WO2020216130A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2020216130A1
WO2020216130A1 PCT/CN2020/085216 CN2020085216W WO2020216130A1 WO 2020216130 A1 WO2020216130 A1 WO 2020216130A1 CN 2020085216 W CN2020085216 W CN 2020085216W WO 2020216130 A1 WO2020216130 A1 WO 2020216130A1
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WO
WIPO (PCT)
Prior art keywords
time
frequency resource
frequency
domain
downlink data
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PCT/CN2020/085216
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English (en)
Chinese (zh)
Inventor
谢信乾
龙毅
郭志恒
费永强
毕文平
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华为技术有限公司
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Publication of WO2020216130A1 publication Critical patent/WO2020216130A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • the new radio (NR) technology in the fifth generation mobile communication system defines the synchronization signal/broadcast channel block (SS/PBCH block, SSB), and one SSB is occupied in the time domain.
  • OFDM orthogonal frequency division multiplexing
  • a network device when a network device sends a demodulation reference signal (demodulation reference signal, DMRS) corresponding to a physical downlink shared channel (PDSCH) to a terminal device, it will try to avoid the SSB.
  • DMRS demodulation reference signal
  • PDSCH physical downlink shared channel
  • SSB occupies 4 consecutive OFDM symbols, for example, these 4 OFDM symbols may be the 3rd to 6th symbols in a time slot, which makes the network equipment have many restrictions when scheduling the DMRS corresponding to the PDSCH, and the scheduling is complicated. Higher degrees will cause waste of resources.
  • the network equipment cannot send the DMRS on some frequency domain resources, and the channel estimation error of some PDSCHs is large, which affects the correct rate of the terminal equipment receiving the PDSCH.
  • the embodiments of the present application provide a communication method and device, which are used to reduce the complexity of network equipment scheduling and improve the accuracy of receiving downlink data by terminal equipment.
  • an embodiment of the present application provides a communication method.
  • the method includes: receiving first indication information from a network device, where the first indication information is used to indicate a first time-frequency resource, and the first time-frequency resource is used to carry downlink Data, the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource; if the second time-frequency resource overlaps the third time-frequency resource in the time domain, the fourth time-frequency resource
  • the third time-frequency resource includes time-frequency resources or reserved time-frequency resources for carrying synchronization signals and/or broadcast channel blocks, and the fourth time-frequency resource is located in the first time-frequency resource. For time-frequency resources outside the first frequency domain, the first frequency domain and the third time-frequency resource occupy the same frequency domain. This method can be applied to a terminal device or a chip in a terminal device.
  • the network device when the second time-frequency resource and the third time-frequency resource overlap in the time domain, the network device may not be able to overlap the second time-frequency resource with the third time-frequency resource.
  • the demodulation reference signal is sent on the time-frequency resource. Therefore, the terminal device can receive downlink data on the fourth time-frequency resource other than the first frequency domain in the first time-frequency resource, thereby effectively improving the terminal device’s ability to receive downlink data. Correct rate.
  • the network device when the network device is scheduling the demodulation reference signal for demodulating downlink data, it can also allow the second time-frequency resource to overlap with the third time-frequency resource, thereby reducing the complexity of network device scheduling and improving the resource utilization of the system. .
  • the method further includes: if the second time-frequency resource and the third time-frequency resource do not overlap in the time domain, and the first time-frequency resource and the third time-frequency resource overlap in the time domain , Receiving downlink data from the network device on the fifth time-frequency resource, where the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the terminal device can use the first time-frequency resource in addition to the third time-frequency resource.
  • Time-frequency resources are used for uplink and downlink data reception, thereby improving the resource utilization of the system.
  • the first indication information is also used to indicate the second time-frequency resource, which makes the communication method more flexible.
  • the terminal device can receive downlink data from the network device on the fourth time-frequency resource, and the fourth time-frequency resource
  • the frequency resource is a time-frequency resource in the first time-frequency resource that is outside the range of the first frequency domain; otherwise, if there are time-domain symbols in the second time-frequency resource that do not overlap with the third time-frequency resource, the terminal device can be in the fifth
  • the downlink data is received from the network device on the time-frequency resource, and the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the second time-frequency resource and the third time-frequency resource may completely overlap in the time domain, or may partially overlap.
  • the terminal device may not receive downlink data from the time-frequency resource located in the first frequency domain in the first time-frequency resource, thereby improving The correct rate of the terminal device receiving the downlink data; in the case that the second time-frequency resource and the third time-frequency resource partially overlap in the time domain, the terminal device can select from the first time-frequency resource other than the third time-frequency resource.
  • the downlink data is received on the frequency resource, thereby improving the resource utilization of the system.
  • an embodiment of the present application provides a communication method.
  • the method includes: sending first indication information to a terminal device, where the first indication information is used to indicate a first time-frequency resource, and the first time-frequency resource is used to carry downlink Data, the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource; if the second time-frequency resource overlaps the third time-frequency resource in the time domain, the fourth time-frequency resource.
  • the third time-frequency resource includes time-frequency resources or reserved time-frequency resources for carrying synchronization signals and/or broadcast channel blocks, and the fourth time-frequency resource is located in the first time-frequency resource. For time-frequency resources outside the first frequency domain, the first frequency domain and the third time-frequency resource occupy the same frequency domain.
  • This method can be applied to a network device, or a chip in a network device.
  • the network device when the second time-frequency resource and the third time-frequency resource overlap in the time domain, the network device may not be able to overlap the second time-frequency resource with the third time-frequency resource.
  • the demodulation reference signal is sent on the time-frequency resource. Therefore, in order to improve the accuracy of the terminal device receiving the downlink data, the network device can correspondingly send the terminal device to the terminal on the fourth time-frequency resource other than the first frequency domain in the first time-frequency resource. The device sends downlink data.
  • the network device when the network device schedules downlink data and demodulates the demodulation reference signal of the downlink data, it can allow the downlink data to overlap with the third time-frequency resource, thereby reducing the complexity of network device scheduling and improving the resource utilization of the system.
  • the method further includes: if the second time-frequency resource and the third time-frequency resource do not overlap in the time domain, and the first time-frequency resource and the third time-frequency resource overlap in the time domain Send the downlink data to the terminal device on the fifth time-frequency resource, where the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the network device can use the first time-frequency resource except for the third time-frequency resource.
