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WO2022261964A1 - Procédé de transmission de liaison descendante, terminal et périphérique de réseau - Google Patents

Procédé de transmission de liaison descendante, terminal et périphérique de réseau Download PDF

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Publication number
WO2022261964A1
WO2022261964A1 PCT/CN2021/101030 CN2021101030W WO2022261964A1 WO 2022261964 A1 WO2022261964 A1 WO 2022261964A1 CN 2021101030 W CN2021101030 W CN 2021101030W WO 2022261964 A1 WO2022261964 A1 WO 2022261964A1
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WIPO (PCT)
Prior art keywords
search space
pdcch
coreset
type
pdsch
Prior art date
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PCT/CN2021/101030
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English (en)
Chinese (zh)
Inventor
陈文洪
史志华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202180095950.5A priority Critical patent/CN117044268A/zh
Priority to PCT/CN2021/101030 priority patent/WO2022261964A1/fr
Publication of WO2022261964A1 publication Critical patent/WO2022261964A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the present application relates to the field of communication technologies, and more specifically, relates to a downlink transmission method, a terminal and a network device.
  • the terminal After the terminal receives the configuration of the first search space, the terminal will configure the physical downlink control channel (physical downlink control channel, PDCCH) in the first search space and/or the physical downlink shared channel (physical downlink shared channel, PDCCH) scheduled by the PDCCH PDSCH) for detection.
  • PDCCH physical downlink control channel
  • PDCCH physical downlink shared channel
  • multiple transmission/reception points will simultaneously transmit the PDSCH/PDCCH of a terminal device, and Possibly Doppler precompensation for PDSCH/PDCCH.
  • TRP transmission/reception points
  • the PDCCH in the common control channel or the PDSCH scheduled by the PDCCH is sent to a group of terminal devices, and the network side cannot pre-compensate these downlink signals, and in some cases even cannot perform SFN transmission.
  • control resource set control resource set, CORESET
  • CCS common search space
  • USS user equipment specific search space
  • the present application provides a downlink transmission method, a terminal and a network device, which can improve the detection performance of PDCCH and/or PDSCH in an SFN scenario.
  • a downlink transmission method including: a terminal receives a configuration of a first search space, and the CORESET associated with the first search space is activated with two transmission configuration indicator (transmission configuration indicator, TCI) states; the The terminal performs the PDCCH in the first search space and/or the Detection of PDSCH scheduled by PDCCH.
  • TCI transmission configuration indicator
  • a downlink transmission method including: a network device sends a configuration of a first search space, and the CORESET associated with the first search space is activated in two TCI states; the network device sends a configuration according to the first search space
  • the type of the space or the type of the search space associated with the CORESET is used to transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • a terminal including: a communication unit, configured to receive a configuration of a first search space, and the CORESET associated with the first search space is activated in two TCI states; a detection unit, configured to receive the configuration according to the first search space A type of search space or a type of search space associated with the CORESET, based on at least one TCI state in the two TCI states, perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH detection.
  • a network device including: a communication unit, configured to send a configuration of a first search space, and the CORESET associated with the first search space is activated with two TCI states; according to the configuration of the first search space type or the type of the search space associated with the CORESET, and transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • a terminal including a memory and a processor, the memory is used to store programs, and the processor is used to invoke the programs in the memory to execute the method according to the first aspect.
  • a network device including a memory and a processor, the memory is used to store a program, and the processor is used to invoke the program in the memory to execute the method described in the second aspect.
  • an apparatus including a processor, configured to call a program from a memory to execute the method described in the first aspect.
  • an apparatus including a processor, configured to call a program from a memory to execute the method described in the second aspect.
  • a ninth aspect provides a chip, including a processor, configured to call a program from a memory, so that a device installed with the chip executes the method described in the first aspect.
  • a chip including a processor, configured to call a program from a memory, so that a device installed with the chip executes the method described in the second aspect.
  • a computer-readable storage medium on which a program is stored, and the program causes a computer to execute the method described in the first aspect.
  • a computer-readable storage medium on which a program is stored, and the program causes a computer to execute the method described in the second aspect.
  • a thirteenth aspect provides a computer program product, including a program, the program causes a computer to execute the method described in the first aspect.
  • a fourteenth aspect provides a computer program product, including a program, the program causes a computer to execute the method described in the second aspect.
  • a fifteenth aspect provides a computer program, the computer program causes a computer to execute the method described in the first aspect.
  • a sixteenth aspect provides a computer program, the computer program causes a computer to execute the method described in the second aspect.
  • the terminal After the network device configures the first search space for the terminal, the terminal detects the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the first search space or the type of the search space associated with the CORESET. Therefore, the terminal can select an appropriate detection method for the PDCCH and/or the PDSCH scheduled by the PDCCH for different types of search spaces, thereby improving the detection performance of the PDCCH and/or PDCCH in the SFN scenario.
  • Fig. 1 is an example diagram of a wireless communication system 100 applied in the embodiment of the present application.
  • FIG. 2 is an example diagram of a PDCCH detection method.
  • Fig. 3 is an example diagram of the relationship between CORESET and search space.
  • Fig. 4 is a schematic flowchart of a downlink transmission method provided by an embodiment of the present application.
  • Fig. 5 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 6 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 7 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 8 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 9 is a schematic flow chart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 10 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 11 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 12 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 13 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 14 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 15 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • Fig. 16 is a schematic flowchart of a downlink transmission method provided by another embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of an apparatus for downlink transmission according to an embodiment of the present application.
  • FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.
  • the wireless communication system 100 may include a network device 110 and a terminal 120 .
  • the network device 110 may be a device that communicates with the terminal 120 .
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with the terminals 120 located within the coverage area.
  • FIG. 1 exemplarily shows one network device and two terminals 120 .
  • the wireless communication system 100 may include multiple network devices and each network device may include one or more than two terminals within the coverage area, which is not limited in this embodiment of the present application.
  • the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • UMTS universal mobile telecommunications system
  • new radio new radio, NR
  • 5G fifth generation mobile communication system
  • a terminal may also include, but not limited to, a mobile station (mobile station, MS), a mobile terminal (mobile terminal), a mobile phone (mobile telephone), a user equipment (user equipment, UE), Mobile phone (handset), portable equipment (portable equipment), etc., the terminal can communicate with one or more core networks via a radio access network (radio access network, RAN).
  • a terminal may be a mobile telephone (or "cellular" telephone), a computer with wireless communication capabilities, or the like.
  • the terminal may also be a portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device.
  • the network device may be an access network device, such as a base station, a TRP, or an access point.
  • the base station can be a base transceiver station (BTS) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolved base station (evolved Node B, eNB or e-NodeB) in LTE, or It may be an NR or 5G base station (gNB), which is not specifically limited in this embodiment of the present application.
