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WO2020030112A1 - Procédé et appareil de transmission de données - Google Patents

Procédé et appareil de transmission de données Download PDF

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Publication number
WO2020030112A1
WO2020030112A1 PCT/CN2019/099988 CN2019099988W WO2020030112A1 WO 2020030112 A1 WO2020030112 A1 WO 2020030112A1 CN 2019099988 W CN2019099988 W CN 2019099988W WO 2020030112 A1 WO2020030112 A1 WO 2020030112A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
layers
pdsch
terminal device
equal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/099988
Other languages
English (en)
Chinese (zh)
Inventor
黄雯雯
花梦
铁晓磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201910028357.3A external-priority patent/CN110831130B/zh
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP19847169.0A priority Critical patent/EP3826370B1/fr
Publication of WO2020030112A1 publication Critical patent/WO2020030112A1/fr
Priority to US17/172,080 priority patent/US12016043B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a data transmission method and device.
  • 3GPP Release 16 proposed to optimize the power consumption of terminal equipment in New Radio (NR).
  • NR New Radio
  • the number of antennas affects the RF power consumption of terminal equipment. The more antennas a device operates, the greater the RF power consumption.
  • the terminal device can report the maximum number of physical downlink shared channel (PDSCH) layers to the network device.
  • the maximum number of layers can be 2, 4, or 8.
  • the number of layers for network device scheduling PDSCH cannot exceed the terminal.
  • Network equipment configures dedicated demodulation reference signals (DMRS) parameters for terminal equipment through radio resource control (RRC) signaling.
  • DMRS include DMRS type and DMRS maximum orthogonal frequency division multiplexing. (Orthogonal Frequency Division Multiplexing, OFDM) symbols and other parameters, these parameters correspond to a group of antenna port configuration, different parameters correspond to different antenna port configurations, in NR the PDSCH antenna port and the number of layers corresponds one-to-one.
  • the network device When the network device sends data to the terminal device, the network device first indicates downlink scheduling information and a value for indicating the antenna port (layer number) to the terminal device through downlink control information (DCI).
  • the terminal device receives the PDSCH.
  • the number of antennas must be greater than or equal to the number of layers in the PDSCH.
  • the antenna port configuration includes the corresponding relationship between the number and the antenna port (number of layers).
  • the downlink scheduling information includes PDSCH time / frequency domain resource allocation information, and the time domain resource allocation information refers to a scheduled PDSCH start position and length.
  • the network device sends the DCI through a physical downlink control channel (Physical downlink control channel, PDCCH).
  • PDCCH Physical downlink control channel
  • the terminal device needs to complete DCI decoding to know the number of PDSCH layers to be scheduled.
  • DCI decoding that is, the network device sends PDSCH and PDCCH to the terminal device at the same time.
  • the data sent by the network device through the PDSCH must be buffered.
  • the terminal device is not yet sure of the number of PDCSH layers scheduled by the network device and can only buffer the data according to the larger number of receiving antennas.
  • the PDSCH scheduled by DCI is 1. Layer, but at this time the terminal equipment must use 4 receiving antennas to buffer data. The number of antennas affects radio frequency power consumption. When a terminal device turns on multiple receiving antennas at the same time, the radio frequency power consumption of the terminal device is wasted.
  • the present application provides a data transmission method and device, which can save radio frequency power consumption of a terminal device.
  • the present application provides a data transmission method, including:
  • Receive first downlink control information DCI sent by a network device includes a number of layers for transmitting first data through a physical downlink shared channel PDSCH, and under a first condition, the number of layers for the first data is less than or equal to N1; under the second condition, the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, N2 is the maximum number of layers of data transmitted through the PDSCH supported by the terminal device, and N1 is a positive integer;
  • the first DCI when the network device has data to send, the first DCI is first sent to the terminal device.
  • the first DCI includes the number of layers for transmitting the first data through the PDSCH.
  • the first data The number of layers is less than or equal to N1.
  • the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, and N2 is the maximum number of layers supported by the terminal device for transmitting data through PDSCH. Therefore, the terminal device is receiving
  • the network device sends the first data through the PDSCH under the first condition, fewer receiving antennas can be opened, which can save radio frequency power consumption of the terminal device.
  • the terminal device Under the second condition, when receiving the first data sent by the network device through the PDSCH, the terminal device can open more receiving antennas, and the receiving antenna can be dynamically adjusted, thereby saving radio frequency power consumption of the terminal device.
  • the first DCI further includes a time slot offset of the first data in time, where:
  • the slot offset is less than a preset value
  • the slot offset is greater than or equal to the preset value.
  • the method further includes:
  • No data sent through the PDSCH is received within the preset X time slots, and when the timer times out, the number of layers receiving the second data sent by the network device through the PDSCH is less than or equal to N1; or,
  • the timer restarts.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas by setting a timer, thereby saving End device power consumption.
  • the method further includes:
  • the second DCI is not received within the preset X time slots, and when the timer expires, the number of layers receiving the second data sent by the network device through the PDSCH is less than or equal to N1; or,
  • the timer re-times, where the second DCI includes the number of layers of the third data transmitted through the PDSCH.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas by setting a timer, thereby saving End device power consumption.
  • the timer restarts including:
  • the timer continues to count, and when the timer expires, the third data received by the network device through the PDSCH is received.
  • the number of layers of data is less than or equal to N1.
  • the timer restarts including:
  • the timer continues to count, and when the timer expires, the network device is received by the network device through the The number of layers of the third data sent by the PDSCH is less than or equal to N1.
  • the method further includes:
  • the preset threshold Is a positive integer.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas by setting the counting device, thereby saving End device power consumption.
  • the method further includes:
  • the terminal device can fall back to work with less than or equal to N1 receiving antennas through the instruction information of the network device, thereby Save power consumption of terminal equipment.
  • the method further includes:
  • the terminal device calculates the first channel quality information CQI under the first condition and the second CQI under the second condition according to the CSI-RS, and sends the first CQI and / or to the network device.
  • the second CQI solves the problem of how the terminal device reports the CQI to the network device when the receiving antenna is dynamically adjusted under different conditions, and the network device can obtain an accurate CQI, thereby determining the MCS of the data sent through the PDSCH according to the CQI.
  • the method further includes:
  • the time unit where the CSI-RS resource is located receives the first data sent by the network device, if the number of antenna ports configured in the CSI-RS resource is greater than N1, the number of layers of the first data is less than or equal to N2.
  • the present application provides a data transmission method, including:
  • Send first downlink control information DCI to a terminal device where the first DCI includes a number of layers for transmitting first data through a physical downlink shared channel PDSCH, and under a first condition, the number of layers for the first data is less than or equal to N1 ; Under the second condition, the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, N2 is a maximum number of layers of data supported by the terminal device for transmitting data through PDSCH, and N1 is a positive integer;
  • the first DCI when the network device has data to send, the first DCI is first sent to the terminal device.
  • the first DCI includes the number of layers for transmitting the first data through the PDSCH.
  • the first data The number of layers is less than or equal to N1.
  • the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, and N2 is the maximum number of layers supported by the terminal device for transmitting data through PDSCH.
  • the network device sends the first data through the PDSCH under the first condition, fewer receiving antennas can be opened, which can save radio frequency power consumption of the terminal device.
  • the terminal device Under the second condition, when receiving the first data sent by the network device through the PDSCH, the terminal device can open more receiving antennas, and the receiving antenna can be dynamically adjusted, thereby saving radio frequency power consumption of the terminal device.
  • the first DCI further includes a time slot offset of the first data in time, where:
  • the slot offset is less than a preset value
  • the slot offset is greater than or equal to the preset value.
  • the method further includes:
  • the timer restarts.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas by setting a timer, thereby saving End device power consumption.
  • the method further includes:
  • the second DCI is not sent to the terminal device within the preset X time slots, and when the timer expires, the number of layers for sending the second data to the terminal device through the PDSCH is less than or equal to N1; or ,
  • the timer is re-timed, where the second DCI includes the number of layers of the third data transmitted through the PDSCH.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas by setting a timer, thereby saving End device power consumption.
  • the timer restarts including:
  • the timer continues to count, and when the timer expires, third data is sent to the terminal device through the PDSCH.
