WO2021227928A1 - Procédé de transmission répétée de données - Google Patents

Procédé de transmission répétée de données Download PDF

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Publication number
WO2021227928A1
WO2021227928A1 PCT/CN2021/091948 CN2021091948W WO2021227928A1 WO 2021227928 A1 WO2021227928 A1 WO 2021227928A1 CN 2021091948 W CN2021091948 W CN 2021091948W WO 2021227928 A1 WO2021227928 A1 WO 2021227928A1
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WO
WIPO (PCT)
Prior art keywords
frequency domain
pdsch
tci
domain resource
indicate
Prior art date
Application number
PCT/CN2021/091948
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English (en)
Chinese (zh)
Inventor
张云昊
徐修强
骆喆
Original Assignee
华为技术有限公司
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Publication date
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Publication of WO2021227928A1 publication Critical patent/WO2021227928A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to communication technology, and in particular to a method for repeated transmission of data.
  • network devices and terminal devices can perform data transmission based on business scenarios.
  • this business scenario includes but is not limited to at least one of the following: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and large-scale machine types Communications (massive machine-type communications, mMTC).
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low-latency communication
  • mMTC massive machine-type communications
  • the network device and the terminal device can perform uplink data transmission, for example, the terminal device can send uplink data to the network device; and/or, the network device and the terminal device can perform downlink data transmission, for example, the network device can send downlink data to the terminal device.
  • the embodiment of the present application provides a method for repeated transmission of data, which aims to reduce the processing complexity of the terminal device during multi-beam transmission, thereby reducing the power consumption of the terminal device.
  • a method for repeated transmission of data including: receiving N repeated data from a network device, wherein the i-th repeated data in the N repeated data is set by using the i-th antenna port set. On each resource, it is carried by the i-th physical downlink shared channel PDSCH.
  • the value of i is 1 to N, that is, the value of i traverses from 1 to N, and N is an integer greater than or equal to 2, and the i-th resource includes the i-th frequency domain resource.
  • the i-th antenna port set includes one or more antenna ports.
  • the one or more antenna ports are the same as one or more antenna ports of the demodulation reference signal DMRS of the i-th PDSCH.
  • the N pieces of repeated data include N identical transport blocks TB.
  • frequency domain resources are independently configured for each beam.
  • the frequency diversity gain can be used without configuring a larger bandwidth for each beam, so the terminal side can be reduced.
  • Receive processing pressure which can reduce power consumption and cost on the terminal side.
  • the i-th frequency domain resource is predefined. Through this method, the signaling overhead for configuring the i-th frequency domain resource can be saved.
  • the method includes: receiving first indication information from the network device, which is used to indicate the i-th frequency domain resource.
  • the type of the first indication information is DCI
  • the frequency domain resource allocation field in the first indication information is used to indicate the i-th frequency domain resource.
  • the i-th frequency domain resource can be configured according to parameters such as channel conditions, so that the reception quality of the signal transmitted on the resource can be higher.
  • the antenna ports included in the i-th antenna port set are predefined. Through this method, the signaling overhead for configuring the i-th antenna port set can be saved.
  • the method includes: receiving first indication information from the network device, which is used to indicate the antenna ports included in the i-th antenna port set.
  • the i-th antenna port set includes the antenna port of the i-th PDSCH or the antenna port of the DMRS of the i-th PDSCH.
  • the type of the first indication information is DCI.
  • the antenna port set can be configured according to parameters such as channel conditions and/or required received energy, so that the reception quality of the signal transmitted on the antenna port set can be higher.
  • the i-th resource includes the i-th time domain resource, and the i-th time domain resource is predefined. Through this method, the signaling overhead for configuring the i-th time domain resource can be saved.
  • the i-th resource includes an i-th time domain resource
  • the method includes: receiving first indication information from the network device for indicating the i-th time domain resource.
  • the type of the first indication information is DCI
  • the time domain resource allocation field in the first indication information is used to indicate the i-th time domain resource.
  • the specific positions of any two time domain resources from the first time domain resource to the Nth time domain resource may be the same or different, which is not limited in the embodiment of the present application.
  • the method further includes: receiving second indication information from the network device, where the second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH.
  • the QCL information may be regarded as QCL information of the i-th antenna port set, and the one or more antenna ports in the i-th antenna port set are one or more of the DMRS of the i-th PDSCH Multiple antenna ports.
  • the QCL information may be regarded as the QCL information corresponding to the i-th frequency domain resource.
  • each antenna port set can be more accurately obtained.
  • PDSCH channel estimation can improve the correct rate of demodulation and decoding of PDSCH at the receiving end.
  • the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate that the DMRS of the i-th PDSCH is at least one signal of the QCL , And the DMRS of the i-th PDSCH and the QCL type of each signal in the at least one signal.
  • the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate the M2 set of QCL information, and the information of the DMRS of the i-th PDSCH
  • the QCL information includes the M2 set of QCL information, and the M2 set of QCL information is included in the M1 set of candidate QCL information.
  • M1 is an integer greater than or equal to 1
  • M2 is an integer greater than or equal to 1 and less than or equal to M1.
  • Any set of information in the M1 set of candidate QCL information is used to indicate a signal and a QCL type
  • the DMRS of the i-th PDSCH and the signal are QCL
  • the DMRS of the i-th PDSCH and The QCL type of the one signal is the one QCL type.
  • the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate a transmission configuration number-state TCI-state, the one The TCI-state is included in the S1 TCI-states, and the one TCI-state is used to indicate that the DMRS of the i-th PDSCH is at least one signal of QCL, and the DMRS used to indicate the i-th PDSCH and the The QCL type of each signal in at least one signal.
  • each TCI-state in the S1 TCI-states is used to indicate at least one signal and a QCL type corresponding to each signal in the at least one signal.
  • the method includes: receiving third indication information from the network device, where the third indication information is used to indicate the S1 TCI-state information.
  • the second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate a first pattern, and the first pattern is included in Among the F1 candidate first patterns, each of the F1 candidate first patterns is used to indicate TCI-state, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, and the The j-th TCI-state in the r i TCI-states corresponding to the i-th frequency domain resource in the two TCI-states is used to indicate at least one signal and the QCL type corresponding to each signal in the at least one signal.
  • At least one signal indicated by the j-th TCI-state in the r i- th TCI-states corresponding to the i-th frequency domain resource indicated by a second pattern indicated by the second indication information and the j-th child of the i-th frequency domain resource is QCL, where r i is an integer greater than or equal to 1, j ranges from 1 to r i , and F1 is an integer greater than or equal to 1.
  • the method includes: receiving third indication information from the network device, where the third indication information is used to indicate the F1 candidate first patterns.
  • the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate a second pattern, and the second pattern is included in In the P1 candidate second patterns, each second pattern in the P1 candidate second patterns is used to indicate the first pattern of each time unit in a group of time units.
  • the introduction of the first pattern is the same as the previous article, so I won't repeat it here.
  • the first pattern indicated by the first pattern At least one signal indicated by the jth TCI-state in the ith TCI-stater i corresponding to the i -th frequency domain resource in each TCI-state and transmitted on the jth sub-frequency domain resource of the i-th frequency domain resource
  • the DMRS of PDSCH is QCL.
  • the i-th PDSCH is transmitted in the first time unit.
  • the method includes: receiving third indication information from the network device, where the third indication information is used to indicate the P1 candidate second patterns.
  • the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate Z2 third patterns, and the Z2 The three patterns are included in the Z1 candidate third patterns; wherein, for one third pattern among the Z2 third patterns, the one third pattern corresponds to one TCI-state, and the one third pattern is used for instruct Elements, the Elements corresponding to the first frequency domain resource to the Nth frequency domain resource in a one-to-one manner Sub-frequency domain resources, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, for the One of the r i elements corresponding to the i-th frequency domain resource among the elements.
  • the DMRS of the i-th PDSCH transmitted on the sub-frequency domain resource corresponding to the one element At least one signal indicated by the one TCI state is QCL, and the corresponding QCL type is the QCL type indicated by the one TCI-state.
  • the method includes: receiving third indication information from the network device, where the third indication information is used to indicate the Z1 candidate third patterns.
  • the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate X2 fourth patterns, and the X2 fourth patterns Four patterns are included in the X1 candidate fourth patterns; wherein, for one fourth pattern among the X2 fourth patterns, the one fourth pattern corresponds to one TCI-state, and the one fourth pattern corresponds to one TCI-state.
  • the pattern is used to indicate the corresponding to each time unit in a set of time units Elements, the Elements corresponding to the first frequency domain resource to the Nth frequency domain resource in a one-to-one manner Sub-frequency domain resources, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource; for the first time unit One of the r i elements corresponding to the i-th frequency domain resource among the elements.
  • the at least one signal indicated by the one TCI state is QCL
  • the one TCI-state is also used to indicate the QCL type corresponding to each signal in the at least one signal, wherein the i-th PDSCH is in the The first time unit is transmitted.
  • the method includes: receiving third indication information from the network device, where the third indication information is used to indicate the X1 candidate fourth patterns.
  • a method for repeated transmission of data including: sending N repeated data to a terminal device, wherein the i-th repeated data in the N repeated data is set by using the i-th antenna port set at the i-th antenna port. On each resource, it is carried by the i-th physical downlink shared channel PDSCH.
  • the value of i is 1 to N, that is, the value of i traverses from 1 to N, and N is an integer greater than or equal to 2, and the i-th resource includes the i-th frequency domain resource.
  • the i-th antenna port set includes one or more antenna ports.
  • the one or more antenna ports are the same as one or more antenna ports of the demodulation reference signal DMRS of the i-th PDSCH.
  • the N pieces of repeated data include N identical transport blocks TB.
  • the i-th antenna port set for the introduction of the i-th resource, the i-th antenna port set, the i-th PDSCH, and the DMRS of the i-th PDSCH, please refer to the first aspect, which will not be repeated here.
  • a device in a third aspect, may be a terminal device or another device capable of implementing the method described in the first aspect.