  • BTS base transceiver station
  • NodeB base station
  • eNB evolved base station
  • gNB 5G base station
  • the communication link between the terminal and the network device can be divided into an uplink (a communication link from a terminal to a network device) and a downlink (a communication link from a network device to a terminal).
  • the terminal can send uplink control information to the network device through the physical uplink control channel (PUCCH), and can send uplink information to the network device through the physical uplink shared channel (PUSCH). data.
  • the terminal can send downlink control information to the network device through the PDCCH, and can send downlink data to the network device through the PDSCH.
  • the terminal After the network device sends the PDCCH to the terminal, the terminal needs to detect and/or receive the PDCCH. Before detecting the PDCCH, the terminal usually needs to determine which resource to detect the PDCCH, that is, determine the resource to detect the PDCCH (or the resource location or the physical resource location to detect the PDCCH). In some communication systems (such as NR systems), the network device can configure CORESET and search space for the terminal, so that the terminal can determine the resources for detecting the PDCCH.
  • the CORESET can be used to determine the frequency domain resource size, time domain resource size and frequency domain resource position of the PDCCH in a time slot.
  • the size of the frequency domain resource may be, for example, the number of physical resource blocks (physical resource blocks, PRBs) occupied by the frequency domain resource.
  • the time-domain resource size may be, for example, the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the time-domain resource.
  • the frequency domain resource location may include, for example, the starting location and length of the frequency domain resource.
  • the search space can be used to determine the time-domain resource location of the PDCCH.
  • the time-domain resource location may include, for example, the start location and monitoring period of the time-domain resource.
  • the terminal can determine resources for detecting the PDCCH according to the configuration of the CORESET and the search space. As shown in FIG. 2 , the terminal can use the CORESET configuration to determine that the location of the frequency domain resources is between the frequency domains represented by the two dashed lines in FIG. 2 . In addition, the terminal may determine that the starting position of the time domain resource is symbol 3 of the time slot 0 in combination with the CORESET and the configuration of the search space, and the monitoring period of the PDCCH is one time slot. Based on the above information, the terminal can determine to detect the PDCCH on the time-frequency resource corresponding to the shaded part in FIG. 2 .
  • the network device can configure one or more CORESETs for the terminal through high-level signaling (such as radio resource control (RRC) signaling) (in some embodiments, the network device can configure up to three CORESETs for the terminal).
  • Each CORESET can have its own CORESET ID.
  • the network device configures three CORESETs for the terminal through RRC signaling, namely CORESET 1, CORESET 2 and CORESET 3.
  • the network device can also configure at least one search space for the terminal through high-level signaling (such as RRC signaling).
  • the configuration of each search space may include the ID of the CORESET associated with the search space, the aggregation level of the search space, and the type of the search space.
  • each search space is associated with a CORESET, and a CORESET can be associated with multiple search spaces.
  • the network device can associate CORESET 1 with CSS1 and CSS2 through high-level signaling, associate CORESET 2 with CSS3, USS1, and USS2, and associate CORESET 3 with USS3, USS4, and USS5 in the Together.
  • each CORESET can be associated with multiple search spaces.
  • the multiple search spaces may be of the same type or of different types. However, each search space is usually associated with only one CORESET.
  • the configuration related to the search space type may include the configuration of the search space type (searchSpaceType) and the configuration of the downlink control information (DCI) format that the terminal needs to detect in the search space.
  • searchSpaceType the configuration of the search space type
  • DCI downlink control information
  • the search space type configuration can be used to indicate whether the search space is CSS or USS.
  • the search space type of the search space is configured as common, and the DCI formats to be detected in the search space include at least one of the following DCI formats: DCI format 2_0, DCI format 2_1, DCI format 2_2 , DCI format 2_3, DCI format 0_0 and DCI format 1_0, etc. It can be seen from the type of DCI format that the CSS needs to detect, the DCI is generally used to schedule transmission of control information, for example, to schedule system messages sent to a group of terminals.
  • the DCI formats to be detected in the search space include DCI format 0_0 and DCI format 1_0 (formats0-0-And-1-0), or include DCI format 0_1 and DCI format 1_1 (formats0-1- And-1-1). It can be seen from the DCI format that the USS needs to detect, the DCI is generally used to schedule the transmission of uplink or downlink data of a single UE.
  • QCL Quasi co-location
  • network devices can configure corresponding TCI states for downlink signals or downlink channels.
  • the TCI status can be used to indicate the corresponding downlink signal or the QCL reference signal corresponding to the downlink channel.
  • the terminal may detect the downlink signal or downlink channel based on the reference signal.
  • the TCI state may contain TCI state ID, QCL information 1 and QCL information 2.
  • a TCI state ID can be used to identify a TCI state.
  • the QCL information may include the configuration of the QCL type and the configuration of the QCL reference signal.
  • the QCL type can be one of QCL-TypeA, QCL-TypeB, QCL-TypeC or QCL-TypeD.
  • the QCL type of one of QCL information in QCL information 1 and QCL information 2 is usually configured as one of QCL-TypeA, QCL-TypeB, and QCL-TypeC. If two kinds of QCL information are configured in the TCI state, the QCL type of the other QCL information is usually configured as QCL-TypeD.
  • QCL parameters corresponding to different QCL types may be different.
  • QCL parameters corresponding to QCL-TypeA, QCL-TypeB, QCL-TypeC and QCL-TypeD can be configured as follows:
  • QCL-TypeA ⁇ Doppler shift (doppler shift), Doppler spread (doppler spread), average delay (average delay), delay spread (delay spread) ⁇ ;
  • QCL-TypeB ⁇ Doppler frequency shift, Doppler spread ⁇
  • QCL-TypeC ⁇ Doppler frequency shift, average delay ⁇
  • QCL-TypeD ⁇ spatial Rx parameter ⁇ .
  • the configuration of the QCL reference signal may include a cell ID where the reference signal is located, a bandwidth part (bandwidth part, BWP) ID and an identifier of the reference signal.
  • the identifier of the reference signal can be the CSI-RS resource ID;
  • the QCL reference signal is used as the synchronization signal and the physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB) as an example, the identifier of the reference signal may be the index of the SSB.
  • the terminal can assume that the downlink channel
  • the same large-scale parameters (such as Doppler shift, Doppler spread, average delay or delay spread) are used for channel and SSB or CSI-RS transmission. Therefore, the terminal can use the same large-scale parameter to detect the downlink channel.
  • the specific type of large-scale parameters can be determined by the QCL type.
  • the large-scale parameters can include the following four parameters: Doppler frequency shift, Doppler spread, average delay and delay spread; taking the QCL type as QCL-TypeB as an example, Then the large-scale parameters may include the following two parameters: Doppler frequency shift and Doppler spread.