  • the number of layers is less than or equal to N1.
  • the timer restarts including:
  • the timer continues to count, and when the timer expires, the terminal is notified to the terminal through the PDSCH.
  • the number of layers in which the device sends the third data is less than or equal to N1.
  • the method further includes:
  • the preset threshold is Positive integer.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, through the setting of the counting device, the terminal device can fall back to work with less than or equal to N1 receiving antennas, thereby saving End device power consumption.
  • the method further includes:
  • the terminal device can fall back to work with less than or equal to N1 receiving antennas through the instruction information of the network device, thereby Save power consumption of terminal equipment.
  • the method further includes:
  • the terminal device calculates the first channel quality information CQI under the first condition and the second CQI under the second condition according to the CSI-RS, and sends the first CQI and / or to the network device.
  • the second CQI solves the problem of how the terminal device reports the CQI to the network device when the receiving antenna is dynamically adjusted under different conditions, and the network device can obtain an accurate CQI, thereby determining the MCS of the data sent through the PDSCH according to the CQI.
  • the method further includes:
  • the number of antenna ports configured in the CSI-RS resource is greater than N1
  • the number of layers of the first data is less than or equal to N2.
  • the present application provides a terminal device, including:
  • a first receiving module is configured to receive first downlink control information DCI sent by a network device, where the first DCI includes a number of layers for transmitting first data through a physical downlink shared channel PDSCH.
  • the first DCI includes a number of layers for transmitting first data through a physical downlink shared channel PDSCH.
  • N1 the number of layers of data is less than or equal to N1
  • N2 the maximum number of layers of data transmitted through the PDSCH supported by the terminal device, N1 Is a positive integer
  • a second receiving module is configured to receive first data sent by the network device, and demodulate the first data according to the first DCI.
  • the first DCI further includes a time slot offset of the first data in time, where:
  • the slot offset is less than a preset value
  • the slot offset is greater than or equal to the preset value.
  • the terminal device further includes:
  • a first timing module configured to start a timer after the second receiving module receives first data sent by the network device and demodulate the first data according to the first DCI, and The time slot where the data is located starts to count;
  • the second receiving module does not receive data sent through the PDSCH within the preset X time slots, and when the timer times out, the second receiving module receives the network device sending through the PDSCH
  • the number of layers of the second data is less than or equal to N1; or,
  • the first timing module retimes the timer.
  • the terminal device further includes:
  • a second timing module configured to start a timer after the second receiving module receives the first data sent by the network device and demodulates the first data according to the first DCI, and DCI starts timing;
  • the second receiving module does not receive the second DCI within the preset X time slots.
  • the second receiving module receives the second data sent by the network device through the PDSCH. Is less than or equal to N1; or,
  • the timer is re-timed, wherein the second DCI includes the number of layers of the third data transmitted through the PDSCH. .
  • the first time counting module retimes the timer
  • the first timing module continues counting the timer, and when the timer times out, the second receiving module
  • the number of layers receiving the third data sent by the network device through the PDSCH is less than or equal to N1.
  • the second timing module re-times the timer
  • the second timing module continues counting the timer, and when the timer times out, all the The number of layers in which the second receiving module receives third data sent by the network device through the PDSCH is less than or equal to N1.
  • the second receiving module receives the network device
  • the number of layers of the third data sent by the PDSCH is less than or equal to N1, and the preset threshold is a positive integer.
  • the terminal device further includes:
  • a third receiving module configured to receive the first data sent by the network device after the second receiving module receives the first data sent by the network device and demodulate the first data according to the first DCI; And indication information indicating that the number of layers receiving second data sent by the network device through the PDSCH is less than or equal to N1.
  • the terminal device further includes:
  • a fourth receiving module configured to receive a channel state information reference signal CSI-RS sent by the network device
  • a processing module configured to calculate the first channel quality information CQI under the first condition and the second CQI under the second condition according to the CSI-RS, and send the first CQI and / or the first CQI to the network device Two CQI.
  • the first data sent by the network device in a time unit where the CSI-RS resource is located when receiving the first data sent by the network device in a time unit where the CSI-RS resource is located, if the number of antenna ports configured in the CSI-RS resource is greater than N1, the first data The number of layers is less than or equal to N2.
  • the present application provides a network device, including:
  • a first sending module configured to send first downlink control information DCI to a terminal device, where the first DCI includes a number of layers for transmitting first data through a physical downlink shared channel PDSCH, and under the first condition, the first data
  • the number of layers is less than or equal to N1; under the second condition, the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, N2 is the maximum number of layers supported by the terminal device for transmitting data through PDSCH, and N1 is Positive integer
  • a second sending module configured to send first data to the terminal device.
  • the first DCI further includes a time slot offset of the first data in time, where:
  • the slot offset is less than a preset value
  • the slot offset is greater than or equal to the preset value.
  • the network device further includes:
  • a first timing module configured to start a timer after the second sending module sends the first data to the terminal device, and start timing from the time slot where the first data is located;
  • the second sending module fails to send data to the terminal device through the PDSCH within the preset X time slots, and the timer expires, the second sending module sends the first to the terminal device through the PDSCH.
  • the number of data layers is less than or equal to N1; or,
  • the first timing module re-times the timer.
  • the network device further includes:
  • a second timing module configured to start a timer after the second sending module sends the first data to the terminal device, and start timing from the position where the first DCI is located;
  • the second sending module does not send the second DCI to the terminal device within the preset X time slots.
  • the second sending module sends the terminal device to the terminal device through the PDSCH.
  • the number of layers of the second data is less than or equal to N1; or
  • the second timing module re-times the timer, where the second DCI includes The number of layers of the third data transmitted by the PDSCH is described.
  • the first timing module retimes the timer
  • the first timing module continues counting the timer, and when the timer times out, the second sending module The number of layers that send third data to the terminal device through the PDSCH is less than or equal to N1.
  • the second timing module re-times the timer
  • the second timing module continues counting the timer, and when the timer times out, all the The second sending module sends the third data to the terminal device through the PDSCH in a number of layers less than or equal to N1
  • the second sending module when the number of times the second data layer is less than the second preset layer number is equal to a preset threshold, the second sending module sends the data to the PDSCH through the PDSCH.
  • the number of layers in which the terminal device sends the third data is less than or equal to N1, and the preset threshold is a positive integer.
  • the network device further includes:
  • a third sending module configured to send, after the second sending module sends the first data to the terminal device, the number of layers used to instruct the terminal device to send the second data to the terminal device through the PDSCH
  • the instruction information is less than or equal to N1.
  • the network device further includes:
  • a fourth sending module is configured to send a channel state information reference signal CSI-RS to the terminal device, and is used by the terminal device to calculate the first channel quality information CQI and the first channel quality information under the first condition according to the CSI-RS.
  • a receiving module configured to receive a first CQI and / or a second CQI sent by the terminal device.
  • the number of antenna ports configured in the CSI-RS resource is greater than N1
  • the The number of layers is less than or equal to N2.
  • the present application provides a data transmission method, including:
  • DCI Downlink control information DCI sent by a network device, where the DCI includes the number of layers that send data through the PDSCH;
  • the terminal device receives the PDSCH transmitted on the corresponding carrier or BWP.
  • the corresponding number of receiving antennas can be opened according to the configured maximum number of layers of PDSCH.
  • fewer receiving antennas can be opened, which can save the RF power consumption of the terminal device. .
  • the obtaining the maximum number of layers of the physical downlink shared channel PDSCH on the carrier or bandwidth part BWP includes:
  • carrier configuration information includes the maximum number of PDSCH layers of each carrier, or the carrier configuration information includes at least one PDSCH maximum layer number, and one PDSCH maximum layer number is used to indicate a group The maximum number of PDSCH layers of the carrier.
  • the BWP configuration information includes the maximum number of PDSCH layers on each BWP.
  • the BWP configuration information includes at least one maximum PDSCH layer.
  • One maximum PDSCH layer indicates a group. Maximum number of PDSCH layers on BWP;
  • the present application provides a data transmission method, including:
  • the terminal device receives the PDSCH transmitted on the corresponding carrier or BWP.
  • the corresponding number of receiving antennas can be opened according to the configured maximum number of layers of PDSCH.
