WO2020143524A1 - 传输下行信道的方法和装置 - Google Patents

传输下行信道的方法和装置 Download PDF

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Publication number
WO2020143524A1
WO2020143524A1 PCT/CN2020/070070 CN2020070070W WO2020143524A1 WO 2020143524 A1 WO2020143524 A1 WO 2020143524A1 CN 2020070070 W CN2020070070 W CN 2020070070W WO 2020143524 A1 WO2020143524 A1 WO 2020143524A1
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WO
WIPO (PCT)
Prior art keywords
pdcch
tci
downlink channel
pdcchs
control information
Prior art date
Application number
PCT/CN2020/070070
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English (en)
French (fr)
Inventor
邵家枫
官磊
吕永霞
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20739088.1A priority Critical patent/EP3902182B1/en
Publication of WO2020143524A1 publication Critical patent/WO2020143524A1/zh
Priority to US17/371,532 priority patent/US20210352636A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present application relates to the communication field, and in particular to a method and device for transmitting a downlink channel in the communication field.
  • the network equipment configures a control resource set (CORESET) for detecting the physical downlink control channel (physical downlink control channel, PDCCH) through high-level signaling to obtain a transmission configuration indicator (TCI) corresponding to the PDCCH. value.
  • CORESET control resource set
  • the terminal device detects the PDCCH, it can determine the TCI corresponding to the PDCCH according to the CORSET where the PDCCH is located. Further, the network device may also configure an indication field of the TCI corresponding to the PDCCH for CORESET detecting the PDCCH.
  • TCI includes a quasi-colocation (QCL) relationship, which is a demodulation reference signal (DMRS) of one or two downlink reference signals and a downlink physical shared channel (PDSCH).
  • QCL quasi-colocation
  • DMRS demodulation reference signal
  • PDSCH downlink physical shared channel
  • the terminal device If there is no TCI indication field in the downlink control information (DCI) for scheduling PDSCH (that is, DCI carried on the PDCCH), the terminal device cannot directly determine the TCI corresponding to the PDSCH according to the TCI indication field. In this case, the terminal device may assume that the TCI of the physical downlink shared channel (PDSCH) is the same as the TCI of the PDCCH, that is, the TCI corresponding to the PDCCH carrying the DCI indicating the PDSCH is taken as the TCI of the PDSCH, and the PDSCH is performed. Data reception.
  • DCI downlink control information
  • the PDCCH can be repeatedly transmitted by multiple TRPs, so that the terminal device will receive multiple PDCCHs sent by multiple TRPs separately, the multiple PDCCHs It bears the same DCI.
  • the DCIs carried by multiple PDCCHs indicate the reception of the same PDSCH, if there is no TCI indication field in the DCI scheduling the PDSCH, how to determine the TCI corresponding to the PDSCH by the terminal device is an urgent problem to be solved.
  • the present application provides a method and device for transmitting a downlink channel, which can determine the TCI corresponding to the downlink channel, which is beneficial to improve the reliability of the downlink channel transmission.
  • a method for transmitting a downlink channel including: a terminal device receives at least two physical downlink control channels PDCCH on at least two control information resources, the downlink control information DCI carried by the at least two PDCCHs are the same, The DCI is used to indicate the time-frequency resource corresponding to the first downlink channel, the terminal device obtains at least two transmission configuration indication TCIs corresponding to the at least two control information resources, and determines the target from the at least two TCIs TCI, the target TCI is the TCI corresponding to the first downlink channel, and the terminal device receives the first downlink channel according to the DCI and the target TCI.
  • the terminal device determines from at least two TCIs according to certain rules
  • the target TCI is used for the transmission of the first downlink channel indicated by the DCI, and can solve the problem that the terminal device cannot accurately determine the TCI corresponding to the first downlink channel when there are multiple control information resources corresponding to multiple TCIs It is helpful to improve the reliability of downlink channel transmission, thereby improving system performance.
  • the first downlink channel may be a PDSCH, a PDCCH, or any other downlink channel.
  • the above control information resources are used to represent time-frequency domain resources used for transmission of the PDCCH, for example, a control resource set (control-resource set, CORESET), or other time-frequency domain resources used to carry the PDCCH.
  • the above control information resource may overlap with the time-frequency resource and/or frequency domain resource where the first downlink channel is located, or may not overlap.
  • the control information resource may also overlap with the time-frequency resource and/or frequency-domain resource where the uplink channel is located.
  • the present application does not limit the time-frequency resource and the frequency-domain resource of the control information resource.
  • the determining, by the terminal device, the target TCI from the at least two TCIs includes: according to at least one of the following information, the terminal device Determine the target TCI from the two TCIs: the identifier of the search space where the at least two PDCCHs are located; or, the type of search space where the at least two PDCCHs are located; or, the detection period corresponding to the at least two PDCCHs; or , The number of control information resources corresponding to the at least two PDCCHs; or, the time domain position of the control information resources corresponding to the at least two PDCCHs; or, the candidate PDCCH indexes corresponding to the at least two PDCCHs; or, The control resource element CCE index corresponding to the at least two PDCCHs; or, the resource element group REG index corresponding to the at least two PDCCHs; or, the wireless network temporary identification RNTI corresponding to the at least two PDCCHs; or, the at
  • the first network device and the terminal device may determine the target TCI in an implicit manner according to certain rules. In this way, the first network device and the terminal device can accurately determine the target TCI, improve the reliability of the first downlink channel transmission, and can also increase the DCI demodulation performance without increasing the number of DCI bits sent by the network device to the terminal device.
  • the terminal device can also make a comprehensive judgment in combination with the above-mentioned multiple situations to ensure that a TCI is finally selected as the target TCI.
  • the method for combining multiple situations is described in detail below. The method may include the following steps:
  • Step 1 The terminal device determines candidate TCI according to situation A;
  • Step 2 If the candidate TCI includes a TCI, the terminal device determines the candidate TCI as the target TCI. If the candidate TCI includes multiple TCIs, the terminal device no longer considers the situation corresponding to step one, and can then determine a new candidate TCI from the candidate TCI according to a case B other than the situation corresponding to step one. If the candidate TCI includes multiple TCIs, step 1 is re-executed until a unique target TCI is determined. It can be understood that each case is used only once to screen candidate TCIs, and after one use, one or more of other cases where no judgment is made are used to determine candidate TCIs.
  • case A is different from case B.
  • the method before the terminal device determines the target TCI from the at least two TCIs, the method further includes: the terminal device receives high-level signaling.
  • the high layer signaling is used to indicate the target TCI.
  • the target TCI corresponding to the first downlink channel may be indicated to the terminal device in a display manner.
  • the first network device may send high-layer signaling to the terminal device to indicate the target TCI, but it should be understood that the target TCI is still one of the at least two TCIs. Since the target TCI (ie, the first TCI) corresponds to the first control information resource, this is equivalent to semi-statically configuring the first control information resource corresponding to the first downlink channel for the terminal device, that is, semi-statically configuring the first network device to the terminal
  • the device sends the first downlink channel.
  • the high-level signaling is sent by the first network device to the terminal device, but it should be understood that in a specific implementation, the high-level signaling may also be sent to the terminal device by other network devices or nodes.
  • This application The embodiment does not limit this.
  • the above high-level signaling may be configured for the serving cell, may be configured for the HARQ process number, may also be configured for the codeword, or may be configured for the DCI, which is not limited in the embodiment of the present application.
  • the DCI does not carry indication information indicating the TCI corresponding to the first downlink channel.
  • the first control information resource among the at least two control information resources is not configured to indicate the TCI corresponding to the first downlink channel; or, the format of the first DCI is the first format
  • the first format is DCI format 1_0; or, any one of the at least two control information resources is not configured to indicate the TCI corresponding to the first downlink channel; or, the at least two
  • the last control information resource among the control information resources is not configured to indicate the TCI corresponding to the first downlink channel; or, multiple control information resources among the at least two control information resources are not configured to Indication information indicating the TCI corresponding to the first downlink channel.
  • the above-mentioned first control information resource may be understood as the control information resource with the earliest start symbol, and/or the end symbol in the time domain, and/or slot index. If the start symbol and/or end symbol and/or time slot index of at least two control information resources are the same, then the first control information resource can be understood as the control information with the smallest frequency domain resource (such as REG or CCE index) Resources.
  • the time difference between the transmission time of the PDCCH corresponding to the target TCI and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel needs to be greater than or equal to a scheduling threshold, which is referred to as the first threshold in this application . Therefore, the time difference between the transmission time of the PDCCH corresponding to the target TCI selected by the terminal device and the transmission time of the first downlink channel needs to be greater than or equal to the first threshold.
  • the first threshold may be defined in advance, or may be configured by the network device for the terminal device through signaling, or may be reported by the terminal device, which is not limited in this embodiment of the present application.
  • the time difference between the transmission time of the last transmitted PDCCH of the at least two PDCCHs and the transmission time of the first downlink channel is greater than or equal to the first Two thresholds; or, the time difference between the transmission time of the first transmitted PDCCH and the transmission time of the first downlink channel in the at least two PDCCHs is greater than or equal to the second threshold.
  • the second threshold may be equal to the first threshold.
  • the second threshold may be pre-defined, or may be configured by the network device for the terminal device through signaling, or may be reported by the terminal device, which is not limited in this embodiment of the present application. .
  • the above-mentioned first transmission can be understood as the transmission of the PDCCH using the control information resource with the earliest start symbol in the time domain, and/or the earliest stop symbol, and/or the smallest slot index. If the start symbol, and/or the end symbol, and/or the slot index of at least two control information resources are the same, the first transmission can be understood as the control information with the smallest frequency domain resource (such as REG or CCE index) Resource transmission PDCCH.
  • the above-mentioned last transmission can be understood as the transmission of the PDCCH using the control symbol resource with the latest start symbol in the time domain, and/or the latest stop symbol, and/or the largest slot index. If the start symbol, and/or end symbol, and/or index of at least two control information resources are the same, the first transmission can be understood as the transmission of the control information resource with the largest frequency domain resource (such as REG or CCE index) PDCCH.
  • the method further includes: the terminal device sends capability information, where the capability information is used to indicate that the terminal device can receive at least two PDCCHs; and/ Or, the terminal device receives first configuration information, and the first configuration information is used to configure the terminal device to receive at least two PDCCHs.
  • the network device may send the first configuration information to the terminal device based on the capability information reported by the terminal device, or may not send the first configuration information to the terminal device based on the capability information reported by the terminal device (or when the terminal device does not report capability information).
  • Configuration information It should be understood that the repetition times of the at least two PDCCHs may be configured by high-layer signaling or may be pre-defined.
  • the terminal device reports capability information to the network device, which can enable the network device to flexibly configure whether to perform PDCCH repeated transmission according to requirements, thereby flexibly adapting to multiple different scenarios.
  • the terminal device determining the target TCI from the at least two TCIs includes: if at least one of the following conditions is met, the terminal device Determining the target TCI from the at least two TCIs: the RNTI scrambling the at least two PDCCHs is the first RNTI; or, the search space corresponding to the at least two PDCCHs is the first search space; or, the DCI The format of is the first DCI format; or, the at least two control information resources belong to the first control information resource group; or, the bit state of the priority bit field of the DCI is the first bit state.
  • the terminal device may determine the TCI corresponding to the first downlink channel by using the method of the embodiment of the present application only when at least one of the above conditions is satisfied.
  • the above-mentioned first RNTI, first search space, first format, or first control information resource group, or first bit state may be pre-defined, or may be configured by the network device to the terminal device through higher layer signaling.
  • the method further includes: the terminal device receives second configuration information, where the second configuration information is used to configure the first RNTI, the first At least one of a search space, the first DCI format, or the first control information resource group, or the bit state of the priority bit field of the DCI.
  • the terminal device may also determine whether to use the method of the embodiment of the present application to determine the TCI corresponding to the first downlink channel according to the time-frequency resource of the first downlink channel indicated by DCI. Specifically, the terminal device may determine the target TCI from at least two TCIs using the method of the embodiment of the present application when the time-frequency resources of the first downlink channel satisfy at least one of the following conditions: first downlink The channel resource index belongs to the first index set; or, the time domain resource length of the first downlink channel belongs to the first time domain length; or, the transmission time offset of the transmission time of the first downlink channel belongs to the first offset Quantity collection.
  • the DCI includes first indication information, and the first indication information is used to indicate one of the at least two TCIs; the terminal device Determining the target TCI in the at least two TCIs includes: the terminal device determining the target TCI according to the first indication information.
  • the network device may introduce a 1-bit indication field in the DCI, or let the TCI indication field be 1 bit to indicate the target TCI.
  • the TCI indication field For example, 0 is used to indicate that the target TCI is the first TCI corresponding to the first control information resource, and 1 is used to indicate that the target TCI is the second TCI corresponding to the second control information resource; or, 1 is used to indicate that the target TCI is the first control
  • the first TCI corresponding to the information resource 0 is used to indicate that the target TCI is the second TCI corresponding to the second control information resource.
  • the terminal device may directly determine the target TCI corresponding to the first downlink channel according to the 1-bit indication field in the DCI.
  • another method for transmitting a downlink channel includes: the first network device determines the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel, and according to the target TCI and the first information The corresponding relationship between them, to determine the first information corresponding to the PDCCH, the first network device sends the PDCCH on the control information resource according to the first information and the target TCI, and the PDCCH carries downlink control Information DCI; the first network device sends the first downlink channel according to the DCI and the target TCI.
  • the first information is at least one of the following information: the identifier of the search space where the PDCCH is located; or, the type of the search space where the PDCCH is located Or, the detection period corresponding to the PDCCH; or, the number of control information resources corresponding to the PDCCH; or, the time domain position of the control information resources corresponding to the PDCCH; or, the candidate PDCCH index corresponding to the PDCCH; Or, the CCE index of the control resource element corresponding to the PDCCH; or, the REG index of the resource element group corresponding to the PDCCH; or, the wireless network temporary identifier RNTI corresponding to the PDCCH; or, the transmission time of the PDCCH and the The time difference between the transmission times of the first downlink channel; or, the indexes of the control information resources of the at least two PDCCHs; or, the indexes of the at least two TCIs.
  • the DCI does not carry indication information indicating the TCI corresponding to the first downlink channel.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the method further includes: the first network device receives capability information, where the capability information is used to indicate that the terminal device can receive at least two PDCCHs; and/ Or, the first network device sends first configuration information, where the first configuration information is used to configure the terminal device to receive at least two PDCCHs.
  • the first network device determining the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel includes: when the following conditions are met
  • the method further includes: the first network device sends second configuration information, where the second configuration information is used to configure the first RNTI, At least one of the first search space, the first DCI format, or the first control information resource group, or the bit state of the priority bit field of the DCI.
  • another method for transmitting a downlink channel includes: the first network device determines the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel; the first network device sends a high-level letter Let the high-level signaling be used to indicate the target TCI; the first network device sends the PDCCH on the control information resource according to the target TCI, the PDCCH carries downlink control information DCI; the first The network device sends the first downlink channel according to the DCI and the target TCI.
  • the DCI does not carry indication information indicating the TCI corresponding to the first downlink channel.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the method further includes: the first network device receives capability information, where the capability information is used to indicate that the terminal device can receive at least two PDCCHs; and/ Or, the first network device sends first configuration information, where the first configuration information is used to configure the terminal device to receive at least two PDCCHs.
  • the first network device determining the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel includes: when the following conditions are met
  • the method further includes: the first network device sends second configuration information, where the second configuration information is used to configure the first RNTI, At least one of the first search space, the first DCI format, or the first control information resource group, or the bit state of the priority bit field of the DCI.
  • another method for transmitting a downlink channel including: the first network device determines the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel; A target TCI, sending the PDCCH on a control information resource, the PDCCH carries downlink control information DCI, the DCI carries first indication information, and the first indication information is used to indicate the target TCI; the first The network device sends the first downlink channel according to the DCI and the target TCI.
  • an apparatus for transmitting a downlink channel has a function of implementing terminal device behavior in the above method.
  • the functions can be realized by hardware, or can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the module may be software and/or hardware.
  • the structure of the device includes a receiver and a processor, the receiver is configured to support the device to receive at least two physical downlink control channels PDCCH on at least two control information resources, and Receive the first downlink channel according to the DCI and the target TCI determined by the processor.
  • the processor obtains at least two transmission configuration indication TCIs corresponding to the at least two control information resources, and determines a target TCI from the at least two TCIs.
  • another apparatus for transmitting a downlink channel has a function of implementing network device behavior in the above method.
  • the functions can be realized by hardware, or can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the device structure includes a processor and a transmitter, and the processor is configured to support the network device to perform the corresponding function in the foregoing method.
  • the transmitter is used to support communication between a network device and a terminal device, for example, according to the first information and the target TCI determined by the processing unit, the PDCCH is sent on a control information resource, and the PDCCH Carrying downlink control information DCI.
  • the network device may further include a memory for coupling with the processor, which stores necessary program instructions and data of the network device.
  • an embodiment of the present application further provides a computer-readable storage medium, including: computer software instructions; when the computer software instructions run in an information indicating device, the device for transmitting a downlink channel performs the above various aspects or A method in any possible implementation manner of various aspects.
  • an embodiment of the present application further provides a computer program product containing instructions.
  • the computer program product runs in an information indicating device, the device for transmitting a downlink channel performs any of the above aspects or any of the above aspects Possible implementation methods.
  • an embodiment of the present application provides a chip system.
  • the chip system includes a processor, and may further include a memory, configured to implement the functions of the network device or the terminal device in the above method.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • an embodiment of the present application further provides a communication system including the terminal device described in the third aspect or a device that supports the terminal device to transmit a downlink channel for implementing the method described in the first aspect, and a fourth The network device described in the aspect or the device supporting the network device to implement the downlink channel transmission method of the second aspect;
  • the names of the terminal device, the network device, and the device for transmitting the downlink channel do not limit the device itself. In actual implementation, these devices may appear under other names. As long as the functions of each device are similar to the embodiments of the present application, they fall within the scope of the claims of the present application and their equivalent technologies.
  • FIG. 1 shows a schematic diagram of an application scenario of an embodiment of the present application
  • FIG. 2 shows a schematic flowchart of a method for transmitting a downlink channel according to an embodiment of this application
  • FIG. 3 shows a schematic block diagram of an apparatus for transmitting a downlink channel according to an embodiment of this application
  • FIG. 4 shows a schematic block diagram of another apparatus for transmitting a downlink channel according to an embodiment of the present application
  • FIG. 5 shows a schematic block diagram of a network device according to an embodiment of this application.
  • FIG. 6 shows a schematic block diagram of a terminal device according to an embodiment of the present application.
  • GSM global mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code division Multiple access
  • GRS general packet radio service
  • LTE long-term evolution
  • FDD frequency division duplex
  • TDD LTE time division duplex
  • UMTS Universal Mobile Telecommunication System
  • GSM global system for mobile communications
  • WiMAX Worldwide Interoperability for Microwave Access, WiMAX
  • the terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or User device.
  • Terminal devices can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, PDAs), wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or public land mobile communications networks (PLMN) in the future evolution
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • PDAs personal digital assistants
  • the terminal device, or the terminal device in the NR communication system, etc. is not limited in this embodiment of the present application.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be referred to as wearable smart devices. It is a general term for applying wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions that do not depend on smartphones, such as smart watches or smart glasses, and only focus on a certain type of application functions, and need to cooperate with other devices such as smartphones Use, such as various smart bracelets and smart jewelry for sign monitoring.
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a global mobile communication (global system for mobile communications, GSM) system or code division multiple access (Code Division Multiple Access, CDMA)
  • the base station (base transceiver) (BTS) in the system can also be the base station (NodeB, NB) in the wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, or the evolved base station (evolved) in the LTE system NodeB, eNB or eNodeB), can also be a wireless controller in the cloud radio access network (cloud-radio access network, C-RAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device As well as network equipment in the future 5G network or network equipment in the future evolved PLMN network, or a new generation base station (new NodeB, gNodeB) in the NR system, etc., the embodiments of the present application are
  • the network device provides services for the cell
  • the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources or spectrum resources) used by the cell
  • the cell may be a network device (for example, a base station )
  • the corresponding cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here can include: urban cell (metro cell), micro cell (micro cell), and pico cell (pico cell) ), femtocells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes central processing unit (CPU), memory management unit (memory management unit, MMU), and memory (also called main memory) and other hardware.
  • the operating system may be any one or more computer operating systems that implement business processes through processes, for example, a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system.
  • the application layer includes browser, address book, word processing software, instant messaging software and other applications.
  • the embodiment of the present application does not specifically limit the specific structure of the execution body of the method provided in the embodiment of the present application, as long as it can run the program that records the code of the method provided by the embodiment of the present application to provide according to the embodiment of the present application
  • the method may be used for communication.
  • the execution body of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call a program and execute the program.
  • the term "article of manufacture” as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
  • the computer-readable medium may include, but is not limited to: magnetic storage devices (for example, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (for example, compact discs (CDs), digital universal discs (digital discs, digital discs, DVDs)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • Enhanced Mobile Broadband eMBB
  • High-Reliability and Low-Latency Communication Ultra-Reliable and Low
  • mMTC Mass Machine-Type Communications
  • Typical URLLC services are: wireless control in industrial manufacturing or production processes, motion control of driverless cars and drones, and haptic interaction applications such as remote repair and remote surgery. The main characteristics of these services are the requirements for ultra-high reliability Performance, low latency, less data transmission and burstiness.
  • Typical mMTC services are: smart grid distribution automation, smart cities, etc. The main features are the large number of networked devices, the small amount of data transmitted, and the data is insensitive to transmission delay. These mMTC terminals need to meet low cost and very long standby The need for time.
  • Typical eMBB services are: ultra high-definition video, augmented reality (augmented reality, AR), virtual reality (virtual reality, VR), etc. The main characteristics of these services are large data transmission volume and high transmission rate.
  • the NR system supports various time scheduling units, and the length may be one or more time domain symbols.
  • the time domain symbol may be an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM).
  • OFDM orthogonal frequency division multiplexing
  • the OFDM symbol may use transform precoding or may not use transform precoding. If the OFDM symbol uses conversion precoding, it can also be called single carrier frequency division multiplexing (SC-FDM).
  • SC-FDM single carrier frequency division multiplexing
  • the NR system is composed of slots, and a slot can include 14 symbols.
  • the NR system also supports multiple subcarrier spacing. The length of time corresponding to the slot may be different at different subcarrier intervals. For example, when the subcarrier spacing is 15 kHz, the time length corresponding to a slot can be 1 ms.
  • the time length corresponding to one slot may be 0.5 ms.
  • the time length corresponding to one slot may be 0.25 ms.
  • the time length corresponding to a slot may be 0.125 ms. It should be understood that, since the number of symbols in a time slot can be configured as a fixed value, for example, 14 symbols, the length of time corresponding to the symbols can also vary with the change of the subcarrier interval.
  • the time-frequency domain resources include time-domain resources and/or frequency-domain resources.
  • the frequency domain resource may be one or more resource blocks (RB), one or more resource units (RE), one or more carriers/cells, or one or more Multiple partial bandwidths (BWP) can also be one or more RBs on one or more BWPs on one or more carriers, or one or more BWPs on one or more carriers One or more REs on one or more RBs.
  • the time domain resource may be one or more time slots, or one or more symbols on one or more time slots.
  • both uplink data transmission terminal equipment sending data to network equipment
  • downlink data transmission network equipment sending data to terminal equipment
  • the terminal device For downlink transmission, if it is based on dynamic scheduling, the terminal device will receive the downlink control information DCI used to indicate the PDSCH, and this DCI will carry indication information indicating the time-frequency domain resources and modulation methods occupied by the PDSCH . After receiving the DCI, the terminal device can determine on which resource to receive the PDSCH. Further, after receiving the PDSCH, the terminal device may feed back the final decoding result to the network device. Among them, if the terminal device receives the PDSCH correctly, the feedback information is an acknowledgment (ACK), and if the terminal device receives the PDSCH incorrectly, the feedback information is a negative acknowledgment (NACK).
  • ACK acknowledgment
  • NACK negative acknowledgment
  • the above ACK and NACK can be collectively referred to as hybrid automatic repeat request (HARQ) information in the communication system.
  • HARQ hybrid automatic repeat request
  • the terminal device will feed back the HARQ information corresponding to the PDSCH, so that the network device can quickly retransmit the terminal device after learning that the terminal device received the error in order to ensure the reliability of data transmission.