  • the terminal can use the same receiving beam as the SSB or CSI-RS (ie spatial Rx parameter) to detect the downlink channel.
  • the network equipment will transmit the downlink channel and the SSB or CSI-RS in the same TRP, the same panel (panel) or the same beam. If the TRPs, panels or beams for transmitting two downlink signals or two downlink channels are different, the network device will generally configure different TCI states for the two downlink signals or downlink channels.
  • the available TCI state set can be indicated through RRC signaling first, and some TCIs in the available TCI state set can be activated through the signaling of the media access control (MAC) layer. state. Then, one or two TCI states can be indicated from the activated TCI states through the TCI state indication field in the downlink control information (DCI), so as to be used for the detection of the PDSCH scheduled by the DCI.
  • DCI downlink control information
  • the TCI state can indicate the TCI state corresponding to the downlink control channel through RRC signaling or a combination of RRC signaling and MAC signaling.
  • the MAC control element (MAC control element, MAC CE) can configure a TCI state for each CORESET, which is used for detection of the PDCCH associated with the CORESET.
  • the network device may transmit the PDCCH in two TRPs.
  • the network device can configure two TCI states for each CORESET through MAC CE.
  • the terminal can detect the PDCCH according to the two TCI states, for example, the terminal can use the QCL reference signal indicated by the two TCI states to perform channel estimation on the PDCCH, so as to detect the PDCCH.
  • the PDCCH is configured with SFN transmission without pre-compensation, all QCL parameters of the two TCI states can be used for PDCCH detection.
  • part of the QCL parameters in one of the two TCI states cannot be used for channel estimation of the PDCCH.
  • a CORESET will be configured with two TCI states, and the PDCCH in the search space associated with the CORESET and the PDSCH scheduled by the PDCCH need to use the two TCI states for detection.
  • the network device can use different TRPs to send the same PDCCH and PDSCH to a single terminal, and the PDCCH and PDSCH Perform precompensation.
  • the network device cannot perform pre-compensation on the PDCCH or PDSCH, or even perform SFN transmission.
  • the terminal uses the same method to detect all search spaces, the detection performance of some search spaces will deteriorate due to the difference from the actual transmission method on the network side. .
  • Fig. 4 is a schematic flowchart of a downlink transmission method provided by an embodiment of the present application.
  • the terminal receives the configuration of the first search space.
  • the first search space may be any search space configured by the network device for the terminal.
  • the configuration of the first search space may include a CORESET ID.
  • the terminal can determine the CORESET associated with the first search space according to the CORESET ID.
  • the CORESET associated with the first search space is activated (or configured) with at least two TCI states.
  • a network device can activate two TCI states for this CORESET through MAC CE.
  • the CORESET associated with the first search space has two TCI states activated, indicating that the CORESET is configured with SFN-based transmission.
  • the network device can simultaneously transmit the CORESET to the terminal through two TRPs.
  • the data transmitted on the two TRPs may be completely the same.
  • the CORESET can be configured with SFN transmission based on pre-compensation, or can be configured with SFN transmission not based on pre-compensation (SFN transmission not based on pre-compensation can also be called scheme 1SFN transmission). Whether the CORESET is configured with pre-compensated SFN transmission or not pre-compensated SFN transmission can be determined by the network device. For example, the network device may send RRC signaling to the terminal. RRC signaling can be used to configure CORESET to perform SFN transmission based on pre-compensation, or to configure CORESET to perform SFN transmission not based on pre-compensation, or to configure CORESET not to perform SFN transmission.
  • the network device can simultaneously transmit the CORESET to the terminal through two TRPs.
  • the data transmitted on the two TRPs can be exactly the same, but the signal transmitted on one of the TRPs passes through the Doppler Doppler precompensation, while the signal transmitted on the other TRP is not Doppler precompensated.
  • the network device can transmit the CORESET to the terminal through two TRPs at the same time, the data transmitted by the two TRPs can be exactly the same, and the signals of the two TRPs have not been Doppler precompensation, or the signals of both TRPs undergo the same Doppler precompensation.
  • the terminal may perform the second search space based on at least one of the two TCI states according to the type of the first search space or the type of the search space (including the first search space) associated with the CORESET. Detection of PDCCH and/or PDSCH scheduled by PDCCH in a search space.
  • the terminal may perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH Detection, so that when the type of the first search space or the type of the search space associated with the CORESET is different, the detection modes of the PDCCH and/or the PDSCH scheduled by the PDCCH in the first search space are different.
  • the terminal performs the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH It is detected that when the type of the first search space or the type of the search space associated with the CORESET is different, the receiving manners of the PDCCH and/or the PDSCH scheduled by the PDCCH in the first search space are different.
  • the terminal performs the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH Detecting that when the type of the first search space or the type of the search space associated with the CORESET is different, the QCL assumptions used to receive the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH are different.
  • the terminal may detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the first search space. For example, if the type of the first search space is CSS, the first detection method can be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH; if the type of the first search space is USS, the detection method can be used The second detection manner different from the first detection manner detects the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the terminal may also detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the search space associated with the CORESET. For example, if at least one search space associated with the CORESET is CSS or all search spaces associated with the CORESET are CSS, the first detection method may be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH; if the CORESET At least one associated search space is USS or all search spaces associated with CORESET are USS, then a second detection method different from the first detection method can be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH .
  • the terminal can detect the PDCCH in the first search space according to the type of the first search space or the type of the search space associated with the CORESET, or can detect the PDCCH according to the type of the first search space or the type of the search space associated with the CORESET.
  • the detection of the PDSCH scheduled by the PDCCH in the first search space may also be performed simultaneously according to the type of the first search space or the type of the search space associated with the CORESET.
  • the terminal if the terminal detects the PDSCH scheduled by the PDCCH in the first search space according to the type of the first search space or the type of the search space associated with the CORESET, then the PDCCH used to schedule the PDSCH (the PDCCH and The scheduling interval between the PDSCHs is greater than the threshold value reported by the terminal) may not include the TCI state indication field.
  • the format of the DCI carried by the PDCCH may be format 1_0.
  • the format of the DCI carried by the PDCCH is DCI format 1_1 and 1_2, and the RRC parameter tci-PresentInDCI is configured as disabled.
  • the terminal detects the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the first search space or the type of the search space associated with the CORESET. Therefore, the terminal can select an appropriate detection method for the PDCCH and/or the PDSCH scheduled by the PDCCH for different types of search spaces, thereby improving the detection performance of the PDCCH and/or PDCCH in the SFN scenario.
  • step S420 There may be many ways to implement step S420, and the implementation ways of this step will be described in detail below with reference to multiple embodiments.
