WO2021196119A1 - 数据传输的方法和装置 - Google Patents

数据传输的方法和装置 Download PDF

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Publication number
WO2021196119A1
WO2021196119A1 PCT/CN2020/082959 CN2020082959W WO2021196119A1 WO 2021196119 A1 WO2021196119 A1 WO 2021196119A1 CN 2020082959 W CN2020082959 W CN 2020082959W WO 2021196119 A1 WO2021196119 A1 WO 2021196119A1
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WIPO (PCT)
Prior art keywords
pdcch candidates
dci
positions
shared channel
physical shared
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
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PCT/CN2020/082959
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English (en)
French (fr)
Inventor
刘显达
胡丹
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN202080099371.3A priority Critical patent/CN115349289B/zh
Priority to PCT/CN2020/082959 priority patent/WO2021196119A1/zh
Priority to EP20929640.9A priority patent/EP4120763A4/en
Publication of WO2021196119A1 publication Critical patent/WO2021196119A1/zh
Priority to US17/937,280 priority patent/US20230031559A1/en
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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • 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 signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1642—Formats specially adapted for sequence numbers
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • This application relates to the field of communications, and in particular to a method and device for data transmission.
  • downlink control information passes through the physical downlink control channel (PDCCH) Bearer, the PDCCH candidate is used to specify the blind detection behavior of the terminal device.
  • the network device selects one PDCCH candidate from a plurality of PDCCH candidates to send DCI.
  • the terminal device does not know which PDCCH candidate the network device selected among multiple PDCCH candidates. Therefore, the terminal device needs to perform blind detection on multiple PDCCH candidates, that is, try PDCCH demodulation and decoding one by one until it can be found successfully PDCCH channel, until DCI is acquired.
  • a search space set (search space set, SSS) includes one or more PDCCH candidates, and the terminal device performs blind detection on the PDCCH candidates, which can also be understood as the terminal device performs blind detection in the SSS.
  • a control resource set is a set of physical resources configured by a network device to carry downlink control information (DCI).
  • DCI downlink control information
  • One SSS can be associated with at least two CORESETs, and different CORESETs can be configured with different TCI states.
  • the network device may send the information bits of the same DCI on the above at least two CORESETs, and the terminal device may combine the DCI obtained through the at least two CORESETs to obtain the final DCI. Since the detection timing is configured for the SSS, one SSS is associated with at least two CORESETs. The detection timings of the at least two CORESETs are the same, which limits the DCI sending time to the same, resulting in flexibility for network devices to issue DCIs Poor sex.
  • the present application provides a data transmission method and device, which is beneficial to improve the flexibility of the network device to issue DCI, thereby improving the data transmission efficiency.
  • a data transmission method including: a terminal device performs blind detection on at least two physical downlink control channel PDCCH candidates, at least two PDCCH candidates are respectively associated with different control resource sets CORESET, and at least two PDCCHs There is an association relationship between the candidates; the terminal device determines a downlink control information DCI according to the results of blind detection on at least two PDCCH candidates, and the DCI is used to schedule the physical shared channel; the terminal device receives or transmits the physical shared channel according to the DCI channel.
  • an alternative way for the aforementioned at least two PDCCH candidates to be respectively associated with different control resource sets CORESET is that the at least two PDCCH candidates may be respectively associated with at least two TCI states configured in the same CORESET.
  • the at least two PDCCH candidates belong to different SSSs, and the at least two PDCCH candidates are respectively associated with different CORESETs, so that there is an association.
  • At least two PDCCH candidates of the relationship can be received using different QCL hypotheses, and corresponding different SSSs can be independently configured with detection timing, which is beneficial to improve the flexibility of the network device to issue DCI, thereby improving data transmission efficiency.
  • the above-mentioned "there is an association relationship between PDCCH candidates” means that the terminal device needs to obtain one DCI signaling according to multiple PDCCH candidates with an association relationship, and the DCI signaling may be used to schedule at least one PUSCH or at least one PDSCH. It should be understood that the above-mentioned at least two PDCCH candidates belong to different SSSs.
  • the network device may send DCI on one or more of the at least two PDCCH candidates that have an association relationship; for the terminal device, the terminal device may send DCI on at least two PDCCH candidates that have an association relationship.
  • the information bits on the PDCCH candidates that have an association relationship also have an association relationship, and are used by the terminal device to determine a DCI.
  • the information bits on at least two PDCCH candidates each include all information bits of DCI; or, the information bits on at least two PDCCH candidates each include part of DCI information. Bits.
  • the information bits on the at least two PDCCH candidates respectively include all the information bits of the above one DCI.
  • the terminal device can receive information bits on at least two PDCCH candidates, respectively perform maximum likelihood detection and soft decision, and soft merge the two obtained soft information bits to obtain the final DCI.
  • This embodiment can improve the probability of correct detection during the soft combining process, thereby improving the reliability of DCI detection.
  • two pieces of DCI information are respectively transmitted through channels with lower correlation, which can increase the gain of the soft combining operation and is more robust. good.
  • the information bits on the aforementioned at least two PDCCH candidates respectively include part of the information bits of the aforementioned one DCI.
  • the part of the information bits here can be any part of the information bits of a DCI signaling.
  • the network equipment can carry the information bits of one DCI signaling on at least two CORESETs, and send signals carried on different CORESETs through different TRPs.
  • the terminal equipment can receive the information bits on at least two PDCCH candidates and execute them separately. Detect and obtain the final DCI based on at least two pieces of information obtained.
  • This embodiment can be understood that at least two PDCCH candidates with a smaller aggregation level (AL) can be aggregated to form a PDCCH candidate with a larger AL.
  • AL aggregation level
  • the DCI signaling in this embodiment has relatively low channel correlation during transmission and has diversity gain. Compared with the first possible implementation manner described above, the blind detection complexity of the terminal device is relatively low.
  • the above-mentioned process for the terminal device to obtain a DCI signaling through at least two PDCCH candidates may include multiple implementations.
  • the terminal device may decode first, and then combine the decoded information bits; the terminal device may also The detected information may be combined first, and then decoded to obtain the final information bits, which is not limited in the embodiment of the present application.
  • At least two PDCCH candidates have the same AL and the same number; or, at least two PDCCH candidates have different ALs and the same number.
  • the association relationship between at least two PDCCH candidates can essentially be understood as the association relationship between PDCCH candidates in different SSSs. For example, it may be configured or agreed that the PDCCH candidate of SSS 1 and the PDCCH candidate of SSS 2 have an association relationship. Further, one or more PDCCH candidates of SSS 1 and one or more PDCCH candidates of SSS 2 may be configured or agreed to have an association relationship.
  • At least two PDCCH candidates have the same AL and the same number. That is, it can be agreed in advance that PDCCH candidates with the same number under the same AL have an association relationship.
  • the numbering here is of the AL level, that is, PDCCH candidates are numbered in the same AL in the same SSS.
  • PDCCH candidates with different numbers in the same AL may include non-overlapping time-frequency resource units, for example, control channel elements (CCEs).
  • CCEs control channel elements
  • the information bits corresponding to the PDCCH candidates with the same number in the same AL can be soft merged or decoded information bit merged. It should be understood that, for PDCCH candidates that do not have an association relationship, they do not belong to the at least two PDCCH candidates described above, and the terminal device can independently perform blind detection operations, such as parsing, decoding, etc., on them.
  • the terminal device performs a soft merge operation on the PDCCH candidates under the same AL, which can reduce the processing complexity of the terminal device.
  • the association relationship between the PDCCH candidates can be one-to-one, or there are only some PDCCHs in different SSSs. There is an association relationship between the candidates, which can further reduce the processing complexity of the terminal device.
  • At least two PDCCH candidates have different ALs and the same number. That is, PDCCH candidates with the same number under a specific AL (predefined or configured) have an association relationship.
  • the above numbering is at the AL level, that is, PDCCH candidates are numbered in the same AL in the same SSS.
  • the above-mentioned different ALs may be pre-appointed or configured by network equipment.
  • the information bits corresponding to the PDCCH candidates with the same number under a specific AL (predefined or configured) can be soft merged or decoded information bit merged. It should be understood that, for PDCCH candidates that do not have an association relationship, they do not belong to the at least two PDCCH candidates described above, and the terminal device can independently perform blind detection operations, such as parsing, decoding, etc., on them.
  • PDCCH candidates with the same number under a specific AL have an association relationship, which can be divided into the following two cases: Case 1.
  • Case 1 There is a one-to-one relationship between AL and AL, that is, the PDCCH candidate of one AL is related to the other.
  • An AL PDCCH candidate has an association relationship. Since the channels of different TRPs are different, by configuring at least two PDCCH candidates with an association relationship to have different ALs, different TRPs can be configured to send DCI to different ALs according to channel conditions, which is more flexible.
  • the association between PDCCH candidates The relationship is one-to-one, which can further reduce the processing complexity of the terminal device.
  • One-to-many relationship between AL and AL that is, there is an association relationship between the PDCCH candidates of one AL and the PDCCH candidates of at least two ALs. Since the channels of different TRPs are different, by configuring at least two PDCCH candidates with an association relationship to have different ALs, different TRPs can be configured to send DCI to different ALs according to channel conditions, which improves the flexibility of the network device to issue DCI.
  • the above method further includes: the terminal device determines a reference position, the reference position is based on at least two At least one CORESET in the CORESET or at least one PDCCH candidate among the at least two PDCCH candidates is determined; the terminal device determines the starting position of the physical shared channel based on the reference position; the terminal device receives or transmits the physical shared channel according to the DCI, Including: the terminal device receives or transmits the physical shared channel based on the starting position of the physical shared channel.
  • the aforementioned reference position may be determined according to at least one SSS of at least two SSSs with an association relationship, or determined according to at least one PDCCH candidate of the at least two PDCCH candidates with an association relationship.
  • the network device and the terminal device may determine the above-mentioned reference position in a manner agreed by the agreement in accordance with an agreed rule, so as to determine the starting position of the physical shared channel.
  • the terminal device when the network device adopts the DCI format with the PDCCH detection timing start position as the reference position indicator S, the terminal device can determine the actual physical shared channel start position according to the agreed rule, and ensure that it is issued with the network device The actual starting positions of the physical shared channels are consistent, which helps to improve the efficiency of detection and reception of the physical shared channels.
  • the aforementioned reference position is a reference position determined according to one CORESET of the at least two CORESETs or one PDCCH candidate of the at least two PDCCH candidates. Therefore, the network device and the terminal device can determine the starting position of the physical shared channel based on this reference position.
  • the start symbol position of the detection timing of the SSS corresponding to the CORESET with the largest number or the smallest number among the at least two CORESETs is the aforementioned reference position.
  • the starting symbol position of the detection occasion of the SSS corresponding to the PDCCH candidate with the largest number or the smallest number among the at least two PDCCH candidates is the aforementioned reference position.
  • the starting symbol position of the detection timing of the SSS with the largest number or the smallest number among the at least two SSSs is the aforementioned reference position.
  • the starting symbol position of the detection timing of the SSS corresponding to the PDCCH candidate with the highest time domain position or the PDCCH candidate with the lowest time domain position among the at least two PDCCH candidates is the aforementioned reference position.
  • the terminal device determines the starting position of the physical shared channel based on the reference position, including: the terminal device determines the starting position of the physical shared channel based on the above-mentioned reference position and the first field in the DCI The starting position of the physical shared channel, the first field is used to indicate the offset of the starting position of the physical shared channel relative to the reference position.
  • the DCI is a simplified DCI format, and the terminal device only determines one reference position.
  • the protocol agrees to use the start position of a specific SSS detection opportunity as the reference position, and the network device can determine the first field and the physical field in the DCI issued in at least two associated SSSs according to the rule. The actual location of the shared channel.
  • the terminal device may determine a reference position according to the rule, and combine the reference position and the first field in the DCI obtained by blind detection to determine the starting position of the physical shared channel.
  • the above-mentioned reference positions are at least two reference positions determined according to the start symbol positions of the detection occasions corresponding to the at least two CORESETs or the at least two PDCCH candidates. Therefore, the network device and the terminal device can determine the starting position of the physical shared channel based on the at least two reference positions.
  • the terminal device determines the starting position of the physical shared channel based on the reference position, including: the terminal device determines the starting position of the physical shared channel based on the above-mentioned at least two reference positions and the first in the DCI Field to determine at least two starting positions, and the first field is used to indicate the offset of the at least two starting positions with respect to the at least two reference positions.
  • the DCI may be a simplified DCI format
  • the terminal device may determine at least two reference positions, that is, determine one reference position for each CORESET or each PDCCH candidate.
  • the network device may transmit the same original bits of DCI in at least two SSSs, and the terminal device may determine at least two reference positions according to the detection timing corresponding to the at least two SSSs, and the terminal device may determine the at least two reference positions according to the at least two SSSs.
  • at least two starting positions are determined, so that at least two physical shared channels are received or transmitted at the at least two starting positions.
  • the aforementioned at least two physical shared channels are at least two repeated transmissions of the same transmission block (TB), which means that the terminal device can combine the soft information received by the at least two physical shared channels. Thereby improving the transmission reliability of the physical shared channel.
  • the frequency domain resources occupied by the foregoing two repeated transmissions may be determined according to the indication of the same DCI signaling, that is, the frequency domain resources occupied by the two repeated transmissions are the same, or the second transmission may be pre-configured or predefined.
  • the frequency domain interval of the second repeated transmission relative to the first repeated transmission, so that the two repeated transmissions occupy different frequency domain resources, and the frequency diversity gain of the transmission is improved.
  • the QCL assumptions used in the foregoing two repeated transmissions are different.
  • An implementation manner is that the QCL assumptions used in the foregoing two repeated transmissions are respectively the same as the QCL assumptions used in the foregoing two CORESETs for scheduling the repeated transmissions.
  • the first field includes at least two second fields, and the at least two second fields have a corresponding relationship with at least two CORESETs or at least two PDCCH candidates.
  • the at least two second fields are respectively used to indicate the offset of the at least two starting positions relative to the at least two reference positions; the terminal device determines the at least two fields based on the at least two reference positions and the first field in the DCI
  • a starting position includes: the terminal device determines at least two starting positions based on the at least two reference positions and the at least two second fields.
  • the aforementioned at least two second fields are the at least two S values indicated by the first field.
  • the number of S values indicated by the first field is determined according to the number of CORESET (or SSS) with an association relationship.
  • the terminal device may determine the corresponding starting position according to the at least two reference positions and the corresponding at least two S values respectively.
  • multiple detection occasions can be determined based on multiple SSSs with association relationships, thereby determining multiple starting positions, thereby repeatedly transmitting multiple physical shared channels based on the multiple starting positions, and improving the performance of the physical shared channels. Transmission reliability.
  • the detection timings corresponding to the at least two PDCCH candidates have the same start symbol position, the same end symbol position, or the detection time completely overlaps.
  • the reliability and time delay of PDCCH detection are increased to ensure that the terminal The device learns the correct starting position of the physical shared channel, which improves the transmission efficiency of the physical shared channel.
  • another data transmission method including: a network device sends downlink control information DCI on at least two physical downlink control channel PDCCH candidates, the DCI is used to schedule the physical shared channel, and the at least two PDCCH candidates are respectively Associating different control resource sets CORESET, there is an association relationship between at least two PDCCH candidates; the network device sends or receives the physical shared channel according to the DCI.
  • the information bits on the at least two PDCCH candidates respectively include all the information bits of the DCI; or, the information bits on the at least two PDCCH candidates respectively include the information bits of the DCI. Part of the information bits.
  • At least two PDCCH candidates have the same aggregation level AL and the same number; or, at least two PDCCH candidates have different AL and the same number.
  • the above method before the network device sends the downlink control information DCI on at least two physical downlink control channel PDCCH candidates, the above method further includes: the network device determines a reference position, and the reference The position is determined according to at least one CORESET of at least two CORESETs or at least one PDCCH candidate among at least two PDCCH candidates; the network device determines the starting position of the physical shared channel based on the reference position; the network device sends according to the DCI Or receiving the physical shared channel includes: the network device sends or receives the physical shared channel based on the starting position.
  • the aforementioned reference position is a reference position determined according to one CORESET of the at least two CORESETs or one PDCCH candidate of the at least two PDCCH candidates.
  • the network device sends or receives the physical shared channel based on the starting position of the physical shared channel, including: the network device determines the first in the DCI based on the reference position Field and the starting position of the physical shared channel, the first field is used to indicate the offset of the starting position of the physical shared channel with respect to the reference position.
  • the above-mentioned reference positions are at least two reference positions determined according to the start symbol positions of the detection occasions corresponding to the at least two CORESETs or the at least two PDCCH candidates.
  • the network device sends or receives the physical shared channel based on the starting position of the physical shared channel, including: the network device determines the DCI in the DCI based on the at least two reference positions The first field of and at least two starting positions, where the first field is used to indicate the offset of the at least two starting positions with respect to the at least two reference positions.
  • the first field includes at least two second fields, and the at least two second fields have a corresponding relationship with at least two CORESETs or at least two PDCCH candidates.
  • the at least two second fields are respectively used to indicate the offset of the at least two starting positions relative to the at least two reference positions; the network device determines the first field and the at least two reference positions in the DCI based on the at least two reference positions.
  • a starting position includes: the network device determines the at least two fields and the at least two starting positions based on the at least two reference positions.
  • the detection timings corresponding to the at least two PDCCH candidates have the same start symbol position, the same end symbol position, or the detection time completely overlaps.
  • a data transmission device which is used to execute the method in any possible implementation manner of the foregoing aspects.