  • Control resource element control-channel element, CCE
  • a PDCCH channel is composed of one or more CCEs.
  • the determination of a PDCCH is specifically composed of several CCEs, which are described by aggregation levels. Exemplarily, the correspondence between CCE and aggregation level may be as shown in Table 1.
  • Aggregation level Control the number of resource elements 1 1 2 2 4 4 8 8 16 16
  • a CCE can be composed of 6 resource unit groups REG.
  • the resource corresponding to one REG is one RB in the frequency domain and one OFDM symbol in the time domain.
  • the REG count is in the time domain and then the frequency domain, that is, REG0 starts from the first symbol where CORESET is located and the smallest resource block.
  • CCE can be understood as a logical resource and REG as an actual resource. There are many ways to map from logical resources to actual resources. However, for a specific CORESET, the CORESET only corresponds to a CCE to REG mapping method.
  • Control resource set (control resource, CORESET)
  • a CORESET is a physical resource that contains multiple REGs.
  • a CORESET can occupy 1, 2, or 3 symbols in the time domain, and one or more resource blocks in the frequency domain.
  • CORESET is configured through high-level signaling.
  • One CORESET may include multiple search spaces, and one search space may correspond to at least one CORESET.
  • a transmission configuration indicator can be configured for a CORESET through a pre-defined method or a configuration by a network device through high-level signaling. The terminal device may determine the TCI corresponding to the PDCCH according to the CORESET where the PDCCH is located.
  • the terminal device can monitor one or more search spaces to obtain the corresponding DCI, and the identifier of each search space is associated with a CORESET identifier.
  • the search space can generally be divided into: common search space (common search space (CSS)) and user-specific search space (UE-specific search space (USS).
  • CCS common search space
  • USS user-specific search space
  • a set of candidate PDCCHs that a terminal device can monitor is defined as a PDCCH search space set (search space set).
  • the types of a search space set may include: a common search space set (common search space set) and a user-specific search space set (UE-specific search space set).
  • the common search space set may include: Type 0-PDCCH common search space set, Type0A-PDCCH common search space set, Type 1-PDCCH common search space set, Type 2-PDCCH common search space set, Type 3-PDCCH common Search space collection, etc.
  • Wireless network identifier radio network identifier, RNTI
  • Each PDCCH uses RNTI to scramble the cyclic redundancy check (CRC) of the PDCCH, and the terminal device can also distinguish different PDCCHs through the RNTI.
  • CRC cyclic redundancy check
  • RNTI may include: system information RNTI (system information RNTI, SI-RNTI), random access RNTI (random access RNTI, RA-RNTI), temporary cell RNTI (temporary cell RNTI, TC-RNTI), paging RNTI (paging RNTI) , P-RNTI), cell RNTI (cell-RNTI, C-RNTI), configured scheduling RNTI (configured scheduling-RNTI, CS-RNTI), modulation coding method cell RNTI (modulation and coding scheme RNTI, MCS-C-RNTI) and many more.
  • the CRC of the PDCCH in the user-specific search space set can only be scrambled by C-RNTI, CS-RNTI, and MCS-C-RNTI.
  • the DCI format may include: DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, DCI format 0_2, etc.
  • the number of bits corresponding to DCI format 1_2 is smaller than the number of bits corresponding to DCI format 1_0, for example, less than or equal to 10 bits-16 bits.
  • the number of bits corresponding to DCI format 0_2 is less than the number of bits corresponding to DCI format 0_0, for example, less than or equal to 10 bits-16 bits.
  • Transmission configuration indicator (transmission configuration indicator, TCI)
  • a TCI includes a quasi-co-location (QCL) relationship. This relationship is a correspondence between one or two downlink reference signals and the demodulation reference signal DMRS of the downlink physical shared channel PDSCH.
  • the TCI status indication field is an indication field used to indicate TCI. This indication field may be in DCI or in MAC layer signaling.
  • the above quasi-co-location relationship can be one of the following types:
  • QCL-Type A The terminal equipment assumes ⁇ Doppler frequency shift (doppler shift), Doppler spread (doppler spread), average delay between the downlink reference signal and the DMRS of the PDSCH at this time (average delay), delay spread (delay spread) are the same.
  • QCL-Type B The terminal equipment assumes that the ⁇ Doppler frequency shift, Doppler spread ⁇ between the downlink reference signal and the DMRS of the PDSCH is the same at this time.
  • QCL-Type C The terminal equipment assumes that the ⁇ average delay, delay spread ⁇ between the downlink reference signal and the DMRS of the PDSCH is the same at this time.
  • QCL-Type D The terminal equipment assumes that the ⁇ spatial receiving antenna parameter (spatial Rx parameter) ⁇ between the downlink reference signal and the DMRS of the PDSCH is the same at this time.
  • high-level signaling may include high-level signaling trs-info and high-level signaling repetition.
  • the high-level signaling trs-info is used to indicate that the antenna ports corresponding to all NZP CSI-RS resources in a CSI-RS resource set are the same.
  • the high-level signaling repetition is used to indicate on or off. If the high-level signaling repetition indicates off or The network is not prepared to send high-level signaling repetition to the terminal device, so the terminal device will not assume that all NZP CSI-RS resources in the resource set correspond to the same number of antenna ports and the same downlink spatial transmission filter.
  • the TCI status indication field can indicate the QCL type according to the correspondence shown in Table 2:
  • the TCI status indication field can indicate the QCL type according to the corresponding relationship shown in Table 3:
  • the TCI status indication field can indicate the QCL type according to the corresponding relationship shown in Table 4:
  • the TCI status indication field can indicate the QCL type according to the corresponding relationship shown in Table 5:
  • the TCI status indication field can indicate the QCL type according to the correspondence shown in Table 6:
  • the second downlink reference signal not configured as an example, only the columns corresponding to the TCI status indication field, the first downlink reference signal, and the QCL type corresponding to the first downlink reference signal exist in Tables 2 to 6.
  • the multiple TRPs may be ideal backhauls or non-ideal backhauls.
  • ideal backhaul is that there is no delay in the interaction information between multiple TRPs, that is, the data or control information can be quickly and arbitrarily exchanged between the multiple TRPs at any time;
  • non-ideal backhaul is that the interaction information between multiple TRPs is delayed , That is, information cannot be quickly exchanged between the multiple TRPs, or only slowly.
  • a typical multi-TRP transmission scenario may be: multiple TRPs send a PDCCH carrying the same DCI, and one of the multiple TRPs sends a PDSCH.
  • the PDSCH transmission comes from one of the TRPs (for example, the signal to noise interference (signal to interference plus SNR) TRP is the best TRP), so that the PDSCH can use the appropriate spectrum efficiency and can also ensure the reliability of the PDSCH transmission .
  • FIG. 1 shows an application scenario 100 of an embodiment of the present application.
  • the application scenario 100 may include a first network device 110, a second network device 120, and a terminal device 130.
  • the first network device 110 may send PDCCH 1 to the terminal device 130, and the PDCCH 1 carries DCI 1, which is used to indicate the first downlink channel (for example, PDSCH, which may be one or more transport blocks, or Is one or more codewords) corresponding to time-frequency resources.
  • the second network device 120 may send a PDCCH 2 to the terminal device 130, and the PDCCH 2 also carries DCI 1, indicating the same time-frequency resource of the first downlink channel. In this case, DCI is repeatedly transmitted, that is, PDCCH 1 and PDCCH 2 carry the same content.
  • the above-mentioned PDCCH 1 and PDCCH 2 may be sent on the same time-frequency resource, or may be sent on different time-frequency resources, which is not limited in the embodiment of the present application.
  • the terminal device 130 may receive the PDCCH 1 from the first network device 110 and the PDCCH 2 from the second network device 120 on the same or different time-frequency domain resources.
  • the terminal device 130 may decode the subsequent first downlink channel from the first network device 110 according to the indication information in the DCI 1, and then obtain the decoding result of the first downlink channel.
  • FIG. 1 exemplarily shows two network devices and one terminal device.
  • the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. This is not limited in the embodiments of the present application.
  • the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, etc. The embodiments of the present application are not limited thereto.
  • the network device configures a TCI value for the control information resource for detecting the PDCCH through high-level signaling.
  • the TCI corresponding to the PDCCH can be determined according to the CORSET where the PDCCH is located.
  • the network device may also configure a TCI indication field for CORESET that detects the PDCCH.
  • the terminal device can determine the TCI corresponding to the first downlink channel indicated by the DCI carried by the PDCCH according to a TCI indication field in the DCI carried by the PDCCH.
  • the terminal device cannot determine the first TCI corresponding to the downlink channel.
  • the terminal device may assume that the TCI of the first downlink channel is the same as the TCI of the PDCCH, that is, the TCI of the PDCCH is used as the TCI of the first downlink channel to receive the data of the first downlink channel.
  • DCI is repeatedly transmitted by multiple network devices through multiple PDCCHs, and the first downlink channel comes from one or more network devices in the multiple network devices (For example, the first network device 110)
  • the terminal device receives multiple PDCCHs respectively sent by multiple network devices, and the multiple PDCCHs carry the same DCI.
  • multiple PDCCHs can be used to indicate the reception of the same first downlink channel. Since the spatial address positions of multiple network devices to terminal devices are different, the TCI corresponding to different network devices may be different. Different network devices may send PDCCHs on different CORESETs, and these CORESETs are configured to correspond to different TCIs.
  • the terminal device receives the PDCCH sent from multiple network devices through different CORESET. At this time, the terminal device cannot determine the TCI corresponding to the first downlink channel, and thus cannot accurately receive the first downlink channel, which affects The reliability of the first downlink channel transmission.
  • an embodiment of the present application proposes a new method for transmitting a downlink channel.
  • the terminal device determines the target TCI from multiple TCIs corresponding to multiple different CORESETs according to a certain rule or an instruction of the network device.
  • the transmission of the above-mentioned first downlink channel is beneficial to improve the reliability of the downlink channel transmission, thereby improving the system performance.
  • FIG. 2 shows a schematic flowchart of a method 200 for transmitting a downlink channel according to an embodiment of the present application.
  • the method 200 can be applied to the application scenario 100 shown in FIG. 1, but the embodiments of the present application are not limited thereto.
  • the first network device determines the first TCI corresponding to the first PDCCH as the target TCI.
  • the first network device sends a first PDCCH on the first control information resource, where the first PDCCH carries DCI.
  • the first DCI which is used to indicate the time-frequency resource corresponding to the first downlink channel.
  • the TCI corresponding to the first downlink channel indicated by the first DCI is the target TCI.
  • the second network device sends a second PDCCH on the second control information resource, where the second PDCCH carries the first DCI.
  • the terminal device may receive at least two physical downlink control channels PDCCH on at least two control information resources, the at least two PDCCHs include the first PDCCH and the first PDCCH sent by the first network device on the first control information resource.
  • the second PDCCH sent by the second network device on the second control information resource, and the DCIs carried by the at least two PDCCHs are the same, and are all the first DCI.
  • the terminal device may receive at least two PDCCHs sent by at least two network devices on at least two control information resources, thereby acquiring at least two TCIs corresponding to the at least two control information resources.
  • the terminal device determines a target TCI from the at least two TCIs, where the target TCI is the TCI corresponding to the first downlink channel.
  • S210 is before S220, but the execution of S230 may be before S220, after S220, or simultaneously with S220. This embodiment does not limit the order of S220 and S230.
  • the method further includes: the first network device may determine the first information corresponding to the first PDCCH according to the correspondence between the target TCI and the first information; The first information and the target TCI send the first PDCCH on the first control information resource.
  • the terminal device may determine the target TCI from the at least two TCIs according to the first information. That is, the first network device and the terminal device may determine the target TCI in an implicit manner according to the first information.
  • the first information may be predefined, or may be configured by the network device for the terminal device through signaling.
  • the method further includes: the first network device sends high-layer signaling, and the high-layer signaling is used to indicate the target TCI.
  • the terminal device receives the high-layer signaling sent by the first network device.
  • the terminal device may directly determine the target TCI according to the high-layer signaling.
  • the terminal device determines from at least two TCIs according to certain rules
  • the target TCI is used for the transmission of the first downlink channel indicated by the DCI, and can solve the problem that the terminal device cannot accurately determine the TCI corresponding to the first downlink channel when there are multiple control information resources corresponding to multiple TCIs It is helpful to improve the reliability of downlink channel transmission, thereby improving system performance.
  • the first network device or the second network device may send the first downlink channel to the terminal device according to the first DCI and the target TCI (for example, the TCI corresponding to the first control information resource); correspondingly, the The terminal device may receive the first downlink channel according to the first DCI and the target TCI.
  • the network device that sends the first downlink channel here may be one network device or multiple network devices, which is not limited in this embodiment of the present application.
  • the first network device may send indication information indicating the target TCI to the The second network device, so that the second network device sends the first downlink channel according to the target TCI.
  • the following uses at least two network devices including a first network device and a second network device as an example for description.
  • the embodiment of the present application does not limit the number of network devices that repeatedly transmit the PDCCH.
  • the first network device and the second network device send PDCCHs that both carry the same DCI (ie, the first DCI) to the terminal device.
  • the first DCI is used to indicate the time-frequency resource corresponding to the first downlink channel, but the first DCI does not carry an indication field used to indicate the TCI of the first downlink channel.
  • the first network device and the second network device will pre-negotiate the correspondence between the first PDCCH (that is, the corresponding first control information resource) sent by the first network device to the first network device.
  • the first TCI is determined as the target TCI. It should be understood that, due to different spatial locations of multiple network devices to terminal devices, different network devices correspond to different TCIs.
  • the first PDCCH is sent on the first control information resource
  • the TCI corresponding to the first control information resource is the first TCI
  • the second PDCCH is sent on the second control information resource
  • the second control The TCI corresponding to the information resource is a second TCI different from the first TCI.
  • the terminal device will receive the first PDCCH from the first network device and the second PDCCH from the second network device.
  • the first PDCCH is sent on the first control information resource
  • the second PDCCH is sent on the second control information resource
  • the first control information resource corresponds to the first TCI
  • the second control information resource corresponds to the second TCI. Therefore, after receiving the above two PDCCHs, the terminal device can obtain the first TCI corresponding to the first control information resource and the corresponding to the second control information resource in addition to the first DCI carried in the two PDCCHs
  • the second TCI Since the first DCI does not carry an indication field for indicating the TCI of the first downlink channel, in this case, the terminal device may use one of the above two TCIs for the first downlink channel. transmission.
  • the first downlink channel may be a PDSCH, a PDCCH, or any other downlink channel.
  • the above control information resources are used to represent time-frequency domain resources used for transmission of the PDCCH, for example, a control resource set (control-resource set, CORESET), or other time-frequency domain resources used to carry the PDCCH.
  • the above control information resource may overlap with the time domain resource and/or frequency domain resource where the first downlink channel is located, or may not overlap.
  • the control information resource may also overlap with the time-frequency resource and/or frequency-domain resource where the uplink channel is located.
  • the present application does not limit the time-frequency resource and the frequency-domain resource of the control information resource. For ease of understanding, this application uses control information resources as an example to describe in detail, but this is just a term for the time-frequency resources used to transmit the PDCCH, and the name is not limited in the embodiments of this application.
  • the DCI does not carry indication information indicating the TCI corresponding to the first downlink channel.
  • the first control information resource among the at least two control information resources is not configured to indicate the TCI corresponding to the first downlink channel; or, the format of the first DCI is the first format
  • the first format is DCI format 1_0; or, any one of the at least two control information resources is not configured to indicate the TCI corresponding to the first downlink channel; or, the at least two
  • the last control information resource among the control information resources is not configured to indicate the TCI corresponding to the first downlink channel; or, multiple control information resources among the at least two control information resources are not configured to Indication information indicating the TCI corresponding to the first downlink channel.
  • the above-mentioned first control information resource may be understood as the control information resource with the earliest start symbol, and/or the end symbol in the time domain, and/or slot index. If the start symbol and/or end symbol and/or time slot index of at least two control information resources are the same, then the first control information resource can be understood as the control information with the smallest frequency domain resource (such as REG or CCE index) Resources.
  • the embodiments of the present application may use multiple methods, for example, implicit mode or explicit mode, to ensure that the target TCI determined by the terminal device is determined by the first network device.
  • the target TCI is the same.
  • the first network device determines the first information corresponding to the first PDCCH according to the correspondence between the target TCI and the first information; the first network device according to the first Information and the target TCI, the first PDCCH is sent on the first control information resource.
  • the terminal device determining the target TCI from the at least two TCIs includes the terminal device determining the target TCI from the at least two TCIs according to the first information.
  • the first information is at least one of the following information:
  • a detection period corresponding to the at least two PDCCHs or,
  • the number of control information resources corresponding to the at least two PDCCHs or,
  • the time domain position of the control information resource corresponding to the at least two PDCCHs or,
  • the wireless network temporary identifier RNTI corresponding to the at least two PDCCHs; or,
  • a time difference between the transmission time of the at least two PDCCHs and the transmission time of the first downlink channel is a time difference between the transmission time of the at least two PDCCHs and the transmission time of the first downlink channel
  • An index of the control information resources of the at least two PDCCHs is an index of the control information resources of the at least two PDCCHs.
  • the index of the at least two TCIs is the index of the at least two TCIs.
  • the first network device and the terminal device may determine the target TCI in an implicit manner according to certain rules. In this way, the first network device and the terminal device can accurately determine the target TCI, improve the reliability of the first downlink channel transmission, and can also increase the DCI demodulation performance without increasing the number of DCI bits sent by the network device to the terminal device.
  • the first information includes identifiers of search spaces where at least two PDCCHs are located.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the identifiers of at least two search spaces on the at least two control information resources where the PDCCH is located.
  • the identification of the at least two search spaces includes the identification of the first search space and the identification of the second search space.
  • the identifier of the search space may be an index of the search space.
  • the terminal device determines the target TCI according to the maximum index of the search space.
  • the first network device determines the index of the search space according to the target TCI, that is, when the first network device sends the first PDCCH, it is placed on the search space with the largest index as much as possible, that is, the first search space The index is the largest of the at least two search spaces.
  • the terminal device determines that in at least two search spaces corresponding to at least two PDCCHs, the index of the first search space is the largest, that is, the index of the first search space is greater than the index of the second search space.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the control information resource where the first search space is located.
  • the TCI corresponding to the first downlink channel is the TCI corresponding to the control information resource where the first search space is located. It should be understood that the corresponding relationship between the control information resource and the TCI may be pre-defined, or may be configured by the network device to the terminal device through high-level signaling, which is not limited in this embodiment.
  • the terminal device determines the target TCI according to the minimum index of the search space.
  • the first network device determines the index of the search space according to the target TCI, that is, when the first network device sends the first PDCCH, it is placed on the search space with the smallest index as much as possible, that is, the first search space
  • the index is the smallest of the indexes of the at least two search spaces.
  • the terminal device determines that in at least two search spaces corresponding to at least two PDCCHs, the index of the first search space is the smallest, that is, the index of the first search space is smaller than the index of the second search space.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the control information resource where the first search space is located. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the control information resource where the first search space is located.
  • the terminal device determines the target TCI according to a pre-defined or high-level signaling configuration index of the search space.
  • the first network device determines a pre-defined or high-level signaling configuration search space index according to the target TCI, that is, the pre-defined or configured index number of the first search space where the control information resource corresponding to the target TCI is located, for example, the The index of a search space is 5, then, when the first network device sends the first PDCCH, it will be placed in the search space of index 5 and sent.
  • the terminal device determines a first search space with an index of 5 from at least two search spaces corresponding to at least two PDCCHs, and then determines the TCI corresponding to the first downlink channel according to the control information resource where the first search space is located . Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the control information resource where the first search space is located. It should be understood that the above method for determining the target TCI through the maximum index or the minimum index may also be configured through pre-defined or higher layer signaling.
  • the first information includes the type of search space where at least two PDCCHs are located.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the types of at least two search spaces on the at least two control information resources where the PDCCH is located.
  • the types of the at least two search spaces include the types of the first search space and the types of the second search space.
  • the types of search spaces include user-specific search spaces and public search spaces.
  • the terminal device determines the target TCI according to the user-specific search space.
  • the first network device determines the type of search space according to the target TCI, that is, when the first network device sends the first PDCCH, it is placed on the user-specific search space and sent. In this way, the terminal device determines the TCI corresponding to the first downlink channel according to the control information resource corresponding to the first search space where the PDCCH is located, and the first search space is a user-specific search space.
  • the terminal device determines the target TCI according to the common search space.
  • the first network device determines the type of search space according to the target TCI, that is, when the first network device sends the first PDCCH, it is placed on the common search space and sent. In this way, the terminal device determines the TCI corresponding to the first downlink channel according to the control information resource corresponding to the first search space where the PDCCH is located, and the first search space is a common search space.
  • the above-mentioned manner of determining the target TCI through the user-specific search space or the public search space may be configured through pre-defined or high-level signaling.
  • the first information includes a detection period corresponding to at least two PDCCHs.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the detection period corresponding to at least two PDCCHs.
  • the detection period corresponding to the at least two PDCCHs includes a first PDCCH detection period and a second PDCCH detection period.
  • the terminal device determines the target TCI according to the largest detection period in the PDCCH detection period.
  • the first network device determines the PDCCH detection period according to the target TCI, that is, when the first network device sends the first PDCCH, the first network device sends the first PDCCH on the PDCCH detection opportunity configured with the largest PDCCH detection period.
  • the terminal device determines the first PDCCH with the largest detection period among at least two PDCCHs, that is, the first PDCCH detection period is greater than the second PDCCH detection period.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the control information resource corresponding to the first PDCCH detection period. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the control information resource corresponding to the first PDCCH detection period.
  • the terminal device determines the target TCI according to the minimum periodic detection period in the PDCCH detection period.
  • the first network device determines the PDCCH detection period according to the target TCI, that is, when the first network device sends the first PDCCH, the first network device sends the first PDCCH on the PDCCH detection opportunity with the smallest PDCCH detection period.
  • the terminal device determines the first PDCCH with the smallest detection period among the at least two PDCCHs, that is, the first PDCCH detection period is less than the second PDCCH detection period.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the control information resource corresponding to the first PDCCH detection period. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the control information resource corresponding to the first PDCCH detection period.
  • the terminal device configures the PDCCH detection period according to a predefined or high-layer signaling to determine the target TCI.
  • the first network device determines a pre-defined or high-level signaling configuration PDCCH detection period according to the target TCI, that is, the PDCCH detection period corresponding to the control information resource corresponding to the target TCI is predefined or configured, for example, the The PDCCH detection period is that the PDCCH detection timing occurs once every 10 symbols. Then, when the first network device sends the first PDCCH on the PDCCH detection timing that configures the PDCCH detection period to occur once every 10 symbols.
  • the terminal device may determine the detection period from the detection period corresponding to at least two PDCCHs as the first PDCCH on the PDCCH detection timing every 10 symbols, and then determine the first according to the control information resource corresponding to the first PDCCH detection period TCI corresponding to the downlink channel. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the control information resource corresponding to the first PDCCH detection period. It should be understood that the above-mentioned manner of determining the target TCI through the maximum PDCCH detection period or the minimum PDCCH detection period may also be configured through pre-defined or higher layer signaling.
  • the first information includes the number of control information resources corresponding to at least two PDCCHs.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the number of at least two control information resources corresponding to the PDCCH.
  • the at least two control information resources include a first control information resource and a second control information resource.
  • the terminal device determines the target TCI according to the number of control information resources corresponding to the detected PDCCH.
  • the first network device determines the number of control information resources corresponding to the PDCCH according to the target TCI, that is, the first network device can send multiple first PDCCHs on N1 first control information resources corresponding to the first TCI.
  • the second network device may send one or more second PDCCHs on N2 second control information resources corresponding to the second TCI.
  • N1 is greater than N2, and both N1 and N2 are integers greater than or equal to 1.
  • the terminal device can determine the first TCI corresponding to the larger first control information resource as the target TCI according to the number of control information resources corresponding to at least two PDCCHs, and then determine the TCI corresponding to the first downlink channel.
  • N1 is less than N2, and both N1 and N2 are integers greater than or equal to 1.
  • the terminal device can determine the first TCI corresponding to the smaller first control information resource as the target TCI according to the number of control information resources corresponding to at least two PDCCHs, and then determine the TCI corresponding to the first downlink channel.
  • the TCI corresponding to the first downlink channel is the first TCI.
  • the first information includes time domain positions of control information resources corresponding to at least two PDCCHs.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the time domain position of the at least two control information resources where the PDCCH is located (that is, the position of the time domain resource where the control information resources are located).