  • Embodiment 1 is an example in which the CORESET associated with the first search space is configured with pre-compensation-based SFN transmission, and the terminal detects the PDCCH and/or the PDSCH scheduled by the PDCCH in the first search space according to the type of the first search space. for explanation.
  • FIG. 5 to FIG. 7 respectively present three possible implementation manners of step S420.
  • step S522 if the type of the first search space is CSS, the terminal can perform PDCCH and/or PDCCH scheduling in the first search space according to all QCL parameters in the two TCI states where CORESET is activated Detection of PDSCH.
  • the QCL parameters of the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay, delay extension ⁇ . Therefore, the two TCI states include 8 parameters in total. If the type of the first search space is CSS, the eight parameters can be used for detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH. For example, the eight parameters can all be used for channel estimation of a demodulation reference signal (demodulation reference signal, DMRS) of the PDCCH and/or the PDSCH.
  • demodulation reference signal demodulation reference signal
  • step S524 if the type of the first search space is USS, the terminal can detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states, and the two TCI states Some QCL parameters in a TCI state are not used for this assay. In other words, only part of the QCL parameters in one of the two TCI states can be used for the detection.
  • the TCI state can be, for example, the second TCI state of two TCI states.
  • the QCL parameters in the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay , delayed expansion ⁇ .
  • the four QCL parameters in the first TCI state among the two TCI states can be used to detect the PDCCH and/or the PDSCH scheduled by the PDCCH in the first search space.
  • the four parameters can all be used for DMRS channel estimation of the PDCCH and/or the PDSCH.
  • the ⁇ average delay, delay spread ⁇ in the QCL parameters in the second TCI state of the two TCI states can be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH, while the second The ⁇ Doppler frequency shift, Doppler spread ⁇ among the QCL parameters in the TCI state cannot be used for the detection of the PDCCH and/or the PDSCH.
  • step S622 if the type of the first search space is CSS, the terminal may detect the PDCCH and/or the PDSCH scheduled by the PDCCH in the first search space according to one of the two TCI states.
  • the one TCI state may be: a TCI state in which the QCL type of the two TCI states is Type A; a TCI state in which all QCL parameters are available in the two TCI states; or, the first TCI state in the two TCI states.
  • the QCL types of the two TCI states are both QCL-TypeA, wherein all QCL parameters in the first TCI state are available, and some QCL parameters in the second TCI state are available.
  • the terminal may use the first TCI state in which all QCL parameters are available to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • step S624 if the type of the first search space is USS, the terminal can detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states, and the two TCI states Some QCL parameters in a TCI state are not used for this assay.
  • the implementation of step S624 is similar to that of step S524, and reference may be made to the relevant description of step S524, which will not be described in detail here.
  • the implementations corresponding to Figure 5 and Figure 6 can be used not only for the detection of PDCCH in the first search space, but also for the detection of PDSCH scheduled by PDCCH in the first search space, and can also be used for the PDCCH in the first search space at the same time and detection of PDSCH scheduled by PDCCH.
  • different detection methods may be used for the PDSCH. The implementation manner is illustrated below with reference to FIG. 7 .
  • step S722 if the type of the first search space is CSS, and the PDSCH is configured with SFN transmission, the terminal detects the PDSCH according to all QCL parameters in the two TCI states.
  • the QCL parameters of the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay, delay when extended ⁇ . Therefore, the two TCI states include 8 parameters in total.
  • the eight parameters can be used to detect the PDSCH. For example, the eight parameters can all be used for DMRS channel estimation of the PDSCH.
  • the terminal detects the PDSCH according to one of the two TCI states.
  • the one TCI state may be: a TCI state in which the QCL type of the two TCI states is Type A; a TCI state in which all QCL parameters are available in the two TCI states; or, the first TCI state in the two TCI states.
  • the QCL parameters in the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay , delayed expansion ⁇ .
  • the 4 parameters of the first TCI state are available, and only 2 parameters of the second TCI state are available. If the type of the first search space is CSS, and the PDSCH is not configured for SFN transmission, then four QCL parameters in the first TCI state of the two TCI states can be used to detect the PDSCH. For example, the 4 QCL parameters in the first TCI state of the two TCI states are used to perform DMRS channel estimation of the PDSCH.
  • Embodiment 2 The CORESET associated with the first search space is configured with pre-compensation-based SFN transmission, and the terminal detects the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the search space associated with the CORESET As an example to illustrate.
  • FIG. 8 to FIG. 12 show five possible implementation manners of step S420 respectively.
  • step S822 if the types of all search spaces associated with the CORESET are CSS, the terminal can perform the first search according to all QCL parameters in the two TCI states (the two TCI states in which the CORESET is activated) Detection of PDCCH in space and/or PDSCH scheduled by PDCCH.
  • the QCL parameters of the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay, delay when extended ⁇ . Therefore, the two TCI states include 8 parameters in total. If the types of all search spaces associated with the CORESET are CSS, the eight parameters can be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH. For example, the eight parameters can all be used for DMRS channel estimation of the PDCCH and/or the PDSCH.
  • step S824 if the type of at least one search space associated with the CORESET is USS, the terminal can detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states, and the two Some of the QCL parameters of one of the TCI states are not used for the detection. In other words, only part of the QCL parameters in one of the two TCI states can be used for the detection.
  • the TCI state may be, for example, the second TCI state of the two TCI states.
  • the QCL parameters in the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay , delayed expansion ⁇ . If the type of at least one search space associated with CORESET is USS, then the 4 QCL parameters in the first TCI state of the two TCI states can be used for PDCCH and/or PDSCH scheduled by PDCCH in the first search space detection. For example, the four parameters can all be used for DMRS channel estimation of the PDCCH and/or the PDSCH.
  • the ⁇ average delay, delay spread ⁇ in the QCL parameters in the second TCI state of the two TCI states can be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH, while the second The ⁇ Doppler frequency shift, Doppler spread ⁇ among the QCL parameters in the TCI state cannot be used for the detection of the PDCCH and/or the PDSCH.
  • step S922 if all the search spaces associated with the CORESET are of CSS type, the terminal can perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to one of the two TCI states. detection.
  • the one TCI state may be: a TCI state in which the QCL type of the two TCI states is Type A; a TCI state in which all QCL parameters are available in the two TCI states; or, the first TCI state in the two TCI states.
  • the QCL types of the two TCI states are both QCL-TypeA, wherein all QCL parameters in the first TCI state are available, and some QCL parameters in the second TCI state are available.
  • the terminal may use the first TCI state in which all QCL parameters are available to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • step S924 if the type of at least one search space associated with the CORESET is USS, the terminal can detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states, and the two Some of the QCL parameters of one of the TCI states are not used for the detection.
