WO2021164023A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2021164023A1
WO2021164023A1 PCT/CN2020/076264 CN2020076264W WO2021164023A1 WO 2021164023 A1 WO2021164023 A1 WO 2021164023A1 CN 2020076264 W CN2020076264 W CN 2020076264W WO 2021164023 A1 WO2021164023 A1 WO 2021164023A1
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WO
WIPO (PCT)
Prior art keywords
information
qcl
parameters
qcl parameters
indicate
Prior art date
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PCT/CN2020/076264
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English (en)
Chinese (zh)
Inventor
刘显达
李雪茹
Original Assignee
华为技术有限公司
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.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/076264 priority Critical patent/WO2021164023A1/fr
Priority to CN202080097288.2A priority patent/CN115152174A/zh
Publication of WO2021164023A1 publication Critical patent/WO2021164023A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • This application relates to the field of communication, and in particular to a communication method and device.
  • the base station indicates the transmission control indication (TCI) state (transmission control indication, TCI) adopted by the currently scheduled data channel through signaling.
  • TCI transmission control indication
  • Each TCI state includes a quasi co-location (QCL) relationship (QCL relationship) between a demodulation reference signal (demodulation reference signal, DMRS) port and a reference signal port.
  • QCL relationship QCL relationship
  • the base station can indicate the QCL parameters to the terminal device so that the terminal device can receive the DMRS.
  • the base station pre-issues one or more reference signals
  • the terminal device determines QCL parameters through one or more reference signal ports, and through the determined QCL parameters, the terminal device receives the DMRS port signal for data demodulation.
  • the receiving performance of DMRS needs to be improved.
  • the channel has large time-varying characteristics, and there is a delay in channel measurement, the success rate of DMRS reception decreases, resulting in impaired data transmission performance.
  • This application provides a communication method and device for improving data transmission performance.
  • this application provides a communication method.
  • This method can be executed by a network device or a chip in the network device.
  • the network equipment is a wireless access network equipment such as a base station.
  • the network device can determine (or obtain) and send the first information to the terminal device.
  • the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the network device can also send DMRS through the DMRS port.
  • the network device can configure the terminal device with multiple QCL parameters associated with the DMRS port of the first resource. Therefore, on the first resource, the terminal device can obtain an equivalent QCL parameter based on multiple QCL parameters.
  • the equivalent QCL parameter can accurately reflect the channel state, thereby performing channel estimation on the DMRS port based on the equivalent QCL parameter, and according to the channel
  • the estimated structure performs data reception to improve the robustness of data reception on the first resource.
  • the multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter).
  • the first QCL parameter includes one or more of Doppler frequency offset, Doppler spread, delay spread, or average delay.
  • the second QCL parameters may include spatial reception parameters or spatial reception beamforming parameters.
  • the first information may include TCI status information.
  • the one TCI status information can be used to indicate multiple QCL parameters.
  • the network device may also send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the TCI state may include one or more TCI states
  • the QCL parameter may include one or more QCL parameters
  • the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states
  • One or more of the QCL parameters correspond.
  • One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.
  • the second information is used to indicate the correspondence between one or more TCI states and one or more QCL parameters, so that a TCI state and a QCL parameter corresponding to the TCI state can be determined according to the one TCI state information.
  • the network device may also send third information to the terminal device.
  • the third information is used to indicate the correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device can associate the first QCL with the second QCL parameter, so as to perform the channel according to the associated QCL parameter estimate.
  • the agreement stipulates the correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters.
  • the first information may include multiple TCI status information, where one of the multiple TCI status information is used to indicate one of the multiple first QCL parameters.
  • any one of the multiple TCI status information may indicate one of the multiple first QCL parameters, or each TCI status information of the multiple TCI status information indicates one of the multiple first QCL parameters one.
  • the first information may be specifically used to indicate one or more first downlink reference signals, and the one or more first downlink reference signals are associated with the plurality of first QCL parameters.
  • the one or more first downlink reference signals and the DMRS have the same first QCL parameter.
  • one or more first downlink reference signals and DMRS are QCL under the first QCL parameter.
  • at least one of the one or more first downlink reference signals may also be associated with one or more second QCL parameters.
  • at least one of the one or more first downlink reference signals has the same second QCL parameter as the DMRS.
  • at least one of the one or more first downlink reference signals and the DMRS are QCL under the first QCL parameter.
  • the first information may also indicate one or more second downlink reference signals, and the one or more second downlink reference signals may be associated with one or more second QCL parameters.
  • the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters.
  • one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.
  • the DMRS receiving algorithm is determined according to the first information, or the minimum scheduling delay from DCI to PDSCH is determined according to the first information.
  • the receiving algorithm of the first downlink reference signal is determined according to the first information.
  • this application provides a communication method.
  • the method can be executed by a terminal device or a chip in the terminal device.
  • the terminal device can receive the first information from the network device, and the first information is used to indicate a plurality of QCL parameters of the DMRS port on the first resource.
  • the terminal device can receive the DMRS through the DMRS port according to the first information.
  • the multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter).
  • the first QCL parameter includes one or more of Doppler frequency offset, Doppler spread, delay spread, or average delay.
  • the second QCL parameters may include spatial reception parameters or spatial reception beamforming parameters.
  • the first information may include TCI status information.
  • the one TCI status information can be used to indicate multiple QCL parameters.
  • the terminal device may also receive second information sent from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the TCI state may include one or more TCI states
  • the QCL parameter may include one or more QCL parameters
  • the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states
  • One or more of the QCL parameters correspond.
  • One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.
  • the terminal device can also receive from the network device.
  • the third information is used to indicate the correspondence between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device can associate the first QCL with the second QCL parameter, so as to perform the channel according to the associated QCL parameter estimate.
  • the first information may include multiple TCI status information, where one of the multiple TCI status information can be used to indicate one of the multiple first QCL parameters.
  • the first information may be specifically used to indicate one or more first downlink reference signals, and the one or more first downlink reference signals are associated with the plurality of first QCL parameters.
  • the one or more first downlink reference signals and the DMRS have the same first QCL parameter.
  • one or more first downlink reference signals and DMRS are QCL under the first QCL parameter.
  • at least one of the one or more first downlink reference signals may also be associated with one or more second QCL parameters.
  • at least one of the one or more first downlink reference signals has the same second QCL parameter as the DMRS.
  • at least one of the one or more first downlink reference signals and the DMRS are QCL under the first QCL parameter.
  • the first information may also indicate one or more second downlink reference signals, and the one or more second downlink reference signals may be associated with one or more second QCL parameters.
  • the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters.
  • one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.
  • an embodiment of the present application provides a communication method.
  • This method can be executed by a network device or a chip in the network device.
  • the network equipment is a wireless access network equipment such as a base station.
  • the network device can determine (or obtain) and send the first information to the terminal device.
  • the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • each group of DMRS ports in the multiple groups of DMRS ports corresponds to one of multiple QCL parameters
  • each group of DMRS ports includes at least one DMRS port.
  • the network device may also send a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the network device can configure multiple QCL parameters associated with multiple groups of DMRS ports to the terminal device, and multiple DMRS ports in each group of DMRS are commonly used for channel estimation of one PDSCH port. Therefore, the terminal equipment can obtain the channel estimation results of multiple DMRS ports according to multiple DMRS ports for one PDSCH port, and perform operations such as combining and averaging the multiple channel estimation results for the data layer reception of the PDSCH port to improve Channel estimation performance.
  • the multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter).
  • the first QCL parameter includes one or more of Doppler frequency offset, Doppler spread, delay spread, or average delay.
  • the second QCL parameters may include spatial reception parameters or spatial reception beamforming parameters.
  • the first information may include one TCI status information, and the one TCI status information can be used to indicate the multiple QCL parameters.
  • the network device may also send second information, where the second information is used to indicate the corresponding relationship between the TCI status and the QCL parameter.
  • the TCI state may include one or more TCI states
  • the QCL parameter may include one or more QCL parameters
  • the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states
  • One or more of the QCL parameters correspond.
  • One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.
  • the network device may also send third information to the terminal device.
  • the third information may be used to indicate the correspondence between the multiple first QCL parameters and the multiple second QCL parameters, so that the terminal device associates the first QCL and the second QCL parameters, so as to perform channel estimation according to the associated QCL parameters.
  • the first information includes multiple TCI status information
  • one of the multiple TCI status information may be used to indicate one of the multiple first QCL parameters.
  • the first information may be specifically used to indicate a plurality of first downlink reference signals, and the plurality of first downlink reference signals are associated with the plurality of first QCL parameters.
  • the multiple first downlink reference signals and the DMRS have the same first QCL parameter.
  • the multiple first downlink reference signals and DMRS are QCL under the first QCL parameter.
  • at least one of the plurality of first downlink reference signals may also be associated with one or more second QCL parameters.
  • at least one of the plurality of first downlink reference signals has the same second QCL parameter as the DMRS.
  • at least one of the plurality of first downlink reference signals and the DMRS are QCL under the first QCL parameter.
  • the first information may also indicate one or more second downlink reference signals, and the one or more second downlink reference signals may be associated with one or more second QCL parameters.
  • the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters.
  • one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.
  • this application provides a communication method.
  • the method can be executed by a terminal device or a chip in the terminal device.
  • the terminal device can receive the first information from the network device.
  • the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • each group of DMRS ports in the multiple groups of DMRS ports corresponds to one of multiple QCL parameters
  • each group of DMRS ports includes at least one DMRS port.
  • the device can also receive the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the multiple QCL parameters of the above DMRS port may include multiple first QCL parameters (such as parameters corresponding to QCL type A), or multiple first QCL parameters and one or more second QCL parameters (such as QCL type D corresponding parameters). parameter).
  • the first QCL parameter includes one or more of Doppler frequency offset, Doppler spread, delay spread, or average delay.
