WO2021159258A1 - 一种数据传输方法及装置 - Google Patents

一种数据传输方法及装置 Download PDF

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Publication number
WO2021159258A1
WO2021159258A1 PCT/CN2020/074670 CN2020074670W WO2021159258A1 WO 2021159258 A1 WO2021159258 A1 WO 2021159258A1 CN 2020074670 W CN2020074670 W CN 2020074670W WO 2021159258 A1 WO2021159258 A1 WO 2021159258A1
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WIPO (PCT)
Prior art keywords
quasi
reference signals
frequency offset
doppler frequency
location information
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PCT/CN2020/074670
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English (en)
French (fr)
Inventor
李翔
戴喜增
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/074670 priority Critical patent/WO2021159258A1/zh
Priority to CN202080095872.4A priority patent/CN115039350A/zh
Priority to JP2022548548A priority patent/JP2023513291A/ja
Priority to EP20918264.1A priority patent/EP4092925A4/en
Publication of WO2021159258A1 publication Critical patent/WO2021159258A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0222—Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

Definitions

  • This application relates to the field of communication technology, and in particular to a data transmission method and device.
  • a single-frequency network can be connected to a baseband unit (BBU) through multiple remote radio heads (RRH)-s.
  • RRH-s uses the same cell ID (Cell ID), all RRHs connected to a BBU jointly send data to a UE, and the UE will receive a common reference signal (cell-specific reference signal, CRS) from multiple RRHs at the same time Reference signal.
  • CRS cell-specific reference signal
  • all RRHs connected to a BBU jointly send data to a UE, and the UE will receive the same CRS from multiple RRHs at the same time.
  • all CRSs sent by RRH-s connected to a BBU occupy the same fixed position time-frequency Resources, the CRS sent by these RRHs will form multipath signals when they arrive at the UE, which will cause Doppler spreading problems, resulting in the UE's downlink synchronization not being able to determine the center frequency well, thereby reducing the accuracy of received data.
  • This application provides a data transmission method and device, chip, computer readable storage medium, computer program product, etc., which can improve the accuracy of data transmission.
  • an embodiment of the present application provides a data transmission method, which may be applied to a terminal device, or a chip or chipset in a terminal device, and the method includes: receiving an indication message, the indication information being used to indicate The quasi co-location information of the control channel or the data channel, where the quasi co-location information indicates that the control channel or the data channel has a quasi co-location relationship with multiple reference signals.
  • the quasi-co-location information is associated with multiple reference signals, that is, the data channel (or control channel) has a quasi-co-location relationship with multiple reference signals, so that the terminal device can be in the presence of multipath signals.
  • Estimating more accurate channel information and Doppler frequency offset based on multiple reference signals can improve the accuracy of channel estimation, such as the accuracy of the time domain difference of channel estimation, so as to improve the performance of reception.
  • the multiple reference signals may be evaluated according to the quasi co-location information.
  • Doppler frequency offset estimation is performed respectively to obtain Doppler frequency offset estimation results corresponding to the multiple reference signals; and Doppler frequency offset estimation results corresponding to the multiple reference signals are combined to obtain the integrated multiple frequency offset estimation results. Puller frequency offset estimation result.
  • the indication information may include a piece of configuration information indicating the quasi co-location information, the configuration information includes a reference signal list, and the reference signal list includes the identities of the multiple reference signals .
  • the identities of multiple reference signals can be carried in the reference signal list of the configuration information, so that the data channel (or control channel) has a quasi co-location relationship with the multiple reference signals.
  • the indication information includes a plurality of configuration information indicating the quasi co-location information, wherein the plurality of configuration information is associated with the plurality of reference signals one by one.
  • the data channel or control channel has a quasi co-location relationship with multiple reference signals.
  • the multiple reference signals may include at least one of the following: a tracking reference signal (CSI-RS for tracking, TRS), and a synchronization signal broadcast channel block (synchronisation signal/PBCH block, SSB).
  • CSI-RS for tracking
  • TRS tracking reference signal
  • SSB synchronization signal broadcast channel block
  • an embodiment of the present application provides a data transmission method, which can be applied to a network device, or a chip or chipset in a network device, and the method includes: sending an indication message, the indication information being used to indicate The quasi co-location information of the control channel or the data channel, the quasi co-location information indicates that the multiple reference signals of the control channel or the data channel have a quasi co-location relationship; and the control channel or data is sent to the terminal device according to the quasi co-location information channel.
  • the quasi-co-location information is associated with multiple reference signals, that is, the data channel (or control channel) has a quasi-co-location relationship with multiple reference signals, so that the terminal device can be in the presence of multipath signals.
  • Estimating more accurate channel information and Doppler frequency offset based on multiple reference signals can improve the accuracy of channel estimation, such as the accuracy of the time domain difference of channel estimation, so as to improve the performance of reception.
  • the configuration information of the quasi co-location information includes a reference signal list, and the reference signal list includes identities of the multiple reference signals.
  • the identities of multiple reference signals can be carried in the reference signal list of the configuration information, so that the data channel (or control channel) has a quasi co-location relationship with the multiple reference signals.
  • the indication information includes a plurality of configuration information indicating the quasi co-location information, wherein the plurality of configuration information is associated with the plurality of reference signals one by one.
  • the data channel or control channel has a quasi-co-location relationship with multiple reference signals.
  • the multiple reference signals may include at least one of the following: TRS and SSB.
  • an embodiment of the present application provides a data transmission method, which can be applied to a terminal device, or a chip or a chip set in a terminal device, and the method includes: receiving first information, where the first information is used for Activate a TCI state, which is associated with a TRS resource.
  • Receive a TRS from a first remote radio head RRH where the first RRH is an RRH currently providing service among multiple RRHs connected to the same baseband processing unit BBU, and the TRS is a TRS corresponding to the TRS resource. At least one of the following is performed based on the TRS: channel estimation and Doppler frequency offset estimation.
  • the terminal device only needs to track one TCI state at a time, that is, only one set of TCI state is activated for the terminal device, which can reduce the implementation complexity.
  • second information from the first RRH is received, and the second information is used to indicate the handover from the first RRH to the second RRH; and the handover from the first RRH to the The second RRH.
  • the method before receiving the second information from the first RRH, the method further includes: performing signal quality measurements on the reference signals sent by the multiple RRHs respectively, to obtain the corresponding information of the multiple RRHs. Measurement value; report the measurement values respectively corresponding to the multiple RRHs to the first RRH.
  • the method before switching from the first RRH to the second RRH, the method further includes: performing at least one of the following based on the TRS: channel estimation and Doppler frequency offset estimation results , Receiving data from the first RRH.
  • an embodiment of the present application provides a data transmission method, which can be applied to a terminal device, or a chip or chipset in a terminal device, and the method includes: receiving first information, where the first information is used for Activate the first TCI state and the second TCI state; receive the first TRS from the first RRH and the second TRS from the second RRH, the first RRH is currently provided by multiple RRHs connected to the same baseband processing unit BBU
  • the first TRS is the TRS corresponding to the first TCI state
  • the second TRS is the TRS corresponding to the second TCI state; at least one of the following is performed based on the first TRS: channel estimation , Doppler frequency offset estimation, or, after switching from the first RRH to the second RRH, perform at least one of the following based on the second TRS: channel estimation and Doppler frequency offset estimation.
  • the data channel and the control channel may use the same TCI state or different TCI states. If the data channel and the control channel use the same TCI state, the MAC-CE can be used to indicate the newly switched TCI state of the control channel. This TCI state can be applied to the data channel and the control channel. In this implementation, two sets of associations can be configured TRS of different TCI states. If the data channel and the control channel use different TCI states, the TCI state of the control channel can be unchanged, and the TCI state of the data channel is dynamically indicated by the DCI according to the specific RRH that provides the service.
  • the terminal device can obtain accurate Doppler frequency offset information according to different TCI states, thereby avoiding the Doppler expansion problem caused by multipath, and then more accurately estimating and correcting Doppler Leak frequency offset enables the UE to lock the beams for sending and receiving data more accurately during high-speed movement, and improve the receiving performance.
  • the terminal device in the third embodiment above simultaneously tracks two or more TCI states, so that when the terminal device switches the TCI state, the time for activating the new TCI state can be saved, so that the interruption of data transmission can be avoided to a certain extent.
  • the method before the first RRH is handed over to the second RRH, the method further includes: receiving second information from the first RRH, where the second information is used to indicate Handover from the first RRH to the second RRH.
  • the method before receiving the second information from the first RRH, the method further includes: performing signal quality measurements on the reference signals sent by the multiple RRHs respectively, to obtain the corresponding information of the multiple RRHs. Measurement value; report the measurement values respectively corresponding to the multiple RRHs to the first RRH.
  • the method further includes: performing at least one of the following based on the first TRS: channel estimation , The result obtained by Doppler frequency offset estimation, receiving the data from the first RRH.
  • the second TRS after performing at least one of the following based on the second TRS: channel estimation and Doppler frequency offset estimation, it further includes: performing at least one of the following based on the second TRS: channel estimation , The result of Doppler frequency offset estimation, receiving data from the second RRH.
  • the present application provides a data transmission device, which may be a communication device, or a chip or chipset in the communication device, where the communication device may be a terminal device or a network device.
  • the device may include a processing module and a transceiver module.
  • the processing module may be a processor, and the transceiver module may be a transceiver; the device may also include a storage module, and the storage module may be a memory; the storage module is used to store instructions, and the processing module Execute the instructions stored in the storage module to enable the terminal device to perform the corresponding functions in the first aspect or the third aspect or the fourth aspect, or the processing module executes the instructions stored in the storage module to enable the network device to execute Corresponding functions in the second aspect above.
  • the processing module may be a processor or a processing circuit, the transceiver module may be an input/output interface, a pin or a circuit, etc.; the processing module executes what is stored in the storage module Instructions to make the terminal device perform the corresponding function in the first aspect or the third aspect or the fourth aspect, or the processing module executes the instruction stored in the storage module to make the network device perform the corresponding function in the second aspect .
  • the storage module can be a storage module (for example, register, cache, etc.) in the chip or chipset, or a storage module (for example, read-only memory, random access memory, etc.) located outside the chip or chipset in the base station. Memory, etc.).
  • a data transmission device which includes a processor, a communication interface, and a memory.
  • the communication interface is used to transmit information, and/or messages, and/or data between the device and other devices.
  • the memory is used to store computer-executable instructions.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes any design or second aspect of the first aspect or the first aspect described above. Or the method described in any design of the second aspect, any design of the third aspect or the third aspect, or any design of the fourth aspect or the fourth aspect.
  • a computer storage medium provided by an embodiment of the present application.
  • the computer storage medium stores program instructions.
  • the communication device executes the first aspect of the embodiments of the present application and any one thereof. Possible designs, the second aspect and any of its possible designs, the third aspect or any design of the third aspect, the fourth aspect or the method of any design of the fourth aspect.
  • a computer program product provided by an embodiment of the present application, when the computer program product runs on a communication device, causes the communication device to be the first aspect and any possible design, the second aspect and the second aspect of the embodiment of the present application. Any possible design, any design of the third aspect or the third aspect, the fourth aspect or any design method of the fourth aspect.
  • the ninth aspect is a chip provided by an embodiment of the present application, which is coupled with a memory, and executes the first aspect and any possible design, the second aspect and any possible design, and the third aspect of the embodiments of the present application. Aspect or any one of the design of the third aspect, the fourth aspect or the method of any one of the fourth aspect.
  • an embodiment of the present application provides a chip, including a communication interface and at least one processor, the communication interface is used to output and/or input signals, or to receive computer program codes or instructions and transmit them to the processing
  • the processor runs computer program code to execute the method described in the first aspect or any one of the first aspect, the second aspect, and any possible design of the embodiments of the present application.
  • Coupled in the embodiments of the present application means that two components are directly or indirectly combined with each other.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic diagram of data transmission in an SFN networking provided by an embodiment of the application
  • FIG. 3 is a flowchart of a data transmission method provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a data transmission process provided by an embodiment of this application.
  • FIG. 5 is a schematic diagram of another data transmission process provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram of another data transmission process provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of another data transmission process provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a data transmission device provided by an embodiment of the application.
  • FIG. 9 is a schematic structural diagram of a data transmission device provided by an embodiment of this application.
  • QCL Quasi co-location
  • Quasi co-location can also be referred to as quasi co-location or co-location.