  • the implementation of step S924 is similar to that of step S824, and reference may be made to the relevant description of step S824, which will not be described in detail here.
  • step S1022 if the type of at least one search space associated with CORESET is CSS, the terminal can perform PDCCH in the first search space and/or PDSCH scheduled by PDCCH according to all QCL parameters in the two TCI states detection.
  • the QCL parameters of the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay, delay when extended ⁇ . Therefore, the two TCI states include 8 parameters in total. If the type of at least one search space associated with the CORESET is CSS, the eight parameters can all be used for detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH. For example, the eight parameters can all be used for DMRS channel estimation of the PDCCH and/or the PDSCH.
  • step S1024 if all the search spaces associated with the CORESET are of the USS type, the terminal can detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states, and the two Some of the QCL parameters of one of the TCI states are not used for the detection. In other words, only part of the QCL parameters in one of the two TCI states can be used for the detection.
  • the TCI state may be, for example, the second TCI state of the two TCI states.
  • the QCL parameters in the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay , delayed expansion ⁇ . If the types of all search spaces associated with CORESET are USS, then the 4 QCL parameters in the first TCI state of the two TCI states can be used for PDCCH and/or PDSCH scheduled by PDCCH in the first search space detection. For example, the four parameters can all be used for DMRS channel estimation of the PDCCH and/or the PDSCH.
  • the ⁇ average delay, delay spread ⁇ in the QCL parameters in the second TCI state of the two TCI states can be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH, while the second The QCL parameters ⁇ Doppler shift, Doppler spread ⁇ in the TCI state cannot be used for the detection of the PDCCH and/or the PDSCH.
  • step S1122 if the type of at least one search space associated with the CORESET is CSS, the terminal can perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to one of the two TCI states detection.
  • the one TCI state may be: a TCI state in which the QCL type of the two TCI states is Type A; a TCI state in which all QCL parameters are available in the two TCI states; or, the first TCI state in the two TCI states.
  • the QCL types of the two TCI states are both QCL-TypeA, wherein all QCL parameters in the first TCI state are available, and some QCL parameters in the second TCI state are available.
  • the terminal may use the first TCI state in which all QCL parameters are available to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • step S1124 if the type of all search spaces associated with the CORESET is USS, the terminal can detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states, and the two Some of the QCL parameters of one of the TCI states are not used for the detection.
  • the implementation of step S1124 is similar to that of step S1024, and reference may be made to the relevant description of step S1024, which will not be described in detail here.
  • implementations corresponding to FIG. 8 and FIG. 11 can be used not only for the detection of the PDCCH in the first search space, but also for the detection of the PDSCH scheduled by the PDCCH in the first search space, and can also be used for the first search space at the same time. Detection of PDCCH and PDSCH scheduled by PDCCH in the search space.
  • the PDSCH scheduled by the PDCCH in the first search space is configured with SFN transmission
  • different detection methods may be used for the PDSCH. The implementation manner will be illustrated below with reference to FIG. 12 .
  • step S1222 if the type of all search spaces associated with CORESET is CSS or the type of at least one search space associated with CORESET is CSS, and the PDSCH is configured with SFN transmission, the terminal according to the two TCI states All QCL parameters for PDSCH detection.
  • the QCL parameters of the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay, delay when extended ⁇ . Therefore, the two TCI states include a total of 8 parameters.
  • the eight parameters can be used to detect the PDSCH.
  • the eight parameters can all be used for DMRS channel estimation of the PDSCH.
  • step S1224 if the type of all search spaces associated with CORESET is CSS or the type of at least one search space associated with CORESET is CSS, and PDSCH is not configured for SFN transmission, the terminal performs PDSCH according to one of the two TCI states detection.
  • the one TCI state may be: a TCI state in which the QCL type of the two TCI states is Type A; a TCI state in which all QCL parameters are available in the two TCI states; or, the first TCI state in the two TCI states.
  • the QCL parameters in the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay , delayed expansion ⁇ . If all the search spaces associated with the CORESET are of type CSS or at least one of the search spaces associated with the CORESET is of type CSS, and the PDSCH is not configured for SFN transmission, then 4 of the first TCI state of the two TCI states All QCL parameters can be used to detect the PDSCH. For example, the four parameters can all be used for DMRS channel estimation of the PDSCH.
  • the third embodiment is that the CORESET associated with the first search space is configured with SFN transmission not based on pre-compensation, and the terminal detects the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the first search space. example to illustrate.
  • the implementation manner of the third embodiment is illustrated below with reference to FIG. 13 .
  • the terminal performs the PDCCH in the first search space and/or the Detection of PDSCH scheduled by PDCCH.
  • the one TCI state may be: a TCI state in which the QCL type in the two TCI states is Type A or the first TCI state in the two TCI states.
  • the QCL types of the two TCI states are QCL-TypeA and QCL-TypeB.
  • the terminal may use the TCI state of type QCL-TypeA to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • step S1324 if the type of the first search space is USS, the terminal performs PDCCH and/or PDCCH scheduling in the first search space based on all QCL parameters in the two TCI states detection of PDSCH.
  • the QCL parameters of the two TCI states include the following four parameters: ⁇ Doppler frequency shift, Doppler spread, average delay, delay when extended ⁇ . Therefore, the two TCI states include 8 parameters in total.
  • the eight parameters can be used for detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH. For example, the eight parameters can all be used for DMRS channel estimation of the PDCCH and/or the PDSCH.
  • Embodiment 4 The CORESET associated with the first search space is configured with SFN transmission not based on pre-compensation, and the terminal performs PDCCH and/or PDCCH scheduled PDSCH in the first search space according to the type of search space associated with the CORESET detection as an example.
  • FIG. 14 to FIG. 15 show two possible implementation manners of step S420 respectively.
  • step S1422 if all the search spaces associated with the CORESET are of CSS type, the terminal can perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to one of the two TCI states detection.
  • the one TCI state may be a TCI state whose QCL type is Type A among the two TCI states.
  • the one TCI state may be the first TCI state among the two TCIs.
  • the QCL types of the two TCI states are QCL-TypeA and QCL-TypeB respectively.
  • the terminal may use the TCI state whose QCL type is QCL-TypeA to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the terminal may detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states. All QCL parameters in the two TCI states are available for this assay.
  • step S1522 if the type of at least one search space associated with the CORESET is CSS, the terminal can perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to one of the two TCI states detection.
  • the one TCI state may be a TCI state whose QCL type is Type A among the two TCI states.
  • the one TCI state may be the first TCI state among the two TCIs.
  • the QCL types of the two TCI states are QCL-TypeA and QCL-TypeB respectively.
  • the terminal may use the TCI state whose QCL type is QCL-TypeA to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • step S1524 if all search spaces associated with the CORESET are of the USS type, the terminal may detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states. All QCL parameters for the two TCI states were available for this assay.