  • the second QCL parameters may include spatial reception parameters or spatial reception beamforming parameters.
  • the first information may include one TCI status information, and the one TCI status information can be used to indicate the multiple QCL parameters.
  • the terminal device may receive second information from the network device, where the second information is used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the TCI state may include one or more TCI states
  • the QCL parameter may include one or more QCL parameters
  • the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states
  • One or more of the QCL parameters correspond.
  • One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.
  • the terminal device may receive the third information from the network device.
  • the third information may be used to indicate the correspondence between the multiple first QCL parameters and the multiple second QCL parameters, so that the terminal device associates the first QCL and the second QCL parameters, so as to perform channel estimation according to the associated QCL parameters.
  • the first information includes multiple TCI status information
  • one of the multiple TCI status information may be used to indicate one of the multiple first QCL parameters.
  • the first information may be specifically used to indicate a plurality of first downlink reference signals, and the plurality of first downlink reference signals are associated with the plurality of first QCL parameters.
  • the multiple first downlink reference signals and the DMRS have the same first QCL parameter.
  • the multiple first downlink reference signals and DMRS are QCL under the first QCL parameter.
  • at least one of the plurality of first downlink reference signals may also be associated with one or more second QCL parameters.
  • at least one of the plurality of first downlink reference signals has the same second QCL parameter as the DMRS.
  • at least one of the plurality of first downlink reference signals and the DMRS are QCL under the first QCL parameter.
  • the first information may also indicate one or more second downlink reference signals, and the one or more second downlink reference signals may be associated with one or more second QCL parameters.
  • the one or more second downlink reference signals and the DMRS have the same second QCL parameters, so one or more second downlink reference signals may also pass the second QCL parameters.
  • one or more second downlink reference signals and DMRS are QCL under the second QCL parameter.
  • this application provides a communication device.
  • the communication device can be used to implement the functions involved in the first aspect or any one of the possible designs of the first aspect. This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions or method steps or operations in the above-mentioned first aspect and any of its designs.
  • the communication device may be a terminal device or a chip in a terminal device.
  • the communication device may include a communication module (or called a communication unit) and a processing module (or called a processing unit).
  • the communication module can be used for the communication device to communicate
  • the processing module can be used for the communication device to realize the processing function of the communication device.
  • the processing module may be used to determine the first information.
  • the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the communication module can be used to send the first information to the terminal device.
  • the communication module can also be used to send DMRS through the DMRS port.
  • the communication module may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the first aspect.
  • the communication module may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information in the first aspect.
  • the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit).
  • the processor can be used to call program instructions to perform the processing functions of the communication device.
  • the communication module can be used for communication with the communication device.
  • the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.
  • the processor may be used to determine the first information.
  • the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the transceiver can be used to send the first information to the terminal device.
  • the transceiver can also be used to send DMRS through the DMRS port.
  • the above first information refer to the description of the first information in the first aspect.
  • the transceiver may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the first aspect.
  • the communication module may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information in the first aspect.
  • this application provides a communication device.
  • the communication device can be used to implement the above-mentioned second aspect or the functions involved in any possible design of the second aspect.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions or method steps or operations in the second aspect and any of its designs.
  • the communication device may be a network device or a chip in a network device.
  • the communication device may include a communication module (or called a communication unit) and a processing module (or called a processing unit).
  • the communication module can be used for the communication device to communicate
  • the processing module can be used for the communication device to realize the processing function of the communication device.
  • the communication module may be used to receive first information from the network device, and the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the communication module can also be used to receive DMRS through the DMRS port.
  • first information refer to the description of the first information in the second aspect.
  • the communication module may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the second aspect.
  • the communication module may also be used to receive third information from the network device.
  • third information refer to the description of the third information in the second aspect.
  • the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit).
  • the processor can be used to call program instructions to perform the processing functions of the communication device.
  • the communication module can be used for communication with the communication device.
  • the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.
  • the transceiver may be used to receive first information from the network device, and the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the transceiver can also be used to receive DMRS through the DMRS port.
  • first information refer to the description of the first information in the second aspect.
  • the transceiver may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the second aspect.
  • the transceiver may also be used to receive third information from the network device.
  • the third information refer to the description of the third information in the second aspect.
  • the present application provides a communication device.
  • the communication device can be used to implement the functions involved in the third aspect or any one of the possible designs of the third aspect. This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions or method steps or operations in the above third aspect and any of its designs.
  • the communication device may be a terminal device or a chip in a terminal device.
  • the communication device may include a communication module (or called a communication unit) and a processing module (or called a processing unit).
  • the communication module can be used for the communication device to communicate
  • the processing module can be used for the communication device to realize the processing function of the communication device.
  • the processing module may be used to determine the first information.
  • the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the communication module can be used to send the first information to the terminal device.
  • the communication module can also be used to send PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the first information refer to the description of the first information in the third aspect.
  • the communication module may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the third aspect.
  • the communication module may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information in the third aspect.
  • the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit).
  • the processor can be used to call program instructions to perform the processing functions of the communication device.
  • the communication module can be used for communication with the communication device.
  • the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.
  • the processor may be used to determine the first information.
  • the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the transceiver can be used to send the first information to the terminal device.
  • the transceiver can also be used to transmit the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the first information refer to the description of the first information in the third aspect.
  • the transceiver may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the third aspect.
  • the transceiver may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information in the third aspect.
  • this application provides a communication device.
  • the communication device can be used to implement the functions involved in the fourth aspect or any one of the possible designs of the fourth aspect.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions or method steps or operations in the fourth aspect and any one of its designs.
  • the communication device may be a network device or a chip in a network device.
  • the communication device may include a communication module (or called a communication unit) and a processing module (or called a processing unit).
  • the communication module can be used for the communication device to communicate
  • the processing module can be used for the communication device to realize the processing function of the communication device.
  • the communication module may be used to receive first information from the network device, and the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the communication module can also be used to receive the PDSCH through the DMRS port, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • first information please refer to the description of the first information in the second aspect.
  • the communication module may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the second aspect.
  • the communication module may also be used to receive third information from the network device.
  • third information refer to the description of the third information in the second aspect.
  • the communication device may include a processor (or a processing chip or a processing circuit) and a transceiver (or a communication circuit).
  • the processor can be used to call program instructions to perform the processing functions of the communication device.
  • the communication module can be used for communication with the communication device.
  • the program instructions may be stored in the memory, and the memory may be used as a part of the communication device, and the communication device may also include a memory; or, the memory may be externally connected to the communication device and connected to the processor and/or transceiver.
  • the transceiver may be used to receive first information from the network device, and the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the transceiver can also be used to receive the PDSCH through the DMRS port, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • first information refer to the description of the first information in the second aspect.
  • the transceiver may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information in the second aspect.
  • the transceiver may also be used to receive third information from the network device.
  • the third information refer to the description of the third information in the second aspect.
  • this application provides a communication system.
  • the communication system may include a communication device for implementing any possible design of the foregoing first aspect or the first aspect, and a communication device for implementing any possible design of the foregoing second aspect or the second aspect.
  • Communication device may include a communication device for implementing any possible design of the third aspect or the third aspect, and a communication device for implementing any possible design of the fourth aspect or the fourth aspect.
  • the communication system may include the communication device of the fifth aspect and the communication device of the sixth aspect.
  • the communication system may include the communication device of the seventh aspect and the communication device of the eighth aspect.
  • the communication system may include a network device and a terminal device, so as to implement the methods shown in the foregoing first aspect and the foregoing second aspect.
  • the network device can be used to determine (or obtain) and send the first information to the terminal device.
  • the first information may be used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the terminal device can receive the first information.
  • the network device can also send DMRS through the DMRS port. Accordingly, the terminal device can receive the DMRS.
  • the communication system may include a network device and a terminal device, so as to implement the methods shown in the foregoing third aspect and the foregoing fourth aspect.
  • the network device can be used to determine (or obtain) and send the first information to the terminal device.
  • the first information may be used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the terminal device can receive the first information.
  • the network device may also send a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the terminal device can receive the PDSCH.
  • this application provides a computer storage medium, including program instructions.
  • the program instructions When the program instructions are used on a computer, the computer executes any possible design of the first aspect or the first aspect, or the second Any one of the possible designs of the aspect or the second aspect, or any one of the possible designs of the aforementioned third aspect or the third aspect, or any one of the possible designs of the aforementioned fourth aspect or the fourth aspect.
  • an embodiment of the present application provides a computer program product, which when running on a computer, causes the computer to execute any possible design of the first aspect or the first aspect, or the second or second aspect described above. Any one of the possible designs of the aspect, or any one of the possible designs of the above-mentioned third aspect or the third aspect, or any one of the above-mentioned methods of the fourth aspect or the fourth aspect of the possible design.
  • an embodiment of the present application provides a system chip, which may include a processor, and may also include a memory (or the system chip is coupled to the memory), and the system chip executes the program instructions in the memory to Implementation of any possible design of the first aspect or the first aspect, or any possible design of the second or second aspect, or any possible design of the third aspect or the third aspect, or the foregoing
  • the fourth aspect or any one of the possible design methods of the fourth aspect may be any one of the possible design methods of the fourth aspect.
  • coupling refers to that two components are directly or indirectly combined with each other, for example, coupling may refer to electrical connection between two components.
  • FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 3 is a schematic diagram of the application of a communication method provided by an embodiment of this application.
  • FIG. 4 is a schematic diagram of the application of another communication method provided by an embodiment of this application.
  • FIG. 5 is a schematic diagram of the application of another communication method provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram of the application of another communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of the application of another communication method provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram of the application of 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 a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • the wireless communication system 100 provided by the embodiment of the present application includes a terminal device 101 and a network device 102.
  • the application scenarios of the wireless communication system 100 include, but are not limited to, the new radio (NR) system in the 5th generation (5G) mobile communication system of the long term evolution (LTE) system and the future mobile communication System and so on.