  • the device includes a unit for executing the method in any one of the possible implementation manners of the foregoing aspects.
  • a data transmission device including a processor, which is coupled to a memory and can be used to execute instructions in the memory to implement a method in any one of the possible implementation manners of the foregoing aspects.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the data transmission device is a terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the data transmission device is a chip configured in a terminal device.
  • the communication interface may be an input/output interface.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is used to receive signals through the input circuit and transmit signals through the output circuit, so that the processor executes the method in any one of the possible implementation manners of the foregoing aspects.
  • the above-mentioned processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output
  • the circuit can be the same circuit, which is used as an input circuit and an output circuit at different times.
  • the embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.
  • a processing device including a processor and a memory.
  • the processor is used to read instructions stored in the memory, and can receive signals through a receiver, and transmit signals through a transmitter, so as to execute the method in any one of the possible implementation manners of the foregoing aspects.
  • processors there are one or more processors, and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting mode of the memory and the processor.
  • ROM read only memory
  • sending instruction information may be a process of outputting instruction information from the processor
  • receiving capability information may be a process of receiving input capability information by the processor.
  • the processed output data may be output to the transmitter, and the input data received by the processor may come from the receiver.
  • the transmitter and receiver can be collectively referred to as a transceiver.
  • the processing device in the above sixth aspect may be a chip, and the processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated in the processor, may be located outside the processor, and exist independently.
  • a computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute any one of the above-mentioned aspects. In the method.
  • a computer program also called code, or instruction
  • a computer-readable storage medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes any of the above aspects.
  • a computer program also called code, or instruction
  • a communication system including the aforementioned terminal device and network device.
  • Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 shows a schematic diagram of the starting position of the PDSCH corresponding to the ordinary DCI format.
  • FIG. 3 shows a schematic diagram of the starting position of the PDSCH corresponding to the simplified DCI format.
  • Fig. 4 shows a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 5 shows a schematic diagram of an association relationship between PDCCH candidates according to an embodiment of the present application.
  • FIG. 6 shows a schematic diagram of another association relationship between PDCCH candidates in an embodiment of the present application.
  • FIG. 7 shows a schematic diagram of yet another association relationship between PDCCH candidates according to an embodiment of the present application.
  • FIG. 8 shows a schematic diagram of the starting position of the PDSCH in an embodiment of the present application.
  • FIG. 9 shows a schematic diagram of the starting position of another PDSCH according to an embodiment of the present application.
  • FIG. 10 shows a schematic diagram of another PDSCH starting position according to an embodiment of the present application.
  • FIG. 11 shows a schematic block diagram of a data transmission device according to an embodiment of the present application.
  • FIG. 12 shows a schematic block diagram of another data transmission device according to an embodiment of the present application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD LTE Time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • SCMA sparse code multiple access
  • OFDM orthogonal Frequency division multiplexing
  • FBMC filter bank multi-carrier
  • GFDM generalized frequency division multiplexing
  • filtered-OFDM filtered-OFDM, F-OFDM
  • Fig. 1 shows a schematic diagram of a communication system suitable for an embodiment of the present application.
  • the communication system 100 may include at least one network device, such as the network device 110 shown in FIG. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in FIG. 1.
  • the network device 110 and the terminal device 120 may communicate through a wireless link.
  • Each communication device, such as the network device 110 or the terminal device 120 may be configured with multiple antennas, and the multiple antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals.
  • each communication device additionally includes a transmitter chain and a receiver chain.
  • Those of ordinary skill in the art can understand that they can all include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, etc.). , Demodulator, demultiplexer or antenna, etc.). Therefore, the network device 110 and the terminal device 120 can communicate through multi-antenna technology.
  • the terminal equipment in the embodiments of this application may communicate with one or more core networks via a radio access network (RAN).
  • RAN radio access network
  • the terminal equipment may be referred to as an access terminal, user equipment (UE), Subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or terminals in the future evolved public land mobile network (PLMN) Equipment, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the network device in the embodiment of the application may be a device used to communicate with terminal devices.
  • the network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA)
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • the base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system.
  • NodeB, eNB or eNodeB it can also be a wireless controller in the cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, or a roadside station.
  • CRAN cloud radio access network
  • Wearable devices network devices in the future 5G network or network devices in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.
  • BBU baseband unit
  • DU distributed unit
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include a radio unit (RU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB.
  • CU implements radio resource control (RRC), packet data convergence protocol (PDCP) layer functions
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • DU implements wireless link.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • the network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.
  • the above-mentioned network equipment may also refer to a general term for all equipment on the network side.
  • the multiple TRPs may be collectively referred to as network equipment.
  • 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 hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application.
  • the execution subject 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 the network device that can call and execute the program.
  • computer-readable storage media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CDs), digital versatile 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.
  • the term "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.
  • the embodiments of this application can be applied to LTE systems, Internet of Vehicles, and subsequent evolutionary systems such as 5G, etc., or other wireless communication systems that use various wireless access technologies, such as code division multiple access, frequency division multiple access, and time division multiple access.
  • Orthogonal Frequency Division Multiple Access, Single Carrier Frequency Division Multiple Access and other access technology systems are especially suitable for scenarios that require channel information feedback and/or application of secondary precoding technology, such as wireless networks and applications using Massive MIMO technology Distributed antenna technology for wireless networks, etc.
  • MIMO multiple-input multiple-output
  • the antenna transmits and receives, thereby improving the communication quality. It can make full use of space resources and achieve multiple transmissions and multiple receptions through multiple antennas. Without increasing the spectrum resources and antenna transmission power, the system channel capacity can be doubled.
  • Control channel element (CCE)
  • CCE is the basic physical unit of PDCCH, that is, a PDCCH channel is composed of one or more CCEs.
  • a CCE may include 6 resource element groups (resource element groups, REG), where each REG may include 1 RB in the frequency domain, that is, 12 resource elements (RE), which may include One orthogonal frequency division multiplexing (OFDM) symbol.
  • REG resource element groups
  • REG resource element groups
  • REG resource element groups
  • REG resource element groups
  • REG resource element groups
  • REG resource element groups
  • REG resource element groups
  • REG resource elements
  • OFDM Orthogonal frequency division multiplexing
  • the physical resource occupied by a control resource set (CORESET) determines the number of CCEs included in the CORESET.
  • one CORESET occupies 24 RBs and 1 OFDM symbol.
  • the 24 RBs can be divided into 4 CCEs and numbered in a non-interleaved mapping manner.
  • Each CCE includes Six consecutive REGs; in another possible implementation manner, multiple non-contiguous REGs can be formed into one CCE according to an interleaved mapping manner.
  • CCE can be understood as a logical resource
  • REG can be understood as an actual resource.
  • the mapping from logical resources to actual resources can be interleaved or non-interleaved.
  • CORESET is a set of physical resources configured by a network device to carry downlink control information (DCI).
  • DCI downlink control information
  • a CORESET is a physical resource containing multiple CCEs or multiple REGs.
  • the number of resource blocks (resource blocks, RB) that can be occupied by a CORESET is an integer multiple of 6, and is configured in the form of a bitmap.
  • RB resource blocks
  • a CORESET can be configured to occupy 12 RBs;
  • one CORESET can occupy one or more consecutive OFDM symbols.
  • one CORESET can be configured to occupy one to three consecutive OFDM symbols.
  • CORESET is configured through high-level signaling.
  • a transmission configuration indicator TCI
  • TCI transmission configuration indicator
  • DMRS demodulation reference signal
  • scrambling sequence of DCI bits can also be configured in CORESET.
  • the terminal device can monitor one or more search space sets SSS to obtain the corresponding DCI.
  • the identification of each search space set is associated with an identification of CORESET, so that the terminal device can learn the physical resources occupied by each search space set.
  • SSS is used to specify the blind detection behavior of terminal equipment.
  • the meaning of DCI blind detection is: in the physical resource pool occupied by DCI (ie the corresponding SSS), receive DMRS on different resources according to certain rules, perform channel estimation, and perform signal detection according to different DCI formats and scrambling methods And decoding.
  • An SSS can include the following configuration information:
  • the SSS is associated with the CORESET, so that the terminal device can perform the blind detection of DCI on the physical resource corresponding to the associated CORESET according to the detection behavior defined by the SSS. It should be understood that one CORESET can be associated with multiple SSSs, and one SSS is associated with one CORESET.
  • the terminal device can determine the DCI detection time.
  • the terminal device can determine the time domain position according to the detection timing of SSS 1, determine the frequency domain position according to CORESET 1, and blindly detect SSS 1 at the determined time domain position and frequency domain position.
  • the detection period can be configured as 1 slot or N OFDM symbols.
  • the frequency domain resources occupied by one DCI include n consecutive CCEs, where n can be referred to as the AL corresponding to the DCI.
  • the value of AL is the number of CCEs included in one DCI
  • the candidate value of AL can be: ⁇ 1,2,4,8,16 ⁇ .
  • Different ALs can adapt to different channel conditions. For example, when the signal to interference plus noise ratio (SINR) of the channel is low, network equipment can use a larger AL to send DCI, thereby increasing transmission reliability. Conversely, network equipment can use a smaller AL to send DCI, thereby saving resource overhead.
  • SINR signal to interference plus noise ratio
  • the terminal device can determine the time-frequency position of the PDCCH according to the SSS and CORESET configuration.
  • the network device also needs to inform the terminal device how to sequentially detect the DCI that may be issued at the time-frequency position, that is, how to perform blind detection. Therefore, the network device needs to inform the terminal device of the physical resource size and location corresponding to each DCI blind detection by configuring the PDCCH candidate.
  • PDCCH candidates can be understood as the basic granularity of blind detection of DCI by terminal equipment.
  • a PDCCH candidate corresponds to a DCI detection or a DCI detection process (performs information bit analysis, decoding, decision and other operations).
  • the number of PDCCH candidates reflects the detection of terminal equipment.
  • Table 1 shows the correspondence between the subcarrier interval and the number of PDCCH candidates.
  • the network device may configure different PDCCH candidates according to different subcarrier intervals.
  • Subcarrier spacing (kHz) Maximum number of PDCCH candidates detected 15 44 30 36 60 twenty two 120 20
  • the terminal device can determine the number of physical resources occupied by the PDCCH candidates under the AL according to the value of the AL, and determine according to the index value of each PDCCH candidate under the AL, the associated CORESET ID, the number of CCEs included in the CORESET, etc. Physical resources occupied by each PDCCH candidate under AL.
  • the SSS may also include corresponding DCI format information, radio network tempory identity (RNTI) and other information, which are used to instruct the terminal device to detect and parse the DCI.
  • RNTI radio network tempory identity
  • TCI Transmission configuration indicator
  • a TCI state includes indication information of quasi co-location (quasi co-location, QCL) hypothesis, and the indication information is used to indicate that the reference signal (RS) and the DMRS of the PDCCH have the same QCL hypothesis.
  • QCL quasi co-location
  • the above-mentioned quasi co-location relationship can be one of the following types:
  • Quasi co-location type A includes: Doppler shift, Doppler spread, average delay, and delay spread.
  • Quasi-co-location type B includes: Doppler frequency shift, Doppler spread.
  • Quasi-co-location type C includes: average delay and delay extension.
  • the quasi co-location type D includes: spatial reception parameters (spatial Rx parameters).
  • each CORESET can independently configure a TCI state.
  • DCI format (DCI format)
  • 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, and so on.
  • the number of bits corresponding to DCI format 1_2 is less 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.
  • a simplified DCI format, such as the above DCI format 1_2, is described in detail below.
  • the bit number of most fields can be configured, for example, it can be configured as a field with a small number of bits
  • the field (SLIV field) indicating the time domain position of scheduling PDSCH in the DCI includes The following information: the slot position of the PDSCH (K 0 ); the length of the OFDM symbol occupied by the PDSCH (L); the starting position of the OFDM symbol occupied by the PDSCH in the corresponding slot (S).
  • a slot may include 7 OFDM symbols or 14 OFDM symbols, and the actual length of each OFDM symbol can be set according to requirements.
  • the value indicated by K 0 represents the deviation of the slot where the PDSCH is located relative to the slot where the DCI is located.
  • the shift amount, for example, K 0 0 means that PDSCH and DCI are located in the same slot.
  • the reference start position indicated by S in the SLIV field is the start boundary of the slot (also referred to as the start position of the slot).
  • the reference starting position indicated by the S in the SLIV field is the starting symbol of the corresponding PDCCH detection occasion, thereby helping to reduce the DCI overhead and increase the reliability of DCI transmission.
  • FIG. 2 An example of a common DCI format is shown in Figure 2.
  • the time domain position of the PDCCH can be determined according to the configuration information in the corresponding SSS (that is, the detection timing of the SSS).
  • the index value of the slot start OFDM symbol is 0, the index value of the start position of PDSCH is 6 , That is, the starting position of the PDSCH is the 7th OFDM symbol in the slot.
  • An example of a simplified DCI format is shown in Figure 3.
  • the value of S indicates that the start position of PDSCH reception is 4 away from the start position of the PDCCH detection occasion for scheduling the PDSCH OFDM symbols, assuming that the OFDM symbol index value corresponding to the start position of the PDCCH detection opportunity is 2, then the index value of the start position of the PDSCH is 6, that is, the start position of the PDSCH is the 7th OFDM symbol in the slot , PDCCH detection timing can be determined according to the configuration information of the corresponding SSS.
  • one SSS may include one or more PDCCH candidates, and the terminal device performs blind detection on the PDCCH candidates, which can also be understood as the terminal device performs blind detection in the SSS.
  • One SSS can be associated with one CORESET, that is, one or more PDCCH candidates can be associated with one CORESET.
  • the network equipment can send different DCIs through different CORESETs, and the terminal equipment can independently perform blind detection on the PDCCH candidates associated with the CORESET to obtain the DCIs corresponding to the respective CORESETs.
  • the DCI obtained by the above-mentioned terminal equipment through different CORESETs is independent and not related to each other.
  • the information bits of the same DCI can be repeatedly transmitted on multiple physical resources (such as CORESET), and the terminal device can blindly detect DCI on the multiple physical resources. , And combine the obtained information bits to improve the reliability of information detection.
  • one SSS can be associated with at least two CORESETs, and different CORESETs can be configured with different TCI states.
  • the network device may repeatedly issue the DCI on the at least two CORESETs, and the terminal device may merge the DCI obtained through the at least two CORESETs to obtain the final DCI.
  • the detection timing is configured for the SSS, one SSS is associated with at least two CORESETs.
  • the detection timings of the at least two CORESETs are the same, which limits the transmission time of repeated DCIs to the same time, resulting in network equipment
  • the flexibility of issuing DCI is poor.
  • the embodiments of the present application provide a data transmission method and device, which is beneficial to improve the flexibility of the network device to issue DCI, thereby improving the data transmission efficiency.
  • pre-definition can be implemented by pre-saving corresponding codes, tables, or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). There is no limitation on its specific implementation.
  • control resource set CORESET
  • SSS search space set
  • PDCCH candidate candidiate
  • the first, second, and various numerical numbers are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish different fields, distinguish different information, and so on.
  • the “protocols” involved in the embodiments of the present application may refer to standard protocols in the communication field, for example, may include LTE protocol, NR protocol, and related protocols applied to future communication systems, which are not limited in this application.
  • At least one refers to one or more, and “at least two” and “multiple” refer to two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one item (a) or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • At least one of a, b, and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.
  • the technical solution of the present application can be applied to a wireless communication system, for example, the communication system 100 shown in FIG. 1.
  • a wireless communication connection relationship between two communication devices in the wireless communication system and one of the two communication devices may correspond to the terminal device 120 shown in FIG. 1, for example, it may be as shown in FIG.
  • the terminal device shown may also be a chip configured in the terminal device; the other communication device of the two communication devices may correspond to the network device 110 shown in FIG. 1, for example, it may be the chip shown in FIG.
  • the network device may also be a chip configured in the network device.
  • FIG. 4 shows a schematic flowchart of a data transmission method 400 provided by an embodiment of the present application. This method can be applied to the communication system shown in FIG. 1, but the embodiment of the present application does not limit this.
  • the method 400 includes:
  • the network device sends a DCI through some or all of the at least two PDCCH candidates, and the DCI is used to schedule the physical shared channel; correspondingly, the terminal device performs blind detection on the at least two physical downlink control channel PDCCH candidates.
  • the at least two PDCCH candidates are respectively associated with different control resource sets CORESET, and there is an association relationship between the at least two PDCCH candidates.
  • “there is an association relationship between PDCCH candidates” means that the terminal device needs to obtain one DCI signaling according to multiple PDCCH candidates with an association relationship, and the DCI signaling can be used to schedule at least one PUSCH or at least One PDSCH. It should be understood that the above-mentioned at least two PDCCH candidates belong to different SSSs.
  • an alternative way for the aforementioned at least two PDCCH candidates to be respectively associated with different control resource sets CORESET is that the at least two PDCCH candidates may be respectively associated with at least two TCI states configured in the same CORESET.
  • the terminal device determines a DCI according to the result of blind detection performed on the at least two PDCCH candidates.
  • the result of the above-mentioned blind detection may be the soft information value or modulation symbol obtained by the terminal device through blind detection, or the information bit or sequence after demodulation, which is not limited in the embodiment of the present application.
  • the network device sends or receives the physical shared channel according to the aforementioned DCI; correspondingly, the terminal device receives or sends the physical shared channel according to the aforementioned DCI.
  • the at least two PDCCH candidates belong to different SSSs, and the at least two PDCCH candidates are respectively associated with different CORESETs, so that there is an association.