  • Embodiment 5 describes the downlink transmission method provided by the embodiment of the present application from the network side (the perspective of network equipment). It should be understood that the interaction between the terminal and the network device and related features and functions described on the network side correspond to the description on the terminal side, and repeated descriptions are appropriately omitted for brevity.
  • the network device sends the configuration of the first search space.
  • the CORESET associated with the first search space has two TCI states activated, indicating that the CORESET is configured for SFN-based transmission.
  • the network device can simultaneously transmit the CORESET to the terminal through two TRPs.
  • the data transmitted on the two TRPs may be completely the same.
  • the CORESET can be configured with SFN transmission based on pre-compensation, or can be configured with SFN transmission not based on pre-compensation.
  • the network device may send RRC signaling to the terminal.
  • RRC signaling can be used to configure CORESET to perform SFN transmission based on precompensation, or to configure CORESET to perform SFN transmission not based on precompensation.
  • the network device can simultaneously transmit the CORESET to the terminal through two TRPs.
  • the data transmitted on the two TRPs can be exactly the same, but the signal transmitted on one of the TRPs passes through the Doppler Doppler precompensation, while the signal transmitted on the other TRP is not Doppler precompensated.
  • the network device can simultaneously transmit the CORESET to the terminal through two TRPs.
  • the data transmitted by the two TRPs can be completely the same, and the signals of the two TRPs have not been Doppler pre-prepared. compensation, or the signals of both TRPs undergo the same Doppler precompensation.
  • step S1620 the network device performs PDCCH and/or PDCCH scheduling in the first search space according to the type of the first search space or the type of the search space associated with the CORESET (CORESET associated with the first search space) Transmission of PDSCH.
  • the network device may perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH based on at least one of the two TCI states according to the type of the first search space or the type of the search space associated with the CORESET If the type of the first search space or the type of the search space associated with the CORESET is different, the transmission modes of the PDCCH and/or the PDSCH scheduled by the PDCCH in the first search space are different.
  • the network device may transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the first search space. For example, if the type of the first search space is CSS, the first transmission method may be used to detect the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH; if the type of the first search space is USS, the detection may be performed using The second transmission scheme different from the first transmission scheme performs detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the network device may also transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the search space associated with the CORESET. For example, if at least one search space associated with the CORESET is CSS or all the search spaces associated with the CORESET are CSS, the first transmission method may be used to transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH; if the CORESET At least one associated search space is USS or all search spaces associated with CORESET are USS, then a second transmission method different from the first transmission method can be used to transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH .
  • the network device may transmit the PDCCH in the first search space according to the type of the first search space or the type of the search space associated with the CORESET, or may perform the first search space according to the type of the first search space or the type of the search space associated with the CORESET.
  • the transmission of the PDCCH in the first search space and the PDSCH scheduled by the PDCCH may also be performed simultaneously according to the type of the first search space or the type of the search space associated with the CORESET.
  • the PDCCH used to schedule the PDSCH
  • the scheduling interval between the PDSCH and the PDSCH is greater than the threshold value reported by the terminal may not include the TCI status indication field.
  • the format of the DCI carried by the PDCCH may be format 1_0.
  • the format of the DCI carried by the PDCCH is DCI format 1_1 and 1_2, and the RRC parameter tci-PresentInDCI is configured as disabled.
  • the network device transmits the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the type of the first search space or the type of the search space associated with the CORESET. Therefore, the network device can select an appropriate transmission mode for the PDCCH and/or the PDSCH scheduled by the PDCCH for different types of search spaces.
  • the CORESET associated with the first search space is configured with pre-compensation-based SFN transmission
  • step S1620 may include: if the type of the first search space is CSS, the network device adopts a non-pre-compensation-based SFN transmission The transmission of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in the SFN mode; if the type of the first search space is USS, the network device uses the SFN mode based on pre-compensation to perform the PDCCH in the first search space And/or the transmission of the PDSCH scheduled by the PDCCH.
  • the network device may transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in two TRPs, and the signals of the two TRPs (PDCCH signal and/or PDSCH signals) have not undergone Doppler pre-compensation, or have undergone the same Doppler pre-compensation.
  • the signals of the two TRPs (PDCCH signal and/or PDSCH signals) have not undergone Doppler pre-compensation, or have undergone the same Doppler pre-compensation.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in two TRPs, and the signal of one TRP in the two TRPs (PDCCH signal and (or PDSCH signal) has undergone Doppler pre-compensation, and the signal of another TRP has not been Doppler pre-compensated.
  • the signal of one TRP in the two TRPs (PDCCH signal and (or PDSCH signal) has undergone Doppler pre-compensation, and the signal of another TRP has not been Doppler pre-compensated.
  • the CORESET associated with the first search space is configured with pre-compensation-based SFN transmission
  • step S1620 may include: if the type of the first search space is CSS, the network device does not use SFN to transmit The transmission of the PDSCH scheduled by the PDCCH and/or PDCCH in the first search space; if the type of the first search space is USS, the network device uses the pre-compensated SFN method to perform the PDCCH and/or PDCCH in the first search space Transmission of the scheduled PDSCH. For example, if the type of the first search space is CSS, the network device may transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH on a single TRP.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in two TRPs, and the signal of one TRP in the two TRPs (PDCCH signal and (or PDSCH signal) has undergone Doppler pre-compensation, and the signal of another TRP has not been Doppler pre-compensated.
  • the signal of one TRP in the two TRPs (PDCCH signal and (or PDSCH signal) has undergone Doppler pre-compensation, and the signal of another TRP has not been Doppler pre-compensated.
  • the CORESET associated with the first search space is configured with SFN transmission not based on pre-compensation
  • step S1620 may include: if the type of the first search space is CSS, the network device does not use the SFN method Perform the transmission of the PDCCH and/or PDSCH scheduled by the PDCCH in the first search space; if the type of the first search space is USS, the network device uses the SFN method not based on pre-compensation to perform the PDCCH and/or the PDCCH in the first search space Or the transmission of the PDSCH scheduled by the PDCCH.
  • the network device may transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH on a single TRP.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in two TRPs, and the signals of the two TRPs (PDCCH signal and/or PDSCH signal ) without Doppler precompensation, or with the same Doppler precompensation.
  • the CORESET associated with the first search space is configured with pre-compensation-based SFN transmission
  • step S1620 may include: if the types of all search spaces associated with the CORESET are CSS, the network device adopts different The transmission of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH is performed based on the pre-compensated SFN method; if the type of at least one search space associated with the CORESET is USS, the network device uses the pre-compensated SFN method, Perform transmission of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in the two TRPs, and the signals of the two TRPs (PDCCH signals and/or PDSCH signals) have not undergone Doppler pre-compensation, or have undergone the same Doppler pre-compensation.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in the two TRPs, and the signal of one of the two TRPs (PDCCH signal and/or PDSCH signal) undergoes Doppler pre-compensation, and the signal of another TRP is not Doppler pre-compensated.