  • NR new radio
  • 5G 5th generation
  • LTE long term evolution
  • the terminal device 101 may be a terminal (terminal), a mobile station (mobile station, MS), a mobile terminal (mobile terminal), etc., or a chip, a chip system and other devices.
  • the terminal device 101 can be connected to one or more One or more network devices of the communication system communicate and accept network services provided by the network devices.
  • the network devices here include but are not limited to the network device 102 shown in the figure.
  • the terminal device 101 in the embodiment of the present application may be a mobile phone (or called a "cellular" phone), a computer with a mobile terminal, etc., and the terminal device 101 may also be portable, pocket-sized, handheld, or a built-in computer. , Or on-board mobile devices.
  • the terminal device 101 may also be a communication chip with a communication module. It should be understood that the terminal device 101 may be configured to support communication with a network device through a universal user to network interface (Uu air interface).
  • the terminal device 101 shown above may be a user equipment (UE), a terminal (terminal), an access terminal, a terminal unit, a terminal station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile terminal ( mobile terminal), wireless communication equipment, terminal agent or terminal equipment, etc.
  • the terminal device can have a wireless transceiver function, which can communicate with one or more network devices of one or more communication systems (such as wireless communication), and accept network services provided by the network devices.
  • the network devices here include but are not limited to The network device 102 is shown.
  • the terminal device 101 can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, and Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or terminal devices in the future evolved PLMN network, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the terminal device 101 can be deployed on the land, including indoor or outdoor, handheld or vehicle-mounted; the terminal device can also be deployed on the water (such as ships, etc.); the terminal device 101 can also be deployed in the air (such as airplanes, balloons, and satellites). Wait).
  • the terminal device 101 may specifically be a mobile phone, a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, and an industrial control (industrial control) terminal.
  • Wireless terminals in wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and wireless terminals in transportation safety , Wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the terminal device may also be a communication chip with a communication module, a vehicle with a communication function, or a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), and so on.
  • the network device 102 may be an access network device (or called an access website point).
  • the access network equipment refers to equipment that provides network access functions, such as a radio access network (RAN) base station and so on.
  • the network device 102 may specifically include a base station (base station, BS), or include a base station and a radio resource management device for controlling the base station, and so on.
  • the network device 102 may also include a relay station (relay device), an access point, and a base station in a future 5G network, a base station in a future evolved PLMN network, or an NR base station, etc.
  • the network device 102 may be a wearable device or a vehicle-mounted device.
  • the network device 102 may also be a chip with a communication module. It should be understood that in this application, the network device 102 may support Uu interface communication.
  • the network equipment 102 includes but is not limited to: next-generation base stations (gnodeB, gNB) in 5G, evolved node B (evolved node B, eNB) in LTE system, radio network controller (RNC) , The wireless controller under the CRAN system, base station controller (BSC), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseband unit, BBU), transmission receiving point ( transmitting and receiving point (TRP), transmitting point (TP) or mobile switching center, etc.
  • the network device 102 may also include a base station in a future 6G or newer mobile communication system.
  • the network device 102 can access a core network, such as a 5G core network, to obtain services on the core network side.
  • a core network such as a 5G core network
  • the network device 102 can indicate to the terminal device 101 the time-frequency position of the currently scheduled physical uplink shared channel (PDSCH).
  • the network device 102 can also use the downlink control information (downlink control).
  • information indicates to the terminal device 101 the TCI state adopted by the demodulation reference signal (Demodulation Reference Signal, DMRS) port of the currently scheduled PDSCH.
  • DMRS Demodulation Reference Signal
  • the DCI can carry a TCI indication field to indicate the corresponding TCI status.
  • each TCI state includes the quasi co-location relationship between the DMRS port and the reference signal port.
  • the quasi co-location relationship between the DMRS port and the reference signal port included in each TCI state can be controlled by the radio resource control (RRC) and or media access control (MAC) control unit (control). element, CE) or DCI and other signaling configuration.
  • the network device 102 may configure the type of quasi co-location and the index value of the reference signal under this type.
  • the configuration information indicates that under the type of quasi co-location, the reference signal and the DMRS port have a quasi co-location association relationship, In other words, the quasi co-location of the DMRS port can be obtained based on the reference signal.
  • the terminal device 101 may receive the DMRS according to the quasi co-location parameter under the quasi co-location type A and the quasi co-location parameter under the quasi co-location type D obtained by the reference signal ID1.
  • the DMRS port of the data channel and the reference signal port meet the QCL relationship (or said, the DMRS and the one or more reference signals meet the QCL relationship).
  • the reference signal configured by the configuration information may be a channel state information reference signal (channel state information reference signal, CSI-RS), a tracking reference signal (tracking reference signal, TRS), or a cell common reference signal, and so on.
  • CSI-RS channel state information reference signal
  • TRS tracking reference signal
  • TRS tracking reference signal
  • TCI indicator field Corresponding meaning 000 TCI status 1 001 TCI status 2 ... ... 111 TCI status 7
  • each field value shown in Table 1 may indicate a TCI state, and each TCI state may indicate a quasi co-location relationship between a DMRS port and at least one reference signal port.
  • the types of quasi co-location relationships include QCLtypeA, QCL type B, QCL type C, and QCL type D.
  • the QCL parameters (or QCL assumptions) corresponding to QCL type A include Doppler shift, Doppler spread, delay spread, and average delay.
  • QCL parameters corresponding to QCL type B include Doppler frequency offset and Doppler spread
  • QCL parameters corresponding to QCL type C include Doppler frequency offset and average delay.
  • QCL parameters corresponding to QCL type D include spatial reception parameters (spatial Rx parameters) of the DMRS port or spatial reception beamforming parameters.
  • the Doppler frequency offset, Doppler spread, delay spread, and average delay of the DMRS port are based on The reference signal port 1 is determined.
  • the terminal device 101 first performs signal processing according to the reference signal port 1 to determine the relevant parameters included in QCL type A, then the above parameters of the DMRS port and the above parameter system of the reference signal port, or have a corresponding relationship .
  • the spatial reception parameter or spatial reception beamforming parameter of the DMRS port is determined according to the reference signal port.
  • the terminal device 101 can infer the receiving beam used to receive the data channel and the DMRS.
  • the DMRS port and the PDSCH port or layer are consistent or in one-to-one correspondence. That is, the number of ports or layers of the PDSCH is equal to the number of DMRS ports, and each port or each layer of the PDSCH corresponds to a DMRS port in turn.
  • the terminal device 101 can obtain the channel estimation result according to the DMRS port and use it for the corresponding PDSCH port or layer. Data reception. Then the QCL parameters of the above DMRS port are also applicable to the corresponding PDSCH.
  • the DMRS port is used to define the physical resources that carry the DMRS on the network side.
  • a DMRS port can correspond to a specific time-frequency code domain resource in the network and a DMRS of a specific channel.
  • DMRS port 0 can occupy odd-numbered sub-carriers in the network
  • DMRS port 1 can occupy even-numbered sub-carriers in the network
  • DMRS port 2 can also occupy even-numbered sub-carriers in the network, but it uses different code domain resources from DMRS port 1.
  • DMRS port 0 can be used for PDSCH channel estimation
  • DMRS port 1000 can be used for PDCCH channel estimation, etc.
  • the terminal device 101 can learn the TCI state indicated by the network device 102, and determine the QCL parameter of the DMRS port according to the indicated TCI state, thereby receiving the DMRS according to the QCL parameter.
  • the above scheme of configuring the TCI state and receiving DMRS according to the TCI state can be used in a variety of communication scenarios.
  • the embodiment of the present application provides a communication method for improving data transmission performance. It should be understood that this method can be applied to high-speed mobile communication scenarios such as high-speed rail. However, this application does not limit the application of the communication method to mobile communication scenarios other than high-speed mobile communication scenarios.
  • the method provided by the embodiment of the present application may include the following steps:
  • the network device determines the first information. In other words, the network device obtains the first information.
  • the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the first information may be carried in DCI signaling, or the first information may be DCI.
  • the first resource may be a specific time-frequency domain resource, for example, the first resource is N resource clocks (resource clock, RB) in the frequency domain and N OFDM symbols in the time domain or one of the time domains. Time slot.
  • the first resource may be determined according to the DCI signaling where the first information is located.
  • all DMRS ports carried on the first resource adopt the multiple QCL parameters.
  • the first resource includes the first RB and the second RB
  • the DMRS ports on the first RB and the second RB both use multiple QCL parameters.
  • the first resource includes the first DMRS port and the second DMRS port.
  • the first DMRS port and the second DMRS port both use multiple QCL parameters.
  • the QCL parameter of the DMRS port is used to indicate the QCL assumption used in channel estimation through the DMRS, and the channel estimation performance of the terminal device can be improved by indicating the QCL parameter to the terminal device.
  • the DMRS port corresponds to the physical downlink shared channel PDSCH, that is, the DMRS can be used for channel estimation for PDSCH demodulation, and the DMRS occupies a specific frequency domain position in the PDSCH, for example, can occupy the same bandwidth or occupy the PDSCH A specific time domain position in the middle, for example, may occupy the first K OFDM symbols.
  • the DMRS port corresponds to the physical downlink control channel PDCCH, that is, the DMRS can be used for channel estimation for PDCCH demodulation.
  • the first information may be carried in RRC or MAC CE signaling.
  • the network device sends the first information to the terminal device.
  • the terminal device receives the first information.
  • S103 The network device sends a DMRS through the DMRS port.
  • the network device can configure the terminal device with multiple QCL parameters associated with the DMRS port of the first resource. Therefore, on the first resource, the terminal device can obtain an equivalent QCL parameter based on multiple QCL parameters.
  • the equivalent QCL parameter can accurately reflect the channel state, thereby performing channel estimation on the DMRS port based on the equivalent QCL parameter, and according to the channel
  • the estimated structure performs data reception to improve the robustness of data reception on the first resource.