  • the at least two PDCCH candidates of the relationship can use different QCL assumptions to receive data, and the different SSSs corresponding to the at least two PDCCH candidates can independently configure the detection timing, which is beneficial to improve the flexibility of the network device to issue DCI and reduce the reception of the terminal device.
  • the complexity of DCI improves data transmission efficiency.
  • the physical shared channel here may be a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH), which is not limited in this embodiment of the application.
  • PUSCH physical uplink shared channel
  • PDSCH physical downlink shared channel
  • the above-mentioned at least two PDCCH candidates may belong to different SSSs.
  • 5 PDCCH candidates belong to 2 SSSs (including SSS 1 and SSS 2), among which 3 PDCCH candidates belong to SSS 1, and 2 PDCCH candidates belong to SSS 2; for another example , The 3 PDCCH candidates belong to 3 different SSSs.
  • the above-mentioned association relationship between the at least two PDCCH candidates can also be understood as an association relationship between the SSSs corresponding to the at least two PDCCHs.
  • the aforementioned at least two PDCCH candidates are respectively associated with different CORESETs, which can also be understood as the at least two SSSs corresponding to the at least two PDCCH candidates are respectively associated with different CORESETs.
  • the terminal device may respectively determine at least two detection occasions according to the at least two SSSs, and then determine the physical resource location for detecting DCI in combination with the CORESET associated with the SSS.
  • SSS 1 includes PDCCH candidate 1
  • SSS 2 includes PDCCH candidate 2
  • there is an association relationship between SSS 1 and SSS 2 that is, there is an association relationship between PDCCH candidate 1 and PDCCH candidate 2
  • SSS 1 can be associated with CORESET#1
  • SSS 2 can be associated with CORESET#2.
  • the terminal device can determine the detection timing 1 according to the SSS 1, and determine the detection timing 2 according to the SSS 2, and then determine the physical resource location for detecting DCI according to CORESET#1 and CORESET#2.
  • association relationship between at least two PDCCH candidates.
  • This association relationship can be pre-appointed or configured by the network device through signaling for the terminal device.
  • the network device can use system messages or dedicated The RRC message, MAC layer signaling, or physical layer signaling is configured for the terminal device, which is not limited in the embodiment of the present application.
  • the network device and the terminal device can directly determine the association relationship between at least two PDCCH candidates according to the predefined association rules; if the above association relationship is configured by the network device, the network device The device can directly group PDCCH candidates through signaling, and the PDCCH candidates in the same group have an association relationship, or the network device can also configure an association rule so that the terminal device can determine the relationship between at least two PDCCH candidates through the association rule .
  • the existence of an association relationship between at least two PDCCH candidates only means that the information bits sent on the at least two PDCCH candidates are of the same DCI, and it does not mean that the network device will definitely pass the at least two PDCCH candidates. Send DCI.
  • the network device may send DCI on one or more of the at least two PDCCH candidates that have an association relationship; for the terminal device, the terminal device may send DCI on at least two PDCCH candidates that have an association relationship.
  • the information bits on the PDCCH candidates that have an association relationship also have an association relationship, and are used by the terminal device to determine a DCI.
  • the existence of an association relationship between at least two PDCCH candidates indicates that there is an association between information bits obtained by performing blind detection on at least two PDCCH candidates, or one of the blind detection operations performed on at least two PDCCH candidates There is a connection between.
  • the information bits on all PDCCH candidates with an association relationship constitute or include all the information bits of the aforementioned DCI.
  • the information bits on the at least two PDCCH candidates respectively include all the information bits of the above one DCI.
  • a DCI signaling includes X bits, X is a positive integer, the X bits can be a sequence, or a modulation symbol after coding and modulation, etc.
  • the X bits can be subjected to the same or different coding and modulation methods, at least Each of the two PDCCH candidates will carry the X bits.
  • the terminal device can receive information bits on at least two PDCCH candidates, respectively perform maximum likelihood detection and soft decision, and soft merge the two obtained soft information bits to obtain the final DCI.
  • This embodiment can improve the probability of correct detection during the soft combining process, thereby improving the reliability of DCI detection.
  • two pieces of DCI information are respectively transmitted through channels with lower correlation, which can increase the gain of the soft combining operation and is more robust. good.
  • the information bits on the aforementioned at least two PDCCH candidates respectively include part of the information bits of the aforementioned one DCI.
  • the part of the information bits here can be any part of the information bits of a DCI signaling.
  • the network device may carry a part of the modulation symbols in the modulation symbols of a DCI signaling bit string after being coded and modulated on the PDCCH. On candidate 1, the remaining modulation symbols except for the partial modulation symbols are carried on PDCCH candidate 2.
  • the network device may carry a part of the bit string of a DCI signaling bit string through independent coding and modulation to form a modulation symbol on the PDCCH candidate 1, and the remaining part of the bit string except for this part of the bit string may be independently coded and modulated.
  • the modulation symbols formed after coding and modulation are carried on PDCCH candidate 2.
  • the network device may transmit the first 10 bits of a DCI signaling through PDCCH candidate 1, and transmit the last 20 bits of the DCI signaling through PDCCH candidate 2.
  • the network equipment can carry one DCI signaling information bit on at least two CORESETs, and send signals carried on different CORESETs through different TRPs, and the terminal equipment can receive the information bits on at least two PDCCH candidates respectively. , And each perform detection, and obtain the final DCI based on at least two pieces of information obtained.
  • the DCI signaling in this embodiment has relatively low channel correlation during transmission and has diversity gain. Compared with the first possible implementation manner described above, the blind detection complexity of the terminal device is relatively low.
  • the network device can use system messages, dedicated RRC messages, and MAC layers.
  • the signaling or physical layer signaling is configured for the terminal device, which is not limited in the embodiment of the present application.
  • the above-mentioned process for the terminal device to obtain a DCI signaling through at least two PDCCH candidates may include multiple implementations.
  • the terminal device may decode first, and then combine the decoded information bits; the terminal device may also The detected information may be combined first, and then decoded to obtain the final information bits, which is not limited in the embodiment of the present application.
  • the association relationship between at least two PDCCH candidates can essentially also be understood as the association relationship between the PDCCH candidates in different SSSs.
  • it may be configured or agreed that the PDCCH candidate of SSS 1 and the PDCCH candidate of SSS 2 have an association relationship.
  • one or more PDCCH candidates of SSS 1 and one or more PDCCH candidates of SSS 2 may be configured or agreed to have an association relationship. The following describes in detail the association relationship between the above-mentioned at least two PDCCH candidates with reference to FIGS. 5 to 7.
  • At least two PDCCH candidates have the same AL and the same number. That is, it can be agreed in advance that PDCCH candidates with the same number under the same AL have an association relationship.
  • the numbering here is of the AL level, that is, PDCCH candidates are numbered in the same AL in the same SSS.
  • PDCCH candidates with different numbers in the same AL may include non-overlapping time-frequency resource units, such as CCEs.
  • the information bits corresponding to the PDCCH candidates with the same number in the same AL can be soft merged or decoded information bit merged. It should be understood that, for PDCCH candidates that do not have an association relationship, they do not belong to the at least two PDCCH candidates described above, and the terminal device can independently perform blind detection operations, such as parsing, decoding, etc., on them.
  • the terminal device may merge the blind detection results on the above-mentioned PDCCH candidates with the association relationship.
  • the terminal device performs soft merging operations on the PDCCH candidates under the same AL, which can reduce the processing complexity of the terminal device.
  • the association relationship between the PDCCH candidates can be one-to-one or different SSSs. Only some of the PDCCH candidates have an association relationship among them, which can further reduce the processing complexity of the terminal device.
  • At least two PDCCH candidates have different ALs and the same number. That is, PDCCH candidates with the same number under a specific AL (predefined or configured) have an association relationship.
  • the above numbering is at the AL level, that is, PDCCH candidates are numbered in the same AL in the same SSS.
  • the above-mentioned different ALs may be pre-appointed or configured by network equipment.
  • the information bits corresponding to the PDCCH candidates with the same number under a specific AL (predefined or configured) can be soft merged or decoded information bit merged. It should be understood that, for PDCCH candidates that do not have an association relationship, they do not belong to the at least two PDCCH candidates described above, and the terminal device can independently perform blind detection operations, such as parsing, decoding, etc., on them.
  • PDCCH candidates with the same number under a specific AL have an association relationship, which can be divided into the following two situations:
  • Case 1 There is a one-to-one relationship between AL and AL, that is, there is an association relationship between the PDCCH candidate of one AL and the PDCCH candidate of another AL.
  • the terminal device may combine the blind detection results on the above-mentioned PDCCH candidates with the association relationship.
  • the channels of different TRPs are different, by configuring at least two PDCCH candidates with an association relationship to have different ALs, different TRPs can be configured to send DCI to different ALs according to channel conditions, which is more flexible.
  • the association relationship between PDCCH candidates is one-to-one, which can further reduce the processing complexity of the terminal device.
  • the terminal device may combine the blind detection results on the above-mentioned PDCCH candidates with the association relationship.
  • different TRPs can be configured to send DCI to different TRPs according to channel conditions, which improves the network equipment to issue DCI. Flexibility.
  • the reference position indicated by S is the start symbol of the PDCCH detection opportunity.
  • the S in the DCI indicates There may be multiple reference positions for the DCI, and since the original bits included in the repeated transmission of the DCI are the same, the repeated transmission of the DCI will indicate the same S value.
  • the terminal equipment may determine the starting positions of different physical shared channels according to different reference positions; if only one of the DCIs in at least two SSSs is received by the terminal equipment When receiving correctly, the start position of the physical shared channel determined by the terminal device when the DCI in one SSS is correctly received and the DCI in the other SSS is different, but the network device will only determine the position of a physical shared channel, which will cause the terminal Devices and network devices have inconsistent understanding of the starting position of the physical shared channel, which affects the efficiency of data reception.
  • the method further includes: the network device determines a reference position, where the reference position is based on at least one of the at least two CORESETs. A CORESET or at least one of the at least two PDCCH candidates is determined; the network equipment determines the starting position of the physical shared channel based on the reference position; accordingly, the terminal equipment determines the reference position; the terminal equipment is based on the reference position, Determine the starting position of the physical shared channel.
  • the network device sends or receives the physical shared channel according to the DCI, including: the network device sends or receives the physical shared channel based on the starting position; the terminal device receives or sends the physical shared channel according to the DCI, including: the terminal device is based on the physical shared channel The starting position of the channel, receiving or sending the physical shared channel.
  • the aforementioned reference position may be determined according to at least one SSS of at least two SSSs with an association relationship, or determined according to at least one PDCCH candidate of the at least two PDCCH candidates with an association relationship.
  • the network device and the terminal device may determine the above-mentioned reference position in a manner agreed by the agreement in accordance with an agreed rule, so as to determine the starting position of the physical shared channel.
  • the terminal device when the network device adopts the DCI format with the PDCCH detection timing start position as the reference position indicator S, the terminal device can determine the actual physical shared channel start position according to the agreed rule, and ensure that it is issued with the network device The actual starting positions of the physical shared channels are consistent, which helps to improve the efficiency of detection and reception of the physical shared channels.
  • the aforementioned reference position is a reference position determined according to one CORESET of the aforementioned at least two CORESETs or one PDCCH candidate of the at least two PDCCH candidates. Therefore, the network device and the terminal device can determine the starting position of the physical shared channel based on this reference position.
  • the network device sends or receives the physical shared channel based on the starting position of the physical shared channel, including: the network device determines the first field in the DCI and the starting position of the physical shared channel based on the reference position; terminal equipment Based on the reference position, determining the starting position of the physical shared channel includes: the terminal device determines the starting position of the physical shared channel based on a reference position and the first field in the DCI, and the first field is used to indicate the physical shared channel The offset of the starting position relative to the reference position.
  • the DCI is a simplified DCI format, and the terminal device only determines one reference position.
  • the protocol agrees to use the start position of a specific SSS detection opportunity as the reference position, and the network device can determine the first field and the physical field in the DCI issued in at least two associated SSSs according to the rule.
  • the terminal device may determine a reference position according to the rule, and combine the reference position and the first field in the DCI obtained by blind detection to determine the starting position of the physical shared channel.
  • the first field here may be the field where the above S is located (that is, the SLIV field).
  • the start symbol position of the detection timing of the SSS corresponding to the CORESET with the largest number or the smallest number among the at least two CORESETs is the aforementioned reference position.
  • the starting symbol position of the detection occasion of the SSS corresponding to the PDCCH candidate with the largest number or the smallest number among the at least two PDCCH candidates is the aforementioned reference position.
  • the starting symbol position of the detection timing of the SSS with the largest number or the smallest number among the at least two SSSs is the aforementioned reference position.
  • the starting symbol position of the detection timing of the SSS corresponding to the PDCCH candidate with the highest time domain position or the PDCCH candidate with the lowest time domain position among the at least two PDCCH candidates is the aforementioned reference position.
  • At least two CORESET (or at least two PDCCH candidates, Or at least two SSSs) in the middle, or the penultimate largest, or the penultimate smallest CORESET (or at least two PDCCH candidates, or at least two SSS) corresponding to the SSS detection timing of the start symbol position as The foregoing reference position is not limited in the embodiment of the present application.
  • K 0 0, that is, the physical shared channel and DCI are located in the same slot.
  • the terminal device also needs to combine the above-mentioned reference position, the first field, and K 0. , Determine the starting position of the physical shared channel, which will not be repeated here.
  • FIG. 8 shows a schematic diagram of the starting position of the PDSCH.
  • the terminal device can determine that the starting position of the PDSCH still uses the starting position of the detection timing corresponding to SSS 2 as a reference to determine The starting position of the PDSCH that comes out is 6.
  • the embodiment of the present application can be understood as taking at least two SSSs as a whole, and this whole has a detection opportunity, that is, the starting position of the whole detection opportunity is used as a reference position.
  • the agreement specifies the starting position of the detection opportunity corresponding to the smallest numbered SSS in the associated SSS as the reference position, which can prevent the terminal device from receiving the PDSCH at the wrong time, thereby improving the data receiving efficiency.
  • the above-mentioned reference positions are at least two reference positions determined according to the start symbol positions of the detection occasions corresponding to the at least two CORESETs or the at least two PDCCH candidates. Therefore, the network device and the terminal device can determine the starting position of the physical shared channel based on the at least two reference positions.
  • the network device sending or receiving the physical shared channel based on the starting position of the physical shared channel includes: the network device determining the first field and the at least two starting positions in the DCI based on the at least two reference positions;
  • the terminal device determines the starting position of the physical shared channel based on the reference position, including: the terminal device determines at least two starting positions based on the at least two reference positions and the first field in the DCI, and the first field is used to indicate the The offset of at least two starting positions relative to the at least two reference positions.
  • the DCI is a simplified DCI format
  • the terminal device can determine at least two reference positions, that is, determine one reference position for each CORESET or each PDCCH candidate.
  • the network device may transmit the same original bits of DCI in at least two SSSs, and the terminal device may determine at least two reference positions according to the detection timing corresponding to the at least two SSSs, and the terminal device may determine the at least two reference positions according to the at least two SSSs.
  • the first field may be the field where the above S is located (that is, the SLIV field).
  • the aforementioned at least two physical shared channels are at least two repeated transmissions of the same transmission block (TB), which means that the terminal device can combine the soft information received by the at least two physical shared channels. Thereby improving the transmission reliability of the physical shared channel.
  • the frequency domain resources occupied by the foregoing two repeated transmissions may be determined according to the indication of the same DCI signaling, that is, the frequency domain resources occupied by the two repeated transmissions are the same, or the second transmission may be pre-configured or predefined.
  • the frequency domain interval of the second repeated transmission relative to the first repeated transmission, so that the two repeated transmissions occupy different frequency domain resources, and the frequency diversity gain of the transmission is improved.
  • the QCL assumptions used in the foregoing two repeated transmissions are different.
  • An implementation manner is that the QCL assumptions used in the foregoing two repeated transmissions are respectively the same as the QCL assumptions used in the foregoing two CORESETs for scheduling the repeated transmissions.
  • FIG. 9 shows a schematic diagram of the start position of another PDSCH in an embodiment of the present application.
  • SSS 1 and SSS 2 have an association relationship.
  • the foregoing first field is used to indicate at least two S values (also may be referred to as at least two second fields), and the at least two S values are respectively associated with at least two CORESETs or at least two PDCCHs.
  • the candidates have a corresponding relationship, and the at least two S values are respectively used to indicate the offsets of the at least two starting positions with respect to the at least two reference positions; the network device determines the first in the DCI based on the at least two reference positions.
  • the first field of determining at least two starting positions includes: the terminal device determines the at least two starting positions based on the at least two reference positions and the at least two S values.
  • the number of S values indicated by the first field is determined according to the number of CORESET (or SSS) with an association relationship.
  • the embodiment of the present application can determine multiple detection occasions based on multiple SSSs with an association relationship, thereby determining multiple starting positions, thereby repeatedly transmitting multiple physical shared channels based on the multiple starting positions, and improving the transmission reliability of the physical shared channels sex.
  • the detection occasions corresponding to the at least two PDCCH candidates have the same start symbol position, the same end symbol position, or the detection time completely overlaps.
  • the detection timings corresponding to multiple SSSs with an association relationship have the same start symbol position, the same end symbol position, or the detection time completely overlaps.
  • the same starting position of the physical shared channel can be obtained, that is, there is no situation where the network device only sends one physical shared channel, but the terminal device determines at least two different starting positions, the terminal device and the network device.