  • the signal of one of the two TRPs (PDCCH signal and/or PDSCH signal) undergoes Doppler pre-compensation, and the signal of another TRP is not Doppler pre-compensated.
  • the CORESET associated with the first search space is configured with pre-compensation-based SFN transmission
  • step S1620 may include: if the type of at least one search space associated with the CORESET is CSS, the network device adopts a different The transmission of the PDCCH and/or the PDSCH scheduled by the PDCCH in the first search space based on the pre-compensated SFN method; if the type of all search spaces associated with the CORESET is USS, the network device adopts the pre-compensated SFN method, Perform transmission of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in the two TRPs, and the signals of the two TRPs (PDCCH signals and/or PDSCH signals) have not undergone Doppler pre-compensation, or have undergone the same Doppler pre-compensation.
  • the signals of the two TRPs (PDCCH signals and/or PDSCH signals) have not undergone Doppler pre-compensation, or have undergone the same Doppler pre-compensation.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in the two TRPs, and the signal of one of the two TRPs (PDCCH signal and/or PDSCH signal) undergoes Doppler pre-compensation, and the signal of another TRP is not Doppler pre-compensated.
  • the signal of one of the two TRPs (PDCCH signal and/or PDSCH signal) undergoes Doppler pre-compensation, and the signal of another TRP is not Doppler pre-compensated.
  • the CORESET associated with the first search space is configured with SFN transmission not based on pre-compensation
  • step S1620 may include: if the types of all search spaces associated with the CORESET are CSS, the network device does not Use the SFN method to transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH; if the type of at least one search space associated with the CORESET is USS, the network device uses the SFN method that is not based on pre-compensation to perform the second Transmission of PDCCH and/or PDSCH scheduled by PDCCH in a search space.
  • the network device may transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH on a single TRP.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in two TRPs, and the signals of the two TRPs (PDCCH signal and/or PDSCH signal ) without Doppler precompensation, or with the same Doppler precompensation.
  • the CORESET associated with the first search space is configured with SFN transmission not based on pre-compensation
  • step S1620 may include: if at least one search space associated with the CORESET is CSS, the network device does not Use the SFN method to transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH; if the type of all the search spaces associated with the CORESET is USS, the network device uses the SFN method that is not based on pre-compensation to perform the second search space. Transmission of PDCCH and/or PDSCH scheduled by PDCCH in a search space.
  • the network device may transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH on a single TRP.
  • the network device can transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in two TRPs, and the signals of the two TRPs (PDCCH signal and/or PDSCH signal ) without Doppler precompensation, or with the same Doppler precompensation.
  • FIG. 17 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • the terminal 1700 in FIG. 17 includes a communication unit 1710 and a detection unit 1720 .
  • the communication unit 1710 may be configured to receive the configuration of the first search space, and the CORESET associated with the first search space has two TCI states activated.
  • the detection unit 1720 may be configured to perform PDCCH and TCI in the first search space based on at least one TCI state in the two TCI states according to the type of the first search space or the type of the search space associated with the CORESET. /or detection of the PDSCH scheduled by the PDCCH.
  • the detection unit 1720 is configured to, if the type of the first search space is CSS, perform the PDCCH in the first search space and/or all QCL parameters in the two TCI states.
  • the detection of the PDSCH scheduled by the PDCCH is described above.
  • the detection unit 1720 is configured to, if the type of the first search space is CSS, perform the PDCCH in the first search space and/or the The detection of the PDSCH scheduled by the PDCCH is described above.
  • the detecting unit 1720 is configured to perform the detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH according to the two TCI states if the type of the first search space is USS detection, wherein some of the QCL parameters of one of the two TCI states are not used for the detection.
  • the detection unit 1720 is configured to, if the type of the first search space is USS, perform the PDCCH in the first search space and/or the Detection of PDSCH scheduled by PDCCH.
  • the detection unit 1720 is configured to if at least one search space associated with the CORESET is CSS, or all search spaces associated with the CORESET are CSS, according to all QCL parameters in the two TCI states, Perform detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the detection unit 1720 is configured to: if at least one search space associated with the CORESET is CSS, or all search spaces associated with the CORESET are CSS, according to one of the two TCI states, Perform detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the detection unit 1720 is configured to perform the first search according to the two TCI states if at least one search space associated with the CORESET is USS, or all search spaces associated with the CORESET are USS.
  • some QCL parameters of the second TCI state in the two TCI states are not used for the detection.
  • the detecting unit 1720 is configured to, if at least one search space associated with the CORESET is USS, or all the search spaces associated with the CORESET are USS, perform an operation according to all QCL parameters in the two TCI states Detection of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the detection unit 1720 is configured to, if the type of the first search space is CSS, and the PDSCH is configured with SFN transmission, perform the PDSCH according to all QCL parameters in the two TCI states Detection: if the type of the first search space is CSS, and the PDSCH is not configured for SFN transmission, perform the detection of the PDSCH according to one of the two TCI states.
  • the detection unit 1720 is configured to if at least one search space associated with the CORESET is USS, or all search spaces associated with the CORESET are USS, and the PDSCH is configured with SFN transmission, according to the All QCL parameters in the two TCI states are used to detect the PDSCH; if at least one search space associated with the CORESET is USS, or all search spaces associated with the CORESET are USS, and the PDSCH is not configured with SFN transmission, performing detection of the PDSCH according to one of the two TCI states.
  • the CORESET associated with the first search space is configured with precompensation-based SFN transmission.
  • the CORESET associated with the first search space is configured with SFN transmission not based on precompensation.
  • the one TCI state is: the TCI state in which the QCL type in the two TCI states is type A; the TCI state in which all QCL parameters in the two TCI states are available; or the two TCI states The first TCI state in .
  • the communication unit 1710 is also configured to receive RRC signaling sent by the network device, the RRC signaling is used to configure the CORESET to perform SFN transmission based on pre-compensation, or to configure the CORESET to perform SFN transmission not based on pre-compensation SFN transmission.
  • the PDCCH does not include a TCI state indication field, and the scheduling interval between the PDCCH and the PDSCH is greater than the threshold value reported by the terminal.
  • FIG. 18 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network device 1800 in FIG. 18 includes a communication unit 1810 .
  • the communication unit 1810 is used to send the configuration of the first search space, and the CORESET associated with the first search space has been activated with two TCI states; according to the type of the first search space or the type of the search space associated with the CORESET, Perform transmission of the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH.