  • fewer receiving antennas can be opened, which can save the RF power consumption of the terminal device. .
  • configuring the maximum number of layers of the physical downlink shared channel PDSCH on the carrier or bandwidth part BWP for the terminal device includes:
  • the carrier device or the BWP configuration information is used to configure the carrier or the maximum number of PDSCH layers on the BWP for the terminal device.
  • the carrier configuration information includes the maximum number of PDSCH layers of the carrier. Maximum number of layers, one PDSCH maximum layer is used to indicate the maximum number of PDSCH layers of a group of carriers, the BWP configuration information includes the maximum number of PDSCH layers on each BWP, or the BWP configuration information includes at least one PDSCH Maximum number of layers.
  • One PDSCH maximum layer number is used to indicate the maximum number of PDSCH layers on a group of BWPs.
  • the present application provides a terminal device, including:
  • An obtaining module configured to obtain a maximum number of layers of a physical downlink shared channel PDSCH on a carrier or a bandwidth part BWP;
  • a first receiving module configured to receive downlink control information DCI sent by a network device, where the DCI includes a number of layers for sending data through a PDSCH;
  • a second receiving module configured to receive data sent by the network device through a PDSCH on a target carrier or a target BWP, and demodulate the data according to the DCI, and the number of layers of the data is less than or equal to the target carrier or Maximum number of PDSCH layers on the target BWP.
  • the obtaining module is used for:
  • carrier configuration information includes the maximum number of PDSCH layers of each carrier, or the carrier configuration information includes at least one PDSCH maximum layer number, and one PDSCH maximum layer number is used to indicate a group The maximum number of PDSCH layers of the carrier.
  • the BWP configuration information includes the maximum number of PDSCH layers on each BWP.
  • the BWP configuration information includes at least one maximum PDSCH layer.
  • One maximum PDSCH layer indicates a group. Maximum number of PDSCH layers on BWP;
  • the present application provides a network device, including:
  • a configuration module configured to configure a maximum number of layers of a physical downlink shared channel PDSCH on a carrier or a bandwidth part BWP for a terminal device;
  • a first sending module configured to send downlink control information DCI to the terminal device, where the DCI includes a number of layers for sending data through a PDSCH;
  • the second sending module is configured to send data to the terminal device through the PDSCH on the target carrier or the target BWP, where the number of data layers is less than or equal to the maximum number of PDSCH layers on the target carrier or the target BWP.
  • the configuration module is configured to:
  • the carrier device or the BWP configuration information is used to configure the carrier or the maximum number of PDSCH layers on the BWP for the terminal device.
  • the carrier configuration information includes the maximum number of PDSCH layers of the carrier, or the carrier configuration information includes at least one PDSCH.
  • the maximum number of layers One PDSCH maximum layer number is used to indicate the maximum number of PDSCH layers of a group of carriers.
  • the BWP configuration information includes the maximum number of PDSCH layers on each BWP, or the BWP configuration information includes at least one PDSCH. Maximum number of layers.
  • One PDSCH maximum layer number is used to indicate the maximum number of PDSCH layers on a group of BWPs.
  • the present application provides a terminal device, including: a memory and a processor;
  • Memory for storing program instructions
  • the processor is configured to call a program instruction in the memory to execute the data transmission method in the first aspect and any possible design of the first aspect or the fifth aspect and any possible design of the fifth aspect.
  • the present application provides a network device, including: a memory and a processor;
  • Memory for storing program instructions
  • the processor is configured to call program instructions in the memory to execute the data transmission method in the second aspect and any one of the possible designs of the second aspect or the sixth aspect and any of the six possible designs in the sixth aspect.
  • the present application provides a readable storage medium that stores an execution instruction.
  • the terminal device executes the execution instruction, executes the first aspect and any of the first aspect.
  • a data transmission method in one possible design or in the fifth aspect and any one of the fifth possible designs.
  • the present application provides a readable storage medium that stores an execution instruction.
  • the network device executes any of the second aspect and the second aspect.
  • the present application provides a program product including an execution instruction, and the execution instruction is stored in a readable storage medium.
  • At least one processor of the terminal device may read the execution instruction from a readable storage medium, and the execution of the execution instruction by the at least one processor causes the terminal device to implement the first aspect and any possible design of the first aspect or the fifth aspect and The data transmission method in any possible design of the fifth aspect.
  • the present application provides a program product including an execution instruction, and the execution instruction is stored in a readable storage medium.
  • At least one processor of the network device may read the execution instruction from a readable storage medium, and the execution of the execution instruction by the at least one processor causes the network device to implement the second aspect and any possible design of the second aspect or the sixth aspect and A data transmission method in any possible design of the sixth aspect.
  • the present application provides a chip on which a computer program is stored, and when the computer program is executed by the chip, the first aspect, the second aspect, the fifth aspect, and the sixth aspect are implemented Or the methods in various possible implementation manners of the first aspect, the second aspect, the fifth aspect, and the sixth aspect.
  • FIG. 1 is a schematic diagram of a communication system architecture
  • FIG. 2 is an interaction flowchart of an embodiment of a data transmission method provided by this application
  • FIG. 5 is a schematic diagram of a process for a terminal device to fall back to a low power consumption state from a low power consumption state to a high power consumption state provided by the present application;
  • FIG. 6 is a flowchart of an embodiment of a data transmission method provided by this application.
  • FIG. 7 is a schematic structural diagram of an embodiment of a terminal device provided by this application.
  • FIG. 8 is a schematic structural diagram of an embodiment of a terminal device provided by this application.
  • FIG. 9 is a schematic structural diagram of an embodiment of a terminal device provided by this application.
  • FIG. 10 is a schematic structural diagram of an embodiment of a terminal device provided by this application.
  • FIG. 11 is a schematic structural diagram of an embodiment of a terminal device provided by this application.
  • FIG. 12 is a schematic structural diagram of an embodiment of a network device provided by this application.
  • FIG. 13 is a schematic structural diagram of an embodiment of a network device provided by this application.
  • FIG. 14 is a schematic structural diagram of an embodiment of a network device provided by this application.
  • 15 is a schematic structural diagram of an embodiment of a network device provided by this application.
  • FIG. 16 is a schematic structural diagram of an embodiment of a network device provided by this application.
  • FIG. 17 is a schematic structural diagram of an embodiment of a terminal device provided by this application.
  • FIG. 18 is a schematic structural diagram of an embodiment of a network device provided by this application.
  • FIG. 19 is a schematic structural diagram of another terminal device according to the present application.
  • FIG. 20 is a schematic structural diagram of another network device provided by the present application.
  • the embodiments of the present application can be applied to wireless communication systems.
  • the wireless communication systems mentioned in the embodiments of the present application include, but are not limited to: Narrowband Internet of Things (NB-IoT), Global Mobile Communication system (Global System for Mobile, Communications, GSM), Enhanced Data Rate GSM Evolution System (Enhanced Data Rate for GSM Evolution, EDGE), Wideband Code Division Multiple Access System (Wideband Code Division Multiple Access, WCDMA), Code Division Multiple Access 2000 system (Code Division Multiple Access) (CDMA2000), Time Division-Synchronization Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE) system, and the fifth generation of mobile communications (LTE the 5th Generation, Mobile Communication, 5G) system.
  • NB-IoT Narrowband Internet of Things
  • GSM Global System for Mobile, Communications
  • GSM Global System for Mobile, Communications
  • EDGE Enhanced Data Rate for GSM Evolution
  • WCDMA Wideband Code Division Multiple Access System
  • CDMA2000 Code Division Multiple Access 2000 system
  • TD-SCDMA
  • FIG. 1 is a schematic diagram of a communication system architecture.
  • the communication system of the present application may include a network device and a terminal device, and the network device and the terminal device communicate with each other.
  • the communication device involved in this application mainly includes a network device or a terminal device. among them,
  • Network device It can be a base station, or an access point, or an access network device, or it can refer to a device in the access network that communicates with a wireless terminal through one or more sectors on the air interface.
  • the network device can be used to convert the received air frames and IP packets to each other, and serve as a router between the wireless terminal and the rest of the access network, where the rest of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the network equipment can also coordinate the management of the attributes of the air interface.