  • FIG. 10 shows a schematic diagram of another starting position of the PDSCH in an embodiment of the present application.
  • SSS 1 and SSS 2 have an association relationship
  • the reliability and time delay of PDCCH detection are increased to ensure that the terminal The device learns the correct starting position of the physical shared channel, which improves the transmission efficiency of the physical shared channel.
  • FIG. 11 shows a data transmission device 1100 provided in an embodiment of the present application.
  • the apparatus 1100 may be a terminal device or a chip in the terminal device.
  • the device 1100 may be a network device or a chip in a network device.
  • the device 1100 includes: a transceiver unit 1110 and a processing unit 1120.
  • the apparatus 1100 is configured to execute each process and step corresponding to the terminal device in the foregoing method embodiment.
  • the transceiver unit 1110 is configured to perform blind detection on at least two physical downlink control channel PDCCH candidates, at least two PDCCH candidates are respectively associated with different control resource sets CORESET, and there is an association relationship between the at least two PDCCH candidates;
  • the processing unit 1120 is configured to determine a downlink control information DCI according to the results of blind detection on at least two PDCCH candidates, where the DCI is used to schedule a physical shared channel; the above transceiver unit 1110 is also configured to: according to the DCI, Receive or send the physical shared channel.
  • the information bits on the at least two PDCCH candidates respectively include all the information bits of the DCI; or, the information bits on the at least two PDCCH candidates respectively include part of the information bits of the DCI.
  • At least two PDCCH candidates have the same aggregation level AL and the same number; or, at least two PDCCH candidates have different AL and the same number.
  • the processing unit 1120 is further configured to: determine a reference position, the reference position being determined according to at least one CORESET of the at least two CORESETs or at least one PDCCH candidate of the at least two PDCCH candidates; based on the reference position, Determine the starting position of the physical shared channel; the transceiver unit 1110 is specifically configured to receive or send the physical shared channel based on the starting position of the physical shared channel.
  • the reference position is a reference position determined according to one CORESET of the at least two CORESETs or one PDCCH candidate of the at least two PDCCH candidates.
  • the processing unit 1120 is specifically configured to: determine the starting position of the physical shared channel based on a reference position and the first field in the DCI, and the first field is used to indicate that the starting position of the physical shared channel is relative to The offset of this reference position.
  • the reference positions are at least two reference positions determined according to the start symbol positions of the detection occasions corresponding to the at least two CORESETs or the at least two PDCCH candidates.
  • the processing unit 1120 is specifically configured to: determine at least two starting positions based on at least two reference positions and a first field in the DCI, and the first field is used to indicate that the at least two starting positions are relative to each other. Offset from the at least two reference positions.
  • the first field includes at least two second fields, the at least two second fields have a corresponding relationship with at least two CORESET or at least two PDCCH candidates, and the at least two second fields are respectively used to indicate the Offsets of at least two starting positions relative to the at least two reference positions; the processing unit 1120 is specifically configured to: determine the at least two starting positions based on the at least two reference positions and the at least two second fields .
  • the detection occasions corresponding to the at least two PDCCH candidates have the same start symbol position, the same end symbol position, or the detection time completely overlaps.
  • the apparatus 1100 is configured to execute each process and step corresponding to the network device in the foregoing method embodiment.
  • the processing unit 1120 is configured to determine to send one downlink control information DCI on at least two physical downlink control channel PDCCH candidates, the DCI is used to schedule a physical shared channel, and the at least two PDCCH candidates are respectively associated with different control resource sets CORESET, there is an association relationship between the at least two PDCCH candidates; the transceiver unit 1110 is configured to: send the DCI on the at least two PDCCH candidates; and, according to the DCI, send or receive a physical shared channel.
  • the information bits on the at least two PDCCH candidates respectively include all the information bits of the DCI; or, the information bits on the at least two PDCCH candidates respectively include part of the information bits of the DCI.
  • At least two PDCCH candidates have the same aggregation level AL and the same number; or, at least two PDCCH candidates have different AL and the same number.
  • the processing unit 1120 is further configured to: determine a reference position, the reference position being determined according to at least one CORESET of the at least two CORESETs or at least one PDCCH candidate of the at least two PDCCH candidates; based on the reference position, Determine the starting position of the physical shared channel; the transceiver unit 1110 is specifically used to send or receive the physical shared channel based on the starting position of the physical shared channel.
  • the reference position is a reference position determined according to one CORESET of the at least two CORESETs or one PDCCH candidate of the at least two PDCCH candidates.
  • the processing unit 1120 is specifically configured to determine the first field in the DCI and the starting position of the physical shared channel based on the reference position, and the first field is used to indicate that the starting position of the physical shared channel is relative to The offset of this reference position.
  • the reference positions are at least two reference positions determined according to the start symbol positions of the detection occasions corresponding to the at least two CORESETs or the at least two PDCCH candidates.
  • the processing unit 1120 is specifically configured to determine a first field and at least two starting positions in the DCI based on the at least two reference positions, and the first field is used to indicate the at least two starting positions The offset relative to the at least two reference positions.
  • the first field includes at least two second fields, the at least two second fields have a corresponding relationship with at least two CORESET or at least two PDCCH candidates, and the at least two second fields are respectively used to indicate the Offsets of at least two starting positions relative to the at least two reference positions; the processing unit 1120 is specifically configured to determine the at least two fields and the at least two starting positions based on the at least two reference positions.
  • the detection occasions corresponding to the at least two PDCCH candidates have the same start symbol position, the same end symbol position, or the detection time completely overlaps.
  • the device 1100 here is embodied in the form of a functional unit.
  • the term "unit” here can refer to application specific integrated circuits (ASICs), electronic circuits, processors used to execute one or more software or firmware programs (such as shared processors, proprietary processors, or groups). Processor, etc.) and memory, merged logic circuits, and/or other suitable components that support the described functions.
  • ASICs application specific integrated circuits
  • the apparatus 1100 may be specifically a terminal device or a network device in the foregoing embodiment, and the apparatus 1100 may be used to execute each of the terminal devices or network devices in the foregoing method embodiment. To avoid repetition, the process and/or steps will not be repeated here.
  • the apparatus 1100 in each of the foregoing solutions has the function of implementing the corresponding steps performed by the terminal device or the network device in the foregoing method; the foregoing 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-mentioned functions.
  • the above-mentioned transceiver unit 1110 may include a sending unit and a receiving unit, and the sending unit may be used to implement various steps and/or processes for performing the sending action corresponding to the above-mentioned transceiver unit, and the receiving unit may be used to implement the above-mentioned transceiver unit.
  • the various steps and/or processes used to perform the receiving action The sending unit can be replaced by a transmitter, and the receiving unit can be replaced by a receiver, respectively performing the receiving and sending operations and related processing operations in each method embodiment.
  • the device 1100 in FIG. 11 may also be a chip or a chip system, such as a system on chip (system on chip, SoC).
  • the transceiver unit 1110 may be the transceiver circuit of the chip, which is not limited here.
  • FIG. 12 shows another data transmission device 1200 provided by an embodiment of the present application.
  • the device 1200 includes a processor 1210, a transceiver 1220, and a memory 1230.
  • the processor 1210, the transceiver 1220, and the memory 1230 communicate with each other through an internal connection path.
  • the memory 1230 is used to store instructions, and the processor 1210 is used to execute instructions stored in the memory 1230 to control the transceiver 1220 to send signals and / Or receive the signal.
  • the apparatus 1200 is configured to execute each process and step corresponding to the terminal device in the above method 200.
