the precoder adjustment information.
  • an apparatus for wireless communication may include means for receiving, from a base station, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded, means for determining precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, and means for transmitting the precoder adjustment information to the base station based at least in part on a result of comparing the first measurement results and the second measurement results.
  • an apparatus for wireless communication may include means for transmitting, to a UE, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded, means for receiving precoder adjustment information that is based at least in part on first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, and means for precoding communications to the UE based at least in part on the precoder adjustment information.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
  • Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a diagram illustrating an example of a base station in communication with a user equipment (UE) in a wireless network, in accordance with various aspects of the present disclosure.
  • UE user equipment
  • Fig. 3 is a diagram illustrating an example of physical channels and reference signals in a wireless network, in accordance with various aspects of the present disclosure.
  • Fig. 4 is a diagram illustrating an example of precoded channel state information reference signals (CSI-RSs) , in accordance with various aspects of the present disclosure.
  • CSI-RSs channel state information reference signals
  • Fig. 5 is a diagram illustrating an example of linear combination coefficients, in accordance with various aspects of the present disclosure.
  • Fig. 6 is a diagram illustrating an example of frequency domain basis adjustment for CSI reporting, in accordance with various aspects of the present disclosure.
  • Fig. 7 is a diagram illustrating an example of a relationship between a first set of CSI-RSs and a second set of CSI-RSs, in accordance with various aspects of the present disclosure.
  • Fig. 8 is a diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Fig. 9 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the present disclosure.
  • Figs. 10-11 are block diagrams of example apparatuses for wireless communication, in accordance with various aspects of the present disclosure.
  • aspects may be described herein using terminology commonly associated with a 5G or NR radio access technologies (RAT) , aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G) .
  • RAT radio access technologies
  • Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with various aspects of the present disclosure.
  • the wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, and/or the like.
  • the wireless network 100 may include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a base station (BS) is an entity that communicates with user equipment (UEs) and may also be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • 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 association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • 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 BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., 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, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband internet of things
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • the processor components and the memory components may be coupled together.
  • the processor components e.g., one or more processors
  • the memory components e.g., a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular RAT and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with various aspects of the present disclosure.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) , a demodulation reference signal (DMRS) , and/or the like) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t.
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing 284.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Network controller 130 may include, for example, one or more devices in a core network.
  • Network controller 130 may communicate with base station 110 via communication unit 294.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • the UE 120 includes a transceiver.
  • the transceiver may include any combination of antenna (s) 252, modulators and/or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and/or TX MIMO processor 266.
  • the transceiver may be used by a processor (e.g., controller/processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as described with reference to Figs. 6-11.
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Base station 110 may include a scheduler 246 to schedule UEs 120 for downlink and/or uplink communications.
  • the base station 110 includes a transceiver.
  • the transceiver may include any combination of antenna (s) 234, modulators and/or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and/or TX MIMO processor 230.
  • the transceiver may be used by a processor (e.g., controller/processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as described with reference to Figs. 6-11.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with frequency domain basis adjustment for CSI reporting, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 800 of Fig. 8, process 900 of Fig. 9, and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, and/or the like) for wireless communication.
  • the one or more instructions when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the base station 110 to perform or direct operations of, for example, process 800 of Fig. 8, process 900 of Fig. 9, and/or other processes as described herein.
  • executing instructions may include running the instructions, converting the instructions, compiling the instructions, interpreting the instructions, and/or the like.
  • UE 120 may include means for receiving, from a base station, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded, means for determining precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, means for transmitting the precoder adjustment information to the base station based at least in part on a result of comparing the first measurement results and the second measurement results, and/or the like.
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • base station 110 may include means for transmitting, to a UE, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded, means for receiving precoder adjustment information that is based at least in part on first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, means for precoding communications to the UE based at least in part on the precoder adjustment information, and/or the like.
  • such means may include one or more components of base station 110 described in connection with Fig. 2, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like.
  • While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components.
  • the functions described with respect to the transmit processor 264, the receive processor 258, and/or the TX MIMO processor 266 may be performed by or under the control of processor 280.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • Fig. 3 is a diagram illustrating an example 300 of physical channels and reference signals in a wireless network, in accordance with various aspects of the present disclosure.