  • Time-frequency resources are used to send downlink data, thereby improving the resource utilization of the system.
  • the first indication information is also used to indicate the second time-frequency resource, thereby making the communication method more flexible.
  • the network device can send downlink data to the terminal device on the fourth time-frequency resource, and the fourth time-frequency resource
  • the frequency resource is the time-frequency resource outside the first frequency domain in the first time-frequency resource; otherwise, if there are time-domain symbols in the second time-frequency resource that do not overlap with the third time-frequency resource, the network device can be in the fifth
  • the downlink data is sent to the terminal device on the time-frequency resource, and the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the second time-frequency resource and the third time-frequency resource may completely overlap in the time domain, or may partially overlap.
  • the network device may not send downlink data on the time-frequency resource located in the first frequency domain in the first time-frequency resource, thereby improving The correct rate of the terminal device receiving the downlink data; in the case that the second time-frequency resource and the third time-frequency resource partially overlap in the time domain, the network device can use the time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the downlink data is sent on the frequency resource, thereby improving the resource utilization of the system.
  • an embodiment of the present application provides another communication method.
  • the method includes: a terminal device receives first indication information from a network device, the first indication information is used to indicate a first time-frequency resource, and the first time-frequency resource is used for Carrying downlink data, the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource; if the second time-frequency resource and the third time-frequency resource overlap in the time domain, The demodulation reference signal is received from the network device on the time-frequency resource.
  • the third time-frequency resource includes the time-frequency resource or reserved time-frequency resource used to carry the synchronization signal/broadcast channel block SSB.
  • the sixth time-frequency resource includes the seventh time-frequency resource. Resources, the seventh time-frequency resource is located in the first time-frequency resource, and is the same as the time domain and frequency domain occupied by the third time-frequency resource. This method can be applied to a terminal device, or a chip in a terminal device.
  • the terminal device can receive the demodulation reference signal from the network device on the seventh time-frequency resource . Because the seventh time-frequency resource and the third time-frequency resource occupy the same time-domain and different frequency domains, the terminal device can be enabled to compare the first time-frequency resource with the demodulation reference signal received on the seventh time-frequency resource.
  • the downlink data sent in the first frequency domain is correctly decoded, so as to improve the accuracy of the terminal equipment receiving the downlink data.
  • the network equipment when the network equipment schedules downlink data and demodulates the demodulation reference signal of the downlink data, it can also allow the downlink data to overlap with the third time-frequency resource, thereby reducing the complexity of network equipment scheduling and improving the resource utilization of the system. .
  • the sixth time-frequency resource further includes time-frequency resources other than the third time-frequency resource in the second time-frequency resource.
  • the method further includes: receiving downlink data from a network device on an eighth time-frequency resource, where the eighth time-frequency resource is the first time-frequency resource except the third time-frequency resource and the seventh time-frequency resource. Time-frequency resources other than frequency resources.
  • the seventh time-frequency resource is the time-frequency resource used to carry the demodulation reference signal
  • the third time-frequency resource and the seventh time-frequency resource can be divided from the first time-frequency resource
  • the other eighth time-frequency resources are used to receive downlink data, thereby improving the resource utilization of the system.
  • the method further includes: if the second time-frequency resource and the third time-frequency resource do not overlap in the time domain, and the first time-frequency resource and the third time-frequency resource overlap in the time domain , Receiving downlink data from the network device on the fifth time-frequency resource, where the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the terminal device can use the first time-frequency resource in addition to the third time-frequency resource.
  • Time-frequency resources are used for uplink and downlink data reception, thereby improving the resource utilization of the system.
  • an embodiment of the present application provides another communication method.
  • the method includes: a network device sends first indication information to a terminal device, the first indication information is used to indicate a first time-frequency resource, and the first time-frequency resource is used For carrying downlink data, the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource; if the second time-frequency resource and the third time-frequency resource overlap in the time domain, The demodulation reference signal is sent to the terminal device on the six-time frequency resource.
  • the third time-frequency resource includes the time-frequency resource or reserved time-frequency resource used to carry the synchronization signal/broadcast channel block SSB.
  • the sixth time-frequency resource includes the seventh time Frequency resources, the seventh time-frequency resource is located in the first time-frequency resource, and is the same as the time domain and frequency domain occupied by the third time-frequency resource. This method can be applied to network equipment, or the chip of network equipment.
  • the network device can send a demodulation reference signal to the terminal device on the seventh time-frequency resource . Because the seventh time-frequency resource and the third time-frequency resource occupy the same time-domain and different frequency domains, the terminal device can be enabled to compare the first time-frequency resource with the demodulation reference signal received on the seventh time-frequency resource.
  • the downlink data sent in the first frequency domain is correctly decoded, so as to improve the accuracy of the terminal equipment receiving the downlink data.
  • the network equipment when the network equipment schedules downlink data and demodulates the demodulation reference signal of the downlink data, it can also allow the downlink data to overlap with the third time-frequency resource, thereby reducing the complexity of network equipment scheduling and improving the resource utilization of the system. .
  • the sixth time-frequency resource further includes time-frequency resources other than the third time-frequency resource in the second time-frequency resource.
  • the method further includes: sending downlink data to the terminal device on an eighth time-frequency resource, where the eighth time-frequency resource is the first time-frequency resource excluding the third time-frequency resource and the seventh time-frequency resource. Time-frequency resources other than frequency resources.
  • the network device can divide the third time-frequency resource and the seventh time-frequency resource from the first time-frequency resource
  • the downlink data is sent on the eighth time-frequency resource other than the frequency resource, thereby improving the resource utilization rate of the system.
  • the method further includes: if the second time-frequency resource and the third time-frequency resource do not overlap in the time domain, and the first time-frequency resource and the third time-frequency resource overlap in the time domain Send the downlink data to the terminal device on the fifth time-frequency resource, where the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the network device can use the first time-frequency resource except for the third time-frequency resource.
  • Time-frequency resources are used to send downlink data, thereby improving the resource utilization of the system.
  • an embodiment of the present application provides yet another communication method, which includes:
  • the terminal device receives first indication information from the network device, where the first indication information is used to indicate a first time-frequency resource, and the first time-frequency resource is used to carry downlink data and is used to carry a demodulation reference signal for demodulating the downlink data.