  • the other device can be installed in the terminal device, or can be matched and used with the terminal device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the first aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a processing module and a communication module.
  • the communication module is used to receive N repeated data from the network device, where the i-th repeated data in the N repeated data is to use the i-th antenna port set, on the i-th resource, through It is carried by the i-th physical downlink shared channel PDSCH.
  • the value of i is 1 to N, that is, the value of i traverses from 1 to N, and N is an integer greater than or equal to 2, and the i-th resource includes the i-th frequency domain resource.
  • the processing module is used to process (for example, demodulate and decode) PDSCH.
  • the i-th antenna port set for the introduction of the i-th resource, the i-th antenna port set, the i-th PDSCH, and the DMRS of the i-th PDSCH, please refer to the first aspect, which will not be repeated here.
  • a device in a fourth aspect, may be a network device or another device capable of implementing the method described in the second aspect.
  • the other device can be installed in the network equipment, or can be matched and used with the network equipment.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the second aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a processing module and a communication module.
  • the communication module is used to send N repeated data to the terminal device, where the i-th repeated data in the N repeated data is the i-th antenna port set, on the i-th resource, through It is carried by the i-th physical downlink shared channel PDSCH.
  • the value of i is 1 to N, that is, the value of i traverses from 1 to N, and N is an integer greater than or equal to 2, and the i-th resource includes the i-th frequency domain resource.
  • the processing module is used to generate PDSCH.
  • the i-th antenna port set for the introduction of the i-th resource, the i-th antenna port set, the i-th PDSCH, and the DMRS of the i-th PDSCH, please refer to the second aspect, which will not be repeated here.
  • an embodiment of the present application provides a device, which includes a processor, configured to implement the method described in the first aspect.
  • the device may also include a memory for storing instructions.
  • the memory is coupled with the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect can be implemented.
  • the device may also include a communication interface, and the communication interface is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.
  • the other device may be a network device.
  • the device includes:
  • Memory used to store program instructions
  • the processor is configured to use a communication interface to receive N repeated data from the network device, where the i-th repeated data in the N repeated data uses the i-th antenna port set, on the i-th resource, and passes through the i-th
  • the physical downlink shared channel PDSCH carries.
  • the value of i is 1 to N, that is, the value of i traverses from 1 to N, and N is an integer greater than or equal to 2, and the i-th resource includes the i-th frequency domain resource.
  • the i-th antenna port set for the introduction of the i-th resource, the i-th antenna port set, the i-th PDSCH, and the DMRS of the i-th PDSCH, please refer to the first aspect, which will not be repeated here.
  • an embodiment of the present application provides a device, the device includes a processor, and is configured to implement the method described in the second aspect.
  • the device may also include a memory for storing instructions.
  • the memory is coupled with the processor, and when the processor executes the instructions stored in the memory, the method described in the second aspect can be implemented.
  • the device may also include a communication interface, and the communication interface is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.
  • the other device may be a terminal device.
  • the device includes:
  • Memory used to store program instructions
  • the processor is configured to use the communication interface to send N repeated data to the terminal device, where the i-th repeated data in the N repeated data is the i-th antenna port set, on the i-th resource, and passed through the i-th repetitive data.
  • the physical downlink shared channel PDSCH carries.
  • the value of i is 1 to N, that is, the value of i traverses from 1 to N, and N is an integer greater than or equal to 2, and the i-th resource includes the i-th frequency domain resource.
  • the i-th antenna port set for the introduction of the i-th resource, the i-th antenna port set, the i-th PDSCH, and the DMRS of the i-th PDSCH, please refer to the second aspect, which will not be repeated here.
  • a communication system including the device of the third aspect or the fifth aspect, and the device of the fourth aspect or the sixth aspect.
  • a computer-readable storage medium including instructions, which when run on a computer, cause the computer to execute the method described in the first aspect or the second aspect.
  • a computer program product including instructions, which when run on a computer, cause the computer to execute the method described in the first aspect or the second aspect.
  • a chip system in a tenth aspect, includes a processor and may also include a memory for implementing the method described in the first or second aspect.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • FIG. 1 shows an example flow chart of a method for repeated transmission of downlink data provided by an embodiment of the application
  • FIG. 2 shows an example diagram of a time-frequency resource grid provided by an embodiment of this application
  • FIG. 3 shows an example diagram of a method for repeated transmission of downlink data provided by an embodiment of the application
  • FIG. 6 shows an example diagram of a candidate second pattern provided by an embodiment of this application
  • FIG. 7 shows an example diagram of a candidate third pattern provided by an embodiment of this application.
  • FIG. 8 shows an example diagram of a candidate fourth pattern provided by an embodiment of this application.
  • FIG. 9 shows an example diagram of a flow of data transmission between a base station and a UE according to an embodiment of the application.
  • FIGS 10-11 are diagrams showing an example of the structure of an apparatus provided by an embodiment of this application.
  • LTE long term evolution
  • 5G fifth generation
  • WiFi wireless-fidelity
  • future communication system or a system integrating multiple communication systems, etc.
  • 5G can also be called new radio (NR).
  • mMTC may include one or more of the following communications: industrial wireless sensor network (IWSN) communications, video surveillance (video surveillance) scenarios, and communications with wearable devices Wait.
  • IWSN industrial wireless sensor network
  • video surveillance video surveillance
  • Communication between communication devices may include: communication between a network device and a terminal device, communication between a network device and a network device, and/or communication between a terminal device and a terminal device.
  • the term “communication” can also be described as “transmission”, “information transmission”, or “signal transmission” and so on. Transmission can include sending and/or receiving. Taking the communication between the network device and the terminal device as an example, the technical solution of the embodiment of the present application is described. Those skilled in the art can also use the technical solution for communication between other scheduling entities and subordinate entities, such as between a macro base station and a micro base station.
  • Air interface resources include one or more of the following resources: time domain resources, frequency domain resources, code resources, and space resources.
  • the multiple types may be two, three, four, or more types, which are not limited in the embodiments of the present application.
  • the communication between the network device and the terminal device includes: the network device sends a downlink signal or information to the terminal device, and/or the terminal device sends an uplink signal or information to the network device.
  • "/" can indicate that the associated objects are in an "or” relationship.
  • A/B can indicate A or B; and "and/or” can be used to describe that there are three types of associated objects.
  • the relationship, for example, A and/or B can mean that: A alone exists, A and B exist at the same time, and B exists alone. Among them, A and B can be singular or plural.
  • words such as “first”, “second”, “A”, “B”, etc. may be used to distinguish technical features with the same or similar functions. The words “first”, “second”, “A”, “B” and the like do not limit the quantity and order of execution, and the words “first” and “second” do not limit the difference.
  • words such as “exemplary” or “for example” are used to indicate examples, illustrations, or illustrations, and embodiments or design solutions described as “exemplary” or “for example” should not be interpreted as It is more preferable or advantageous than other embodiments or design solutions.
  • the use of words such as “exemplary” or “for example” is intended to present related concepts in a specific manner to facilitate understanding.
  • the terminal device involved in the embodiment of the present application may also be referred to as a terminal, and may be a device with a wireless transceiver function.
  • the terminal can be deployed on land, including indoor, outdoor, handheld, and/or vehicle-mounted; it can also be deployed on the water (such as a ship, etc.); it can also be deployed in the air (such as aeroplane, balloon, satellite, etc.).
  • the terminal equipment may be user equipment (UE).
  • the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication functions.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, and/or wireless terminals in smart homes, etc.
  • VR virtual reality
  • AR augmented reality
  • Wireless terminals in power grids wireless terminals in smart cities, and/or wireless terminals in smart homes, etc.
  • the network device involved in the embodiment of the present application includes a base station (BS), which may be a device that is deployed in a wireless access network and can communicate with terminal devices wirelessly.
  • the base station may have many forms, such as a macro base station, a micro base station, a relay station, or an access point.
  • the base station involved in the embodiment of the present application may be a base station in a 5G system, a base station in an LTE system, or a base station in other systems, without limitation.
  • the base station in the 5G system may also be referred to as a transmission reception point (TRP) or a next-generation Node B (gNB or gNodeB).
  • TRP transmission reception point
  • gNB next-generation Node B
  • a light terminal device can be introduced relative to a traditional terminal device, such as an eMBB terminal.
  • the light terminal device may also be referred to as a reduced capability (REDCAP) terminal.
  • the eMBB terminal is a terminal capable of transmitting eMBB services.
  • the traditional terminal device can be a high-capacity terminal or a terminal with unlimited capabilities.
  • the traditional terminal equipment can be replaced with a high-capacity terminal that will be introduced in the future relative to the REDCAP terminal.
  • the feature comparison between the high-capability terminal and the REDCAP terminal satisfies at least one of the following items 1 to 9.
  • at least one item may be one or more items, for example, two items, three items or more items, which are not limited in the embodiments of the present application.
  • the first item the maximum bandwidth supported by the high-capability terminal is greater than the maximum bandwidth supported by the REDCAP terminal.
  • the maximum bandwidth supported by a high-capability terminal is 100MHz (megahertz) or 200MHz
  • the maximum bandwidth supported by a REDCAP terminal is 20MHz, 10MHz, or 5MHz.
  • the second item The number of antennas of high-capability terminals is more than that of REDCAP terminals.
  • the number of antennas may be the number of antennas set for the terminal or the maximum number of antennas used for transmission and/or reception.
  • a high-capacity terminal supports up to 4 antennas to receive and 2 antennas to transmit
  • a REDCAP terminal supports up to 2 antennas to receive and 1 antenna to transmit.
  • the antenna selective transmission capabilities are different.
  • both high-capacity terminals and low-capacity terminals support 2-antenna transmission, but high-capacity terminals support antenna selective transmission, and low-capacity terminals do not support antenna selective transmission.
  • high-capacity terminals can realize single-antenna port data transmission and switch between two transmitting antennas, and this data transmission can obtain spatial diversity gain; while low-capacity terminals can only use single-antenna port data transmission at 2 Simultaneous transmission on two transmitting antennas is equivalent to the transmission performance of one transmitting antenna.