  • downlink channels and downlink reference signals may carry information from a base station 110 to a UE 120
  • uplink channels and uplink reference signals may carry information from a UE 120 to a base station 110.
  • a downlink channel may include a physical downlink control channel (PDCCH) that carries downlink control information (DCI) , a physical downlink shared channel (PDSCH) that carries downlink data, or a physical broadcast channel (PBCH) that carries system information, among other examples.
  • PDSCH communications may be scheduled by PDCCH communications.
  • an uplink channel may include a physical uplink control channel (PUCCH) that carries uplink control information (UCI) , a physical uplink shared channel (PUSCH) that carries uplink data, or a physical random access channel (PRACH) used for initial network access, among other examples.
  • the UE 120 may transmit acknowledgement (ACK) or negative acknowledgement (NACK) feedback (e.g., ACK/NACK feedback or ACK/NACK information) in UCI on the PUCCH and/or the PUSCH.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • a downlink reference signal may include a synchronization signal block (SSB) , a channel state information (CSI) reference signal (CSI-RS) , a demodulation reference signal (DMRS) , or a phase tracking reference signal (PTRS) , among other examples.
  • a uplink reference signal may include a sounding reference signal (SRS) , a DMRS, or a PTRS, among other examples.
  • An SSB may carry information used for initial network acquisition and synchronization, such as a primary synchronization signal (PSS) , a secondary synchronization signal (SSS) , a PBCH, and a PBCH DMRS.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH PBCH
  • DMRS PBCH DMRS
  • An SSB is sometimes referred to as a synchronization signal/PBCH (SS/PBCH) block.
  • the base station 110 may transmit multiple SSBs on multiple corresponding beams, and the SSBs may be used for beam selection.
  • a CSI-RS may carry information used for downlink channel estimation (e.g., downlink CSI acquisition) , which may be used for scheduling, link adaptation, or beam management, among other examples.
  • the base station 110 may configure a set of CSI-RSs for the UE 120, and the UE 120 may measure the configured set of CSI-RSs.
  • the UE 120 may perform channel estimation and may report channel estimation parameters to the base station 110 (e.g., in a CSI report) , such as a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) , a layer indicator (LI) , a rank indicator (RI) , or a reference signal received power (RSRP) , among other examples.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • CRI CSI-RS resource indicator
  • LI layer indicator
  • RI rank indicator
  • RSRP reference signal received power
  • the base station 110 may use the CSI report to select transmission parameters for downlink communications to the UE 120, such as a number of transmission layers (e.g., a rank) , a precoding matrix (e.g., a precoder) , a modulation and coding scheme (MCS) , or a refined downlink beam (e.g., using a beam refinement procedure or a beam management procedure) , among other examples.
  • a number of transmission layers e.g., a rank
  • a precoding matrix e.g., a precoder
  • MCS modulation and coding scheme
  • a refined downlink beam e.g., using a beam refinement procedure or a beam management procedure
  • a DMRS may carry information used to estimate a radio channel for demodulation of an associated physical channel (e.g., PDCCH, PDSCH, PBCH, PUCCH, or PUSCH) .
  • the design and mapping of a DMRS may be specific to a physical channel for which the DMRS is used for estimation.
  • DMRSs are UE-specific, can be beamformed, can be confined in a scheduled resource (e.g., rather than transmitted on a wideband) , and can be transmitted only when necessary. As shown, DMRSs are used for both downlink communications and uplink communications.
  • a PTRS may carry information used to compensate for oscillator phase noise.
  • the phase noise increases as the oscillator carrier frequency increases.
  • PTRS can be utilized at high carrier frequencies, such as millimeter wave frequencies, to mitigate phase noise.
  • the PTRS may be used to track the phase of the local oscillator and to enable suppression of phase noise and common phase error (CPE) .
  • CPE common phase error
  • PTRSs are used for both downlink communications (e.g., on the PDSCH) and uplink communications (e.g., on the PUSCH) .
  • An SRS may carry information used for uplink channel estimation, which may be used for scheduling, link adaptation, precoder selection, or beam management, among other examples.
  • the base station 110 may configure one or more SRS resource sets for the UE 120, and the UE 120 may transmit SRSs on the configured SRS resource sets.
  • An SRS resource set may have a configured usage, such as uplink CSI acquisition, downlink CSI acquisition for reciprocity-based operations, uplink beam management, among other examples.