  • the time-frequency resource is the second time-frequency resource; if the second time-frequency resource and the third time-frequency resource overlap in the time domain, and the precoding granularity of the downlink data is smaller than the bandwidth of the first time-domain resource, the fourth time-frequency resource.
  • the third time-frequency resource includes time-frequency resources or reserved time-frequency resources for carrying synchronization signals and/or broadcast channel blocks, and the fourth time-frequency resource is located in the first time-frequency resource. For time-frequency resources outside the first frequency domain, the first frequency domain and the third time-frequency resource occupy the same frequency domain. This method can be applied to terminal equipment, or the chip of the terminal equipment.
  • the terminal device may not be able to use the demodulation reference signal received on time-frequency resources other than the third time-frequency resource in the second time-frequency resource on the time-frequency resource within the first frequency domain in the first time-frequency resource.
  • the sent downlink data is correctly decoded, so the terminal device can receive the downlink data from the network device on the fourth time-frequency resource other than the first frequency domain in the first time-frequency resource, thereby improving the correct rate of the terminal device receiving the downlink data .
  • the method further includes: if the second time-frequency resource and the third time-frequency resource overlap in the time domain, and the precoding granularity of the downlink data is equal to the bandwidth of the first time-domain resource, The downlink data is received from the network device on the time-frequency resource, and the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the terminal device when the second time-frequency resource and the third time-frequency resource overlap in the time domain, and the precoding granularity of the downlink data is equal to the bandwidth of the first time domain resource, the terminal device According to the demodulation reference signal received on the time-frequency resource other than the third time-frequency resource in the second time-frequency resource, the data sent on the time-frequency resource within the first frequency domain in the first time-frequency resource The downlink data is correctly decoded, so the terminal device can receive the downlink data from the network device on the time-frequency resources other than the third time-frequency resource in the first time-frequency resource, thereby improving the resource utilization rate of the system.
  • the embodiments of the present application provide yet another communication method, which can be applied to a network device.
  • the method includes: sending first indication information to a terminal device, where the first indication information is used to indicate a first time-frequency resource.
  • the first time-frequency resource is used to carry downlink data
  • the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource; if the second time-frequency resource and the third time-frequency resource are in the time domain There is overlap in the above, and the precoding granularity of the downlink data is smaller than the bandwidth of the first time domain resource, the downlink data is sent to the terminal device on the fourth time-frequency resource, and the third time-frequency resource includes the synchronization signal and/or the broadcast channel
  • the time-frequency resource of the block or the reserved time-frequency resource, the fourth time-frequency resource is the time-frequency resource located outside the first frequency-domain range in the first time-frequency resource, and the frequency occupied by the first frequency-domain range and the third time
  • the terminal The device may not be able to use the demodulation reference signal received on time-frequency resources other than the third time-frequency resource in the second time-frequency resource on the time-frequency resource within the first frequency domain in the first time-frequency resource.
  • the sent downlink data is decoded correctly, so the network device can send the downlink data to the terminal device on the fourth time-frequency resource except the first frequency domain in the first time-frequency resource, thereby improving the correct rate of the terminal device receiving the downlink data .
  • the method further includes: if the second time-frequency resource and the third time-frequency resource overlap in the time domain, and the precoding granularity of the downlink data is equal to the bandwidth of the first time-domain resource, The downlink data is sent to the terminal device on the time-frequency resource, and the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the terminal device when the second time-frequency resource and the third time-frequency resource overlap in the time domain, and the precoding granularity of the downlink data is equal to the bandwidth of the first time domain resource, the terminal device According to the demodulation reference signal received on the time-frequency resource other than the third time-frequency resource in the second time-frequency resource, the data sent on the time-frequency resource within the first frequency domain in the first time-frequency resource The downlink data is correctly decoded, so the network device can send downlink data to the terminal device on the time-frequency resources other than the third time-frequency resource in the first time-frequency resource, thereby improving the resource utilization of the system.
  • an embodiment of the present application provides a communication device that has the function of a terminal device in any possible design of the first aspect or the first aspect, or has the function of the third aspect or the third aspect.
  • the function of the terminal device in any possible design.
  • the communication device may be a terminal device, such as a handheld terminal device, a vehicle-mounted terminal device, etc., a device included in the terminal device, such as a chip, or a device including the terminal device.
  • the functions of the foregoing terminal device may be implemented by hardware, or may be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the foregoing functions.
  • the structure of the communication device includes a processing module and a transceiver module, wherein the processing module is configured to support the communication device to perform the corresponding function in the first aspect or any one of the first aspects. , Or perform the corresponding function in any design of the third aspect or the eighth aspect mentioned above.
  • the transceiver module is used to support communication between the communication device and other communication devices, for example, receiving first indication information from a network device, or receiving downlink data from a network device.
  • the communication device may also include a storage module, which is coupled with the processing module, which stores program instructions and data necessary for the communication device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory.
  • the memory may be integrated with the processor or may be provided separately from the processor, which is not limited in this application.
  • the structure of the communication device includes a processor, and may also include a memory.
  • the processor is coupled with the memory and can be used to execute computer program instructions stored in the memory, so that the communication device executes the first aspect described above. Or the method in any possible design of the first aspect, or execute the method in the third aspect or any of the possible designs of the third aspect.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication interface may be a transceiver or an input/output interface; when the communication device is a chip included in the terminal device, the communication interface may be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , So that the chip system implements any possible design method of the foregoing first aspect, or implements any possible design method of the foregoing third aspect.
  • processors in the chip system there may be one or more processors in the chip system.
  • the processor can be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips.
  • the setting method of the processor is not specifically limited.
  • an embodiment of the present application provides a computer-readable storage medium, which stores computer-readable instructions.
  • the computer reads and executes the computer-readable instructions, the computer executes the first The method in any possible design of the aspect, or the method in any possible design of the foregoing third aspect.
  • the embodiments of the present application provide a computer program product.
  • the computer reads and executes the computer program product, the computer executes any one of the possible design methods in the first aspect, or executes the first Any of the three possible design methods.
  • an embodiment of the present application provides a communication device that has the function of a network device in any possible design of the foregoing second aspect or the second aspect, or has the capability to implement the foregoing fourth aspect or the first aspect.
  • the function of the network device in any of the four possible designs.
  • the communication device may be a network device, such as a base station, or a device included in the network device, such as a chip.