  • the maximum transmission power supported by the high-capability terminal is greater than the maximum transmission power supported by the REDCAP terminal.
  • the maximum transmit power supported by the high-capability terminal is 23 decibel-milliwatt (dBm) or 26 dBm
  • the maximum transmit power supported by the REDCAP terminal is a value from 4 dBm to 20 dBm.
  • Item 4 High-capacity terminals support carrier aggregation (CA), and REDCAP terminals do not support carrier aggregation.
  • CA carrier aggregation
  • REDCAP terminals do not support carrier aggregation.
  • the maximum number of carriers supported by the high-capability terminal is greater than the maximum number of carriers supported by the REDCAP terminal.
  • a high-capability terminal supports a maximum of 32 carriers or an aggregation of 5 carriers
  • a REDCAP terminal supports a maximum of 2 carriers.
  • High-capability terminals and REDCAP terminals are introduced in different protocol versions.
  • the high-capability terminal is the terminal introduced in the version (Release, R) 15 of the protocol
  • the REDCAP terminal is the terminal introduced in the R17 of the protocol.
  • Item 7 The duplex capabilities of high-capacity terminals and REDCAP terminals are different.
  • the duplex capability of high-capacity terminals is stronger.
  • high-capacity terminals support full-duplex frequency division duplex (FDD), that is, high-capability terminals support simultaneous reception and transmission when supporting FDD
  • REDCAP terminals support half-duplex FDD, that is, REDCAP terminals do not support FDD. Support simultaneous receiving and sending.
  • FDD frequency division duplex
  • REDCAP terminals support half-duplex FDD, that is, REDCAP terminals do not support FDD. Support simultaneous receiving and sending.
  • Item 8 The data processing capability of high-capacity terminals is stronger than that of REDCAP terminals.
  • a high-capacity terminal can process more data in the same time, or a high-capacity terminal can process the same data in a shorter time.
  • the time when the terminal receives the downlink data from the network device is T1
  • the time when the terminal sends the feedback of the downlink data to the network device is T2
  • the time between T2 and T1 of the high-capability terminal The time delay (time difference) is less than the time delay between T2 and T1 of the REDCAP terminal.
  • the feedback of downlink data may be ACK or NACK feedback.
  • the peak data transmission rate of the high-capacity terminal is greater than the peak data transmission rate of the REDCAP terminal.
  • the data transmission includes uplink data transmission (that is, the terminal sends data to the network device) and/or downlink data transmission (that is, the terminal receives data from the network device).
  • the high-capability terminal may also be referred to as a non-REDCAP terminal.
  • the REDCAP terminal can be applied to various scenarios such as the Internet of Things, mMTC, or V2X. As described above, the limited capabilities of the REDCAP terminal will cause the terminal's uplink and/or downlink coverage to be limited, thereby affecting the data transmission rate. In order to improve the coverage of the REDCAP terminal, an embodiment of the present application provides a method for repeated transmission of data, and in particular, a method for repeated transmission of downlink data is proposed.
  • the method provided in the embodiments of the present application can also be applied to other types of terminals, such as high-capacity terminals (such as eMBB terminals, or URLLC terminals supporting URLLC services) to improve the coverage of the terminals, thereby improving user experience.
  • high-capacity terminals such as eMBB terminals, or URLLC terminals supporting URLLC services
  • the embodiment of the present application takes the REDCAP terminal as an example for description.
  • the device used to implement the function of the terminal device may be a terminal device; it may also be a device capable of supporting the terminal device to implement the function, such as a chip system.
  • the device can be installed in terminal equipment or matched with terminal equipment.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal equipment is the terminal equipment, and the terminal equipment is the UE as an example to describe the technical solutions provided in the embodiments of the present application.
  • the device used to implement the function of the network device may be a network device; it may also be a device capable of supporting the network device to implement the function, such as a chip system.
  • the device can be installed in or matched with network equipment.
  • the device used to implement the functions of the network equipment is the network equipment, and the network equipment is a base station as an example to describe the technical solutions provided by the embodiments of the present application.
  • Figure 1 shows a method for repeated transmission of downlink data provided by an embodiment of the application.
  • the base station sends N repeated data to the UE, where the i-th repeated data in the N repeated data is carried on the i-th resource and through the i-th downlink channel by using the i-th antenna port set. in.
  • the value of i is 1 to N, and N is an integer greater than or equal to 2.
  • the value of i can also be 0 to N-1.
  • N is 2, 3, 4, 6 or other integers, which is not limited in the embodiment of the present application.
  • the UE receives the N repeated data from the base station.
  • the UE can access the base station and communicate with the base station.
  • a base station can manage one or more (for example, 2, 3, or 6, etc.) cells, and the UE can access the base station in at least one of the one or more cells, and access the base station in the UE. Communicate with the base station in the accessed cell.
  • the UE accessing the base station in the at least one cell can also be described as: the UE accesses the at least one cell.
  • at least one may be one, two, three, or more, which is not limited in the embodiments of the present application.
  • the base station may send downlink data to the UE through a downlink channel, for example, a downlink physical channel.
  • the downlink channel may be a physical downlink shared channel (PDSCH) or a channel with other names, which is not limited in the embodiment of the present application.
  • PDSCH physical downlink shared channel
  • the base station sending downlink data to the UE through the PDSCH can also be described as: the base station sends the PDSCH to the UE, and the PDSCH carries the downlink data.
  • the base station sending N repeated data to the UE includes sending N repeated transport blocks (TB) to the UE.
  • the N repeated TBs are N TBs carrying the same information.
  • the N TBs carrying the same information are N identical TBs, or the N TBs carrying the same information are N TBs with different redundancy versions.
  • the base station sends a TB to the UE, it can also perform physical layer operations on the TB.
  • the physical layer operation includes at least one of the following sub-operations: segmentation, adding cyclic redundancy check (cyclic redundancy check, CRC), channel coding, scrambling, layer mapping, precoding, and modulation.
  • the physical layer operations for the two TBs may be the same or different; if the physical layer operations for the two TBs both include the same During the sub-operation, the configuration parameters for the sub-operation may be the same or different, and the embodiment of the present application does not impose restrictions. For example, when the physical layer operations for the two TBs both include channel coding, the code rate may be different; and/or when the physical layer operations for the two TBs both include modulation, the modulation order may be different.
  • the base station may perform physical layer operations on the bit stream of the TB carried on the PDSCH, convert the output signal of the physical layer operation into a radio frequency signal, and send the radio frequency signal to the UE through the antenna array on the base station side.
  • the base station can use beamforming technology based on the antenna array to transmit the PDSCH in the form of a beam.
  • the antenna array may be installed on the base station, connected (wired or wirelessly) to the base station, or exist on the base station side in other forms, which is not limited in the embodiment of the present application.
  • the beamforming technology weights the large-scale antenna array so that the transmission energy is concentrated in a certain direction, such as the direction where the UE is located, thereby increasing the efficiency of the UE to receive downlink signals and increasing the coverage distance of the network.
  • the beamforming technology may reduce the lateral coverage of the transmitted radio frequency signal.
  • the communication between the UE and the base station may be rapidly weakened or even interrupted. Beam recovery can be performed after communication is interrupted, but the time required for beam recovery is very long, about 100 milliseconds (millisecond, ms).
  • the base station may repeatedly send downlink data to the UE through multiple beams, for example, the data is sent repeatedly on each beam, so as to increase the robustness of the transmitted data.
  • the method based on the beamforming technology provided in the embodiments of the present application can be applied to frequency range (Frequency Range, FR) 2 frequency bands.
  • the FR2 frequency band is a millimeter wave (MMW) frequency band with a frequency value greater than 24 gigahertz (giga hertz, GHz).
  • MMW millimeter wave
  • the base station can use frequency domain resources in the frequency band to transmit data to the UE. Due to the small size of the MMW band antenna, it is conducive to the application of large-scale antenna arrays, and therefore the application of beamforming technology.
  • the embodiments of the present application are not limited thereto, and the methods provided in the embodiments of the present application may also be applied to other frequency bands, such as the FR1 frequency band, or other radio frequency bands between 6 GHz and 24 GHz.
  • the FR1 frequency band is a frequency band with a frequency value of less than 6 GHz.
  • the base station and UE can use antenna ports to transmit PDSCH in the form of beams through physical transmitting antennas.
  • the base station and UE can use one or more antenna ports to transmit PDSCH.
  • Each antenna port of the multiple antenna ports may correspond to a same time-frequency resource grid.
  • the time-frequency resource grid is used to describe time-frequency resources within a time unit.
  • the time unit includes one or more symbols.
  • the time unit may be a subframe, or a time slot, etc., which is not limited in the embodiment of the present application.
  • Figure 2 shows an example diagram of a time-frequency resource grid.
  • the time domain of the time-frequency resource grid is a time slot including 14 symbols, and the frequency-domain resource of the time-frequency resource grid includes one or more sub Carrier.
  • One symbol in the time domain and one subcarrier in the frequency domain form a resource element (RE).
  • RE resource element
  • RE is the minimum time-frequency resource granularity used to map data.
  • one or more (for example, 6 or 12, etc.) subcarriers may be included in one resource block (resource block, RB).
  • An RB may also include the concept of time domain, for example, a group of REs formed by one or more (for example, 2, 4, 7, or 14) symbols in the time domain and one or more subcarriers in the frequency domain is included in one RB , Or described as one RB including one or more symbols in the time domain and one or more subcarriers in the frequency domain.
  • one RB includes 12 subcarriers in the frequency domain.
  • the antenna port is a logical concept.
  • One antenna port can correspond to one physical transmit antenna or multiple physical transmit antennas. In these two cases, the UE does not need to know whether the PDSCH from the same antenna port is from one or more physical transmit antennas. In order to achieve PDSCH reception, the UE does not need to know whether the PDSCH is a PDSCH transmitted by a single physical transmit antenna or a PDSCH combined by multiple PDSCHs transmitted by multiple physical transmit antennas. The UE analyzes the corresponding antenna port of the PDSCH. .