  • the transceiver 1220 is configured to: perform blind detection on at least two physical downlink control channel PDCCH candidates, at least two PDCCH candidates are respectively associated with different control resource sets CORESET, and there is an association relationship between the at least two PDCCH candidates;
  • the processor 1210 is configured to determine a downlink control information DCI according to the results of blind detection on the at least two PDCCH candidates, where the DCI is used to schedule a physical shared channel; the transceiver 1220 is also configured to: receive according to the DCI Or send a physical shared channel.
  • the apparatus 1200 is configured to execute each process and step corresponding to the network device in the above method 200.
  • the processor 1210 is configured to: determine to send one downlink control information DCI on at least two physical downlink control channel PDCCH candidates, the DCI is used to schedule the physical shared channel, and the at least two PDCCH candidates are respectively associated with different control resource sets CORESET , There is an association relationship between at least two PDCCH candidates; the transceiver 1220 is configured to: send the DCI on the at least two PDCCH candidates; and, according to the DCI, send or receive a physical shared channel.
  • the apparatus 1200 may be specifically a terminal device or a network device in the foregoing embodiment, and may be used to execute various steps and/or processes corresponding to the terminal device or the network device in the foregoing method embodiment.
  • the memory 1230 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A part of the memory may also include a non-volatile random access memory.
  • the memory can also store device type information.
  • the processor 1210 may be used to execute instructions stored in the memory, and when the processor 1210 executes the instructions stored in the memory, the processor 1210 is used to execute each of the above method embodiments corresponding to the terminal device or the network device. Steps and/or processes.
  • the transceiver 1220 may include a transmitter and a receiver, and the transmitter may be used to implement various steps and/or processes for performing the sending action corresponding to the above transceiver, and the receiver may be used to implement the corresponding use of the above transceiver. To perform the various steps and/or processes of the receiving action.
  • the processor of the above-mentioned device may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), or application-specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • each step of the above method can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software units in the processor.
  • the software unit may be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor executes the instructions in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the implementation of this application also provides a communication system, which may include the terminal device shown in FIG. 11 or FIG. 12 (the apparatus 1100 or the device 1200 is embodied as a terminal device), and the network shown in FIG. 11 or FIG. Device (the device 1100 or the device 1200 is embodied as a network device).
  • a communication system may include the terminal device shown in FIG. 11 or FIG. 12 (the apparatus 1100 or the device 1200 is embodied as a terminal device), and the network shown in FIG. 11 or FIG. Device (the device 1100 or the device 1200 is embodied as a network device).
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the above-mentioned units 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 may be Integrate into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they 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.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium. It includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

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Abstract

本申请提供了一种数据传输的方法和装置，有利于提高网络设备下发DCI的灵活性，从而提高数据传输效率。该方法包括：网络设备在至少两个PDCCH候选上发送一个DCI，对应地，终端设备在该至少两个PDCCH候选上进行盲检测，该DCI用于调度物理共享信道，该至少两个PDCCH候选分别关联不同的CORESET，该至少两个PDCCH候选之间存在关联关系；该终端设备根据在至少两个PDCCH候选上进行盲检测的结果，确定一个下行控制信息DCI；网络设备根据该DCI，发送或接收物理共享信道，对应地，终端设备根据该DCI，接收或发送该物理共享信道。

Description

数据传输的方法和装置 技术领域
本申请涉及通信领域，特别涉及一种数据传输的方法和装置。
背景技术
在通信系统中，例如长期演进(long term evolution，LTE)和新无线(new radio，NR)系统中，下行控制信息(downlink control information，DCI)通过物理下行控制信道(physical downlink control channel，PDCCH)承载，PDCCH候选用于规定终端设备的盲检测行为，通常情况下，网络设备在多个PDCCH候选中选择一个PDCCH候选发送DCI。终端设备并不知道网络设备在多个PDCCH候选中选择的是哪一个PDCCH候选，因此，终端设备需要在多个PDCCH候选上进行盲检测，即逐一尝试PDCCH解调和译码，直到可以成功找到PDCCH信道，获取DCI为止。搜索空间集合(search space set，SSS)包括一个或多个PDCCH候选，终端设备在PDCCH候选上进行盲检测，也可以理解为终端设备在SSS中进行盲检测。
控制资源集(control resource set，CORESET)是网络设备配置的用于承载下行控制信息(downlink control information，DCI)的物理资源集合。一个SSS可以关联至少两个CORESET，不同的CORESET可以配置不同的TCI状态。为了增加PDCCH传输的可靠性，网络设备可以将同一DCI的信息比特在上述至少两个CORESET上发送，终端设备可以将通过该至少两个CORESET所获得的DCI进行合并，从而获得最终的DCI。由于检测时机是针对SSS配置的，将一个SSS关联到至少两个CORESET，该至少两个CORESET的检测时机是相同的，从而限定了DCI的发送时刻是相同的，导致网络设备下发DCI的灵活性较差。
发明内容
本申请提供一种数据传输的方法和装置，有利于提高网络设备下发DCI的灵活性，从而提高数据传输效率。
第一方面，提供了一种数据传输的方法，包括：终端设备在至少两个物理下行控制信道PDCCH候选上进行盲检测，至少两个PDCCH候选分别关联不同的控制资源集CORESET，至少两个PDCCH候选之间存在关联关系；终端设备根据在至少两个PDCCH候选上进行盲检测的结果，确定一个下行控制信息DCI，该DCI用于调度物理共享信道；终端设备根据该DCI，接收或发送物理共享信道。
可选地，上述至少两个PDCCH候选分别关联不同的控制资源集CORESET的一种替代方式是，该至少两个PDCCH候选可以分别关联同一个CORESET中配置的至少两个TCI状态。
本申请实施例的数据传输方法，通过配置至少两个PDCCH候选之间的关联关系，该 至少两个PDCCH候选属于不同的SSS，且令该至少两个PDCCH候选分别关联不同的CORESET，使得具备关联关系的至少两个PDCCH候选可以采用不同的QCL假设接收，且对应的不同SSS可以独立配置检测时机，有利于提高网络设备下发DCI的灵活性，从而提高数据传输效率。
上述“PDCCH候选之间存在关联关系”是指：终端设备需要根据具备关联关系的多个PDCCH候选获取一个DCI信令，该DCI信令可以用于调度至少一个PUSCH或者至少一个PDSCH。应理解，上述至少两个PDCCH候选属于不同的SSS。
应理解，至少两个PDCCH候选之间存在关联关系，仅仅表示该至少两个PDCCH候选上发送的信息比特是同一个DCI的，并不意味着网络设备一定会通过该至少两个PDCCH候选上发送DCI。对于网络设备而言，网络设备可以在具有关联关系的至少两个PDCCH候选中的一个或多个PDCCH候选上发送DCI；对于终端设备而言，终端设备要在具有关联关系的至少两个PDCCH候选上进行盲检测，根据在至少两个PDCCH候选上进行盲检测的结果，确定一个DCI。换句话说，具有关联关系的PDCCH候选上的信息比特也具有关联关系，用于终端设备确定一个DCI。
结合第一方面，在第一方面的某些实现方式中，至少两个PDCCH候选上的信息比特分别包括DCI的全部信息比特；或者，至少两个PDCCH候选上的信息比特分别包括DCI的部分信息比特。
在第一种可能的实现方式中，上述至少两个PDCCH候选上的信息比特分别包括上述一个DCI的全部信息比特。终端设备可以在至少两个PDCCH候选上分别接收信息比特，并分别执行最大似然检测和软判决，将获得的两份软信息比特进行软合并，从而获得最终的DCI。本实施例在软合并过程中能够提升正确检测概率，进而提升DCI检测的可靠性，此外，两份DCI信息分别经历相关性较低的信道传输，可以增加软合并操作的增益，鲁棒性更好。
在第二种可能的实现方式，上述至少两个PDCCH候选上的信息比特分别包括上述一个DCI的部分信息比特。这里的部分信息比特可以是一个DCI信令的信息比特的任意一部分。网络设备可以将一个DCI信令的信息比特承载于至少两个CORESET上，通过不同的TRP发送承载于不同CORESET上的信号，终端设备可以在至少两个PDCCH候选上分别接收信息比特，并各自执行检测，根据获取的至少两份信息获得最终的DCI。本实施例可以理解为，聚合级别(aggregation level，AL)较小的至少两个PDCCH候选可以聚合形成一个AL较大的PDCCH候选，例如，AL＝4的两个PDCCH候选可以形成一个AL＝8的PDCCH候选。本实施例的DCI信令在传输过程中经历的信道相关性比较低，具备分集增益，与上述第一种可能的实现方式相比，终端设备的盲检测复杂度较低。
应理解，上述终端设备通过至少两个PDCCH候选获取一个DCI信令的过程可以包括多种实现方式，例如，终端设备可以先进行译码，在对译码后的信息比特进行合并；终端设备也可以先将检测到的信息进行合并，再进行译码获得最终的信息比特，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，至少两个PDCCH候选具有相同的AL和相同的编号；或者，至少两个PDCCH候选具有不同的AL和相同的编号。
由于PDCCH候选是属于SSS的，至少两个PDCCH候选之间的关联关系本质上也可 以理解为不同的SSS中PDCCH候选之间的关联关系。例如，可以配置或约定SSS 1的PDCCH候选与SSS 2的PDCCH候选之间具有关联关系。进一步地，可以配置或约定SSS 1的一个或多个PDCCH候选与SSS 2的一个或多个PDCCH候选之间具有关联关系。
在一种可能的实现方式中，至少两个PDCCH候选具有相同的AL和相同的编号。即可以预先约定相同AL下相同编号的PDCCH候选具有关联关系。这里的编号是AL级别的，即在同一SSS中的同一AL内对PDCCH候选进行编号。示例性地，相同AL下不同编号的PDCCH候选可以包括不重叠的时频资源单元，例如，控制信道元素(control channel element，CCE)。在本实施例中，终端设备执行盲检测之后，可以将相同AL下相同编号的PDCCH候选对应的信息比特进行软合并操作或者译码后的信息比特合并的操作。应理解，对于没有关联关系的PDCCH候选，则不属于上述至少两个PDCCH候选，该终端设备可以对其独立执行盲检测操作，例如解析、译码等。
这样，终端设备对相同AL下的PDCCH候选执行软合并操作，可以降低终端设备的处理复杂度，此外，PDCCH候选之间的关联关系可以是一对一的，或者是不同SSS中仅有部分PDCCH候选之间存在关联关系，这样可以进一步降低终端设备的处理复杂度。
在另一种可能的实现方式中，至少两个PDCCH候选具有不同的AL和相同的编号。即特定AL(预定义或配置的)下相同编号的PDCCH候选具有关联关系。上述编号是AL级别的，即在同一SSS中的同一AL内对PDCCH候选进行编号。上述不同的AL可以是预先约定的或者网络设备配置的。在本实施例中，终端设备执行盲检测之后，可以将特定AL(预定义或配置的)下相同编号的PDCCH候选对应的信息比特进行软合并操作或者译码后的信息比特合并的操作。应理解，对于没有关联关系的PDCCH候选，则不属于上述至少两个PDCCH候选，该终端设备可以对其独立执行盲检测操作，例如解析、译码等。
特定AL(预定义或配置的)下相同编号的PDCCH候选具有关联关系，可以分为下列两种情况：情况1、AL与AL之间是一对一的关系，即一个AL的PDCCH候选与另一个AL PDCCH候选之间具有关联关系。由于不同TRP的信道不同，通过配置具有关联关系的至少两个PDCCH候选具有不同的AL，可以根据信道条件给不同TRP配置不同的AL发送DCI，灵活性较高，此外，PDCCH候选之间的关联关系是一对一的，这样可以进一步降低终端设备的处理复杂度。情况2、AL与AL之间的一对多的关系，即一个AL的PDCCH候选与至少两个AL的PDCCH候选之间具有关联关系。由于不同TRP的信道不同，通过配置具有关联关系的至少两个PDCCH候选具有不同的AL，可以根据信道条件给不同TRP配置不同的AL发送DCI，提高网络设备下发DCI的灵活度。
结合第一方面，在第一方面的某些实现方式中，在终端设备根据该DCI，接收或发送物理共享信道之前，上述方法还包括：终端设备确定参考位置，该参考位置是根据至少两个CORESET中的至少一个CORESET或至少两个PDCCH候选中的至少一个PDCCH候选确定的；终端设备基于该参考位置，确定物理共享信道的起始位置；终端设备根据该DCI，接收或发送物理共享信道，包括：终端设备基于物理共享信道的起始位置，接收或发送物理共享信道。
上述参考位置可以是根据存在关联关系的至少两个SSS中的至少一个SSS确定的，或者是根据存在关联关系的至少两个PDCCH候选中的至少一个PDCCH候选确定的。具体地，网络设备和终端设备可以按照约定规则，通过协议约定的方式确定上述参考位置， 从而确定物理共享信道的起始位置。
在本申请实施例中，网络设备采用以PDCCH检测时机起始位置作为参考位置指示S的DCI格式时，终端设备可以按照约定规则确定实际的物理共享信道的起始位置，保证与网络设备下发物理共享信道的实际起始位置一致，有利于提高物理共享信道的检测和接收的效率。
结合第一方面，在第一方面的某些实现方式中，上述参考位置是根据至少两个CORESET中的一个CORESET或至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。因此，网络设备和终端设备可以基于这一个参考位置，确定物理共享信道的起始位置。
示例性地，可以约定至少两个CORESET中编号最大的或者编号最小的CORESET对应的SSS的检测时机的起始符号位置为上述参考位置。
示例性地，可以约定至少两个PDCCH候选中编号最大的或者编号最小的PDCCH候选对应的SSS的检测时机的起始符号位置为上述参考位置。
示例性地，可以约定至少两个SSS中编号最大的或者编号最小的SSS的检测时机的起始符号位置为上述参考位置。
示例性地，可以约定至少两个PDCCH候选中时域位置最靠前的或者时域位置最靠后的PDCCH候选对应的SSS的检测时机的起始符号位置为上述参考位置。
结合第一方面，在第一方面的某些实现方式中，终端设备基于参考位置，确定物理共享信道的起始位置，包括：终端设备基于上述一个参考位置和该DCI中的第一字段，确定物理共享信道的起始位置，该第一字段用于指示物理共享信道的起始位置相对于该参考位置的偏移。
在本申请实施例中，DCI是精简的DCI格式，终端设备仅确定一个参考位置。具体而言，协议约定采用特定的某个SSS的检测时机的起始位置作为参考位置，网络设备可以根据该规则确定至少两个具有关联关系的SSS中下发的DCI中的第一字段和物理共享信道的实际位置。终端设备可以根据该规则确定一个参考位置，结合该参考位置和盲检测获得的DCI中的第一字段，确定物理共享信道的起始位置。
结合第一方面，在第一方面的某些实现方式中，上述参考位置是根据至少两个CORESET或至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。因此，网络设备和终端设备可以基于该至少两个参考位置，确定物理共享信道的起始位置。
结合第一方面，在第一方面的某些实现方式中，终端设备基于该参考位置，确定物理共享信道的起始位置，包括：终端设备基于上述至少两个参考位置和该DCI中的第一字段，确定至少两个起始位置，该第一字段用于指示该至少两个起始位置相对于该至少两个参考位置的偏移。
在本申请实施例中，DCI可以是精简的DCI格式，终端设备可以确定至少两个参考位置，即针对每个CORESET或每个PDCCH候选，确定一个参考位置。具体而言，网络设备可以在至少两个SSS上下发DCI的原始比特相同，终端设备可以根据至少两个SSS对应的检测时机分别确定出至少两个参考位置，则终端设备可以根据该至少两个参考位置以及盲检测获得的DCI中的第一字段，确定出至少两个起始位置，从而在该至少两个起始位 置上接收或发送至少两个物理共享信道。
可选地，上述至少两个物理共享信道是同一个传输块(Transmission block，TB)的至少两次重复传输，意味着终端设备可以基于该至少两个物理共享信道接收到的软信息进行合并，从而提升物理共享信道的传输可靠性。
可选地，上述两次重复传输所占的频域资源均可以根据同一个DCI信令的指示确定，即两次重复传输所占的频域资源相同，或者，还可以预先配置或预定义第二次重复传输相对第一次重复传输的频域间隔，从而使得两次重复传输占用不同的频域资源，提升传输的频率分集增益。
可选地，上述两次重复传输所采用的QCL假设不同。一种实现方式是，上述两次重复传输所采用的QCL假设分别与调度该重复传输的上述两个CORESET所采用的QCL假设相同。
结合第一方面，在第一方面的某些实现方式中，第一字段包括至少两个第二字段，该至少两个第二字段与至少两个CORESET或至少两个PDCCH候选具有对应关系，该至少两个第二字段分别用于指示该至少两个起始位置相对于该至少两个参考位置的偏移；终端设备基于该至少两个参考位置和该DCI中的第一字段，确定至少两个起始位置，包括：终端设备基于该至少两个参考位置和该至少两个第二字段，确定至少两个起始位置。