  • the functions of the above-mentioned network equipment may be realized by hardware, or may be realized by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device includes a processing module and a transceiver module, wherein the processing module is configured to support the communication device to perform the corresponding function in the second aspect or any one of the second aspects above. , Or perform the corresponding function in the fourth aspect or any one of the fourth aspects mentioned above.
  • the transceiver module is used to support communication between the communication device and other communication devices, for example, sending first indication information to the terminal device, or sending downlink data to the terminal device.
  • the communication device may also include a storage module, which is coupled with the processing module, which stores program instructions and data necessary for the communication device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory.
  • the memory may be integrated with the processor or may be provided separately from the processor, which is not limited in this application.
  • the structure of the communication device includes a processor, and may also include a memory.
  • the processor is coupled to the memory and can be used to execute computer program instructions stored in the memory, so that the communication device executes the above second aspect. Or any one of the possible design methods of the second aspect, or implement any one of the foregoing fourth aspect or the fourth aspect of the possible design method.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication interface may be a transceiver or an input/output interface; when the communication device is a chip included in the network device, the communication interface may be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or instruction is executed by the processor At this time, the chip system is made to implement any one of the possible design methods of the foregoing second aspect or implement any one of the foregoing fourth aspect methods in a possible design.
  • processors in the chip system there may be one or more processors in the chip system.
  • the processor can be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips.
  • the setting method of the processor is not specifically limited.
  • an embodiment of the present application provides a computer-readable storage medium that stores computer-readable instructions in the computer storage medium.
  • the computer reads and executes the computer-readable instructions, the computer executes the above-mentioned The method in any possible design of the second aspect, or the method in any possible design of the fourth aspect described above.
  • the embodiments of the present application provide a computer program product.
  • the computer reads and executes the computer program product, the computer executes any of the possible design methods in the second aspect, or executes the foregoing Any possible design method of the fourth aspect.
  • an embodiment of the present application provides a communication system, which includes the network device and at least one terminal device described in the foregoing aspects.
  • FIG. 1 is a schematic diagram of a network architecture of a communication system to which an embodiment of this application is applicable;
  • FIG. 2 is a schematic diagram of a demodulation reference signal DMRS provided by an embodiment of the application
  • FIG. 3 is a schematic diagram of a synchronization signal/broadcast channel block SSB provided by an embodiment of the application;
  • FIG. 5a is a schematic diagram of a first time-frequency resource and a second time-frequency resource provided by an embodiment of this application;
  • FIG. 5b is a schematic diagram of a third time-frequency resource and a fourth time-frequency resource provided by an embodiment of this application;
  • FIG. 5c is a schematic diagram of a fifth time-frequency resource provided by an embodiment of this application.
  • FIG. 5d is a schematic diagram of the second time-frequency resource and the third time-frequency resource partially overlapping in the time domain provided by an embodiment of the application;
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of a sixth time-frequency resource and a seventh time-frequency resource provided by an embodiment of this application;
  • FIG. 8 is a schematic flowchart of yet another communication method provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 10 is another schematic structural diagram of a communication device according to an embodiment of the application.
  • FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 12 is a schematic diagram of another structure of another communication device provided by an embodiment of this application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE frequency division duplex FDD
  • TDD LTE Time division duplex
  • UMTS universal mobile telecommunication system
  • WIMAX worldwide interoperability for microwave access
  • 5G fifth generation
  • NR new radio
  • FIG. 1 is a schematic diagram of a network architecture of a communication system to which an embodiment of this application is applicable.
  • the communication system includes a network device 110, a terminal device 120, a terminal device 130, and a terminal device 140.
  • the network device may communicate with at least one terminal device (such as the terminal device 120) through uplink (UL) and downlink (DL).
  • UL uplink
  • DL downlink
  • the network device in FIG. 1 may be an access network device, such as a base station.
  • the access network device in different systems corresponding to different devices for example, in the fourth generation mobile communication technology (the 4 th generation, 4G) system, the eNB may correspond, a corresponding access network device 5G 5G in the system, For example, gNB.
  • the network device may provide services for multiple terminal devices, and the embodiment of the present application does not limit the number of terminal devices in the communication system.
  • the terminal device in FIG. 1 is described using a mobile phone as an example, and it should be understood that the terminal device in the embodiment of the present application is not limited to this.
  • Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • the terminal device may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal device may be a handheld device with a wireless connection function, a vehicle-mounted device, etc.
  • terminal devices are: mobile phones, tablet computers, laptops, palmtop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented Augmented reality (AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, and smart grid (smart grid)
  • MID mobile internet devices
  • VR virtual reality
  • AR augmented Augmented reality
  • industrial control industrial control
  • wireless terminals in self-driving self-driving
  • wireless terminals in remote medical surgery and smart grid (smart grid)
  • Network equipment is the equipment used in the network to connect terminal equipment to the wireless network.
  • the network device may be a node in a radio access network, may also be called a base station, or may also be called a radio access network (RAN) node (or device).
  • the network device can be used to convert received air frames and Internet Protocol (IP) packets to each other, and act as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network.
  • IP Internet Protocol
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the new radio (NR) system of the fifth generation mobile communication technology (5G), or it can also include the transmission reception point.
  • NodeB or eNB or e-NodeB, evolutional Node B in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the new radio (NR) system of the fifth generation mobile communication technology (5G), or it can also include the transmission reception point.
  • LTE long term evolution
  • LTE-A evolved LTE system
  • gNB next generation node B
  • NR new radio
  • TRP home base station
  • BBU baseband unit
  • WiFi access point access point, AP
  • CU centralized unit
  • DU distributed unit
  • the demodulation reference signal DMRS refers to the reference signal used for demodulation at the receiving end. Due to the fading characteristics of the wireless channel, the signal carried on the resource element (RE) will be distorted after being transmitted through the channel, and the signal distortion is reflected in the signal coefficient. In order to be able to recover the signal at the receiving end, the signal coefficients need to be estimated. Demodulation reference signal is one of the methods. It means that the transmitting end transmits a known signal on a specific RE. The receiving end estimates the channel coefficients based on the received signal and the known signal, and uses the estimated channel coefficients to calculate the data. The signal is received and demodulated. As shown in Figure 2, when a network device sends a physical downlink shared channel PDSCH carrying downlink data information to a terminal device, it will simultaneously send a DMRS corresponding to the PDSCH.