  • the at least two time domain resource locations include the first time domain resource location and the second time domain resource location.
  • the terminal device determines the target TCI according to the relative position relationship of the time-domain resources among the at least two control information resources.
  • the first network device determines the time domain resource among the at least two control information resources according to the target TCI.
  • the first network device and the second network device use the relative time domain resources among the at least two control information resources.
  • the PDCCH is sent based on the positional relationship.
  • the terminal device determines the target TCI according to the relative positional relationship of the time domain resources in the at least two control information resources. That is, the first network device uses the control information resource corresponding to the time domain resource satisfying the preset relative position relationship as the first control information resource, and sends the first PDCCH on the first control information resource.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the control information resource corresponding to the first time domain resource.
  • the preset relative position relationship includes at least one of the following relationships:
  • the start symbol of the first time domain resource precedes the start symbol of the second time domain resource; or,
  • the start symbol of the first time domain resource follows the start symbol of the second time domain resource; or,
  • the end symbol of the first time domain resource precedes the end symbol of the second time domain resource; or,
  • the termination symbol of the first time domain resource follows the termination symbol of the second time domain resource; or,
  • the number of occupied symbols of the first time domain resource is greater than that of the second time domain resource; or,
  • the number of occupied symbols of the first time domain resource is smaller than the number of occupied symbols of the second time domain resource.
  • the terminal device determines the target TCI in a manner of pre-defined or high-level signaling configuration of the time domain resource location.
  • the first network device determines a pre-defined or high-level signaling configuration time domain resource according to the target TCI. That is, the position of the first time domain resource can be pre-defined or configured, for example, the symbol index is 4-7, then, when the first network device sends the first PDCCH, the position of the first time domain resource that is pre-defined or configured
  • the corresponding control information resource is determined to be the first control information resource, and the first PDCCH is sent on the first control information resource.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the first control information resource corresponding to the first time domain resource. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the first control information resource corresponding to the first time domain resource. It should be understood that the above-mentioned pre-defined or high-level signaling configured first time domain resource includes one or more of the start symbol, the end symbol, or the duration of the first time domain resource, which is not limited in the embodiments of the present application .
  • the first information includes at least one of candidate PDCCH indexes, CCE indexes, or REG indexes corresponding to at least two PDCCHs.
  • the terminal device determines the TCI corresponding to the first downlink channel according to at least two first information corresponding to at least two control information resources where the at least two PDCCHs are located.
  • the at least two first information includes first information #A (corresponding to the first control information resource) and first information #B (corresponding to the second control information resource).
  • the first information here may include: the candidate PDCCH index corresponding to the PDCCH, the starting CCE index where the PDCCH is located, the ending CCE index where the PDCCH is located, the starting REG index where the PDCCH is located, the ending REG index where the PDCCH is located, or CCE to REG At least one mapping method.
  • the mapping mode of CCE to REG includes: interleaved, non-interleaved mapping or REG binding size.
  • the terminal device determines the target TCI according to the relationship between at least two indexes of the first information.
  • the first network device determines the index of one of the at least two indexes of the first information according to the target TCI.
  • the relationship between the first information #A and the first information #B is: the index of the first information #A is larger than the index of the first information #B; or, the index of the first information #A is smaller than the index of the first information #B .
  • the first network device determines the control information resource corresponding to the index of the first information #A as the first control information resource, and sends the PDCCH on the first control information resource.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the first control information resource corresponding to the first information #A. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the first control information resource corresponding to the first information #A.
  • the terminal device determines the target TCI according to an index of pre-defined or high-level signaling configuration first information.
  • the first network device determines a pre-defined or high-level signaling configuration index of the first information according to the target TCI. That is, the index of the first information #A is defined or configured in advance, then when the first network device transmits the first PDCCH, the control information resource corresponding to the index of the first information #A defined or configured in advance is determined as the first control Information resources, and send the first PDCCH on the first control information resources.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the first control information resource corresponding to the first information #A.
  • the TCI corresponding to the first downlink channel is the TCI corresponding to the first control information resource corresponding to the first information #A. It should be understood that the foregoing manner of determining the target TCI through the relationship between at least two indexes of the first information may also be configured through pre-defined or high-level signaling.
  • the first information includes at least one of RNTI or DCI formats corresponding to at least two PDCCHs.
  • the terminal device determines the TCI corresponding to the first downlink channel according to at least two RNTIs corresponding to at least two PDCCHs.
  • the first network device determines the RNTI corresponding to the PDCCH according to the target TCI.
  • the at least two RNTIs include a first RNTI and a second RNTI.
  • the target TCI may be determined in a manner of predefining or configuring the first RNTI by higher layer signaling. That is, the first RNTI may be pre-defined or configured. Then, when sending the first PDCCH, the first network device will use the pre-defined or configured first RNTI to scramble the first DCI carried on the first PDCCH, and then send the first A PDCCH.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the first PDCCH corresponding to the first RNTI. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the first PDCCH corresponding to the first RNTI.
  • the first RNTI may be MCS-C-RNTI or TRP-RNTI, or may be other RNTIs, which is not limited in the embodiment of the present application.
  • the terminal device determines the TCI corresponding to the first downlink channel according to at least two DCI formats corresponding to at least two PDCCHs.
  • the first network device determines the DCI format corresponding to the PDCCH according to the target TCI.
  • the DCI format corresponding to the PDCCH can be understood as the DCI format corresponding to the DCI carried by the PDCCH.
  • the at least two DCI formats include a first DCI format and a second DCI format.
  • the target TCI may be determined in a manner of predefining or configuring the first DCI format by higher layer signaling. That is, the first DCI format may be pre-defined or configured.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the first PDCCH corresponding to the first DCI format. Further, the TCI corresponding to the first downlink channel is the TCI corresponding to the first PDCCH corresponding to the first DCI format.
  • the above first format may be a DCI format defined in advance or configured by higher layer signaling.
  • the first information includes the time difference between the transmission time of at least two PDCCHs and the transmission time of the first downlink channel.
  • the terminal device determines the TCI corresponding to the first downlink channel according to at least two time differences between the transmission time of at least two PDCCHs and the transmission time of the first downlink channel.
  • the first network device determines the time difference between the transmission time of at least one PDCCH and the transmission time of the first downlink channel according to the target TCI.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel needs to be greater than or equal to a scheduling threshold, which is referred to as the first threshold in this application . Therefore, the terminal device may determine the TCI adopted by the PDCCH corresponding to the time difference greater than or equal to the first threshold among the at least two time differences as the target TCI.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel may be one of the following:
  • the first information includes the number of PDCCHs corresponding to at least two PDCCHs.
  • the terminal device determines the TCI corresponding to the first downlink channel according to the number of PDCCHs corresponding to at least two PDCCHs.
  • the first network device determines the number of PDCCHs corresponding to at least one PDCCH according to the target TCI.
  • the terminal device determines the target TCI according to the number of detected PDCCHs. That is, the first network device sends the first PDCCH on the control information resource with the largest or smallest number of detected PDCCHs. In this way, the terminal device can first determine the largest or smallest number of control information resources corresponding to at least two PDCCHs. A control information resource, and then determine the TCI corresponding to the first downlink channel according to the first control information resource. Further, the TCI corresponding to the first downlink channel is the first corresponding TCI. It should be understood that the above method for determining the target TCI by detecting the maximum or minimum number of PDCCHs may also be configured through pre-defined or high-level signaling. The terminal device may also determine the target TCI according to a pre-defined or high-level signaling configuration of other numbers (or ranges of numbers) of control information resources, which is not limited in the embodiments of the present application.
  • the above-mentioned first information may include: indexes of control information resources of the at least two PDCCHs.
  • the TCI corresponding to the control information resource with a small index may be previously defined as the target TCI, or the TCI corresponding to the control information resource with a large index may be previously defined as the target TCI.
  • the above-mentioned first information may include: indexes of the at least two TCIs.
  • a TCI with a small index may be defined as a target TCI in advance, or a TCI with a large index may be defined as a target TCI in advance.
  • the terminal device may also make a comprehensive judgment in combination with the above-mentioned various situations to ensure that a TCI is finally selected as the target TCI.
  • the method for combining multiple situations is described in detail below. The method may include the following steps:
  • Step 1 The terminal device determines candidate TCI according to situation A;
  • Step 2 If the candidate TCI includes a TCI, the terminal device determines the candidate TCI as the target TCI. If the candidate TCI includes multiple TCIs, the terminal device no longer considers the situation corresponding to step one, and can determine a new candidate TCI from the candidate TCI according to another situation B other than the situation corresponding to step one. The candidate TCI includes multiple TCIs, then step 1 is re-executed until a unique target TCI is determined. It can be understood that each case is used only once to screen candidate TCIs, and after one use, one or more of other cases where no judgment is made are used to determine candidate TCIs.
  • case A is different from case B, and both case A and case B can belong to the above 9 cases, but the embodiment of the present application does not limit this.
  • the terminal device may first determine the target TCI according to case 8 (that is, the time difference between the transmission time of at least two PDCCHs and the transmission time of the first downlink channel). If a unique target TCI cannot be determined, the terminal device may then determine the target TCI from the remaining TCIs according to case 5 (that is, the time domain position of the control information resources corresponding to at least two PDCCHs).
  • the terminal device may then according to case 6 (that is, at least one of candidate PDCCH indexes, CCE indexes, or REG indexes corresponding to at least two PDCCHs), or case 3 (at least two PDCCHs) The corresponding detection period), or case 1 (that is, the identification of the search space where at least two PDCCHs are located), determine the target TCI from the remaining TCIs.
  • case 6 that is, at least one of candidate PDCCH indexes, CCE indexes, or REG indexes corresponding to at least two PDCCHs
  • case 3 at least two PDCCHs
  • case 1 that is, the identification of the search space where at least two PDCCHs are located
  • the terminal device may also first determine the target TCI according to the detection period corresponding to the PDCCH. If a unique TCI cannot be determined, then according to the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel, from Among the remaining TCI, the target TCI is determined. That is, in the case where the first information includes at least two pieces of information, the present application does not limit the judgment order of the first information.
  • the above information for determining the target TCI may have priority, that is, the terminal device may first adopt the above first The information with higher priority in the information is used for judgment. If the information with higher priority cannot determine the only target TCI, the terminal device uses the information with lower priority for judgment. It should be understood that the priority may be configured to the terminal device in a manner defined in advance or configured by the network device through high-level signaling.
  • the method further includes: the first network device sends high-level signaling, the high-level signaling is used to indicate the target TCI; and the terminal device receives the high-level signaling.
  • the target TCI corresponding to the first downlink channel is indicated to the terminal device in a display manner.
  • the first network device sends high-layer signaling to the terminal device to indicate the target TCI, but it should be understood that the target TCI is still one of the at least two TCIs. Since the target TCI (ie, the first TCI) corresponds to the first control information resource, this is equivalent to semi-statically configuring the first control information resource corresponding to the first downlink channel for the terminal device, that is, semi-statically configuring the first network device to the terminal
  • the device sends the first downlink channel.
  • the high-level signaling is sent by the first network device to the terminal device, but it should be understood that in a specific implementation, the high-level signaling may also be sent to the terminal device by other network devices or nodes. This application The embodiment does not limit this.
  • high-level signaling may refer to signaling sent by a high-level protocol layer, and the high-level protocol layer is at least one protocol layer in each protocol layer above the physical layer.
  • the high-level protocol layer may specifically be at least one of the following protocol layers: medium access control (medium access control (MAC) layer, radio link control (radio link control, RLC) layer, packet data convergence protocol (packet data convergence) protocol (PDCP) layer, radio resource control (radio resource control, RRC) layer, non-access layer (non access stratum, NAS), etc.
  • the physical layer signaling or dynamic signaling is generally control information carried in DCI.
  • the above high-level signaling may be configured for the serving cell, may be configured for the HARQ process number, may be configured for the codeword, or may be configured for the DCI, which is not limited in the embodiment of the present application.
  • the high-layer signaling may be configured for the serving cell, that is, different serving cells may adopt different high-layer signaling for determining the target TCI. It is understandable that the first serving cell may use the higher layer signaling configuration to determine the target TCI, the second serving cell may not use the higher layer signaling configuration to determine the target TCI, or the second serving cell is not configured for The high-level signaling for determining the TCI, or the second serving cell may determine the target TCI in a predefined manner.
  • the advantage of this implementation is that the network device can also flexibly decide on which serving cell to perform repeated multi-TRP PDCCH transmission, and on which serving cell to not perform repeated multi-TRP PDCCH repeated transmission.
  • the network device may configure the target TCI through high-layer signaling in the serving cell that performs multi-TRP PDCCH repeated transmission.
  • the high-level signaling here can also be directed to part of the bandwidth, and the implementation method is similar to that of the serving cell, which is not repeated here.
  • the high-layer signaling may be configured for the HARQ process number, that is, different HARQ process numbers may adopt different high-layer signaling for determining the target TCI.
  • the HARQ process number is generally notified in DCI or determined according to predefined rules.
  • the transmission block on the first HARQ process number may use the high-level signaling configuration to determine the target TCI
  • the transmission block on the second HARQ process number may not use the high-level signaling configuration to determine the target TCI, or the second HARQ process
  • the transport block on the number is not configured with high-level signaling for determining the target TCI, or the transport block on the second HARQ process number may determine the target TCI in a pre-defined manner.
  • the advantage of this implementation is that the network device can flexibly decide on which HARQ process number to perform multi-TRP PDCCH repeated transmission, and on which HARQ process number does not perform multi-TRP PDCCH repeated transmission. In this way, terminal devices in the same serving cell or part of the bandwidth can dynamically switch between different transmission modes.
  • the high-level signaling may be configured for codewords, that is, different codewords may adopt different high-level signaling for determining the target TCI, or different numbers of codewords may use different high-level signaling for determining the target TCI .
  • the codeword is generally 0 or 1
  • the number of codewords is generally 1 or 2.
  • the first codeword may use the higher layer signaling configuration to determine the target TCI
  • the second codeword may not use the higher layer signaling configuration to determine the target TCI
  • the second codeword is not configured to determine the target TCI.
  • the second codeword can determine the target TCI in a predefined manner.
  • the advantage of this implementation is that the network device can flexibly decide on which codeword or number of codewords to perform repeated PDCCH transmission between multiple TRPs, and on which codeword or which number of codewords does not perform PDCCH repetition between multiple TRPs. transmission. In this way, terminal devices in the same serving cell or part of the bandwidth can dynamically switch between different transmission modes. It should be understood that the above codeword or the number of codewords may be configured by high-level signaling or may be dynamically notified in DCI.
  • the higher layer signaling may also be configured for DCI, that is, different DCIs may use different higher layer signaling for determining the target TCI.
  • the different DCIs here may be different DCI formats, for example, DCI format 1_0, or DCI format 1_1, or DCI scrambled by different RNTIs, or DCI of different search spaces, which is not limited here.
  • the first downlink channel scheduled by the first DCI may use a high-layer signaling configuration to determine the target TCI
  • the second downlink channel scheduled by the second DCI may not use a high-layer signaling configuration to determine the target TCI, or the second DCI
  • the scheduled second downlink channel is not configured with high-level signaling for determining the target TCI, or the second downlink channel scheduled by the second DCI may determine the target TCI in a predefined manner.
  • the DCI includes first indication information, and the first indication information is used to indicate one of the at least two TCIs; the terminal device determines a target from the at least two TCIs TCI includes: the terminal device determining the target TCI according to the first indication information.
  • the first indication information may be the first bit field in DCI.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the bit state of the first bit field in DCI.
  • the bit state of the first bit field may include a first bit state and a second bit state.
  • the first bit state is used to indicate the first TCI corresponding to the first control information resource among the at least two control information resources.
  • the second bit state is used to indicate the second TCI corresponding to the second control information resource among the at least two control information resources.
  • the first indication information may directly indicate one of the at least two TCIs, or may indicate one of the at least two control information resources, and then the terminal device determines the control information resource according to the indicated control information resource.
  • the TCI corresponding to the control information resource is not limited in this embodiment of the present application.
  • the network device may introduce a 1-bit indication field in the DCI, or the indication field is 1 bit to indicate the target TCI.
  • the indication field is 1 bit to indicate the target TCI.
  • 0 is used to indicate that the target TCI is the first TCI corresponding to the first control information resource
  • 1 is used to indicate that the target TCI is the second TCI corresponding to the second control information resource
  • 1 is used to indicate that the target TCI is the first control
  • the first TCI corresponding to the information resource 0 is used to indicate that the target TCI is the second TCI corresponding to the second control information resource.
  • the terminal device After receiving the DCI, the terminal device directly determines the target TCI corresponding to the first downlink channel according to the 1-bit indication field in the DCI.
  • the time difference between the transmission time of the PDCCH corresponding to the target TCI and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel needs to be greater than or equal to a scheduling threshold, which is referred to as the first threshold in this application . Therefore, the time difference between the transmission time of the PDCCH corresponding to the target TCI selected by the terminal device and the transmission time of the first downlink channel needs to be greater than or equal to the first threshold.
  • the first threshold may be defined in advance, or may be configured by the network device for the terminal device through signaling, or may be reported by the terminal device, which is not limited in this embodiment of the present application.
  • the terminal device first determines the target TCI, and then determines whether the time difference between the transmission time of the PDCCH corresponding to the target TCI and the transmission time of the first downlink channel is greater than or equal to the first threshold. If the time difference is greater than or equal to the first threshold, the terminal device may directly use the target TCI as the TCI corresponding to the first downlink channel. If the time difference is less than the first threshold, the terminal device may re-determine the target TCI whose time difference meets the condition.
  • the terminal device may assign the TCI corresponding to the last PDCCH transmitted in at least two PDCCHs, or the PDCCH corresponding to the first PDCCH transmitted in at least two PDCCHs.
  • the TCI is determined as the TCI corresponding to the first downlink channel.
  • the terminal device determines the target TCI from the TCIs corresponding to the multiple PDCCHs whose time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel is greater than or equal to the second threshold.
  • the time difference between the transmission time of the last transmitted PDCCH and the transmission time of the first downlink channel in the at least two PDCCHs is greater than or equal to the second threshold; or,
  • the time difference between the transmission time of the PDCCH transmitted for the first time in the at least two PDCCHs and the transmission time of the first downlink channel is greater than or equal to the second threshold.
  • the time difference between the transmission time of the last transmitted PDCCH and the transmission time of the first downlink channel in at least two PDCCHs is greater than or equal to the second threshold. It should be understood that, if the time difference corresponding to the last transmitted PDCCH does not satisfy the above condition (that is, the time difference is less than the second threshold), the terminal device may select the TCI corresponding to the PDCCH that last satisfies the condition as the target TCI.
  • the time difference between the transmission time of the first transmitted PDCCH and the transmission time of the first downlink channel in at least two PDCCHs is greater than or equal to the second threshold. It should be understood that if the time difference corresponding to the PDCCH transmitted for the first time satisfies the above condition (that is, the time difference is greater than or equal to the second threshold), the terminal device may select at least one of the PDCCH corresponding to the condition according to Case 1 to Case 9 As the target TCI.
  • the terminal device may determine the target TCI without using the method of this embodiment, that is, without using the method of this embodiment.
  • the method determines the TCI corresponding to the first downlink channel.
  • the terminal device may now assume a predefined TCI or assume no TCI indication.
  • the second threshold may be equal to the first threshold.
  • the second threshold may be pre-defined, or may be configured by the network device for the terminal device through signaling, or may be reported by the terminal device, which is not limited in this embodiment of the present application. .
  • the above-mentioned first transmission may be understood as the earliest transmission in the time domain, for example, the transmission with the earliest start symbol, and/or the end symbol, and/or the smallest slot index.
  • the control information resource transmission PDCCH corresponding to this earliest transmission is the PDCCH transmitted for the first time. If the start symbol, and/or end symbol, and/or time slot index of at least two control information resources are the same, the first transmission can be understood as a transmission with the smallest frequency domain resource, for example, REG or CCE index .
  • the control information resource transmission PDCCH corresponding to this smallest one-time transmission is the PDCCH transmitted for the first time.
  • the above-mentioned last transmission can be understood as the latest transmission in the time domain, for example, the transmission with the latest start symbol, and/or the latest termination symbol, and/or the largest slot index.
  • the control information resource transmission PDCCH corresponding to this latest transmission is the last transmission PDCCH. If the start symbol, the end symbol, and/or the index of at least two control information resources are the same, the last transmission may be understood as the one transmission with the largest frequency domain resource, such as the REG or CCE index.
  • the control information resource transmission PDCCH corresponding to this largest one-time transmission is the PDCCH last transmitted.
  • the terminal device determines time domain resources of at least two control information resources corresponding to at least two PDCCHs. The terminal device determines whether the time difference between the transmission time of at least two PDCCHs and the transmission time of the first downlink channel is greater than or equal to the first threshold according to the at least two time domain resources. Further, if the first time domain resource is one of the at least two time domain resources, and the time difference between the first time domain resource and the first downlink channel is greater than or equal to the first threshold, the terminal device It is determined that the time difference between the transmission time of at least two PDCCHs and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the terminal device determines that the time difference between the transmission time of at least two PDCCHs and the transmission time of the first downlink channel is less than the first A threshold.
  • the first time domain resource is the last time domain resource in at least two time domain resources, or the first time domain resource is the first time domain resource in at least two time domain resources, or, the first time The domain resource is a time domain resource corresponding to the control information resource corresponding to the target TCI, or the first time domain resource is a pre-defined or high-level signaling configuration time domain resource.
  • the time difference between the first time domain resource and the first downlink channel can be understood as:
  • the time difference between the end symbol of the first time domain resource and the start symbol of the first downlink channel is the time difference between the end symbol of the first time domain resource and the start symbol of the first downlink channel.
  • the method further includes: the terminal device sends capability information, where the capability information is used to indicate that the terminal device can receive at least two PDCCHs; and/or,
  • the terminal device receives first configuration information, and the first configuration information is used to configure the terminal device to receive at least two PDCCHs.
  • the terminal device may report its own capability information to the network device (eg, the first network device and/or the second network device), indicating that the terminal device supports the ability to receive at least two PDCCHs.
  • the network device may send the first configuration information to the terminal device to configure the terminal device to receive at least two PDCCHs. It should be understood that the network device may send the first configuration information to the terminal device based on the capability information reported by the terminal device, or may not send the first configuration information to the terminal device based on the capability information reported by the terminal device (or when the terminal device does not report capability information).
  • Configuration information It should be understood that the repetition times of the at least two PDCCHs may be configured by high-layer signaling or may be pre-defined.
  • the terminal device reports capability information to the network device, which can enable the network device to flexibly configure whether to perform PDCCH repeated transmission according to requirements, thereby flexibly adapting to multiple different scenarios.
  • the terminal device cannot determine the TCI corresponding to the first downlink channel using the method of the embodiment of the present application. If the capability information reported by the terminal device indicates that the terminal device supports the ability to receive at least two PDCCHs, but the network device may send third configuration information to the terminal device, and the third configuration information is used to configure the terminal device to not receive at least Two PDCCHs. At this time, it can be understood that the terminal device cannot determine the TCI corresponding to the first downlink channel by using the method of the embodiment of the present application.
  • the at least two PDCCHs may correspond to the same DCI format, and/or there is a correspondence between the second information corresponding to the at least two PDCCHs, and the correspondence The relationship can be pre-defined or configured by high-level signaling.
  • the second information includes at least one of the following: the candidate PDCCH index, or the index of the starting CCE, or the index of the starting REG. It can be understood that, the second information corresponding to the at least two PDCCHs has a pre-defined or high-level signaling configuration association relationship. In this way, the terminal device can perform joint detection of the PDCCH, reducing the number of blind detections of the terminal device.
  • the terminal device determining the target TCI from the at least two TCIs includes: if at least one of the following conditions is met, the terminal device from the at least two TCIs Determine the target TCI:
  • the RNTI scrambling the at least two PDCCHs is the first RNTI; or,
  • the search space corresponding to the at least two PDCCHs is the first search space; or,
  • the format of the DCI is the first format; or,
  • the at least two control information resources belong to the first control information resource group; or,
  • the bit state of the priority bit field of the DCI is the first bit state.
  • the terminal device may determine the TCI corresponding to the first downlink channel by using the method of the embodiment of the present application only when at least one of the above conditions is satisfied.