  • the signals corresponding to the antenna ports with the QCL relationship may have the same or similar spatial characteristic parameters (or called parameters), or the spatial characteristic parameters (or called parameters) of an antenna port may be used to determine the relationship with the antenna
  • the spatial characteristic parameter (or called the parameter) difference is smaller than a certain threshold.
  • the spatial characteristic parameters of two reference signals or channels satisfying the QCL relationship are the same (or similar or similar), so that the spatial characteristic parameters of the target reference signal can be inferred based on the source reference signal resource index.
  • the spatial characteristics of the two reference signals or channels that satisfy the spatial correlation information are the same (or similar or similar), so that the spatial characteristics of the target reference signal can be inferred based on the source reference signal resource index parameter.
  • the spatial characteristic parameters include one or more of the following parameters:
  • Angle of incidence AoA
  • dominant (dominant) incident angle AoA average incident angle
  • power angular spectrum PAS
  • exit angle angle of departure, AoD
  • main exit angle Average exit angle, power angle spectrum of exit angle
  • terminal device transmit beamforming terminal device receive beamforming, spatial channel correlation, network device transmit beamforming, network device receive beamforming, average channel gain, average channel delay (average delay), delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (doppler shift), spatial reception parameters (spatial Rx parameters), etc.
  • angles may be decomposition values of different dimensions, or a combination of decomposition values of different dimensions.
  • Network equipment can configure one or more types of QCL for terminal equipment at the same time, such as QCL type A+D, C+D:
  • QCL type A Doppler shift, Doppler spread, average delay, delay spread
  • QCL type B Doppler shift, Doppler spread
  • QCL type A can also be referred to as type A
  • QCL-type A QCL-type A
  • Type A etc.
  • other types of QCLs are similar and are not specifically limited here.
  • QCL type A is collectively referred to as type A
  • QCL type B is collectively referred to as type B
  • QCL type C is collectively referred to as type C
  • QCL type D is collectively referred to as type D.
  • the QCL relationship When the QCL relationship is a QCL relationship of type D, it can be considered as an airspace QCL.
  • the antenna port meets the spatial QCL relationship it can be the QCL relationship between the downlink signal port and the downlink signal port, or the QCL relationship between the uplink signal port and the uplink signal port (also called spatial relation), which can be two
  • the two signals have the same AoA or AoD, which is used to indicate that they have the same receiving beam or transmitting beam.
  • the AoA and AoD of the two signals may have a corresponding relationship, or the AoD and AoA of the two signals may have a corresponding relationship, that is, the beam can be used Reciprocity
  • the uplink transmit beam is determined according to the downlink receive beam
  • the downlink receive beam is determined according to the uplink transmit beam.
  • the signal transmitted on the port with the spatial QCL relationship can also be understood as using the same spatial filter to receive or transmit the signal.
  • the spatial filter may be at least one of the following: precoding, weight of the antenna port, phase deflection of the antenna port, and amplitude gain of the antenna port.
  • the signal transmitted on the port with the spatial QCL relationship can also be understood as having a corresponding beam pair link (BPL), and the corresponding BPL includes at least one of the following: the same downlink BPL, the same uplink BPL, and the downlink BPL The corresponding uplink BPL, the downlink BPL corresponding to the uplink BPL.
  • BPL beam pair link
  • the spatial reception parameter (ie, QCL of type D) can be understood as a parameter for indicating the direction information of the reception beam.
  • scenario applicable to the QCL hypothesis in this application may also be two reference signals, or further or an association relationship between transmission objects.
  • TCI Transmission configuration indication
  • TCI is used to indicate the QCL information of a signal or channel.
  • the channel can be a physical downlink control channel (PDCCH)/control resource set (CORESET) or a physical downlink shared channel (PDSCH).
  • the signal can be channel state information reference signal (CSI-RS), demodulation reference signal (DMRS), TRS, synchronization signal broadcast channel block (synchronisation signal/PBCH block, SS/PBCH block) )Wait.
  • TCI information means that the reference signal included in the TCI meets the QCL relationship with the channel or signal. It is mainly used to indicate that when the signal or channel is received, its spatial characteristic parameters and other information are the same as the spatial characteristic parameters of the reference signal included in the TCI. Similar or similar.
  • a TCI state can be configured with one or more reference signals that are referenced, and the associated QCL type (QCL type).
  • QCL types can be divided into four categories: A/B/C/D, which are different combinations or choices of ⁇ Doppler shift, Doppler spread, average delay, delay spread, and spatial Rx parameter ⁇ .
  • the TCI status includes QCL information, or the TCI status is used to indicate QCL information.
  • the configuration information of TCI state can be as follows:
  • qcl-Type1 is the first QCL information
  • qcl-Type2 is the second QCL information
  • QCL-Info is the specific content corresponding to qcl-Type
  • referenceSignal is a reference signal that satisfies the QCL relationship
  • qcl-Type is specific QCL types, such as typeA, typeB, typeC, typeD, etc.
  • SS/PBCH block can also be called SSB.
  • PBCH is the abbreviation of physical broadcast channel.
  • the SSB includes at least one of a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a PBCH. It is mainly used for cell search, cell synchronization, and signals that carry broadcast information.
  • the data transmission method provided in this application can be applied to various communication systems, for example, the Internet of Things (IoT), the narrowband Internet of Things (NB-IoT), LTE, or
  • the fifth-generation (5G) communication system can also be a hybrid architecture of LTE and 5G, or a 5G NR system, and new communication systems that will appear in the development of future communication.
  • the 5G communication system described in this application may include at least one of a non-standalone (NSA) 5G communication system and a standalone (SA) 5G communication system.
  • the communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, or other networks.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • Fig. 1 shows a communication system 100 to which an embodiment of the present application is applied.
  • the communication system 100 may include a network device 110, a network device 120, and a terminal device 130.
  • the above-mentioned communication system to which the embodiment of the application is applied is only an example, and the communication system to which the embodiment of the application is applied is not limited to this.
  • the number of network devices and terminal devices included in the communication system may also be other numbers, or a single number may be used.
  • Base station multi-carrier aggregation scenario, dual connection scenario or D2D communication scenario, coordinated multi-point transmission (CoMP) scenario.
  • the CoMP can be one or more scenarios of non-coherent joint transmission (NCJT), coherent joint transmission (CJT), and joint transmission (JT).
  • NCJT non-coherent joint transmission
  • CJT coherent joint transmission
  • JT joint transmission
  • the terminal device involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals.
  • the terminal device may be a device that provides users with voice and data connectivity, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and so on.
  • the terminal device can also be another processing device connected to the wireless modem.
  • the terminal device can communicate with one or more core networks through a radio access network (RAN).
  • Terminal devices can also be called wireless terminals, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, and access points , Remote terminal, access terminal, user terminal, user agent, user device, or user equipment, etc.
  • the terminal device can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal.
  • the access network exchanges language and data.
  • the terminal device may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), and other equipment.
  • Common terminal devices include, for example, mobile phones, tablet computers, notebook computers, handheld computers, mobile internet devices (MID), wearable devices, such as smart watches, smart bracelets, pedometers, etc., but this application is implemented Examples are not limited to this.
  • the terminal device involved in the embodiment of the present application may also be a terminal device that appears in the future evolved PLMN, etc., which is not limited in the embodiment of the present application.
  • the terminal device can also be a terminal device in the IoT system.
  • IoT is an important part of the development of information technology in the future. Its main technical feature is to connect objects to the network through communication technology to realize man-machine Interconnection, an intelligent network of interconnection of things.
  • the IoT technology can achieve massive connections, deep coverage, and power saving of the terminal through, for example, narrowband (NB) technology.
  • NB narrowband
  • the terminal equipment may also include sensors such as smart printers, train detectors, gas stations, etc.
  • the main functions include collecting data (part of the terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves. , To transmit uplink data to network equipment.
  • the network device involved in the embodiment of the present application is an entity on the network side for transmitting or receiving signals.
  • the network device in the embodiment of the present application may be a device in a wireless network, for example, a RAN node that connects a terminal to the wireless network.
  • the network equipment can be an evolved Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), or a gNode B (gNB) in a 5G system.
  • eNB evolved Node B
  • NR controller new radio controller
  • gNB gNode B
  • DU distributed unit , which may be a home base station, may be a transmission reception point (TRP) or a transmission point (TP) or any other wireless access device, but the embodiment of the application is not limited thereto.
  • Network equipment can cover one or more cells.
  • the single frequency network can achieve signal coverage within a certain range at the same time and at the same frequency, reducing the number of UE handovers.
  • LTE Long Term Evolution
  • a single-frequency network can be connected to one BBU through multiple RRH-s.
  • the multiple RRH-s use the same Cell ID. All RRHs connected to one BBU jointly send data to one UE. .
  • All RRHs connected to a BBU in LTE jointly send data to a UE.
  • the UE will receive reference signals from multiple RRHs at the same time, and perform channel estimation and time-frequency tracking based on the reference signals of the multiple RRHs.
  • LTE uses CRS as a downlink reference signal.
  • CRS is cell-level, that is, all UEs in a cell receive the same CRS for channel estimation and time-frequency tracking. Therefore, all RRHs connected to a BBU in LTE jointly send data to a UE, and the UE will receive the same reference signal from multiple RRHs at the same time.
  • the terminal equipment is on the high-speed rail.
  • RRHs are deployed along the high-speed rail. They are RRH0 ⁇ RRH3. RRH0 ⁇ RRH3 are connected to the same BBU.
  • RRH0 ⁇ RRH3 jointly send data to the UE.
  • the CRS sent by RRH3 occupies the same fixed position time-frequency resources. Therefore, the CRS sent by RRH0 to RRH3 to the UE form a 4-path signal, which causes a Doppler spread problem.
  • the CRS occupies time-frequency resources at a fixed location, which will cause a certain degree of waste of time-frequency resources.
  • the embodiments of the present application provide a data transmission method and device, which can improve the accuracy of UE receiving data in a fast-moving scenario.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • data may refer to codewords, transport blocks, code blocks, code block groups, and so on.
  • At least one refers to one or more, and “multiple” refers to two or more than two.
  • “And/or” describes the association relationship of the associated object, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one (item) or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • At least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.
  • Embodiment 1 Refer to FIG. 3, which is a flowchart of a data transmission method provided by this application.
  • the method can be applied to a communication system of SFN networking, in which multiple network devices can use the same frequency as a terminal The equipment sends data jointly.
  • the multiple network devices may be RRHs, and the multiple network devices access the same BBU.
  • This method can be applied to communication devices or chips or chipsets.
  • the following description takes a communication device as an example, and the method includes:
  • Each of multiple network devices sends an indication message to the terminal device.
  • the indication information is used to indicate the QCL information of the control channel or the data channel, and the QCL information indicates that the control channel or the data channel has a quasi co-location relationship with multiple reference signals.
  • the terminal device receives the instruction information.
  • the indication information may be TCI state.
  • the indication information is collectively referred to as TCI state below.
  • the indication information can be sent through one piece of signaling, or through multiple pieces of signaling.
  • the multiple reference signals may include at least one of the following: CSI-RS for tracking (TRS) and SSB.
  • TRS CSI-RS for tracking
  • SSB SSB
  • the reference can also be other signals, which are not specifically limited here.
  • the multiple reference signals may be configured by high-level signaling (such as radio resource control (RRC) signaling).
  • RRC radio resource control
  • the data channel or the control channel may include a demodulation reference signal (DMRS).
  • DMRS can be configurable.
  • the TCI state may include a piece of configuration information indicating the quasi co-location information, the configuration information includes a reference signal list, and the reference signal list includes identifiers of multiple reference signals.
  • the QCL information is associated with the multiple reference signals by carrying the identifiers of multiple reference signals in the reference signal list included in the configuration information of the QCL information.
  • the configuration information of TCI state may be:
  • QCL-Info is configuration information indicating QCL information
  • csi-rs-ResourceIdList and ssbList are reference signal lists. If the reference signal is a TRS, the csi-rs-ResourceIdList includes identifiers of multiple TRSs, and the multiple TRSs are associated with the QCL information. If the reference signal is an SSB, the ssbList includes the identities of multiple SSBs, and the multiple SSBs are associated with the QCL information.
  • the TRS corresponding to multiple TRS identifiers in the csi-rs-ResourceIdList may belong to different NZP-CSI-RS-ResourceSets with trs-Info.
  • the SSBs corresponding to multiple SSB indexes in the ssbList can correspond to different beams.
  • the TCI state may include a plurality of configuration information indicating the quasi co-location information, and the plurality of configuration information is associated with a plurality of reference signals one by one.