  • Synchronization signal/broadcast channel block SSB includes primary synchronization signal (primary synchronization signal, PSS), secondary synchronization signal (secondary synchronization signal, SSS) and physical broadcast channel (physical broadcast channel, PBCH).
  • Primary synchronization signal primary synchronization signal
  • secondary synchronization signal secondary synchronization signal
  • PBCH physical broadcast channel
  • One SSB occupies 4 consecutive OFDM symbols in the time domain and 240 consecutive sub-carriers in the frequency domain.
  • the 240 sub-carriers are numbered from 0 to 239.
  • a resource block includes 12 consecutive subcarriers, and the 12 subcarriers are numbered from 0 to 11, so 240 subcarriers occupied by an SSB are included in 20 resource blocks, and the 20 resource blocks are numbered from 0 to 19 .
  • the first OFDM symbol from the left in the SSB is used to carry PSS, and the occupied subcarriers are subcarriers numbered 56 to 182.
  • the remaining subcarriers in this OFDM symbol are set to 0, that is, numbered 0
  • the subcarriers to 55 and the subcarriers numbered 183 to 239 are set to 0.
  • the second OFDM symbol and the fourth OFDM symbol from the left are used to carry the PBCH, and one of every four consecutive subcarriers is a DMRS corresponding to the PBCH.
  • the third OFDM symbol from the left is used to carry SSS and PBCH.
  • the subcarriers numbered 56 to 182 are used to carry SSS, and the subcarriers numbered 1 to 47 and 192 to 239 are used to carry PBCH.
  • the remaining word carriers in the symbol are set to 0.
  • the downlink data channel is used to carry downlink data information.
  • it is a physical downlink shared channel (PDSCH), or an enhanced physical downlink control channel (EPDSCH), or may be other downlink control channels.
  • PDSCH physical downlink shared channel
  • EPDSCH enhanced physical downlink control channel
  • the downlink data channel is introduced using PDSCH as an example.
  • “Multiple” refers to two or more. In view of this, “multiple” may also be understood as “at least two” in the embodiments of the present application. "At least one” can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C are included. In the same way, the understanding of "at least one" and other descriptions is similar.
  • FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • the method includes the following steps S401 to S402:
  • Step S401 The terminal device receives first indication information from the network device.
  • the first indication information is used to indicate a first time-frequency resource
  • the first time-frequency resource is a time-frequency resource used to carry downlink data.
  • the first time-frequency resource may be a downlink data channel (such as PDSCH) occupied time-frequency resources.
  • the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource.
  • the time-frequency resource occupied by the DMRS corresponding to the above-mentioned PDSCH may be the second time-frequency resource.
  • the first indication information may only be used to indicate the first time-frequency resource, or the first indication information may also be used to indicate the first time-frequency resource and the second time-frequency resource.
  • Fig. 5a exemplarily shows the first time-frequency resource and the second time-frequency resource in an embodiment of the present application.
  • the first time-frequency resource can be used to carry the PDSCH, and the time-domain range corresponding to the first time-frequency resource is the first time segment, and the terminal device can receive the PDSCH from the network device in the first time segment;
  • the second time-frequency resource can be used to carry the DMRS corresponding to the PDSCH, and the time-domain range corresponding to the second time-frequency resource is the second time segment, and the terminal device can receive the DMRS corresponding to the PDSCH from the network device in the second time segment .
  • the first time segment includes 10 OFDM symbols
  • the second time segment includes 2 OFDM symbols.
  • the number of OFDM symbols included in the segment is not specifically limited.
  • the first indication information can be carried in the downlink control information (DCI) carried on the physical downlink control channel (PDCCH), or can also be carried in the media intervention control In the (media access control, MAC) layer signaling, or the radio resource control (radio resource control, RRC) signaling, this application is not limited.
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • RRC radio resource control
  • Step S402 If the second time-frequency resource overlaps the third time-frequency resource, the terminal device receives downlink data from the network device on the fourth time-frequency resource.
  • the third time-frequency resource may be a time-frequency resource used to carry a synchronization signal and/or a broadcast channel block SSB, or may also be a reserved time-frequency resource.
  • the reserved time-frequency resources refer to time-frequency resources not used to carry downlink data and/or demodulation reference signals used to decode downlink data, that is, time-frequency resources not used to carry PDSCH and/or DMRS corresponding to PDSCH .
  • the second time-frequency resource is a time-frequency resource used to carry DMRS, and the second time-frequency resource may overlap with the third time-frequency resource in the time domain. If the second time-frequency resource and the third time-frequency resource overlap in the time domain, the frequency domain range where the second time-frequency resource and the third time-frequency resource overlap are recorded as the first frequency domain range in the embodiment of the present application. In the case where the second time-frequency resource and the third time-frequency resource overlap in the time domain, the terminal device may receive downlink data from the network device in the fourth time-frequency resource, where the fourth time-frequency resource is the first time-frequency resource Time-frequency resources outside the first frequency domain.
  • the first time-frequency resource is the time-frequency resource indicated by the network device for carrying the PDSCH
  • the second time-frequency resource is the time-frequency resource carrying the DMRS corresponding to the PDSCH
  • the third time-frequency resource is the time-frequency resource carrying the SSB.
  • FIG. 5b exemplarily shows the third time-frequency resource and the fourth time-frequency resource in an embodiment of the present application.
  • the second time-frequency resource and the third time-frequency resource overlap in the time domain
  • the second time-frequency resource and the third time-frequency resource overlap in the frequency domain.
  • Range that is, the first frequency domain range is the frequency domain range occupied by the SSB.
  • the time-frequency resource located in the first frequency domain in the first time-frequency resource is not used to transmit PDSCH
  • the time-frequency resource located outside the first frequency domain in the first time-frequency resource is the fourth Time-frequency resources can be used to transmit PDSCH.
  • the terminal device may only receive the PDSCH from the network device on the fourth time-frequency resource, and accordingly, the network device may only send the PDSCH to the terminal device on the fourth time-frequency resource. Since the network device may not send the PDSCH to the terminal device on the frequency domain resource block without DMRS, it can effectively improve the accuracy of the terminal device to receive the PDSCH and improve the data transmission efficiency.