  • the above-mentioned first RNTI, first search space, first format, or first control information resource group, or first bit state may be pre-defined, or may be configured by the network device to the terminal device through higher layer signaling.
  • the above-mentioned first bit state is used to indicate an integer value greater than 0, such as 1, 2, 3, 4, 5, 6, 7, and 8. It can be understood that, when the integer value of the bit state of the DCI priority bit field indicates a value greater than 0 (that is, when the bit state of the DCI priority bit field is the first bit state), the DCI indicates the transmitted The information is high-priority important data information. At this time, the terminal device needs to determine the target TCI from at least two TCIs.
  • the method further includes: the terminal device receives second configuration information, and the second configuration information is used to configure the first RNTI, the first search space, and the first At least one of the format, or the first control information resource group, or the first bit state.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the first RNTI is MCS-C-RNTI.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the first search space is a public search space or a user-specific search space.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the first DCI format is DCI format 1_0, or DCI format 1_1, or DCI format 1_2.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the terminal device may determine the first according to the embodiment of the present application TCI corresponding to the downlink channel.
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the terminal device may The manner of the embodiment of the present application determines the TCI corresponding to the first downlink channel. It should be understood that the terminal device determines according to which of the above situations may be pre-defined, or the network device may configure the terminal device through high-level signaling.
  • the terminal device may also determine whether to use the method of the embodiment of the present application to determine the TCI corresponding to the first downlink channel according to the time-frequency resource of the first downlink channel indicated by DCI.
  • the method of the embodiment of the present application may be used to determine the target TCI from at least two TCIs:
  • the resource index of the first downlink channel belongs to the first index set; or,
  • the time domain resource length of the first downlink channel belongs to the first time domain length; or,
  • the transmission time offset of the transmission time of the first downlink channel belongs to the first offset set.
  • the first index set is ⁇ 0,1,2...15 ⁇
  • the terminal device may use the method of the embodiment of the present application Determine the TCI corresponding to the first downlink channel.
  • different resource sets can be flexibly configured for different service types, so that the terminal device can use the method of the embodiment of the present application only under a specific service type.
  • the first time domain length includes one or more of ⁇ 2,4,7 ⁇ , when the time domain resource length of the first downlink channel belongs to one or more of ⁇ 2,4,7 ⁇
  • the terminal device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the first offset set is ⁇ 0,1,2,3,4 ⁇ , when the transmission time offset of the first downlink channel belongs to ⁇ 0,1,2,3,4 ⁇ , the terminal The device may determine the TCI corresponding to the first downlink channel according to the embodiment of the present application.
  • the terminal device may determine the TCI corresponding to the first downlink channel using the method of the embodiment of the present application only when the following conditions are met: the terminal device determines the TCI corresponding to at least two control information resources Different, or at least two control information resources have different index numbers, or at least two control information resources have different time domain resources; or, the PDCCH is configured or instructed to repeat transmission.
  • the network device may also send fourth configuration information to the terminal device, where the fourth configuration information is used to configure the number of repeated transmissions of the PDCCH, specifically, the number of transmissions of the PDCCH is greater than or equal to 2.
  • the PDCCH repeated transmission may be at least one of repeated transmission in the time domain, repeated transmission in the frequency domain, or repeated transmission in the code domain.
  • the network device may also send fifth configuration information to the terminal device, where the fifth configuration information is used to configure that the repeated transmission of the PDCCH is repeated transmission between different TRPs.
  • each network element such as a terminal device and a network device, includes a hardware structure and/or a software module corresponding to performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driven hardware depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide the function modules of the terminal device and the network device according to the above method examples.
  • each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of the modules in the embodiments of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.
  • FIG. 3 shows an apparatus 300 for transmitting a downlink channel provided by an embodiment of the present application.
  • the device for transmitting a downlink channel is a terminal device or a device for transmitting a downlink channel that supports the terminal device to implement the method provided in the embodiment.
  • the device for transmitting a downlink channel may be a chip system.
  • the device 300 includes a receiving unit 310 and a processing unit 320.
  • the apparatus 300 is used to execute various processes and steps corresponding to the terminal device in the above method 200.
  • the receiving unit 310 is configured to receive at least two physical downlink control channels PDCCH on at least two control information resources, the downlink control information DCI carried by the at least two PDCCHs is the same, and the DCI is used to indicate the first downlink channel Corresponding time-frequency resources; the processing unit 320 is configured to: obtain at least two transmission configuration indication TCIs corresponding to the at least two control information resources, and determine a target TCI from the at least two TCIs, where the target TCI is The TCI corresponding to the first downlink channel; the receiving unit 310 is configured to: receive the first downlink channel according to the DCI and the target TCI determined by the processing unit 320.
  • the processing unit 320 is specifically configured to: determine the target TCI from the at least two TCIs according to at least one of the following information: the identification of the search space where the at least two PDCCHs are located; or, the at least The type of search space where the two PDCCHs are located; or, the detection period corresponding to the at least two PDCCHs; or, the number of control information resources corresponding to the at least two PDCCHs; or, the control corresponding to the at least two PDCCHs Time domain position of information resources; or, candidate PDCCH indexes corresponding to the at least two PDCCHs; or, control resource element CCE indexes corresponding to the at least two PDCCHs; or resource element groups corresponding to the at least two PDCCHs REG index; or, the wireless network temporary identification RNTI corresponding to the at least two PDCCHs; or, the time difference between the transmission time of the at least two PDCCHs and the transmission time of the first downlink channel; or, Indexes of control information resources
  • the receiving unit 310 is further configured to receive high-level signaling, and the high-level signaling is used to indicate the target TCI.
  • the DCI does not carry indication information indicating the TCI corresponding to the first downlink channel.
  • the time difference between the transmission time of the PDCCH corresponding to the target TCI and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the time difference between the transmission time of the last transmitted PDCCH and the transmission time of the first downlink channel in the at least two PDCCHs is greater than or equal to a second threshold; or, in the at least two PDCCHs
  • the time difference between the transmission time of the PDCCH transmitted for the first time and the transmission time of the first downlink channel is greater than or equal to the second threshold.
  • the device further includes: a sending unit for sending capability information, the capability information is used to indicate that the device can receive at least two PDCCHs; and/or, the receiving unit 310 is further used for: receiving Configuration information, the first configuration information is used to configure the device to receive at least two PDCCHs.
  • the processing unit 320 is specifically configured to: when at least one of the following conditions is met, determine the target TCI from the at least two TCIs: the RNTI scrambling the at least two PDCCHs is the first RNTI Or, the search space corresponding to the at least two PDCCHs is the first search space; or, the format of the DCI is the first DCI format; or, the at least two control information resources belong to the first control information resource group; Alternatively, the bit state of the priority bit field of the DCI is the first bit state.
  • the physical device corresponding to the receiving unit is a receiver
  • the physical device corresponding to the processing unit is a processor
  • the physical device corresponding to the sending unit is a transmitter.
  • the device 300 here is embodied in the form of a functional unit.
  • the term "unit” here may refer to an application-specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group) for executing one or more software or firmware programs Processor, etc.) and memory, merge logic, and/or other suitable components that support the described functions.
  • ASIC application specific integrated circuit
  • processor such as a shared processor, a proprietary processor or a group
  • memory merge logic, and/or other suitable components that support the described functions.
  • the apparatus 300 may specifically be the terminal device in the foregoing embodiment, and the apparatus 300 may be used to execute various processes and/or steps corresponding to the terminal device in the foregoing method embodiment, To avoid repetition, I will not repeat them here.
  • FIG. 4 shows a possible composition example of the apparatus for transmitting a downlink channel mentioned above and in the embodiment, and the apparatus for transmitting a downlink channel can perform each method of the present application Steps performed by the network device in any method embodiment of the embodiment, as shown in FIG. 4, the device for transmitting a downlink channel is a network device or a device for transmitting a downlink channel that supports the network device to implement the method provided in the embodiment,
  • the device for transmitting the downlink channel may be a chip system.
  • the device 400 includes a processing unit 410 and a sending unit 420.
  • the processing unit 410 is configured to: determine the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel, and according to the target TCI and the first information Correspondence relationship to determine the first information corresponding to the PDCCH; the sending unit 420 is used to send the PDCCH on the control information resource according to the first information and the target TCI determined by the processing unit 410, so The PDCCH carries downlink control information DCI, and the first downlink channel is sent according to the DCI and the target TCI.
  • the first information is at least one of the following information: the identifier of the search space where the PDCCH is located; or, the type of search space where the PDCCH is located; or, the detection period corresponding to the PDCCH; or, The number of control information resources corresponding to the PDCCH; or, the time domain position of the control information resources corresponding to the PDCCH; or, the candidate PDCCH index corresponding to the PDCCH; or, the control resource element CCE index corresponding to the PDCCH; or , The REG index of the resource element group corresponding to the PDCCH; or, the wireless network temporary identifier RNTI corresponding to the PDCCH; or, the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel; or , An index of the control information resources of the at least two PDCCHs; or, an index of the at least two TCIs.
  • the DCI does not carry indication information indicating the TCI corresponding to the first downlink channel.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the apparatus further includes: a receiving unit configured to receive capability information indicating that the terminal device can receive at least two PDCCHs; and/or, the sending unit 420 is further configured to transmit the first Configuration information, the first configuration information is used to configure the terminal device to receive at least two PDCCHs.
  • the processing unit 410 is specifically configured to: when at least one of the following conditions is met, determine the TCI corresponding to the PDCCH as the target TCI: the RNTI that scrambles the PDCCH is the first RNTI; Or, the search space corresponding to the PDCCH is the first search space; or, the format of the DCI is the first DCI format; or, the control information resource belongs to the first control information resource group; or, the priority of the DCI
  • the bit state of the level bit field is the first bit state.
  • the processing unit 410 is used to: determine the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel; the sending unit 420 is used to: send high-level signaling, The high-layer signaling is used to instruct the target TCI determined by the processing unit 410, and send the PDCCH on the control information resource according to the target TCI, the PDCCH carries downlink control information DCI; the sending unit 420 Also used to: send the first downlink channel according to the DCI and the target TCI.
  • the DCI does not carry indication information indicating the TCI corresponding to the first downlink channel.
  • the time difference between the transmission time of the PDCCH and the transmission time of the first downlink channel is greater than or equal to the first threshold.
  • the apparatus further includes: a receiving unit configured to receive capability information indicating that the terminal device can receive at least two PDCCHs; and/or, the sending unit 420 is further configured to transmit the first Configuration information, the first configuration information is used to configure the terminal device to receive at least two PDCCHs.
  • the processing unit 410 is specifically configured to: when at least one of the following conditions is met, determine the TCI corresponding to the PDCCH as the target TCI: the RNTI that scrambles the PDCCH is the first RNTI; Or, the search space corresponding to the PDCCH is the first search space; or, the format of the DCI is the first DCI format; or, the control information resource belongs to the first control information resource group; or, the priority of the DCI
