WO2020063470A1 - Procédé de réception et de rétroaction d'informations d'état de canal, dispositif côté réseau et terminal - Google Patents

Procédé de réception et de rétroaction d'informations d'état de canal, dispositif côté réseau et terminal Download PDF

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Publication number
WO2020063470A1
WO2020063470A1 PCT/CN2019/106930 CN2019106930W WO2020063470A1 WO 2020063470 A1 WO2020063470 A1 WO 2020063470A1 CN 2019106930 W CN2019106930 W CN 2019106930W WO 2020063470 A1 WO2020063470 A1 WO 2020063470A1
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Prior art keywords
feedback
codebook
type
state information
channel state
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PCT/CN2019/106930
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English (en)
Chinese (zh)
Inventor
李辉
高秋彬
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电信科学技术研究院有限公司
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Publication of WO2020063470A1 publication Critical patent/WO2020063470A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • 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
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a method for receiving channel state information, a method for feedback, a network-side device, and a terminal.
  • the terminal calculates channel state information (Channel State Information) through downlink channel measurement.
  • the CSI includes: rank indication (RI) / precoding matrix indicator (PMI) / channel quality indicator (CQI), and may also include CRI (Channel State Information Reference Signal (Channel StateStateInformation) Reference Signal (CSI-RS) resource indication).
  • RI rank indication
  • PMI precoding matrix indicator
  • CQI channel quality indicator
  • CRI Channel State Information Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • the base station needs to allocate uplink channel resources for the terminal to report CSI.
  • the CSI load reported by the terminal changes dynamically with different RIs.
  • a Type II (Type II) codebook is defined in the New Radio (NR) system, and its PMI overhead varies greatly with different RIs.
  • the uplink channel resources allocated by the base station may not be able to meet the complete CSI transmission.
  • part of the subband reporting method is adopted, that is, half of the subband PMI is discarded, so that the remaining CSI meets the code rate of the uplink channel resources agreed by the system. Claim.
  • the accuracy of the CSI decreases, which further affects system performance.
  • the Type II (Type II) codebook is defined in the NR Rel-15 system, which is based on the linear combination of orthogonal beams, has a higher channel quantization accuracy, but has a large feedback overhead.
  • the subsequent version of the NR system further introduced a low-overhead Type II codebook.
  • This low-overhead TypeII codebook has a low feedback overhead on the one hand, and can guarantee a certain CSI feedback accuracy.
  • the existing Rel-15 TypeII codebook and some subband feedback there is currently no corresponding solution on how to configure and use the low-overhead TypeII codebook.
  • the purpose of this disclosure is to provide a method for receiving channel state information, a feedback method, a network-side device, and a terminal, to solve the problem of how to configure The problem of using low overhead Type II codebooks.
  • some embodiments of the present disclosure provide a method for receiving channel state information, which is applied to a network-side device, including:
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the method further includes:
  • the parameters of the codebook include: parameters of the first type II codebook and / or parameters of the second type II codebook.
  • the method further includes:
  • the feedback manner for determining the channel state information includes:
  • the feedback mode of the channel state information is determined according to a priority or a feedback order of different or configured different feedback modes and an allocated uplink resource.
  • the feedback manner for determining the channel state information includes:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • some embodiments of the present disclosure provide a method for feeding back channel state information, which is applied to a terminal and includes:
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the method further includes:
  • Parameters of a codebook used for receiving feedback of channel state information configured by a network-side device include: parameters of a first type II codebook and / or parameters of a second type II codebook.
  • the method further includes:
  • determining the feedback mode of the channel state information according to the allocated uplink resources includes:
  • a feedback mode of the channel state information is determined.
  • determining the feedback mode of the channel state information according to the allocated uplink resources includes:
  • the method further includes:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • some embodiments of the present disclosure provide a network-side device, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor;
  • the processor is configured to read a program in a memory and execute the following processes:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the processor is further configured to:
  • the parameters of the codebook include: parameters of the first type II codebook and / or parameters of the second type II codebook.
  • the processor is further configured to:
  • the processor is further configured to:
  • the feedback mode of the channel state information is determined according to a priority or a feedback order of different or configured different feedback modes and an allocated uplink resource.
  • the transceiver is further used for:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • some embodiments of the present disclosure provide an apparatus for receiving channel state information, which is applied to a network-side device and includes:
  • a resource allocation module configured to allocate uplink resources for channel state information feedback to the terminal
  • a first receiving module configured to receive channel state information fed back by the terminal on the allocated uplink resources, and determine a feedback mode of the channel state information
  • the feedback mode includes any one of the following:
  • some embodiments of the present disclosure provide a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the channel state as described above is implemented. Steps of the method of receiving information.