  • each configuration information includes reference signal information
  • the reference signal information includes an identifier of a reference signal associated with the configuration information.
  • TCI state can be configured: a "type A", where the "type A” includes a CSI-RS in an NZP-CSI-RS-ResourceSet with trs-Info. Or, two “type A” ", the CSI-RS resources included in the two "type A” belong to two different NZP-CSI-RS-ResourceSets with trs-Info.
  • the TCI state can also be configured: “type D”, the "type D” can include the same CSI-RS resource as "type A”.
  • NZP-CSI-RS-ResourceSet can be configured through high-level signaling (such as RRC signaling).
  • step S301 may be implemented in the following manner:
  • the network device may configure multiple TCI states through the high-level RRC. For example, 64 TCI states are configured for each CORESET. And through the media access control control element (MAC CE) to activate a current TCI state.
  • MAC CE media access control control element
  • step S301 may be implemented in the following manner: for the data channel, the network device may configure multiple TCI states through the high-level RRC, for example, configure 128 TCI states. And activate at least one TCI state through MAC CE. For example, when a TCI state is activated, the TCI state can be understood as the current TCI state to be used; when the activation is greater than one TCI state, for example, 8 TCI states are activated, and then the downlink control information (DCI) indicates the current state. The TCI state to be used.
  • DCI downlink control information
  • the multiple network devices send a control channel or a data channel to the terminal device according to the quasi co-location information.
  • the terminal device receives control channels or data channels from multiple network devices.
  • S303 The terminal device performs Doppler frequency offset estimation according to the quasi co-location information with multiple reference signals, and obtains a comprehensive Doppler frequency offset estimation result.
  • the terminal device may perform Doppler frequency offset estimation on multiple reference signals respectively according to the quasi co-location information, and obtain Doppler frequency offset estimation results respectively corresponding to the multiple reference signals. Combine the Doppler frequency offset estimation results corresponding to multiple reference signals to obtain a comprehensive Doppler frequency offset estimation result.
  • the terminal device can perform Doppler frequency offset estimation on TRS1, TRS2, and TRS3 respectively according to type A to obtain TRS1 Doppler frequency offset estimation result, TRS2 Doppler frequency offset estimation result, TRS3 Doppler frequency offset estimation result. Then the Doppler frequency offset estimation result of TRS1, the Doppler frequency offset estimation result of TRS2 and the Doppler frequency offset estimation result of TRS3 are combined to obtain a comprehensive Doppler frequency offset estimation result.
  • the terminal device demodulates the control channel or the data channel based on the integrated Doppler frequency offset estimation result.
  • the terminal device may perform time-frequency offset calibration and channel estimation according to the integrated Doppler frequency offset estimation result to obtain the channel estimation result, and demodulate the control channel or the data channel according to the channel estimation result.
  • network device 1 and network device 2 jointly send data 1 to the UE. It should be understood that this is only an exemplary description, and does not specifically limit the number of network devices and the number of reference signals in the data transmission process.
  • the data transmission process can be:
  • the network device 1 and the network device 2 send DCI1 to the UE.
  • the DCI1 indicates the TCI state
  • the TCI state indicates the QCL information of the data channel
  • the QCL information indicates that the data channel has a quasi co-location relationship with TRS1 and TRS2.
  • the TCI state can be configured as:
  • referenceSignal is the associated reference signal type, here is TRS, that is, CSI-RS for tracking
  • csi-rsResourceIdList is the associated reference signal identifier list, which specifically includes NZP-CSI-RS-ResourceId[1] and NZP-CSI-RS -ResourceId[2]
  • NZP-CSI-RS-ResourceId[1] refers to TRS1
  • NZP-CSI-RS-ResourceId[2] refers to TRS2.
  • TCI-State may also include other quasi co-location information, such as qcl-Type2.
  • the TCI state may be:
  • the referenceSignal in qcl-Type1 and qcl-Type2 indicates that they are associated with different reference signals, but have the same qcl-Type.
  • both can be of type A
  • qcl-Type1 indicates that the data channel and TRS1 have a quasi co-location relationship.
  • the quasi co-location relationship is type A quasi co-location type
  • qcl-Type2 indicates that the data channel and TRS2 have a quasi co-location relationship
  • the quasi co-location relationship is type A quasi co-location type.
  • TCI-State may also include other quasi co-location information, such as qcl-Type3.
  • the network device 1 sends data 1 to the UE according to TRS1
  • the network device 2 sends data 1 to the UE according to TRS2.
  • the UE performs Doppler frequency offset estimation on TRS1 and TRS2 respectively according to the received TCI state, and obtains the Doppler frequency offset estimation result of TRS1 and the Doppler frequency offset estimation result of TRS2.
  • the UE combines the Doppler frequency offset estimation result of TRS1 and the Doppler frequency offset estimation result of TRS2 to obtain a comprehensive Doppler frequency offset estimation result.
  • the UE performs time-frequency offset calibration and channel estimation according to the integrated Doppler frequency offset estimation result to obtain the channel estimation result.
  • the UE demodulates data 1 according to the channel estimation result.
  • the quasi co-location information is associated with multiple reference signals, that is, the data channel has a quasi co-location relationship with multiple reference signals, so that the terminal device can be based on multiple reference signals in the presence of multipath signals.
  • the reference signal estimates more accurate channel information and Doppler frequency offset, which can improve the accuracy of channel estimation, such as the accuracy of the time domain difference of channel estimation, to improve the performance of reception.
  • Embodiment 2 provides another data transmission method, which can be applied to a communication system of SFN networking, in which multiple network devices can use the same frequency to jointly send data to terminal devices.
  • the multiple network devices may be RRHs, and the multiple network devices access the same BBU.
  • RRH for the convenience of description, the following uses RRH as an example for description.
  • the network device configures the UE with two or more sets of TCI states associated with different RRHs. At a certain moment, the network device activates only one TCI state, and only N RRHs among the multiple RRHs send the UE to the UE according to the TCI state.
  • the N is an integer greater than or equal to 1. The following takes N equal to 1 as an example for description. As shown in Figure 5, the data transmission process can be:
  • the first RRH sends a first DCI to the terminal device, where the first DCI is used to activate the first TCI state to be used currently, and sends data 1 to the terminal device according to the first TCI state.
  • the terminal device demodulates the data 1 according to the first TCI state.
  • the terminal device can perform time-frequency offset tracking and channel estimation according to the first TCI state, and demodulate data 1. Specifically, it can perform Doppler frequency offset estimation to obtain Doppler frequency offset estimation. result. According to the Doppler frequency offset estimation result, time-frequency offset calibration and channel estimation are performed to obtain the channel estimation result, and data 1 is demodulated according to the channel estimation result.
  • the terminal device measures the channel quality of the first RRH and one or more other RRHs, where the first RRH and the one or more other RRHs are connected to the same BBU, and the quality parameters are used to characterize the reference signal quality parameters, such as
  • the quality parameter may be reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received quality, RSRQ), and so on.
  • the terminal device reports a quality parameter set to the first RRH, where the quality parameter set includes quality parameters of the first RRH and one or more other RRHs.
  • the terminal device may periodically measure and report the quality parameter set.
  • the first RRH sends the measured quality parameter set to the BBU.
  • the BBU determines the RRH that will provide services for the terminal device according to the set of quality parameters reported by the terminal device. It is assumed that the BBU determines that the RRH that will provide services for the terminal device is switched from the first RRH to the second RRH.
  • the BBU may determine that the RRH corresponding to the largest quality parameter in the quality parameter set is the RRH provided for the terminal device.
  • the BBU may determine the quality parameter change process of each RRH according to the historical data of the quality parameters of each RRH, and determine the RRH providing service for the terminal device according to the change process. For example, the RRH whose quality parameter gradually increases is determined to be the RRH that provides services for the terminal device.
  • the BBU can determine the quality parameters in the quality parameter set that are greater than the quality parameter threshold, determine the quality parameter change process of each RRH according to the historical data of the RRH corresponding to these quality parameters, and determine the terminal according to the change process
  • the RRH that the device provides services For example, the RRH whose quality parameter gradually increases is determined to be the RRH that provides services for the terminal device.
  • the BBU can also use other methods to determine the RRH provided for the terminal device, which will not be listed here.
  • the second RRH sends a second DCI to the terminal device, where the second DCI is used to activate the second TCI state currently to be used.
  • the second TCI state may be the same as the first TCI state or different from the first TCI state, which is not specifically limited here.
  • the first RRH may stop sending data 1 to the terminal device.
  • step B8 the terminal device activates the second TCI state.
  • step B9 may be executed, that is, step B8 may not be executed.
  • the second RRH sends data 1 to the terminal device according to the second TCI state.
  • the terminal device demodulates the data 1 according to the second TCI state.
  • the process in which the terminal device demodulates the data 1 according to the second TCI state is similar to that of the terminal device demodulates the data 1 according to the first TCI state, and the similarities are not repeated here.
  • the terminal device only needs to track one TCI state at a time, that is, only one set of TCI state is activated for the terminal device, which can reduce the implementation complexity.
  • Embodiment 3 provides another data transmission method, which can be applied to a communication system of SFN networking, in which multiple network devices can use the same frequency to jointly send data to terminal devices.
  • the multiple network devices may be RRHs, and the multiple network devices access the same BBU.
  • RRH for the convenience of description, the following uses RRH as an example for description.
  • the network device activates at least two TCI states for the terminal device, and only N RRHs among the multiple RRHs send data to the UE at a certain moment, where N is an integer greater than or equal to 1.
  • the network device activates two TCI states, and only one RRH among multiple RRHs sends data to the UE at a certain time is taken as an example for description.
  • the data transmission process can be:
  • the first RRH sends a first DCI to the terminal device, where the first DCI is used to indicate the first TCI state of the two TCI states, and the first TCI state is used for data transmission under the current first RRH.
  • the BBU can configure multiple TCI states through high-level RRC signaling, and activate two of the TCI states through MAC CE.
  • the second RRH sends a second DCI to the terminal device, where the second DCI is used to indicate the second TCI state of the two TCI states.
  • the second TCI state may be the same as the first TCI state or different from the first TCI state, which is not specifically limited here.
  • the first RRH may stop sending data 1 to the terminal device.
  • the data channel and the control channel can use the same TCI state or different TCI states. If the data channel and the control channel use the same TCI state, the MAC-CE can be used to indicate the newly switched TCI state of the control channel. This TCI state can be applied to the data channel and the control channel. In this implementation, two sets of associations can be configured TRS of different TCI states. If the data channel and the control channel use different TCI states, the TCI state of the control channel can be unchanged, and the TCI state of the data channel is dynamically indicated by the DCI according to the specific RRH that provides the service.
  • the terminal device can obtain accurate Doppler frequency offset information according to different TCI states in different coverage areas, thereby avoiding the Doppler spreading problem caused by multipath, and then more accurately estimating and The Doppler frequency offset is corrected so that the UE can lock the beam for sending and receiving data more accurately during high-speed movement, and improve the receiving performance.
  • the terminal device in the third embodiment above simultaneously tracks two or more TCI states, so that when the terminal device switches the TCI state, the time for activating the new TCI state can be saved, so that the interruption of data transmission can be avoided to a certain extent.
  • Embodiment 4 provides another data transmission method, which can be applied to a communication system in an SFN networking, in which multiple network devices can use the same frequency to jointly send data to terminal devices.
  • the multiple network devices may be RRHs, and the multiple network devices access the same BBU.
  • RRH for the convenience of description, the following uses RRH as an example for description.
  • the network device activates a TCI state
  • the configured reference signals are all associated with the TCI state
  • all RRHs connected to the same BBU jointly send data to the terminal device according to the TCI state.
  • RRH1 and RRH2 both send DCI1 to the terminal device, and the DCI1 is used to indicate TCI state1.
  • Both RRH1 and RRH2 use TCI state1 to send data 1 to the terminal device, as shown in Figure 6.
  • Embodiment 5 provides another data transmission method, which can be applied to a communication system of SFN networking, in which multiple network devices can use the same frequency to jointly send data to terminal devices.
  • the multiple network devices may be RRHs, and the multiple network devices access the same BBU.
  • RRH for the convenience of description, the following uses RRH as an example for description.
  • the network device can configure multiple TCI states associated with different TRSs for the UE, and different RRHs can independently indicate the corresponding TCI states through DCI and schedule different data.
  • RRH1 indicates TCI state1 to the terminal device through DCI1
  • RRH2 indicates TCI state2 to the terminal device through DCI2
  • TCI state1 and TCI state2 may be the same or different, and there is no specific limitation here.