上述至少两个第二字段即为第一字段所指示的至少两个S值。第一字段所指示的S值的数量是根据具有关联关系的CORESET(或者SSS)的数量确定的。终端设备可以分别根据至少两个参考位置以及对应的至少两个S值，确定对应的起始位置。
因此，本申请实施例可以根据多个具备关联关系的SSS确定多个检测时机，从而确定多个起始位置，从而基于该多个起始位置重复传输多个物理共享信道，提高物理共享信道的传输可靠性。
结合第一方面，在第一方面的某些实现方式中，该至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
本申请实施例通过限定多个具备关联关系的SSS的检测时机的起始位置相同、结束符号位置相同、或者检测时间完全重叠，在增加了PDCCH检测的可靠性和时延的基础上，确保终端设备获知正确的物理共享信道的起始位置，提高了物理共享信道的传输效率。
第二方面，提供了另一种数据传输的方法，包括：网络设备在至少两个物理下行控制信道PDCCH候选上发送下行控制信息DCI，该DCI用于调度物理共享信道，至少两个PDCCH候选分别关联不同的控制资源集CORESET，至少两个PDCCH候选之间存在关联关系；网络设备根据该DCI，发送或接收物理共享信道。
结合第二方面，在第二方面的某些实现方式中，至少两个PDCCH候选上的信息比特分别包括该DCI的全部信息比特；或者，至少两个PDCCH候选上的信息比特分别包括该DCI的部分信息比特。
结合第二方面，在第二方面的某些实现方式中，至少两个PDCCH候选具有相同的聚合级别AL和相同的编号；或者，至少两个PDCCH候选具有不同的AL和相同的编号。
结合第二方面，在第二方面的某些实现方式中，在网络设备在至少两个物理下行控制信道PDCCH候选上发送下行控制信息DCI之前，上述方法还包括：网络设备确定参考位置，该参考位置是根据至少两个CORESET中的至少一个CORESET或至少两个PDCCH 候选中的至少一个PDCCH候选确定的；网络设备基于该参考位置，确定物理共享信道的起始位置；网络设备根据该DCI，发送或接收物理共享信道，包括：网络设备基于该起始位置，发送或接收物理共享信道。
结合第二方面，在第二方面的某些实现方式中，上述参考位置是根据至少两个CORESET中的一个CORESET或至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。
结合第二方面，在第二方面的某些实现方式中，网络设备基于物理共享信道的起始位置，发送或接收物理共享信道，包括：网络设备基于该参考位置，确定该DCI中的第一字段以及物理共享信道的起始位置，该第一字段用于指示物理共享信道的起始位置相对于该参考位置的偏移。
结合第二方面，在第二方面的某些实现方式中，上述参考位置是根据至少两个CORESET或至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。
结合第二方面，在第二方面的某些实现方式中，网络设备基于物理共享信道的起始位置，发送或接收物理共享信道，包括：网络设备基于该至少两个参考位置，确定该DCI中的第一字段以及至少两个起始位置，该第一字段用于指示该至少两个起始位置相对于该至少两个参考位置的偏移。
结合第二方面，在第二方面的某些实现方式中，第一字段包括至少两个第二字段，该至少两个第二字段与至少两个CORESET或至少两个PDCCH候选具有对应关系，该至少两个第二字段分别用于指示该至少两个起始位置相对于该至少两个参考位置的偏移；网络设备基于该至少两个参考位置，确定该DCI中的第一字段以及至少两个起始位置，包括：网络设备基于该至少两个参考位置，确定该至少两个字段以及该至少两个起始位置。
结合第二方面，在第二方面的某些实现方式中，该至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
第三方面，提供了一种数据传输的装置，用于执行上述各方面中任一种可能的实现方式中的方法。具体地，该装置包括用于执行上述各方面中任一种可能的实现方式中的方法的单元。
第四方面，提供了一种数据传输的装置，包括处理器，该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述各方面中任一种可能实现方式中的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该数据传输的装置为终端设备。当该数据传输的装置为终端设备时，通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该数据传输的装置为配置于终端设备中的芯片。当该数据传输的装置为配置于终端设备中的芯片时，通信接口可以是输入/输出接口。
第五方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。处理电路用于通过输入电路接收信号，并通过输出电路发射信号，使得处理器执行上述各方面中任一种可能实现方式中的方法。
在具体实现过程中，上述处理器可以为芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所 接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第六方面，提供了一种处理装置，包括处理器和存储器。该处理器用于读取存储器中存储的指令，并可通过接收器接收信号，通过发射器发射信号，以执行上述各方面中任一种可能实现方式中的方法。
可选地，处理器为一个或多个，存储器为一个或多个。
可选地，存储器可以与处理器集成在一起，或者存储器与处理器分离设置。
在具体实现过程中，存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
应理解，相关的数据交互过程例如发送指示信息可以为从处理器输出指示信息的过程，接收能力信息可以为处理器接收输入能力信息的过程。具体地，处理输出的数据可以输出给发射器，处理器接收的输入数据可以来自接收器。其中，发射器和接收器可以统称为收发器。
上述第六方面中的处理装置可以是一个芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
第七方面，提供了一种计算机程序产品，计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当计算机程序被运行时，使得计算机执行上述各方面中任一种可能实现方式中的方法。
第八方面，提供了一种计算机可读存储介质，计算机可读存储介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述各方面中任一种可能实现方式中的方法。
第九方面，提供了一种通信系统，包括前述的终端设备和网络设备。
附图说明
图1示出了本申请实施例的通信系统的示意图。
图2示出了普通的DCI格式对应的PDSCH的起始位置的示意图。
图3示出了精简的DCI格式对应的PDSCH的起始位置的示意图。
图4示出了本申请实施例的一种数据传输的方法的示意性流程图。
图5示出了本申请实施例的一种PDCCH候选之间的关联关系的示意图。
图6示出了本申请实施例的另一种PDCCH候选之间的关联关系的示意图。
图7示出了本申请实施例的又一种PDCCH候选之间的关联关系的示意图。
图8示出了本申请实施例的PDSCH的起始位置的示意图。
图9示出了本申请实施例的另一PDSCH的起始位置的示意图。
图10示出了本申请实施例的又一PDSCH的起始位置的示意图。
图11示出了本申请实施例的数据传输的装置的示意性框图。
图12示出了本申请实施例的另一数据传输的装置的示意性框图。
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(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。
还应理解，本申请实施例的技术方案还可以应用于各种基于非正交多址接入技术的通信系统，例如稀疏码多址接入(sparse code multiple access，SCMA)系统，当然SCMA在通信领域也可以被称为其他名称；进一步地，本申请实施例的技术方案可以应用于采用非正交多址接入技术的多载波传输系统，例如采用非正交多址接入技术正交频分复用(orthogonal frequency division multiplexing，OFDM)、滤波器组多载波(filter bank multi-carrier，FBMC)、通用频分复用(generalized frequency division multiplexing，GFDM)、滤波正交频分复用(filtered-OFDM，F-OFDM)系统等。
为便于理解本申请实施例，首先结合图1详细说明适用于本申请实施例的通信系统。图1示出了适用于本申请实施例的通信系统的示意图。如图1所示，该通信系统100可以包括至少一个网络设备，例如图1所示的网络设备110；该通信系统100还可以包括至少一个终端设备，例如图1所示的终端设备120。网络设备110与终端设备120可通过无线链路通信。各通信设备，如网络设备110或终端设备120，可以配置多个天线，该多个天线可以包括至少一个用于发送信号的发射天线和至少一个用于接收信号的接收天线。另外，各通信设备还附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件(例如处理器、调制器、复用器、解调器、解复用器或天线等)。因此，网络设备110与终端设备120可通过多天线技术通信。
本申请实施例中的终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，该终端设备可称为接入终端、用户设备(user equipment，UE)、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。接入终端可以是蜂窝电话、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、个人数字处理(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共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
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，CRAN)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、路边站，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网络中的网络设备等，本申请实施例对此并不限定。例如，NR系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括射频单元(radio unit，RU)。CU实现gNB的部分功能，DU实现gNB的部分功能，比如，CU实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+CU发送的。可以理解的是，网络设备可以为CU节点、或DU节点、或包括CU节点和DU节点的设备。此外，CU可以划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
上述网络设备还可以泛指网络端所有设备的总称，例如采用多个TRP传输数据给终端设备时，可以将多个TRP统称为网络设备。
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，计算机可读存储介质可以包括，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。
本申请实施例可以适用于LTE系统、车联网以及后续的演进系统如5G等，或其他采用各种无线接入技术的无线通信系统，如采用码分多址，频分多址，时分多址，正交频分多址，单载波频分多址等接入技术的系统，尤其适用于需要信道信息反馈和/或应用二级预编码技术的场景，例如应用Massive MIMO技术的无线网络、应用分布式天线技术的无线网络等。
应理解，多输入输出(multiple-input multiple-output，MIMO)技术是指在发送端设备和接收端设备分别使用多个发射天线和接收天线，使信号通过发送端设备与接收端设备的多个天线传送和接收，从而改善通信质量。它能充分利用空间资源，通过多个天线实现多发多收，在不增加频谱资源和天线发射功率的情况下，可以成倍地提高系统信道容量。
为便于理解，下面先介绍本申请实施例涉及的相关术语。
1、控制信道元素(control channel element，CCE)
CCE是PDCCH的基本物理单元，即一个PDCCH信道是由一个或多个CCE组成的。一个CCE可以包括6个资源元素组(resource element group，REG)，其中，每个REG在频域上可以包括1个RB，即12个资源元素(resource element，RE)，在时域上可以包括1个正交频分多路复用技术(orthogonal frequency division multiplexing，OFDM)符号。控制资源集合(control resource set，CORESET)所占的物理资源决定了该CORESET中包括的CCE数量。示例性地，一个CORESET占用24个RB和1个OFDM符号，在一种可能的实现方式中，可以按照非交织的映射方式，将该24个RB划分为4个CCE并编号，每个CCE包括连续的6个REG；在另一种可能的实现方式中，可以按照交织的映射方式，将多个非连续的REG组成一个CCE。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交织或者非交织的方式。
2、控制资源集(control resource set，CORESET)
CORESET是网络设备配置的用于承载下行控制信息(downlink control information，DCI)的物理资源集合。一个CORESET是包含多个CCE或者多个REG的物理资源。示例性地，在频域上，一个CORESET可以占用的资源块(resource block，RB)数目为6的整数倍，并采用位图的形式配置，例如，可以配置一个CORESET占用12个RB；在时域上，一个CORESET可以占用连续的一个或多个OFDM符号，例如，可以配置一个CORESET占用连续的1～3个OFDM符号。
CORESET是通过高层信令配置的。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)。此外，CORESET中还可以配置相应的解调参考信号(demodulation reference signal，DMRS)序列或者DCI比特的加扰序列。
3、搜索空间集合(search space set，SSS)
终端设备可以监听一个或多个搜索空间集合SSS，从而获取对应的DCI，每个搜索空间集合的标识与一个CORESET的标识关联，从而使得终端设备获知每个搜索空间集合所占的物理资源。SSS用于规定终端设备的盲检测行为。DCI盲检测的含义是：在DCI占用 的物理资源池(即对应的SSS)内，按照一定规则在不同的资源上接收DMRS，进行信道估计，以及按照不同的DCI格式和加扰方式进行信号检测和译码。
一个SSS中可以包括如下配置信息：
(1)该SSS的标识(SSS ID)
(2)该SSS所关联的CORESET
SSS和CORESET关联，从而终端设备可以按照SSS定义的检测行为在所关联的CORESET对应的物理资源上进行DCI的盲检测。应理解，一个CORESET可以关联多个SSS，一个SSS关联一个CORESET。
(3)检测时机(monitoring occasion)
通过配置该SSS的检测周期、偏置(例如以时隙(slot)为单位)和OFDM符号位置(例如可以通过位图(bitmap)形式指示)，终端设备可以确定DCI检测时刻。示例性地，SSS 1关联了CORESET 1，则终端设备可以根据SSS 1的检测时机确定时域位置，根据CORESET 1确定频域位置，在所确定的时域位置和频域位置上盲检测SSS 1对应的DCI。检测周期可以配置为1个slot或者N个OFDM符号。
(4)聚合级别(aggregation level，AL)
一个DCI所占的频域资源包括连续的n个CCE，其中n就可以称为该DCI对应的AL。换句话说，AL的值为一个DCI包括的CCE数量，AL的候选值可以为：{1,2,4,8,16}。不同的AL可以适配不同的信道条件，例如，信道的信号噪声干扰比(signal to interference plus noise ratio，SINR)较低的情况下，网络设备可以采用较大的AL发送DCI，从而增加传输可靠性；反之，网络设备可以采用较小的AL发送DCI，从而节省资源开销。
(5)每个AL下PDCCH候选(candidiate)的数量
网络设备为终端设备配置了SSS和CORESET之后，终端设备根据SSS和CORESET配置可以确定出PDCCH的时频位置。网络设备还需要告知终端设备在该时频位置上如何依次检测可能下发的DCI，也就是如何做盲检测。因此，网络设备需要通过配置PDCCH候选告知终端设备每次DCI盲检测对应的物理资源大小和位置。PDCCH候选可以理解为终端设备盲检测DCI的基本粒度，一个PDCCH候选对应一次DCI检测或者一个DCI检测进程(执行信息比特的解析、译码、判决等操作)，PDCCH候选的数量体现了终端设备检测DCI的复杂度。示例性地，表一为子载波间隔与PDCCH候选的数量的对应关系，网络设备可以根据不同的子载波间隔，配置不同的PDCCH候选。
表一
子载波间隔(kHz) PDCCH候选的最大检测数量
15 44
30 36
60 22
120 20
终端设备可以根据AL取值，确定该AL下的PDCCH候选所占的物理资源数量，并 根据该AL下的每个PDCCH候选的索引值、关联的CORESET ID，CORESET包括的CCE数量等信息，确定AL下的每个PDCCH候选所占的物理资源。
此外，SSS中还可以包括相应DCI格式信息、无线网络临时标识(radio network tempory identity，RNTI)等信息，用于指示终端设备检测、解析DCI的方式。
4、传输配置指示(transmission configuration indicator，TCI)状态
一个TCI状态包含了准共址(quasi co-location，QCL)假设的指示信息，该指示信息用于指示参考信号(reference signal，RS)与PDCCH的DMRS之间具备相同的QCL假设。
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)包括：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)。
准共址类型B(QCL-Type B)包括：多普勒频移，多普勒扩展。
准共址类型C(QCL-Type C)包括：平均时延，时延扩展。
准共址类型D(QCL-Type D)包括：空间接收参数(spatial Rx parameter)。
当CORESET中的一个TCI状态配置了某个QCL类型下的RS，则该CORESET中的DMRS和该RS具备相同的该QCL类型下的QCL假设。每个CORESET可以独立配置一个TCI状态。
5、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。下面详细介绍一种精简的DCI格式，例如上述DCI格式1_2。
该精简的DCI格式的特点在于，大部分字段的比特位数均可配置，比如可以配置为比特数较少的字段，并且，该DCI中指示调度PDSCH时域位置的字段(SLIV字段)中包括如下信息：PDSCH所在slot位置(K 0)；PDSCH所占的OFDM符号长度(L)；PDSCH在相应slot中所占的OFDM符号起始位置(S)。其中，示例性地，一个slot可以包括7个OFDM符号或者14个OFDM符号，每个OFDM符号的实际长度可以根据需求设定，K 0所指示的值表示PDSCH所在slot相对于DCI所在slot的偏移量，例如，K 0＝0表示PDSCH和DCI位于相同的slot内。
在普通的DCI格式(例如上述DCI格式1_0)中，SLIV字段中的S指示的参考起始位置是slot的起始边界(也可以称为时隙slot的起始位置)。然而，在精简的DCI格式中，SLIV字段中的S指示的参考起始位置是相应PDCCH检测时机的起始符号，从而有利于降低DCI开销，增加DCI传输的可靠性。
假设上述K 0＝0，下面结合图2和图3进行示例性说明。普通的DCI格式的示例如图2所示，PDCCH的时域位置可以根据相应SSS中的配置信息(也就是SSS的检测时机)确定，当该DCI被正确检测出来时，终端设备可以确定SLIV字段中的S＝6，S的值表示，PDSCH的起始位置与slot的起始位置相距6个OFDM符号，假设slot起始OFDM符号索引值为0，则PDSCH的起始位置的索引值为6，也就是PDSCH的起始位置是slot中的第 7个OFDM符号。精简的DCI格式的示例如图3所示，当终端设备确定SLIV字段中的S＝4时，S的值表示，PDSCH接收的起始位置与调度该PDSCH的PDCCH检测时机的起始位置相距4个OFDM符号，假设该PDCCH检测时机的起始位置对应的OFDM符号索引值为2，则PDSCH的起始位置的索引值为6，也就是PDSCH的起始位置为slot中的第7个OFDM符号，PDCCH检测时机可以根据相应SSS的配置信息确定。
如上所述，一个SSS可以包括一个或多个PDCCH候选，终端设备在PDCCH候选上进行盲检测，也可以理解为终端设备在SSS中进行盲检测。一个SSS可以关联到一个CORESET，即一个或多个PDCCH候选可以关联一个CORESET。网络设备可以分别通过不同的CORESET发送不同的DCI，终端设备可以在与该CORESET关联的PDCCH候选上独立进行盲检测，获得各自CORESET对应的DCI。上述终端设备通过不同CORESET所获得的DCI是独立的，彼此之间没有关联。
为了增加PDCCH传输的可靠性，在目前的一种方法中，可以将同一DCI的信息比特在多个物理资源(例如CORESET)上重复传输，终端设备可以分别在该多个物理资源上盲检测DCI，并将获得的信息比特进行合并，以提升信息检测的可靠性。示例性地，为了获得信道的分集增益，可以将一个SSS关联到至少两个CORESET，不同的CORESET可以配置不同的TCI状态。网络设备可以在该至少两个CORESET上重复下发DCI，终端设备可以将通过该至少两个CORESET所获得的DCI进行合并，从而获得最终的DCI。但是，由于检测时机是针对SSS配置的，将一个SSS关联到至少两个CORESET，该至少两个CORESET的检测时机是相同的，从而限定了重复发送的DCI的发送时刻是相同的，导致网络设备下发DCI的灵活性较差。有鉴于此，本申请实施例提供了一种数据传输的方法和装置，有利于提高网络设备下发DCI的灵活性，从而提高数据传输效率。
在介绍本申请实施例提供的方法之前，先做出以下几点说明。
第一，在本申请实施例中，“预先定义”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。
第二，在下文示出的实施例中，各术语及英文缩略语，如控制资源集(control resource set，CORESET)、搜索空间集合(search space set，SSS)、PDCCH候选(candidiate)等，均为方便描述而给出的示例性举例，不应对本申请构成任何限定。本申请并不排除在已有或未来的协议中定义其它能够实现相同或相似功能的术语的可能。