  • a terminal including: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor; To read the program in the memory, perform the following process:
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the processor is further configured to receive parameters of a codebook used for receiving feedback of channel state information configured by a network-side device; the parameters of the codebook include: parameters of a first type II codebook and / or a second Parameters of type II codebook.
  • the processor is further configured to:
  • the processor is further configured to:
  • the processor is further configured to:
  • a feedback mode of the channel state information is determined.
  • the processor is further configured to:
  • the processor is further configured to:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • some embodiments of the present disclosure provide a feedback device for channel state information, which is applied to a terminal and includes:
  • An uplink resource determination module configured to determine an uplink resource allocated by a network-side device for feedback of channel state information
  • a feedback mode determining module configured to determine a feedback mode of the channel state information according to the allocated uplink resources
  • a first sending module configured to send the channel state information determined by using the determined feedback mode to the network-side device on the allocated uplink resources
  • the feedback mode includes any one of the following:
  • some embodiments of the present disclosure provide a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the channel state as described above is implemented. Steps of information feedback method.
  • the terminal by allocating an uplink resource for channel state information feedback to a terminal, receiving channel state information fed back by the terminal on the allocated uplink resource, and determining the channel state information.
  • a feedback method wherein the feedback method includes feedback based on the first type II codebook; and any feedback based on the second type II codebook, so that the terminal can flexibly switch between different types according to the uplink resources allocated by the network-side device And perform channel state information feedback to ensure better channel state information feedback under given uplink resources, and solve the problem of how to configure and use a low-overhead Type II codebook.
  • FIG. 1 is a schematic flowchart of a method for receiving channel state information according to some embodiments of the present disclosure
  • FIG. 2 is a schematic flowchart of a channel state information feedback method according to some embodiments of the present disclosure
  • FIG. 3 is a structural block diagram of a network-side device according to some embodiments of the present disclosure.
  • FIG. 4 is a schematic block diagram of a device for receiving channel state information according to some embodiments of the present disclosure
  • FIG. 5 is a structural block diagram of a terminal according to some embodiments of the present disclosure.
  • FIG. 6 is a schematic block diagram of a channel state information feedback device according to some embodiments of the present disclosure.
  • some embodiments of the present disclosure provide a method for receiving channel state information, which is applied to a network-side device and includes:
  • Step 101 Allocate uplink resources for channel state information feedback to the terminal
  • Step 102 receiving channel state information fed back by the terminal on the allocated uplink resources, and determining a feedback mode of the channel state information;
  • the feedback method includes any of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the network-side device may decode the channel state information according to a feedback mode of the channel state information.
  • a method for receiving channel state information by allocating an uplink resource for channel state information feedback to a terminal, receiving channel state information fed back by the terminal on the allocated uplink resource, and determining the channel A feedback method for status information, where the feedback method includes feedback based on the first type II codebook; feedback based on the second type II codebook makes the terminal flexible according to the uplink resources allocated by the network-side device Switching between different types of codebooks and performing channel state information feedback, thereby ensuring better channel state information feedback under given uplink resources, and solving the problem of how to configure and use low-overhead TypeII codebooks.
  • the method may further include the following steps:
  • the parameters of the codebook include: parameters of the first type II codebook and / or parameters of the second type II codebook.
  • the method may further include the following steps:
  • the priority or feedback order of different feedback methods can be predefined by the system.
  • the system predefined terminals fall back in order to perform CSI calculation and feedback according to the feedback order of the subbands of the Rel-15 TypeII codebook, the low-overhead TypeII codebook, and the Rel-15TypeII codebook.
  • the priority or feedback order of different feedback methods can be determined according to the feedback accuracy of the codebook and the size of the overhead of the codebook.
  • determining the feedback mode of the channel state information in step 102 may further include the following steps:
  • the feedback mode of the channel state information is determined according to a priority or a feedback order of different or configured different feedback modes and an allocated uplink resource.
  • the feedback manner of determining the channel state information in step 102 may further include the following steps:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • the first type II codebook includes: Rel-15 TypeII codebook.
  • the second type II codebook includes: a low-overhead TypeII codebook.