  • the terminal device 101 can obtain multiple QCL parameters from the network device 102, where the multiple QCL parameters correspond to the DMRS port on the first resource.
  • the channel H through which the terminal device 101 actually receives the DMRS port signal can be expressed as H1+H2+...+Hn, where H1 is determined according to the first QCL parameter Channel, the channel determined by H2 according to the second QCL parameter, and so on.
  • the filter coefficients can be obtained by synthesizing the n QCL parameters, and then the filter coefficients obtained by the synthesis and the obtained channels can be calculated to obtain the channel estimation result, which can be used for corresponding data reception.
  • the terminal device 101 can determine the equivalent QCL parameters based on the n QCL parameters, and then the filter coefficients and frequency offset values used in channel estimation based on the DMRS Or the delay value can be determined according to the equivalent QCL parameter.
  • the above multiple QCL parameters include multiple first QCL parameters, or multiple first QCL parameters and one or more second QCL parameters.
  • the QCL type of the first QCL parameter is different from the QCL type of the second QCL parameter.
  • the first QCL parameter is a QCL parameter corresponding to QCL type A or QCL type B or QCL type A.
  • the second QCL parameter is the QCL parameter corresponding to QCL type D.
  • the first QCL parameter includes Doppler frequency offset, Doppler spread, delay spread, and average delay.
  • the second QCL parameters include spatial reception parameters or spatial reception beamforming parameters.
  • one DMRS port has multiple QCL parameters of QCL type A and one QCL parameter of QCL type D.
  • the terminal device can use a receiving beam to receive the DMRS on the DMRS port, and determine an equivalent Doppler based on multiple Doppler frequency deviation, Doppler spread, delay spread, and average delay parameters. Frequency offset, Doppler spread, delay spread, and average delay parameters are used for channel estimation of DMRS. Therefore, high-precision channel estimation in PDSCH transmission based on a single frequency network (SFN) in a high frequency scenario can be supported.
  • SFN single frequency network
  • the type of each QCL parameter may be the same or different, and the value of each QCL parameter may be the same or different.
  • the multiple QCL parameters may include RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter.
  • RS ID1 under the first QCL parameter is used to indicate the first QCL parameter represented by RS ID1
  • the RS ID2 under the QCL parameter is used to indicate the first QCL parameter represented by the RS ID2
  • the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter may be the first QCL parameter with the same value or different values.
  • RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter may both include parameters such as Doppler frequency offset, Doppler spread, delay spread, and average delay.
  • the value of each parameter in RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter may be the same or different.
  • the Doppler frequency offset included in RS ID1 under the first QCL parameter is the same as that of the first QCL.
  • the Doppler frequency offset included in the RS ID2 under the parameters may be the same or different.
  • the first information includes TCI status information.
  • the TCI status information is used to indicate the multiple QCL parameters.
  • each TCI indicator field can be regarded as a TCI indicator field, which is used to indicate multiple first QCL parameters.
  • the TCI state information may correspond to one of the one or more TCI states configured by the network device 102 to the terminal device 101.
  • the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the TCI state may include one or more TCI states
  • the QCL parameter may include one or more QCL parameters
  • the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states
  • One or more of the QCL parameters correspond.
  • One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.
  • the second information may be indicated by signaling such as RRC, MAC CE, or DCI.
  • the corresponding relationship can be shown in Table 2.
  • the network device can configure the QCL type (ie QCL parameter) included in each TCI state and the reference signal ID included in each QCL type.
  • the TCI state is used to indicate the quasi co-location between the DMRS port and the reference signal. relation.
  • the first QCL parameters corresponding to different RS IDs respectively represent the RS IDs under the first QCL parameters.
  • the first QCL parameters corresponding to RS ID 1 are the first QCL parameters under the first QCL parameter.
  • the RS ID 1 1.
  • each TCI state in Table 2 can correspond to multiple QCL parameters.
  • the terminal device 101 determines the TCI status information according to the first information, it can query Table 2 to determine the multiple QCL parameters indicated by the network device 102. For example, if the TCI status indicated by the TCI status information is TCI status 1, the terminal device 101 can determine that RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter are QCL parameters of the DMRS port on the first resource.
  • the network device 102 may also send the third information to the terminal device 101.
  • the third information may be used to indicate the corresponding relationship between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device 101 associates the first QCL with the second QCL parameter, so as to perform processing according to the associated QCL parameter Channel estimation.
  • the network device also needs to configure RS ID5 under the first QCL parameter and RS ID2 under the second QCL parameter to have an association relationship, RS ID6 under the first QCL parameter and second QCL parameter
  • the RS ID3 under the RS ID3 has an association relationship.
  • the terminal device can use the receiving beam corresponding to the RS ID2 under the second QCL parameter to receive the DMRS signal, and according to the associated RS ID5 under the first QCL parameter and the The DMRS signal determines the channel estimation result 1.
  • the terminal device may use the receiving beam corresponding to the RS ID3 under the second QCL parameter to receive the DMRS signal, and determine the channel estimation result 2 according to the associated RS ID6 under the first QCL parameter and the DMRS signal.
  • the terminal device can receive the PDSCH according to the channel estimation result 1 and the channel estimation result 2.
  • the above third information can be carried in signaling such as RRC, MAC CE, or DCI.
  • the third information and the first information are carried in the same DCI.
  • the corresponding relationship between the multiple first QCL parameters and the multiple second QCL parameters can be predefined.
  • the corresponding relationship is determined according to the order of parameter configuration, and the configuration sequence numbers of the multiple first QCL parameters are from small to large.
  • the terminal device 101 determines to use an advanced receiving algorithm to receive the PDSCH according to the TCI state configured in Table 2. Specifically, when the DCI indicates one of the TCI states configured in Table 2, that is, at least two QCL parameters of the same type are configured in the TCI state, the terminal device 101 needs to realize the synthesis of the QCL parameters according to its own algorithm, and adopt the synthesized QCL parameters receive DMRS and corresponding data channels.
  • the reception start time of the DMRS and the corresponding data channel and the reception of the DCI are terminated
  • the time interval between moments is t1; when there is only one QCL parameter of the same type configured in each TCI state indicated by DCI or all TCI states configured by RRC, the reception of DMRS and the corresponding data channel starts
  • the time interval between the time and the DCI reception termination time is t2.
  • t1 can be greater than t2.
  • the terminal device 101 may report to the network device 102 that the TCI state that it supports for configuration includes at least two QCL parameters of the same type.
  • the first information may be used to indicate multiple TCI status information, where one of the multiple TCI status information may be used to indicate one QCL parameter.
  • the multiple TCI status information may be used to indicate one QCL parameter.
  • any one of multiple TCI status information can be used to indicate one QCL parameter, or each of multiple TCI status information can be used to indicate one QCL parameter.
  • the multiple QCL parameters include multiple first QCL parameters
  • one of the multiple TCI status information may be used to indicate one first QCL parameter.
  • the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter, where each TCI state corresponds to one QCL parameter.
  • the second information may be indicated by signaling such as RRC, MAC CE, or DCI.
  • the correspondence between TCI status and QCL parameters is shown in Table 3.
  • the first information is specifically shown in the TCI indication field of Table 4, where the TCI state corresponding to the value of each TCI indication field can be pre-configured by the network device.
  • TCI indicator field Corresponding meaning 000 TCI state 1, TCI state 2 001 TCI state 1, TCI state 3 ... ... 111 TCI status 4
  • each TCI state in Table 3 can correspond to a QCL parameter.
  • the terminal device 101 determines multiple TCI status information according to the first information, such as the TCI indication field values 000 and 001 in Table 4, it can query Table 3 to determine the multiple QCL parameters indicated by the network device 102.
  • the TCI status indicated by the TCI status information included in the first information is TCI status 1 and TCI status 2.
  • the terminal device 101 can determine RS ID1 and TCI status under the first QCL parameter.
  • the first QCL parameter 3 is the QCL parameter of the DMRS port on the first resource.
  • the network device 102 may also send fourth information to the terminal device 101 to instruct the terminal device 101 to determine the status of the first resource according to the multiple TCI states after receiving multiple TCI states indicated by the first information.
  • the DMRS port adopts the multiple QCL parameters to prevent the terminal device 101 from associating multiple QCL parameters to different DMRS ports, or associating multiple QCL parameters to DMRS ports on different time-frequency domain resources.
  • the fourth information may be used to instruct the terminal device 101 to perform data transmission according to the method shown in FIG. 2.
  • the fourth information may be used to indicate that multiple TCI states or multiple QCL parameters correspond to the same DMRS port.
  • the fourth information may be carried in the same DCI as the first information, or the fourth information may be part of the first information.
  • the fourth information may be carried in signaling such as RRC, MAC CE, or DCI.
  • all DMRS ports scheduled by the DCI where the first information is located use multiple first QCL parameters on all scheduled time-frequency resources.
  • a QCL parameter when the first information indicates that a TCI state includes multiple first QCL parameters, all DMRS ports scheduled by the DCI where the first information is located use multiple first QCL parameters on all scheduled time-frequency resources.
  • the terminal device when the first information indicates multiple TCI states, the terminal device also needs to determine the DMRS receiving behavior according to the fourth information.
  • the fourth information is DMRS port indication information, which is used to indicate scheduling DMRS port number.
  • CDM code domain multiplexing
  • the DMRS port number indicated by the fourth information is in the same code domain multiplexing (CDM) group, all DMRS ports scheduled by the DCI where the first information is located use multiple time-frequency resources.
  • First QCL parameters when the DMRS port numbers indicated by the fourth information are in different code division multiplexing groups, DMRS ports in different CDM groups use different first QCL parameters.
  • the terminal device when the first information indicates multiple TCI states, the terminal device also needs to determine the DMRS receiving behavior according to the fourth information.