  • the antenna port of the PDSCH demodulation reference signal (demodulation reference signal, DMRS) can be configured in a predefined manner or in a manner instructed by the base station for the UE through signaling.
  • the antenna ports of the PDSCH and the antenna ports of the DMRS of the PDSCH have a one-to-one correspondence.
  • one antenna port of the PDSCH uniquely corresponds to one antenna port of the DMRS of the PDSCH.
  • the two antenna ports are the same antenna port.
  • the UE can receive the DMRS transmitted on the antenna port, use the received DMRS to perform channel estimation, and use the channel estimation result to demodulate and decode the PDSCH.
  • the UE can receive the DMRS transmitted on each antenna port, use the received multiple DMRS to perform channel estimation, and use the channel estimation result to demodulate and decode the PDSCH.
  • a beam may be weighted and formed by signals sent on one or more antenna ports.
  • One or more antenna ports used to form a beam can be regarded as an antenna port set.
  • the signals sent on n antenna ports are used to form a beam y, where n is an integer greater than or equal to 1, then it can be considered Among them, the value of j ranges from 0 to n-1, s j represents the signal sent on the j+1th antenna port, and w j represents the weighting coefficient of the signal sent on the j+1th antenna port.
  • w j is a complex number with an amplitude of 1, and w j ⁇ s j indicates that s j is phase rotated.
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n 1
  • n is greater than 1, it means that the wide beams transmitted on multiple antenna ports are weighted to form a narrow beam.
  • the base station can use the same beam to transmit the PDSCH and the DMRS of the PDSCH, that is, the base station uses the same antenna port to transmit the PDSCH and the DMRS of the PDSCH, so the UE does not need to know how the base station side uses the signal sent on the antenna port to form the transmit beam .
  • the goal of the UE is to receive the PDSCH correctly. Therefore, as described above, the UE can estimate the channel of each antenna port of the DMRS of the PDSCH, and use the channel estimation result to demodulate and decode the PDSCH.
  • the names of the PDSCHs sent on different beams are distinguished.
  • the multiple PDSCHs may also be referred to as repeated PDSCHs.
  • the method shown in FIG. 1 can also be described as: the base station uses N beams to send N repeated data to the UE.
  • the i-th repetitive data in the N repetitive data is carried on the i-th resource on the i-th downlink channel by using the i-th beam among the N beams.
  • the value of i is 1 to N, and N is an integer greater than or equal to 2. That is, the i-th beam corresponds to the i-th antenna port set.
  • the i-th antenna port set includes one or more antenna ports. The number of antenna ports included in different antenna port sets may be the same or different, which is not limited in the embodiment of the present application.
  • the antenna ports included in the i-th antenna port set may be predefined, or may be indicated by the base station through signaling, such as first indication information or other signaling, for the UE.
  • the base station indicates the antenna port of the DMRS of the i-th PDSCH for the UE through signaling, such as RRC signaling, MAC CE, or DCI.
  • the DCI may be the DCI used to schedule the i-th PDSCH, that is, the DCI carries the transmission parameters of the i-th PDSCH.
  • the UE After receiving the signaling, the UE determines the antenna port of the DMRS of the i-th PDSCH, and determines that the antenna port of the i-th PDSCH is the same as the antenna port of the DMRS of the i-th PDSCH, that is, determines that the antenna port of the i-th PDSCH is that of the i-th PDSCH Antenna port of DMRS.
  • the DMRS of the i-th PDSCH and the i-th PDSCH are transmitted, the DMRS of the i-th PDSCH and the i-th PDSCH are mapped to the time-frequency resources of the same antenna port.
  • the antenna ports of the DMRS of the i-th PDSCH and the i-th PDSCH are the same, and the antenna port (set) of the i-th PDSCH can also be described as the antenna port (set) of the DMRS of the i-th PDSCH.
  • multiple beams are used to repeatedly transmit the PDSCH.
  • the base station repeatedly sends downlink data to the UE through the first beam (beam 1) and the second beam (beam 2), and the UE correctly receives any one of the repeated downlink data, and the data can be correct. take over. Therefore, this method can increase the coverage of the network and reduce the communication interruption between the base station and the UE.
  • the base station can independently set beams or set the weighting values for beam formation for different UEs according to one or more of the following parameters: the location of the UE, the moving speed of the UE, and so on.
  • the number of antenna port sets of different UEs may be the same or different.
  • the number of antenna ports included in a single antenna port set of different UEs may be the same or different.
  • each antenna port can correspond to the same time-frequency resource grid.
  • the frequency domain resources of the time-frequency resource grid corresponding to the antenna port may be referred to as the available frequency domain resources of the antenna port.
  • Part or all of the resources for the PDSCH of the UE may be allocated from the available frequency domain resources of the antenna port for the base station to send the PDSCH to the UE.
  • the time domain resources of the PDSCH may be predefined, or configured by the base station for the UE through signaling, which is not limited in the embodiment of the present application.
  • the DMRS of the PDSCH can be mapped to the time-frequency resource of the PDSCH, or mapped to the time-frequency resource related to the time-frequency resource of the PDSCH (for example, in the previous symbol adjacent to the time-frequency resource, or the time-frequency resource).
  • the symbols after the adjacent resource are sent by the base station to the UE.
  • the frequency domain resources allocated for the PDSCH include one or more RBs, or one or more resource block groups (RBG). Among them, one RBG includes one or more RBs, for example, 4, 6, 8, or 9 RBs.
  • transmission is performed with beam granularity, that is, the base station uses the same resource to send the PDSCH to the UE on each antenna port in an antenna port set.
  • the i-th resource is set for the i-th PDSCH, the value of i is 2 to N, and N is an integer greater than or equal to 2.
  • the i-th resource includes the i-th frequency domain resource.
  • the i-th frequency domain resource may be predefined, or may be indicated by the base station through signaling, such as the first indication information, for the UE.
  • the i-th resource includes the i-th time domain resource.
  • the i-th time domain resource may be predefined, or may be indicated by the base station through signaling, such as the first indication information, for the UE.
  • a total of N time domain resources from the first time domain resource to the Nth time domain resource in the method shown in FIG. 1 are all indicated by the base station for the UE through the first indication information.
  • the type of signaling, message, or (indication) information sent by the base station to the UE may be broadcast message, system information block (SIB), radio resource control (RRC) Signaling, media access control (MAC) control element (CE), or downlink control information (DCI) are not limited in this embodiment of the application.
  • SIB system information block
  • RRC radio resource control
  • MAC media access control
  • CE control element
  • DCI downlink control information
  • the type of the first indication information is RRC, MAC CE, or DCI.
  • the first indication information is the DCI used to schedule the first PDSCH to the Nth PDSCH, and the DCI carries the transmission parameters of the first PDSCH to the Nth PDSCH.
  • the method shown in Figure 1 can improve the robustness of data transmission under the condition of low resource utilization. If the N frequency domain resources in this method are not independently configured, but the same frequency domain resource is configured, in order to avoid channel fading in a frequency domain causing a large amount of distortion of the transmitted data, it may be necessary to configure the same frequency domain resources.
  • the frequency domain resource is a wider frequency domain resource to use frequency diversity gain to increase the robustness of the transmitted data. At this time, resources may be wasted.
  • the method shown in FIG. 1 independently configures each of the N frequency domain resources, so that the combined equivalent bandwidth of the N frequency domain resources can be configured, without requiring the bandwidth of each frequency domain resource. Both are relatively large.
  • this method can not only use frequency diversity gain to improve the robustness of data transmission, but also because the bandwidth of each frequency domain resource does not need to be too large, it will not cause excessive receiving processing burden on the UE.
  • this method can relieve the pressure of receiving and processing, reduce the power consumption of the terminal, and therefore can reduce the cost of the terminal.
  • the method shown in FIG. 1 mainly emphasizes the independent configuration of each frequency domain resource, so that fewer resources can be used in the system to improve the robustness of data transmission, instead of having to emphasize the configuration result of frequency domain resources.
  • the base station may configure the N frequency domain resources of some UEs to be the same, and the N frequency domain resources of some UEs to be configured to be different.
  • the configuration may be determined based on at least one of the traffic volume in the cell, the processing capabilities of each UE, and the scheduling priority.
  • the receiving end can use the reference signal to perform channel estimation for demodulating data channels or obtaining channel state information.
  • the reference signal can also be called a pilot.
  • the UE may use the DMRS of the PDSCH to perform channel estimation for demodulating and decoding the PDSCH.
  • the sequence value of the reference signal is predefined, and is known by both the sending end and the receiving end. Then, the receiving end can estimate the channel experienced by the reference signal based on the value of the received reference signal and the value of the sent reference signal, that is, it can perform channel estimation.
  • the receiver uses the reference signal for channel estimation, it can estimate the large-scale parameters of the channel, such as delay spread, average delay, doppler spread, and Doppler shift ( One or more of the doppler shift) and spatial reception parameters (spatial reception parameters), and the estimated large-scale parameters are used for channel estimation.
  • the spatial reception parameters can be used for multiple-input multiple-output (MIMO) transmission, and the spatial reception parameters can include one or more of the following: angle of arrival (AOA), average AOA, AOA Extension, angle of departure (AOD), average angle of departure AOD, AOD extension, receiving antenna spatial correlation parameter, transmitting antenna spatial correlation parameter, transmitting beam, receiving beam, and resource identification.
  • the reference signal A and another signal B may be configured to be quasi co-location (QCL). That is, the large-scale parameters of the channel configured to transmit the reference signal A and the channel used to transmit the signal B are approximately the same. Therefore, if the receiving end estimates the large-scale parameters experienced by the signal B in its channel, the large-scale parameters can be used to estimate the channel of the reference signal A.
  • QCL quasi co-location
  • a method for configuring the QCL information of the DMRS of the i-th PDSCH will be introduced, where the value of i is 1 to N, and N is an integer greater than or equal to 2.
  • the DMRS of the i-th PDSCH may be referred to as the i-th DMRS.
  • the QCL information of the i-th DMRS may also be referred to as the QCL information of the i-th antenna port set.