  • a method for receiving channel state information by allocating an uplink resource for channel state information feedback to a terminal, receiving channel state information fed back by the terminal on the allocated uplink resource, and determining the channel State information feedback method, wherein the feedback method includes feedback based on the first type II codebook; feedback based on the second type II codebook; complete feedback based on the first type II codebook; based on the first type II code Part of the subband feedback of this version; any of the complete feedback based on the second type II codebook and the non-complete feedback based on the second type II codebook, allowing the terminal to flexibly switch between different types according to the uplink resources allocated by the network-side device Codebook and channel state information feedback, so as to ensure better channel state information feedback under given uplink resources, and solve the existing Rel-15 TypeII codebook and some of its subband feedback. In this case, how to configure and use a low-overhead Type II codebook.
  • some embodiments of the present disclosure further provide a method for feeding back channel state information, which is applied to a terminal and includes:
  • Step 201 Determine uplink resources allocated by the network-side device for channel state information feedback
  • Step 202 Determine a feedback mode of the channel state information according to the allocated uplink resources.
  • the feedback method includes any of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • Step 203 Send the channel state information determined by using the determined feedback mode to the network-side device on the allocated uplink resources.
  • the terminal may determine the channel state information according to the feedback mode of the channel state information.
  • the channel state information feedback method determines an uplink resource allocated for channel state information feedback by a network-side device; determines a feedback mode of the channel state information according to the allocated uplink resource; Sending the channel state information determined by using the determined feedback mode to the network-side device on the allocated uplink resource, wherein the feedback mode includes feedback based on the first type II codebook; feedback based on the second type II codebook Any of these, so that the terminal can flexibly switch between different types of codebooks and perform channel state information feedback according to the uplink resources allocated by the network-side device, thereby ensuring that a better channel is achieved under the given uplink resources
  • the status information feedback solves the problem of how to configure and use the low-overhead Type II codebook.
  • the method may further include the following steps:
  • Parameters of a codebook used for receiving feedback of channel state information configured by a network-side device include: parameters of a first type II codebook and / or parameters of a second type II codebook.
  • the method may further include the following steps:
  • the priority or feedback order of different feedback methods can be predefined by the system.
  • the predefined terminals of the system fall back in order to perform CSI calculation and feedback according to the feedback order of the subbands of the Rel-15 TypeII codebook, the low-overhead TypeII codebook, and the Rel-15TypeII codebook.
  • the priority or feedback order of different feedback methods can be determined according to the feedback accuracy of the codebook and the size of the overhead of the codebook.
  • step 202 may include the following steps:
  • a feedback mode of the channel state information is determined.
  • this step it is preferable to determine a feedback cost of the channel state information according to the calculated channel state information; and determine a feedback mode of the channel state information according to the feedback cost and a predetermined uplink resource code rate requirement of the system.
  • the channel status For example, if the feedback overhead reaches a predetermined uplink resource code rate requirement of the system, determine the channel status
  • step 202 may include the following steps:
  • the method may further include the following steps:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • the channel state information feedback method determines an uplink resource allocated for channel state information feedback by a network-side device; determines a feedback mode of the channel state information according to the allocated uplink resource; Sending the channel state information determined by using the determined feedback mode to the network-side device on the allocated uplink resource, wherein the feedback mode includes feedback based on the first type II codebook; feedback based on the second type II codebook Any of these, so that the terminal can flexibly switch between different types of codebooks and perform channel state information feedback according to the uplink resources allocated by the network-side device, thereby ensuring that a better channel is achieved under the given uplink resources
  • the status information feedback solves the problem of how to configure and use the low-overhead Type II codebook.
  • Example 1 The system pre-defined terminal rolls back in order to perform CSI calculation and feedback according to the priority or feedback order of the subband feedback methods of the Rel-15 TypeII codebook, low-overhead TypeII codebook, and Rel-15TypeII codebook.
  • the base station configures the terminal to use the Type II codebook in the Rel-15 version for CSI feedback, and allocates uplink resources to the terminal.
  • the terminal uses this Type II codebook to perform CSI calculation and determines the CSI feedback overhead.
  • the low-cost Type II codebook is used for CSI calculation. .
  • the terminal determines that the corresponding CSI feedback mode is a low-overhead Type II codebook, and feeds this CSI back to the base station.
  • the base station receives uplink CSI and determines the CSI overhead according to the information in the CSI.
  • the CSI information can be divided into two parts.
  • the overhead of the first part is fixed, and the overhead of the second part can be determined according to the contents of the first part.
  • the base station can determine the CSI by decoding the information in the first part of the CSI. Full overhead.
  • the base station determines the corresponding CSI feedback mode as a low-overhead Type II codebook according to the determined CSI overhead, the code rate of the uplink resource agreed by the system, and the system's predefined priority or feedback order. In this way, the base station can complete decoding of the complete CSI.