  • the communication unit 1810 is configured to, if the type of the first search space is CSS, perform the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in a manner not based on pre-compensation SFN transmission.
  • the communication unit 1810 is configured to transmit the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH on a single TRP if the type of the first search space is CSS.
  • the communication unit 1810 is configured to, if the type of the first search space is USS, implement the PDCCH in the first search space and/or the PDSCH scheduled by the PDCCH in a manner based on pre-compensation SFN transmission.
  • the communication unit 1810 is configured to transmit the PDCCH and/or the PDSCH scheduled by the PDCCH in a manner not based on pre-compensation SFN if the type of the first search space is USS.
  • the communication unit 1810 is configured to perform the first search in a manner not based on pre-compensation SFN if at least one search space associated with the CORESET is CSS, or all search spaces associated with the CORESET are CSS
  • the PDCCH in the space and/or the transmission of the PDSCH scheduled by the PDCCH.
  • the communication unit 1810 is configured to, if at least one search space associated with the CORESET is CSS, or all search spaces associated with the CORESET are CSS, perform the PDCCH and PDCCH in the first search space on a single TRP. /or the transmission of the PDSCH scheduled by the PDCCH.
  • the communication unit 1810 is configured to, if at least one search space associated with the CORESET is USS, or all search spaces associated with the CORESET are USS, perform the first search in a manner based on pre-compensation SFN
  • the PDCCH in the space and/or the transmission of the PDSCH scheduled by the PDCCH are configured to, if at least one search space associated with the CORESET is USS, or all search spaces associated with the CORESET are USS, perform the first search in a manner based on pre-compensation SFN The PDCCH in the space and/or the transmission of the PDSCH scheduled by the PDCCH.
  • the communication unit 1810 is configured to, if at least one search space associated with the CORESET is USS, or all search spaces associated with the CORESET are USS, perform the PDCCH and/or Or the transmission of the PDSCH scheduled by the PDCCH.
  • the CORESET associated with the first search space is configured with precompensation-based SFN transmission.
  • the CORESET associated with the first search space is configured with SFN transmission not based on precompensation.
  • the communication unit 1810 is further configured to send RRC signaling to the terminal, where the RRC signaling is used to configure the CORESET to perform SFN transmission based on pre-compensation, or to configure the CORESET to perform SFN not based on pre-compensation transmission.
  • the PDCCH does not include a TCI state indication field, and the scheduling interval between the PDCCH and the PDSCH is greater than the threshold value reported by the terminal.
  • FIG. 19 is a schematic structural diagram of an apparatus for downlink transmission according to an embodiment of the present application.
  • the dashed line in Figure 19 indicates that the unit or module is optional.
  • the apparatus 1900 may be used to implement the methods described in the foregoing method embodiments.
  • Apparatus 1900 may be a chip, a terminal or a network device.
  • Apparatus 1900 may include one or more processors 1910 .
  • the processor 1910 can support the device 1900 to implement the methods described in the foregoing method embodiments.
  • the processor 1910 may be a general purpose processor or a special purpose processor.
  • the processor may be a central processing unit (central processing unit, CPU).
  • the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • Apparatus 1900 may also include one or more memories 1920 .
  • a program is stored in the memory 1920, and the program can be executed by the processor 1910, so that the processor 1910 executes the methods described in the foregoing method embodiments.
  • the memory 1920 can be independent from the processor 1910 or can be integrated in the processor 1910 .
  • Apparatus 1900 may also include a transceiver 1930 .
  • the processor 1910 can communicate with other devices or chips through the transceiver 1930 .
  • the processor 1910 may send and receive data with other devices or chips through the transceiver 1930 .
  • the embodiment of the present application also provides a computer-readable storage medium for storing programs.
  • the computer-readable storage medium can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes programs.
  • the computer program product can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.

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

Abstract

L'invention concerne un procédé de transmission de liaison descendante, un terminal et un dispositif terminal. Le procédé comprend les étapes suivantes: un terminal reçoit la configuration d'un premier espace de recherche, dans lequel deux états d'indication de configuration de transmission TCI sont activés pour un ensemble de ressources de commande CORESET qui est associé au premier espace de recherche; et en fonction du type du premier espace de recherche ou du type d'espace de recherche qui est associé à l'ensemble CORESET et sur la base d'au moins un état d'indication TCI parmi les deux états d'indication TCI, la détection par le terminal, dans le premier espace de recherche, d'un canal PDCCH et/ou d'un canal PDSCH ordonnancé par le canal PDCCH. Pour différents types d'espaces de recherche, le terminal peut sélectionner un mode de détection approprié pour un canal PDCCH ou un canal PDSCH ordonnancé par le canal PDCCH, de sorte que les performances de détection d'un canal PDCCH et/ou d'un canal PDCCH dans un scénario de réseau à fréquence unique (SFN) peuvent être améliorées.
PCT/CN2021/101030 2021-06-18 2021-06-18 Procédé de transmission de liaison descendante, terminal et périphérique de réseau Ceased WO2022261964A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180095950.5A CN117044268A (zh) 2021-06-18 2021-06-18 下行传输方法、终端以及网络设备
PCT/CN2021/101030 WO2022261964A1 (fr) 2021-06-18 2021-06-18 Procédé de transmission de liaison descendante, terminal et périphérique de réseau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/101030 WO2022261964A1 (fr) 2021-06-18 2021-06-18 Procédé de transmission de liaison descendante, terminal et périphérique de réseau

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WO2022261964A1 true WO2022261964A1 (fr) 2022-12-22

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110475262A (zh) * 2018-05-11 2019-11-19 中国移动通信有限公司研究院 一种准共址信息的配置方法、网络设备及用户设备
CN111148242A (zh) * 2018-11-05 2020-05-12 华为技术有限公司 信息传输方法及装置
US20200221428A1 (en) * 2017-08-11 2020-07-09 Electronics And Telecommunications Research Institute Method for transmitting or receiving downlink control channel and device using same
CN112740603A (zh) * 2018-09-21 2021-04-30 三星电子株式会社 无线通信系统中考虑到优先级发送和接收物理层信道的方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200221428A1 (en) * 2017-08-11 2020-07-09 Electronics And Telecommunications Research Institute Method for transmitting or receiving downlink control channel and device using same
CN110475262A (zh) * 2018-05-11 2019-11-19 中国移动通信有限公司研究院 一种准共址信息的配置方法、网络设备及用户设备
CN112740603A (zh) * 2018-09-21 2021-04-30 三星电子株式会社 无线通信系统中考虑到优先级发送和接收物理层信道的方法和装置
CN111148242A (zh) * 2018-11-05 2020-05-12 华为技术有限公司 信息传输方法及装置

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