  • the one or more antenna ports included in the i-th antenna port set are the same as the antenna port of the i-th DMRS, that is, the i-th DMRS is also transmitted through one or more antenna ports included in the i-th antenna port set.
  • Both the i-th DMRS and the i-th PDSCH are mapped to time-frequency resources corresponding to one or more antenna ports included in the i-th antenna port set.
  • the QCL information of the i-th DMRS may also be referred to as the i-th QCL information, or the QCL information of the i-th frequency domain resource, etc., which is not limited in the embodiment of the present application.
  • QCL can be independently configured for the DMRS of the PDSCH corresponding to each antenna port set. Information to obtain the channel estimation of each PDSCH more accurately, thereby improving the accuracy of demodulating and decoding PDSCH on the UE side.
  • the base station can indicate the QCL information of the first DMRS to the Nth DMRS to the UE through the same signaling; or the base station may indicate the first DMRS to the Nth DMRS to the UE through multiple signalings (such as N signaling).
  • the base station sends the second indication information to the UE, which is used to indicate the QCL information of the i-th DMRS, where the value of i is 1 to N, and N is an integer greater than or equal to 2.
  • the base station may indicate the QCL information of the DMRS of the PDSCH transmitted on an antenna port or a set of antenna ports for the UE through the method described in any one of the following examples A to F.
  • an antenna port set may also be described as an antenna port set.
  • the i-th antenna port set when the i-th antenna port set includes one antenna port, the i-th antenna port set may also be referred to as the i-th antenna port.
  • the base station may indicate to the UE that the i-th DMRS is a QCL signal (denoted as signal A).
  • the QCL type of the i-th DMRS and signal A may be predefined, or the base station may indicate the QCL type of the i-th DMRS and signal A for the UE through signaling.
  • the signaling may be the second indication information or other signaling, which is not limited in the embodiment of the present application.
  • the signal A may be one signal or multiple signals, which is not limited in the embodiment of the present application.
  • the second indication information may be a system message, an RRC message, MAC CE, or DCI.
  • the signal that is the QCL and the other signal may be a downlink reference signal or a downlink channel, for example, may be one or more of the following signals: synchronization signal (synchronization signal, SS), master synchronization signal ( primary synchronization signal (PSS), secondary synchronization signal (secondary synchronization signal, SSS), physical broadcast channel (physical broadcast channel, PBCH), synchronization signal block (synchronization signal and PBCH block, SSB), DMRS of PBCH, DMRS of PDCCH, PDSCH DMRS, channel state information reference signal (channel state information-reference signal, CSI-RS), and tracking reference signal (tracking reference signal, TRS).
  • the PDCCH may be a PDCCH used to schedule the PDSCH, or other PDCCH, which is not limited in the embodiment of the present application.
  • SSB includes PSS, SSS and PBCH.
  • the QCL type is used to indicate the type of quasi co-located large-scale parameters between signals (for example, between signal B and signal C).
  • the type may be one or more of Type A to Type D described below.
  • Type A (QCL_A): denoted as ⁇ Doppler frequency shift, Doppler spread, delay spread, average delay ⁇ . Indicates that the Doppler frequency shift, Doppler spread, delay spread, and average delay of signal B and signal C are correlated. Then the receiving end can use the Doppler shift, Doppler spread, delay spread, and average delay experienced by the signal B to perform channel estimation on the channel experienced by the signal C; or the receiving end can use the experience experienced by the signal C Doppler frequency shift, Doppler spread, time delay spread, and average delay of the signal B are used for channel estimation of the channel experienced by signal B. That is, it is considered that the Doppler shift, Doppler spread, delay spread, and average delay experienced by signal B are respectively the same as the Doppler shift, Doppler spread, delay spread, and average delay experienced by signal C. The delay is approximately the same.
  • Type B denoted as ⁇ Doppler frequency shift, Doppler spread ⁇ . It means that the Doppler frequency shift and Doppler spread of signal B and signal C are correlated. Then the receiving end can use the Doppler shift and Doppler spread experienced by the signal B to perform channel estimation on the channel experienced by the signal C; or the receiving end can use the Doppler shift and Doppler spread experienced by the signal C. Re-spreading, channel estimation is performed on the channel experienced by signal B. That is, it is considered that the Doppler shift and Doppler spread experienced by the signal B are approximately the same as the Doppler shift and Doppler spread experienced by the signal C, respectively.
  • Type C (QCL_C): denoted as ⁇ delay extension, average delay ⁇ . Indicates that the delay spread of signal B and signal C is correlated with the average delay. Then the receiving end can use the delay spread and average delay experienced by signal B to perform channel estimation on the channel experienced by signal C; or, the receiving end can use the delay spread and average delay experienced by signal C to estimate the signal B Channel estimation is performed on the experienced channel. That is, it is considered that the delay spread and average delay experienced by signal B are approximately the same as the delay spread and average delay experienced by signal C, respectively.
  • Type D (QCL_D): denoted as ⁇ space receiving parameter ⁇ . Indicates that the spatial reception parameters of signal B and signal C are correlated. Then the receiving end can use the spatial reception parameters experienced by signal B to perform channel estimation on the channel experienced by signal C; or, the receiving end can use the spatial reception parameters experienced by signal C to perform channel estimation on the channel experienced by signal B.
  • the foregoing types A to D are used as examples, and the embodiments of the present application may also include other QCL types. That is, it is considered that the spatial reception parameters experienced by the signal B and the spatial reception parameters experienced by the signal C are approximately the same.
  • the base station may configure for the UE one or more signals that are QCL with the i-th DMRS.
  • the base station may use the second indication information to configure its QCL information for the UE as: SSB
  • the base station may use the second indication information to configure its QCL information for the UE as: SSB
  • the base station can indicate the QCL information of the i-th DMRS for the UE from the M1 set of candidate QCL information.
  • the QCL information of the i-th DMRS is the M2 set of QCL information in the M1 set of candidate QCL information, where M1 is greater than An integer equal to 1, and M2 is an integer greater than or equal to 1 and less than or equal to M1.
  • the set of QCL information indicates a signal.
  • the QCL type corresponding to the signal can be pre-configured, or the set of QCL information indicates the QCL type corresponding to the signal.
  • the signal and DMRS indicated by the set of QCL information are QCL.
  • the corresponding QCL type is the QCL type indicated by the set of QCL information.
  • each set of QCL information in the foregoing M1 set of candidate QCL information uniquely corresponds to an index
  • the M1 set of candidate QCL information corresponds to a total of M1 indexes.
  • the base station indicates to the UE the M2 indexes of the M1 indexes through the second indication information, and the M2 sets of QCL information corresponding to the M2 indexes are the QCL information of the i-th DMRS.
  • the length of the bit information used to indicate any one of the M2 indexes is Bits, of which, Indicates rounding up.
  • Table 1 shows 6 sets of candidate QCL information. It can be understood that the QCL information shown in Table 1 is only used as an example, and does not constitute a limitation to the embodiments of the present application.
  • the base station may indicate 2 indexes through the second indication information, so as to configure the QCL information of the i-th DMRS for the UE.
  • the decimal values of the 2 indexes are 0 and 4, or the binary values of the 2 indexes are 000 and 100, respectively.
  • the UE After the UE receives the second information, it can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and SSB are correlated with the average delay, and the spatial reception of the i-th DMRS and CSI-RS The parameters are relevant.
  • the UE can use the Doppler frequency shift, Doppler spread, delay spread, and average delay estimated according to the SSB, and can use the spatial reception parameters estimated according to the CSI-RS to perform channel estimation on the i-th DMRS,
  • the i-th PDSCH can be demodulated and decoded by using the channel estimation result.
  • the base station indicates the M2 set of QCL information in the M1 set of candidate QCL information for the UE through M1 elements, and the M2 set of QCL information is the QCL information of the ith DMRS.
  • the M1 elements correspond to the M1 set of candidate QCL information one-to-one.
  • the QCL information of the i-th DMRS includes a set of QCL information corresponding to the element.
  • the first QCL information i The QCL information of the DMRS does not include a set of QCL information corresponding to this element.
  • t1 and t2 are integers, for example, t1 is 1, and t2 is 0.
  • the M1 elements may be a bitmap including M1 bits, M1 cells, or M1 information, etc., which are not limited in the embodiment of the present application.
  • the base station can configure the QCL information of the i-th DMRS for the UE through the bitmap in the second indication information.
  • the bitmap includes 6 bits, and the value of the bitmap is 100001.
  • the UE After the UE receives the second information, it can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and SSB are correlated, and the spatial reception parameters of the i-th DMRS and TRS have Correlation.
  • the UE can use the Doppler frequency shift, Doppler spread, delay spread, and average delay estimated according to the SSB, and can use the spatial reception parameters estimated according to the TRS to perform channel estimation on the i-th DMRS, and use this
  • the channel estimation result can demodulate and decode the i-th PDSCH.
  • the M1 set of candidate QCL information may be predefined, or may be indicated by the base station for the UE through third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • third indication information such as a broadcast message, SIB, RRC signaling, or MAC CE.
  • the second indication information may be RRC signaling, MAC CE, or DCI.
  • the M1 set of candidate QCL information is predefined, and the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is a broadcast message or SIB
  • the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is RRC signaling
  • the second indication information is MAC CE or DCI.
  • the third indication information is MAC CE
  • the second indication information is DCI
  • the second indication information and the first indication information are the same DCI.
  • the base station When the base station indicates the M1 set of candidate QCL information for the UE through the third indication information, it may directly indicate the specific configuration of the M1 set of candidate QCL information, or may indicate the activated M1 set of candidate QCL information from the M3 set of candidate QCL information.
  • the M3 set of candidate QCL information may be predefined, or indicated by the base station for the UE through fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the M3 set of candidate QCL information is predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.
  • the fourth indication information is a broadcast message or SIB
  • the third indication information is RRC signaling.
  • the fourth indication information is a broadcast message, SIB or RRC signaling, and the third indication information is MAC CE.
  • the method for the base station to indicate the activated M1 set of candidate QCL information from the M3 set of candidate QCL information through the fourth indication information is similar to the above-mentioned method for indicating the M2 set of QCL information from the M1 set of candidate QCL information, and will not be repeated here.