  • Example 2 The predefined terminals of the system fall back to perform CSI calculation and feedback according to the priority or feedback order of the subband feedback methods of the Rel-15 TypeII codebook, the low-overhead TypeII codebook, and the Rel-15TypeII codebook.
  • the base station configures Rel-15 TypeII codebook parameters and low-overhead TypeII codebook parameters for the terminal to perform CSI feedback, and allocates uplink resources to the terminal.
  • the terminal first uses the Rel-15 TypeII codebook to perform CSI calculation according to the priority or the feedback order, and determines the CSI feedback overhead.
  • the low-overhead Type II codebook is used for CSI calculation based on the system's predefined priority or feedback order. At this time, The low-overhead Type II codebook uses the codebook parameters configured by the base station.
  • the receiving process of the base station is similar to that in Example 1, and is not repeated here.
  • Example 3 First, the base station configures the terminal with Rel-15 TypeII codebook parameters and low-overhead TypeII codebook parameters for CSI feedback, and allocates uplink resources to the terminal.
  • the terminal first uses the Rel-15 TypeII codebook to perform CSI calculation and determines the CSI feedback overhead. If the feedback overhead cannot meet the code rate requirement of the uplink resource and cannot be transmitted completely on this uplink resource, then a low-overhead Type II codebook is used for CSI calculation. At this time, the low-overhead Type II codebook uses the codebook configured by the base station. parameter.
  • the terminal further selects one of the low-overhead Type II codebook and Rel-15 TypeII codebook subband feedback as the CSI type information .
  • this CSI type information can be determined according to the channel characteristics estimated by the terminal. For example, if the frequency selectivity of the channel is good, the lower-band Rel-15 TypeII codebook part subband feedback is used as the CSI feedback. And feedback their corresponding CSI.
  • the terminal indicates the feedback mode of the CSI to the base station, and the number of bits occupied by the indication information of the CSI feedback mode may be 1 bit or 2 bits. If it is 1 bit, you can use 0 and 1 to indicate Rel-15 TypeII codebook and low-overhead TypeII codebook respectively; if it is 2 bit, you can indicate the above three feedback methods.
  • the base station receives the CSI feedback mode and CSI feedback fed back by the terminal, and decodes the CSI according to the indication of the CSI feedback mode.
  • an embodiment of the present disclosure further provides a network-side device, where the network-side device includes a transceiver, a memory, a processor, and a processor stored on the memory and operable on the processor.
  • a computer program said processor being used to read a program in a memory, performing the following processes:
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 300 and various circuits of the memory represented by the memory 320 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, so they are not described further herein.
  • the bus interface provides an interface.
  • the transceiver 310 may be multiple elements, including a transmitter and a transceiver, providing a unit for communicating with various other devices over a transmission medium.
  • the processor 300 is responsible for managing the bus architecture and general processing, and the memory 320 may store data used by the processor 300 when performing operations.
  • the processor 300 is further configured to:
  • the processor is further configured to:
  • the feedback mode of the channel state information is determined according to the priority or feedback order of different or configured different feedback modes and the size of the allocated uplink resources.
  • the processor 300 is further configured to:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • an embodiment of the present disclosure further provides a device for receiving channel state information, which is applied to a network-side device and includes:
  • a resource allocation module 401 configured to allocate an uplink resource for channel state information feedback to a terminal
  • a first receiving module 402 configured to receive channel state information fed back by the terminal on the allocated uplink resources, and determine a feedback mode of the channel state information
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the network-side device further includes:
  • a first configuration module configured to configure parameters of a codebook used for feedback of channel state information for a terminal; the parameters of the codebook include: parameters of a first type II codebook and / or parameters of a second type II codebook .
  • the network-side device further includes:
  • Pre-defined module for pre-defining the priority or feedback order of different feedback methods.
  • the second configuration module is configured to configure a priority or a feedback order of different feedback modes for the terminal.
  • the first receiving module 402 includes:
  • the feedback mode determining unit is configured to determine a feedback mode of the channel state information according to a priority or a feedback order of different or configured different feedback modes and an allocated uplink resource.
  • the first receiving module 402 includes:
  • the receiving unit is configured to receive instruction information sent by the terminal, where the instruction information is used to indicate a feedback manner of the channel state information.