  • the base station 110 may measure the SRSs, may perform channel estimation based at least in part on the measurements, and may use the SRS measurements to configure communications with the UE 120.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • Fig. 4 is a diagram illustrating an example 400 of precoded CSI-RSs, in accordance with various aspects of the present disclosure.
  • Fig. 4 shows a codebook structure W for 3GPP standardized release 16 and release 17, which provide enhancements for 5G NR.
  • Fig. 4 shows a Type II precoder, according to release 16, with a linear combination coefficient c i, m for a spatial domain.
  • a spatial domain basis vector may be represented by b i (the i-th column of W 1 ) .
  • a frequency domain basis vector (for element m-th row of M rows, n-th column of N columns of W F ) may be represented by ⁇ f m [n] .
  • W 1 [n] is the n-th subband precoder for CSI-RS with K selected ports, and linear combination coefficients may correspond to particular selected ports.
  • Fig. 4 shows an example of spatial vectors b i for resource blocks (RB 0, RB 1, ...RB N 3 -1) for a first port (Port 0) and a second port (Port 1) . There may be 2L beams.
  • Fig. 4 also shows a Type II precoder, according to release 17, with a linear combination coefficient c i, m for both a spatial domain (b i ) and a frequency domain ⁇ f m [n] .
  • Fig. 4 shows an example of a combination of spatial vectors b i and frequency domain vectors ⁇ f m [n] (subbands) for resource blocks (RB 0, RB 1, ...RB N 3 -1) for a first port (Port 0) , a second port (Port 1) , a third port (Port 2) , and a fourth port (Port 3) .
  • Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.
  • Fig. 5 is a diagram illustrating an example 500 of linear combination coefficients, in accordance with various aspects of the present disclosure.
  • Fig. 5 shows, according to release 16, constraints (for 2L beams) on a number of spatial linear beams and a number of frequency domain bases (for M subbands) .
  • Fig. 5 also shows constraints on a number of joint spatial domain and frequency domain linear combination coefficients (for K ports) .
  • a Type II precoder on a subband (n) has more flexibility in release 17 for reporting linear combination coefficients, and a codebook for release 17 is less limiting than a codebook for release 16.
  • Fig. 5 is provided as an example. Other examples may differ from what is described with regard to Fig. 5.
  • a CSI-RS may have reciprocity with an SRS.
  • a UE may measure a configured set of downlink CSI-RSs and provide a CSI report.
  • the UE may transmit uplink SRSs on configured SRS resource sets to be measured by a base station.
  • a spatial and frequency domain precoded CSI-RS (release 17) on a downlink channel may be based at least in part on an SRS measurement on an uplink channel, but there may be a mismatch between the downlink channel and the uplink channel (e.g., signal scattering is different in each direction) .
  • the mismatch may cause degradation of signal measurements and there may need to be a change in how precoders are determined.
  • the UE and the base station fall back to Type II precoders for release 16
  • the UE and the base station may lose precoding flexibility that is provided by release 17. As a result, the UE and the base station may suffer a degradation in communications.
  • a base station may reduce the mismatch between the downlink channel and the uplink channel for reciprocal reference signal measurements by transmitting additional CSI-RSs with only spatial domain precoding (and no frequency domain precoding) .
  • a UE may measure the additional CSI-RSs with only spatial domain precoding and determine a feedback adjustment relative to CSI-RSs that are both spatial domain and frequency domain precoded.
  • the UE may indicate feedback adjustment to the base station in information that includes linear combination coefficients.
  • the UE may use spatial domain precoded CSI-RSs to determine a more accurate frequency domain precoder.
  • the UE may, in turn, use the more accurate frequency domain precoder to determine a frequency domain basis rotation and/or feedback adjustment information that is transmitted to the base station.
  • the UE and the base station may improve throughput performance in non-ideal conditions that present poor reciprocity between downlink CSI-RSs and uplink SRSs.
  • Fig. 6 is a diagram illustrating an example 600 of frequency domain basis adjustment for CSI reporting, in accordance with various aspects of the present disclosure.
  • Fig. 6 shows a base station 610 (e.g., BS 110 depicted in Figs. 1 and 2) and a UE 620 (e.g., a UE 120 depicted in Figs. 1 and 2) that may communicate with each other.