  • the base station can indicate the TCI-state of the i-th DMRS for the UE from S1 candidate transmission configuration index (TCI)-states.
  • TCI transmission configuration index
  • the TCI-state of the i-th DMRS is one of the S1 candidate TCI-states
  • S1 is an integer greater than or equal to 1.
  • the TCI-state indicates at least one signal and a QCL type corresponding to each of the at least one signal.
  • at least one signal indicated by the i-th DMRS and the one TCI-state is QCL
  • the corresponding QCL type is the QCL type indicated by the one TCI-state.
  • the foregoing method of indicating one TCI-state from S1 candidate TCI-states is similar: when M2 is equal to 1, the foregoing method of indicating M2 sets of QCL information from M1 sets of candidate QCL information is not repeated here.
  • Table 2 shows three candidate TCI-states. It can be understood that the TCI-state shown in Table 2 is only an example, and does not constitute a limitation to the embodiments of the present application.
  • the base station can use the Bit, indicating the TCI-state of the i-th DMRS for the UE.
  • the binary value of the 2 bits is 10.
  • the UE After the UE receives the second information, it can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and TRS are correlated with the spatial reception parameters of the CSI-RS Correlation.
  • the 2-bit binary value is 00.
  • the UE can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and TRS are correlated.
  • the information of the S1 candidate TCI-states may be predefined, or may be indicated by the base station for the UE through third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • third indication information such as a broadcast message, SIB, RRC signaling, or MAC CE.
  • the second indication information may be RRC signaling, MAC CE, or DCI.
  • the S1 candidate TCI-states are predefined, and the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is a broadcast message or SIB
  • the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is RRC signaling
  • the second indication information is MAC CE or DCI.
  • the third indication information is MAC CE
  • the second indication information is DCI
  • the second indication information includes a TCI field, which is used by the base station to indicate the TCI-state for the UE.
  • the second indication information and the first indication information are the same DCI.
  • the base station indicates the S1 candidate TCI-states for the UE through the third indication information, and may directly indicate the specific configuration of the S1 candidate TCI-states, or may indicate the activated S1 candidate TCI-states from the S2 candidate TCI-states -state.
  • the S2 candidate TCI-states may be predefined, or indicated by the base station for the UE through the fourth indication information (such as broadcast message, SIB, RRC signaling, or MAC CE).
  • the S2 candidate TCI-states are predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.
  • the fourth indication information is a broadcast message or SIB
  • the third indication information is RRC signaling.
  • the fourth indication information is a broadcast message, SIB or RRC signaling, and the third indication information is MAC CE.
  • the method for the base station to indicate the activated S1 candidate TCI-states from the S2 candidate TCI-states through the fourth indication information is similar to the above-mentioned method for indicating M2 sets of QCL information from the M1 set of candidate QCL information, which will not be repeated here.
  • the base station indicates a first pattern for the UE from the F1 candidate first patterns (patterns), and the first pattern indicates each of the frequency domain resources from the first frequency domain resource to the Nth frequency domain resource.
  • the first pattern indicates TCI-state.
  • r i is the number of sub-frequency domain resources included in the i-th frequency domain resource.
  • the r i of different frequency domain resources may be the same or different.
  • r i is an integer greater than or equal to 1, the value of i is 1 to N, and N is an integer greater than or equal to 2.
  • the r i of at least one frequency domain resource is an integer greater than or equal to 2.
  • the size of the different sub-frequency domain resources may be the same or different, which is not limited in the embodiment of the present application.
  • the size of the sub-frequency domain resource may be the number of sub-carriers, the number of RBs, or the number of RBGs included in the sub-frequency domain resource, or the bandwidth of the sub-frequency domain resource.
  • the value of r i may be predefined, or may be indicated by the base station for the UE through signaling.
  • the frequency domain resource r i th size, or the frequency domain resource r i for each sub-sub-frequency domain resource in the ratio of the size of the frequency domain resource is predefined, or the base station for the UE by a signaling indication.
  • the bandwidth of the i-th frequency domain resource is U i RBs
  • the size of the r i sub-frequency domain resources of the i- th frequency domain resource is the same, and each sub-frequency domain resource includes RB, if U i cannot be divisible by r i , the remaining frequency domain resource RBs are not used to map the i-th PDSCH, that is, the i-th PDSCH is mapped to the r i sub-frequency domain resources RB on. in, Indicates rounding down.
  • the TCI-state of the j-th frequency domain resource of the i-th frequency domain resource indicates at least one signal and the QCL type corresponding to each signal in the at least one signal.
  • the TCI-state of the j-th frequency domain resource of the i-th frequency domain resource indicated by the first pattern indicates that the DMRS of the PDSCH transmitted on the j-th frequency domain resource is At least one signal of QCL, and a QCL type indicating the DMRS and each of the at least one signal.
  • j takes a value from 1 to r i .
  • the DMRS of the PDSCH transmitted on the j-th sub-frequency domain resource has one or more of the following characteristics: it is transmitted in the j-th sub-frequency-domain resource and in the bandwidth corresponding to the j-th sub-frequency-domain resource Transmission, and used to demodulate and decode the PDSCH transmitted on the j-th sub-frequency domain resource, etc.
  • the method for indicating a first pattern from the F1 candidate first patterns is similar: when M2 is equal to 1, the foregoing method for indicating M2 sets of QCL information from M1 sets of candidate QCL information is not repeated here.
  • each frequency domain resource includes 2 sub-frequency domain resources.
  • Table 3 shows 4 kinds of candidate first patterns. It can be understood that the first pattern shown in Table 3 is only used as an example, and does not constitute a limitation to the embodiment of the present application. Assume that the TCI-state indicated in Table 3 is the TCI-state shown in Table 2.
  • FIG. 4 shows an example diagram of the candidate first pattern corresponding to Table 3.
  • the base station can use the Bit, configure the first pattern of the UE for the UE.
  • the binary value of the 2 bits is 10.
  • the UE After the UE receives the second information, it can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the first frequency domain resource of the first frequency domain resource is 0, that is, the UE can determine the Doppler frequency of the DMRS and TRS Shift, Doppler spread, delay spread, and average delay are related; it can be determined that the index of the TCI-state of the DMRS of the PDSCH transmitted on the second sub-frequency domain resource of the first frequency domain resource is 1, that is, the UE It can be determined that the spatial reception parameters of the DMRS and CSI-RS are correlated; it can be determined that the index of the TCI-state of the DMRS of the PDSCH transmitted on the first sub-frequency domain resource of the second frequency domain resource is 1, that is, the UE can determine the The spatial reception parameters of DMRS and
  • each r i in the above method is 1
  • the method is equivalent to the following method.
  • the base station indicates a first pattern from the F1 candidate first patterns, and the first pattern indicates the TCI-state of each DMRS from the first DMRS to the Nth DMRS. That is, the one first pattern is used to indicate N TCI-states, for example, to indicate the index of the N TCI-states, and the N TCI-states respectively correspond to the first DMRS to the Nth DMRS one-to-one. Similar to the foregoing example C, the TCI-state of the i-th DMRS indicates that the i-th DMRS and the i-th DMRS are at least one signal of QCL, and the i-th DMRS and the QCL type of each signal in the at least one signal are indicated.
  • F1 is an integer greater than or equal to 1.
  • Table 4 shows four candidate first patterns. It can be understood that the first pattern shown in Table 4 is only used as an example, and does not constitute a limitation to the embodiment of the present application. Assume that the TCI-state indicated in Table 4 is the TCI-state shown in Table 2.
  • FIG. 5 shows an example diagram of the candidate first pattern corresponding to Table 4.
  • the base station can use the Bit, configure the first pattern of the UE for the UE.
  • the binary value of the 2 bits is 10.
  • the UE can determine that the index of the TCI-state of the first DMRS is 1, and it can determine that the index of the TCI-state of the second DMRS is 2.
  • the UE can determine that the spatial reception parameters of the first DMRS and CSI-RS are correlated; it can be determined that the Doppler shift, Doppler spread, delay spread, and average delay of the second DMRS and TRS are correlated, and The spatial reception parameters of CSI-RS are correlated.
  • the F1 candidate first patterns may be predefined, or may be indicated by the base station for the UE through third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the second indication information may be RRC signaling, MAC CE, or DCI.
  • F1 is equal to 1, it is not necessary to pass a first pattern through the second indication information.
  • the pattern is considered to be a pattern configured by the base station for the UE.
  • the F1 candidate first patterns are predefined, and the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is a broadcast message or SIB
  • the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is RRC signaling
  • the second indication information is MAC CE or DCI.
  • the third indication information is MAC CE
  • the second indication information is DCI
  • the second indication information includes a TCI field, which is used by the base station to indicate the first pattern for the UE.
  • the second indication information and the first indication information are the same DCI.
  • the base station indicates the F1 candidate first pattern for the UE through the third indication information, and may directly indicate the specific configuration of the F1 candidate first pattern, or may indicate the activated F1 candidate first pattern from the F2 candidate first patterns.
  • the F2 candidate first patterns may be predefined, or indicated by the base station for the UE through fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the F2 candidate first patterns may be predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.
  • the fourth indication information is a broadcast message or SIB
  • the third indication information is RRC signaling.
  • the fourth indication information is a broadcast message, SIB or RRC signaling, and the third indication information is MAC CE.
  • the method for the base station to indicate the activated F1 candidate first patterns from the F2 candidate patterns through the fourth indication information is similar to the above-mentioned method for indicating M2 sets of QCL information from the M1 sets of candidate QCL information, which will not be repeated here.
  • the base station indicates a second pattern from P1 candidate second patterns, and the second pattern indicates the first pattern of a group of time units.
  • the group of time units includes multiple time units, and each time unit corresponds to a first pattern.
  • P1 is an integer greater than or equal to 1.
  • the time unit may be a symbol, a time slot, a subframe, a transmission time interval, or a radio frame.
  • the introduction of the first pattern is the same as the description of Example D, so I won't repeat it here.