  • the fourth information includes DMRS port indication information, which is used to indicate the scheduled DMRS port number.
  • DMRS port indication information is used to indicate the scheduled DMRS port number.
  • All DMRS ports scheduled by the DCI where one information is located use multiple first QCL parameters on all scheduled time-frequency resources; when the DMRS port number indicated by the fourth information is in the same code division multiplexing group and the fourth information indicates the current The transmission adopts frequency domain multiplexing (FDM) mode.
  • FDM frequency domain multiplexing
  • All DMRS ports scheduled by DCI where the first information is located use different first QCL parameters on the first part of the time-frequency resource and the second part of the time-frequency resource.
  • the DMRS port numbers indicated by the fourth information are located in different code division multiplexing groups, the DMRS ports located in the different CDM groups adopt different first QCL parameters.
  • the reference signals corresponding to the multiple first QCL parameters are the same.
  • the terminal device can determine that the current PDSCH transmission adopts the SFN mode, and then adopts a specific channel estimation algorithm.
  • the reference signal corresponding to the first QCL parameter is used to detect the channel including multipath and multipath reception strength.
  • the terminal device estimates the equivalent frequency offset to receive the DMRS according to the detected multipath.
  • the terminal device receives the DMRS according to the frequency offset obtained by the detected stronger path .
  • an implicit indication can also be used to make the terminal device 101 determine that the multiple TCI states are associated with the same DMRS port. For example, when the second QCL parameters corresponding to multiple TCI states are associated with the same reference signal port, the terminal device 101 can determine that multiple TCI states are associated with the same DMRS port, and subsequently can determine multiple QCLs according to the multiple TCI states parameter.
  • the terminal device 101 may determine to use an advanced receiving algorithm to receive the PDSCH according to multiple TCI states corresponding to the same DMRS port on the same physical resource indicated in the DCI. Specifically, when the DCI indicates multiple TCI states and receives the fourth information, the terminal device 101 needs to realize the synthesis of QCL parameters according to its own algorithm, and use the synthesized QCL parameters to receive the DMRS and the corresponding data channel.
  • the time interval between the reception start time of the DMRS and the corresponding data channel and the DCI reception end time is t3; when the DCI indicates multiple TCI states And when any condition in the fourth message is not met (or when multiple TCI states are not indicated in the DCI and/or the terminal device 101 does not receive the fourth message), the DMRS and the corresponding data channel reception start time
  • the time interval between DCI and DCI reception termination time is t4.
  • t3 can be greater than t4.
  • the terminal device 101 reports to the network device 102 that it supports indicating multiple TCI states and indicating fourth information.
  • multiple downlink reference signals may be used to indicate (or represent, characterize) multiple QCL parameters.
  • the first information may include TCI state information, and the TCI state corresponding to the TCI state information may correspond to the multiple downlink reference signals.
  • TCI state 1 is used to indicate the quasi co-location relationship between the DMRS port and the reference signals RS1 and RS2, which can be understood as indicating multiple QCL parameters through the reference signals RS1 and RS2.
  • multiple downlink reference signals may come from one or more transmission reception points (TRP).
  • TRP transmission reception points
  • Case 1 The multiple QCL parameters are multiple first QCL parameters.
  • the first information may indicate one or more first downlink reference signals, where the one or more first downlink reference signals are associated with a plurality of first QCL parameters.
  • the one or more first downlink reference signals and the DMRS port on the first resource have the same first QCL parameters, or first QCL assumptions; in other words, the one or more first downlink reference signals and DMRS is QCL under the first QCL parameter.
  • the first downlink reference signal may be TRS or CSI-RS.
  • the TCI status indicated by the TCI status information included in the first information may correspond to the respective identifications of the multiple TRSs.
  • TCI state 1 may correspond to TRS1 and TRS2, where TRS1 corresponds to RS ID1 under the first QCL parameter, and TRS2 corresponds to RS ID2 under the first QCL parameter.
  • TRS1 corresponds to RS ID1 under the first QCL parameter
  • TRS2 corresponds to RS ID2 under the first QCL parameter.
  • the correspondence between the reference signal identifier and the QCL parameter is shown in Table 5 by way of example only. This application does not exclude that one reference signal identifier can correspond to multiple QCL parameters.
  • TRS1 may also correspond to the first QCL parameter. RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter.
  • the terminal device 101 can determine the RS ID1 under the first QCL parameter according to TRS1, and determine the RS under the first QCL parameter according to TRS2 ID2.
  • the TCI status indicated by each TCI status information may correspond to the identifiers of some TRSs in the multiple TRSs.
  • TCI state 1 may correspond to TRS1, where TRS1 corresponds to RS ID1 under the first QCL parameter.
  • TCI state 2 may correspond to TRS2, where TRS2 corresponds to RS ID2 under the first QCL parameter.
  • TRS1 may also correspond to the first QCL parameter. RS ID1 under the first QCL parameter and RS ID2 under the first QCL parameter.
  • TCI status Reference signal identification QCL parameters TCI status 1 TRS1
  • the first QCL parameter TCI status 2 TRS2
  • the first QCL parameter TCI status 3
  • Second QCL parameter TCI status 4
  • CSI-RS2 Second QCL parameter TCI status 5
  • CSI-RS3 Second QCL parameter
  • Second QCL parameter TCI status 5
  • CSI-RS3 Second QCL parameter
  • Second QCL parameter TCI status 5
  • Second QCL parameter TCI status 6
  • CSI-RS6 Second QCL parameter TCI status 7
  • the first QCL parameter ... ... ...
  • the terminal device 101 can determine the RS ID1 under the first QCL parameter according to the TRS1 corresponding to the TCI status 1, and Determine the RS ID2 under the first QCL parameter according to the TRS2 corresponding to the TCI state 2. Therefore, the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter can be indicated through TRS1 and TRS2.
  • multiple first QCL parameters may correspond to the same first downlink reference signal, and the terminal device 101 may determine a method for receiving the first downlink reference signal according to the configuration information. Specifically, the terminal device 101 needs to use an advanced receiving algorithm to identify multiple paths with higher signal strength in the first downlink reference signal, and respectively determine the frequency offset estimation value corresponding to each path.
  • the terminal device 101 also needs to determine, according to the configuration information, a method for receiving a DMRS that has a QCL association relationship with the first downlink reference signal. Specifically, each path in the DMRS is identified according to the estimated value of the frequency offset corresponding to each path, and subsequent channel filtering processing is performed.
  • the multiple QCL parameters include multiple first QCL parameters and one or more second QCL parameters.
  • the first information indicates one or more first downlink reference signals to indicate a plurality of first QCL parameters.
  • at least one of the one or more first downlink reference signals may also be used to indicate one or more second QCL parameters, where one or more first downlink reference signals At least one first downlink reference signal in the signal is associated with one or more QCL parameters.
  • at least one of the one or more first downlink reference signals has the same second QCL parameter as the DMRS, or at least one of the one or more first downlink reference signals has the same second QCL parameter.
  • a downlink reference signal and DMRS are QCL under the second QCL parameter.
  • TCI state 2 can correspond to TRS3, TRS4, and TRS5 respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter, TRS4 corresponds to RS ID4 under the first QCL parameter, and TRS5 corresponds to the first QCL parameter.
  • RS ID5 under QCL parameters. If the TCI status 2 is indicated by a TCI status message in the first information, the terminal device 101 can determine the RS ID3 under the first QCL parameter according to TRS3, determine the RS ID4 under the first QCL parameter according to TRS4, and determine according to TRS3 RS ID1 under the second QCL parameter.
  • TRS1 and TRS2 can be used to indicate the first QCL parameter of DMRS port 0, and TRS1 can be used to indicate the second QCL parameter of DMRS port 0.
  • UE101 may receive the PDSCH scheduled by the first information based on the receiving beam of TRS1.
  • TRS1 and TRS2 come from transmission point 1 and transmission point 2, respectively.
  • the plurality of first downlink reference signals of the plurality of first downlink reference signals indicated by the first information may have the same second QCL parameter as the DMRS, and thus may be indicated by the second downlink reference signal The second QCL parameter.
  • TCI state 3 may correspond to TRS3 and TRS4 respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter, and TRS4 corresponds to RS ID4 under the first QCL parameter.
  • TRS3 also corresponds to RS ID2 under the second QCL parameter
  • TRS4 also corresponds to RS ID3 under the second QCL parameter.
  • the terminal device 101 can determine the RS ID3 under the first QCL parameter and the RS ID2 under the second QCL parameter according to TRS3, and determine the RS ID2 under the first QCL parameter according to TRS4.
  • RS ID4 and RS ID3 under the second QCL parameter can be determined.
  • the UE may receive the PDSCH scheduled by the first information based on the receiving beams of TRS1 and TRS2.
  • the receiving beams of TRS1 and TRS2 are different, so the UE needs to use different antenna panels (or antenna groups) to receive.
  • an antenna panel can be understood as a transmission link including radio frequency units, antenna ports, power amplifiers, and filters.
  • data and DMRS use two receiving beams of TRS1 and TRS2 respectively (corresponding to two antenna panels)
  • the channel parameters can be further determined based on the respective TRS, such as Doppler frequency offset or Doppler delay spread, independent channel estimation, and then the soft information of the data is obtained separately and combined to increase robustness.
  • one or more second downlink reference signals may also be used to indicate second QCL parameters, where one or more Two downlink reference signals are associated with one or more second QCL parameters.
  • the one or more second downlink reference signals and the DMRS have the same second QCL parameter, or the one or more second downlink reference signals and the DMRS are QCL under the second QCL parameter.
  • the first information may also indicate a second downlink reference signal, where the second downlink reference signal and the DMRS have the same second QCL parameter.
  • the configuration of the first downlink reference signal refer to the description in Case 1.
  • the type of the second downlink reference signal is different from that of the first downlink reference signal.