第三，在下文示出的实施例中第一、第二以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。例如，区分不同的字段、区分不同的信息等。
第四，本申请实施例中涉及的“协议”可以是指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
第五，“至少一个”是指一个或者多个，“至少两个”和“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和c中的至少一项(个)，可以表示：a，或b，或c，或a和b，或a和c， 或b和c，或a、b和c，其中a，b，c可以是单个，也可以是多个。
下面将结合附图详细说明本申请提供的数据传输的方法和装置。应理解，本申请的技术方案可以应用于无线通信系统中，例如，图1中所示的通信系统100。处于无线通信系统中的两个通信装置之间可具有无线通信连接关系，该两个通信装置中的一个通信装置可对应于图1中所示的终端设备120，如，可以为图1中所示的终端设备，也可以为配置于该终端设备中的芯片；该两个通信装置中的另一个通信装置可对应于图1中所示的网络设备110，如，可以为图1中所示的网络设备，也可以为配置于该网络设备中的芯片。
图4示出了本申请实施例提供的数据传输的方法400的示意性流程图。该方法可以应用于图1所示的通信系统中，但本申请实施例对此不作限定。该方法400包括：
S410，网络设备通过至少两个PDCCH候选中的部分或者全部PDCCH候选发送一个DCI，该DCI用于调度物理共享信道；对应地，终端设备在至少两个物理下行控制信道PDCCH候选上进行盲检测，该至少两个PDCCH候选分别关联不同的控制资源集CORESET，该至少两个PDCCH候选之间存在关联关系。
在本申请实施例中，“PDCCH候选之间存在关联关系”是指：终端设备需要根据具备关联关系的多个PDCCH候选获取一个DCI信令，该DCI信令可以用于调度至少一个PUSCH或者至少一个PDSCH。应理解，上述至少两个PDCCH候选属于不同的SSS。
可选地，上述至少两个PDCCH候选分别关联不同的控制资源集CORESET的一种替代方式是，该至少两个PDCCH候选可以分别关联同一个CORESET中配置的至少两个TCI状态。
S420，终端设备根据在上述至少两个PDCCH候选上进行盲检测的结果，确定一个DCI。
上述盲检测的结果可以是终端设备通过盲检测获取的软信息值、或者调制符号、或者经过解调后的信息比特、或者序列等，本申请实施例对此不作限定。
S430，网络设备根据上述DCI，发送或接收物理共享信道；对应地，终端设备根据上述DCI，接收或发送物理共享信道。
本申请实施例的数据传输方法，通过配置至少两个PDCCH候选之间的关联关系，该至少两个PDCCH候选属于不同的SSS，且令该至少两个PDCCH候选分别关联不同的CORESET，使得具备关联关系的至少两个PDCCH候选可以采用不同的QCL假设接收数据，且该至少两个PDCCH候选对应的不同SSS可以独立配置检测时机，有利于提高网络设备下发DCI的灵活性，且降低终端设备接收DCI的复杂度，从而提高数据传输效率。
这里的物理共享信道可以是物理上行共享信道(physical uplink shared channel，PUSCH)，也可以是物理下行共享信道(physical downlink shared channel，PDSCH)，本申请实施例对此不作限定。若上述物理共享信道为PUSCH，则终端设备可以根据该DCI，发送该PUSCH，网络设备可以根据上述DCI，接收该PUSCH；若上述物理共享信道为PDSCH，则网络设备可以根据该DCI，发送该PDSCH，终端设备可以根据该DCI，接收该PDSCH。
上述至少两个PDCCH候选可以属于不同的SSS，例如，5个PDCCH候选属于2个SSS(包括SSS 1和SSS 2)，其中3个PDCCH候选属于SSS 1，2个PDCCH候选属于SSS 2；又例如，3个PDCCH候选分别属于3个不同的SSS。上述至少两个PDCCH候选 之间存在关联关系也可以理解为至少两个PDCCH对应的SSS之间存在关联关系。同样地，上述至少两个PDCCH候选分别关联不同的CORESET也可以理解为该至少两个PDCCH候选对应的至少两个SSS分别关联不同的CORESET。终端设备可以根据至少两个SSS分别确定至少两个检测时机，再结合SSS关联的CORESET确定检测DCI的物理资源位置。示例性地，SSS 1包括PDCCH候选1，SSS 2包括PDCCH候选2，SSS 1和SSS 2之间存在关联关系，即PDCCH候选1和PDCCH候选2之间存在关联关系，SSS 1可以关联CORESET#1，SSS 2可以关联CORESET#2。终端设备可以根据SSS 1确定检测时机1，根据SSS 2确定检测时机2，进而根据CORESET#1和CORESET#2分别确定检测DCI的物理资源位置。
在本申请实施例中，至少两个PDCCH候选之间存在关联关系，这个关联关系可以是预先约定的，也可以是网络设备通过信令为终端设备配置的，比如网络设备可以通过系统消息、专用RRC消息、MAC层信令、或者物理层信令为终端设备配置，本申请实施例不作限制。例如，若上述关联关系是预先约定的，则网络设备和终端设备可以根据预定义的关联规则，直接确定至少两个PDCCH候选之间的关联关系；若上述关联关系是网络设备配置的，则网络设备可以直接通过信令将PDCCH候选分组，同一组内的PDCCH候选具备关联关系，或者，网络设备也可以配置一种关联规则，以便终端设备通过该关联规则确定至少两个PDCCH候选之间的关系。但应理解，至少两个PDCCH候选之间存在关联关系，仅仅表示该至少两个PDCCH候选上发送的信息比特是同一个DCI的，并不意味着网络设备一定会通过该至少两个PDCCH候选上发送DCI。对于网络设备而言，网络设备可以在具有关联关系的至少两个PDCCH候选中的一个或多个PDCCH候选上发送DCI；对于终端设备而言，终端设备要在具有关联关系的至少两个PDCCH候选上进行盲检测，根据在至少两个PDCCH候选上进行盲检测的结果，确定一个DCI。换句话说，具有关联关系的PDCCH候选上的信息比特也具有关联关系，用于终端设备确定一个DCI。
具体而言，至少两个PDCCH候选之间存在关联关系，表示在至少两个PDCCH候选上执行盲检测获取的信息比特之间存在关联，或者，在至少两个PDCCH候选上执行的盲检测操作之间存在关联。
在本申请实施例中，具有关联关系的所有PDCCH候选上的信息比特组成或包括上述DCI的全部信息比特。
在第一种可能的实现方式中，上述至少两个PDCCH候选上的信息比特分别包括上述一个DCI的全部信息比特。例如，一个DCI信令包括X个比特，X为正整数，该X个比特可以是序列，或者是经过编码调制后的调制符号等，该X个比特可以经过相同或者不同的编码调制方式，至少两个PDCCH候选中的每个PDCCH候选上均会承载该X个比特。终端设备可以在至少两个PDCCH候选上分别接收信息比特，并分别执行最大似然检测和软判决，将获得的两份软信息比特进行软合并，从而获得最终的DCI。本实施例在软合并过程中能够提升正确检测概率，进而提升DCI检测的可靠性，此外，两份DCI信息分别经历相关性较低的信道传输，可以增加软合并操作的增益，鲁棒性更好。
在第二种可能的实现方式，上述至少两个PDCCH候选上的信息比特分别包括上述一个DCI的部分信息比特。这里的部分信息比特可以是一个DCI信令的信息比特的任意一部分。对于两个PDCCH候选而言，即至少两个PDCCH候选为PDCCH候选1和PDCCH 候选2，例如，网络设备可以将一个DCI信令比特串经过编码调制后的调制符号中的一部分调制符号承载于PDCCH候选1上，除该部分调制符号之外的其余调制符号承载于PDCCH候选2上。又例如，网络设备可以将一个DCI信令比特串中的一部分比特串经过独立的编码调制后形成的调制符号承载于PDCCH候选1上，除该部分比特串之外的其余部分比特串经过独立的编码调制后形成的调制符号承载于PDCCH候选2上。示例性地，网络设备可以通过PDCCH候选1传输一个DCI信令的前10比特，通过PDCCH候选2传输该DCI信令的后20比特。换句话说，网络设备可以将一个DCI信令的信息比特承载于至少两个CORESET上，通过不同的TRP发送承载于不同CORESET上的信号，终端设备可以在至少两个PDCCH候选上分别接收信息比特，并各自执行检测，根据获取的至少两份信息获得最终的DCI。本实施例可以理解为，AL较小的至少两个PDCCH候选可以聚合形成一个AL较大的PDCCH候选，例如，AL＝4的两个PDCCH候选可以形成一个AL＝8的PDCCH候选。本实施例的DCI信令在传输过程中经历的信道相关性比较低，具备分集增益，与上述第一种可能的实现方式相比，终端设备的盲检测复杂度较低。
具体采用上述两种可能的实现方式中的哪种实现方式，可以是预先约定的，也可以是网络设备通过信令为终端设备配置的，比如网络设备可以通过系统消息、专用RRC消息、MAC层信令、或者物理层信令为终端设备配置，本申请实施例不作限制。
应理解，上述终端设备通过至少两个PDCCH候选获取一个DCI信令的过程可以包括多种实现方式，例如，终端设备可以先进行译码，在对译码后的信息比特进行合并；终端设备也可以先将检测到的信息进行合并，再进行译码获得最终的信息比特，本申请实施例对此不作限定。
由于PDCCH候选是属于SSS的，至少两个PDCCH候选之间的关联关系本质上也可以理解为不同的SSS中PDCCH候选之间的关联关系。例如，可以配置或约定SSS 1的PDCCH候选与SSS 2的PDCCH候选之间具有关联关系。进一步地，可以配置或约定SSS 1的一个或多个PDCCH候选与SSS 2的一个或多个PDCCH候选之间具有关联关系。下面结合图5至图7，详细介绍上述至少两个PDCCH候选之间的关联关系。
在一种可能的实现方式中，至少两个PDCCH候选具有相同的AL和相同的编号。即可以预先约定相同AL下相同编号的PDCCH候选具有关联关系。这里的编号是AL级别的，即在同一SSS中的同一AL内对PDCCH候选进行编号。示例性地，相同AL下不同编号的PDCCH候选可以包括不重叠的时频资源单元，例如CCE。在本实施例中，终端设备执行盲检测之后，可以将相同AL下相同编号的PDCCH候选对应的信息比特进行软合并操作或者译码后的信息比特合并的操作。应理解，对于没有关联关系的PDCCH候选，则不属于上述至少两个PDCCH候选，该终端设备可以对其独立执行盲检测操作，例如解析、译码等。
以两个SSS为例，如图5所示，SSS 1中AL＝2的PDCCH候选1和SSS 2中AL＝2的PDCCH候选1具有关联关系，SSS 1中AL＝2的PDCCH候选2和SSS 2中AL＝2的PDCCH候选2具有关联关系，SSS 1中AL＝4的PDCCH候选1和SSS 2中AL＝4的PDCCH候选1具有关联关系，SSS 1中AL＝8的PDCCH候选1和SSS 2中AL＝8的PDCCH候选1具有关联关系，SSS 1中AL＝8的PDCCH候选2和SSS 2中AL＝8的PDCCH候选2具有关联关系。终端设备可以对在上述具有关联关系的PDCCH候选上的盲检测结果进行合 并处理。在图5中，由于SSS 2中AL＝4下只包括PDCCH候选1，按照上述规则，SSS 1中的AL＝4的PDCCH候选2没有与其具有关联关系的PDCCH候选，终端设备可以该SSS 1中的AL＝4的PDCCH候选2独立执行盲检测。
在本申请实施例中，终端设备对相同AL下的PDCCH候选执行软合并操作，可以降低终端设备的处理复杂度，此外，PDCCH候选之间的关联关系可以是一对一的，或者是不同SSS中仅有部分PDCCH候选之间存在关联关系，这样可以进一步降低终端设备的处理复杂度。
在另一种可能的实现方式中，至少两个PDCCH候选具有不同的AL和相同的编号。即特定AL(预定义或配置的)下相同编号的PDCCH候选具有关联关系。上述编号是AL级别的，即在同一SSS中的同一AL内对PDCCH候选进行编号。上述不同的AL可以是预先约定的或者网络设备配置的。在本实施例中，终端设备执行盲检测之后，可以将特定AL(预定义或配置的)下相同编号的PDCCH候选对应的信息比特进行软合并操作或者译码后的信息比特合并的操作。应理解，对于没有关联关系的PDCCH候选，则不属于上述至少两个PDCCH候选，该终端设备可以对其独立执行盲检测操作，例如解析、译码等。
特定AL(预定义或配置的)下相同编号的PDCCH候选具有关联关系，可以分为下列两种情况：
情况1、AL与AL之间是一对一的关系，即一个AL的PDCCH候选与另一个AL PDCCH候选之间具有关联关系。
以两个SSS为例，如图6所示，SSS 1中AL＝2的PDCCH候选1和SSS 2中AL＝4的PDCCH候选1具有关联关系，SSS 1中AL＝2的PDCCH候选2和SSS 2中AL＝4的PDCCH候选2具有关联关系，SSS 1中AL＝4的PDCCH候选1和SSS 2中AL＝2的PDCCH候选1具有关联关系，SSS 1中AL＝8的PDCCH候选1和SSS 2中AL＝8的PDCCH候选1具有关联关系，SSS 1中AL＝8的PDCCH候选2和SSS 2中AL＝8的PDCCH候选2具有关联关系。终端设备可以对在上述具有关联关系的PDCCH候选上的盲检测结果进行合并处理。在图6中，由于SSS 2中AL＝2下只包括PDCCH候选1，按照上述规则，SSS 1中的AL＝4的PDCCH候选2没有与其具有关联关系的PDCCH候选，终端设备可以该SSS 1中的AL＝4的PDCCH候选2独立执行盲检测。
在本申请实施例中，由于不同TRP的信道不同，通过配置具有关联关系的至少两个PDCCH候选具有不同的AL，可以根据信道条件给不同TRP配置不同的AL发送DCI，灵活性较高，此外，PDCCH候选之间的关联关系是一对一的，这样可以进一步降低终端设备的处理复杂度。
情况2、AL与AL之间的一对多的关系，即一个AL的PDCCH候选与至少两个AL的PDCCH候选之间具有关联关系。
以两个SSS为例，如图7所示，SSS 1中AL＝2的PDCCH候选1和SSS 2中AL＝2的PDCCH候选1、SSS 2中AL＝4的PDCCH候选1具有关联关系，SSS 1中AL＝2的PDCCH候选2和SSS 2中AL＝2的PDCCH候选2、SSS 2中AL＝4的PDCCH候选2具有关联关系，SSS 1中AL＝4的PDCCH候选1和SSS 2中AL＝4的PDCCH候选1具有关联关系，SSS 1中AL＝4的PDCCH候选2和SSS 2中AL＝4的PDCCH候选2具有关联关系，SSS 1中AL＝8的PDCCH候选1和SSS 2中AL＝8的PDCCH候选1具有关联关系，SSS 1中 AL＝8的PDCCH候选2和SSS 2中AL＝8的PDCCH候选2具有关联关系。终端设备可以对在上述具有关联关系的PDCCH候选上的盲检测结果进行合并处理。
在本申请实施例中，由于不同TRP的信道不同，通过配置具有关联关系的至少两个PDCCH候选具有不同的AL，可以根据信道条件给不同TRP配置不同的AL发送DCI，提高网络设备下发DCI的灵活性。
考虑到上述精简的DCI格式中，S所指示的参考位置是PDCCH检测时机的起始符号，当网络设备通过上述不同的CORESET重复传输DCI，且按照精简的DCI格式传输时，DCI中S所指示的参考位置可能有多个，且，由于重复传输的DCI包括的原始比特相同，重复传输的DCI会指示相同的S值。若至少两个SSS内的DCI均被终端设备正确接收，则终端设备根据不同的参考位置可能确定出不同的物理共享信道的起始位置；若至少两个SSS内的DCI仅有一个被终端设备正确接收，则正确接收一个SSS中的DCI和正确接收另一个SSS中的DCI时终端设备确定的物理共享信道的起始位置不同，但网络设备仅会确定一个物理共享信道位置，这样会导致终端设备和网络设备对于物理共享信道的起始位置理解不一致，影响数据接收效率。
因此，可选地，在网络设备在至少两个物理下行控制信道PDCCH候选上发送下行控制信息DCI之前，该方法还包括：网络设备确定参考位置，该参考位置是根据至少两个CORESET中的至少一个CORESET或该至少两个PDCCH候选中的至少一个PDCCH候选确定的；网络设备基于该参考位置，确定物理共享信道的起始位置；相应地，终端设备确定参考位置；终端设备基于该参考位置，确定物理共享信道的起始位置。网络设备根据该DCI，发送或接收物理共享信道，包括：网络设备基于该起始位置，发送或接收物理共享信道；终端设备根据该DCI，接收或发送物理共享信道，包括：终端设备基于物理共享信道的起始位置，接收或发送物理共享信道。
上述参考位置可以是根据存在关联关系的至少两个SSS中的至少一个SSS确定的，或者根据存在关联关系的至少两个PDCCH候选中的至少一个PDCCH候选确定的。具体地，网络设备和终端设备可以按照约定规则，通过协议约定的方式确定上述参考位置，从而确定物理共享信道的起始位置。
在本申请实施例中，网络设备采用以PDCCH检测时机起始位置作为参考位置指示S的DCI格式时，终端设备可以按照约定规则确定实际的物理共享信道的起始位置，保证与网络设备下发物理共享信道的实际起始位置一致，有利于提高物理共享信道的检测和接收的效率。
在一种可能的实现方式中，上述参考位置是根据上述至少两个CORESET中的一个CORESET或该至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。因此，网络设备和终端设备可以基于这一个参考位置，确定物理共享信道的起始位置。
可选地，网络设备基于物理共享信道的起始位置，发送或接收物理共享信道，包括：网络设备基于该参考位置，确定该DCI中的第一字段以及物理共享信道的起始位置；终端设备基于参考位置，确定物理共享信道的起始位置，包括：终端设备基于一个参考位置和该DCI中的第一字段，确定物理共享信道的起始位置，该第一字段用于指示物理共享信道的起始位置相对于该参考位置的偏移。
在本申请实施例中，DCI是精简的DCI格式，终端设备仅确定一个参考位置。具体而 言，协议约定采用特定的某个SSS的检测时机的起始位置作为参考位置，网络设备可以根据该规则确定至少两个具有关联关系的SSS中下发的DCI中的第一字段和物理共享信道的实际位置。终端设备可以根据该规则确定一个参考位置，结合该参考位置和盲检测获得的DCI中的第一字段，确定物理共享信道的起始位置。这里的第一字段可以为上述S所在的字段(即SLIV字段)。
示例性地，可以约定至少两个CORESET中编号最大的或者编号最小的CORESET对应的SSS的检测时机的起始符号位置为上述参考位置。
示例性地，可以约定至少两个PDCCH候选中编号最大的或者编号最小的PDCCH候选对应的SSS的检测时机的起始符号位置为上述参考位置。
示例性地，可以约定至少两个SSS中编号最大的或者编号最小的SSS的检测时机的起始符号位置为上述参考位置。
示例性地，可以约定至少两个PDCCH候选中时域位置最靠前的或者时域位置最靠后的PDCCH候选对应的SSS的检测时机的起始符号位置为上述参考位置。
应理解，上述编号最大或编号最小仅仅是一种示例，并不应对本申请实施例的保护范围造成限定，在其他可能的实现方式中，可以将至少两个CORESET(或者至少两个PDCCH候选，或者至少两个SSS)中编号处于中间、或者倒数第二大、或者倒数第二小的CORESET(或者至少两个PDCCH候选，或者至少两个SSS)对应的SSS的检测时机的起始符号位置作为上述参考位置，本申请实施例对此不作限定。
还应理解，本申请实施例的后续示例均假设K 0＝0，即物理共享信道和DCI位于相同的slot内，在实际应用中，终端设备还需要结合上述参考位置、第一字段以及K 0，确定物理共享信道的起始位置，此处不再赘述。
以物理共享信道为PDSCH为例，图8示出了一种PDSCH的起始位置的示意图。在图8中，SSS 1和SSS 2具备关联关系，假设协议约定将编号最小的SSS的检测时机的起始符号作为参考位置。由于SSS 1为两个具备关联关系的SSS中编号最小的SSS，网络设备可以根据SSS 1的检测时机确定SSS 1和SSS 2中DCI的S，则SSS 1和SSS 2中的DCI均会指示相同的S值，例如S＝6，并根据SSS 1的检测时机的起始位置和S＝6确定PDSCH的起始位置。终端设备可以根据上述规则以及检测出的DCI中的S值，确定PDSCH的实际位置。假设在图8中，即使终端设备仅在SSS 2中检测到DCI且其中的S＝6，终端设备可以确定PDSCH的起始位置仍然以SSS 1对应的检测时机的起始位置作为参考，从而确定出来的PDSCH的起始位置是6。
在图8中，假设协议约定将编号最大的SSS的检测时机的起始符号作为参考位置。由于SSS 2为两个具备关联关系的SSS中编号最大的SSS，网络设备可以根据SSS 2的检测时机确定SSS 1和SSS 2中DCI的S，则SSS 1和SSS 2中的DCI均会指示相同的S值，例如S＝4，并根据SSS 2的检测时机的起始位置和S＝4确定PDSCH的起始位置。终端设备可以根据上述规则以及检测出的DCI中的S值，确定PDSCH的实际位置。假设在图8中，即使终端设备仅在SSS 1中检测到DCI且其中的S＝4，终端设备可以确定PDSCH的起始位置仍然以SSS 2对应的检测时机的起始位置作为参考，从而确定出来的PDSCH的起始位置是6。
本申请实施例可以理解为将至少两个SSS作为一个整体，这个整体有一个检测时机， 即将这个整体的检测时机的起始位置作为参考位置。通过协议约定具有关联关系的SSS中编号最小的SSS对应的检测时机的起始位置作为参考位置，可以避免终端设备在错误的时间接收PDSCH，从而提高数据接收效率。
在另一种可能的实现方式中，上述参考位置是根据至少两个CORESET或至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。因此，网络设备和终端设备可以基于该至少两个参考位置，确定物理共享信道的起始位置。
可选地，网络设备基于物理共享信道的起始位置，发送或接收物理共享信道，包括：网络设备基于该至少两个参考位置，确定该DCI中的第一字段以及至少两个起始位置；终端设备基于参考位置，确定物理共享信道的起始位置，包括：终端设备基于至少两个参考位置和该DCI中的第一字段，确定至少两个起始位置，该第一字段用于指示该至少两个起始位置相对于该至少两个参考位置的偏移。
在本申请实施例中，DCI是精简的DCI格式，终端设备可以确定至少两个参考位置，即针对每个CORESET或每个PDCCH候选，确定一个参考位置。具体而言，网络设备可以在至少两个SSS上下发DCI的原始比特相同，终端设备可以根据至少两个SSS对应的检测时机分别确定出至少两个参考位置，则终端设备可以根据该至少两个参考位置以及盲检测获得的DCI中的第一字段，确定出至少两个起始位置，从而在该至少两个起始位置上接收或发送至少两个物理共享信道。这里的第一字段可以为上述S所在的字段(即SLIV字段)。
可选地，上述至少两个物理共享信道是同一个传输块(Transmission block，TB)的至少两次重复传输，意味着终端设备可以基于该至少两个物理共享信道接收到的软信息进行合并，从而提升物理共享信道的传输可靠性。
可选地，上述两次重复传输所占的频域资源均可以根据同一个DCI信令的指示确定，即两次重复传输所占的频域资源相同，或者，还可以预先配置或预定义第二次重复传输相对第一次重复传输的频域间隔，从而使得两次重复传输占用不同的频域资源，提升传输的频率分集增益。
可选地，上述两次重复传输所采用的QCL假设不同。一种实现方式是，上述两次重复传输所采用的QCL假设分别与调度该重复传输的上述两个CORESET所采用的QCL假设相同。
以物理共享信道为PDSCH为例，图9示出了本申请实施例的另一PDSCH的起始位置的示意图。在图9中，SSS 1和SSS 2具备关联关系，网络设备分别通过SSS 1和SSS 2对应的CORESET#1和CORESET#2重复传输DCI，由于重复传输的DCI包括的原始比特相同，重复传输的DCI的S＝6。终端设备接收重复传输的DCI，根据SSS 1的检测时机可以确定参考位置1，根据SSS 2的检测时机可以确定参考位置2，再结合S＝6，确定图中所示的两个起始位置：PDSCH 1的起始位置和PDSCH 2的起始位置，从而在对应的位置上分别接收PDSCH 1和PDSCH 2，终端设备可以将PDSCH 1和PDSCH 2进行合并，获得最终的PDSCH。