  • the bit state of the level bit field is the first bit state.
  • the physical device corresponding to the processing unit is a processor
  • the physical device corresponding to the sending unit is a transmitter
  • the device 400 here is embodied in the form of a functional unit.
  • the term "unit” here may refer to an application-specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group) for executing one or more software or firmware programs Processor, etc.) and memory, merge logic, and/or other suitable components that support the described functions.
  • ASIC application specific integrated circuit
  • processor such as a shared processor, a proprietary processor or a group
  • memory merge logic, and/or other suitable components that support the described functions.
  • the apparatus 400 may specifically be the first network device in the foregoing embodiment, and the apparatus 400 may be used to execute various processes corresponding to the first network device in the foregoing method embodiment and /Or steps, to avoid repetition, they will not be repeated here.
  • the apparatus 300 and the apparatus 400 of the above solutions respectively have functions to implement the corresponding steps performed by the terminal device and the first network device in the above method; the functions may be implemented by hardware, or may be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions; for example, the sending unit may be replaced by a transmitter, the receiving unit may be replaced by a receiver, and other units, such as a determination unit, etc., may be replaced by processors, respectively executed
  • the devices in FIG. 3 and FIG. 4 may also be chips or chip systems, such as a system on chip (SoC).
  • the receiving unit and the sending unit may be the transceiver circuit of the chip, which is not limited herein.
  • FIG. 5 shows a possible structural diagram of the network device involved in the foregoing embodiment.
  • the network device 500 shown in FIG. 5 includes a transmitter/receiver 501, a controller/processor 502, and a memory 503.
  • the transmitter/receiver 501 is used to support the sending and receiving of information between the network device and the terminal device described in the above embodiments.
  • the controller/processor 502 performs various functions for communicating with terminal devices.
  • On the uplink the uplink signal from the terminal device is received via the antenna, mediated by the receiver 501, and further processed by the controller/processor 502 to recover the service data and signaling information sent by the terminal device .
  • On the downlink the service data and signaling messages are processed by the controller/processor 502 and mediated by the transmitter 501 to generate a downlink signal, which is transmitted to the terminal equipment via the antenna.
  • the controller/processor 502 also performs the processing procedures related to the network device in Embodiment 200 and/or other procedures for the technology described in this application.
  • the memory 503 is used to store program codes and data of network devices.
  • the controller/processor 502 is configured to: determine the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel, and according to the correspondence between the target TCI and the first information Relationship to determine the first information corresponding to the PDCCH; based on the first information and the target TCI determined by the processing unit; the transmitter/receiver 501 is configured to: send the PDCCH on a control information resource , The PDCCH carries downlink control information DCI.
  • the controller/processor 502 is used to: determine the TCI corresponding to the physical downlink control channel PDCCH as the target TCI corresponding to the first downlink channel; send high-level signaling through the transceiver 520, the high-level signal Let be used to indicate the target TCI determined by the processing unit, and send the PDCCH on the control information resource according to the target TCI, the PDCCH carrying downlink control information DCI.
  • the network device 500 may be specifically the first network device in the foregoing embodiments, and may be used to execute various steps and/or processes corresponding to the first network device in the foregoing method embodiments.
  • the memory 503 may include a read-only memory and a random access memory, and provide instructions and data to the controller/processor 502.
  • a portion of the memory 503 may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the controller/processor 502 can be used to execute the instructions stored in the memory, and when the controller/processor 502 executes the instructions stored in the memory, the controller/processor 502 is used to execute the above-mentioned first network device Various steps and/or processes of corresponding method embodiments.
  • FIG. 6 shows a simplified schematic diagram of a possible design structure of the terminal device involved in the foregoing embodiment.
  • the terminal device 600 shown in FIG. 6 includes a transmitter 601, a receiver 602, a controller/processor 603, a memory 604, and a modem processor 605.
  • the transmitter 601 is used to send an uplink signal, and the uplink signal is transmitted to the network device described in the foregoing embodiment via an antenna.
  • the antenna receives the downlink signal (DCI) transmitted by the network device in the above embodiment.
  • the receiver 602 is used to receive a downlink signal (DCI) received from an antenna.
  • the encoder 606 receives service data and signaling messages to be sent on the uplink, and processes the service data and signaling messages.
  • the modulator 607 further processes (eg, symbol mapping and modulation) the encoded service data and signaling messages and provides output samples.
  • Demodulator 605 processes (eg, demodulates) the input samples and provides symbol estimates.
  • the decoder 608 processes (eg, decodes) the symbol estimate and provides the decoded data and signaling messages sent to the terminal device.
  • the encoder 606, the modulator 607, the decoder 608, and the demodulator 609 may be implemented by a synthesized modem processor 605. These units are processed according to the wireless access technology adopted by the wireless access network.
  • the controller/processor 603 controls and manages the operation of the terminal device, and is used to execute the processing performed by the terminal device in the above-described embodiment 200.
  • the receiver 602 is configured to receive at least two physical downlink control channels PDCCH on at least two control information resources, the downlink control information DCI carried by the at least two PDCCHs is the same, and the DCI is used to indicate the first A time-frequency resource corresponding to a downlink channel;
  • the controller/processor 603 is used to: obtain at least two transmission configuration indication TCIs corresponding to the at least two control information resources, and determine a target from the at least two TCIs TCI, the target TCI is the TCI corresponding to the first downlink channel;
  • the receiver 602 is configured to receive the first downlink channel according to the target TCI determined by the DCI and the processing unit.
  • the terminal device 600 may be specifically the terminal device in the foregoing embodiments, and may be used to execute various steps and/or processes corresponding to the terminal device in the foregoing method embodiments.
  • the memory 604 may include a read-only memory and a random access memory, and provide instructions and data to the controller/processor 603. A portion of the memory 604 may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the controller/processor 603 may be used to execute instructions stored in the memory, and when the controller/processor 603 executes instructions stored in the memory, the controller/processor 603 is used to execute the above-mentioned corresponding to the terminal device Various steps and/or processes of method embodiments.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may be implemented or Perform the disclosed methods, steps, and logical block diagrams in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random access memory (random-access memory, RAM).
  • the memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiment of the present application may also be a circuit or any other device capable of realizing a storage function, which is used to store program instructions and/or data.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the relationship of the related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, B exists alone, where A B can be singular or plural.
  • the character “/” generally indicates that the related object is a “or” relationship.
  • “At least one of the following” or similar expressions refers to any combination of these items, including any combination of single items or plural items.
  • At least one (a) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c may be single or multiple.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, devices, or units, and may also be electrical, mechanical, or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or software function unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology, or all or part of the technical solution can be embodied in the form of a software product
  • the computer software product is stored in a storage medium
  • several instructions are included to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供了一种传输下行信道的方法和装置，能够提高下行信道传输的可靠性。该方法包括：终端设备在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，该至少两个PDCCH承载的下行控制信息DCI相同，该DCI用于指示第一下行信道对应的时频资源；该终端设备获取该至少两个控制信息资源对应的至少两个传输配置指示TCI；该终端设备从该至少两个TCI中确定目标TCI，该目标TCI为该第一下行信道对应的TCI；该终端设备根据该DCI和该目标TCI，接收该第一下行信道。

Description

传输下行信道的方法和装置
本申请要求于2019年1月10日提交中国专利局、申请号为201910024353.8、申请名称为“传输下行信道的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，特别涉及通信领域中的传输下行信道的方法和装置。
背景技术
网络设备会通过高层信令，针对检测物理下行控制信道(physical downlink control channel，PDCCH)的控制资源集(control resource set，CORESET)配置一个该PDCCH对应传输配置指示(transmission configuration indicator，TCI)的取值。当终端设备检测到PDCCH，可以根据该PDCCH所在的CORSET，确定该PDCCH对应的TCI。进一步地，网络设备也可以针对检测PDCCH的CORESET配置一个该PDCCH对应的TCI的指示域。TCI包含了一个准共址(quasi colocation，QCL)关系，该QCL关系是一个或两个下行参考信号与下行物理共享信道(physical downlink shared channel，PDSCH)的解调参考信号(demodulation reference signal，DMRS)之间的对应关系，根据该对应关系，终端设备可以根据一个PDCCH对应的TCI的指示域，确定出该PDCCH承载的DCI所指示的PDSCH对应的TCI。
若调度PDSCH的下行控制信息(downlink control information，DCI)(即承载在PDCCH上的DCI)中没有TCI指示域，终端设备就无法直接根据TCI指示域确定该PDSCH对应的TCI。在这种情况下，终端设备可以假设物理下行共享信道(physical downlink shared channel，PDSCH)的TCI与PDCCH的TCI相同，即将承载指示该PDSCH的DCI的PDCCH对应的TCI作为该PDSCH的TCI，进行PDSCH的数据接收。
但是，在多发射接收点(Tx/Rx point，TRP)传输场景中，即PDCCH可以由多个TRP重复传输，这样，终端设备会接收到多个TRP分别发送的多个PDCCH，该多个PDCCH上承载相同的DCI。在多个PDCCH承载的DCI指示同一个PDSCH的接收情况下，若调度PDSCH的DCI中没有TCI指示域，终端设备如何确定PDSCH对应的TCI是一个亟待解决的问题。
发明内容
本申请提供一种传输下行信道的方法和装置，能够确定下行信道对应的TCI，有利于提高下行信道传输的可靠性。
第一方面，提供了一种传输下行信道的方法，包括：终端设备在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，所述至少两个PDCCH承载的下行控制信 息DCI相同，所述DCI用于指示第一下行信道对应的时频资源，所述终端设备获取所述至少两个控制信息资源对应的至少两个传输配置指示TCI，从所述至少两个TCI中确定目标TCI，所述目标TCI为所述第一下行信道对应的TCI，所述终端设备根据所述DCI和所述目标TCI，接收所述第一下行信道。
本申请实施例的传输下行信道的方法，在至少两个网络设备通过至少两个控制信息资源向终端设备发送承载相同DCI的PDCCH的情况下，通过终端设备根据一定规则从至少两个TCI中确定目标TCI，用于该DCI所指示的第一下行信道的传输，能够解决存在多个控制信息资源对应多个TCI的情况下，终端设备无法准确地确定第一下行信道对应的TCI的问题，有利于提高下行信道传输的可靠性，从而提高系统性能。
应理解，上述第一下行信道可以为PDSCH，也可以为PDCCH，还可以为其他任意的下行信道。上述控制信息资源用于表示传输PDCCH所采用的时频域资源，例如，控制资源集(control-resource set，CORESET)，或者，其他用于承载PDCCH的时频域资源。上述控制信息资源可以和第一下行信道所在时频资源和/或频域资源存在重叠，也可以不重叠。可选地，控制信息资源也可以和上行信道所在的时频资源和/或频域资源存在重叠，本申请对于控制信息资源在时域资源和频域资源不做限定。
结合第一方面，在第一方面的某些实现方式中，所述终端设备从所述至少两个TCI中确定目标TCI，包括：所述终端设备根据下列信息中的至少一个，从所述至少两个TCI中确定目标TCI：所述至少两个PDCCH所在的搜索空间的标识；或者，所述至少两个PDCCH所在的搜索空间的类型；或者，所述至少两个PDCCH对应的检测周期；或者，所述至少两个PDCCH对应的控制信息资源的数量；或者，所述至少两个PDCCH对应的控制信息资源的时域位置；或者，所述至少两个PDCCH对应的候选PDCCH索引；或者，所述至少两个PDCCH对应的控制资源元素CCE索引；或者，所述至少两个PDCCH对应的资源元素组REG索引；或者，所述至少两个PDCCH对应的无线网络临时标识RNTI；或者，所述至少两个PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，所述至少两个PDCCH的控制信息资源的索引；或者，所述至少两个TCI的索引。
具体地，第一网络设备和终端设备可以通过隐式的方式，按照一定的规则确定目标TCI。这样，第一网络设备和终端设备可以准确确定目标TCI，提高第一下行信道传输的可靠性，还可以不增加网络设备发送给终端设备的DCI的比特数，提高DCI的解调性能。
在一种可能的实现方式中，终端设备还可以结合上述多种情况进行综合判断，保证最终选择出一个TCI作为目标TCI。下面对多种情况结合的方法进行详细说明，该方法可以包括下列步骤：
步骤一，终端设备根据情况A，确定候选TCI；
步骤二，若上述候选TCI包括一个TCI，那么该终端设备将该候选TCI确定为目标TCI。若上述候选TCI包括多个TCI，那么该终端设备不再考虑步骤一对应的情况，可以再根据步骤一对应的情况以外的一个情况B，从上述候选TCI中确定新的候选TCI，若新的候选TCI包括多个TCI，则重新执行步骤一，直到确定出唯一的目标TCI为止。可以理解的是，每个情况只使用一次来筛选候选TCI，在使用过一次之后，则会使用其他未进行判断的情况中的一种或多种进行确定候选TCI。
应理解，情况A与情况B不同。
结合第一方面，在第一方面的某些实现方式中，在所述终端设备从所述至少两个TCI中确定目标TCI之前，所述方法还包括：所述终端设备接收高层信令，所述高层信令用于指示所述目标TCI。
具体地，可以通过显示的方式向终端设备指示第一下行信道对应的目标TCI。第一网络设备可以向终端设备发送高层信令用于指示目标TCI，但应理解，该目标TCI仍为上述至少两个TCI中的一个。由于目标TCI(即第一TCI)对应第一控制信息资源，这相当于为终端设备半静态配置了第一下行信道对应的第一控制信息资源，即半静态配置了第一网络设备向终端设备发送第一下行信道。在本实施例中，高层信令是第一网络设备发送给终端设备的，但应理解，在具体实现中，该高层信令还可以是其他网络设备或者节点发送给该终端设备的，本申请实施例对此不作限定。上述高层信令可以是针对服务小区配置的，也可以是针对HARQ进程号配置的，还可以是针对码字配置的，或者可以是针对DCI配置的，本申请实施例对此也不作限定。
结合第一方面，在第一方面的某些实现方式中，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
换句话说，上述至少两个控制信息资源中的第一个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息；或者，所述第一DCI的格式为第一格式，例如，第一格式为DCI format 1_0；或者，上述至少两个控制信息资源中的任一个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息；或者，上述至少两个控制信息资源中的最后一个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息；或者，上述至少两个控制信息资源中的多个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息。
应理解，针对多TRP传输的场景，可能存在一次发送PDCCH对应的控制信息资源没有被配置TCI指示域，由于需要发送相同的DCI，因此，无论所有的PDCCH对应的控制信息资源有没有被配置TCI指示域，所发送的DCI都不会包括TCI指示域。
还应理解，上述第一个控制信息资源可以理解为时域上起始符号最早，和/或终止符号最早，和/或时隙索引的控制信息资源。若至少两个控制信息资源的起始符号和/或终止符号，和/或时隙索引均相同，那么第一个控制信息资源可以理解为频域资源(例如REG或CCE索引)最小的控制信息资源。
结合第一方面，在第一方面的某些实现方式中，所述目标TCI对应的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
应理解，在本申请实施例中，为保证下行信道的正确传输，PDCCH的传输时间与第一下行信道的传输时间之间的时间差需要大于或等于一个调度阈值，本申请称为第一阈值。因此，终端设备所选择出的目标TCI对应的PDCCH的传输时间与第一下行信道的传输时间之间的时间差需要大于或等于第一阈值。该第一阈值可以是预先定义的，也可以是网络设备通过信令为终端设备配置的，还可以是终端设备上报的，本申请实施例对此不作限定。
结合第一方面，在第一方面的某些实现方式中，所述至少两个PDCCH中最后一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第二阈值；或者，所述至少两个PDCCH中第一次传输的PDCCH的传输时间与所述第一下行信 道的传输时间之间的时间差大于或等于所述第二阈值。
上述第二阈值可以等于第一阈值，该第二阈值可以是预先定义的，也可以是网络设备通过信令为终端设备配置的，还可以是终端设备上报的，本申请实施例对此不作限定。
上述第一次传输可以理解为采用时域上起始符号最早，和/或终止符号最早，和/或时隙索引最小的控制信息资源传输PDCCH。若至少两个控制信息资源的起始符号，和/或终止符号，和/或时隙索引均相同，那么第一次传输可以理解为采用频域资源(例如REG或CCE索引)最小的控制信息资源传输PDCCH。同理，上述最后一次传输可以理解为采用时域上起始符号最晚，和/或终止符号最晚，和/或时隙索引最大的控制信息资源传输PDCCH。若至少两个控制信息资源的起始符号，和/或终止符号，和/或索引均相同，那么第一次传输可以理解为采用频域资源(例如REG或CCE索引)最大的控制信息资源传输PDCCH。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述终端设备发送能力信息，所述能力信息用于表示所述终端设备能够接收至少两个PDCCH；和/或，所述终端设备接收第一配置信息，所述第一配置信息用于配置所述终端设备接收至少两个PDCCH。
应理解，网络设备可以基于终端设备上报的能力信息向终端设备发送第一配置信息，也可以不基于终端设备上报的能力信息(或者在终端设备没有上报能力信息的情况下)向终端设备发送第一配置信息。应理解，至少两个PDCCH的重复次数可以是高层信令配置的，也可以是预先定义的。在本实施例中，终端设备向网络设备上报能力信息，可以使网络设备根据需求灵活配置是否进行PDCCH重复传输，从而灵活适应多个不同场景。
结合第一方面，在第一方面的某些实现方式中，所述终端设备从所述至少两个TCI中确定目标TCI，包括：在满足下列条件中的至少一个的情况下，所述终端设备从所述至少两个TCI中确定目标TCI：加扰所述至少两个PDCCH的RNTI为第一RNTI；或者，所述至少两个PDCCH对应的搜索空间为第一搜索空间；或者，所述DCI的格式为第一DCI格式；或者，所述至少两个控制信息资源属于第一控制信息资源组；或者，所述DCI的优先级比特域的比特状态为第一比特状态。
具体地，在满足上述条件中的至少一个的情况下，终端设备才可以采用本申请实施例的方法来确定第一下行信道对应的TCI。上述第一RNTI、第一搜索空间、第一格式、或者第一控制信息资源组、或者第一比特状态，可以是预先定义的，也可以是网络设备通过高层信令配置给该终端设备的。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述终端设备接收第二配置信息，所述第二配置信息用于配置所述第一RNTI、所述第一搜索空间、所述第一DCI格式、或者所述第一控制信息资源组、或者所述DCI的优先级比特域的比特状态中的至少一个。
可选地，上述终端设备还可以根据DCI所指示的第一下行信道的时频资源，来确定是否采用本申请实施例的方法确定第一下行信道对应的TCI。具体地，该终端设备可以在上述第一下行信道的时频资源满足下列条件中的至少一个的情况下，采用本申请实施例的方法从至少两个TCI中确定目标TCI：第一下行信道的资源索引属于第一索引集合；或者，第一下行信道的时域资源长度属于第一时域长度；或者，第一下行信道的传输时间的传输 时间偏移量属于第一偏移量集合。