  • the second downlink reference signal is CSI-RS (or other types of RS except TRS and CSI-RS); if the first downlink reference signal is CSI-RS, then The second downlink reference signal is TRS (or other types of RS except TRS and CSI-RS).
  • the first downlink reference signal may include TRS1 corresponding to TCI state 1 and/or TRS2 corresponding to TCI state 2. Accordingly, the multiple QCL parameters indicated by TRS1 and TRS2 may include those under the first QCL parameter. RS ID1 and RS ID2 under the first QCL parameter.
  • the second downlink reference signal may include CSI-RS1 corresponding to TCI state 3 and/or CSI-RS2 corresponding to TCI state 3. Accordingly, the QCL parameters indicated by CSI-RS1 and CSI-RS2 may include RS under the second QCL parameter ID1 and/or RS ID2 under the second QCL parameter.
  • the UE may receive the PDSCH scheduled by the first information based on the receiving beam of the CSI-RS1. In this example, before scheduling the PDSCH, the terminal device 101 will not only receive multiple TRSs, but also multiple CSI-RSs.
  • the role of CSI-RS is to train the transceiver beams, that is, the reception of different CSI-RSs. Different beams are used for transmission, and the terminal device 101 can allow the network device 102 to determine the optimal receiving/transmitting beam for data transmission by reporting measurement information.
  • the first information may also indicate a plurality of second downlink reference signals, and the plurality of second downlink reference signals have the same second QCL parameter as the DMRS.
  • the second downlink reference signal may include CSI-RS3 and CSI-RS4 corresponding to TCI state 5.
  • the QCL parameters indicated by CSI-RS3 and CSI-RS4 may include RS under the second QCL parameter. ID3.
  • the second downlink reference signal may include CSI-RS5 and CSI-RS6 corresponding to TCI state 6.
  • the QCL parameters indicated by CSI-RS5 and CSI-RS6 may include RS under the second QCL parameter. ID4 and RS ID5 under the second QCL parameter.
  • TRS1 and TRS2 can be used to indicate the first QCL parameter of DMRS port 0 in this application.
  • the network device 102 may send CSI-RS1 and CSI-RS2 to the terminal device 101 before sending the first information for beam training.
  • the second QCL parameter of DMRS port 0 can be indicated through CSI-RS1 and CSI-RS2, and the terminal device can receive the PDSCH scheduled by the first information based on the receiving beams of CSI-RS1 and CSI-RS2.
  • the UE can perform channel estimation based on the channel received by CSI-RS1, combined with the channel parameters obtained by TRS1, and at the same time, based on the channel received by CSI-RS2, combined with the channel parameters obtained by TRS2, and then obtain the soft information of the data respectively. Combine, increase the robustness of data reception.
  • the types of the first downlink reference signal and the second downlink reference signal may also be the same, for example, both are CSI-RS.
  • at least one type system of the first downlink reference signal and the second downlink reference signal for example, the first downlink reference signal is one TRS and one CSI-RS, and the second downlink reference signal is CSI-RS.
  • the first downlink reference signal may include TRS1 corresponding to TCI state 1 and CSI-RS7 corresponding to TCI state 7
  • the second downlink reference signal may include CSI-RS1 corresponding to TCI state 3 and TCI state 4 corresponding
  • the terminal device 101 may determine that the QCL parameters may include RS ID1 under the first QCL parameter, RS ID3 under the first QCL parameter, RS ID1 under the second QCL parameter, and RS ID2 under the second QCL parameter.
  • the first QCL parameter of DMRS port 0 can be indicated by TRS2 and CSI-RS2, and the second QCL parameter of DMRS port 0 can be indicated by CSI-RS1.
  • the UE may receive the PDSCH scheduled by the first information based on the receiving beam of the CSI-RS1.
  • the network device may also send CSI-RS2 for further channel parameter estimation, and send CSI-RS1 for beam training.
  • the UE shown in Figures 3 to 7 above may be deployed or located on a high-speed moving vehicle, such as a vehicle, a train, a ship, or a plane.
  • a high-speed moving vehicle such as a vehicle, a train, a ship, or a plane.
  • Another communication method provided by an embodiment of the present application may include the process shown in FIG. 8:
  • the network device determines the first information. In other words, the network device obtains the first information.
  • the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • each group of DMRS ports in the multiple groups of DMRS ports corresponds to one of multiple QCL parameters
  • each group of DMRS ports in the multiple groups of DMRS ports includes at least one DMRS port.
  • different groups of DMRS ports correspond to a different QCL parameter
  • the same group of DMRS ports correspond to the same QCL parameter
  • the number of DMRS groups is the same as the number of QCL parameters.
  • Each group of DMRS ports may include one or more DMRS ports.
  • each group of DMRS ports in the multiple groups of DMRS ports includes the same number of DMRS ports.
  • the number of DMRS ports included in each group of DMRS ports is the number of transmission layers of the PDSCH. For example, if each group of DMRS ports includes 2 DMRS ports, the number of transmission layers of the corresponding PDSCH is 2.
  • one DMRS port in each group of DMRS ports in the multiple groups of DMRS ports jointly corresponds to the same PDSCH port.
  • DMRS port group 0 includes DMRS port 0 and DMRS port 1
  • DMRS port group 1 includes DMRS port 2 and DMRS port 3.
  • DMRS port 0 and DMRS port 2 correspond to the same PDSCH port
  • DMRS port 1 and DMRS Port 3 corresponds to the same PDSCH port.
  • one DMRS port in each group of DMRS ports in the multiple groups of DMRS ports corresponds to the PDSCH port with the port number from small to large according to the port number from small to large.
  • multiple DMRS ports in a group of DMRS ports belong to the same CDM group, and DMRS ports in different groups of DMRS ports belong to different CDM groups.
  • the number of DMRS port groups is 2 or 3.
  • the number of DMRS ports in the DMRS port group is 1 or 2 or 3 or 4.
  • S202 The network device sends the first information to the terminal device.
  • the terminal device receives the first information.
  • S203 The network device sends a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the terminal device determines multiple sets of DMRS ports according to the first information, and receives the PDSCH according to the multiple sets of DMRS ports. Specifically, the channel estimation result of each PDSCH port will be jointly determined according to one DMRS port in each group of DMRS ports in the multiple groups of DMRS ports.
  • the network device can configure multiple QCL parameters associated with multiple groups of DMRS ports to the terminal device, and multiple DMRS ports in each group of DMRS are commonly used for channel estimation of one PDSCH port. Therefore, the terminal equipment can obtain the channel estimation results of multiple DMRS ports according to multiple DMRS ports for one PDSCH port, and perform operations such as combining and averaging the multiple channel estimation results for the data layer reception of the PDSCH port to improve Channel estimation performance.
  • the QCL parameter may include a first QCL parameter, such as a first QCL parameter, or include a first QCL parameter and a second QCL parameter, such as a first QCL parameter and a second QCL parameter.
  • the first QCL parameter and the second QCL parameter can refer to the foregoing description.
  • the QCL parameters in the same group of DMRS ports are the same, that is, each DMRS port corresponds to the same first QCL parameter or the same first and second QCL parameters; QCL parameters in different groups of DMRS ports are different, that is, different The DMRS ports in the group correspond to different first QCL parameters or different first QCL parameters and second QCL parameters.
  • the first information may include one piece of TCI state information, and the TCI state information may be used to indicate the multiple QCL parameters, for example, to indicate multiple first QCL parameters.
  • the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the TCI state may include one or more TCI states
  • the QCL parameter may include one or more QCL parameters
  • the correspondence between the TCI state and the QCL parameter may be any one and one or more of the one or more TCI states
  • One or more of the QCL parameters correspond.
  • One TCI state information in the first information may be used to indicate one TCI state among the one or more TCI states indicated in the second information.
  • the second information may be indicated by signaling such as RRC, MAC CE, or DCI.
  • the corresponding relationship can be shown in Table 7.
  • Each TCI state can correspond to multiple QCL parameters.
  • the terminal device 101 After the terminal device 101 determines the TCI status information according to the first information, it can query Table 7 to determine the multiple QCL parameters of the multiple DMRS ports indicated by the network device 102. For example, when there are two groups of DMRS ports, and each group of DMRS ports only includes one DMRS port, if the network device indicates TCI status 3, the first group of DMRS ports in the two groups of DMRS ports is related to the first QCL parameter of RS5 And is associated with the second QCL parameter of RS7, the second group of DMRS ports in the two groups of DMRS ports is associated with the first QCL parameter of RS6, and is associated with the second QCL parameter of RS8.
  • One PDSCH port corresponds to the first group of DMRS ports and the second group of DMRS ports. It should be understood that the first QCL parameter and the second QCL parameter correspond to different QCL types. In the following table, the first QCL parameters corresponding to different RS IDs respectively represent the RS IDs under the first QCL parameters.
  • the network device 102 may also send third information to the terminal device 101.
  • the third information may be used to indicate the corresponding relationship between the plurality of first QCL parameters and the plurality of second QCL parameters, so that the terminal device 101 associates the first QCL with the second QCL parameter, so as to perform processing according to the associated QCL parameter Channel estimation.
  • the corresponding relationship between the multiple first QCL parameters and the multiple second QCL parameters can be predefined.
  • the corresponding relationship is determined according to the order of parameter configuration, and the configuration sequence numbers of the multiple first QCL parameters are from small to large.
  • the network device also needs to configure RS ID4 under the first QCL parameter and RS ID2 under the second QCL parameter to have an association relationship, RS ID5 under the first QCL parameter and second QCL parameter If the RS ID3 has an association relationship, based on the third information, the terminal device can use the receiving beam corresponding to the RS ID2 under the second QCL parameter to receive the DMRS signal 1, and according to the associated RS ID4 and the RS ID4 under the first QCL parameter The DMRS signal 1 determines the channel estimation result 1.