  • different RRHs can independently indicate corresponding TCI states through DCI and schedule different data, which can improve the data reception of cell edge users, and thus can improve the spectrum utilization.
  • the embodiment of the present application provides a data transmission device.
  • the structure of the data transmission device may be as shown in FIG. 8, including a processing unit 801 and a communication unit 802.
  • the data transmission device may be specifically used to implement the method executed by the terminal device in the embodiment of FIG. 3 or FIG. 4.
  • the device may be the terminal device itself, or the chip or chipset or chip in the terminal device. Part of the function used to perform related methods.
  • the communication unit 802 is configured to receive an indication information, the indication information is used to indicate the quasi co-location information of the control channel or the data channel, and the quasi co-location information indicates that the control channel or the data channel has a quasi co-location relationship with multiple reference signals; And, receiving control channels or data channels from multiple network devices; the processing unit 801 is configured to perform Doppler frequency offset estimation according to the quasi co-location information with multiple reference signals to obtain a comprehensive Doppler frequency offset Estimation result; and demodulating the control channel or the data channel based on the integrated Doppler frequency offset estimation result.
  • the processing unit 801 when performing Doppler frequency offset estimation based on the quasi co-location information with multiple reference signals to obtain a comprehensive Doppler frequency offset estimation result, can be specifically used to: Doppler frequency offset estimation is performed on multiple reference signals respectively, and the Doppler frequency offset estimation results corresponding to the multiple reference signals are obtained; the Doppler frequency offset estimation results corresponding to the multiple reference signals are combined to obtain a comprehensive Doppler frequency offset Frequency offset estimation result.
  • the indication information may include a piece of configuration information indicating quasi co-location information, the configuration information includes a reference signal list, and the reference signal list includes identifiers of multiple reference signals.
  • the indication information may also include a plurality of configuration information indicating quasi co-location information, wherein the plurality of configuration information is associated with a plurality of reference signals one by one.
  • the multiple reference signals may include at least one of the following: TRS and SSB.
  • the data transmission device may be specifically used to implement the method executed by the network device in the embodiment of FIG. 3 or FIG. 4.
  • the device may be the network device itself, or the chip or chipset in the network device A part of the chip used to perform related method functions.
  • the communication unit 802 is configured to send an indication information, the indication information is used to indicate the quasi co-location information of the control channel or the data channel, and the quasi co-location information indicates that the multiple reference signals of the control channel or the data channel have a quasi co-location relationship; processing
  • the unit 801 is configured to send a control channel or a data channel to a terminal device through the communication unit 802 according to the quasi co-location information.
  • the indication information may include a piece of configuration information indicating quasi co-location information, the configuration information includes a reference signal list, and the reference signal list includes identifiers of multiple reference signals.
  • the indication information may also include a plurality of configuration information indicating quasi co-location information, wherein the plurality of configuration information is associated with a plurality of reference signals one by one.
  • the multiple reference signals may include at least one of the following: TRS and SSB.
  • the data transmission device can be specifically used to implement the method executed by the terminal device in the second embodiment shown in FIG. 5.
  • the device can be the terminal device itself, or the chip or chipset or chip in the terminal device. Part of the function used to perform related methods.
  • the communication unit 802 is configured to receive first information, the first information is used to activate a transmission configuration to indicate the TCI state, and the TCI state is associated with a tracking reference signal TRS resource; and, to receive information from the first remote radio head RRH TRS, the first RRH is the RRH currently providing service among the multiple RRHs connected to the same baseband processing unit BBU, and the TRS is the TRS corresponding to the TRS resource.
  • the processing unit 801 is configured to perform at least one of the following based on TRS: channel estimation and Doppler frequency offset estimation.
  • the communication unit 802 is further configured to receive second information from the first RRH, where the second information is used to indicate a handover from the first RRH to the second RRH.
  • the processing unit 801 is further configured to switch from the first RRH to the second RRH.
  • the processing unit 801 is further configured to, before the communication unit 802 receives the second information from the first RRH, perform signal quality measurements on the reference signals sent by the multiple RRHs to obtain the measurement values respectively corresponding to the multiple RRHs.
  • the communication unit is also used to report to the first RRH the measurement values respectively corresponding to the multiple RRHs.
  • the communication unit 802 is further configured to, before the processing unit 801 is switched from the first RRH to the second RRH, perform at least one of the following based on TRS: channel estimation and Doppler frequency offset estimation, and receive the result from Data of the first RRH.
  • the data transmission device can be specifically used to implement the method executed by the terminal device in the second embodiment shown in FIG. 5.
  • the device can be the terminal device itself, or the chip or chipset or chip in the terminal device. Part of the function used to perform related methods.
  • the communication unit 802 is configured to receive first information, which is used to activate the first TCI state and the second TCI state; and, receive the first TRS from the first RRH and the second TRS from the second RRH.
  • the first RRH is the RRH currently providing service among multiple RRHs connected to the same baseband processing unit BBU, the first TRS is the TRS corresponding to the first TCI state, and the second TRS is the The TRS corresponding to the second TCI state;
  • the processing unit 801 is configured to perform at least one of the following based on the first TRS: channel estimation, Doppler frequency offset estimation, or, when switching from the first RRH to the first TRS After the second RRH, at least one of the following is performed based on the second TRS: channel estimation and Doppler frequency offset estimation.
  • the communication unit 802 is further configured to receive second information from the first RRH before the processing unit 801 is switched from the first RRH to the second RRH, where the second information is used to indicate Handover from the first RRH to the second RRH.
  • the processing unit 801 may also be configured to perform signal quality measurements on the reference signals sent by the multiple RRHs before the communication unit 802 receives the second information from the first RRH, to obtain the respective corresponding values of the multiple RRHs. Measurements.
  • the communication unit 802 is further configured to report respective measurement values corresponding to the multiple RRHs to the first RRH.
  • the processing unit 801 is further configured to perform at least one of the following based on the first TRS: channel estimation and Doppler frequency offset estimation, and perform at least one of the following based on the first TRS: channel estimation ,
  • the result obtained by Doppler frequency offset estimation, the data from the first RRH is received through the communication unit 802.
  • the processing unit 801 is further configured to perform at least one of the following based on the second TRS: channel estimation and Doppler frequency offset estimation, and perform at least one of the following based on the second TRS: channel estimation ,
  • the result obtained by Doppler frequency offset estimation, the data from the second RRH is received through the communication unit 802.
  • the data transmission device can be specifically used to implement the method executed by the terminal device in the embodiment shown in FIG. Used to perform a part of the related method function.
  • the communication unit 802 is used to perform the sending and receiving actions of the terminal device in the fourth embodiment, such as receiving DCI1
  • the processing unit 801 is used to perform other actions of the terminal device in the fourth embodiment in addition to the sending and receiving actions, or through
  • the communication unit 802 transmits and receives signals, such as receiving DCI1 through the communication unit 802 and the like.
  • the data transmission device can be specifically used to implement the method executed by the terminal device in the embodiment shown in FIG. Used to perform a part of the related method function.
  • the communication unit 802 is used to perform the transceiving actions of the terminal device in the fifth embodiment above, such as receiving data sent by multiple network devices
  • the processing unit 801 is used to perform the terminal device transceiving actions in the fourth embodiment above except for the transceiving actions.
  • the division of modules in the embodiments of this application is illustrative, and it is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of this application can be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It can be understood that the function or implementation of each module in the embodiment of the present application may further refer to the related description of the method embodiment.
  • the data transmission device may be as shown in FIG. 9, the data transmission device may be a communication device or a chip in a communication device, where the communication device may be a terminal device or a network device.
  • the device may include a processor 901, a communication interface 902, and a memory 903.
  • the processing unit 801 may be a processor 901.
  • the communication unit 802 may be a communication interface 902.
  • the processor 901 may be a central processing unit (central processing unit, CPU), or a digital processing unit, and so on.
  • the communication interface 902 may be a transceiver, an interface circuit such as a transceiver circuit, etc., or a transceiver chip, and so on.
  • the device further includes: a memory 903, configured to store a program executed by the processor 901.
  • the memory 903 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), such as a random access memory (random access memory). -access memory, RAM).
  • the memory 903 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 processor 901 is configured to execute the program code stored in the memory 903, and is specifically configured to execute the actions of the above-mentioned processing unit 801, which will not be repeated in this application.
  • the communication interface 902 is specifically configured to perform the actions of the above-mentioned communication unit 802, which will not be repeated in this application.
  • the embodiment of the present application does not limit the specific connection medium between the communication interface 902, the processor 901, and the memory 903.
  • the memory 903, the processor 901, and the communication interface 902 are connected by a bus 904 in FIG. 9.
  • 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 in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions required to execute the above-mentioned processor, which contains a program required to execute the above-mentioned processor.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server 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, DVD), or a semiconductor medium (for example, SSD).