  • the network device can be a Global System (Global System) of Mobile Communication (GSM) or a Code Division Multiple Access (CDMA) base station (Base Transceiver Station, BTS), or it can be a Broadband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) base stations (NodeB, NB) can also be evolved base stations (Evolutional NodeB, eNB or eNodeB) in Long Term Evolution (LTE), or relay stations or access Points, or base stations in future 5G networks, such as gNB, are not limited here.
  • GSM Global System
  • CDMA Code Division Multiple Access
  • BTS Base Transceiver Station
  • WCDMA Broadband Code Division Multiple Access
  • NodeB, NB can also be evolved base stations (Evolutional NodeB, eNB or eNodeB) in Long Term Evolution (LTE), or relay stations or access Points, or base stations in future 5G networks, such as gNB, are not limited here.
  • Terminal device It can be a wireless terminal or a wired terminal.
  • the wireless terminal can be a device that provides users with voice and / or other business data connectivity, a handheld device with a wireless connection function, or other processing equipment connected to a wireless modem. .
  • a wireless terminal can communicate with one or more core networks via a wireless access network.
  • the wireless terminal can be a mobile terminal, such as a mobile phone (also called a "cellular" phone) and a computer with a mobile terminal. For example, it can be portable, Pocket, handheld, computer-built or vehicle-mounted mobile devices that exchange languages and / or data with wireless access networks.
  • a wireless terminal can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, The access terminal (Access terminal), user terminal (User terminal), user agent (User agent), user equipment (User Device or User Equipment) are not limited here.
  • the terminal device In the prior art, during slot scheduling, the terminal device must buffer the data sent by the PDSCH through the PDSCH before completing the DCI decoding.
  • the terminal device is not yet sure of the number of PDSCH layers scheduled by the network device, and can only use the A large number of receiving antennas buffer the data, which will cause waste of radio frequency power consumption of the terminal device.
  • this application provides a data transmission method and device. By dynamically adjusting the receiving antenna, under the first condition, it can be turned on. Fewer receiving antennas can save radio frequency power consumption of terminal equipment.
  • FIG. 2 is an interaction flowchart of an embodiment of a data transmission method provided in this application.
  • the interaction between a terminal device and a network device is used as an example for description.
  • the method in this embodiment may include:
  • the network device sends a first DCI to the terminal device.
  • the first DCI includes the number of layers for transmitting the first data through the PDSCH.
  • the number of layers for the first data is less than or equal to N1.
  • the first The number of layers of a data is less than or equal to N2, N1 ⁇ N2, N2 is the maximum number of layers that the terminal device supports to transmit data through PDSCH, and N1 is a positive integer.
  • the first DCI is first sent to the terminal device through the PDCCH.
  • the first DCI includes the number of layers for transmitting the first data through the PDSCH, and the first DCI also includes PDSCH time domain resource allocation information.
  • the PDSCH time domain resource allocation information includes the time slot offset of the first data in time and the PDSCH start symbol S and length L.
  • the slot offset and start symbol reflect the scheduling delay.
  • the value of the number of layers of the first data is different under two different conditions. Under the first condition, the number of layers of the first data is less than or equal to N1.
  • the number of layers of the first data The number is less than or equal to N2, N1 ⁇ N2, and N2 is the maximum number of layers supported by the terminal device for transmitting data through the PDSCH.
  • N1 may be a preset value or a value configured by a network device.
  • N1 is equal to the number of antennas that the terminal device receives the DCI sent through the PDCCH.
  • the terminal device receives the first DCI sent by the network device.
  • the network device sends the first data to the terminal device.
  • the terminal device receives the first data sent by the network device, and demodulates the first data according to the first DCI.
  • the number of antennas when the terminal device receives the first data sent through the PDSCH must be greater than or equal to the number of layers of the first data.
  • the value of the number of layers of the first data is different under two different conditions. Under the first condition, the number of layers of the first data is less than or equal to N1, N1 ⁇ N2, where N2 is supported by the terminal device.
  • the maximum number of layers of data transmitted through PDSCH, the number of antennas when the terminal device receives the first data can not exceed N1, so that the terminal device can turn off other receiving antennas, reducing the radio frequency power consumption of the terminal device, at this time the terminal device is in Low power consumption and low throughput state; under the second condition, the number of layers of the first data is less than or equal to N2, the number of antennas for receiving the first data by the terminal device may be N2, and the terminal device enters a state of high throughput and high power consumption.
  • the first DCI further includes a time slot offset of the first data in time.
  • the time slot offset is less than a preset value.
  • the time slot offset is greater than or equal to a preset value.
  • the preset value is 1, when the number of layers of the first data is less than or equal to N1, the time slot offset is less than 1, and when the number of layers of the first data is changed from less than or equal to N1 to less than or equal to N2, the time slot offset is Greater than or equal to 1.
  • the slot offset is 0 during simultaneous slot scheduling, and the slot offset is greater than 0 during inter-slot scheduling.
  • the first condition may be any one of the following conditions: simultaneous slot scheduling, scheduling delay below a preset value, channel quality or signal-to-noise ratio below a preset value, and poor coverage, DCI does not carry scheduling information (for example, DCI does not carry downlink scheduling information) and so on.
  • the second condition may be any one of the following conditions: scheduling across slots, scheduling delay greater than a preset value, channel quality or signal-to-noise ratio higher than a preset value, good coverage, and DCI carrying scheduling information ( For example, DCI carries downlink scheduling information) and so on.
  • the following uses slot scheduling and cross-slot scheduling as examples.
  • slot scheduling the time when the network device sends the first data to the terminal device through the PDSCH and the time when the network device sends the first DCI to the terminal device is In the same time slot, the terminal device must buffer the first data sent by the network device through the PDSCH before completing the DCI decoding. The terminal device is not yet sure of the number of layers of the first data scheduled by the network device.
  • the number of layers of the first data is less than Or equal to N1, N1 ⁇ N2, the number of antennas when the terminal device receives the first data is less than the maximum number of layers N2 supported by the terminal device for transmitting data through PDSCH, the terminal device does not need to open N2 receiving antennas to receive the first data at the same time, reducing The radio frequency power consumption of the terminal equipment is reduced, and the terminal equipment is in a low power consumption state at this time. Therefore, the terminal device can turn off a part of the receiving antenna when the transmission rate is low, and only need to open fewer receiving antennas to receive data transmitted through the PDSCH, thereby reducing the radio frequency power consumption of the terminal device.
  • the scheduling delay needs to consider the time required for the terminal device to open the receiving antenna. Therefore, cross-slot scheduling is used, that is, the network The time when the device sends the first data to the terminal device through the PDSCH and the time when the network device sends the first DCI to the terminal device are not in the same time slot.
  • the number of layers of the first data is less than or equal to N2
  • the number of antennas for receiving the first data by the terminal device may be N2, and the terminal device enters a state of high throughput and high power consumption.
  • the network device does not send a scheduling DCI, that is, the network device does not send DCI or the DCI sent by the network device does not carry downlink scheduling information.
  • the terminal device is in the first condition. At this time, the terminal device uses N1 The receiving antenna receives and detects the PDCCH without having to turn on N2 receiving antennas at the same time, which reduces the radio frequency power consumption of the terminal device. At this time, the terminal device is in a low power consumption state.
  • the terminal device detects the DCI carrying the downlink scheduling information
  • the terminal device transitions to the second condition, that is, the N2 receiving antennas are turned on to receive the PDSCH. Before the terminal device falls back to the first condition, the terminal device can use the N2 receiving antennas. Receive and detect PDCCH.
  • the number of layers of the first data is less than or equal to N2, and the terminal device opens N2 receiving antennas to receive the first data of the network device.
  • the network device may not always send data.
  • the terminal device can fall back to work with less than or equal to N1 receiving antennas.
  • the method in this embodiment has the following four implementable modes:
  • the method in this embodiment may further include:
  • the terminal device starts a timer, and starts counting from the time slot where the first data is located.
  • the data sent by the network device through the PDSCH is not received within the preset X time slots.
  • the timer expires, the network device is received.
  • the number of layers of the second data sent by the PDSCH is less than or equal to N1, that is, the terminal device falls back to a low power consumption state.