  • the network equipment schedules the DMRS corresponding to the PDSCH and the PDSCH, the time-frequency resources occupied by the DMRS and the SSB are allowed to overlap, thereby reducing the scheduling complexity of the network equipment and improving the resource utilization of the system.
  • the terminal device can The fifth time-frequency resource receives downlink data from the network device.
  • the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • Fig. 5c exemplarily shows the fifth time-frequency resource in the embodiment of the present application.
  • the time-frequency resource where the first time-frequency resource overlaps with the third time-frequency resource is the time-frequency resource occupied by the SSB
  • the fifth time-frequency resource is the third time-frequency resource excluding the third time-frequency resource occupied by the SSB.
  • Time-frequency resources other than frequency resources.
  • the second time-frequency resource and the third time-frequency resource may completely overlap in the time domain, or may partially overlap in the time domain.
  • the second time-frequency resource and the third time-frequency resource completely overlap in the time domain means that all the time-domain symbols included in the second time-frequency resource overlap with the third time-frequency resource, as shown in FIG. 5b, at this time,
  • the terminal device may receive downlink data from the network device on the fourth time-frequency resource, where the fourth time-frequency resource is a time-frequency resource outside the first frequency domain range in the first time-frequency resource.
  • the network device since the second time-frequency resource and the third time-frequency resource completely overlap in the time domain, the network device may not be able to send DMRS within the first frequency domain.
  • the network device is in the first time-frequency resource.
  • the PDSCH is not transmitted on the time-frequency resources located in the first frequency domain, thereby avoiding the problem that the terminal device cannot correctly decode the PDSCH sent on the time-frequency resources located in the first frequency domain in the first time-frequency resource.
  • the partial overlap of the second time-frequency resource and the third time-frequency resource in the time domain means that there are time-domain symbols in the second time-frequency resource that do not overlap with the third time-frequency resource, as shown in FIG. 5d.
  • the terminal The device may receive downlink data from the network device on a fifth time-frequency resource, where the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the network device can also send part of the DMRS in the frequency domain where the second time-frequency resource and the third time-frequency resource overlap. In this way, the network device can transmit the PDSCH on the time-frequency resource located in the first frequency domain in the first time-frequency resource, so that the terminal device can decode the PDSCH according to the partial DMRS received in the first frequency domain.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • the method includes the following steps S601 to S602:
  • Step S601 The terminal device receives the first indication information from the network device.
  • the first indication information is used to indicate a first time-frequency resource
  • the first time-frequency resource is a time-frequency resource used to carry downlink data.
  • the first time-frequency resource may be a downlink data channel (such as PDSCH) occupied time-frequency resources.
  • the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource.
  • the time-frequency resource occupied by the DMRS corresponding to the above-mentioned PDSCH may be the second time-frequency resource.
  • the first indication information may only be used to indicate the first time-frequency resource, or the first indication information may also be used to indicate the first time-frequency resource and the second time-frequency resource.
  • the first time-frequency resource can be used to carry the PDSCH, and the time-domain range corresponding to the first time-frequency resource is the first time segment, and the terminal device can receive the PDSCH from the network device in the first time segment;
  • the second time-frequency resource can be used to carry the DMRS corresponding to the PDSCH, and the time-domain range corresponding to the second time-frequency resource is the second time segment, and the terminal device can receive the DMRS corresponding to the PDSCH from the network device in the second time segment .
  • the first indication information can be carried in the downlink control information (DCI) carried on the physical downlink control channel (PDCCH), or can also be carried in the media access control (media access control).
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • media access control media access control
  • MAC media access control
  • RRC radio resource control
  • Step S602 If the second time-frequency resource and the third time-frequency resource overlap in the time domain, the terminal device receives the demodulation reference signal from the network device on the sixth time-frequency resource.
  • the third time-frequency resource may be a time-frequency resource used to carry a synchronization signal and/or a broadcast channel block SSB, or may also be a reserved time-frequency resource.
  • the reserved time-frequency resources refer to time-frequency resources not used to carry downlink data and/or demodulation reference signals used for decoding downlink data, that is, it can be understood as time-frequency resources not used to carry PDSCH and/or DMRS corresponding to PDSCH.
  • the second time-frequency resource is the time-frequency resource used to carry DMRS. If the second time-frequency resource and the third time-frequency resource overlap in the time domain, in this embodiment of the application, the second time-frequency resource can be The frequency domain range where the frequency resource overlaps the third time-frequency resource is recorded as the first frequency domain range.
  • the terminal device may receive the DMRS from the network device on the sixth time-frequency resource, and receive the PDSCH from the network device on the eighth time-frequency resource .
  • the sixth time-frequency resource includes the seventh time-frequency resource and the second time-frequency resource except the third time-frequency resource.
  • the eighth time-frequency resource is the first time-frequency resource except the third time-frequency resource. Time-frequency resource and the seventh time-frequency resource.
  • Fig. 7 exemplarily shows the sixth time-frequency resource and the seventh time-frequency resource in the embodiment of the present application.
  • the seventh time-frequency resource is located in the first time-frequency resource, and is the same as the time-domain different frequency domain occupied by the third time-frequency resource. That is, the frequency domain range occupied by the seventh time-frequency resource is also the first frequency domain range, but the number of time-domain symbols occupied by the seventh time-frequency resource may be less than the number of symbols included in the first time segment.
  • the seventh time-frequency resource can also be understood as the time-frequency resource of the DMRS that is additionally sent within the frequency domain where the DMRS cannot be sent because the time-frequency resources occupied by the DMRS and the SSB overlap in the time domain.
  • the terminal device may also receive demodulation reference signals on time-frequency resources other than the third time-frequency resource in the second time-frequency resource.
  • the network device can additionally send DMRS to the terminal device on the time-frequency resource located in the first frequency domain in the first time-frequency resource, which can effectively avoid the overlap between the second time-frequency resource and the third time-frequency resource.
  • the network equipment cannot send DMRS, and the terminal equipment cannot correctly demodulate the PDSCH sent on the time-frequency resource located in the first frequency domain in the first time-frequency resource, thereby improving the terminal equipment’s ability to receive PDSCH. Correct rate.
  • the terminal device can use the fifth time-frequency resource
  • the fifth time-frequency resource is a time-frequency resource other than the third time-frequency resource in the first time-frequency resource, as shown in FIG. 5c.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • the method includes the following steps S801 to S802:
  • Step S801 The terminal device receives the first indication information from the network device.