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

本申请公开了一种数据传输方法及装置，可以提高数据传输的准确性。该方法包括：接收一用于指示控制信道或数据信道的准共址信息的指示信息，该准共址信息指示控制信道或数据信道与多个参考信号具有准共址关系。根据与多个参考信号之间的准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果，并基于综合的多普勒频偏估计结果解调来自多个网络设备的控制信道或数据信道。通过将准共址信息与多个参考信号关联，即数据信道或控制信道与多个参考信号存在准共址关系，从而终端设备可以在多径信号存在的情况下，可以根据多个参考信号估计出较准确的信道信息和多普勒频偏，进而可以提高信道估计的精度。

Description

一种数据传输方法及装置 技术领域
本申请涉及通信技术领域，特别涉及一种数据传输方法及装置。
背景技术
目前，无线覆盖技术主要存在3种组网方式：单频网络(single frequency network，SFN)、双频网以及多频网。其中，单频网可以实现在同一时间、使用同一频率，对于一定范围内进行信号覆盖，减少用户设备(user equipment，UE)切换的次数。在长期演进(long-term evolution，LTE)中，单频组网可以通过多个射频拉远头(remote radio head，RRH)-s连接到一个基带单元(base band unit，BBU)，该多个RRH-s使用相同的小区标识(Cell ID)，连接到一个BBU上的所有RRH联合向一个UE发送数据，UE会同时接收到来自多个RRH的公共参考信号(cell-specific reference signal，CRS)参考信号。当RRH发送天线端口数确定时，对应的CRS资源固定。
LTE中连接到一个BBU上的所有RRH联合向一个UE发送数据，UE会同时接收到来自多个RRH相同的CRS。在一些高速移动的场景中，例如高铁上、动车上等，UE在利用CRS进行多普勒频谱估计时，由于所有连接到一个BBU上的RRH-s发送的CRS占用相同的固定位置的时频资源，这些RRH发送的CRS到达UE时会形成多径信号，从而会出现多普勒扩展问题，导致UE下行同步不能很好地确定中心频率，进而降低接收数据的准确性。
发明内容
本申请提供一种数据传输方法及装置、芯片、计算机可读存储介质、计算机程序产品等，可以提高数据传输的准确性。
第一方面，本申请实施例提供的一种数据传输方法，该方法可以应用于终端设备，或者终端设备中的芯片或芯片组，该方法包括：接收一指示信息，所述指示信息用于指示控制信道或数据信道的准共址信息，所述准共址信息指示所述控制信道或数据信道与多个参考信号具有准共址关系。接收来自多个网络设备的控制信道或数据信道。根据与所述多个参考信号之间的所述准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果，并基于所述综合的多普勒频偏估计结果解调所述控制信道或所述数据信道。
本申请实施例中，准共址信息与多个参考信号关联，即数据信道(或控制信道)与多个参考信号存在准共址关系，从而终端设备可以在多径信号存在的情况下，可以根据多个参考信号估计出较准确的信道信息和多普勒频偏，进而可以提高信道估计的精度，如信道估计时域差值的精度等，以提升接收的性能。
在一种可能的设计中，根据与所述多个参考信号之间的所述准共址信息进行多普勒频偏估计时，可以根据所述准共址信息，对所述多个参考信号分别进行多普勒频偏估计，得到所述多个参考信号分别对应的多普勒频偏估计结果；合并所述多个参考信号对应的多普勒频偏估计结果，得到所述综合的多普勒频偏估计结果。
上述设计中通过合并多个参考信号的多普勒频偏估计结果，可以得到一个比较准确的 综合多普勒频偏估计结果，从而可以提高信道估计的精度。
在一种可能的设计中，所述指示信息可以包括一个指示所述准共址信息的配置信息，所述配置信息中包括参考信号列表，所述参考信号列表包括所述多个参考信号的标识。上述设计中可以在配置信息的参考信号列表中携带多个参考信号的标识，使得数据信道(或控制信道)与多个参考信号存在准共址关系。
在一种可能的设计中，所述指示信息包括多个指示所述准共址信息的配置信息，其中，所述多个配置信息与所述多个参考信号一一关联。上述设计中，通过在指示信息中包括多个与不同参考信号关联且指示相同准共址信息的配置信息，使得数据信道(或控制信道)与多个参考信号存在准共址关系。
在一种可能的设计中，所述多个参考信号可以包括如下至少一项：追踪参考信号(CSI-RS for tracking，TRS)、同步信号广播信道块(synchronisation signal/PBCH block，SSB)。
第二方面，本申请实施例提供的一种数据传输方法，该方法可以应用于网络设备，或者网络设备中的芯片或芯片组，该方法包括：发送一指示信息，所述指示信息用于指示控制信道或数据信道的准共址信息，所述准共址信息指示所述控制信道或数据信道多个参考信号具有准共址关系；根据所述准共址信息向终端设备发送控制信道或数据信道。
本申请实施例中，准共址信息与多个参考信号关联，即数据信道(或控制信道)与多个参考信号存在准共址关系，从而终端设备可以在多径信号存在的情况下，可以根据多个参考信号估计出较准确的信道信息和多普勒频偏，进而可以提高信道估计的精度，如信道估计时域差值的精度等，以提升接收的性能。
在一种可能的设计中，所述准共址信息的配置信息中包括参考信号列表，所述参考信号列表包括所述多个参考信号的标识。上述设计中可以在配置信息的参考信号列表中携带多个参考信号的标识，使得数据信道(或控制信道)与多个参考信号存在准共址关系。
在一种可能的设计中，所述指示信息包括多个指示所述准共址信息的配置信息，其中，所述多个配置信息与所述多个参考信号一一关联。上述设计中，通过在指示信息中包括多个与不同参考信号关联且指示相同准共址信息的配置信息，使得数据信道(或控制信道)与多个参考信号存在准共址关系。
在一种可能的设计中，所述多个参考信号可以包括如下至少一项：TRS、SSB。
第三方面，本申请实施例提供的一种数据传输方法，该方法可以应用于终端设备，或者终端设备中的芯片或芯片组，该方法包括：接收第一信息，所述第一信息用于激活一个TCI状态，所述TCI状态与一个TRS资源相关联。接收来自第一射频拉远头RRH的TRS，所述第一RRH是连接同一个基带处理单元BBU的多个RRH中当前提供服务的RRH，所述TRS为所述TRS资源对应的TRS。基于所述TRS进行如下至少一项：信道估计、多普勒频偏估计。上述实施例二中，终端设备一个时刻只需跟踪一个TCI state，即只给终端设备激活一套TCI state，可以降低实现复杂度。
在一种可能的设计中，接收来自所述第一RRH的第二信息，所述第二信息用于指示由所述第一RRH切换到第二RRH；由所述第一RRH切换到所述第二RRH。
在一种可能的设计中，在接收来自所述第一RRH的第二信息之前，还包括：针对所述多个RRH发送的参考信号分别进行信号质量测量，得到所述多个RRH分别对应的测量值；向所述第一RRH上报所述多个RRH分别对应的测量值。
在一种可能的设计中，在由所述第一RRH切换到所述第二RRH之前，还包括：根据基于所述TRS进行如下至少一项：信道估计、多普勒频偏估计得到的结果，接收来自所述第一RRH的数据。
第四方面，本申请实施例提供的一种数据传输方法，该方法可以应用于终端设备，或者终端设备中的芯片或芯片组，该方法包括：接收第一信息，所述第一信息用于激活第一TCI状态和第二TCI状态；接收来自第一RRH的第一TRS以及来自第二RRH的第二TRS，所述第一RRH是连接同一个基带处理单元BBU的多个RRH中当前提供服务的RRH，所述第一TRS为所述第一TCI状态对应的TRS，所述第二TRS为所述第二TCI状态对应的TRS；基于所述第一TRS进行如下至少一项：信道估计、多普勒频偏估计，或者，在由所述第一RRH切换到所述第二RRH之后基于所述第二TRS进行如下至少一项：信道估计、多普勒频偏估计。
本申请实施例中，数据信道和控制信道可以使用相同的TCI state，也可以使用不同的TCI state。如果数据信道和控制信道使用相同的TCI state，则可以通过MAC-CE指示控制信道新切换的TCI state，该TCI state可以适用于数据信道和控制信道，这种实现方式中，可以配置两套关联不同TCI state的TRS。如果数据信道和控制信道使用不同的TCI states，则控制信道的TCI state可以不变，数据信道的TCI state根据具体提供服务的RRH通过DCI动态指示。
并且，终端设备在不同的覆盖范围内，能够根据不同的TCI state获取准确的多普勒频偏信息，从而可以避免多径引起的多普勒扩展问题，进而可以比较准确地估计和纠正多普勒频偏，使得UE在高速移动的过程中，可以比较准确地锁定收发数据的波束，提高接收性能。并且，上述实施例三中终端设备同时跟踪两套或两套以上TCI state，从而终端设备切换TCI state时，可以节省激活新TCI state的时间，从而在一定成度上可以避免数据传输的中断。
在一种可能的设计中，在由所述第一RRH切换到所述第二RRH之前，所述方法还包括：接收来自所述第一RRH的第二信息，所述第二信息用于指示由所述第一RRH切换到所述第二RRH。
在一种可能的设计中，在接收来自所述第一RRH的第二信息之前，还包括：针对所述多个RRH发送的参考信号分别进行信号质量测量，得到所述多个RRH分别对应的测量值；向所述第一RRH上报所述多个RRH分别对应的测量值。
在一种可能的设计中，在基于所述第一TRS进行如下至少一项：信道估计、多普勒频偏估计之后，还包括：根据基于所述第一TRS进行如下至少一项：信道估计、多普勒频偏估计得到的结果，接收来自所述第一RRH的数据。
在一种可能的设计中，在基于所述第二TRS进行如下至少一项：信道估计、多普勒频偏估计之后，还包括：根据基于所述第二TRS进行如下至少一项：信道估计、多普勒频偏估计得到的结果，接收来自所述第二RRH的数据。
第五方面，本申请提供一种数据传输装置，该装置可以是通信设备，也可以是通信设备内的芯片或芯片组，其中，通信设备可以为终端设备也可以是网络设备。该装置可以包括处理模块和收发模块。当该装置是通信设备时，该处理模块可以是处理器，该收发模块可以是收发器；该装置还可以包括存储模块，该存储模块可以是存储器；该存储模块用于存储指令，该处理模块执行该存储模块所存储的指令，以使终端设备执行上述第一方面或 第三方面或第四方面中相应的功能，或者，该处理模块执行该存储模块所存储的指令，以使网络设备执行上述第二方面中相应的功能。当该装置是通信设备内的芯片或芯片组时，该处理模块可以是处理器或处理电路，该收发模块可以是输入/输出接口、管脚或电路等；该处理模块执行存储模块所存储的指令，以使终端设备执行上述第一方面或第三方面或第四方面中相应的功能，或者，该处理模块执行存储模块所存储的指令，以使网络设备执行上述第二方面中相应的功能。该存储模块可以是该芯片或芯片组内的存储模块(例如，寄存器、缓存等)，也可以是该基站内的位于该芯片或芯片组外部的存储模块(例如，只读存储器、随机存取存储器等)。
第六方面，提供了一种数据传输装置，包括：处理器、通信接口和存储器。通信接口用于该装置与其他装置之间传输信息、和/或消息、和/或数据。该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第一方面或第一方面中任一设计、第二方面或第二方面中任一设计、第三方面或第三方面中任一设计、第四方面或第四方面中任一设计所述的方法。
第七方面，本申请实施例提供的一种计算机存储介质，该计算机存储介质存储有程序指令，当程序指令在通信设备上运行时，使得通信设备执行本申请实施例第一方面及其任一可能的设计、第二方面及其任一可能的设计、第三方面或第三方面中任一设计、第四方面或第四方面中任一设计的方法。
第八方面，本申请实施例提供的一种计算机程序产品，当计算机程序产品在通信设备上运行时，使得通信设备本申请实施例第一方面及其任一可能的设计、第二方面及其任一可能的设计、第三方面或第三方面中任一设计、第四方面或第四方面中任一设计的方法。
第九方面，本申请实施例提供的一种芯片，所述芯片与存储器耦合，执行本申请实施例第一方面及其任一可能的设计、第二方面及其任一可能的设计、第三方面或第三方面中任一设计、第四方面或第四方面中任一设计的方法。
第十方面，本申请实施例提供一种芯片，包括通信接口和至少一个处理器，所述通信接口用于输出和/或输入信号，或用于接收计算机程序代码或指令并传输至所述处理器，所述处理器运行计算机程序代码以执行本申请实施例第一方面或第一方面中任一设计、第二方面及其任一可能的设计所述的方法。
需要说明的是，本申请实施例中“耦合”是指两个部件彼此直接或间接地结合。
附图说明
图1为本申请实施例提供的一种通信系统的架构示意图；
图2为本申请实施例提供的一种SFN组网下数据传输的示意图；
图3为本申请实施例提供的一种数据传输方法的流程图；
图4为本申请实施例提供的一种数据传输过程的示意图；
图5为本申请实施例提供的另一种数据传输过程的示意图；
图6为本申请实施例提供的另一种数据传输过程的示意图；
图7为本申请实施例提供的另一种数据传输过程的示意图；
图8为本申请实施例提供的一种数据传输装置的架构示意图；
图9为本申请实施例提供的一种数据传输装置的架构示意图。
具体实施方式
为了方便理解本申请实施例，下面介绍与本申请实施例相关的术语：
1、准共址(quasi co-location，QCL)：
准共址，也可以称为准共站、同位置。
具有QCL关系的天线端口对应的信号中可以具有相同的或相近的空间特性参数(或称为参数)，或者，一个天线端口的空间特性参数(或称为参数)，可以用于确定与该天线端口具有QCL关系的另一个天线端口的空间特性参数(或称为参数)，或者，两个天线端口具有相同的或相似的空间特性参数(或称为参数)，或者，两个天线端口间的空间特性参数(或称为参数)差小于某阈值。
应理解，满足QCL关系的两个参考信号或信道的空间特性参数是相同的(或相近的，或相似的)，从而基于源参考信号资源索引可推断出目标参考信号的空间特性参数。
还应理解，满足空间相关性信息的两个参考信号或信道的空间特性参数是相同的(或相近的，或相似的)，从而基于该源参考信号资源索引可推断出目标参考信号的空间特性参数。
其中，空间特性参数包括以下参数中的一种或多种：
入射角(angle of arrival，AoA)、主(dominant)入射角AoA、平均入射角、入射角的功率角度谱(power angular spectrum，PAS)、出射角(angle of departure，AoD)、主出射角、平均出射角、出射角的功率角度谱、终端设备发送波束成型、终端设备接收波束成型、空间信道相关性、网络设备发送波束成型、网络设备接收波束成型、平均信道增益、平均信道时延(average delay)、时延扩展(delay spread)、多普勒扩展(Doppler spread)、多普勒频移(doppler shift)、空间接收参数(spatial Rx parameters)等。