结合第一方面，在第一方面的某些实现方式中，所述DCI包括第一指示信息，所述第一指示信息用于指示所述至少两个TCI中的一个；所述终端设备从所述至少两个TCI中确定目标TCI，包括：所述终端设备根据所述第一指示信息，确定所述目标TCI。
示例性地，网络设备可以在DCI中引入1bit的指示域，或者令TCI的指示域为1bit，来指示目标TCI。例如，0用于指示目标TCI为第一控制信息资源对应的第一TCI，1用于指示目标TCI为第二控制信息资源对应的第二TCI；或者，1用于指示目标TCI为第一控制信息资源对应的第一TCI，0用于指示目标TCI为第二控制信息资源对应的第二TCI。终端设备在接收到该DCI之后，便可以直接根据该DCI中的1bit指示域，确定第一下行信道对应的目标TCI。
第二方面，提供了另一种传输下行信道方法，包括：第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI，根据所述目标TCI与第一信息之间的对应关系，确定所述PDCCH对应的第一信息，所述第一网络设备根据所述第一信息和所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI；所述第一网络设备根据所述DCI和所述目标TCI，发送所述第一下行信道。
结合第二方面，在第二方面的某些实现方式中，所述第一信息为下列信息中的至少一个：所述PDCCH所在的搜索空间的标识；或者，所述PDCCH所在的搜索空间的类型；或者，所述PDCCH对应的检测周期；或者，所述PDCCH对应的控制信息资源的数量；或者，所述PDCCH对应的控制信息资源的时域位置；或者，所述PDCCH对应的候选PDCCH索引；或者，所述PDCCH对应的控制资源元素CCE索引；或者，所述PDCCH对应的资源元素组REG索引；或者，所述PDCCH对应的无线网络临时标识RNTI；或者，所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，所述至少两个PDCCH的控制信息资源的索引；或者，所述至少两个TCI的索引。
结合第二方面，在第二方面的某些实现方式中，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
结合第二方面，在第二方面的某些实现方式中，所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第一网络设备接收能力信息，所述能力信息用于表示终端设备能够接收至少两个PDCCH；和/或，所述第一网络设备发送第一配置信息，所述第一配置信息用于配置终端设备接收至少两个PDCCH。
结合第二方面，在第二方面的某些实现方式中，所述第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI，包括：在满足下列条件中的至少一个的情况下，所述第一网络设备将所述PDCCH对应的TCI确定为所述目标TCI：加扰所述PDCCH的RNTI为第一RNTI；或者，所述PDCCH对应的搜索空间为第一搜索空间；或者，所述DCI的格式为第一DCI格式；或者，所述控制信息资源属于第一控制信息资源组；或者，所述DCI的优先级比特域的比特状态为第一比特状态。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第一网络设备发送第二配置信息，所述第二配置信息用于配置所述第一RNTI、所述第一搜索空间、所 述第一DCI格式、或者所述第一控制信息资源组、或者所述DCI的优先级比特域的比特状态中的至少一个。
第三方面，提供了另一种传输下行信道方法，包括：第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI；所述第一网络设备发送高层信令，所述高层信令用于指示所述目标TCI；所述第一网络设备根据所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI；所述第一网络设备根据所述DCI和所述目标TCI，发送所述第一下行信道。
结合第三方面，在第三方面的某些实现方式中，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
结合第三方面，在第三方面的某些实现方式中，所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
结合第三方面，在第三方面的某些实现方式中，所述方法还包括：所述第一网络设备接收能力信息，所述能力信息用于表示终端设备能够接收至少两个PDCCH；和/或，所述第一网络设备发送第一配置信息，所述第一配置信息用于配置终端设备接收至少两个PDCCH。
结合第三方面，在第三方面的某些实现方式中，所述第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI，包括：在满足下列条件中的至少一个的情况下，所述第一网络设备将所述PDCCH对应的TCI确定为所述目标TCI：加扰所述PDCCH的RNTI为第一RNTI；或者，所述PDCCH对应的搜索空间为第一搜索空间；或者，所述DCI的格式为第一DCI格式；或者，所述控制信息资源属于第一控制信息资源组；或者，所述DCI的优先级比特域的比特状态为第一比特状态。
结合第三方面，在第三方面的某些实现方式中，所述方法还包括：所述第一网络设备发送第二配置信息，所述第二配置信息用于配置所述第一RNTI、所述第一搜索空间、所述第一DCI格式、或者所述第一控制信息资源组、或者所述DCI的优先级比特域的比特状态中的至少一个。
第四方面，提供了另一种传输下行信道方法，包括：第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI；所述第一网络设备根据所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI，所述DCI中携带第一指示信息，所述第一指示信息用于指示所述目标TCI；所述第一网络设备根据所述DCI和所述目标TCI，发送所述第一下行信道。
第五方面，提供了一种传输下行信道的装置，该装置具有实现上述方法实际中终端设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述模块可以是软件和/或硬件。
在一个可能的设计中，所述装置的结构中包括接收器与处理器，所述接收器被配置为支持所述装置在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，以及根据所述DCI和所述处理器确定的所述目标TCI，接收所述第一下行信道。所述处理器获取所述至少两个控制信息资源对应的至少两个传输配置指示TCI，以及从所述至少两个TCI中确定目标TCI。
第六方面，提供了另一种传输下行信道的装置，该装置具有实现上述方法实际中网络 设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，所述装置结构中包括处理器与发射器，所述处理器被配置为支持网络设备执行上述方法中相应的功能。所述发射器用于用于支持网络设备与终端设备之间的通信，例如根据所述第一信息和所述处理单元确定的所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI。所述网络设备还可以包括存储器，所述存储器用于与处理器耦合，其保存网络设备必要的程序指令和数据。
第七方面，本申请实施例还提供了一种计算机可读存储介质，包括：计算机软件指令；当计算机软件指令在信息指示装置中运行时，使得所述传输下行信道的装置执行上述各个方面或各个方面的任一种可能实现方式中的方法。
第八方面，本申请实施例还提供了一种包含指令的计算机程序产品，当计算机程序产品在信息指示装置中运行时，使得该传输下行信道的装置执行上述各个方面或各个方面的任一种可能的实现方式中的方法。
第九方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述方法中网络设备或终端设备的功能。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十方面，本申请实施例还提供了一种通信系统，所述通信系统包括第三方面描述的终端设备或支持终端设备实现该第一方面描述的方法的传输下行信道的装置，以及第四方面描述的网络设备或支持网络设备实现该第二方面描述的方法的传输下行信道的装置；
另外，上述任意方面的设计方式所带来的技术效果可参见第一方面和第二方面中不同设计方式所带来的技术效果，此处不再赘述。
本申请实施例中，终端设备、网络设备和传输下行信道的装置的名字对设备本身不构成限定，在实际实现中，这些设备可以以其他名称出现。只要各个设备的功能和本申请实施例类似，属于本申请权利要求及其等同技术的范围之内。
附图说明
图1示出了本申请实施例的应用场景的示意图；
图2示出了本申请实施例的传输下行信道的方法的示意性流程图；
图3示出了本申请实施例的传输下行信道的装置的示意性框图；
图4示出了本申请实施例的传输下行信道的另一装置的示意性框图；
图5示出了本申请实施例的网络设备的示意性框图；
图6示出了本申请实施例的终端设备的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通信(global system for mobile communications，GSM)系统、码分多址接入(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(Long Term  Evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统、未来的第五代(5th generation，5G)系统或新无线(new radio，NR)等。
本申请实施例中的终端设备可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备，或者NR通信系统中的终端设备等等，本申请实施例对此并不限定。
作为示例而非限定，在本发明实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备可以是全球移动通信(global system for mobile communications，GSM)系统或码分多址(Code Division Multiple Access，CDMA)中的基站(base transceiver station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(evolved NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，C-RAN)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的PLMN网络中的网络设备，或者NR系统中的新一代基站(new generation NodeB,gNodeB)等等，本申请实施例并不限定。
另外，在本申请实施例中，网络设备为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源或者频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)、毫微微小区(femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
在本申请实施例中，终端设备或网络设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。 该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于：磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
下面，先介绍一下本申请的相关基础知识。
移动通信技术已经深刻地改变了人们的生活，但人们对更高性能的移动通信技术的追求从未停止。为了应对未来爆炸性的移动数据流量增长、海量移动通信的设备连接、不断涌现的各类新业务和应用场景，第五代(5th Generation，5G)移动通信系统应运而生。国际电信联盟(International Telecommunication Union，ITU)为5G以及未来的移动通信系统定义了三大类应用场景：增强型移动宽带(Enhanced Mobile Broadband，eMBB)、高可靠低时延通信(Ultra-Reliable and Low-Latency Communications，URLLC)以及海量机器类通信(Massive Machine-Type Communications，mMTC)。
典型的URLLC业务有：工业制造或生产流程中的无线控制、无人驾驶汽车和无人驾驶飞机的运动控制以及远程修理、远程手术等触觉交互类应用，这些业务的主要特点是要求超高可靠性、低延时，传输数据量较少以及具有突发性。典型的mMTC业务有：智能电网配电自动化、智慧城市等，主要特点是联网设备数量巨大、传输数据量较小、数据对传输时延不敏感，这些mMTC终端需要满足低成本和非常长的待机时间的需求。典型的eMBB业务有：超高清视频、增强现实(augmented reality，AR)、虚拟现实(virtual reality，VR)等，这些业务的主要特点是传输数据量大、传输速率很高。
应理解，NR系统支持各种时间调度单元，长度可以为一个或多个时域符号。该时域符号可以是正交频分复用符号(orthogonal frequency division multiplexing，OFDM)。其中OFDM符号可以使用转换预编码(transform precoding)，也可以不使用转换预编码。如果OFDM符号使用了转换预编码，又可以被称为单载波频分复用(single carrier-frequency division multiplexing，SC-FDM)。NR系统是由时隙(slot)组成的，一个slot可以包括14个符号。NR系统还支持多种子载波间隔。不同的子载波间隔下slot对应的时间长度可以不同。例如，当子载波间隔为15kHz，那么一个slot对应的时间长度可以为1ms。又例如，当子载波间隔30kHz，那么一个slot对应的时间长度可以为0.5ms。又例如，当子载波间隔60kHz，那么一个slot对应的时间长度可以为0.25ms。再例如，当子载波间隔 120kHz，那么一个slot对应的时间长度可以为0.125ms。应理解，由于一个时隙的符号数可以配置成一个固定的数值，例如，14个符号，因此，符号对应的时间长度也可以随着子载波间隔的变化而变化。
时频域资源包括时域资源和/或频域资源。频域资源可以是一个或多个资源块(resource block，RB)，也可以是一个或多个资源单元(resource element，RE)，也可以是一个或多个载波/小区，也可以是一个或多个部分带宽(bandwidth part，BWP)，也可以是一个或多个载波上的一个或多个BWP上的一个或多个RB，还可以是一个或多个载波上的一个或多个BWP上的一个或多个RB上的一个或多个RE。时域资源可以是一个或多个时隙，也可以是一个或多个时隙上的一个或多个符号。
在无线通信系统中，上行数据传输(终端设备向网络设备发送数据)或下行数据传输(网络设备向终端设备发送数据)都需要传输参考信号。这是因为接收端在进行数据译码之前，需要使用参考信号对信道进行信道估计，进而使用信道估计的结果将空间信道对数据的影响消除掉，从而进行译码。
对于下行传输来说，如果是基于动态调度的，那么终端设备会接收到下行控制信息DCI用于指示PDSCH，此DCI中会携带用于指示该PDSCH占用的时频域资源、调制方式等指示信息。终端设备接收到DCI，就可以确定在哪个资源上接收PDSCH。进一步地，终端设备接收PDSCH之后，可以将最终译码的结果反馈给网络设备。其中，如果终端设备对PDSCH接收正确则反馈的信息为肯定答复(acknowledgment，ACK)，如果终端设备对PDSCH接收错误则反馈的信息为否定答复(negative acknowledgment，NACK)。上述ACK和NACK在通信系统中可以统称为混合自动重传请求(hybrid automatic repeat request，HARQ)信息。一般情况下，终端设备都会反馈PDSCH对应的HARQ信息，以便于网络设备在获知终端设备错误接收后可以快速对终端设备进行重新传输，以保证数据传输的可靠性。
为便于理解，下面先对本文涉及的相关术语进行介绍。
1、控制资源元素(control-channel element，CCE)
一个PDCCH信道是被一个或多个CCE组成的。而确定一个PDCCH具体是由几个CCE组成，是由聚合等级(aggregation level)来描述的。示例性地，CCE和聚合等级的对应关系可以如表一所示。
表一
聚合等级 控制资源元素的数量
1 1
2 2
4 4
8 8
16 16
2、资源单元组(resource element group，REG)
一个CCE可以由6个资源单元组REG组成。这里，一个REG所对应的资源，在频域上为一个RB，在时域上为一个OFDM符号。在CORESET中，REG的计数是先时域后 频域，即REG 0是从CORESET所在的第一个符号，以及最小的资源块开始。
一个PDCCH对应的CCE与REG的映射关系是可以配置的。这里可以将CCE理解为逻辑资源，将REG理解为实际资源。从逻辑资源到实际资源的映射可以通过多种方式。但是，对于一个特定的CORESET来说，该CORESET只对应一种CCE到REG的映射方式。
3、控制资源集(control resource set，CORESET)
一个CORESET是包含多个REG的物理资源。一个CORESET在时域上可以占用1、2或者3个符号，在频域上可以占用一个或多个资源块。CORESET是通过高层信令配置的。一个CORESET中可以包括多个搜索空间，且一个搜索空间可以对应至少一个CORESET。一般情况下，可以通过预先定义或者网络设备通过高层信令配置的方式，为一个CORESET配置一个传输配置指示(transmission configuration indicator，TCI)。终端设备可以根据PDCCH所在的CORESET，确定出与该PDCCH对应的TCI。
4、搜索空间(search space)
终端设备可以监听一个或多个搜索空间，从而获取对应的DCI，每个搜索空间的标识与一个CORESET的标识关联。搜索空间一般可以分为：公共搜索空间(common search space，CSS)和用户特定的搜索空间(UE-specific search space，USS)。
一个终端设备可以监听的一组候选PDCCH被定义为PDCCH搜索空间集合(search space set)。一个搜索空间集合的类型可以包括：公共搜索空间集合(common search space set)和用户专用搜索空间集合(UE-specific search space set)。其中，公共搜索空间集合又可以包括：Type 0-PDCCH公共搜索空间集合、Type0A-PDCCH公共搜索空间集合、Type 1-PDCCH公共搜索空间集合、Type 2-PDCCH公共搜索空间集合、Type 3-PDCCH公共搜索空间集合等等。
5、无线网络标识(radio network temporary identifier，RNTI)
每个PDCCH会使用RNTI对PDCCH的循环冗余校验(cyclic redundancy check，CRC)进行加扰，终端设备也可以通过RNTI来区别不同的PDCCH。
RNTI可以包括：系统信息RNTI(system information RNTI，SI-RNTI)、随机接入RNTI(random access RNTI，RA-RNTI)、临时小区RNTI(temporary cell RNTI，TC-RNTI)、寻呼RNTI(paging RNTI，P-RNTI)、小区RNTI(cell-RNTI，C RNTI)、配置调度RNTI(configured scheduling-RNTI，CS-RNTI)、调制编码方式小区RNTI(modulation and coding scheme cell RNTI，MCS-C-RNTI)等等。一般而言，用户专用搜索空间集合中的PDCCH的CRC只可以被C-RNTI、CS-RNTI和MCS-C-RNTI加扰。
6、DCI格式(DCI format)
DCI格式可以包括：DCI格式1_0、DCI格式1_1、DCI格式1_2、DCI格式0_0、DCI格式0_1、DCI格式0_2等。其中，DCI格式1_2对应的比特数小于DCI格式1_0对应的比特数，例如，小于或等于10bits-16bits。其中，DCI格式0_2对应的比特数小于DCI格式0_0对应的比特数，例如，小于或等于10bits-16bits。
7、传输配置指示(transmission configuration indicator，TCI)
一个TCI包含了一个准共址(quasi co-location，QCL)关系，这个关系是一个或两个下行参考信号与下行物理共享信道PDSCH的解调参考信号DMRS之间的对应关系。TCI 状态指示域是用来指示TCI的指示域，这个指示域可以在DCI中，也可以在MAC层的信令中。
上述准共址关系可以是以下类型中的一种：
准共址类型A(QCL-Type A)：终端设备假设此时下行参考信号与PDSCH的DMRS之间的{多普勒频移(doppler shift)，多普勒扩展(doppler spread)，平均时延(average delay)，时延扩展(delay spread)}都相同。
准共址类型B(QCL-Type B)：终端设备假设此时下行参考信号与PDSCH的DMRS之间的{多普勒频移，多普勒扩展}相同。
准共址类型C(QCL-Type C)：终端设备假设此时下行参考信号与PDSCH的DMRS之间的{平均时延，时延扩展}相同。
准共址类型D(QCL-Type D)：终端设备假设此时下行参考信号与PDSCH的DMRS之间的{空间接收天线参数(spatial Rx parameter)}相同。
应理解，高层信令可以包含高层信令trs-info和高层信令repetition两类。其中，高层信令trs-info用于指示在一个CSI-RS资源集合中所有NZP CSI-RS资源对应的天线端口相同，高层信令repetition用于指示on或off，若高层信令repetition指示off或网络没备没有向终端设备发送高层信令repetition，那么终端设备不会假设在资源集合中所有NZP CSI-RS资源对应相同的天线端口数和相同的下行空间传输滤波器。
示例性地，以第二下行参考信号被配置为例，根据具体配置可以分下列五种情况：
(1)对于周期信道状态信息参考信号(channel state information reference signal，CSI-RS)，如果此周期CSI-RS被网络设备发送的高层信令trs-info配置在非零功率信道状态信息参考信号(non-zero power channel state information reference signal，NZP CSI-RS)上，TCI状态指示域可以按照表二所示的对应关系指示QCL类型：
表二
Figure PCTCN2020070070-appb-000001
(2)对于非周期CSI-RS发送的高层信令trs-info配置在NZP CSI-RS，TCI状态指示 域可以按照表三所示的对应关系指示QCL类型：
表三
Figure PCTCN2020070070-appb-000002
(3)对于CSI-RS没被网络设备发送的高层信令trs-info或高层信令repetition配置在NZP CSI-RS上，TCI状态指示域可以按照表四所示的对应关系指示QCL类型：
表四
Figure PCTCN2020070070-appb-000003
(4)对于CSI-RS被网络设备发送的高层信令repetition配置在NZP CSI-RS上，TCI状态指示域可以按照表五所示的对应关系指示QCL类型：
表五
Figure PCTCN2020070070-appb-000004
Figure PCTCN2020070070-appb-000005
(5)对于解调参考信号DMRS，TCI状态指示域可以按照表六所示的对应关系指示QCL类型：
表六
Figure PCTCN2020070070-appb-000006
示例性地，以第二下行参考信号没有被配置为例，表二到表六中只存在TCI状态指示域、第一下行参考信号和第一下行参考信号对应的QCL类型对应的列。
为了提高在小区用户的速率体验，NR中引入了多TRP传输的场景，该多个TRP之间可以是理想回程，也可以是非理想回程。其中，理想回程的含义为多TRP间交互信息是没有时延的，即该多个TRP之间可以随时快速任意交互数据或控制信息；而非理想回程的含义为多TRP间交互信息是有时延的，即该多个TRP之间不能快速交互信息，或者只能缓慢交互信息。
一种典型的多TRP传输场景可以是：多个TRP发送携带相同DCI的PDCCH，该多个TRP中的一个TRP发送PDSCH。这是因为引入多TRP进行重复DCI(repetition DCI)传输，有利于获取分集增益，提高PDCCH可靠性。此外，PDSCH的传输来自于其中一个TRP(例如，信号噪声干扰比(signal to interference plus noise ratio，SINR)最好的TRP)，使得PDSCH可以使用合适的频谱效率，也可以保证PDSCH传输的可靠性。
图1示出了本申请实施例的应用场景100。该应用场景100可以包括第一网络设备110、第二网络设备120和终端设备130。其中，第一网络设备110可以向终端设备130发送PDCCH 1，该PDCCH 1承载DCI 1，该DCI 1用于指示第一下行信道(例如，PDSCH，可以是一个或多个传输块，也可以是一个或多个码字)对应的时频资源。第二网络设备120可以向终端设备130发送PDCCH 2，该PDCCH 2也承载DCI 1，指示相同的第一下行信道的时频资源。此时为重复传输DCI，即PDCCH 1和PDCCH 2中承载相同的内容。上述PDCCH 1和PDCCH 2可以在相同的时频资源上发送，也可以在不同的时频资源上发 送，本申请实施例对此不作限定。
因此，终端设备130可以在相同或不同的时频域资源上接收来自第一网络设备110的PDCCH 1和来自第二网络设备120的PDCCH 2，当终端设备130获取到这两个PDCCH中的DCI 1之后，该终端设备130就可以根据该DCI 1中的指示信息，对后续来自第一网络设备110的第一下行信道进行解码，进而得到该第一下行信道的译码结果。
应理解，图1示例性地示出了两个网络设备和一个终端设备，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。可选地，该无线通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例不限于此。
一般情况下，网络设备会通过高层信令，针对检测PDCCH的控制信息资源配置一个TCI的取值。当终端设备检测到PDCCH，根据该PDCCH所在的CORSET，就能确定该PDCCH对应的TCI。进一步地，网络设备也可以针对检测PDCCH的CORESET配置一个TCI指示域。终端设备根据该PDCCH承载的DCI中的一个TCI指示域，就能确定该PDCCH承载的DCI指示的该第一下行信道对应的TCI。
若网络设备针对检测PDCCH的CORESET没有配置TCI指示域，即调度第一下行信道的DCI(即在CORESET中检测到的PDCCH上的DCI)中没有TCI指示域，终端设备就无法确定该第一下行信道对应的TCI。这时，终端设备可以假设第一下行信道的TCI与PDCCH的TCI相同，即将PDCCH的TCI作为第一下行信道的TCI，进行第一下行信道的数据接收。
但是，在上述应用场景100(即多TRP传输场景)中，DCI由多个网络设备通过多个PDCCH重复传输，而第一下行信道来自于该多个网络设备中的一个或多个网络设备(例如，第一网络设备110)，这样，终端设备会接收到多个网络设备分别发送的多个PDCCH，该多个PDCCH上承载相同的DCI。换句话说，这种场景可以通过多个PDCCH指示同一个第一下行信道的接收。由于多个网络设备到终端设备的空间地址位置不同，所以不同的网络设备对应的TCI可能是不同的，不同的网络设备可以在不同的CORESET上发送PDCCH，而这些CORESET被配置对应不同的TCI。终端设备接收到来自多个网络设备通过不同的CORESET发送的PDCCH，此时，该终端设备将无法确定第一下行信道所对应的TCI，进而无法准确进行第一下行信道的接收，从而影响第一下行信道传输的可靠性。
有鉴于此，本申请实施例提出了一种新的传输下行信道的方法，通过终端设备根据一定规则或者网络设备的指示，从多个不同的CORESET对应的多个TCI中确定目标TCI，用于上述第一下行信道的传输，有利于提高下行信道传输的可靠性，从而提高系统性能。
图2示出了本申请实施例的传输下行信道的方法200的示意性流程图。该方法200可以应用于图1所示的应用场景100，但本申请实施例不限于此。
S210，第一网络设备将第一PDCCH对应的第一TCI确定为目标TCI。
S220，该第一网络设备在第一控制信息资源上发送第一PDCCH，该第一PDCCH承载DCI。例如，第一DCI，该第一DCI用于指示第一下行信道对应的时频资源。该第一DCI所指示的第一下行信道对应的TCI为上述目标TCI。
S230，第二网络设备在第二控制信息资源上发送第二PDCCH，该第二PDCCH承载上述第一DCI。
在该应用场景中，可能还存在更多数量的网络设备在控制信息资源上发送PDCCH，该PDCCH承载第一DCI。因此，对应地，终端设备可以在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，该至少两个PDCCH包括上述第一网络设备在第一控制信息资源上发送的第一PDCCH和上述第二网络设备在第二控制信息资源上发送的第二PDCCH，且该至少两个PDCCH承载的DCI相同，均为第一DCI。
S240，该终端设备可以接收至少两个网络设备在至少两个控制信息资源上发送的至少两个PDCCH，从而获取该至少两个控制信息资源对应的至少两个TCI。
S250，该终端设备从该至少两个TCI中确定目标TCI，该目标TCI为该第一下行信道对应的TCI。
应理解，上述S210的执行在S220之前，但S230的执行可以在S220之前，也可以在S220之后，还可以与S220同时执行，本实施例对S220和S230的先后顺序不作限定。
作为一个可选的实施例，所述方法还包括：第一网络设备可以根据上述目标TCI与第一信息之间的对应关系，确定第一PDCCH对应的第一信息；该第一网络设备根据该第一信息和该目标TCI，在第一控制信息资源上发送第一PDCCH。这样，在S250中，终端设备可以根据第一信息，从该至少两个TCI中确定目标TCI。即第一网络设备和终端设备可以通过隐式的方式，按照第一信息确定目标TCI。该第一信息可以是预先定义的，也可以是网络设备通过信令为终端设备配置的。
作为一个可选的实施例，所述方法还包括：第一网络设备发送高层信令，该高层信令用于指示上述目标TCI。对应地，终端设备接收该第一网络设备发送的高层信令。在S250中，终端设备可以直接根据该高层信令确定目标TCI。
本申请实施例的传输下行信道的方法，在至少两个网络设备通过至少两个控制信息资源向终端设备发送承载相同DCI的PDCCH的情况下，通过终端设备根据一定规则从至少两个TCI中确定目标TCI，用于该DCI所指示的第一下行信道的传输，能够解决存在多个控制信息资源对应多个TCI的情况下，终端设备无法准确地确定第一下行信道对应的TCI的问题，有利于提高下行信道传输的可靠性，从而提高系统性能。
进一步地，第一网络设备或第二网络设备可以根据第一DCI和该目标TCI(例如，第一控制信息资源对应的TCI)，向终端设备发送第一下行信道；则对应地，所述终端设备可以根据所述第一DCI和所述目标TCI，接收所述第一下行信道。应理解的，这里发送第一下行信道的网络设备可以是一个网络设备，也可以是多个网络设备，本申请实施例对此不作限定。在一种可能的实现方式中，若第一网络设备确定了目标TCI，而第二网络设备发送第一下行信道，该第一网络设备可以将用于指示该目标TCI的指示信息发送给该第二网络设备，以便该第二网络设备根据该目标TCI发送第一下行信道。
示例性地，为便于描述，接下来以至少两个网络设备包括第一网络设备和第二网络设备为例进行说明。但应理解，本申请实施例对重复传输PDCCH的网络设备的数量并不作限定。
具体而言，第一网络设备和第二网络设备向终端设备发送均承载相同的DCI(即第一DCI)的PDCCH。该第一DCI用于指示第一下行信道对应的时频资源，但是，该第一DCI中不携带用于指示第一下行信道的TCI的指示域。在本申请实施例中，例如，第一网络设备和第二网络设备会预先协商好由第一网络设备将该第一网络设备发送的第一PDCCH (即对应的第一控制信息资源)对应的第一TCI确定为目标TCI。应理解，由于多个网络设备到终端设备的空间地理位置不同，不同的网络设备对应的TCI是不同的，因此，不同的网络设备会对应不同的控制信息资源，即不同的网络设备会采用不同的控制信息资源发送PDCCH。换句话说，第一PDCCH是在第一控制信息资源上发送的，该第一控制信息资源对应的TCI为第一TCI，第二PDCCH是在第二控制信息资源上发送的，该第二控制信息资源对应的TCI为不同与第一TCI的第二TCI。
示例性地，终端设备会接收到来自第一网络设备的第一PDCCH和来自第二网络设备的第二PDCCH。该第一PDCCH是在第一控制信息资源上发送的，该第二PDCCH是在第二控制信息资源上发送的，该第一控制信息资源对应第一TCI，该第二控制信息资源对应第二TCI。因此，该终端设备在接收上述两个PDCCH之后，除了会获得这两个PDCCH中承载的第一DCI之外，还可以获取第一控制信息资源对应的第一TCI以及第二控制信息资源对应的第二TCI。由于该第一DCI中不携带用于指示第一下行信道的TCI的指示域，在这种情况下，该终端设备可以采用上述两个TCI中的一个TCI，用于第一下行信道的传输。
应理解，上述第一下行信道可以为PDSCH，也可以为PDCCH，还可以为其他任意的下行信道。上述控制信息资源用于表示传输PDCCH所采用的时频域资源，例如，控制资源集(control-resource set，CORESET)，或者，其他用于承载PDCCH的时频域资源。上述控制信息资源可以和第一下行信道所在时域资源和/或频域资源存在重叠，也可以不重叠。可选地，控制信息资源也可以和上行信道所在的时频资源和/或频域资源存在重叠，本申请对于控制信息资源在时域资源和频域资源不做限定。为便于理解，本申请均以控制信息资源为例进行详细说明，但这仅仅是传输PDCCH所采用的时频资源的一种叫法，本申请实施例对其名称不作限定。
作为一个可选的实施例，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
换句话说，上述至少两个控制信息资源中的第一个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息；或者，所述第一DCI的格式为第一格式，例如，第一格式为DCI format 1_0；或者，上述至少两个控制信息资源中的任一个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息；或者，上述至少两个控制信息资源中的最后一个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息；或者，上述至少两个控制信息资源中的多个控制信息资源没有被配置用于指示第一下行信道对应的TCI的指示信息。
应理解，针对多TRP传输的场景，可能存在一次发送PDCCH对应的控制信息资源没有被配置TCI指示域，由于需要发送相同的DCI，因此，无论所有的PDCCH对应的控制信息资源有没有被配置TCI指示域，所发送的DCI都不会包括TCI指示域。