  • X may be a preset value or a value configured through a network device, and a unit of X may be another time slot unit.
  • the network device also schedules the PDSCH according to low power consumption, that is, the network device starts timing from the time slot where the first data is located, and fails to send data to the terminal device through the PDSCH within the preset X time slots. Then the number of layers for sending the second data to the terminal device through the PDSCH is less than or equal to N1.
  • the timer restarts.
  • the network device sends the second data to the terminal device through the PDSCH within preset X time slots. That is, when scheduling occurs in X time slots, the timer re-times, and both the terminal device and the network device re-time.
  • a scheduling may occur in X timeslots as a burst of data.
  • the terminal device In order to save power, the terminal device must enter a low power state as soon as possible.
  • the first preset number of layers is equal to N1.
  • the first preset number of layers is limited here by way of example, and the timer is re-timed, that is, there is scheduling during the timer startup period, and the number of scheduled data layers is greater than the first.
  • the timers of the terminal equipment and the network equipment are re-counted after a preset number of layers, otherwise the timing continues;
  • the timer continues to count, and when the timer expires, the number of layers receiving the third data sent by the network device through the PDSCH is less than or equal to N1 That is, when the timer expires, the terminal device falls back to a low power state.
  • the network device must also schedule the PDSCH according to low power consumption, that is, the number of layers in which the network device sends third data to the terminal device through the PDSCH is less than or equal to N1.
  • the method in this embodiment may further include:
  • the terminal device starts a timer, and starts counting from the time slot where the first DCI is located.
  • the second DCI is not received within the preset X time slots.
  • the network device is received by the network device through the The number of layers of the second data sent by the PDSCH is less than or equal to N1, that is, the terminal device falls back to a low power consumption state.
  • the network device must also schedule PDSCH according to low power consumption, that is, the network device starts timing from the time slot where the first data is located, and does not send the second DCI to the terminal device within the preset X time slots.
  • the number of layers sending the second data to the terminal device through the PDSCH is less than or equal to N1.
  • the terminal device receives the second DCI in the preset X time slots, and then the timer re-times, where the second DCI includes the number of layers of the second data transmitted through the PDSCH.
  • the timer restarts. That is, when scheduling occurs in X time slots, the timer re-times, and both the terminal device and the network device re-time.
  • a scheduling may occur in the X time slots as a burst of data.
  • the terminal device In order to save power, the terminal device must enter a low power state as soon as possible.
  • the first preset number of layers for example, is equal to N1.
  • the first preset number of layers is defined here as an example, and the timer is re-counted, that is, there is scheduling during the timer startup period, and the scheduled data If the number of layers is greater than the first preset number of layers, the timers of the terminal device and the network device are re-timed; otherwise, the timer continues to count;
  • the timer continues to count, and when the timer expires, the layer receiving the third data sent by the network device through the PDSCH
  • the number is less than or equal to N1, that is, when the timer expires, the terminal device falls back to a low power consumption state.
  • the network device must also schedule the PDSCH according to low power consumption, that is, the number of layers in which the network device sends third data to the terminal device through the PDSCH is less than or equal to N1.
  • the method in this embodiment may further include:
  • the preset threshold is a positive integer.
  • the network device must also schedule the PDSCH according to low power consumption.
  • the PDSCH sends the third data to the terminal device through the PDSCH.
  • the number of layers is less than or equal to N1.
  • the terminal device and the network device can set a counter, the size of the counter is 5, that is, the preset threshold is 5.
  • the network device After the network device schedules the PDSCH and the terminal device opens the N2 receiving antennas to receive data, the network device still has data to the terminal device.
  • the second preset layer number is equal to N1
  • the second preset layer number is limited here by way of example, and the counter is decremented by 1.
  • the terminal device falls back to a low power consumption state, and the network device also schedules the PDSCH according to the low power consumption.
  • the method in this embodiment may further include:
  • the network device sends, to the terminal device, instruction information used to indicate that the number of layers for sending the second data to the terminal device through the PDSCH is less than or equal to N1. That is, the network device instructs the terminal device to fall back to the low power consumption state by sending instruction information, and can display or implicitly indicate the time to fall back to the low power consumption state.
  • the indication information may be sent through RRC signaling, MAC CE, or DCI.
  • the first DCI when the network device has data to send, the first DCI is first sent to the terminal device.
  • the first DCI includes the number of layers for transmitting the first data through the PDSCH.
  • the The number of layers is less than or equal to N1.
  • the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, and N2 is the maximum number of layers supported by the terminal device for transmitting data through PDSCH. Therefore, the terminal device is receiving the network.
  • the terminal device When the device sends the first data through the PDSCH, under the first condition, fewer receiving antennas can be opened, which can save radio frequency power consumption of the terminal device.
  • the terminal device Under the second condition, when receiving the first data sent by the network device through the PDSCH, the terminal device can open more receiving antennas, and the receiving antenna can be dynamically adjusted, thereby saving radio frequency power consumption of the terminal device.
  • FIG. 3 is an interaction flowchart of a data transmission method embodiment provided in this application.
  • the interaction between a terminal device and a network device is used as an example for description.
  • the method in this embodiment is shown in FIG. 2. Based on the method shown, it may further include:
  • the network device sends a channel state information reference signal (Channel state information reference signal (CSI-RS) to the terminal device.
  • CSI-RS Channel state information reference signal
  • the network device sends the CSI-RS to the terminal device on the configured CSI-RS resource.
  • the terminal device receives the CSI-RS, and uses the CSI-RS to calculate the first channel quality information CQI under the first condition or the second CQI under the second condition.
  • the terminal device calculates the CQI according to the received CSI-RS. Because the number of PDSCH layers scheduled by the network device next is not clear, the terminal device needs to calculate the CQI of two types of receiving antennas.
  • the first CQI corresponds to the channel quality of the terminal device using N1 receiving antennas
  • the second CQI corresponds to the channel quality of the terminal device using N2 receiving antennas.
  • the terminal device sends the first CQI and / or the second CQI to the network device.
  • the terminal device may send the first CQI and the second CQI to the network device; or the terminal device sends the first CQI or the second CQI to the network device, and the network device estimates the second CQI according to the received first CQI.
  • the first CQI is estimated according to the received second CQI, for example, the second CQI is equal to the first CQI plus an offset; or the terminal device sends the first CQI or the second CQI to the network device according to an instruction of the network device .
  • the terminal device is instructed to feed back the first CQI or the second CQI through DCI signaling.
  • the MCS of the transmission data is determined according to the received CQI. Since different numbers of receiving antennas correspond to different channels, the modulation and coding modes that the network device can schedule (Modulation and Coding) Coding scheme (MCS) range will be different. For example, the MCS range that can be scheduled by N1 receiving antennas is represented as MSC set 1, the MCS range that can be scheduled by N2 receiving antennas is represented as MSC set 2, and the code rate of MCS set 1 is less than the MSC set. With a code rate of 2, MCS set 1 may be a subset of MSC set 2. The network device indicates the MCS of the data sent through the PDSCH through the DCI.
  • MCS Modulation and Coding
  • the terminal device receives DCI and receives data transmitted through PDSCH. If the scheduling delay indicated by DCI is large, such as cross-slot scheduling, the terminal device opens N2 receiving antennas to receive data transmitted through PDSCH. For details, see S101 ⁇ S103.
  • the network device when receiving the first data sent by the network device through the PDSCH in the time unit where the CSI-RS resource is located, if the number of antenna ports configured by the CSI-RS resource is greater than N1, the number of layers of the first data is less than Or equal to N2.
  • the network device configures the CSI-RS resource configuration, the CSI reporting configuration, and the CSI measurement configuration through radio resource control (Radio Resource Control (RRC) signaling), and the network device sends the CSI-RS to the terminal device on the configured CSI-RS resource.
  • RRC Radio Resource Control
  • the number of antenna ports of the CSI-RS resource is configured in the CSI-RS resource configuration.
  • the terminal device opens N2 receiving antennas for receiving in the time slot where the CSI-RS resource is located.
  • CSI-RS and data transmitted through PDSCH This is because CSI-RS occupies only a part of resources in a time slot. Other resources can be used to send data.
  • Terminal equipment can receive CSI-RS in a time slot and pass PDSCH. The data sent.