其中，上述角度可以为不同维度的分解值，或不同维度分解值的组合。
现有标准中定义了四种类型的QCL，网络设备可以同时给终端设备配置一个或多个类型的QCL，如QCL type A+D，C+D：
QCL type A：Doppler shift，Doppler spread，average delay，delay spread
QCL type B：Doppler shift，Doppler spread
QCL type C：Doppler shift,average delay
QCL type D：Spatial Rx parameter
应理解，上述四种类型的QCL也可以命名为其他，如，QCL type A也可以称为type A，QCL-type A，Type A等等，其他类型的QCL类似，这里不做具体限定。为了描述上的方便，下面将QCL type A统一称为type A，QCL type B统一称为type B，QCL type C统一称为type C，QCL type D统一称为type D。
当QCL关系为type D的QCL关系时，可以认为是空域QCL。当天线端口满足空域QCL关系时，可以是下行信号的端口和下行信号的端口之间，或上行信号的端口和上行信号的端口之间的QCL关系(也可以称为spatial relation)，可以是两个信号具有相同的AoA或AoD，用于表示具有相同的接收波束或发射波束。又例如对于下行信号和上行信号间或上行信号与下行信号的端口间的QCL关系，可以是两个信号的AoA和AoD具有对应关系，或两个信号的AoD和AoA具有对应关系，即可以利用波束互易性，根据下行接收波束确定上行发射波束，或根据上行发射波束确定下行接收波束。
具有空域QCL关系的端口上传输的信号还可以理解为使用相同的空间滤波器(spatial  filter)接收或发送信号。空间滤波器可以为以下至少之一：预编码，天线端口的权值，天线端口的相位偏转，天线端口的幅度增益。
具有空域QCL关系的端口上传输的信号还可以理解为具有对应的波束对连接(beam pair link，BPL)，对应的BPL包括以下至少之一：相同的下行BPL，相同的上行BPL，与下行BPL对应的上行BPL，与上行BPL对应的下行BPL。
因此，空间接收参数(即，类型D的QCL)可以理解为用于指示接收波束的方向信息的参数。
在本申请的举例中，某些参数的对应关系也可以应用于QCL描述下的场景。
应理解，本申请中适用于QCL假设的场景，也可以是两个参考信号，进一步或者是传输对象间的关联关系。
2、传输配置指示(transmission configuration indication，TCI)状态：
TCI用于指示信号或信道的QCL信息。其中信道可以是物理下行控制信道(physical downlink control channel，PDCCH)/控制资源集合(control resource set，CORESET)或者是物理下行共享信道(physical downlink shared channel，PDSCH)。信号可以是信道状态信息参考信号(channel state information reference signal，CSI-RS)，解调参考信号(demodulation reference signal，DMRS)，TRS，同步信号广播信道块(synchronisation signal/PBCH block，SS/PBCH block)等。TCI信息是指TCI中包括的参考信号与该信道或信号满足QCL关系，主要用于指示接收信号或信道时，其空间特性参数等信息与TCI中包括的参考信号的空间特性参数等信息相同、相似或相近。
一个TCI状态(TCI state)可以配置一个或多个被引用的参考信号，及所关联的QCL类型(QCL type)。QCL类型又可以分为A/B/C/D四个类别，分别是{Doppler shift，Doppler spread，average delay，delay spread，spatial Rx parameter}的不同组合或选择。TCI状态包括QCL信息，或者TCI状态用于指示QCL信息。
TCI state的配置信息可以如下：
Figure PCTCN2020074670-appb-000001
Figure PCTCN2020074670-appb-000002
其中，qcl-Type1为第一个QCL信息，qcl-Type2第二个QCL信息，QCL-Info为qcl-Type对应的具体内容，其中，referenceSignal为满足QCL关系的参考信号，qcl-Type为具体的QCL类型，如typeA、typeB、typeC、typeD等等。
3、SS/PBCH block：
SS/PBCH block还可以称为SSB。其中，PBCH为物理广播信道(physical broadcast channel)的缩写。SSB包含主同步信号(primary synchronization signal，PSS)、辅同步信号(secondary synchronization signal，SSS)和PBCH中的至少一个。主要用于小区搜索、小区同步、承载广播信息的信号。
需要说明的是，随着技术的不断发展，本申请实施例的术语有可能发生变化，但都在本申请的保护范围之内。
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
本申请提供的数据传输方法可以应用于各类通信系统中，例如，可以是物联网(internet of things，IoT)、窄带物联网(narrow band internet of things，NB-IoT)、LTE，也可以是第五代(5G)通信系统，还可以是LTE与5G混合架构、也可以是5G NR系统以及未来通信发展中出现的新的通信系统等。本申请所述的5G通信系统可以包括非独立组网(non-standalone，NSA)的5G通信系统、独立组网(standalone，SA)的5G通信系统中的至少一种。通信系统还可以是公共陆地移动网络(public land mobile network，PLMN)网络、设备到设备(device-to-device，D2D)网络、机器到机器(machine to machine，M2M)网络或者其他网络。
图1示出一种适用本申请实施例的通信系统100。该通信系统100可以包括网络设备110、网络设备120和终端设备130。上述适用本申请实施例的通信系统仅是举例说明，适用本申请实施例的通信系统不限于此，例如，通信系统中包括的网络设备和终端设备的数量还可以是其它的数量，或者采用单基站、多载波聚合的场景、双连接的场景或D2D通信场景、协作多点传输(coordinated multi-point，CoMP)场景。其中CoMP可以为非相干联合发送(non coherent joint transmission，NCJT)、相干联合发送(coherent joint transmission，CJT)、联合发送(joint transmission，JT)等中的一种或多种场景。
本申请实施例中涉及的终端设备，是用户侧的一种用于接收或发射信号的实体。终端设备可以是一种向用户提供语音、数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。终端设备也可以是连接到无线调制解调器的其他处理设备。终端设备可以通过无线接入网(radio access network，RAN)与一个或多个核心网进行通信。终端设备也可以称为无线终端、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、用户设备(user device)、或用户装备(user equipment)等等。终端设备可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如， 可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言、数据。例如，终端设备还可以是个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。常见的终端设备例如包括：手机、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，例如智能手表、智能手环、计步器等，但本申请实施例不限于此。本申请实施例中涉及的终端设备还可以是未来演进的PLMN中出现的终端设备等，本申请实施例对此并不限定。
此外，在本申请实施例中，终端设备还可以是IoT系统中的终端设备，IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。在本申请实施例中，IoT技术可以通过例如窄带(narrow band，NB)技术，做到海量连接，深度覆盖，终端省电。
此外，在本申请实施例中，终端设备还可以包括智能打印机、火车探测器、加油站等传感器，主要功能包括收集数据(部分终端设备)、接收网络设备的控制信息与下行数据，并发送电磁波，向网络设备传输上行数据。
本申请实施例中所涉及的网络设备，是网络侧的一种用于发射或接收信号的实体。本申请实施例中的网络设备可以是无线网络中的设备，例如将终端接入到无线网络的RAN节点。例如，网络设备可以是LTE中的演进型基站(evolutional Node B，eNB或e-NodeB)，还可以是新无线控制器(new radio controller，NR controller)，可以是5G系统中的gNode B(gNB)，可以是集中式网元(centralized unit，CU)，可以是新无线基站，可以是射频拉远模块，可以是微基站，可以是中继(relay)，可以是分布式网元(distributed unit，DU)，可以是家庭基站，可以是传输接收点(transmission reception point，TRP)或传输点(transmission point，TP)或者任何其它无线接入设备，但本申请实施例不限于此。网络设备可以覆盖1个或多个小区。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
目前，无线覆盖技术主要存在3种组网方式：SFN、双频网以及多频网。其中，单频网可以实现在同一时间、使用同一频率，对于一定范围内进行信号覆盖，减少UE切换的次数。在LTE中，单频组网可以通过多个RRH-s连接到一个BBU，该多个RRH-s使用相同的小区标识(Cell ID)，连接到一个BBU上的所有RRH联合向一个UE发送数据。
LTE中连接到一个BBU上的所有RRH联合向一个UE发送数据，UE会同时接收到来自多个RRH的参考信号，根据该多个RRH的参考信号进行信道估计和时频跟踪。LTE使用CRS作为下行参考信号，CRS是小区级别的，即一个小区内的所有UE接收到相同的CRS进行信道估计和时频跟踪。因此，LTE中连接到一个BBU上的所有RRH联合向一个UE发送数据，UE会同时接收到来自多个RRH相同的参考信号。在一些高速移动的场景中，例如高铁上、动车上等，UE在利用CRS进行多普勒频谱估计时，由于所有连接到一个BBU上的RRH-s发送的CRS占用相同的固定位置的时频资源，这些RRH发送的CRS到达UE时会形成多径信号，从而会出现多普勒扩展问题，导致UE下行同步不能很好地 确定中心频率，进而降低接收数据的准确性。例如，如图2所示，终端设备在高铁上，高铁沿途部署了4个RRH，分别为RRH0～RRH3，RRH0～RRH3与同一个BBU相连接，RRH0～RRH3联合向UE发送数据，由于RRH0～RRH3发送的CRS占用相同的固定位置的时频资源，因此，RRH0～RRH3向UE发送的CRS形成4径信号，从而出现多普勒扩展问题。
此外，CRS占用固定位置的时频资源会造成一定程度的时频资源的浪费。
基于此，本申请实施例提供一种数据传输方法及装置，可以提高快速移动场景下UE接收数据的准确性。其中，方法和装置是基于同一发明构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
本申请实施例中，数据可以是指码字(codeword)、传输块(transport block)、码块(code block)、码块组(code block group)等等。
应理解，本申请实施例中“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一(项)个”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b或c中的至少一项(个)，可以表示：a，b，c，a和b，a和c，b和c，或a、b和c，其中a、b、c可以是单个，也可以是多个。
另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序，也不代表个数。
下面结合附图对本申请实施例提供的方法进行具体说明。
实施例一：参见图3，为本申请提供的一种数据传输方法的流程图，该方法可以应用于SFN组网的通信系统中，在该通信系统中多个网络设备可以使用同一频率为终端设备联合发送数据。一种示例性说明中，该多个网络设备可以为RRH，该多个网络设备接入同一个BBU。
该方法可以应用于通信设备或者芯片或者芯片组等。下面以通信设备为例进行说明，该方法包括：
S301，多个网络设备均向终端设备发送一指示信息，指示信息用于指示控制信道或数据信道的QCL信息，该QCL信息指示控制信道或数据信道与多个参考信号具有准共址关系。相应的，终端设备接收该指示信息。示例性的，该指示信息可以为TCI state，为了描述上的方便，下面将指示信息统一称为TCI state。
该指示信息可以通过一条信令发送，也可以是通过多条信令发送。
其中，该多个参考信号可以包括如下至少一项：追踪参考信号(CSI-RS for tracking，TRS)、SSB。当然，参考也可以为其他信号，这里不做具体限定。一种实现方式中，该多个参考信号可以由高层信令(如无线资源控制(radio resource control，RRC)信令)配置的。
一种示例性说明中，数据信道或者控制信道中可以包括解调参考信号(demodulation reference signal，DMRS)。其中，DMRS可以是可配置的。
一个示例，TCI state可以包括一个指示该准共址信息的配置信息，该配置信息中包括参考信号列表，参考信号列表包括多个参考信号的标识。上述方式通过在QCL信息的配 置信息包括的参考信号列表中携带多个参考信号的标识，将QCL信息与该多个参考信号关联。
示例性的，TCI state的配置信息可以为：
Figure PCTCN2020074670-appb-000003