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • the network-side device of some embodiments of the present disclosure allocates uplink resources for channel state information feedback to a terminal through a resource allocation module, and a first receiving module receives channel state information fed back by the terminal on the allocated uplink resources, and Determining the feedback mode of the channel state information, so that the terminal can flexibly switch between different types of codebooks and perform channel state information feedback according to the uplink resources allocated by the network-side device, thereby ensuring better performance under the given uplink resources
  • the feedback of the channel state information solves the problem of how to configure and use the low-overhead Type II codebook.
  • an embodiment of the present disclosure further provides a terminal including: a memory 520, a processor 500, a transceiver 510, a bus interface, and a computer program stored in the memory 520 and executable on the processor 500
  • the processor 500 is configured to read a program in the memory 520 and execute the following processes:
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 500 and various circuits of the memory represented by the memory 520 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, so they are not described further herein.
  • the bus interface provides an interface.
  • the transceiver 510 may be multiple elements, including a transmitter and a transceiver, providing a unit for communicating with various other devices over a transmission medium.
  • the user interface 530 may also be an interface capable of externally connecting and connecting the required devices.
  • the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 when performing operations.
  • the processor 500 is further configured to: receive parameters of a codebook used for feedback of channel state information configured by a network-side device; the parameters of the codebook include: parameters of a first type II codebook and / Or a second type II codebook parameter.
  • processor 500 is further configured to:
  • the processor 500 is further configured to:
  • processor 500 is further configured to:
  • a feedback mode of the channel state information is determined.
  • processor 500 is further configured to:
  • processor 500 is further configured to:
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • an embodiment of the present disclosure further provides a feedback device for channel state information, which is applied to a terminal and includes:
  • An uplink resource determination module 601, configured to determine an uplink resource allocated by a network-side device for feedback of channel state information
  • a first sending module 603, configured to send the channel state information determined by using the determined feedback mode to the network-side device on the allocated uplink resources;
  • the feedback mode includes any one of the following:
  • the feedback based on the first type II codebook includes:
  • Partial subband feedback based on the first type II codebook.
  • the feedback based on the second type II codebook includes:
  • the terminal further includes:
  • a second receiving module configured to receive parameters of a codebook used for feedback of channel state information configured by a network-side device; the parameters of the codebook include: parameters of a first type II codebook and / or second type II codes This parameter.
  • the terminal further includes:
  • a third receiving module configured to receive priorities or feedback sequences of different feedback modes configured by a network-side device
  • the obtaining module is used to obtain a predetermined priority or a feedback order of different feedback methods.
  • the feedback mode determination module 602 includes:
  • a computing unit configured to calculate channel state information according to a priority or a feedback order of different feedback modes configured or predefined by a network side device,
  • the first feedback mode determining unit is configured to determine a feedback mode of the channel state information according to the calculated channel state information.
  • the feedback mode determination module 602 includes:
  • a second feedback mode determining unit is configured to determine a feedback mode of the channel state information according to the allocated uplink resources and the quality of the channel state information.
  • the terminal further includes:
  • a second sending module is configured to send instruction information to a network-side device, where the instruction information is used to indicate a feedback manner of the channel state information.
  • the overhead of the second type II codebook is lower than the overhead of the first type II codebook.
  • the terminal of some embodiments of the present disclosure determines an uplink resource for channel state information feedback allocated by a network-side device through an uplink resource determination module; the feedback mode determination module determines a feedback mode of the channel state information according to the allocated uplink resources.
  • the first sending module sends the channel state information determined by the determined feedback mode to the network-side device on the allocated uplink resource, so that the terminal flexibly switches different types of codes according to the uplink resource allocated by the network-side device
  • channel state information feedback is performed to ensure better channel state information feedback under the condition of a given uplink resource, and the problem of how to configure and use a low-overhead Type II codebook is solved.

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

Abstract

La présente invention concerne des procédés de réception et de rétroaction d'informations d'état de canal, un dispositif côté réseau et un terminal ; le procédé d'acquisition d'informations d'état de canal tel que décrit dans la présente invention comprend les étapes consistant à : attribuer des ressources de liaison montante qui sont utilisées pour une rétroaction d'informations d'état de canal à un terminal ; recevoir des informations d'état de canal renvoyées par le terminal sur les ressources de liaison montante attribuées et déterminer un mode de rétroaction pour les informations d'état de canal.
PCT/CN2019/106930 2018-09-27 2019-09-20 Procédé de réception et de rétroaction d'informations d'état de canal, dispositif côté réseau et terminal WO2020063470A1 (fr)

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US20240039599A1 (en) * 2022-08-01 2024-02-01 Qualcomm Incorporated Multiple codebook channel state information report prioritization

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