  • a base station 610 e.g., BS 110 depicted in Figs. 1 and 2
  • a UE 620 e.g., a UE 120 depicted in Figs. 1 and 2
  • UE 620 may receive, from a base station, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded.
  • the spatial domain precoding of the first set of CSI-RSs and the second set of CSI-RSs may be correlated, and BS 610 may indicate a relationship between the first set of CSI-RSs and the second set of CSI-RSs to UE. This relationship will be further described in connection with Fig. 7.
  • UE 620 may determine how to adjust precoder feedback for BS 610 from the first set of CSI-RSs and the second set of CSI-RSs. For example, as shown by reference number 635, UE 620 may determine precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs. The UE may indicate any differences in the spatial domain and/or the frequency domain, as a result of the comparing, in the precoder adjustment information.
  • the precoder adjustment information may be specific to antenna ports that transmit the CSI-RSs (CSI-RS ports) .
  • the precoder adjustment information may include one or more parameters for frequency domain basis adjustment ⁇ f K , for the k-th port of K ports, where ⁇ f K may be defined according to a pre-determined basis (e.g., DFT basis) or a non-determined (more flexible) basis (e.g., singular value decomposition) .
  • the precoder adjustment information may include linear combination coefficients that UE 620 determines based at least in part on the frequency domain basis adjustment ⁇ f K and the second set of CSI-RS ports.
  • a spatial domain and frequency domain precoded channel after an adjustment based at least in part on the precoder adjustment information, may be represented by for the k-th port on the n-th frequency domain component.
  • ⁇ f K may be calculated as
  • port k with the same spatial domain precoder for a first set of CSI-RS ports and a second set of CSI-RS ports. may be calculated based at least in part on which may be a more accurate or optimal frequency domain precoder.
  • ⁇ f K may be reported as a part of PMI.
  • UE 620 may calculate linear combination coefficients base at least in part on ⁇ f K and/or determine other precoder adjustment information.
  • UE 620 may transmit the precoder adjustment information to BS 610.
  • UE 620 may calculate a PMI based at least in part on the precoder adjustment information and transmit the precoder adjustment information as part of the PMI.
  • UE 620 may transmit the precoder adjustment information in a semi-persistent CSI report.
  • UE 620 may transmit one or more parameters for frequency domain basis adjustment that include frequency domain precoder adjustments for one or more combinations of frequency subband, spatial domain component, or CSI-RS port.
  • UE 620 may transmit ⁇ f K in a differential manner (e.g., time domain with time t) .
  • UE 620 may transmit a difference between previous precoder adjustment information and new precoder adjustment information.
  • UE 620 may transmit fewer quantization bits for amplitude and phase quantization, which saves signaling resources.
  • BS 610 may precode communications to the UE based at least in part on the precoder adjustment information.
  • BS 610 and UE 620 may use a codebook that is based at least in part on frequency domain basis adjustments, and the frequency domain basis adjustments may be for a selected quantity of CSI-RS ports.
  • ⁇ f K [n] may be a frequency domain basis correction matrix (K ⁇ K size) for the n-th subband.
  • the k-th diagonal element may be equal to ⁇ f K [n] .
  • BS 620 may better precode communication in the frequency domain because of the precoder adjustment information that is derived using the additional spatial domain CSI-RSs.
  • Fig. 6 is provided as an example. Other examples may differ from what is described with regard to Fig. 6.
  • Fig. 7 is a diagram illustrating an example 700 of a relationship between a first set of CSI-RSs and a second set of CSI-RSs, in accordance with various aspects of the present disclosure.
  • BS 610 may indicate two sets of CSI-RS ports (for channel measurement) in a CSI report configuration to UE 620.
  • a first set of CSI-RS ports may include M CSI-RS ports, and a second set of CSI-RS ports may include N CSI-RS ports, where N ⁇ M.
  • the two sets of CSI-RS ports may share the same set of spatial domain precoders, where the relationship is indicated via signaling. For example, an i-th port in the first set of CSI-RS ports may have the same spatial domain as multiple ports (j-th port to k-th port) in the second set of CSI-RS ports.
  • Fig. 7 shows, for example, how port 0 of the first set of CSI-RS ports shares a same spatial precoder with port 0 and port 1 of the second set of CSI-RS ports, port 1 of the first set of CSI-RS ports shares a same spatial precoder with port 2 and port 3 of the second set of CSI-RS ports, and so forth.