  • the terminal device may use the receiving beam corresponding to the RS ID3 under the second QCL parameter to receive the DMRS signal 2 and determine the channel estimation result 2 according to the RS ID5 and the DMRS signal 2 under the associated first QCL parameter. After that, the terminal device can receive the PDSCH according to the channel estimation result 1 and the channel estimation result 2.
  • the above third information can be carried in signaling such as RRC, MAC CE, or DCI.
  • the third information and the first information are carried in the same DCI.
  • the first information may be used to indicate multiple TCI status information, where one of the multiple TCI status information may be used to indicate one QCL parameter.
  • the multiple TCI status information may be used to indicate one QCL parameter.
  • any one of multiple TCI status information can be used to indicate one QCL parameter, or each of multiple TCI status information can be used to indicate one QCL parameter
  • one of the multiple TCI status information may be used to indicate one first QCL parameter.
  • the network device 102 may send the second information to the terminal device 101 to indicate the corresponding relationship between the TCI state and the QCL parameter, where each TCI state corresponds to one QCL parameter.
  • the second information may be indicated by signaling such as RRC, MAC CE, or DCI.
  • the correspondence between TCI status and QCL parameters is shown in Table 3.
  • the first information is specifically shown in the TCI indication field of Table 4, where the TCI state corresponding to the value of each TCI indication field can be pre-configured by the network device.
  • multiple downlink reference signals may be used to indicate multiple QCL parameters, where multiple downlink reference signals are associated with the multiple QCL parameters.
  • the first information may include TCI state information, and the TCI state corresponding to the TCI state information may correspond to the multiple downlink reference signals.
  • TCI state 1 is used to indicate the quasi co-location relationship between the DMRS port and the reference signals RS1 and RS2, which can be understood as indicating multiple QCL parameters through the reference signals RS1 and RS2.
  • Case 1 The multiple QCL parameters are multiple first QCL parameters.
  • the first information may be used to indicate multiple first downlink reference signals, where the multiple first downlink reference signals are associated with multiple first QCL parameters.
  • the plurality of first downlink reference signals and the plurality of DMRS have the same first QCL parameter; in other words, the plurality of first downlink reference signals and DMRS are QCL under the first QCL parameter.
  • the first downlink reference signal may be TRS or CSI-RS.
  • the TCI status indicated by the TCI status information included in the first information may correspond to the respective identifications of the multiple TRSs. For example, as shown in Table 5, if the TCI status 1 is indicated in the first information, the terminal device 101 can determine the RS ID1 under the first QCL parameter according to TRS1, and determine the RS under the first QCL parameter according to TRS2 ID2.
  • the TCI status indicated by each TCI status information can correspond to the identifiers of some TRSs in the multiple TRSs.
  • TCI state 1 may correspond to TRS1, where TRS1 corresponds to RS ID1 under the first QCL parameter.
  • TCI state 2 may correspond to TRS2, where TRS2 corresponds to RS ID2 under the first QCL parameter. Therefore, the RS ID1 under the first QCL parameter and the RS ID2 under the first QCL parameter can be indicated through TRS1 and TRS2.
  • the multiple QCL parameters include multiple first QCL parameters and one or more second QCL parameters.
  • the first information indicates multiple first downlink reference signals to indicate multiple first QCL parameters.
  • one or more second QCL parameters may also be indicated by one of the first downlink reference signals among the plurality of first downlink reference signals, where one of the plurality of first downlink reference signals is the first A downlink reference signal is associated with one or more second QCL parameters.
  • the first downlink reference signal among the plurality of first downlink reference signals and the DMRS have the same second QCL parameter, or at least one first downlink reference signal among the plurality of first downlink reference signals , And DMRS is QCL under the second QCL parameter.
  • TCI state 2 can correspond to TRS3, TRS4, and TRS5 respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter, TRS4 corresponds to RS ID4 under the first QCL parameter, and TRS5 corresponds to the first QCL parameter.
  • RS ID5 under QCL parameters. If the TCI status 2 is indicated by a TCI status message in the first information, the terminal device 101 can determine the RS ID3 under the first QCL parameter according to TRS3, determine the RS ID4 under the first QCL parameter according to TRS4, and determine according to TRS3 RS ID1 under the second QCL parameter.
  • the multiple first downlink reference signals of the multiple first downlink reference signals indicated by the first information may also have the same second QCL parameters as the DMRS, so that the second downlink reference signal can be passed through Indicates the second QCL parameter.
  • TCI state 3 may correspond to TRS3 and TRS4 respectively, where TRS3 corresponds to RS ID3 under the first QCL parameter, and TRS4 corresponds to RS ID4 under the first QCL parameter.
  • TRS3 also corresponds to RS ID2 under the second QCL parameter
  • TRS4 also corresponds to RS ID3 under the second QCL parameter.
  • multiple first QCL parameters and multiple second QCL parameters can be indicated through TRS3 and TRS4.
  • one or more second downlink reference signals may also be used to indicate second QCL parameters, where one or more first downlink reference signals are used to indicate the second QCL parameters.
  • the second downlink reference signal is associated with the second QCL parameter.
  • the one or more second downlink reference signals and the DMRS have the same second QCL parameter, or in other words, the one or more second downlink reference signals and the DMRS have the QCL under the second QCL parameter.
  • the first information may also indicate a second downlink reference signal, where the second downlink reference signal and the DMRS have the same second QCL parameter.
  • the type of the second downlink reference signal is different from that of the first downlink reference signal.
  • the second downlink reference signal is CSI-RS (or other types of RS except TRS and CSI-RS); if the first downlink reference signal is CSI-RS, then The second downlink reference signal is TRS (or other types of RS except TRS and CSI-RS).
  • the first downlink reference signal may include TRS1 corresponding to TCI state 1 and/or TRS2 corresponding to TCI state 2. Accordingly, the multiple QCL parameters indicated by TRS1 and TRS2 may include those under the first QCL parameter. RS ID1 and RS ID2 under the first QCL parameter.
  • the second downlink reference signal may include CSI-RS1 corresponding to TCI state 3 and/or CSI-RS2 corresponding to TCI state 3. Accordingly, the QCL parameters indicated by CSI-RS1 and CSI-RS2 may include RS under the second QCL parameter ID1 and/or RS ID2 under the second QCL parameter.
  • an embodiment of the present application also provides a communication device, which may have the functions or steps or operations of the network device or terminal device in the above method embodiment.
  • a communication device may be provided with functional modules corresponding to the functions or steps or operations in the above-mentioned methods to support the communication device to execute the above-mentioned methods.
  • This function can be realized by hardware, or by software or hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device may be a chip or a communication chip with a communication module, or may be implemented by a chip or a communication chip with a communication module.
  • the communication device 900 shown in FIG. 9 can be used as the network device involved in the foregoing method embodiment, and executes the steps performed by the network device in the foregoing method embodiment.
  • the communication device 900 may include a communication module 901 and a processing module 902, and the communication module 901 and the processing module 902 are coupled to each other.
  • the communication module 901 can be used to support the communication device 900 to communicate, and the communication module 901 can have a wireless communication function, for example, can perform wireless communication with other communication devices through a wireless air interface.
  • the processing module 902 can be used to support the communication device 900 to perform the processing actions in the foregoing method embodiments.
  • the processing actions here include, but are not limited to: generating information and messages sent by the communication module 901, and/or receiving information from the communication module 901.
  • the signal is demodulated and decoded and so on.
  • the above communication module 901 may be specifically used to perform the sending and/or receiving actions of the network device in the communication method shown in FIG. 2 or FIG. 8.
  • the communication module 901 may be used to perform an action of sending information, messages, or signaling from a network device to a terminal device, or to perform an action of receiving information, messages, or signaling from a terminal device.
  • processing module 902 can be specifically used to perform processing actions of the network device in the communication method shown in FIG. 2 or FIG. Processing and other operations.
  • the processing module 902 may be used to determine (or obtain) the first information.
  • the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the communication module 901 may be used to send the first information to the terminal device.
  • the communication module 901 can also be used to send DMRS through the DMRS port.
  • the above first information refer to the description of the first information involved in the method shown in FIG. 2 in the method embodiment.
  • the communication module 901 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information involved in the method shown in FIG. 2 in the method embodiment.
  • the communication module 901 may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information involved in the method shown in FIG. 2 in the method embodiment.
  • the processing module 902 may be used to determine (or obtain) the first information.
  • the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the communication module 901 may be used to send the first information to the terminal device.
  • the communication module 901 can also be used to send a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the communication module 901 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication module 901 may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver, to implement the functions of the network device in the present application.
  • FIG. 10 takes a base station as an example to illustrate the structure of the communication device.
  • the communication device 1000 may include a transceiver 1001, a memory 1002, and a processor 1003 to implement the functions of the network device provided in the embodiment of the present application.
  • the transceiver 1001 can be used for communication with a communication device.
  • the memory 1002 is coupled with the processor 1003 and can be used to store programs and data necessary for the communication device 1000 to implement various functions.
  • the processor 1003 is configured to support the communication device 1000 to execute the corresponding function of the network device in the foregoing method, and the function can be implemented by calling a program stored in the memory 1002.
  • the transceiver 1001 may be a wireless transceiver, which may be used to support the communication device 1000 to receive and send signaling and/or data through a wireless air interface.
  • the transceiver 1001 may also be referred to as a transceiver unit or a communication unit.
  • the transceiver 1001 may include a radio frequency unit and one or more antennas.
  • the radio frequency unit such as a remote radio unit (RRU), can be specifically used for radio frequency signals.
  • the one or more antennas can specifically be used to radiate and receive radio frequency signals.
  • the transceiver 1001 may only include the above radio frequency units.
  • the communication device 1000 may include a transceiver 1001, a memory 1002, a processor 1003, and an antenna.
  • the memory 1002 and the processor 1003 may be integrated or independent of each other. As shown in FIG. 10, the memory 1002 and the processor 1003 can be integrated into the control unit 1010 of the communication device 1000.