还应理解，上述第一个控制信息资源可以理解为时域上起始符号最早，和/或终止符号最早，和/或时隙索引的控制信息资源。若至少两个控制信息资源的起始符号和/或终止符号，和/或时隙索引均相同，那么第一个控制信息资源可以理解为频域资源(例如REG或CCE索引)最小的控制信息资源。
为了使网络设备侧和终端设备侧理解一致，不易出错，本申请实施例可以通过多种方 式，例如，隐式方式，或者显式方式，保证终端设备确定的目标TCI与第一网络设备确定的目标TCI相同。下面分别对可能的实现方式进行说明。
作为一个可选的实施例，所述第一网络设备根据所述目标TCI与第一信息之间的对应关系，确定第一PDCCH对应的第一信息；所述第一网络设备根据所述第一信息和所述目标TCI，在第一控制信息资源上发送第一PDCCH。则对应地，所述终端设备从所述至少两个TCI中确定目标TCI，包括：所述终端设备根据第一信息，从所述至少两个TCI中确定目标TCI。可选地，第一信息为下列信息中的至少一个：
所述至少两个PDCCH所在的搜索空间的标识；或者，
所述至少两个PDCCH所在的搜索空间的类型；或者，
所述至少两个PDCCH对应的检测周期；或者，
所述至少两个PDCCH对应的控制信息资源的数量；或者，
所述至少两个PDCCH对应的控制信息资源的时域位置；或者，
所述至少两个PDCCH对应的候选PDCCH索引；或者，
所述至少两个PDCCH对应的控制资源元素CCE索引；或者，
所述至少两个PDCCH对应的资源元素组REG索引；或者，
所述至少两个PDCCH对应的无线网络临时标识RNTI；或者，
所述至少两个PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，
所述至少两个PDCCH的控制信息资源的索引；或者，
所述至少两个TCI的索引。
具体地，第一网络设备和终端设备可以通过隐式的方式，按照一定的规则确定目标TCI。这样，第一网络设备和终端设备可以准确确定目标TCI，提高第一下行信道传输的可靠性，还可以不增加网络设备发送给终端设备的DCI的比特数，提高DCI的解调性能。
下面从终端设备的角度，针对上述第一信息分情况进行详细讨论。
情况1，第一信息包括至少两个PDCCH所在的搜索空间的标识。
终端设备根据PDCCH所在的至少两个控制信息资源上的至少两个搜索空间的标识，确定第一下行信道对应的TCI。该至少两个搜索空间的标识包括第一搜索空间的标识和第二搜索空间的标识。具体地，上述搜索空间的标识可以为搜索空间的索引。
示例性地，终端设备按照搜索空间的最大索引来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定搜索空间的索引，即第一网络设备在发送第一PDCCH时，将其尽可能放在索引最大的搜索空间上发送，即第一搜索空间的索引为上述至少两个搜索空间的索引中最大的。那么，终端设备确定出在至少两个PDCCH对应的至少两个搜索空间中，第一搜索空间的索引是最大的，即第一搜索空间的索引大于第二搜索空间的索引。然后，该终端设备再根据该第一搜索空间所在的控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一搜索空间所在的控制信息资源对应的TCI。应理解，控制信息资源与TCI的对应关系可以是预先定义的，也可以是网络设备通过高层信令配置给终端设备的，本实施例对此不作限定。
示例性地，终端设备按照搜索空间的最小索引来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定搜索空间的索引，即第一网络设备在发送第一PDCCH时，将其 尽可能放在索引最小的搜索空间上发送，即第一搜索空间的索引为上述至少两个搜索空间的索引中最小的。那么，终端设备确定出在至少两个PDCCH对应的至少两个搜索空间中，第一搜索空间的索引是最小的，即第一搜索空间的索引小于第二搜索空间的索引。然后，该终端设备再根据该第一搜索空间所在的控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一搜索空间所在的控制信息资源对应的TCI。
示例性地，终端设备按照预先定义或高层信令配置搜索空间的索引的方式来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定预先定义或高层信令配置搜索空间的索引，即预先定义或配置目标TCI对应的控制信息资源所在的第一搜索空间的索引号，例如，第一搜索空间的索引为5，那么，第一网络设备在发送第一PDCCH时，会将其放在索引5的搜索空间上发送。终端设备从至少两个PDCCH对应的至少两个搜索空间中，确定出索引为5的第一搜索空间，然后，根据该第一搜索空间所在的控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一搜索空间所在的控制信息资源对应的TCI。应理解，上述通过最大索引或最小索引来确定目标TCI的方式也可以通过预先定义或高层信令配置。
情况2，第一信息包括至少两个PDCCH所在的搜索空间的类型。
终端设备根据PDCCH所在的至少两个控制信息资源上的至少两个搜索空间的类型，确定第一下行信道对应的TCI。该至少两个搜索空间的类型包括第一搜索空间的类型和第二搜索空间的类型。具体地，搜索空间的类型包括用户专用搜索空间和公共搜索空间。
示例性地，终端设备按照用户专用搜索空间来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定搜索空间的类型，即第一网络设备在发送第一PDCCH时，将其放在用户专用搜索空间上发送。这样，终端设备根据PDCCH所在的第一搜索空间对应的控制信息资源，确定第一下行信道对应的TCI，所述第一搜索空间为用户专用搜索空间。
示例性地，终端设备按照公共搜索空间来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定搜索空间的类型，即第一网络设备在发送第一PDCCH时，将其放在公共搜索空间上发送。这样，终端设备根据PDCCH所在的第一搜索空间对应的控制信息资源，确定第一下行信道对应的TCI，所述第一搜索空间为公共搜索空间。
应理解，上述通过用户专用搜索空间或公共搜索空间确定目标TCI的方式可以通过预先定义或高层信令配置。
情况3，第一信息包括至少两个PDCCH对应的检测周期。
终端设备根据至少两个PDCCH对应的检测周期，确定第一下行信道对应的TCI。该至少两个PDCCH对应的检测周期包括第一PDCCH检测周期和第二PDCCH检测周期。
示例性地，终端设备按照PDCCH检测周期中最大的检测周期来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定PDCCH检测周期，即第一网络设备在发送第一PDCCH时，在配置PDCCH检测周期最大的PDCCH检测时机上发送第一PDCCH。这样，终端设备确定出至少两个PDCCH中检测周期最大的第一PDCCH，即第一PDCCH检测周期大于第二PDCCH检测周期。然后，该终端设备根据第一PDCCH检测周期对应的控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一PDCCH检测周期对应的控制信息资源对应的TCI。
示例性地，终端设备按照PDCCH检测周期中周期最小检测周期来确定目标TCI。与 之对应的，第一网络设备根据目标TCI确定PDCCH检测周期，即第一网络设备在发送第一PDCCH时，在配置PDCCH检测周期最小的PDCCH检测时机上发送第一PDCCH。这样，终端设备确定出至少两个PDCCH中检测周期最小的第一PDCCH，即第一PDCCH检测周期小于第二PDCCH检测周期。然后，该终端设备可以根据第一PDCCH检测周期对应的控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一PDCCH检测周期对应的控制信息资源对应的TCI。
示例性地，终端设备按照预先定义或高层信令配置PDCCH检测周期来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定预先定义或高层信令配置PDCCH检测周期，即预先定义或配置目标TCI对应的控制信息资源对应的PDCCH的检测周期，例如，第一PDCCH对应的PDCCH检测周期为每10符号出现一次PDCCH检测时机，那么，第一网络设备在在配置PDCCH检测周期为每10符号出现一次的PDCCH检测时机上发送第一PDCCH时。终端设备可以从至少两个PDCCH对应的检测周期中，确定出检测周期为每10符号出现一次PDCCH检测时机上的第一PDCCH，然后，根据第一PDCCH检测周期对应的控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一PDCCH检测周期对应的控制信息资源对应的TCI。应理解，上述通过最大PDCCH检测周期或最小PDCCH检测周期来确定目标TCI的方式也可以通过预先定义或高层信令配置。
情况4，第一信息包括至少两个PDCCH对应的控制信息资源的数量。
终端设备根据PDCCH对应的至少两个控制信息资源的数量，确定第一下行信道对应的TCI。该至少两个控制信息资源包括第一控制信息资源和第二控制信息资源。
示例性地，终端设备按照检测到PDCCH对应的控制信息资源的数量来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定PDCCH对应的控制信息资源的数量，即第一网络设备可以在N1个对应第一TCI的第一控制信息资源上发送多个第一PDCCH，第二网络设备可以在N2个对应第二TCI的第二控制信息资源上发送一个或多个第二PDCCH。例如，N1大于N2，N1和N2均为大于或等于1的整数。这样，终端设备可以根据至少两个PDCCH对应的控制信息资源的数量，将数量较大的第一控制信息资源对应的第一TCI确定为目标TCI，进而确定第一下行信道对应的TCI。又例如，N1小于N2，N1和N2均为大于或等于1的整数。这样，终端设备可以根据至少两个PDCCH对应的控制信息资源的数量，将数量较小的第一控制信息资源对应的第一TCI确定为目标TCI，进而确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一TCI。
情况5，第一信息包括至少两个PDCCH对应的控制信息资源的时域位置。
终端设备根据PDCCH所在的至少两个控制信息资源的时域位置(即控制信息资源所在的时域资源的位置)，确定第一下行信道对应的TCI。该至少两个时域资源位置包括第一时域资源的位置和第二时域资源的位置。
示例性地，终端设备按照至少两个控制信息资源中的时域资源的相对位置关系来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定至少两个控制信息资源中的时域资源，具体地，第一网络设备和第二网络设备根据至少两个控制信息资源中时域资源的相对位置关系发送PDCCH。这样，终端设备根据至少两个控制信息资源中时域资源的相对位置关系，确定目标TCI。即第一网络设备将满足预设的相对位置关系的时域资源对应的 控制信息资源作为第一控制信息资源，在该第一控制信息资源上发送第一PDCCH。对应地，终端设备可以根据第一时域资源对应的控制信息资源，确定第一下行信道对应的TCI。上述预设的相对位置关系包括下列关系中的至少一种：
第一时域资源的起始符号在第二时域资源的起始符号之前；或者，
第一时域资源的起始符号在第二时域资源的起始符号之后；或者，
第一时域资源的终止符号在第二时域资源的终止符号之前；或者，
第一时域资源的终止符号在第二时域资源的终止符号之后；或者，
第一时域资源的占用符号数比第二时域资源的占用符号数多；或者，
第一时域资源的占用符号数比第二时域资源的占用符号数少。
示例性地，终端设备按照预先定义或高层信令配置时域资源位置的方式来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定预先定义或高层信令配置时域资源。即可以预先定义或配置第一时域资源的位置，例如，符号索引为4～7，那么，第一网络设备在发送第一PDCCH时，会将预先定义或配置的第一时域资源的位置对应的控制信息资源确定为第一控制信息资源，并在该第一控制信息资源上发送第一PDCCH。对应地，终端设备可以根据第一时域资源对应的第一控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一时域资源对应的第一控制信息资源对应的TCI。应理解，上述预先定义或高层信令配置的第一时域资源包括第一时域资源的起始符号、终止符号、或者持续时间中的一种或多种，本申请实施例对此不作限定。
情况6，第一信息包括至少两个PDCCH对应的候选PDCCH索引、CCE索引、或者REG索引中的至少一种。
终端设备根据至少两个PDCCH所在的至少两个控制信息资源对应的至少两个第一信息，确定第一下行信道对应的TCI。该至少两个第一信息包括第一信息#A(对应第一控制信息资源)和第一信息#B(对应第二控制信息资源)。具体地，这里第一信息可以包括：PDCCH对应的候选PDCCH索引、PDCCH所在的起始CCE索引、PDCCH所在的终止CCE索引、PDCCH所在的起始REG索引、PDCCH所在的终止REG索引或CCE到REG的映射方式至少一种。其中，CCE到REG的映射方式包括：交织、非交织映射或REG绑定大小等。
示例性地，终端设备按照至少两个第一信息的索引之间的关系来确定目标TCI。与之对应的，第一网络设备根据目标TCI确定至少两个第一信息的索引中一个第一信息的索引。例如，第一信息#A与第一信息#B的关系为：第一信息#A的索引大于第一信息#B的索引；或者，第一信息#A的索引小于第一信息#B的索引。第一网络设备将第一信息#A的索引对应的控制信息资源确定为第一控制信息资源，并在该第一控制信息资源上发送PDCCH。这样，终端设备根据第一信息#A对应的第一控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一信息#A对应的第一控制信息资源对应的TCI。
示例性地，终端设备按照预先定义或高层信令配置第一信息的索引确定目标TCI。与之对应的，第一网络设备根据目标TCI确定一个预先定义或高层信令配置第一信息的索引。即预先定义或配置第一信息#A的索引，那么，第一网络设备在发送第一PDCCH时，会将预先定义或配置的第一信息#A的索引对应的控制信息资源确定为第一控制信息资 源，并在该第一控制信息资源上发送第一PDCCH。对应地，终端设备根据第一信息#A对应的第一控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一信息#A对应的第一控制信息资源对应的TCI。应理解，上述通过至少两个第一信息的索引之间的关系来确定目标TCI的方式也可以通过预先定义或高层信令配置。
情况7，第一信息包括至少两个PDCCH对应的RNTI、或DCI格式中的至少一种。
可选地，终端设备根据至少两个PDCCH对应的至少两个RNTI，确定第一下行信道对应的TCI。与之对应的，第一网络设备根据目标TCI确定PDCCH对应的RNTI。该至少两个RNTI包括第一RNTI和第二RNTI。示例性地，可以按照预先定义或高层信令配置第一RNTI的方式来确定目标TCI。即可以预先定义或配置第一RNTI，那么，第一网络设备在发送第一PDCCH时，会采用预先定义或配置的第一RNTI对第一PDCCH上承载的第一DCI进行加扰，然后发送第一PDCCH。对应地，终端设备可以根据第一RNTI对应的第一PDCCH，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一RNTI对应的第一PDCCH对应的TCI。上述第一RNTI可以是MCS-C-RNTI或TRP-RNTI，还可以是其他RNTI，本申请实施例对此不作限定。
可选地，终端设备根据至少两个PDCCH对应的至少两个DCI格式，确定第一下行信道对应的TCI。与之对应的，第一网络设备根据目标TCI确定PDCCH对应的DCI格式。PDCCH对应的DCI格式可以理解为PDCCH承载的DCI对应的DCI格式。该至少两个DCI格式包括第一DCI格式和第二DCI格式。示例性地，可以按照预先定义或高层信令配置第一DCI格式的方式来确定目标TCI。即可以预先定义或配置第一DCI格式，那么，第一网络设备在发送第一PDCCH时，会采用预先定义或配置的第一DCI格式的第一DCI承载在第一PDCCH中。对应地，终端设备可以根据第一DCI格式对应的第一PDCCH，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一DCI格式对应的第一PDCCH对应的TCI。上述第一格式可以为预先定义或高层信令配置的DCI格式。
情况8，第一信息包括至少两个PDCCH的传输时间与第一下行信道的传输时间之间的时间差。
终端设备根据至少两个PDCCH的传输时间与第一下行信道的传输时间之间的至少两个时间差，确定第一下行信道对应的TCI。与之对应的，第一网络设备根据目标TCI确定至少一个PDCCH的传输时间与第一下行信道的传输时间之间的时间差。应理解，在本申请实施例中，为保证下行信道的正确传输，PDCCH的传输时间与第一下行信道的传输时间之间的时间差需要大于或等于一个调度阈值，本申请称为第一阈值。因此，终端设备可以将上述至少两个时间差中大于或等于第一阈值的时间差对应的PDCCH所采用的TCI，确定为目标TCI。
其中，PDCCH的传输时间与第一下行信道的传输时间之间的时间差可以是以下一种：
PDCCH所在控制信息资源的起始符号至第一下行信道的起始符号的时间差；或者
PDCCH所在控制信息资源的终止符号至第一下行信道的起始符号的时间差；或者
PDCCH所在控制信息资源的终止符号至第一下行信道的终止符号的时间差；或者
PDCCH所在控制信息资源的起始符号至第一下行信道的终止符号的时间差；或者
PDCCH所占用时域资源的符号索引最大的符号至第一下行信道的起始符号的时间差；或者
PDCCH所占用时域资源的符号索引最小的符号至第一下行信道的起始符号的时间差。
情况9，第一信息包括至少两个PDCCH对应的PDCCH的数量。
终端设备根据至少两个PDCCH对应的PDCCH的数量，确定第一下行信道对应的TCI。与之对应的，第一网络设备根据目标TCI确定至少一个PDCCH对应的PDCCH的数量。
示例性地，终端设备按照检测到PDCCH的数量来确定目标TCI。即第一网络设备在检测到PDCCH数量最多或最少的控制信息资源上发送第一PDCCH，这样，终端设备可以先确定出至少两个PDCCH对应的至少两个控制信息资源中数量最多或最少的第一控制信息资源，再根据第一控制信息资源，确定第一下行信道对应的TCI。进一步地，该第一下行信道对应的TCI为第一对应的TCI。应理解，上述通过检测PDCCH的数量最多或最少来确定目标TCI的方式也可以通过预先定义或高层信令配置。终端设备还可以按照预先定义或高层信令配置其他数量(或其他数量范围)的控制信息资源的方式来确定目标TCI，本申请实施例对此不作限定。
可选地，在另一情况中，上述第一信息可以包括：所述至少两个PDCCH的控制信息资源的索引。在这种情况下，可以预先定义索引小的控制信息资源对应的TCI为目标TCI，或者，预先定义索引大的控制信息资源对应的TCI为目标TCI。
可选地，在另一情况中，上述第一信息可以包括：所述至少两个TCI的索引。在这种情况下，可以预先定义索引小的TCI为目标TCI，或者，预先定义索引大的TCI为目标TCI。
应理解，在本申请的一种可能的实现方式中，终端设备还可以结合上述多种情况进行综合判断，保证最终选择出一个TCI作为目标TCI。下面对多种情况结合的方法进行详细说明，该方法可以包括下列步骤：
步骤一，终端设备根据情况A，确定候选TCI；
步骤二，若上述候选TCI包括一个TCI，那么该终端设备将该候选TCI确定为目标TCI。若上述候选TCI包括多个TCI，那么该终端设备不再考虑步骤一对应的情况，可以再根据步骤一对应的情况以外的另一个情况B，从上述候选TCI中确定新的候选TCI，若新的候选TCI包括多个TCI，则重新执行步骤一，直到确定出唯一的目标TCI为止。可以理解的是，每个情况只使用一次来筛选候选TCI，在使用过一次之后，则会使用其他未进行判断的情况中的一种或多种进行确定候选TCI。
应理解，情况A与情况B不同，且情况A和情况B均可以属于上述9种情况，但本申请实施例对此不作限定。
示例性地，终端设备可以先根据情况8(即至少两个PDCCH的传输时间与第一下行信道的传输时间之间的时间差)确定目标TCI。若无法确定出唯一的目标TCI，该终端设备可以再根据情况5(即至少两个PDCCH对应的控制信息资源的时域位置)，从剩余的TCI中确定目标TCI。若无法确定出唯一的目标TCI，该终端设备可以再根据情况6(即至少两个PDCCH对应的候选PDCCH索引、CCE索引、或者REG索引中的至少一种)，或者情况3(至少两个PDCCH对应的检测周期)，或者情况1(即至少两个PDCCH所在的搜索空间的标识)，从剩余的TCI中确定目标TCI。
示例性地，该终端设备还可以先根据PDCCH对应的检测周期确定目标TCI，若无法确定出唯一的一个TCI，再根据PDCCH的传输时间与第一下行信道的传输时间之间的时间差，从剩余的TCI中确定目标TCI。即在上述第一信息包括至少两个信息的情况下，本申请对上述第一信息的判断先后顺序不作限定。
在一种可能的实现方式中，上述用于确定目标TCI的信息(例如，第一信息中所包括的信息分别对应情况1至情况9)可以具有优先级，即终端设备可以先采用上述第一信息中优先级较高的信息进行判断，若优先级较高的信息无法确定出唯一的目标TCI，该终端设备再采用优先级较低的信息进行判断。应理解，该优先级可以通过预先定义或者网络设备通过高层信令配置的方式配置给终端设备。
作为一个可选的实施例，所述方法还包括：所述第一网络设备发送高层信令，所述高层信令用于指示所述目标TCI；所述终端设备接收所述高层信令。
具体地，通过显示的方式向终端设备指示第一下行信道对应的目标TCI。第一网络设备向终端设备发送高层信令用于指示目标TCI，但应理解，该目标TCI仍为上述至少两个TCI中的一个。由于目标TCI(即第一TCI)对应第一控制信息资源，这相当于为终端设备半静态配置了第一下行信道对应的第一控制信息资源，即半静态配置了第一网络设备向终端设备发送第一下行信道。在本实施例中，高层信令是第一网络设备发送给终端设备的，但应理解，在具体实现中，该高层信令还可以是其他网络设备或者节点发送给该终端设备的，本申请实施例对此不作限定。
应理解，高层信令可以指高层协议层发出的信令，高层协议层为物理层以上的每个协议层中的至少一个协议层。其中，高层协议层具体可以为以下协议层中的至少一个：媒体接入控制(medium access control，MAC)层、无线链路控制(radio link control，RLC)层、分组数据会聚协议(packet data convergence protocol，PDCP)层、无线资源控制(radio resource control，RRC)层和非接入层(non access stratum，NAS)等等。而物理层信令或动态信令一般是在DCI中承载的控制信息。
上述高层信令可以是针对服务小区配置的，可以是针对HARQ进程号配置的，可以是针对码字配置的，还可以是针对DCI配置的，本申请实施例对此不作限定。
示例性地，高层信令可以是针对服务小区配置的，即不同服务小区可以采取不同的高层信令用于确定目标TCI。可以理解的是，第一服务小区上可以使用高层信令配置的方式确定目标TCI，第二服务小区上可以不使用高层信令配置的方式确定目标TCI，或者第二服务小区上没有配置用于确定TCI的高层信令，或者第二服务小区可以按照预先定义的方式确定目标TCI。这种实现方式的好处是，网络设备也可以灵活决定在哪个服务小区上进行多TRP的PDCCH重复传输，在哪个服务小区上不进行多TRP的PDCCH重复传输。网络设备可以在进行多TRP的PDCCH重复传输的服务小区通过高层信令配置目标TCI。同理，这里的高层信令也可以是针对部分带宽，实现方式与服务小区类似，此处不再赘述。
示例性地，高层信令可以是针对HARQ进程号配置的，即不同HARQ进程号可以采取不同的高层信令用于确定目标TCI。HARQ进程号一般是DCI中通知的或者根据预先定义的规则确定的。例如，第一HARQ进程号上的传输块可以使用高层信令配置的方式确定目标TCI，第二HARQ进程号上的传输块可以不使用高层信令配置的方式确定目标TCI，或者第二HARQ进程号上的传输块没有配置用于确定目标TCI的高层信令，或者第二 HARQ进程号上的传输块可以按照预先定义的方式确定目标TCI。这种实现方式的好处是，网络设备可以灵活决定在哪个HARQ进程号上进行多TRP的PDCCH重复传输，在哪个HARQ进程号上不进行多TRP的PDCCH重复传输。这样能够实现在同一个服务小区或者部分带宽下的终端设备动态切换不同的传输方式。
示例性地，高层信令可以是针对码字配置的，即不同码字可以采取不同的高层信令用于确定目标TCI，或者不同的码字数量可以采用不同的高层信令用于确定目标TCI。可选地，码字一般是0或1，码字的数量一般为1或2。例如，第一码字可以使用高层信令配置的方式确定目标TCI，第二码字可以不使用高层信令配置的方式确定目标TCI，或者第二码字没有配置用于确定目标TCI的高层信令，或者第二码字可以按照预先定义的方式确定目标TCI。这种实现方式的好处是，网络设备可以灵活决定在哪个码字或者哪个码字数量上进行多TRP间的PDCCH重复传输，在哪个码字或者哪个码字数量上不进行多TRP间的PDCCH重复传输。这样能够实现在同一个服务小区或者部分带宽下的终端设备动态切换不同的传输方式。应理解，上述码字或者码字数量可以是高层信令配置的，也可以是DCI中动态通知的。
示例性地，高层信令还可以是针对DCI配置的，即不同的DCI可以采用不同的高层信令用于确定目标TCI。这里不同的DCI可以是不同的DCI格式，例如，DCI格式1_0，或者DCI格式1_1，也可以是不同的RNTI加扰的DCI，也可以是不同搜索空间的DCI，此处不作限定。例如，第一DCI调度的第一下行信道可以使用高层信令配置的方式确定目标TCI，第二DCI调度的第二下行信道可以不使用高层信令配置的方式确定目标TCI，或者第二DCI调度的第二下行信道没有配置用于确定目标TCI的高层信令，或者第二DCI调度的第二下行信道可以按照预先定义的方式确定目标TCI。这种实现方式的好处是，网络设备可以灵活使用DCI决定终端设备在什么时间进行多TRP间的PDCCH重复传输或不进行多TRP间的PDCCH重复传输。这样能够实现在同一个服务小区或者部分带宽下的终端设备动态切换不同的业务下的传输方式。
作为一个可选的实施例，所述DCI包括第一指示信息，所述第一指示信息用于指示所述至少两个TCI中的一个；所述终端设备从所述至少两个TCI中确定目标TCI，包括：所述终端设备根据所述第一指示信息，确定所述目标TCI。
具体而言，上述第一指示信息可以为DCI中的第一比特域。终端设备可以根据DCI中的第一比特域的比特状态，确定第一下行信道对应的TCI。该第一比特域的比特状态可以包括第一比特状态和第二比特状态。第一比特状态用于指示至少两个控制信息资源中的第一控制信息资源对应的第一TCI。第二比特状态用于指示至少两个控制信息资源中的第二控制信息资源对应的第二TCI。应理解，上述第一指示信息可以直接指示至少两个TCI中的一个TCI，也可以指示至少两个控制信息资源中的一个控制信息资源，再由终端设备根据所指示的控制信息资源，确定该控制信息资源对应的TCI，本申请实施例对此不作限定。
示例性地，网络设备可以在DCI中引入1bit的指示域，或者该指示域为1bit，来指示目标TCI。例如，0用于指示目标TCI为第一控制信息资源对应的第一TCI，1用于指示目标TCI为第二控制信息资源对应的第二TCI；或者，1用于指示目标TCI为第一控制信息资源对应的第一TCI，0用于指示目标TCI为第二控制信息资源对应的第二TCI。例 如，0用于指示目标TCI为第一控制信息资源，1用于指示目标TCI为第二控制信息资源；或者，1用于指示目标TCI为第一控制信息资源，0用于指示目标TCI为第二控制信息资源。终端设备在接收到该DCI之后，便直接根据该DCI中的1bit指示域，确定第一下行信道对应的目标TCI。
作为一个可选的实施例，所述目标TCI对应的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
应理解，在本申请实施例中，为保证下行信道的正确传输，PDCCH的传输时间与第一下行信道的传输时间之间的时间差需要大于或等于一个调度阈值，本申请称为第一阈值。因此，终端设备所选择出的目标TCI对应的PDCCH的传输时间与第一下行信道的传输时间之间的时间差需要大于或等于第一阈值。该第一阈值可以是预先定义的，也可以是网络设备通过信令为终端设备配置的，还可以是终端设备上报的，本申请实施例对此不作限定。
在一种可能的实现方式中，终端设备先确定出目标TCI，然后判断该目标TCI对应的PDCCH的传输时间与第一下行信道的传输时间之间的时间差是否大于或等于第一阈值。若该时间差大于或等于第一阈值，该终端设备可以直接将该目标TCI作为第一下行信道对应的TCI。若该时间差小于第一阈值，该终端设备可以重新确定时间差满足条件的目标TCI。例如，在时间差满足大于或等于第一阈值的条件的情况下，该终端设备可以将至少两个PDCCH中最后一次传输的PDCCH对应的TCI，或者至少两个PDCCH中第一次传输的PDCCH对应的TCI确定为第一下行信道对应的TCI。
在另一种可能的实现方式中，终端设备要从PDCCH的传输时间与第一下行信道的传输时间之间的时间差大于或等于第二阈值的多个PDCCH对应的TCI中，确定目标TCI。
具体的，所述至少两个PDCCH中最后一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第二阈值；或者，
所述至少两个PDCCH中第一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于所述第二阈值。
示例性地，至少两个PDCCH中最后一次传输的PDCCH的传输时间与第一下行信道的传输时间之间的时间差大于或等于第二阈值。应理解，若最后一次传输的PDCCH对应的时间差不满足上述条件(即该时间差小于第二阈值)，则该终端设备可以选择最近一次满足条件的PDCCH对应的TCI作为目标TCI。
示例性地，至少两个PDCCH中第一次传输的PDCCH的传输时间与第一下行信道的传输时间之间的时间差大于或等于第二阈值。应理解，若第一次传输的PDCCH对应的时间差满足上述条件(即该时间差大于或等于第二阈值)，则该终端设备可以选择根据情况1至情况9中的至少一种满足条件的PDCCH对应的TCI作为目标TCI。应理解，若第一次传输的PDCCH对应的时间差不满足上述条件(即该时间差小于第二阈值)，那该终端设备可以不使用本实施例的方法确定目标TCI，即不使用本实施例的方法确定第一下行信道对应的TCI。可选地，在这种情况下，该终端设备此时可以假设一个预先定义的TCI或者假设没有TCI指示。
上述第二阈值可以等于第一阈值，该第二阈值可以是预先定义的，也可以是网络设备通过信令为终端设备配置的，还可以是终端设备上报的，本申请实施例对此不作限定。
上述第一次传输可以理解为采用时域上最早的一次传输，例如起始符号最早、和/或终止符号最早、和/或时隙索引最小的传输。此最早的一次传输对应的控制信息资源传输PDCCH为第一次传输的PDCCH。若至少两个控制信息资源的起始符号、和/或终止符号、和/或时隙索引均相同，那么第一次传输可以理解为采用频域资源最小的一次传输，例如例如REG或CCE索引。此最小的一次传输对应的控制信息资源传输PDCCH为第一次传输的PDCCH。同理，上述最后一次传输可以理解为采用时域上最晚的一次传输，例如起始符号最晚、和/或终止符号最晚、和/或时隙索引最大的传输。此最晚的一次传输对应的控制信息资源传输PDCCH为最后一次传输的PDCCH。若至少两个控制信息资源的起始符号、和/或终止符号、和/或索引均相同，那么最后一次传输可以理解为采用频域资源最大的一次传输，例如REG或CCE索引。此最大的一次传输对应的控制信息资源传输PDCCH为最后一次传输的PDCCH。
在一种可能的实现方式中，终端设备确定至少两个PDCCH对应的至少两个控制信息资源的时域资源。该终端设备根据该至少两个时域资源，确定至少两个PDCCH的传输时间和第一下行信道的传输时间之间的时间差是否大于或等于第一阈值。进一步地，若第一时域资源为上述至少两个时域资源中的一个时域资源，且第一时域资源与第一下行信道之间的时间差大于或等于第一阈值，则终端设备确定确定至少两个PDCCH的传输时间和第一下行信道的传输时间之间的时间差大于或等于第一阈值。反之，若第一时域资源与第一下行信道之间的时间差小于第一阈值，则终端设备确定确定至少两个PDCCH的传输时间和第一下行信道的传输时间之间的时间差小于第一阈值。
其中，第一时域资源为至少两个时域资源中的最后一个时域资源，或者，第一时域资源为至少两个时域资源中的第一个时域资源，或者，第一时域资源为目标TCI对应的控制信息资源对应的时域资源，或者，第一时域资源为预先定义或高层信令配置的时域资源。
可选地，第一时域资源与第一下行信道之间的时间差，可以理解为：
第一时域资源的起始符号与第一下行信道的起始符号之间的时间差；或者，
第一时域资源的终止符号与第一下行信道的终止符号之间的时间差；或者，
第一时域资源的终止符号与第一下行信道的起始符号之间的时间差。
作为一个可选的实施例，所述方法还包括：所述终端设备发送能力信息，所述能力信息用于表示所述终端设备能够接收至少两个PDCCH；和/或，
所述终端设备接收第一配置信息，所述第一配置信息用于配置所述终端设备接收至少两个PDCCH。
具体地，终端设备可以向网络设备(例如第一网络设备和/或第二网络设备)上报自身的能力信息，表示该终端设备支持接收至少两个的PDCCH的能力。网络设备可以向终端设备发送第一配置信息，用于配置终端设备接收至少两个的PDCCH。应理解，网络设备可以基于终端设备上报的能力信息向终端设备发送第一配置信息，也可以不基于终端设备上报的能力信息(或者在终端设备没有上报能力信息的情况下)向终端设备发送第一配置信息。应理解，至少两个PDCCH的重复次数可以是高层信令配置的，也可以是预先定义的。在本实施例中，终端设备向网络设备上报能力信息，可以使网络设备根据需求灵活配置是否进行PDCCH重复传输，从而灵活适应多个不同场景。
若终端设备上报的能力信息表示该终端设备不支持接收至少两个的PDCCH的能力， 此时，可以理解为该终端设备无法采用本申请实施例的方法来确定第一下行信道对应的TCI。若所述终端设备上报的能力信息表示该终端设备支持接收至少两个的PDCCH的能力，但网络设备可以向终端设备发送第三配置信息，该第三配置信息用于配置终端设备不可以接收至少两个的PDCCH。此时，可以理解为该终端设备无法采用本申请实施例的方法来确定第一下行信道对应的TCI。
示例性地，由于上述至少两个PDCCH承载相同的DCI，所以上述至少两个PDCCH可以对应相同的DCI格式，和/或，上述至少两个PDCCH对应的第二信息之间存在对应关系，该对应关系可以是预先定义的，或者高层信令配置的。其中，该第二信息包括以下至少一种：候选PDCCH索引、或者起始CCE的索引、或者起始REG的索引。可以理解的是，上述至少两个PDCCH对应的第二信息存在预先定义或高层信令配置的关联关系。这样，终端设备可以进行联合检测PDCCH，减少终端设备盲检测的次数。
作为一个可选的实施例，所述终端设备从所述至少两个TCI中确定目标TCI，包括：在满足下列条件中的至少一个的情况下，所述终端设备从所述至少两个TCI中确定目标TCI：
加扰所述至少两个PDCCH的RNTI为第一RNTI；或者，
所述至少两个PDCCH对应的搜索空间为第一搜索空间；或者，
所述DCI的格式为第一格式；或者，
所述至少两个控制信息资源属于第一控制信息资源组；或者，
所述DCI的优先级比特域的比特状态为第一比特状态。
具体地，在满足上述条件中的至少一个的情况下，终端设备才可以采用本申请实施例的方法来确定第一下行信道对应的TCI。上述第一RNTI、第一搜索空间、第一格式、或者第一控制信息资源组、或者第一比特状态，可以是预先定义的，也可以是网络设备通过高层信令配置给该终端设备的。