  • UE 620 may use a predefined mapping rule or may receive downlink control information from BS 610 that indicates a mapping between the first set of CSI-RS ports and the second set of CSI-RS ports.
  • the base station may configure a number of updated ports (or the selection of K′ ports) by radio resource control (RRC) messages.
  • RRC radio resource control
  • a CSI report configuration may indicate K selected ports and K′ selected ports with frequency domain basis correction, where K′ ⁇ K ⁇ N.
  • a bit map may indicate selection of the K′ ports.
  • the base station may also configure the UE to report ⁇ f K in a semi-persistent CSI report.
  • Fig. 7 is provided as an example. Other examples may differ from what is described with regard to Fig. 7.
  • the various aspects described herein may also be used for spatial domain basis correction, uplink precoder correction, and/or other precoding in the downlink or uplink directions.
  • Fig. 8 is a diagram illustrating an example process 800 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 800 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with frequency domain basis adjustments for channel state information reporting.
  • the UE e.g., UE 120 and/or the like
  • process 800 may include receiving, from a base station, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded (block 810) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 800 may include determining precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs (block 820) .
  • the UE may determine precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs, as described above in connection with Figs. 6-7.
  • process 800 may include transmitting the precoder adjustment information to the base station based at least in part on a result of comparing the first measurement results and the second measurement results (block 830) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the precoder adjustment information includes one or more parameters for frequency domain basis adjustment.
  • the one or more parameters for frequency domain basis adjustment include frequency domain precoder adjustments for one or more combinations of frequency subband, spatial domain component, or CSI-RS port.
  • process 800 includes determining linear combination coefficients based at least in part on the one or more parameters for frequency domain adjustment and the second measurement results for the second set of CSI-RSs.
  • the first set of CSI-RSs is associated with one or more first CSI-RS ports and the second set of CSI-RSs is associated with one or more second CSI-RS ports, and a quantity of the one or more second CSI-RS ports is equal to or greater than a quantity of the one or more first CSI-RS ports.
  • the one or more first CSI-RS ports and the one or more second CSI-RS ports share a same set of spatial domain precoders.
  • a relationship between the one or more first CSI-RS ports and the one or more second CSI-RS ports is indicated by mapping information that is one or more of stored at the UE or received from the base station.
  • transmitting the precoder adjustment information includes calculating a PMI based at least in part on the precoder adjustment information and transmitting the precoder adjustment information as part of the PMI.
  • transmitting the precoder adjustment information includes transmitting the precoder adjustment information in a semi-persistent CSI report.
  • transmitting the precoder adjustment information includes transmitting a difference between previous precoder adjustment information and new precoder adjustment information.
  • process 800 includes using a codebook that is based at least in part on frequency domain basis adjustments.
  • process 800 includes receiving a radio resource control message indicating one or more CSI-RS ports that are candidates for frequency domain basis adjustment.
  • process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 8. Additionally, or alternatively, two or more of the blocks of process 800 may be performed in parallel.
  • Fig. 9 is a diagram illustrating an example process 900 performed, for example, by a base station, in accordance with various aspects of the present disclosure.
  • Example process 900 is an example where the base station (e.g., base station 110 and/or the like) performs operations associated with frequency domain basis adjustments for channel state information reporting.
  • the base station e.g., base station 110 and/or the like
  • process 900 may include transmitting, to a UE, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded (block 910) .
  • the base station e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like
  • process 900 may include receiving precoder adjustment information that is based at least in part on first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs (block 920) .
  • the base station e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like
  • process 900 may include precoding communications to the UE based at least in part on the precoder adjustment information (block 930) .
  • the base station e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like
  • Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the precoder adjustment information includes one or more parameters for frequency domain basis adjustment.
  • the one or more parameters for frequency domain basis adjustment include frequency domain precoder adjustments for one or more combinations of frequency subband, spatial domain component, and CSI-RS port.
  • receiving the precoder adjustment information includes receiving linear combination coefficients that are based at least in part on the one or more parameters for frequency domain adjustment and the second measurement results for the second set of CSI-RSs.