  • the terminal device calculates the first channel quality information CQI under the first condition and the second CQI under the second condition according to the CSI-RS, and sends the first CQI and / or the second CQI to the network device.
  • the network device can obtain an accurate CQI, and then determine the MCS of the data sent through the PDSCH according to the CQI.
  • the first condition is simultaneous slot scheduling
  • the second condition is cross-slot scheduling
  • FIG. 4 is an interaction flowchart of a data transmission method embodiment provided in this application.
  • the interaction between a terminal device and a network device is used as an example for description.
  • the method in this embodiment may include:
  • the network device sends a first DCI to the terminal device.
  • the first DCI includes the number of layers for transmitting the first data through the PDSCH.
  • the number of layers for the first data is less than or equal to N1.
  • N1 is the maximum number of layers that the terminal device supports to transmit data through the PDSCH
  • N1 is a positive integer.
  • the network device sends the first data to the terminal device.
  • the terminal device receives the first DCI, the terminal device receives the first data sent by the network device, and demodulates the received first data according to the first DCI.
  • FIG. 5 illustrates a terminal device provided from the low power consumption state to A schematic diagram of the process of falling back to a low power state after a high power state, as shown in FIG. 5, in the second time slot, the data sent by the network device to the terminal device through the PDSCH and the time when the network device sends the first DCI to the terminal device
  • the terminal device opens, for example, N1 antennas to receive the data sent by the network device.
  • the time when the network device sends DCI to the terminal device is in the third time slot, and the data sent by the network device to the terminal device through the PDSCH is in the fourth time slot.
  • the two are not in the same time slot, that is, Scheduling across time slots.
  • the terminal device turns on, for example, N2 antennas to receive the data sent by the network device.
  • Device fall back to a low power state, the terminal device receives the number of layers transmitted by the network device PDSCH second data equal to or less than N1.
  • the specific rollback manner refer to the four implementable manners in the embodiment shown in FIG. 2, which will not be repeated here.
  • FIG. 6 is a flowchart of an embodiment of a data transmission method provided in this application. As shown in FIG. 6, the method in this embodiment may include:
  • the network device configures a maximum number of PDSCH layers on a carrier or a bandwidth part (bandwidth part (BWP)) for the terminal device.
  • BWP bandwidth part
  • a network device configures multiple carriers through RRC signaling.
  • the maximum number of PDSCH layers can be configured for each carrier at the same time.
  • the carrier can be configured with the carrier through carrier configuration information or BWP configuration information. Or the maximum number of PDSCH layers on the BWP.
  • the carrier configuration information includes the maximum number of PDSCH layers of the carrier. For example, the maximum number of PDSCH layers on carrier 1 is N1, the maximum number of PDSCH layers on carrier 2 is N2, and N1 is not equal to N2, N1 are less than N2, and the maximum number of PDSCH layers is different for different carrier configurations.
  • the maximum number of PDSCH layers on the primary carrier and the secondary carrier may also be different.
  • the carrier configuration information includes at least one PDSCH maximum layer number, and one PDSCH maximum layer number is used to indicate a PDSCH maximum layer number of a group of carriers.
  • CC1 and CC2 serve as a group of carriers
  • CC3 and CC4 serve as a group of carriers.
  • a maximum PDSCH layer number can be configured for each group of carriers.
  • NR supports multiple BWPs on each carrier.
  • Network devices can configure BWPs through RRC signaling.
  • the maximum number of PDSCH layers can be configured for each BWP or BWP group at the same time.
  • the BWP configuration information includes the maximum PDSCH layer on each BWP.
  • the maximum number of PDSCH layers on BWP1 is N1
  • the maximum number of PDSCH layers on BWP2 is N2, N1 is not equal to N2, N1 is less than N2, and the maximum number of PDSCH layers of the default BWP (default BWP) is N1, non-default
  • the maximum number of PDSCH layers on the BWP is N2; if the network device is to be switched from BWP1 to BWP2, a time slot offset needs to be added to the original scheduling delay for the terminal device to open more receiving antennas.
  • the BWP configuration information includes at least one PDSCH maximum layer number, and one PDSCH maximum layer number is used to indicate a maximum PDSCH layer number on a group of BWPs. For example, there are four groups of BWPs, and a maximum PDSCH layer number can be configured for each group of BWPs.
  • the network device may indicate the default BWP identification (ID) through RRC signaling, and the terminal device determines the default BWP according to the default BWP identification. If the network device does not indicate a default BWP identification (ID), then the initial BWP (initial BWP) is considered to be the default BWP.
  • ID the default BWP identification
  • the network device may, but is not limited to, configure the maximum number of PDSCH layers through the PDSCH configuration information in the BWP configuration information, that is, the PDSCH configuration information in the BWP configuration information includes the maximum number of PDSCH layers.
  • the network device may also configure the maximum number of layers in the PDSCH to be associated with the BWP identifier, indicating the maximum number of layers in the PDSCH on the corresponding BWP. Among them, one BWP corresponds to one BWP logo.
  • the network device configures the maximum number of PDSCH layers for the BWP group.
  • a BWP group can have one or more BWPs.
  • the network device and the terminal device can determine the information of the BWP group directly or indirectly.
  • the network device can send the BWP group information to the terminal device through signaling. It can also be considered that the same configuration information indicating the maximum number of PDSCH layers is applied to one or more BWPs, and the one or more BWPs are a BWP group, that is, the network device configures the maximum number of PDSCH layers for the BWP group refers to the network device.
  • the same configuration information indicating the maximum number of PDSCH layers is applied to one or more BWPs.
  • the default BWP is configured with a maximum PDSCH layer number N1
  • the non-default BWP is configured with a maximum PDSCH layer number N2.
  • the terminal device obtains the maximum number of layers of the physical downlink shared channel PDSCH on the carrier or bandwidth part BWP.
  • it may be receiving carrier configuration information or BWP configuration information sent by a network device, or acquiring carrier configuration information or BWP configuration information of a network device static configuration.
  • the network device sends downlink control information DCI to the terminal device, where the DCI includes the number of layers for sending data through the PDSCH.
  • the network device sends data to the terminal device through the PDSCH on the target carrier or the target BWP, and the number of data layers is less than or equal to the maximum number of PDSCH layers on the target carrier or the target BWP.
  • the terminal device receives data sent by the network device through the PDSCH on the target carrier or the target BWP.
  • the terminal device by configuring the maximum number of PDSCH layers for each carrier or carrier group, or configuring the maximum number of PDSCH layers for each BWP or BWP group, the terminal device receives data sent through the PDSCH on the corresponding carrier or BWP.
  • a corresponding number of receiving antennas can be opened.
  • fewer receiving antennas can be opened, which can save radio frequency power consumption of terminal equipment.
  • FIG. 7 is a schematic structural diagram of an embodiment of a terminal device provided in this application. As shown in FIG. 7, the apparatus in this embodiment may include a first receiving module 11 and a second receiving module 12, where:
  • the first receiving module 11 is configured to receive first downlink control information DCI sent by a network device.
  • the first DCI includes a number of layers for transmitting first data through a physical downlink shared channel PDSCH. Under a first condition, the number of layers for the first data Less than or equal to N1; under the second condition, the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, N2 is the maximum number of layers supported by the terminal device for transmitting data through the PDSCH, and N1 is a positive integer.
  • the second receiving module 12 is configured to receive the first data sent by the network device, and demodulate the first data according to the first DCI.
  • the first DCI further includes a time slot offset of the first data in time, where:
  • the time slot offset is less than a preset value
  • the slot offset is greater than or equal to a preset value.
  • the terminal device in this embodiment may be used to execute the technical solution of the method embodiment shown in FIG. 2.
  • the implementation principle is similar, and details are not described herein again.
  • the terminal device when the terminal device receives the first data sent by the network device through the PDSCH, under the first condition, fewer receiving antennas can be opened, and radio frequency power consumption of the terminal device can be saved. Under the second condition, when receiving the first data sent by the network device through the PDSCH, the terminal device can open more receiving antennas, and the receiving antenna can be dynamically adjusted, thereby saving radio frequency power consumption of the terminal device.