  • the group of time units includes the first time unit.
  • the first time unit is used to transmit the PDSCH in the method shown in FIG. 1. Therefore, the UE can determine the first pattern corresponding to the first time unit in the second pattern according to a second pattern indicated by the base station and the first time unit used to transmit PDSCH, so as to determine the TCI- of each PDSCH. state.
  • the i-th frequency domain resource includes 2 sub-frequency domain resources, and each second pattern is used to indicate the first pattern on 3 time units.
  • Table 5 shows the 4 candidate second patterns. pattern. It can be understood that the second pattern shown in Table 5 is only used as an example, and does not constitute a limitation to the embodiment of the present application. Assume that the first pattern indicated in Table 5 is the first pattern shown in Table 3.
  • FIG. 6 shows an example diagram of the candidate second pattern corresponding to Table 5.
  • the base station can use the Bit, configure the second pattern of the UE for the UE.
  • the binary value of the 2 bits is 11.
  • the UE can determine that the index of the TCI-state of the DMRS of the PDSCH sent on the first frequency domain resource of the first frequency domain resource is 0 , That is, the UE can determine that the Doppler frequency shift, Doppler spread, delay spread, and average delay of the DMRS and TRS are correlated; it can determine that the frequency domain resource of the first frequency domain resource is transmitted on the second sub-frequency domain resource.
  • the index of the TCI-state of the DMRS of the PDSCH is 1, that is, the UE can determine that the DMRS and the spatial reception parameters of the CSI-RS are correlated; it can determine the DMRS of the PDSCH sent on the first sub-frequency domain resource of the second frequency domain resource.
  • the index of the TCI-state is 1, that is, the UE can determine that the spatial reception parameters of the DMRS and the CSI-RS are correlated; and, it can determine the DMRS of the PDSCH transmitted on the second frequency domain resource of the second frequency domain resource.
  • the index of TCI-state is 2, that is, the UE can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the DMRS and TRS are correlated with the spatial reception parameters of the CSI-RS Correlation.
  • the P1 candidate second pattern may be predefined, or may be indicated by the base station for the UE through third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the second indication information may be RRC signaling, MAC CE, or DCI.
  • P1 is equal to 1
  • P1 is equal to 1
  • the second pattern is considered to be the second pattern configured by the base station for the UE.
  • the P1 candidate second pattern may be predefined, and the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is a broadcast message or SIB
  • the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is RRC signaling
  • the second indication information is MAC CE or DCI.
  • the third indication information is MAC CE
  • the second indication information is DCI
  • the second indication information includes a TCI field, which is used by the base station to indicate the second pattern for the UE.
  • the second indication information and the first indication information are the same DCI.
  • the base station indicates the P1 candidate second pattern for the UE through the third indication information, and may directly indicate the specific configuration of the P1 candidate second pattern, or may indicate the activated P1 candidate second pattern from the P2 candidate second pattern.
  • the P2 candidate second patterns may be predefined, or may be indicated by the base station for the UE through fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the P2 candidate second patterns may be predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.
  • the fourth indication information is a broadcast message or SIB
  • the third indication information is RRC signaling.
  • the fourth indication information is a broadcast message, SIB or RRC signaling, and the third indication information is MAC CE.
  • the method for the base station to indicate the activated P1 candidate second pattern from the P2 candidate second patterns through the fourth indication information is similar to the above-mentioned method for indicating the M2 set of QCL information from the M1 set of candidate QCL information, which will not be repeated here.
  • the base station indicates Z2 third patterns from Z1 candidate third patterns.
  • the third pattern corresponds to a TCI-state
  • the third pattern is used to indicate Elements
  • the The elements in sequence (for example, from high frequency to low frequency, or from low frequency to high frequency) correspond one-to-one to the first frequency domain resource to the Nth frequency domain resource Sub-resources.
  • the value of the element when the value of the element is t1, it means that the TCI-state corresponding to the third pattern is enabled on the sub-resource corresponding to the element.
  • the value of the element is not t1 or t2
  • t1 and t2 are integers, for example, t1 is 1, and t2 is 0.
  • Elements can include Bitmap of bits, Cells, Information bits, etc., are not limited in the embodiment of this application.
  • r i is the number of sub-frequency domain resources included in the i-th frequency domain resource.
  • the r i of different frequency domain resources can be the same or different, r i is an integer greater than or equal to 1, the value of i is 1 to N, and N is an integer greater than or equal to 2.
  • the r i of each frequency domain resource from the 1st frequency domain resource to the Nth frequency domain resource is 1. At this time, similar to the above example D, it can be considered that there is no need to distinguish the frequency domain resources in the frequency domain resources. Domain resources.
  • the method for indicating Z2 third patterns from Z3 candidate third patterns is similar to the above-mentioned method for indicating M2 sets of QCL information from M1 sets of candidate QCL information, which will not be repeated here.
  • the base station indicates the Z2 third patterns that can be used by the UE through the indicated Z2 third patterns.
  • the third pattern A for the third pattern A indicated
  • the value of this element is t1
  • the value of this element is not When it is t1 or t2, it means that the TC-state of the DMRS of the PDSCH transmitted on the sub-resource corresponding to the element does not include the TCI-state corresponding to the third pattern.
  • priority can be configured for the Z3 TCI-states corresponding to the Z1 candidate third pattern or the Z4 TCI-states corresponding to the Z2 third pattern.
  • the frequency domain resource is enabled, and the TCI-state with high priority is determined to be the TC-state of the DMRS of the PDSCH of the UE transmitted on the sub-frequency domain resource.
  • Z3 is less than or equal to Z1
  • Z4 is less than or equal to Z2.
  • the configured priority of each TCI-state may be predefined, or may be indicated by the base station for the UE through signaling, which is not limited in the embodiment of the present application.
  • Table 6 shows 4 candidate third patterns, assuming N is 2, each frequency domain resource includes 4 sub-frequency domain resources, and the TCI-state indicated in Table 6 is the TCI-state shown in Table 2.
  • FIG. 7 shows an example diagram of the candidate third pattern corresponding to Table 6.
  • the base station may indicate the indexes of two third patterns through the second indication information, and the values of the two indexes are 0 and 1, respectively.
  • the UE can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the first to fourth sub-frequency resources of the first frequency domain resource is 1, and the indexes of the first to the second frequency domain resources are 1
  • the index of the TCI-state of the DMRS of the PDSCH transmitted on the fourth sub-frequency domain resource is 0.
  • the base station may indicate 3 indexes through the second indication information, and the values of the 3 indexes are 0, 1, and 2, respectively.
  • the priority of the TCI-state with index 2 is higher than the priority of the TCI-state with indexes 0 and 1.
  • the UE can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the first and second sub-frequency resources of the first frequency domain resource is 1, the third and the third of the first frequency domain resource.
  • the index of the TCI-state of the DMRS of the PDSCH transmitted on the 4 frequency domain resources is 2, and the index of the TCI-state of the DMRS of the PDSCH transmitted on the first and second frequency domain resources of the second frequency domain resource is 0, And the index of the TCI-state of the DMRS of the PDSCH transmitted on the third and fourth sub-frequency resources of the second frequency domain resource is 2.
  • the Z1 candidate third patterns may be predefined, or may be indicated by the base station for the UE through third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the second indication information may be RRC signaling, MAC CE, or DCI.
  • a third pattern may not be passed through the second indication information. At this time, the third pattern is considered to be the third pattern configured by the base station for the UE.
  • the Z1 candidate third patterns may be predefined, and the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is a broadcast message or SIB
  • the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is RRC signaling
  • the second indication information is MAC CE or DCI.
  • the third indication information is MAC CE
  • the second indication information is DCI
  • the second indication information includes a TCI field, which is used by the base station to indicate the third pattern for the UE.
  • the second indication information and the first indication information are the same DCI.
  • the base station indicates the Z1 candidate third pattern for the UE through the third indication information, and may directly indicate the specific configuration of the Z1 candidate third pattern, or may indicate the activated Z1 candidate third pattern from the Z3 candidate third patterns.
  • the Z3 candidate third patterns may be predefined, or indicated by the base station for the UE through fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the Z3 candidate third patterns may be predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.
  • the fourth indication information is a broadcast message or SIB
  • the third indication information is RRC signaling.
  • the fourth indication information is a broadcast message, SIB or RRC signaling, and the third indication information is MAC CE.
  • the method in which the base station indicates the activated Z1 candidate first patterns from the Z3 candidate third patterns through the fourth indication information is similar to the above-mentioned method of indicating M2 sets of QCL information from the M1 sets of candidate QCL information, which will not be repeated here.
  • the base station indicates X2 fourth patterns from X1 candidate fourth patterns, and each fourth pattern indicates a third pattern of a group of time units.
  • the introduction of a group of time units is the same as that of the above example E, and the introduction of the third pattern is the same as that of the example F, and will not be repeated here.
  • the group of time units includes the first time unit.
  • the first time unit is used to transmit the PDSCH in the method shown in FIG. 1. Therefore, the UE can determine the X2 third patterns corresponding to the first time unit in the X2 fourth patterns according to the X2 fourth patterns indicated by the base station and the first time unit for transmitting PDSCH, which can be similar to the above example F, determine the TCI-state of each PDSCH.
  • each frequency domain resource includes 4 sub-frequency domain resources, and each fourth pattern is used to indicate the third pattern on 3 time units.
  • Table 7 shows 4 kinds of candidate fourth patterns. pattern. It can be understood that the fourth pattern shown in Table 7 is only used as an example, and does not constitute a limitation to the embodiment of the present application. Assume that the third pattern indicated in Table 7 is the third pattern shown in Table 6.
  • FIG. 8 shows an example diagram of the candidate fourth pattern corresponding to Table 7.
  • the base station may indicate the indexes of the two fourth patterns for the UE through the second indication information, assuming that the indicated two indexes are 1 and 2, or the bitmap indicated for the UE is 0110 (assuming that the fourth pattern corresponds to the fourth pattern from low to high). Pattern 0 to Pattern 4 3).