  • the first set of CSI-RSs is associated with one or more first CSI-RS ports and the second set of CSI-RSs is associated with one or more second CSI-RS ports, and a quantity of the one or more second CSI-RS ports is equal to or greater than a quantity of the one or more first CSI-RS ports.
  • the one or more first CSI-RS ports and the one or more second CSI-RS ports share a same set of spatial domain precoders.
  • process 900 includes transmitting mapping information indicating a relationship between the one or more first CSI-RS ports and the one or more second CSI-RS ports.
  • receiving the precoder adjustment information includes receiving the precoder adjustment information as part of a precoding matrix indicator.
  • receiving the precoder adjustment information includes receiving the precoder adjustment information in a semi-persistent CSI report.
  • receiving the precoder adjustment information includes receiving a difference between previous precoder adjustment information and new precoder adjustment information, and determining the precoder adjustment information based at least in part on the previous precoder adjustment information and the difference.
  • process 900 includes using a codebook that is based at least in part on frequency domain basis adjustments.
  • process 900 includes transmitting a radio resource control message indicating one or more CSI-RS ports that are candidates for frequency domain basis adjustment.
  • process 900 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 9. Additionally, or alternatively, two or more of the blocks of process 900 may be performed in parallel.
  • Fig. 10 is a block diagram of an example apparatus 1000 for wireless communication.
  • the apparatus 1000 may be a UE, or a UE may include the apparatus 1000.
  • the apparatus 1000 includes a reception component 1002 and a transmission component 1004, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the apparatus 1000 may communicate with another apparatus 1006 (such as a UE, a base station, or another wireless communication device) using the reception component 1002 and the transmission component 1004.
  • the apparatus 1000 may include a determining component 1008, among other examples.
  • the apparatus 1000 may be configured to perform one or more operations described herein in connection with Figs. 6-7. Additionally, or alternatively, the apparatus 1000 may be configured to perform one or more processes described herein, such as process 800 of Fig. 8, or a combination thereof.
  • the apparatus 1000 and/or one or more components shown in Fig. 10 may include one or more components of the UE described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 10 may be implemented within one or more components described above in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 1002 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1006.
  • the reception component 1002 may provide received communications to one or more other components of the apparatus 1000.
  • the reception component 1002 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1006.
  • the reception component 1002 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.
  • the transmission component 1004 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1006.
  • one or more other components of the apparatus 1006 may generate communications and may provide the generated communications to the transmission component 1004 for transmission to the apparatus 1006.
  • the transmission component 1004 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1006.
  • the transmission component 1004 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2. In some aspects, the transmission component 1004 may be collocated with the reception component 1002 in a transceiver.
  • the reception component 1002 may receive, from the apparatus 1006, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded.
  • the determining component 1008 may determine precoder adjustment information based at least in part on measuring the first set of CSI-RSs and the second set of CSI-RSs and comparing first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs.
  • the transmission component 1004 may transmit the precoder adjustment information to the apparatus 1006 based at least in part on a result of comparing the first measurement results and the second measurement results.
  • Fig. 10 The number and arrangement of components shown in Fig. 10 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 10. Furthermore, two or more components shown in Fig. 10 may be implemented within a single component, or a single component shown in Fig. 10 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 10 may perform one or more functions described as being performed by another set of components shown in Fig. 10.
  • Fig. 11 is a block diagram of an example apparatus 1100 for wireless communication.
  • the apparatus 1100 may be a base station, or a base station may include the apparatus 1100.
  • the apparatus 1100 includes a reception component 1102 and a transmission component 1104, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the apparatus 1100 may communicate with another apparatus 1106 (such as a UE, a base station, or another wireless communication device) using the reception component 1102 and the transmission component 1104.
  • the apparatus 1100 may include one or more of a precoding component 1108, among other examples.
  • the apparatus 1100 may be configured to perform one or more operations described herein in connection with Figs. 6-7. Additionally, or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as process 900 of Fig. 9, or a combination thereof.
  • the apparatus 1100 and/or one or more components shown in Fig. 11 may include one or more components of the base station described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 11 may be implemented within one or more components described above in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 1102 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1106.
  • the reception component 1102 may provide received communications to one or more other components of the apparatus 1100.
  • the reception component 1102 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1106.
  • the reception component 1102 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the 11 described above in connection with Fig. 2.
  • the transmission component 1104 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1106.