其中，QCL-Info为指示QCL信息的配置信息，csi-rs-ResourceIdList以及ssbList为参考信号列表。若参考信号为TRS，则csi-rs-ResourceIdList包括多个TRS的标识，该多个TRS与该QCL信息关联。若参考信号为SSB，则ssbList包括多个SSB的标识，该多个SSB与该QCL信息关联。其中，csi-rs-ResourceIdList中多个TRS标识对应的TRS可以属于不同的带有trs-Info的NZP-CSI-RS-ResourceSet。ssbList中多个SSB索引对应的SSB可以对应不同的波束。
另一个示例，TCI state可以包括多个指示该准共址信息的配置信息，该多个配置信息与多个参考信号一一关联。其中，每个配置信息中包括参考信号信息，该参考信号信息包括与该配置信息关联的参考信号的标识。上述方式中，通过在TCI state中包括多个配置信息，其中，一个配置信息关联一个参考信号。该多个配置信息可以指示相同的准共址类型，例如’QCL-typeA’，但是关联不同的参考信号，从而将QCL信息与多个参考信号关联。
示例性的，TCI state可以配置：一个“type A”，其中，该“type A包括一个带有trs-Info的NZP-CSI-RS-ResourceSet中的一个CSI-RS。或者，两个“type A”，两个“type A”包括的CSI-RS资源属于两个不同的带有trs-Info的NZP-CSI-RS-ResourceSet。如果适用，TCI  state还可以配置：“type D”，该“type D”可以与“type A”包括相同的CSI-RS资源。其中，NZP-CSI-RS-ResourceSet可以通过高层信令(如RRC信令)进行配置。
一种实现方式中，步骤S301可以通过如下方式实现：针对控制信道，网络设备可以通过高层RRC配置多个TCI state。例如，针对每一个CORESET配置64个TCI state。并通过媒体介入控制控制元素(media access control control element，MAC CE)激活一个当前要用的TCI state。
另一种实现方式中，步骤S301可以通过如下方式实现：针对数据信道，网络设备可以通过高层RRC配置多个TCI state，例如，配置128个TCI state。并通过MAC CE激活至少一个TCI state。例如，当激活一个TCI state，该TCI state可以理解为当前要用的TCI state；当激活大于一个TCI state时，如激活8个TCI state，再通过下行控制信息(downlink control information，DCI)指示当前要用的TCI state。
S302，多个网络设备根据准共址信息向终端设备发送控制信道或数据信道。相应地，终端设备接收来自多个网络设备的控制信道或数据信道。
S303，终端设备根据与多个参考信号之间的准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果。
一种实现方式中，终端设备可以根据准共址信息，对多个参考信号分别进行多普勒频偏估计，得到多个参考信号分别对应的多普勒频偏估计结果。合并多个参考信号对应的多普勒频偏估计结果，得到综合的多普勒频偏估计结果。
例如，指示信息指示数据信道与TRS1、TRS2、TRS3具有type A类型的准共址关系，则终端设备可以根据type A类型，分别对TRS1、TRS2、TRS3进行多普勒频偏估计，得到TRS1的多普勒频偏估计结果、TRS2的多普勒频偏估计结果、TRS3的多普勒频偏估计结果。然后将TRS1的多普勒频偏估计结果、TRS2的多普勒频偏估计结果和TRS3的多普勒频偏估计结果进行合并，得到综合的多普勒频偏估计结果。
S304，终端设备基于综合的多普勒频偏估计结果解调控制信道或数据信道。
一种实施方式中，终端设备可以根据综合的多普勒频偏估计结果进行时频偏校准和信道估计，得到信道估计结果，并根据该信道估计结果解调控制信道或数据信道。
为了更好的理解实施例一提供的数据传输方法，下面结合具体场景对数据传输过程进行详细描述。
一种场景可以为网络设备1和网络设备2联合向UE发送数据1。应理解，这里仅是一种示例性说明，并不对数据传输过程中的网络设备的数量、参考信号的数量等进行具体限定。
如图4所示，数据传输过程可以为：
A1，网络设备1、网络设备2向UE发送DCI1，该DCI1指示TCI state，该TCI state指示数据信道的QCL信息，该QCL信息指示数据信道与TRS1、TRS2具有准共址关系。
一种示例性说明中，TCI state可以配置为：
Figure PCTCN2020074670-appb-000004
Figure PCTCN2020074670-appb-000005
其中，referenceSignal为关联的参考信号类型，这里为TRS,即CSI-RS for tracking,csi-rsResourceIdList为关联的参考信号标识列表，具体包括NZP-CSI-RS-ResourceId[1]以及NZP-CSI-RS-ResourceId[2]，NZP-CSI-RS-ResourceId[1]指TRS1，NZP-CSI-RS-ResourceId[2]指TRS2。在该示例性说明中，TCI-State还可以包括其它准共址信息，如qcl-Type2。
另一种示例性说明中，TCI state可以为：
Figure PCTCN2020074670-appb-000006
Figure PCTCN2020074670-appb-000007
其中，qcl-Type1与qcl-Type2中referenceSignal中指示关联不同的参考信号，但有相同的qcl-Type，如两个可以都是type A，qcl-Type1中指示数据信道和TRS1有准共址关系，且准共址关系为type A准共址类型，qcl-Type2中指示数据信道和TRS2有准共址关系，且准共址关系为type A准共址类型。在该示例性说明中，TCI-State还可以包括其他准共址信息，如qcl-Type3。
A2，网络设备1根据TRS1向UE发送数据1，网络设备2根据TRS2向UE发送数据1。
A3，UE根据接收到TCI state，分别对TRS1和TRS2进行多普勒频偏估计，得到TRS1的多普勒频偏估计结果和TRS2的多普勒频偏估计结果。
A4，UE合并TRS1的多普勒频偏估计结果和TRS2的多普勒频偏估计结果，得到综合的多普勒频偏估计结果。
A5，UE根据该综合的多普勒频偏估计结果进行时频偏校准和信道估计，得到信道估计结果。
A6，UE根据该信道估计结果解调数据1。
通过上述实施例一提供的方案，准共址信息与多个参考信号关联，即数据信道与多个参考信号存在准共址关系，从而终端设备可以在多径信号存在的情况下，根据多个参考信号估计出较准确的信道信息和多普勒频偏，进而可以提高信道估计的精度，如信道估计时域差值的精度等，以提升接收的性能。
实施例二：本申请提供另一种数据传输方法，该方法可以应用于SFN组网的通信系统中，在该通信系统中多个网络设备可以使用同一频率为终端设备联合发送数据。一种示例性说明中，该多个网络设备可以为RRH，该多个网络设备接入同一个BBU。为了描述上的方便，下面以RRH为例进行说明。
在该方法中，网络设备给UE配置两套或多套和不同RRH关联的TCI state,某个时刻网络设备只激活一个TCI state，并且多个RRH中只有N个RRH根据该TCI state给UE发送数据，所述N为大于或等于1的整数。下面以N等于1为例进行说明。如图5所示，数据传输过程可以为：
B1，第一RRH向终端设备发送第一DCI，该第一DCI用于激活当前要使用的第一TCI state，并根据该第一TCI state向终端设备发送数据1。
B2，终端设备根据第一TCI state对数据1进行解调。
一种实现方式中，终端设备可以根据第一TCI state进行时频偏跟踪和信道估计，并对数据1进行解调，具体的，可以进行多普勒频偏估计，得到多普勒频偏估计结果。并根据多普勒频偏估计结果进行时频偏校准和信道估计，得到信道估计结果，根据该信道估计结果解调数据1。
B3，终端设备测量第一RRH、以及一个或多个其他RRH的信道质量，其中，第一RRH以及该一个或多个其他RRH连接同一个BBU，质量参数用于表征参考信号质量的参数，如质量参数可以为参考信号接收功率(reference signal received power，RSRP)、参考信号 接收质量(reference signal received quality，RSRQ)等。
B4，终端设备向第一RRH上报质量参数集合，该质量参数集合包括第一RRH、以及一个或多个其他RRH的质量参数。
一种实现方式中，终端设备可以周期性测量上报质量参数集合。
B5，第一RRH将测量的质量参数集合发送到BBU。
B6，BBU根据终端设备上报的质量参数集合确定将为终端设备提供服务的RRH。假设，BBU确定将为终端设备提供服务的RRH由第一RRH切换为第二RRH。
一种实现方式中，BBU可以确定质量参数集合中最大的质量参数对应的RRH是为终端设备提供的RRH。
另一种实现方式中，BBU可以根据各个RRH的质量参数的历史数据确定各个RRH的质量参数变化过程，并根据变化过程确定为终端设备提供服务的RRH。例如，将质量参数逐渐变大的RRH确定是为终端设备提供服务的RRH。
又一种实现方式中，BBU可以确定质量参数集合中大于质量参数门限值的质量参数，根据这些质量参数对应的RRH的历史数据确定各个RRH的质量参数变化过程，并根据变化过程确定为终端设备提供服务的RRH。例如，将质量参数逐渐变大的RRH确定是为终端设备提供服务的RRH。
当然，BBU也可以采用其他方式确定为终端设备提供的RRH，这里不再一一列举。
B7，第二RRH向终端设备发送第二DCI，该第二DCI用于激活当前要使用的第二TCI state。其中，第二TCI state可以与第一TCI state相同，也可以与第一TCI state不同，这里不做具体限定。
一种实现方式中，BBU确定将为终端设备提供的RRH由第一RRH切换为第二RRH后，第一RRH可以停止向终端设备发送数据1。
B8，终端设备激活第二TCI state。一种实现方式中，若第二TCI state与第一TCI state相同，在步骤B7之后，可以执行步骤B9，即可以不执行步骤B8。
B9，第二RRH根据第二TCI state向终端设备发送数据1。
B10，终端设备根据第二TCI state对数据1进行解调。
终端设备根据第二TCI state对数据1进行解调的过程，与终端设备根据第一TCI state对数据1进行解调类似，相似之处不再重复赘述。
上述实施例二中，终端设备一个时刻只需跟踪一个TCI state，即只给终端设备激活一套TCI state，可以降低实现复杂度。
实施例三：本申请提供另一种数据传输方法，该方法可以应用于SFN组网的通信系统中，在该通信系统中多个网络设备可以使用同一频率为终端设备联合发送数据。一种示例性说明中，该多个网络设备可以为RRH，该多个网络设备接入同一个BBU。为了描述上的方便，下面以RRH为例进行说明。
在该方法中，网络设备给终端设备激活至少两个TCI state，并且某个时刻多个RRH中只有N个RRH向UE发送数据，所述N为大于或等于1的整数。下面以网络设备激活两个TCI state，且某个时刻多个RRH中只有1个RRH向UE发送数据为例进行说明。如图5所示，数据传输过程可以为：
C1，第一RRH向终端设备发送第一DCI，该第一DCI用于指示两个TCI state中的第一TCI state，该第一个TCI state用于当前第一RRH下的数据发送。
一种实现方式中，BBU可以通过高层RRC信令配置多个TCI state，并通过MAC CE激活其中两个TCI state。
C2～C7，具体可以参阅上述实施例二中步骤B3～B8。
C8，第二RRH向终端设备发送第二DCI，该第二DCI用于指示两个TCI state中的第二TCI state。其中，第二TCI state可以与第一TCI state相同，也可以与第一TCI state不同，这里不做具体限定。
一种实现方式中，BBU确定将为终端设备提供的RRH由第一RRH切换为第二RRH后，第一RRH可以停止向终端设备发送数据1。
C9～C10，具体可以参阅上述实施例二中步骤B9～B10。
在实施例三中，数据信道和控制信道可以使用相同的TCI state，也可以使用不同的TCI state。如果数据信道和控制信道使用相同的TCI state，则可以通过MAC-CE指示控制信道新切换的TCI state，该TCI state可以适用于数据信道和控制信道，这种实现方式中，可以配置两套关联不同TCI state的TRS。如果数据信道和控制信道使用不同的TCI states，则控制信道的TCI state可以不变，数据信道的TCI state根据具体提供服务的RRH通过DCI动态指示。
上述实施例三，终端设备在不同的覆盖范围内，能够根据不同的TCI state获取准确的多普勒频偏信息，从而可以避免多径引起的多普勒扩展问题，进而可以比较准确地估计和纠正多普勒频偏，使得UE在高速移动的过程中，可以比较准确地锁定收发数据的波束，提高接收性能。并且，上述实施例三中终端设备同时跟踪两套或两套以上TCI state，从而终端设备切换TCI state时，可以节省激活新TCI state的时间，从而在一定成度上可以避免数据传输的中断。
实施例四：本申请提供另一种数据传输方法，该方法可以应用于SFN组网的通信系统中，在该通信系统中多个网络设备可以使用同一频率为终端设备联合发送数据。一种示例性说明中，该多个网络设备可以为RRH，该多个网络设备接入同一个BBU。为了描述上的方便，下面以RRH为例进行说明。
在该方法中，网络设备激活一个TCI state，且配置的参考信号均与该TCI state关联，连接到同一个BBU的所有RRH根据该TCI state联合向终端设备发送数据。例如，RRH1、RRH2均向终端设备发送DCI1，该DCI1用于指示TCI state1。RRH1、RRH2均采用TCI state1向终端设备发送数据1，如图6所示。
实施例五：本申请提供另一种数据传输方法，该方法可以应用于SFN组网的通信系统中，在该通信系统中多个网络设备可以使用同一频率为终端设备联合发送数据。一种示例性说明中，该多个网络设备可以为RRH，该多个网络设备接入同一个BBU。为了描述上的方便，下面以RRH为例进行说明。
在该方法中，网络设备给UE可以配置多个与不同TRS关联的TCI state，不同的RRH可以通过DCI独立指示对应的TCI state并调度不同的数据。例如，RRH1通过DCI1向终端设备指示TCI state1，并采用TCI state1向终端设备发送数据1，RRH2通过DCI2向终端设备指示TCI state2，并采用TCI state2向终端设备发送数据2，如图7所示。其中，TCI state1与TCI state2可以相同，也可以不同，这里不做具体限定。
上述实施例五，通过不同的RRH可以通过DCI独立指示对应的TCI state并调度不同的数据，可以提高小区边缘用户的数据接收，进而可以提高频谱利用率。