  • the first indication information is used to indicate a first time-frequency resource
  • the first time-frequency resource is a time-frequency resource used to carry downlink data.
  • the first time-frequency resource may be a downlink data channel (such as PDSCH) occupied time-frequency resources.
  • the time-frequency resource used to carry the demodulation reference signal for demodulating the downlink data is the second time-frequency resource.
  • the time-frequency resource occupied by the DMRS corresponding to the above-mentioned PDSCH may be the second time-frequency resource.
  • the first indication information may only be used to indicate the first time-frequency resource, or the first indication information may also be used to indicate the first time-frequency resource and the second time-frequency resource.
  • the first time-frequency resource and the second time-frequency resource can be shown in Figure 5a.
  • the first time-frequency resource can be used to carry the PDSCH, and the time domain range corresponding to the first time-frequency resource is the first time segment.
  • the PDSCH is received from the network device in the first time segment;
  • the second time-frequency resource can be used to carry the DMRS corresponding to the PDSCH, and the time domain range corresponding to the second time-frequency resource is the second time segment, and the terminal device can be in the second time segment.
  • the first indication information can be carried in the downlink control information (DCI) carried on the physical downlink control channel (PDCCH), or can also be carried in the media access control (media access control).
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • media access control media access control
  • MAC media access control
  • RRC radio resource control
  • Step 802 If the second time-frequency resource and the third time-frequency resource overlap in the time domain, and the precoding granularity of the downlink data is smaller than the bandwidth of the first time-frequency resource, the terminal device obtains data from the network device on the fourth time-frequency resource. Receive downlink data.
  • the third time-frequency resource may be a time-frequency resource used to carry a synchronization signal and/or a broadcast channel block SSB, or may also be a reserved time-frequency resource.
  • the reserved time-frequency resources refer to time-frequency resources not used to carry downlink data and/or demodulation reference signals used to decode downlink data, that is, time-frequency resources not used to carry PDSCH and/or DMRS corresponding to PDSCH .
  • the second time-frequency resource is a time-frequency resource used to carry DMRS, and the second time-frequency resource may overlap with the third time-frequency resource in the time domain. If the second time-frequency resource and the third time-frequency resource overlap in the time domain, the frequency domain range where the second time-frequency resource and the third time-frequency resource overlap are recorded as the first frequency domain range in the embodiment of the present application.
  • the fourth time-frequency resource is a time-frequency resource located outside the first frequency domain in the first time-frequency resource.
  • the network device when it sends the PDSCH or the DMRS corresponding to the PDSCH to the terminal device, it can precode the signal, and precoding can also be understood as a kind of signal preprocessing. Considering that the quality of the wireless channel at different frequency domain locations is different, the network device may use different precoding granularity for different frequency domain resources.
  • the precoding granularity can be 2 resource blocks, 4 resource blocks, etc., several resource blocks smaller than the PDSCH bandwidth, or it can be all frequency domain resources occupied by the PDSCH bandwidth area.
  • the precoding granularity means that if the precoding granularity is 2 resource blocks, the terminal device can consider that the precoding methods in the two frequency domain resource blocks are the same, and the precoding methods between two different frequency domain resource blocks are different; if The precoding granularity is all frequency domain resources occupied by the PDSCH, and the terminal device can consider that the precoding manners of all frequency domain resource blocks are the same.
  • step S802 if the second time-frequency resource and the third time-frequency resource overlap in the time domain, the network device may not be able to send the DMRS on the time-frequency resource where the second time-frequency resource overlaps the third time-frequency resource . If the precoding granularity of the PDSCH is smaller than the bandwidth of the first time-frequency resource, the terminal device cannot check the network device in the first time-frequency resource based on the DMRS received from the remaining time-frequency resources in the second time-frequency resource except the third time-frequency resource. The PDSCH sent on the time-frequency resource located in the first frequency domain among the time-frequency resources is correctly decoded.
  • the terminal device can only receive the PDSCH sent by the network device on the remaining time-frequency resources outside the first frequency domain in the first time-frequency resource (that is, the fourth time-frequency resource), which can effectively improve the downlink reception of the terminal device.
  • the correct rate of the data channel improves the data transmission efficiency.
  • the terminal device may receive downlink data from the network device on a fifth time-frequency resource other than the third time-frequency resource in the first time-frequency resource.
  • the terminal device Even if the terminal device cannot receive the DMRS on the time-frequency resource where the second time-frequency resource overlaps the third time-frequency resource, since the precoding granularity of the PDSCH is equal to all the frequency domain resources occupied by the PDSCH, the terminal device
  • the DMRS received in the time-frequency resources other than the third time-frequency resource in the second time-frequency resource can also correctly decode the PDSCH sent on the time-frequency resource in the first frequency domain in the first time-frequency resource, thereby It can improve the accuracy of the terminal equipment receiving the downlink data channel and improve the data transmission efficiency.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • the communication device 900 includes a transceiver module 910 and a processing module 920.
  • the communication device can be used to implement the functions related to terminal equipment in any of the foregoing method embodiments.
  • the communication device may be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the communication device may also be a chip included in the terminal device, or a device including the terminal device, such as various types of vehicles.
  • the processing module 920 is configured to use the transceiver module when the second time-frequency resource and the third time-frequency resource overlap in the time domain.
  • 910 receives downlink data from the network device on the fourth time-frequency resource; the transceiver module 910 is configured to receive the first indication information from the network device and receive the demodulation reference signal.
  • the processing module 920 is configured to transmit and receive data when the second time-frequency resource and the third time-frequency resource overlap in the time domain.
  • the module 910 receives the demodulation reference signal from the network device on the sixth time-frequency resource; the transceiver module 910 is configured to receive the first indication information from the network device and receive downlink data.
  • the processing module 920 is configured to overlap the second time-frequency resource and the third time-frequency resource in the time domain, and pre-determine the downlink data.
  • the transceiver module 910 receives downlink data from the network device on the fourth time-frequency resource; the transceiver module 910 is configured to receive the first indication information from the network device, and Demodulate the reference signal.
  • the processing module 920 involved in the communication device may be implemented by a processor or processor-related circuit components, and the transceiver module 910 may be implemented by a transceiver or transceiver-related circuit components.