  • the control unit 1010 may include a baseband unit (BBU) of an LTE base station, and the baseband unit may also be called a digital unit (DU), or the control unit 1010 may include 5G and future wireless access Under technology, a distributed unit (DU) and/or a centralized unit (CU) in a base station.
  • the above-mentioned control unit 1010 may be composed of one or more single boards, wherein multiple single boards can jointly support a wireless access network (such as an LTE network) of a single access standard, and multiple single boards can also support different access standards.
  • a wireless access network such as an LTE network
  • the memory 1002 and the processor 1003 may serve one or more single boards. In other words, the memory 1002 and the processor 1003 can be separately provided on each board. It may also be that multiple boards share the same memory 1002 and processor 1003. In addition, a necessary circuit may be provided on each board, for example, the circuit may be used to realize the coupling between the memory 1002 and the processor 1003.
  • the above transceiver 1001, the processor 1003, and the memory 1002 may be connected through a bus structure and/or other connection media.
  • the processor 1003 can baseband process the data to be sent and output the baseband signal to the radio frequency unit.
  • the radio frequency unit performs radio frequency processing on the baseband signal and passes the radio frequency signal through the antenna. Send in the form of electromagnetic waves.
  • the radio frequency unit 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 1003, and the processor 1003 converts the baseband signal into data and applies the data to the baseband signal. To process.
  • the above transceiver 1001 may be specifically used to perform the sending and/or receiving actions of the network device in the communication method shown in FIG. 2 or FIG. 8.
  • the transceiver 1001 may be used to perform an action of sending information, a message, or signaling from a network device to a terminal device, or may be used to perform an action of receiving information, a message, or signaling from a terminal device.
  • processor 1003 can be specifically used to perform processing actions of the network device in the communication method shown in FIG. 2 or FIG. Processing and other operations.
  • the processor 1003 may be used to determine (or obtain) the first information.
  • the first information is used to indicate multiple QCL parameters of the DMRS port on the first resource.
  • the transceiver 1001 can be used to send the first information to the terminal device.
  • the transceiver 1001 can also be used to transmit DMRS through the DMRS port.
  • the above first information refer to the description of the first information involved in the method shown in FIG. 2 in the method embodiment.
  • the transceiver 1001 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information involved in the method shown in FIG. 2 in the method embodiment.
  • the transceiver 1001 may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information involved in the method shown in FIG. 2 in the method embodiment.
  • the processor 1003 may be used to determine (or obtain) the first information.
  • the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the transceiver 1001 can be used to send the first information to the terminal device.
  • the transceiver 1001 may also be used to transmit a PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • the transceiver 1001 may also be used to send second information to the terminal device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information refer to the description of the second information involved in the method shown in FIG. 8 in the method embodiment.
  • the transceiver 1001 may also be used to send third information to the terminal device.
  • the third information refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication device 1100 shown in FIG. 11 can be used as the terminal device involved in the foregoing method embodiment, and executes the steps performed by the terminal device in the foregoing method embodiment.
  • the communication device 1100 may include a communication module 1101 and a processing module 1102, and the communication module 1101 and the processing module 1102 are coupled to each other.
  • the communication module 1101 can be used to support the communication device 1100 to communicate.
  • the communication module 1101 can have a wireless communication function, for example, can communicate with other communication devices through a wireless air interface.
  • the processing module 1102 can be used to support the communication device 1100 to perform the processing actions in the foregoing method embodiments.
  • the processing actions here include, but are not limited to: generating information and messages sent by the communication module 1101, and/or information received by the communication module 1101
  • the signal is demodulated and decoded and so on.
  • the above communication module 1101 may be specifically used to perform the sending and/or receiving actions of the terminal device in the communication method shown in FIG. 2 or FIG. 8.
  • the communication module 1101 may be used to perform an action of receiving information, messages, or signaling from a network device by a terminal device, or to perform an action of sending information, messages, or signaling to a network device.
  • processing module 1102 can be specifically used to perform processing actions of the terminal device in the communication method shown in FIG. 2 or FIG. Processing and other operations.
  • the communication module 1101 may be used to receive first information from the network device, and the first information is used to indicate the multiple QCLs of the DMRS port on the first resource parameter.
  • the communication module 1101 can also be used to receive DMRS through the DMRS port.
  • first information refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication module 1101 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the communication module 1101 may also be used to receive third information from the network device.
  • third information refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication module 1101 may be used to receive the first information from the network device.
  • the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the communication module 1101 may also be used to receive the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • first information refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication module 1101 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the communication module 1101 may also be used to receive third information from the network device.
  • third information refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver.
  • a mobile phone is taken as an example to illustrate the possible structure of the terminal device.
  • the communication device 1200 may include a processor 1201, a memory 1202, and a transceiver 1203.
  • the above processor 1201 can be used to process communication protocols and communication data, control terminal devices, execute software programs, and process data of software programs, and so on.
  • the memory 1202 may be used to store programs and data, and the processor 1201 may execute the method executed by the terminal device in the embodiments of the present application based on the program.
  • the transceiver 1203 may include a radio frequency unit and an antenna.
  • the radio frequency unit can be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the antenna can be used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the radio frequency unit may only be regarded as the transceiver 1203, then the communication device 1200 may include a processor 1201, a memory 1202, a transceiver 1203, and an antenna at this time.
  • the communication device 1200 may further include an input and output device 1204, such as a touch screen, a display screen, or a keyboard, etc., which can be used to receive data input by the user and output data to the user. It should be noted that some types of communication devices may not have input and output devices.
  • the processor 1201 can baseband processing the data to be sent, and output the baseband signal to the radio frequency unit.
  • the radio frequency unit performs radio frequency processing on the baseband signal and passes the radio frequency signal through the antenna. Send in the form of electromagnetic waves.
  • the radio frequency unit 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 1201, and the processor 1201 converts the baseband signal into data and applies the data to the baseband signal. To process.
  • the above transceiver 1203 may be specifically used to perform the sending and/or receiving actions of the terminal device in the communication method shown in FIG. 2 or FIG. 8.
  • the transceiver 1203 may be used to perform an action of receiving information, messages, or signaling from a network device by a terminal device, or to perform an action of sending information, messages, or signaling to a network device.
  • processor 1201 may be specifically used to perform processing actions of the terminal device in the communication method shown in FIG. 2 or FIG. 8, such as controlling the transceiver 1203 to receive and send information, messages, or signaling, and execute information Processing and other operations.
  • the transceiver 1203 may be used to receive first information from the network device, and the first information is used to indicate the multiple QCLs of the DMRS port on the first resource parameter.
  • the transceiver 1203 can also be used to receive DMRS through the DMRS port.
  • first information refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.
  • the transceiver 1203 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the transceiver 1203 may also be used to receive third information from the network device.
  • third information refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.
  • the transceiver 1203 may be used to receive the first information from the network device.
  • the first information is used to indicate multiple QCL parameters of multiple groups of DMRS ports.
  • the transceiver 1203 can also be used to receive the PDSCH, and each port of the PDSCH corresponds to one DMRS port in each group of DMRS ports.
  • first information refer to the description of the first information involved in the method shown in FIG. 8 in the method embodiment.
  • the transceiver 1203 may also be used to receive second information from the network device, and the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the second information may be used to indicate the corresponding relationship between the TCI state and the QCL parameter.
  • the transceiver 1203 may also be used to receive third information from the network device.
  • third information refer to the description of the third information involved in the method shown in FIG. 8 in the method embodiment.
  • the communication device may include a processor, and the processor may call an external transceiver and/or memory to implement the above-mentioned functions or steps or operations.
  • the communication device may also include a memory, and the processor can call and execute a program stored in the memory to implement the above-mentioned functions or steps or operations.
  • the communication device may also include a processor, that is, a transceiver, and the processor calls and executes a program stored in an external memory to implement the above-mentioned functions or steps or operations.
  • the communication device may also include a processor, a memory, and a transceiver.
  • the embodiment of the present application also provides a computer-readable storage medium on which program instructions (or computer programs, instructions) are stored.
  • program instructions or computer programs, instructions
  • the The computer executes the operations performed by the network device and/or the terminal device in any one of the foregoing method embodiments and any possible implementation of the method embodiments.
  • this application also provides a computer program product, including program instructions, which when called by a computer for execution, can make the computer implement any of the above method embodiments and method embodiments The operations performed by the network device and/or the terminal device in a possible implementation manner.
  • this application also provides a chip or chip system, which is coupled with a transceiver, and is used to implement the above method embodiment and any one of the possible implementation manners of the method embodiment. And/or the operation performed by the terminal device.
  • the chip system may include the chip and components such as memory and communication interface.
  • this application also provides a communication system that can be used to implement the above method embodiment and any one of the possible implementations of the method embodiment is executed by a network device and/or a terminal device. Operation.
  • the communication system has a structure as shown in FIG. 1.
  • the network device 101 and the terminal device 102 may be used to implement the communication method shown in FIG. 2 or FIG. 8.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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

Abstract

Sont décrits ici un procédé et un appareil de communication permettant d'améliorer la performance de transmission de données. Selon la présente invention, un dispositif de réseau peut configurer pour un dispositif terminal, une pluralité de paramètres QCL d'un port DMRS associé à une première ressource. Par conséquent, sur la première ressource, le dispositif terminal peut obtenir un paramètre QCL équivalent selon la pluralité des paramètres QCL ; le paramètre QCL équivalent peut représenter avec précision l'état d'un canal, et par conséquent, une estimation de canal est mise en oeuvre sur le port DMRS selon le paramètre QCL équivalent, et des données sont reçues selon la structure de l'estimation de canal, ce qui améliore la robustesse de la réception de données sur la première ressource.
PCT/CN2020/076264 2020-02-21 2020-02-21 Procédé et appareil de communication WO2021164023A1 (fr)

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