  • FIG. 8 is a schematic structural diagram of an embodiment of a terminal device provided in this application. As shown in FIG. 8, the device in this embodiment is based on the device structure shown in FIG. 7, and may further include a first timing module. 13.
  • the first timing module 1 is used to start the timer after the second receiving module 12 receives the first data sent by the network device, and demodulate the first data according to the first DCI, from the time slot where the first data is located. start the timer;
  • the second receiving module 12 does not receive data sent through the PDSCH within the preset X time slots.
  • the number of layers for the second receiving module to receive the second data sent by the network device through the PDSCH is less than or equal to N1 ;or,
  • the first timing module 13 restarts the timer.
  • the first timing module restarts the timer
  • the first timing module continues to count the timer.
  • the second receiving module receives the layer of the third data sent by the network device through the PDSCH. The number is less than or equal to N1.
  • the apparatus in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principles thereof are similar, and details are not described herein again.
  • the terminal device after the terminal device turns on N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas through the setting of a timer, thereby saving the terminal device. Power consumption.
  • FIG. 9 is a schematic structural diagram of an embodiment of a terminal device provided in this application.
  • the device in this embodiment is based on the device structure shown in FIG. 7, and may further include a second timing module. 14.
  • the second timing module 14 is configured to start a timer after the second receiving module 12 receives the first data sent by the network device and demodulates the first data according to the first DCI, and starts counting from the position where the first DCI is located. ;
  • the number of layers for the second receiving module to receive the second data sent by the network device through the PDSCH is less than or equal to N1; or,
  • the second receiving module 12 receives the second DCI within the preset X time slots, and then re-times the timer, where the second DCI includes the number of layers of the third data transmitted through the PDSCH.
  • the second timing module restarts the timer
  • the second timing module continues to count the timer. When the timer expires, the second receiving module receives The number of layers of the third data is less than or equal to N1.
  • the terminal device after the terminal device turns on N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas through the setting of a timer, thereby saving the terminal device. Power consumption.
  • the second receiving module 12 receives the network device to send the PDSCH through the PDSCH.
  • the number of layers of the third data is less than or equal to N1, and the preset threshold is a positive integer.
  • the apparatus in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principles thereof are similar, and details are not described herein again.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work by using less than or equal to N1 receiving antennas by setting the counting device, thereby saving the terminal device. Power consumption.
  • FIG. 10 is a schematic structural diagram of an embodiment of a terminal device provided in the present application.
  • the device in this embodiment is based on the device structure shown in FIG. 7, and may further include a third receiving module. 15.
  • the third receiving module 15 is configured to receive the first data sent by the network device after the second receiving module 12 and demodulate the first data according to the first DCI, and receive the network device to instruct the receiving network device to pass the PDSCH.
  • the indication that the number of layers of the second data sent is less than or equal to N1.
  • the terminal device after the terminal device opens N2 receiving antennas to receive the first data of the network device, the terminal device can fall back to work with less than or equal to N1 receiving antennas through the instruction information of the network device, thereby saving the terminal The power consumption of the device.
  • FIG. 11 is a schematic structural diagram of an embodiment of a terminal device provided in this application. As shown in FIG. 11, the device in this embodiment is based on the device structure shown in any of FIG. 7 to FIG. 10. Further, the device may further include: A fourth receiving module 16 and a processing module 17, wherein the fourth receiving module 16 is configured to receive a channel state information reference signal CSI-RS sent by a network device;
  • the processing module 17 is configured to calculate the first channel quality information CQI under the first condition and the second CQI under the second condition according to the CSI-RS, and send the first CQI and / or the second CQI to the network device.
  • the number of antenna ports configured in the CSI-RS resource is greater than N1
  • the number of layers of the first data is less than Or equal to N2.
  • the apparatus in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principles thereof are similar, and details are not described herein again.
  • the terminal device provided in this embodiment calculates the first channel quality information CQI under the first condition and the second CQI under the second condition through the terminal device according to the CSI-RS, and sends the first CQI and / or the second CQI to the network device.
  • CQI solves the problem of how a terminal device reports a CQI to a network device when the receiving antenna is dynamically adjusted under different conditions.
  • the network device can obtain an accurate CQI, thereby determining the MCS of the data sent through the PDSCH according to the CQI.
  • FIG. 12 is a schematic structural diagram of an embodiment of a network device provided in this application. As shown in FIG. 12, the apparatus in this embodiment may include a first sending module 21 and a second sending module 22, where:
  • the first sending module 21 is configured to send first downlink control information DCI to a terminal device.
  • the first DCI includes a number of layers for transmitting first data through a physical downlink shared channel PDSCH. Under the first condition, the number of layers for the first data is less than Or equal to N1; under the second condition, the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, N2 is the maximum number of layers of data transmitted through the PDSCH supported by the terminal device, and N1 is a positive integer.
  • the second sending module 22 is configured to send the first data to the terminal device.
  • the first DCI further includes a time slot offset of the first data in time, where:
  • the time slot offset is less than a preset value
  • the slot offset is greater than or equal to a preset value.
  • the network device in this embodiment may be used to execute the technical solution of the method embodiment shown in FIG. 2, and the implementation principles are similar, and details are not described herein again.
  • the network device when the network device has data to send, it first sends a first DCI to the terminal device.
  • the first DCI includes the number of layers for transmitting the first data through the PDSCH.
  • the layer of the first data The number is less than or equal to N1.
  • the number of layers of the first data is less than or equal to N2, N1 ⁇ N2, and N2 is the maximum number of layers that the terminal device supports to transmit data through PDSCH.
  • the terminal device Under the first condition, fewer receiving antennas can be opened, and radio frequency power consumption of the terminal device can be saved.
  • the terminal device when receiving the first data sent by the network device through the PDSCH, the terminal device can open more receiving antennas, and the receiving antenna can be dynamically adjusted, thereby saving radio frequency power consumption of the terminal device.
  • FIG. 13 is a schematic structural diagram of an embodiment of a network device provided in this application. As shown in FIG. 13, the device in this embodiment is based on the device structure shown in FIG. 12. Further, under the second condition, the device Including: first timing module 23,
  • the first timing module 23 is configured to start a timer after the second sending module sends the first data to the terminal device, and start timing from the time slot where the first data is located;
  • the number of layers for the second sending module 22 to send the second data to the terminal device through the PDSCH is less than or equal to N1; or,
  • the first timing module 23 restarts the timer.
  • the first timing module 23 retimes the timer
  • the first timing module 23 continues to count the timer.
  • the second sending module 22 sends the third data to the terminal device through the PDSCH.
  • the number of layers is less than or equal to N1.
  • the network device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2.
  • the technical effects and implementation principles are similar, and are not described herein again.
  • FIG. 14 is a schematic structural diagram of an embodiment of a network device provided in this application. As shown in FIG. 14, the device in this embodiment is based on the device structure shown in FIG. 12. Further, under the second condition, the second timing module 24 includes: a second timing module 24 is configured to start a timer after the second sending module sends the first data to the terminal device, and start timing from the position where the first DCI is located;
  • the number of layers for the second sending module 22 to send the second data to the terminal device through the PDSCH is less than or equal to N1; or,
  • the second timing module 24 retimes the timer, where the second DCI includes the number of layers of the third data transmitted through the PDSCH. .
  • the second timing module 24 retimes the timer
  • the second timing module 24 continues to count the timer. When the timer expires, the second sending module 22 sends a PDSCH to the terminal device.
  • the number of layers transmitting the third data is less than or equal to N1.
  • the second sending module 22 sends the third data to the terminal device through the PDSCH.
  • the number of layers is less than or equal to N1, and the preset threshold is a positive integer.
  • the network device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2.
  • the technical effects and implementation principles are similar, and are not described herein again.
  • FIG. 15 is a schematic structural diagram of an embodiment of a network device provided in the present application. As shown in FIG. 15, the device in this embodiment is based on the device structure shown in FIG. 12, and further may include a third sending module. 25. After the second sending module 22 sends the first data to the terminal device, send the instruction information to the terminal device to indicate that the number of layers for sending the second data to the terminal device through the PDSCH is less than or equal to N1.
  • the network device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2.
  • the technical effects and implementation principles are similar, and are not described herein again.
  • FIG. 16 is a schematic structural diagram of an embodiment of a network device provided in the present application.