  • the UE can determine the TCI-state of the DMRS of the PDSCH transmitted on the first to fourth sub-frequency resources of the first frequency domain resource.
  • the index is 1, and the index of the TCI-state of the DMRS of the PDSCH transmitted on the first to fourth sub-frequency domain resources of the second frequency domain resource is 0.
  • the X1 candidate fourth patterns may be predefined, or may be indicated by the base station for the UE through third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the second indication information may be RRC signaling, MAC CE, or DCI.
  • X1 is equal to 1
  • the fourth pattern is considered to be the fourth pattern configured by the base station for the UE.
  • the X1 candidate fourth patterns may be predefined, and the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is a broadcast message or SIB
  • the second indication information is RRC signaling, MAC CE, or DCI.
  • the third indication information is RRC signaling
  • the second indication information is MAC CE or DCI.
  • the third indication information is MAC CE
  • the second indication information is DCI
  • the second indication information includes a TCI field, which is used by the base station to indicate the fourth pattern for the UE.
  • the second indication information and the first indication information are the same DCI.
  • the base station indicates the X1 candidate fourth pattern for the UE through the third indication information, and may directly indicate the specific configuration of the X1 candidate fourth pattern, or may indicate the activated X1 candidate fourth pattern from the X3 candidate fourth patterns.
  • the X3 candidate fourth patterns may be predefined, or indicated by the base station for the UE through fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).
  • the X3 candidate fourth patterns may be predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.
  • the fourth indication information is a broadcast message or SIB
  • the third indication information is RRC signaling.
  • the fourth indication information is a broadcast message, SIB or RRC signaling, and the third indication information is MAC CE.
  • the method for the base station to indicate the activated X1 candidate fourth patterns from the X3 candidate fourth patterns through the fourth indication information is similar to the above-mentioned method of indicating M2 sets of QCL information from the M1 sets of candidate QCL information, which will not be repeated here.
  • FIG. 9 shows an example flow chart of data transmission between the base station and the UE.
  • the base station sends a downlink signal to the UE. For example, sending SSB and/or CSI-RS.
  • S902 The UE performs channel estimation or channel measurement on the downlink signal received in S901, and feeds back the measurement result to the base station.
  • S903 The UE sends a sounding reference signal (sounding reference symbol, SRS) to the base station.
  • SRS sounding reference symbol
  • the base station determines, according to the measurement information reported by the UE in S902 and/or the channel measurement information obtained according to the SRS received in S403, multiple beams used to send PDSCH to the UE and frequency domain resources corresponding to the multiple beams , Antenna port collection, and QCL information.
  • the base station sends PDCCH and PDSCH to the UE.
  • the PDCCH carries DCI, and the DCI is used to implement the above-mentioned functions of the first indication information and the second indication information.
  • the DCI can indicate the following information of the first PDSCH to the Nth PDSCH: the first frequency domain resource to the Nth frequency domain resource, the first antenna port set to the Nth antenna port set, the first PDSCH to the Nth PDSCH DMRS QCL information.
  • the UE receives the PDSCH according to the indication of the DCI carried on the PDCCH.
  • the UE determines the following information of the first PDSCH to the Nth PDSCH for carrying N repetitive data according to the instructions of the DCI: the first frequency domain resource to the Nth frequency domain resource, the first antenna port set to the Nth antenna port set, QCL information of the DMRS from the 1st PDSCH to the Nth PDSCH. According to this information, the UE can receive the first PDSCH to the Nth PDSCH. As long as data is successfully received on at least one PDSCH from the first PDSCH to the Nth PDSCH, successful data transmission between the base station and the UE can be realized.
  • the methods provided in the embodiments of the present application are introduced from the perspective of network equipment (such as base station), terminal equipment (such as UE), and the interaction between network equipment and terminal equipment.
  • the network device and the terminal may include a hardware structure and/or software module, and the above functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function among the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • FIG. 10 shows a structural example diagram of an apparatus 300 provided by an embodiment of the application.
  • the apparatus 300 is used to implement the function of the terminal device in the foregoing method.
  • the device may be a terminal device or another device capable of realizing the function of the terminal device.
  • the other device can be installed in the terminal device or can be matched and used with the terminal device.
  • the device 300 includes a receiving module 301 for receiving signals or information. For example, it is used to receive one or more of the following signals from the network device: first indication information, second indication information, PDSCH and PDSCH DMRS.
  • the device 300 includes a sending module 302 for sending signals or information. For example, it is used to send SRS to network equipment.
  • the device 300 includes a processing module 303 for processing the received signal or information, for example, for decoding the signal or information received by the receiving module 301.
  • the processing module 303 may also generate a signal or information to be sent, for example, for generating a signal or information to be sent through the sending module 302.
  • the division of modules in the embodiments of the present application is illustrative, and is a logical function division, and there may be other division methods in actual implementation.
  • the receiving module 301 and the sending module 302 can also be integrated as a transceiver module or a communication module.
  • the functional modules in the various embodiments of the present application may be integrated into one module, or may exist alone physically, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules.
  • the apparatus 300 is used to implement the function of the network device in the foregoing method.
  • the device may be a network device or other devices that can realize the functions of the network device.
  • the other device can be installed in the network equipment or can be matched and used with the network equipment.
  • the device 300 includes a receiving module 301 for receiving signals or information. For example, it is used to receive SRS from a terminal device.
  • the device 300 includes a sending module 302 for sending signals or information. For example, it is used to send one or more of the following signals to the terminal device: first indication information, second indication information, PDSCH and PDSCH DMRS.
  • the device 300 includes a processing module 303 for processing the received signal or information, for example, for decoding the signal or information received by the receiving module 301.
  • the processing module 303 may also generate a signal or information to be sent, for example, for generating a signal or information to be sent through the sending module 302.
  • FIG. 11 shows an apparatus 400 provided by an embodiment of this application.
  • the apparatus 400 is used to implement the function of the terminal device in the foregoing method, and the apparatus may be a terminal device, or may be another apparatus capable of realizing the function of the terminal device.
  • the other device can be installed in the terminal device or can be matched and used with the terminal device.
  • the device 400 may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 400 includes at least one processor 420, configured to implement the function of the terminal device in the method provided in the embodiment of the present application.
  • the processor 420 may generate and send signals such as SRS, and may be used to receive and process one or more of the following signals: first indication information, second indication information, PDSCH and PDSCH DMRS, see method for details The detailed description in the example will not be repeated here.
  • the device 400 may also include at least one memory 430 for storing program instructions and/or data.
  • the memory 430 and the processor 420 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 420 may cooperate with the memory 430.
  • the processor 420 may execute program instructions stored in the memory 430. At least one of the at least one memory may be included in the processor 420.
  • the apparatus 400 may further include a communication interface 410 for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 400 can communicate with other devices.
  • the other device may be a network device.
  • the processor 420 uses the communication interface 410 to send and receive signals, and is used to implement the functions of the terminal device described in the foregoing method embodiments.
  • the apparatus 400 is used to implement the function of the network device in the foregoing method.
  • the apparatus may be a network device, or may be another apparatus capable of implementing the function of the network device.
  • the other device can be installed in the network equipment or can be matched and used with the network equipment.
  • the device 400 may be a chip system.
  • the apparatus 400 includes at least one processor 420, configured to implement the function of the network device in the method provided in the embodiment of the present application.
  • the processor 420 may receive and process signals such as SRS, and may be used to generate and send one or more of the following signals: first indication information, second indication information, PDSCH and PDSCH DMRS, see method for details The detailed description in the example will not be repeated here.
  • the device 400 may also include at least one memory 430 for storing program instructions and/or data.
  • the memory 430 and the processor 420 are coupled.
  • the processor 420 may cooperate with the memory 430.
  • the processor 420 may execute program instructions stored in the memory 430. At least one of the at least one memory may be included in the processor 420.
  • the apparatus 400 may further include a communication interface 410 for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 400 can communicate with other devices.
  • the other device may be a terminal device.
  • the processor 420 uses the communication interface 410 to send and receive signals, and is used to implement the functions of the network device described in the foregoing method embodiments.
  • the specific connection medium between the above-mentioned communication interface 410, the processor 420, and the memory 430 is not limited in the embodiment of the present application.
  • the memory 430, the processor 420, and the transceiver 410 are connected by a bus 440 in FIG. 11, and the bus is represented by a thick line in FIG. , Is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used to represent in FIG. 11, but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may implement or Perform the methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random-access memory (random-access memory, RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function for storing program instructions and/or data.
  • the technical solutions provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium.
  • the embodiments can be mutually cited.
  • the methods and/or terms between the method embodiments can be mutually cited, such as the functions and/or functions between the device embodiments.
  • Or terms may refer to each other, for example, functions and/or terms between the device embodiment and the method embodiment may refer to each other.

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

Abstract

Les modes de réalisation de l'invention concernent un procédé et un appareil de transmission répétée de données. Le procédé peut utiliser N faisceaux pour effectuer N transmissions répétées de données, N étant un nombre entier supérieur ou égal à 2. Le procédé comprend les étapes suivantes : un dispositif réseau envoie, à un dispositif terminal, des premières informations d'indication utilisées pour indiquer un i-ième ensemble de ports d'antenne et une i-ième ressource de domaine fréquentiel d'un i-ème canal de données partagé de liaison descendante (PDSCH), l'i-ième ensemble de ports d'antenne comprenant un ou plusieurs ports d'antenne ; et le dispositif terminal utilise l'i-ième ensemble de ports d'antenne pour recevoir l'i-ième PDSCH du dispositif réseau sur l'i-ième ressource de domaine fréquentiel, l'i-ième PDSCH comportant i-ième données répétées, et la valeur d'i étant de 1 à N.
PCT/CN2021/091948 2020-05-09 2021-05-06 Procédé de transmission répétée de données WO2021227928A1 (fr)

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WO2020007293A1 (fr) * 2018-07-05 2020-01-09 Huawei Technologies Co., Ltd. Procédé et système pour améliorer la fiabilité d'un canal de données à l'aide de multiples points de transmission et de réception
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