基于与方法实施例的同一技术构思，本申请实施例提供一种数据传输装置。该数据传输装置的结构可以如图8所示，包括处理单元801以及通信单元802。
一种实现方式中，数据传输装置具体可以用于实现图3或图4的实施例中终端设备执行的方法，该装置可以是终端设备本身，也可以是终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，通信单元802，用于接收一指示信息，指示信息用于指示控制信道或数据信道的准共址信息，准共址信息指示控制信道或数据信道与多个参考信号具有准共址关系；以及，接收来自多个网络设备的控制信道或数据信道；处理单元801，用于根据与多个参考信号之间的准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果；以及，基于综合的多普勒频偏估计结果解调控制信道或数据信道。
处理单元801，在根据与多个参考信号之间的准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果时，可以具体用于：根据准共址信息，对多个参考信号分别进行多普勒频偏估计，得到多个参考信号分别对应的多普勒频偏估计结果；合并多个参考信号对应的多普勒频偏估计结果，得到综合的多普勒频偏估计结果。
示例性的，指示信息可以包括一个指示准共址信息的配置信息，配置信息中包括参考信号列表，参考信号列表包括多个参考信号的标识。
或者，指示信息也可以包括多个指示准共址信息的配置信息，其中，多个配置信息与多个参考信号一一关联。
多个参考信号可以包括如下至少一项：TRS、SSB。
另一种实现方式中，数据传输装置具体可以用于实现图3或图4的实施例中网络设备执行的方法，该装置可以是网络设备本身，也可以是网络设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，通信单元802，用于发送一指示信息，指示信息用于指示控制信道或数据信道的准共址信息，准共址信息指示控制信道或数据信道多个参考信号具有准共址关系；处理单元801，用于根据准共址信息通过通信单元802向终端设备发送控制信道或数据信道。
示例性的，指示信息可以包括一个指示准共址信息的配置信息，配置信息中包括参考信号列表，参考信号列表包括多个参考信号的标识。
或者，指示信息也可以包括多个指示准共址信息的配置信息，其中，多个配置信息与多个参考信号一一关联。
多个参考信号可以包括如下至少一项：TRS、SSB。
一种实现方式中，数据传输装置具体可以用于实现图5所示的实施例二中终端设备执行的方法，该装置可以是终端设备本身，也可以是终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，通信单元802，用于接收第一信息，第一信息用于激活一个传输配置指示TCI状态，TCI状态与一个追踪参考信号TRS资源相关联；以及，接收来自第一射频拉远头RRH的TRS，第一RRH是连接同一个基带处理单元BBU的多个RRH中当前提供服务的RRH，TRS为TRS资源对应的TRS。处理单元801，用于基于TRS进行如下至少一项：信道估计、多普勒频偏估计。
可选的，通信单元802还用于接收来自第一RRH的第二信息，第二信息用于指示由第一RRH切换到第二RRH。处理单元801，还用于由第一RRH切换到第二RRH。
可选的，处理单元801，还用于在通信单元802接收来自第一RRH的第二信息之前，针对多个RRH发送的参考信号分别进行信号质量测量，得到多个RRH分别对应的测量值。 通信单元，还用于向第一RRH上报多个RRH分别对应的测量值。
可选的，通信单元802，还用于在处理单元801由第一RRH切换到第二RRH之前，根据基于TRS进行如下至少一项：信道估计、多普勒频偏估计得到的结果，接收来自第一RRH的数据。
一种实现方式中，数据传输装置具体可以用于实现图5所示的实施例二中终端设备执行的方法，该装置可以是终端设备本身，也可以是终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，通信单元802，用于接收第一信息，所述第一信息用于激活第一TCI状态和第二TCI状态；以及，接收来自第一RRH的第一TRS以及来自第二RRH的第二TRS，所述第一RRH是连接同一个基带处理单元BBU的多个RRH中当前提供服务的RRH，所述第一TRS为所述第一TCI状态对应的TRS，所述第二TRS为所述第二TCI状态对应的TRS；处理单元801，用于基于所述第一TRS进行如下至少一项：信道估计、多普勒频偏估计，或者，在由所述第一RRH切换到所述第二RRH之后基于所述第二TRS进行如下至少一项：信道估计、多普勒频偏估计。
可选的，通信单元802，还用于在处理单元801由所述第一RRH切换到所述第二RRH之前，接收来自所述第一RRH的第二信息，所述第二信息用于指示由所述第一RRH切换到所述第二RRH。
处理单元801，还可以用于在通信单元802接收来自所述第一RRH的第二信息之前，针对所述多个RRH发送的参考信号分别进行信号质量测量，得到所述多个RRH分别对应的测量值。通信单元802，还用于向所述第一RRH上报所述多个RRH分别对应的测量值。
可选的，处理单元801，还用于在基于所述第一TRS进行如下至少一项：信道估计、多普勒频偏估计之后，根据基于所述第一TRS进行如下至少一项：信道估计、多普勒频偏估计得到的结果，通过通信单元802接收来自所述第一RRH的数据。
可选的，处理单元801，还用于在基于所述第二TRS进行如下至少一项：信道估计、多普勒频偏估计之后，根据基于所述第二TRS进行如下至少一项：信道估计、多普勒频偏估计得到的结果，通过通信单元802接收来自所述第二RRH的数据。
一种实现方式中，数据传输装置具体可以用于实现图6所示的实施例中终端设备执行的方法，该装置可以是终端设备本身，也可以是终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，通信单元802，用于执行上述实施例四中终端设备的收发动作，如接收DCI1等，处理单元801，用于执行上述实施例四中终端设备除收发动作以外的其他动作，或者，通过通信单元802收发信号，如通过通信单元802接收DCI1等。
一种实现方式中，数据传输装置具体可以用于实现图7所示的实施例中终端设备执行的方法，该装置可以是终端设备本身，也可以是终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，通信单元802，用于执行上述实施例五中终端设备的收发动作，如接收多个网络设备发送的数据等，处理单元801，用于执行上述实施例四中终端设备除收发动作以外的其他动作，或者，通过通信单元802收发信号，如通过通信单元802接收多个网络设备发送的数据等。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。可以理解的是， 本申请实施例中各个模块的功能或者实现可以进一步参考方法实施例的相关描述。
一种可能的方式中，数据传输装置可以如图9所示，该数据传输装置可以是通信设备或者通信设备中的芯片，其中，通信设备可以为终端设备，也可以为网络设备。该装置可以包括处理器901，通信接口902，存储器903。其中，处理单元801可以为处理器901。通信单元802可以为通信接口902。
处理器901，可以是一个中央处理单元(central processing unit，CPU)，或者为数字处理单元等等。通信接口902可以是收发器、也可以为接口电路如收发电路等、也可以为收发芯片等等。该装置还包括：存储器903，用于存储处理器901执行的程序。存储器903可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器903是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
处理器901用于执行存储器903存储的程序代码，具体用于执行上述处理单元801的动作，本申请在此不再赘述。通信接口902具体用于执行上述通信单元802的动作，本申请在此不再赘述。
本申请实施例中不限定上述通信接口902、处理器901以及存储器903之间的具体连接介质。本申请实施例在图9中以存储器903、处理器901以及通信接口902之间通过总线904连接，总线在图9中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图9中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本发明实施例还提供了一种计算机可读存储介质，用于存储为执行上述处理器所需执行的计算机软件指令，其包含用于执行上述处理器所需执行的程序。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包括一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如SSD)等。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (21)

  1. 一种数据传输方法，其特征在于，该方法包括：
    接收一指示信息，所述指示信息用于指示控制信道或数据信道的准共址信息，所述准共址信息指示所述控制信道或数据信道与多个参考信号具有准共址关系；
    接收来自多个网络设备的控制信道或数据信道；
    根据与所述多个参考信号之间的所述准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果；
    基于所述综合的多普勒频偏估计结果解调所述控制信道或所述数据信道。
  2. 如权利要求1所述的方法，其特征在于，根据与所述多个参考信号之间的所述准共址信息进行多普勒频偏估计，包括：
    根据所述准共址信息，对所述多个参考信号分别进行多普勒频偏估计，得到所述多个参考信号分别对应的多普勒频偏估计结果；
    合并所述多个参考信号对应的多普勒频偏估计结果，得到所述综合的多普勒频偏估计结果。
  3. 如权利要求1或2所述的方法，其特征在于，所述指示信息包括一个指示所述准共址信息的配置信息，所述配置信息中包括参考信号列表，所述参考信号列表包括所述多个参考信号的标识。
  4. 如权利要求1或2所述的方法，其特征在于，所述指示信息包括多个指示所述准共址信息的配置信息，其中，所述多个配置信息与所述多个参考信号一一关联。
  5. 如权利要求1至4任一项所述的方法，其特征在于，所述多个参考信号可以包括如下至少一项：追踪参考信号TRS、同步信号广播信道块SSB。
  6. 一种数据传输方法，其特征在于，该方法包括：
    发送一指示信息，所述指示信息用于指示控制信道或数据信道的准共址信息，所述准共址信息指示所述控制信道或数据信道与多个参考信号具有准共址关系；
    根据所述准共址信息向终端设备发送控制信道或数据信道。
  7. 如权利要求6所述的方法，其特征在于，所述指示信息包括一个指示所述准共址信息的配置信息，所述配置信息中包括参考信号列表，所述参考信号列表包括所述多个参考信号的标识。
  8. 如权利要求6所述的方法，其特征在于，所述指示信息包括多个指示所述准共址信息的配置信息，其中，所述多个配置信息与所述多个参考信号一一关联。
  9. 如权利要求6至8任一项所述的方法，其特征在于，所述多个参考信号可以包括如下至少一项：追踪参考信号TRS、同步信号广播信道块SSB。
  10. 一种数据传输装置，其特征在于，该装置包括：
    通信单元，用于接收一指示信息，所述指示信息用于指示控制信道或数据信道的准共址信息，所述准共址信息指示所述控制信道或数据信道与多个参考信号具有准共址关系；以及，接收来自多个网络设备的控制信道或数据信道；
    处理单元，用于根据与多个所述参考信号之间的所述准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果；以及，基于所述综合的多普勒频偏估计结果解调所述控制信道或所述数据信道。
  11. 如权利要求10所述的装置，其特征在于，所述处理单元，在根据与多个所述参考信号之间的所述准共址信息进行多普勒频偏估计，得到综合的多普勒频偏估计结果时，具体用于：
    根据所述准共址信息，对所述多个参考信号分别进行多普勒频偏估计，得到所述多个参考信号分别对应的多普勒频偏估计结果；
    合并所述多个参考信号对应的多普勒频偏估计结果，得到所述综合的多普勒频偏估计结果。
  12. 如权利要求10或11所述的装置，其特征在于，所述指示信息包括一个指示所述准共址信息的配置信息，所述配置信息中包括参考信号列表，所述参考信号列表包括所述多个参考信号的标识。
  13. 如权利要求10或11所述的装置，其特征在于，所述指示信息包括多个指示所述准共址信息的配置信息，其中，所述多个配置信息与所述多个参考信号一一关联。
  14. 如权利要求10至13任一项所述的装置，其特征在于，所述多个参考信号可以包括如下至少一项：追踪参考信号TRS、同步信号广播信道块SSB。
  15. 一种数据传输装置，其特征在于，该装置包括：
    通信单元，用于发送一指示信息，所述指示信息用于指示控制信道或数据信道的准共址信息，所述准共址信息指示所述控制信道或数据信道多个参考信号具有准共址关系；
    处理单元，用于根据所述准共址信息通过所述通信单元向终端设备发送控制信道或数据信道。
  16. 如权利要求15所述的装置，其特征在于，所述准共址信息的配置信息中包括参考信号列表，所述参考信号列表包括所述多个参考信号的标识。
  17. 如权利要求15所述的装置，其特征在于，所述指示信息包括多个指示所述准共址信息的配置信息，其中，所述多个配置信息与所述多个参考信号一一关联。
  18. 如权利要求15至17任一项所述的装置，其特征在于，所述多个参考信号可以包括如下至少一项：追踪参考信号TRS、同步信号广播信道块SSB。
  19. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储程序或指令，所述程序或所述指令在被一个或多个处理器读取并执行时可实现权利要求1至5任一项所述的方法，或者所述程序或所述指令在被一个或多个处理器读取并执行时可实现权利要求6至9任一项所述的方法。
  20. 一种计算机程序产品，其特征在于，当所述计算机程序产品在终端设备上运行时，使得所述终端设备执行权利要求1至5任一所述的方法；或者
    当所述计算机程序产品在网络设备上运行时，使得所述网络设备执行权利要求6至9任一所述的方法。
  21. 一种通信装置，其特征在于，包括处理器和通信接口，所述通信接口，用于接收计算机程序代码或指令并传输至所述处理器；所述处理器运行所述计算机程序代码或指令以使得所述通信装置实现如权利要求1至9任一项所述的方法。
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