  • one or more other components of the apparatus 1106 may generate communications and may provide the generated communications to the transmission component 1104 for transmission to the apparatus 1106.
  • the transmission component 1104 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1106.
  • the transmission component 1104 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with Fig. 2. In some aspects, the transmission component 1104 may be collocated with the reception component 1102 in a transceiver.
  • the transmission component 1104 may transmit, to the apparatus 1106, a first set of CSI-RSs that are spatial domain precoded and not frequency domain precoded, and a second set of CSI-RSs that are spatial and frequency domain precoded.
  • the reception component 1102 may receive precoder adjustment information that is based at least in part on first measurement results of the first set of CSI-RSs and second measurement results of the second set of CSI-RSs.
  • the precoding component 1108 may precode communications to the apparatus 1106 based at least in part on the precoder adjustment information.
  • Fig. 11 The number and arrangement of components shown in Fig. 11 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 11. Furthermore, two or more components shown in Fig. 11 may be implemented within a single component, or a single component shown in Fig. 11 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 11 may perform one or more functions described as being performed by another set of components shown in Fig. 11.
  • the term “component” is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware, firmware, and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to specific software code-it being understood that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “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) .
  • the phrase “only one” or similar language is used.
  • the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms.
  • the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.
  • the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .

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

Abstract

Divers aspects de la présente divulgation portent, de manière générale, sur la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut recevoir, en provenance d'une station de base, un premier ensemble de signaux de référence d'informations d'état de canal (CSI-RS) qui sont précodés dans le domaine spatial et non précodés dans le domaine fréquentiel, et un second ensemble de CSI-RS qui sont précodés dans le domaine spatial et fréquentiel. L'UE peut déterminer des informations de réglage de précodeur sur la base, au moins en partie, de la mesure du premier ensemble de CSI-RS et du second ensemble de CSI-RS et de la comparaison de premiers résultats de mesure du premier ensemble de CSI-RS et de seconds résultats de mesure du second ensemble de CSI-RS. L'UE peut transmettre les informations de réglage de précodeur à la station de base sur la base, au moins en partie, du résultat de la comparaison des premiers résultats de mesure et des seconds résultats de mesure. La divulgation concerne également de nombreux autres aspects.
PCT/CN2020/096247 2020-06-16 2020-06-16 Réglages de base de domaine de fréquence pour rapport d'informations d'état de canal WO2021253205A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024007957A1 (fr) * 2022-07-05 2024-01-11 中国移动通信有限公司研究院 Procédé et appareil de renvoi d'informations csi, dispositif et support de stockage lisible
WO2024101742A1 (fr) * 2022-11-10 2024-05-16 Samsung Electronics Co., Ltd. Procédé et appareil de rapport de csi dans un système de communication sans fil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107925457A (zh) * 2015-04-08 2018-04-17 株式会社Ntt都科摩 用于确定预编码矩阵的基站、用户装置和方法
WO2018169635A2 (fr) * 2017-03-13 2018-09-20 Qualcomm Incorporated Techniques et appareils de détermination de précodeur de liaison montante à l'aide de signaux de référence de liaison descendante ou de détermination de précodeur de liaison descendante à l'aide de signaux de référence de liaison montante
CN110419175A (zh) * 2017-03-23 2019-11-05 高通股份有限公司 用于更高分辨率信道状态信息（csi）的差分csi报告

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107925457A (zh) * 2015-04-08 2018-04-17 株式会社Ntt都科摩 用于确定预编码矩阵的基站、用户装置和方法
WO2018169635A2 (fr) * 2017-03-13 2018-09-20 Qualcomm Incorporated Techniques et appareils de détermination de précodeur de liaison montante à l'aide de signaux de référence de liaison descendante ou de détermination de précodeur de liaison descendante à l'aide de signaux de référence de liaison montante
CN110419175A (zh) * 2017-03-23 2019-11-05 高通股份有限公司 用于更高分辨率信道状态信息（csi）的差分csi报告

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024007957A1 (fr) * 2022-07-05 2024-01-11 中国移动通信有限公司研究院 Procédé et appareil de renvoi d'informations csi, dispositif et support de stockage lisible
WO2024101742A1 (fr) * 2022-11-10 2024-05-16 Samsung Electronics Co., Ltd. Procédé et appareil de rapport de csi dans un système de communication sans fil

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