可选地，上述第一比特状态用于指示大于0的整数值，例如1,2,3,4,5,6,7,8。可以理解的是，当DCI的优先级比特域的比特状态指示的整数值为大于0的一个数值时(即DCI的优先级比特域的比特状态为第一比特状态时)，该DCI指示传输的信息为高优先级的重要数据信息，此时，终端设备需要从至少两个TCI中确定目标TCI。
作为一个可选的实施例，所述方法还包括：所述终端设备接收第二配置信息，所述第二配置信息用于配置所述第一RNTI、所述第一搜索空间、所述第一格式、或者所述第一控制信息资源组、或者第一比特状态中的至少一个。
示例性地，当加扰至少两个PDCCH的RNTI均为第一RNTI时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。例如，第一RNTI为MCS-C-RNTI。
示例性地，当至少两个PDCCH对应的搜索空间组为第一搜索空间组时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。或者，当至少两个PDCCH对应的搜索空间为第一搜索空间时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。例如，第一搜索空间为公共搜索空间或用户专用搜索空间。
示例性地，当DCI的格式为第一DCI格式时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。例如，第一DCI格式为DCI格式1_0、或者DCI格式1_1、或者DCI格式1_2。
示例性地，当至少两个控制信息资源属于第一控制信息资源组时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。
示例性地，当DCI的优先级比特域的比特状态为第一比特状态时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。
示例性地，当加扰至少两个PDCCH的RNTI均为第一RNTI、且至少两个PDCCH对应的搜索空间组为第一搜索空间组时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。示例性地，当加扰至少两个PDCCH的RNTI均为第一RNTI、且DCI的格式为第一格式时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。示例性地，当至少两个控制信息资源属于第一控制信息资源组、且DCI的格式为第一格式、且至少两个PDCCH对应的搜索空间组为第一搜索空间组时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。应理解，终端设备根据上述哪些情况进行确定，可以是预先定义的，也可以是网络设备通过高层信令为终端设备配置的。
可选地，上述终端设备还可以根据DCI所指示的第一下行信道的时频资源，来确定是否采用本申请实施例的方法确定第一下行信道对应的TCI。
具体地，可以在上述第一下行信道的时频资源满足下列条件中的至少一个的情况下，采用本申请实施例的方法从至少两个TCI中确定目标TCI：
第一下行信道的资源索引属于第一索引集合；或者，
第一下行信道的时域资源长度属于第一时域长度；或者，
第一下行信道的传输时间的传输时间偏移量属于第一偏移量集合。
示例性地，第一索引集合为{0,1,2…15}，当第一下行信道的资源索引属于{0,1,2…15}时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。这样，针对不同的业务类型，可以灵活配置不同的资源集合，使得终端设备只有在特定业务类型下才能够使用本申请实施例的方法。
示例性地，第一时域长度包括{2,4,7}中的一个或多个，当第一下行信道的时域资源长度属于{2,4,7}中的一个或多个时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。
示例性地，第一偏移量集合为{0,1,2,3,4}，当第一下行信道的传输时间偏移量属于{0,1,2,3,4}时，终端设备可以根据本申请实施例的方式确定第一下行信道对应的TCI。
作为一个可选的实施例，在满足下列条件的情况下，终端设备才可以采用本申请实施例的方法来确定第一下行信道对应的TCI：终端设备确定至少两个控制信息资源对应的TCI不同，或者至少两个控制信息资源的索引号不同，或者至少两个控制信息资源的时域资源不同；或者，PDCCH被配置或指示进行重复传输。
可选地，网络设备还可以向终端设备发送第四配置信息，该第四配置信息用于配置PDCCH的重复传输次数，具体地，即PDCCH的传输次数大于或等于2。应理解，PDCCH重复传输可以是在时域上重复传输、或者频域上重复传输、或者在码域上重复传输中的至少一种。
可选地，网络设备还可以向终端设备发送第五配置信息，该第五配置信息用于配置PDCCH的重复传输是在不同TRP之间的重复传输。
应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应 以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
上述本申请提供的实施例中，分别从终端设备、网络设备、以及终端设备和网络设备之间交互的角度对本申请实施例提供的方法进行了介绍。可以理解的是，各个网元，例如终端设备、网络设备为了实现上述本申请实施例提供的方法中的各功能，终端设备和网络设备包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对终端设备、网络设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。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。需要说明的是，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。
上文中结合图1至图2，详细描述了根据本申请实施例的传输下行信道的方法，下面将结合图3至图6，详细描述根据本申请实施例的传输下行信道的装置。
在采用对应各个功能划分各个功能模块的情况下，图3示出了本申请实施例提供的传输下行信道的装置300。所述传输下行信道的装置为终端设备或支持终端设备实现实施例中提供的方法的传输下行信道的装置，例如该传输下行信道的装置可以是芯片系统。该装置300包括：接收单元310和处理单元320。
在一种可能的实现方式中，装置300用于执行上述方法200中终端设备对应的各个流程和步骤。
该接收单元310用于：在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，所述至少两个PDCCH承载的下行控制信息DCI相同，所述DCI用于指示第一下行信道对应的时频资源；该处理单元320用于：获取所述至少两个控制信息资源对应的至少两个传输配置指示TCI，以及从所述至少两个TCI中确定目标TCI，所述目标TCI为所述第一下行信道对应的TCI；该接收单元310用于：根据所述DCI和所述处理单元320确定的所述目标TCI，接收所述第一下行信道。
示例性地，该处理单元320具体用于：根据下列信息中的至少一个，从所述至少两个TCI中确定目标TCI：所述至少两个PDCCH所在的搜索空间的标识；或者，所述至少两个PDCCH所在的搜索空间的类型；或者，所述至少两个PDCCH对应的检测周期；或者，所述至少两个PDCCH对应的控制信息资源的数量；或者，所述至少两个PDCCH对应的控制信息资源的时域位置；或者，所述至少两个PDCCH对应的候选PDCCH索引；或者，所述至少两个PDCCH对应的控制资源元素CCE索引；或者，所述至少两个PDCCH对应的资源元素组REG索引；或者，所述至少两个PDCCH对应的无线网络临时标识RNTI；或者，所述至少两个PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，所述至少两个PDCCH的控制信息资源的索引；或者，所述至少两个TCI的索引。
示例性地，该接收单元310还用于：接收高层信令，所述高层信令用于指示所述目标TCI。
示例性地，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
示例性地，所述目标TCI对应的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
示例性地，所述至少两个PDCCH中最后一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第二阈值；或者，所述至少两个PDCCH中第一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于所述第二阈值。
示例性地，该装置还包括：发送单元，用于发送能力信息，所述能力信息用于表示所述装置能够接收至少两个PDCCH；和/或，所述接收单元310还用于：接收第一配置信息，所述第一配置信息用于配置所述装置接收至少两个PDCCH。
示例性地，该处理单元320具体用于：在满足下列条件中的至少一个的情况下，从所述至少两个TCI中确定目标TCI：加扰所述至少两个PDCCH的RNTI为第一RNTI；或者，所述至少两个PDCCH对应的搜索空间为第一搜索空间；或者，所述DCI的格式为第一DCI格式；或者，所述至少两个控制信息资源属于第一控制信息资源组；或者，所述DCI的优先级比特域的比特状态为第一比特状态。
应理解，装置300中，接收单元对应的实体设备为接收器，处理单元对应的实体设备为处理器，发送单元对应的实体设备为发射器。
应理解，这里的装置300以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置300可以具体为上述实施例中的终端设备，装置300可以用于执行上述方法实施例中与终端设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
在采用对应各个功能划分各个功能模块的情况下，图4示出了上述和实施例中涉及的传输下行信道的装置的一种可能的组成示例，该传输下行信道的装置能执行本申请各方法实施例中任一方法实施例中网络设备所执行的步骤，如图4所示，所述传输下行信道的装置为网络设备或支持网络设备实现实施例中提供的方法的传输下行信道的装置，例如该传输下行信道的装置可以是芯片系统。该装置400包括：处理单元410和发送单元420。
在一种可能的实现方式中，该处理单元410用于：将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI，以及根据所述目标TCI与第一信息之间的对应关系，确定所述PDCCH对应的第一信息；该发送单元420用于：根据所述第一信息和所述处理单元410确定的所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI，以及根据所述DCI和所述目标TCI，发送所述第一下行信道。
示例性地，所述第一信息为下列信息中的至少一个：所述PDCCH所在的搜索空间的标识；或者，所述PDCCH所在的搜索空间的类型；或者，PDCCH对应的检测周期；或者，所述PDCCH对应的控制信息资源的数量；或者，所述PDCCH对应的控制信息资源的时域位置；或者，所述PDCCH对应的候选PDCCH索引；或者，所述PDCCH对应的控制资源元素CCE索引；或者，所述PDCCH对应的资源元素组REG索引；或者，所述PDCCH对应的无线网络临时标识RNTI；或者，所述PDCCH的传输时间与所述第一下行 信道的传输时间之间的时间差；或者，所述至少两个PDCCH的控制信息资源的索引；或者，所述至少两个TCI的索引。
示例性地，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
示例性地，所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
示例性地，该装置还包括：接收单元，用于接收能力信息，所述能力信息用于表示终端设备能够接收至少两个PDCCH；和/或，所述发送单元420还用于：发送第一配置信息，所述第一配置信息用于配置终端设备接收至少两个PDCCH。
示例性地，该处理单元410具体用于：在满足下列条件中的至少一个的情况下，将所述PDCCH对应的TCI确定为所述目标TCI：加扰所述PDCCH的RNTI为第一RNTI；或者，所述PDCCH对应的搜索空间为第一搜索空间；或者，所述DCI的格式为第一DCI格式；或者，所述控制信息资源属于第一控制信息资源组；或者，所述DCI的优先级比特域的比特状态为第一比特状态。
在另一种可能的实现方式中，该处理单元410用于：将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI；该发送单元420用于：发送高层信令，所述高层信令用于指示所述处理单元410确定的所述目标TCI，以及根据所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI；该发送单元420还用于：根据所述DCI和所述目标TCI，发送所述第一下行信道。
示例性地，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
示例性地，所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
示例性地，该装置还包括：接收单元，用于接收能力信息，所述能力信息用于表示终端设备能够接收至少两个PDCCH；和/或，所述发送单元420还用于：发送第一配置信息，所述第一配置信息用于配置终端设备接收至少两个PDCCH。
示例性地，该处理单元410具体用于：在满足下列条件中的至少一个的情况下，将所述PDCCH对应的TCI确定为所述目标TCI：加扰所述PDCCH的RNTI为第一RNTI；或者，所述PDCCH对应的搜索空间为第一搜索空间；或者，所述DCI的格式为第一DCI格式；或者，所述控制信息资源属于第一控制信息资源组；或者，所述DCI的优先级比特域的比特状态为第一比特状态。
应理解，装置400中，处理单元对应的实体设备为处理器，发送单元对应的实体设备为发射器。
应理解，这里的装置400以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置400可以具体为上述实施例中的第一网络设备，装置400可以用于执行上述方法实施例中与第一网络设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
上述各个方案的装置300和装置400分别具有实现上述方法中终端设备和第一网络设备执行的相应步骤的功能；所述功能可以通过硬件实现，也可以通过硬件执行相应的软件 实现。所述硬件或软件包括一个或多个与上述功能相对应的模块；例如发送单元可以由发射机替代，接收单元可以由接收机替代，其它单元，如确定单元等可以由处理器替代，分别执行各个方法实施例中的收发操作以及相关的处理操作。即上述接收单元可以是接收器，发送单元可以是发送器，处理单元可以是处理器。
在本申请的实施例，图3和图4中的装置也可以是芯片或者芯片系统，例如：片上系统(system on chip，SoC)。对应的，接收单元和发送单元可以是该芯片的收发电路，在此不做限定。
图5示出了上述实施例中所涉及的网络设备的一种可能的结构示意图。图5所示的网络设备500包括发射器/接收器501、控制器/处理器502和存储器503。
其中，发射器/接收器501用于支持网络设备与上述实施例中的所述的终端设备之间收发信息。所述控制器/处理器502执行各种用于与终端设备通信的功能。在上行链路，来自所述终端设备的上行链路信号经由天线接收，由接收器501进行调解，并进一步由控制器/处理器502进行处理来恢复终端设备所发送到业务数据和信令信息。在下行链路上，业务数据和信令消息由控制器/处理器502进行处理，并由发射器501进行调解来产生下行链路信号，并经由天线发射给终端设备。控制器/处理器502还执行实施例200中涉及网络设备的处理过程和/或用于本申请所描述的技术的其他过程。存储器503用于存储网络设备的程序代码和数据。
示例性地，所述控制器/处理器502用于：将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI，以及根据所述目标TCI与第一信息之间的对应关系，确定所述PDCCH对应的第一信息；根据所述第一信息和所述处理单元确定的所述目标TCI；所述发射器/接收器501用于：在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI。
示例性地，所述控制器/处理器502用于：将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI；通过该收发器520发送高层信令，所述高层信令用于指示所述处理单元确定的所述目标TCI，以及根据所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI。
应理解，网络设备500可以具体为上述实施例中的第一网络设备，并且可以用于执行上述方法实施例中与第一网络设备对应的各个步骤和/或流程。可选地，该存储器503可以包括只读存储器和随机存取存储器，并向控制器/处理器502提供指令和数据。存储器503的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该控制器/处理器502可以用于执行存储器中存储的指令，并且当该控制器/处理器502执行存储器中存储的指令时，该控制器/处理器502用于执行上述与第一网络设备对应的方法实施例的各个步骤和/或流程。
图6示出了上述实施例中所涉及的终端设备的一种可能的设计结构的简化示意图。图6所示的终端设备600包括发射器601、接收器602、控制器/处理器603、存储器604和调制解调处理器605。
其中，发射器601用于发送上行链路信号，该上行链路信号经由天线发射给上述实施例中所述的网络设备。在下行链路上，天线接收上述实施例中网络设备发射的下行链路信号(DCI)。接收器602用于接收从天线接收到的下行链路信号(DCI)。在调制解调处 理器605中，编码器606接收要在上行链路上发送的业务数据和信令消息，并对业务数据和信令消息进行处理。调制器607进一步处理(例如，符号映射和调制)编码后的业务数据和信令消息并提供输出采样。解调器605处理(例如，解调)该输入采样并提供符号估计。解码器608处理(例如，解码)该符号估计并提供发送给终端设备的已解码的数据和信令消息。编码器606、调制器607、解码器608和解调器609可以由合成的调制解调处理器605来实现。这些单元根据无线接入网采用的无线接入技术来进行处理。
控制器/处理器603对终端设备的动作进行控制管理，用于执行上述实施例200中由终端设备进行的处理。示例性地，该接收器602用于：在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，所述至少两个PDCCH承载的下行控制信息DCI相同，所述DCI用于指示第一下行信道对应的时频资源；该控制器/处理器603用于：获取所述至少两个控制信息资源对应的至少两个传输配置指示TCI，以及从所述至少两个TCI中确定目标TCI，所述目标TCI为所述第一下行信道对应的TCI；该接收器602用于：根据所述DCI和所述处理单元确定的所述目标TCI，接收所述第一下行信道。
应理解，终端设备600可以具体为上述实施例中的终端设备，并且可以用于执行上述方法实施例中与终端设备对应的各个步骤和/或流程。可选地，该存储器604可以包括只读存储器和随机存取存储器，并向控制器/处理器603提供指令和数据。存储器604的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该控制器/处理器603可以用于执行存储器中存储的指令，并且当该控制器/处理器603执行存储器中存储的指令时，该控制器/处理器603用于执行上述与终端设备对应的方法实施例的各个步骤和/或流程。
在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器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。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
在本申请中，“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-b，a-c，b-c或a-b-c，其中a，b，c可以是单个，也可以是多个。
本领域普通技术人员可以意识到，结合本文中所公开的实施例中描述的各方法步骤和 单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各实施例的步骤及组成。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域普通技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (36)

  1. 一种传输下行信道的方法，其特征在于，包括：
    终端设备在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，所述至少两个PDCCH承载的下行控制信息DCI相同，所述DCI用于指示第一下行信道对应的时频资源；
    所述终端设备获取所述至少两个控制信息资源对应的至少两个传输配置指示TCI；
    所述终端设备从所述至少两个TCI中确定目标TCI，所述目标TCI为所述第一下行信道对应的TCI；
    所述终端设备根据所述DCI和所述目标TCI，接收所述第一下行信道。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备从所述至少两个TCI中确定目标TCI，包括：
    所述终端设备根据下列信息中的至少一个，从所述至少两个TCI中确定目标TCI：
    所述至少两个PDCCH所在的搜索空间的标识；或者，
    所述至少两个PDCCH所在的搜索空间的类型；或者，
    所述至少两个PDCCH对应的检测周期；或者，
    所述至少两个PDCCH对应的控制信息资源的数量；或者，
    所述至少两个PDCCH对应的控制信息资源的时域位置；或者，
    所述至少两个PDCCH对应的候选PDCCH索引；或者，
    所述至少两个PDCCH对应的控制资源元素CCE索引；或者，
    所述至少两个PDCCH对应的资源元素组REG索引；或者，
    所述至少两个PDCCH对应的无线网络临时标识RNTI；或者，
    所述至少两个PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，
    所述至少两个PDCCH的控制信息资源的索引；或者，
    所述至少两个TCI的索引。
  3. 根据权利要求1所述的方法，其特征在于，在所述终端设备从所述至少两个TCI中确定目标TCI之前，所述方法还包括：
    所述终端设备接收高层信令，所述高层信令用于指示所述目标TCI。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述目标TCI对应的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述至少两个PDCCH中最后一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第二阈值；或者，
    所述至少两个PDCCH中第一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于所述第二阈值。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备发送能力信息，所述能力信息用于表示所述终端设备能够接收至少两个PDCCH；和/或，
    所述终端设备接收第一配置信息，所述第一配置信息用于配置所述终端设备接收至少两个PDCCH。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述终端设备从所述至少两个TCI中确定目标TCI，包括：
    在满足下列条件中的至少一个的情况下，所述终端设备从所述至少两个TCI中确定目标TCI：
    加扰所述至少两个PDCCH的RNTI为第一RNTI；或者，
    所述至少两个PDCCH对应的搜索空间为第一搜索空间；或者，
    所述DCI的格式为第一DCI格式；或者，
    所述至少两个控制信息资源属于第一控制信息资源组；或者，
    所述DCI的优先级比特域的比特状态为第一比特状态。
  9. 一种传输下行信道的方法，其特征在于，包括：
    第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI；
    所述第一网络设备根据所述目标TCI与第一信息之间的对应关系，确定所述PDCCH对应的第一信息；
    所述第一网络设备根据所述第一信息和所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI。
  10. 根据权利要求9所述的方法，其特征在于，所述第一信息为下列信息中的至少一个：
    所述PDCCH所在的搜索空间的标识；或者，
    所述PDCCH所在的搜索空间的类型；或者，
    所述PDCCH对应的检测周期；或者，
    所述PDCCH对应的控制信息资源的数量；或者，
    所述PDCCH对应的控制信息资源的时域位置；或者，
    所述PDCCH对应的候选PDCCH索引；或者，
    所述PDCCH对应的控制资源元素CCE索引；或者，
    所述PDCCH对应的资源元素组REG索引；或者，
    所述PDCCH对应的无线网络临时标识RNTI；或者，
    所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，
    所述至少两个PDCCH的控制信息资源的索引；或者，
    所述至少两个TCI的索引。
  11. 一种传输下行信道的方法，其特征在于，包括：
    第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI；
    所述第一网络设备发送高层信令，所述高层信令用于指示所述目标TCI；
    所述第一网络设备根据所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI。
  12. 根据权利要求9至11中任一项所述的方法，其特征在于，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
  13. 根据权利要求9至12中任一项所述的方法，其特征在于，所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
  14. 根据权利要求9至13中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备接收能力信息，所述能力信息用于表示终端设备能够接收至少两个PDCCH；和/或，
    所述第一网络设备发送第一配置信息，所述第一配置信息用于配置终端设备接收至少两个PDCCH。
  15. 根据权利要求9至14中任一项所述的方法，其特征在于，所述第一网络设备将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI，包括：
    在满足下列条件中的至少一个的情况下，所述第一网络设备将所述PDCCH对应的TCI确定为所述目标TCI：
    加扰所述PDCCH的RNTI为第一RNTI；或者，
    所述PDCCH对应的搜索空间为第一搜索空间；或者，
    所述DCI的格式为第一DCI格式；或者，
    所述控制信息资源属于第一控制信息资源组；或者，
    所述DCI的优先级比特域的比特状态为第一比特状态。
  16. 一种传输下行信道的装置，其特征在于，包括：
    接收单元，用于在至少两个控制信息资源上接收至少两个物理下行控制信道PDCCH，所述至少两个PDCCH承载的下行控制信息DCI相同，所述DCI用于指示第一下行信道对应的时频资源；
    处理单元，用于获取所述至少两个控制信息资源对应的至少两个传输配置指示TCI，以及从所述至少两个TCI中确定目标TCI，所述目标TCI为所述第一下行信道对应的TCI；
    所述接收单元用于：根据所述DCI和所述处理单元确定的所述目标TCI，接收所述第一下行信道。
  17. 根据权利要求16所述的装置，其特征在于，所述处理单元具体用于：
    根据下列信息中的至少一个，从所述至少两个TCI中确定目标TCI：
    所述至少两个PDCCH所在的搜索空间的标识；或者，
    所述至少两个PDCCH所在的搜索空间的类型；或者，
    所述至少两个PDCCH对应的检测周期；或者，
    所述至少两个PDCCH对应的控制信息资源的数量；或者，
    所述至少两个PDCCH对应的控制信息资源的时域位置；或者，
    所述至少两个PDCCH对应的候选PDCCH索引；或者，
    所述至少两个PDCCH对应的控制资源元素CCE索引；或者，
    所述至少两个PDCCH对应的资源元素组REG索引；或者，
    所述至少两个PDCCH对应的无线网络临时标识RNTI；或者，
    所述至少两个PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，
    所述至少两个PDCCH的控制信息资源的索引；或者，
    所述至少两个TCI的索引。
  18. 根据权利要求16所述的装置，其特征在于，所述接收单元还用于：
    接收高层信令，所述高层信令用于指示所述目标TCI。
  19. 根据权利要求16至18中任一项所述的装置，其特征在于，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
  20. 根据权利要求16至19中任一项所述的装置，其特征在于，所述目标TCI对应的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
  21. 根据权利要求16至20中任一项所述的装置，其特征在于，所述至少两个PDCCH中最后一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第二阈值；或者，
    所述至少两个PDCCH中第一次传输的PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于所述第二阈值。
  22. 根据权利要求16至21中任一项所述的装置，其特征在于，所述装置还包括：
    发送单元，用于发送能力信息，所述能力信息用于表示所述装置能够接收至少两个PDCCH；和/或，
    所述接收单元还用于：接收第一配置信息，所述第一配置信息用于配置所述装置接收至少两个PDCCH。
  23. 根据权利要求16至22中任一项所述的装置，其特征在于，所述处理单元具体用于：
    在满足下列条件中的至少一个的情况下，从所述至少两个TCI中确定目标TCI：
    加扰所述至少两个PDCCH的RNTI为第一RNTI；或者，
    所述至少两个PDCCH对应的搜索空间为第一搜索空间；或者，
    所述DCI的格式为第一DCI格式；或者，
    所述至少两个控制信息资源属于第一控制信息资源组；或者，
    所述DCI的优先级比特域的比特状态为第一比特状态。
  24. 一种传输下行信道的装置，其特征在于，包括：
    处理单元，用于将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI，以及根据所述目标TCI与第一信息之间的对应关系，确定所述PDCCH对应的第一信息；
    发送单元，用于根据所述第一信息和所述处理单元确定的所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI。
  25. 根据权利要求24所述的装置，其特征在于，所述第一信息为下列信息中的至少一个：
    所述PDCCH所在的搜索空间的标识；或者，
    所述PDCCH所在的搜索空间的类型；或者，
    所述PDCCH对应的检测周期；或者，
    所述PDCCH对应的控制信息资源的数量；或者，
    所述PDCCH对应的控制信息资源的时域位置；或者，
    所述PDCCH对应的候选PDCCH索引；或者，
    所述PDCCH对应的控制资源元素CCE索引；或者，
    所述PDCCH对应的资源元素组REG索引；或者，
    所述PDCCH对应的无线网络临时标识RNTI；或者，
    所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差；或者，
    所述至少两个PDCCH的控制信息资源的索引；或者，
    所述至少两个TCI的索引。
  26. 一种传输下行信道的装置，其特征在于，包括：
    处理单元，用于将物理下行控制信道PDCCH对应的TCI确定为第一下行信道对应的目标TCI；
    发送单元，用于发送高层信令，所述高层信令用于指示所述处理单元确定的所述目标TCI，以及根据所述目标TCI，在控制信息资源上发送所述PDCCH，所述PDCCH承载下行控制信息DCI。
  27. 根据权利要求24至26中任一项所述的装置，其特征在于，所述DCI中不携带用于指示所述第一下行信道对应的TCI的指示信息。
  28. 根据权利要求24至27中任一项所述的装置，其特征在于，所述PDCCH的传输时间与所述第一下行信道的传输时间之间的时间差大于或等于第一阈值。
  29. 根据权利要求24至28中任一项所述的装置，其特征在于，所述装置还包括：
    接收单元，用于接收能力信息，所述能力信息用于表示终端设备能够接收至少两个PDCCH；和/或，
    所述发送单元还用于：发送第一配置信息，所述第一配置信息用于配置终端设备接收至少两个PDCCH。
  30. 根据权利要求24至29中任一项所述的装置，其特征在于，所述处理单元具体用于：
    在满足下列条件中的至少一个的情况下，将所述PDCCH对应的TCI确定为所述目标TCI：
    加扰所述PDCCH的RNTI为第一RNTI；或者，
    所述PDCCH对应的搜索空间为第一搜索空间；或者，
    所述DCI的格式为第一DCI格式；或者，
    所述控制信息资源属于第一控制信息资源组；或者，
    所述DCI的优先级比特域的比特状态为第一比特状态。
  31. 一种计算机可读存储介质，其特征在于，包括：计算机软件指令；当所述计算机软件指令在传输下行信道装置或内置在传输下行信道装置的芯片中运行时，使得所述装置执行如权利要求1-10中任一项所述的传输下行信道的方法。
  32. 一种计算机可读存储介质，其特征在于，包括：计算机软件指令；当所述计算机软件指令在传输下行信道装置或内置在传输下行信道装置的芯片中运行时，使得所述装置执行如权利要求11-15中任一项所述的传输下行信道的方法。
  33. 一种传输下行信道的装置，其特征在于，包括：存储器和处理器；所述存储器用于存储计算机程序，当所述处理器调用所述存储器中的计算机程序时，所述通信装置执行如权利要求1-10中任一项所述的方法。
  34. 一种传输下行信道的装置，其特征在于，包括：存储器和处理器；所述存储器用于存储计算机程序，当所述处理器调用所述存储器中的计算机程序时，所述通信装置执行如权利要求11-15中任一项所述的方法。
  35. 一种计算机程序产品，所述计算机程序产品中包括计算机程序代码，其特征在于，当所述计算机程序代码在计算机上运行时，使得计算机实现权利要求1-10中任一项所述的通信方法。
  36. 一种计算机程序产品，所述计算机程序产品中包括计算机程序代码，其特征在于，当所述计算机程序代码在计算机上运行时，使得计算机实现权利要求11-15中任一项所述的通信方法。
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