  • the operations and/or functions of the various modules in the communication device are used to implement the corresponding procedures of the methods shown in FIG. 4, FIG. 6, and FIG. 8. For the sake of brevity, details are not repeated here.
  • FIG. 10 is a schematic diagram of another structure of a communication device provided in an embodiment of the application.
  • the communication device may specifically be a terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal device includes a processor, and may also include a memory, and of course, it may also include a radio frequency circuit, an antenna, an input and output device, and the like.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • only one memory and processor are shown in FIG. 10. In actual terminal equipment products, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with the transceiver function can be regarded as the transceiver unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1010 and a processing unit 1020.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1010 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1010 as the sending unit, that is, the transceiver unit 1010 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 1010 is used to perform sending and receiving operations on the terminal device side in the foregoing method embodiment
  • processing unit 1020 is used to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.
  • FIG. 11 is a schematic structural diagram of another communication device provided in an embodiment of the present application.
  • the communication device 1100 includes a transceiver module 1110 and a processing module 1120.
  • the communication device can be used to implement the functions related to network equipment in any of the foregoing method embodiments.
  • the communication device may be a network device or a chip included in the network device.
  • the transceiver module 1110 When the communication device is used as a network device and the method embodiment shown in FIG. 4 is executed, the transceiver module 1110 is used to send the first indication information to the terminal device; the processing module 1120 is used to communicate between the second time-frequency resource and the third When time-frequency resources overlap in the time domain, the transceiver module 1110 sends downlink data to the terminal device on the fourth time-frequency resource.
  • the transceiver module 1110 When the communication device is used as a network device and the method embodiment shown in FIG. 6 is executed, the transceiver module 1110 is used to send the first indication information to the terminal device; the processing module 1120 is used to communicate between the second time-frequency resource and the third When time-frequency resources overlap in the time domain, the transceiver module 1110 sends a demodulation reference signal to the terminal device on the sixth time-frequency resource.
  • the transceiver module 1110 When the communication device is used as a network device and the method embodiment shown in FIG. 8 is executed, the transceiver module 1110 is used to send the first indication information to the terminal device; the processing module 1120 is used to communicate between the second time-frequency resource and the third When the time-frequency resources overlap in the time domain and the precoding granularity of the downlink data is smaller than the bandwidth of the first time-domain resource, the transceiver module 1110 sends the downlink data to the terminal device on the fourth time-frequency resource.
  • processing module 1120 involved in the communication device may be implemented by a processor or processor-related circuit components
  • transceiver module 1110 may be implemented by a transceiver or transceiver-related circuit components.
  • the operation and/or function of each module in the communication device is to realize the corresponding process of the method shown in Fig. 4, Fig. 6, and Fig. 8. For the sake of brevity, it will not be repeated here.
  • FIG. 12 is another schematic structural diagram of another communication device provided in an embodiment of this application.
  • the communication device may specifically be a type of network equipment, such as a base station, for implementing the functions of the network equipment in any of the foregoing method embodiments.
  • the network equipment includes: one or more radio frequency units, such as a remote radio unit (RRU) 1201 and one or more baseband units (BBU) (also known as digital units, digital units, DU) ) 1202.
  • the RRU 1201 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 12011 and a radio frequency unit 12012.
  • the RRU 1201 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals and baseband signals.
  • the part of the BBU 1202 is mainly used to perform baseband processing and control the base station.
  • the RRU 1201 and the BBU 1202 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1202 is the control center of the base station, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading.
  • the BBU (processing unit) 1202 may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
  • the BBU 1202 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network (such as an LTE network) with a single access indication, or may respectively support different access standards. Wireless access network (such as LTE network, 5G network or other networks).
  • the BBU 1202 may further include a memory 12021 and a processor 12022, and the memory 12021 is used to store necessary instructions and data.
  • the processor 12022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the sending operation in the foregoing method embodiment.
  • the memory 12021 and the processor 12022 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • An embodiment of the present application also provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor, the The chip system implements the method in any of the foregoing method embodiments.
  • processors in the chip system there may be one or more processors in the chip system.
  • the processor can be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips.
  • the setting method of the processor is not specifically limited.
  • the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC). It can also be a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (microcontroller).
  • the controller unit, MCU may also be a programmable controller (programmable logic device, PLD) or other integrated chips.
  • each step in the foregoing method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the embodiment of the present application also provides a computer-readable storage medium, which stores computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute any of the foregoing method embodiments Method in.
  • the embodiments of the present application also provide a computer program product.
  • the computer reads and executes the computer program product, the computer is caused to execute the method in any of the foregoing method embodiments.
  • the embodiments of the present application also provide a communication system, which includes a network device and at least one terminal device described in each of the foregoing method embodiments.
  • processors mentioned in the embodiments of this application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), or application specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

L'invention concerne un procédé et un appareil de communication. Dans le procédé de communication, un dispositif terminal reçoit des premières informations d'indication en provenance d'un dispositif de réseau, les premières informations d'indication indiquant des premières ressources temps-fréquence qui portent des données de liaison descendante, et une ressource temps-fréquence utilisée pour porter un signal de référence de démodulation pour démoduler les données de liaison descendante étant une seconde ressource temps-fréquence ; si la seconde ressource temps-fréquence chevauche une troisième ressource temps-fréquence dans le domaine temporel, alors le dispositif terminal reçoit des données de liaison descendante en provenance du dispositif de réseau sur une quatrième ressource temps-fréquence, la troisième ressource temps-fréquence comprenant une ou plusieurs ressources temps-fréquence parmi une ressource temps-fréquence utilisée pour porter un signal de synchronisation, une ressource temps-fréquence qui porte un bloc de canal de diffusion, ou une ressource temps-fréquence réservée, et la quatrième ressource temps-fréquence étant une ressource temps-fréquence dans les premières ressources temps-fréquence qui est située à l'extérieur d'une première plage de fréquences, la région de fréquence occupée par la première plage de fréquences étant la même que celle de la troisième ressource temps-fréquence. Le dispositif terminal peut uniquement recevoir des données de liaison descendante dans une plage de domaine de fréquence sur laquelle le dispositif de réseau peut envoyer un signal de démodulation, et ainsi la précision de réception de données de liaison descendante par le dispositif terminal peut être efficacement améliorée.
PCT/CN2020/085216 2019-04-26 2020-04-16 Procédé et appareil de communication WO2020216130A1 (fr)

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