  • the device in this embodiment is based on the device structure shown in any of FIG. 12 to FIG. 15, and may further include: : A fourth sending module 26 and a receiving module 27, wherein the fourth sending module 26 is configured to send a channel state information reference signal CSI-RS to the terminal device, and is used by the terminal device to calculate the first channel under the first condition according to the CSI-RS The quality information CQI and the second CQI under the second condition;
  • CSI-RS channel state information reference signal
  • the receiving module 27 is configured to receive a first CQI and / or a second CQI sent by a terminal device.
  • the number of antenna ports configured in the CSI-RS resource is greater than N1
  • the number of layers of the first data is less than or equal to N2.
  • the network device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2.
  • the technical effects and implementation principles are similar, and are not described herein again.
  • FIG. 17 is a schematic structural diagram of an embodiment of a terminal device provided in this application.
  • the apparatus in this embodiment may include an obtaining module 31, a first receiving module 32, and a second receiving module 33.
  • Module 31 is configured to obtain the maximum number of layers of the physical downlink shared channel PDSCH on the carrier or bandwidth part BWP;
  • the first receiving module 32 is configured to receive downlink control information DCI sent by a network device, where the DCI includes the number of layers to send data through the PDSCH;
  • the second receiving module 33 is configured to receive data sent by the network device through the PDSCH on the target carrier or the target BWP, and demodulate the data according to the DCI.
  • the number of data layers is less than or equal to the maximum number of PDSCH layers on the target carrier or the target BWP.
  • the obtaining module 31 is configured to obtain carrier configuration information or BWP configuration information.
  • the carrier configuration information includes the maximum number of PDSCH layers of each carrier, or the carrier configuration information includes at least one maximum PDSCH layer and one PDSCH maximum layer. The number is used to indicate the maximum number of PDSCH layers for a group of carriers.
  • the BWP configuration information includes the maximum number of PDSCH layers on each BWP, or the BWP configuration information includes at least one maximum PDSCH layer number.
  • One PDSCH maximum layer number is used to indicate Maximum number of PDSCH layers on a group of BWPs;
  • the maximum number of PDSCH layers of each carrier is obtained according to the carrier configuration information, or the maximum number of PDSCH layers on each BWP is obtained according to the BWP configuration information.
  • the terminal device in this embodiment may be used to execute the technical solution of the method embodiment shown in FIG. 6.
  • the technical effects and implementation principles are similar, and are not described herein again.
  • FIG. 18 is a schematic structural diagram of an embodiment of a network device provided in this application.
  • the apparatus in this embodiment may include a configuration module 41, a first sending module 42, and a second sending module 43, where:
  • the configuration module 41 is configured to configure a maximum number of layers of a physical downlink shared channel PDSCH on a carrier or bandwidth part BWP for a terminal device;
  • the first sending module 42 is configured to send downlink control information DCI to the terminal device, where the DCI includes the number of layers for sending data through the PDSCH;
  • the second sending module 43 is configured to send data to the terminal device through the PDSCH on the target carrier or the target BWP, and the number of data layers is less than or equal to the maximum number of PDSCH layers on the target carrier or the target BWP.
  • the configuration module 41 is configured to configure the carrier or the maximum PDSCH layer number on the BWP for the terminal device by using the carrier configuration information or the BWP configuration information, and the carrier configuration information includes the maximum PDSCH layer number of the carrier, or the carrier configuration information Including at least one PDSCH maximum layer number, one PDSCH maximum layer number is used to indicate the maximum PDSCH layer number of a group of carriers, the BWP configuration information includes the maximum PDSCH layer number on each BWP, or the BWP configuration information includes at least one PDSCH Maximum number of layers.
  • One PDSCH maximum layer number is used to indicate the maximum number of PDSCH layers on a group of BWPs.
  • the network device in this embodiment may be used to execute the technical solution of the method embodiment shown in FIG. 6.
  • the technical effects and implementation principles are similar, and are not described herein again.
  • This application can divide the functional modules of the terminal device or the network device according to the foregoing method examples.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above integrated modules may be implemented in the form of hardware or software functional modules. It should be noted that the division of the modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner.
  • FIG. 19 is a schematic structural diagram of another terminal device provided by this application.
  • the terminal device 700 includes:
  • the memory 701 is configured to store program instructions, and the memory 701 may be a flash (flash memory).
  • the processor 702 is configured to call and execute program instructions in the memory to implement each step in the data transmission method of any one of FIG. 2 to FIG. 4 or FIG. 6. For details, refer to related descriptions in the foregoing method embodiments.
  • An input / output interface 703 may also be included.
  • the input / output interface 703 may include an independent output interface and an input interface, or may be an integrated interface that integrates input and output.
  • the output interface is used to output data, and the input interface is used to obtain input data.
  • the output data is the collective name of the output in the method embodiment, and the input data is the collective name of the input in the method embodiment.
  • the terminal device may be configured to execute steps and / or processes corresponding to the terminal device in the foregoing method embodiments.
  • FIG. 20 is a schematic structural diagram of another network device provided in this application.
  • the network device 800 includes:
  • the memory 801 is configured to store program instructions, and the memory 801 may be a flash (flash memory).
  • the processor 802 is configured to call and execute program instructions in the memory to implement each step in the data transmission method of any one of FIG. 2 to FIG. 4 or FIG. 6. For details, refer to related descriptions in the foregoing method embodiments.
  • An input / output interface 803 may also be included.
  • the input / output interface 803 may include an independent output interface and an input interface, or may be an integrated interface that integrates input and output.
  • the output interface is used to output data, and the input interface is used to obtain input data.
  • the output data is the collective name of the output in the method embodiment, and the input data is the collective name of the input in the method embodiment.
  • the network device may be configured to execute steps and / or processes corresponding to the network device in the foregoing method embodiment.
  • the present application also provides a readable storage medium that stores an execution instruction.
  • the terminal device executes the execution instruction, executes the data transmission method in the foregoing method embodiment.
  • the application also provides a program product including an execution instruction, and the execution instruction is stored in a readable storage medium.
  • At least one processor of the terminal device may read the execution instruction from a readable storage medium, and the execution of the execution instruction by the at least one processor causes the terminal device to implement the data transmission method in the foregoing method embodiment.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission by wire (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk (SSD)), and the like.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a DVD
  • a semiconductor medium for example, a solid state disk (Solid State Disk (SSD)

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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 un procédé et un appareil de transmission de données. Le procédé comprend les étapes consistant à : recevoir des premières DCI transmises par un dispositif de réseau, les premières DCI comprenant le nombre de couches pour transmettre des premières données par l'intermédiaire d'un PDSCH, le nombre de couches pour les premières données est inférieur ou égal à N1 dans une première condition ; dans une seconde condition, le nombre de couches pour les premières données étant inférieur ou égal à N2, N1 < N2, N2 étant le nombre maximal de couches pour la transmission de données par le PDSCH qui est pris en charge par le dispositif terminal, N1 étant un nombre entier positif ; et recevoir des premières données transmises par le dispositif de réseau, et démoduler les premières données selon les premières DCI. Par conséquent, lors de la réception des premières données transmises par le dispositif de réseau par l'intermédiaire du PDSCH, le dispositif terminal peut autoriser moins d'antennes de réception dans la première condition, ce qui peut économiser la consommation d'énergie RF du dispositif terminal ; dans la seconde condition, plus d'antennes de réception peuvent être activées, et les antennes de réception peuvent être ajustées de manière dynamique, ce qui permet d'économiser la consommation d'énergie radiofréquence du dispositif terminal.
PCT/CN2019/099988 2018-08-10 2019-08-09 Procédé et appareil de transmission de données Ceased WO2020030112A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19847169.0A EP3826370B1 (fr) 2018-08-10 2019-08-09 Configuration de différentes quantités de couches pour la transmission de données à travers un pdsch dans différentes conditions
US17/172,080 US12016043B2 (en) 2018-08-10 2021-02-10 Data transmission method and apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201810911048 2018-08-10
CN201810911048.6 2018-08-10
CN201910028357.3 2019-01-11
CN201910028357.3A CN110831130B (zh) 2018-08-10 2019-01-11 数据传输方法及装置

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