作为一个可选的实施例，上述第一字段用于指示至少两个S值(也可以称为至少两个第二字段)，该至少两个S值分别与至少两个CORESET或至少两个PDCCH候选具有对应关系，该至少两个S值分别用于指示至少两个起始位置分别相对于至少两个参考位置的 偏移；网络设备基于该至少两个参考位置，确定该DCI中的第一字段以及至少两个起始位置，包括：网络设备基于该至少两个参考位置，确定该至少两个S值以及该至少两个起始位置；终端设备基于该至少两个参考位置和该DCI中的第一字段，确定至少两个起始位置，包括：终端设备基于该至少两个参考位置和该至少两个S值，确定该至少两个起始位置。
在本申请实施例中，第一字段所指示的S值的数量是根据具有关联关系的CORESET(或者SSS)的数量确定的。终端设备可以分别根据至少两个参考位置以及对应的至少两个S值，确定对应的起始位置。示例性地，在上述图9中，假设第一字段包括S＝8和S＝11两个值，其中S＝8对应SSS 1，S＝11对应SSS 2，则终端设备可以基于上述参考位置1和S＝8，确定SSS 1中的DCI所调度的PDSCH 1的起始位置，基于上述参考位置2和S＝11，确定SSS 2中的DCI所调度的PDSCH 2的起始位置。
本申请实施例可以根据多个具备关联关系的SSS确定多个检测时机，从而确定多个起始位置，从而基于该多个起始位置重复传输多个物理共享信道，提高物理共享信道的传输可靠性。
作为一个可选的实施例，上述至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
在本申请实施例中，多个具备关联关系的SSS对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠，这样，终端设备无论将哪个SSS对应的检测时机作为参考位置，都可以获得相同的物理共享信道的起始位置，即不会存在网络设备仅发送了一个物理共享信道，但终端设备确定出至少两个不同的起始位置的情况，终端设备和网络设备对于物理共享信道的起始位置理解一致，提高了物理共享信道的传输效率。
以物理共享信道为PDSCH为例，图10示出了本申请实施例的又一PDSCH的起始位置的示意图。假设SSS 1和SSS 2具备关联关系，则协议约定SSS 1和SSS 2配置的检测时机的起始位置完全相同，则分别在两个SSS上下发的DCI均可以指示相同的S值(假设S＝6)，终端设备和网络设备对PDSCH的传输的起始位置不会产生歧义。
本申请实施例通过限定多个具备关联关系的SSS的检测时机的起始位置相同、结束符号位置相同、或者检测时间完全重叠，在增加了PDCCH检测的可靠性和时延的基础上，确保终端设备获知正确的物理共享信道的起始位置，提高了物理共享信道的传输效率。
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。
上文中结合图1至图10，详细描述了根据本申请实施例的数据传输的方法，下面将结合图11至图12，详细描述根据本申请实施例的数据传输的装置。
图11示出了本申请实施例提供的数据传输的装置1100。在一种设计中，该装置1100可以是终端设备，也可以是终端设备中的芯片。在另一种设计中，该装置1100可以是网络设备，也可以是网络设备中的芯片。该装置1100包括：收发单元1110和处理单元1120。
在一种可能的实现方式中，装置1100用于执行上述方法实施例中终端设备对应的各个流程和步骤。
该收发单元1110用于：用于在至少两个物理下行控制信道PDCCH候选上进行盲检测，至少两个PDCCH候选分别关联不同的控制资源集CORESET，至少两个PDCCH候选之间存在关联关系；该处理单元1120用于：用于根据在至少两个PDCCH候选上进行 盲检测的结果，确定一个下行控制信息DCI，该DCI用于调度物理共享信道；上述收发单元1110还用于：根据该DCI，接收或发送物理共享信道。
可选地，至少两个PDCCH候选上的信息比特分别包括该DCI的全部信息比特；或者，至少两个PDCCH候选上的信息比特分别包括该DCI的部分信息比特。
可选地，至少两个PDCCH候选具有相同的聚合级别AL和相同的编号；或者，至少两个PDCCH候选具有不同的AL和相同的编号。
可选地，该处理单元1120还用于：确定参考位置，该参考位置是根据至少两个CORESET中的至少一个CORESET或至少两个PDCCH候选中的至少一个PDCCH候选确定的；基于该参考位置，确定物理共享信道的起始位置；该收发单元1110具体用于：基于物理共享信道的起始位置，接收或发送物理共享信道。
可选地，该参考位置是根据该至少两个CORESET中的一个CORESET或该至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。
可选地，该处理单元1120具体用于：基于一个参考位置和该DCI中的第一字段，确定物理共享信道的起始位置，该第一字段用于指示物理共享信道的起始位置相对于该参考位置的偏移。
可选地，该参考位置是根据至少两个CORESET或至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。
可选地，该处理单元1120具体用于：基于至少两个参考位置和该DCI中的第一字段，确定至少两个起始位置，该第一字段用于指示该至少两个起始位置相对于该至少两个参考位置的偏移。
可选地，该第一字段包括至少两个第二字段，该至少两个第二字段与至少两个CORESET或至少两个PDCCH候选具有对应关系，该至少两个第二字段分别用于指示该至少两个起始位置相对于该至少两个参考位置的偏移；该处理单元1120具体用于：基于该至少两个参考位置和该至少两个第二字段，确定该至少两个起始位置。
可选地，至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
在另一种可能的实现方式中，装置1100用于执行上述方法实施例中网络设备对应的各个流程和步骤。
该处理单元1120用于：用于确定在至少两个物理下行控制信道PDCCH候选上发送一个下行控制信息DCI，该DCI用于调度物理共享信道，该至少两个PDCCH候选分别关联不同的控制资源集CORESET，该至少两个PDCCH候选之间存在关联关系；该收发单元1110用于：在该至少两个PDCCH候选上发送该DCI；以及，根据该DCI，发送或接收物理共享信道。
可选地，至少两个PDCCH候选上的信息比特分别包括该DCI的全部信息比特；或者，至少两个PDCCH候选上的信息比特分别包括该DCI的部分信息比特。
可选地，至少两个PDCCH候选具有相同的聚合级别AL和相同的编号；或者，至少两个PDCCH候选具有不同的AL和相同的编号。
可选地，该处理单元1120还用于：确定参考位置，该参考位置是根据至少两个CORESET中的至少一个CORESET或至少两个PDCCH候选中的至少一个PDCCH候选 确定的；基于该参考位置，确定物理共享信道的起始位置；该收发单元1110具体用于：基于物理共享信道的起始位置，发送或接收物理共享信道。
可选地，该参考位置是根据至少两个CORESET中的一个CORESET或至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。
可选地，该处理单元1120具体用于：基于该参考位置，确定该DCI中的第一字段以及物理共享信道的起始位置，该第一字段用于指示物理共享信道的起始位置相对于该参考位置的偏移。
可选地，该参考位置是根据至少两个CORESET或至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。
可选地，该处理单元1120具体用于：基于该至少两个参考位置，确定该DCI中的第一字段以及至少两个起始位置，该第一字段用于指示该至少两个起始位置相对于该至少两个参考位置的偏移。
可选地，该第一字段包括至少两个第二字段，该至少两个第二字段与至少两个CORESET或至少两个PDCCH候选具有对应关系，该至少两个第二字段分别用于指示该至少两个起始位置相对于该至少两个参考位置的偏移；该处理单元1120具体用于：基于该至少两个参考位置，确定该至少两个字段以及该至少两个起始位置。
可选地，该至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
应理解，这里的装置1100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1100可以具体为上述实施例中的终端设备或网络设备，装置1100可以用于执行上述方法实施例中与终端设备或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1100具有实现上述方法中终端设备或网络设备执行的相应步骤的功能；上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。该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，上述收发单元1110可以包括发送单元和接收单元，该发送单元可以用于实现上述收发单元对应的用于执行发送动作的各个步骤和/或流程，该接收单元可以用于实现上述收发单元对应的用于执行接收动作的各个步骤和/或流程。该发送单元可以由发射器替代，该接收单元可以由接收器替代，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。
在本申请的实施例，图11中的装置1100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，收发单元1110可以是该芯片的收发电路，在此不做限定。
图12示出了本申请实施例提供的另一数据传输的装置1200。该装置1200包括处理器1210、收发器1220和存储器1230。其中，处理器1210、收发器1220和存储器1230通过内部连接通路互相通信，该存储器1230用于存储指令，该处理器1210用于执行该存储器1230存储的指令，以控制该收发器1220发送信号和/或接收信号。
在一种可能的实现方式中，装置1200用于执行上述方法200中终端设备对应的各个流程和步骤。
其中，该收发器1220用于：在至少两个物理下行控制信道PDCCH候选上进行盲检测，至少两个PDCCH候选分别关联不同的控制资源集CORESET，至少两个PDCCH候选之间存在关联关系；该处理器1210用于：根据在该至少两个PDCCH候选上进行盲检测的结果，确定一个下行控制信息DCI，该DCI用于调度物理共享信道；该收发器1220还用于：根据该DCI，接收或发送物理共享信道。
在另一种可能的实现方式中，装置1200用于执行上述方法200中网络设备对应的各个流程和步骤。
其中，该处理器1210用于：确定在至少两个物理下行控制信道PDCCH候选上发送一个下行控制信息DCI，该DCI用于调度物理共享信道，至少两个PDCCH候选分别关联不同的控制资源集CORESET，至少两个PDCCH候选之间存在关联关系；该收发器1220用于：在至少两个PDCCH候选上发送该DCI；以及，根据该DCI，发送或接收物理共享信道。
应理解，装置1200可以具体为上述实施例中的终端设备或网络设备，并且可以用于执行上述方法实施例中与终端设备或网络设备对应的各个步骤和/或流程。可选地，该存储器1230可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器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。该处理器1210可以用于执行存储器中存储的指令，并且当该处理器1210执行存储器中存储的指令时，该处理器1210用于执行上述与该终端设备或网络设备对应的方法实施例的各个步骤和/或流程。该收发器1220可以包括发射器和接收器，该发射器可以用于实现上述收发器对应的用于执行发送动作的各个步骤和/或流程，该接收器可以用于实现上述收发器对应的用于执行接收动作的各个步骤和/或流程。
应理解，在本申请实施例中，上述装置的处理器可以是中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。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单元组合执行完成。软件单元可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器执行存储器中的指令，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
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。
本申请实施还提供了一种通信系统，该通信系统可以包括上述图11或图12所示的终端设备(装置1100或装置1200体现为终端设备)，以及上述图11或图12所示的网络设备(装置1100或装置1200体现为网络设备)。
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，上述单元的划分，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。
上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。
上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 (43)

  1. 一种数据传输的方法，其特征在于，包括：
    在至少两个物理下行控制信道PDCCH候选上进行盲检测，所述至少两个PDCCH候选分别关联不同的控制资源集CORESET，所述至少两个PDCCH候选之间存在关联关系；
    根据在所述至少两个PDCCH候选上进行盲检测的结果，确定一个下行控制信息DCI，所述DCI用于调度物理共享信道；
    根据所述DCI，接收或发送所述物理共享信道。
  2. 根据权利要求1所述的方法，其特征在于，所述至少两个PDCCH候选上的信息比特分别包括所述DCI的全部信息比特；或者，
    所述至少两个PDCCH候选上的信息比特分别包括所述DCI的部分信息比特。
  3. 根据权利要求1或2所述的方法，其特征在于，所述至少两个PDCCH候选具有相同的聚合级别AL和相同的编号；或者，
    所述至少两个PDCCH候选具有不同的AL和相同的编号。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，在根据所述DCI，接收或发送所述物理共享信道之前，所述方法还包括：
    确定参考位置，所述参考位置是根据至少两个CORESET中的至少一个CORESET或所述至少两个PDCCH候选中的至少一个PDCCH候选确定的；
    基于所述参考位置，确定所述物理共享信道的起始位置；
    所述根据所述DCI，接收或发送所述物理共享信道，包括：
    基于所述起始位置，接收或发送所述物理共享信道。
  5. 根据权利要求4所述的方法，其特征在于，所述参考位置是根据所述至少两个CORESET中的一个CORESET或所述至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。
  6. 根据权利要求5所述的方法，其特征在于，所述基于所述参考位置，确定所述物理共享信道的起始位置，包括：
    基于所述一个参考位置和所述DCI中的第一字段，确定所述起始位置，所述第一字段用于指示所述起始位置相对于所述参考位置的偏移。
  7. 根据权利要求4所述的方法，其特征在于，所述参考位置是根据所述至少两个CORESET或所述至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。
  8. 根据权利要求7所述的方法，其特征在于，所述基于所述参考位置，确定所述物理共享信道的起始位置，包括：
    基于所述至少两个参考位置和所述DCI中的第一字段，确定至少两个起始位置，所述第一字段用于指示所述至少两个起始位置相对于所述至少两个参考位置的偏移。
  9. 根据权利要求8所述的方法，其特征在于，所述第一字段包括至少两个第二字段，所述至少两个第二字段与所述至少两个CORESET或所述至少两个PDCCH候选具有对应关系，所述至少两个第二字段分别用于指示所述至少两个起始位置相对于所述至少两个参 考位置的偏移；
    所述基于所述至少两个参考位置和所述DCI中的第一字段，确定至少两个起始位置，包括：
    基于所述至少两个参考位置和所述至少两个第二字段，确定所述至少两个起始位置。
  10. 根据权利要求1至9中任一项所述的方法，其特征在于，所述至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
  11. 一种数据传输的方法，其特征在于，包括：
    在至少两个物理下行控制信道PDCCH候选上发送下行控制信息DCI，所述DCI用于调度物理共享信道，所述至少两个PDCCH候选分别关联不同的控制资源集CORESET，所述至少两个PDCCH候选之间存在关联关系；
    根据所述DCI，发送或接收所述物理共享信道。
  12. 根据权利要求11所述的方法，其特征在于，所述至少两个PDCCH候选上的信息比特分别包括所述DCI的全部信息比特；或者，
    所述至少两个PDCCH候选上的信息比特分别包括所述DCI的部分信息比特。
  13. 根据权利要求11或12所述的方法，其特征在于，所述至少两个PDCCH候选具有相同的聚合级别AL和相同的编号；或者，
    所述至少两个PDCCH候选具有不同的AL和相同的编号。
  14. 根据权利要求11至13中任一项所述的方法，其特征在于，所述方法还包括：
    确定参考位置，所述参考位置是根据至少两个CORESET中的至少一个CORESET或所述至少两个PDCCH候选中的至少一个PDCCH候选确定的；
    基于所述参考位置，确定所述物理共享信道的起始位置；
    所述根据所述DCI，发送或接收所述物理共享信道，包括：
    基于所述起始位置，发送或接收所述物理共享信道。
  15. 根据权利要求14所述的方法，其特征在于，所述参考位置是根据所述至少两个CORESET中的一个CORESET或所述至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。
  16. 根据权利要求15所述的方法，其特征在于，所述基于所述物理共享信道的起始位置，发送或接收所述物理共享信道，包括：
    基于所述参考位置，确定所述DCI中的第一字段以及所述起始位置，所述第一字段用于指示所述起始位置相对于所述参考位置的偏移。
  17. 根据权利要求14所述的方法，其特征在于，所述参考位置是根据所述至少两个CORESET或所述至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。
  18. 根据权利要求17所述的方法，其特征在于，所述基于所述物理共享信道的起始位置，发送或接收所述物理共享信道，包括：
    基于所述至少两个参考位置，确定所述DCI中的第一字段以及至少两个起始位置，所述第一字段用于指示所述至少两个起始位置相对于所述至少两个参考位置的偏移。
  19. 根据权利要求18所述的方法，其特征在于，所述第一字段包括至少两个第二字段，所述至少两个第二字段与所述至少两个CORESET或所述至少两个PDCCH候选具有 对应关系，所述至少两个第二字段分别用于指示所述至少两个起始位置相对于所述至少两个参考位置的偏移；
    所述基于所述至少两个参考位置，确定所述DCI中的第一字段以及至少两个起始位置，包括：
    基于所述至少两个参考位置，确定所述至少两个字段以及所述至少两个起始位置。
  20. 根据权利要求11至19任一项所述的方法，其特征在于，所述至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
  21. 一种数据传输的装置，其特征在于，包括：
    收发单元，用于在至少两个物理下行控制信道PDCCH候选上进行盲检测，所述至少两个PDCCH候选分别关联不同的控制资源集CORESET，所述至少两个PDCCH候选之间存在关联关系；
    处理单元，用于根据在所述至少两个PDCCH候选上进行盲检测的结果，确定一个下行控制信息DCI，所述DCI用于调度物理共享信道；
    所述收发单元还用于：根据所述DCI，接收或发送所述物理共享信道。
  22. 根据权利要求21所述的装置，其特征在于，所述至少两个PDCCH候选上的信息比特分别包括所述DCI的全部信息比特；或者，
    所述至少两个PDCCH候选上的信息比特分别包括所述DCI的部分信息比特。
  23. 根据权利要求21或22所述的装置，其特征在于，所述至少两个PDCCH候选具有相同的聚合级别AL和相同的编号；或者，
    所述至少两个PDCCH候选具有不同的AL和相同的编号。
  24. 根据权利要求21至23中任一项所述的装置，其特征在于，所述处理单元还用于：
    确定参考位置，所述参考位置是根据至少两个CORESET中的至少一个CORESET或所述至少两个PDCCH候选中的至少一个PDCCH候选确定的；
    基于所述参考位置，确定所述物理共享信道的起始位置；
    所述收发单元具体用于：
    基于所述起始位置，接收或发送所述物理共享信道。
  25. 根据权利要求24所述的装置，其特征在于，所述参考位置是根据所述至少两个CORESET中的一个CORESET或所述至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。
  26. 根据权利要求25所述的装置，其特征在于，所述处理单元具体用于：
    基于所述一个参考位置和所述DCI中的第一字段，确定所述起始位置，所述第一字段用于指示所述起始位置相对于所述参考位置的偏移。
  27. 根据权利要求24所述的装置，其特征在于，所述参考位置是根据所述至少两个CORESET或所述至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。
  28. 根据权利要求27所述的装置，其特征在于，所述处理单元具体用于：
    基于所述至少两个参考位置和所述DCI中的第一字段，确定至少两个起始位置，所述第一字段用于指示所述至少两个起始位置相对于所述至少两个参考位置的偏移。
  29. 根据权利要求28所述的装置，其特征在于，所述第一字段包括至少两个第二字 段，所述至少两个第二字段与所述至少两个CORESET或所述至少两个PDCCH候选具有对应关系，所述至少两个第二字段分别用于指示所述至少两个起始位置相对于所述至少两个参考位置的偏移；
    所述处理单元具体用于：
    基于所述至少两个参考位置和所述至少两个第二字段，确定所述至少两个起始位置。
  30. 根据权利要求21至29中任一项所述的装置，其特征在于，所述至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
  31. 一种数据传输的装置，其特征在于，包括：
    处理单元，用于确定在至少两个物理下行控制信道PDCCH候选上发送一个下行控制信息DCI，所述DCI用于调度物理共享信道，所述至少两个PDCCH候选分别关联不同的控制资源集CORESET，所述至少两个PDCCH候选之间存在关联关系；
    收发单元，用于在所述至少两个PDCCH候选上发送所述DCI；以及，根据所述DCI，发送或接收所述物理共享信道。
  32. 根据权利要求31所述的装置，其特征在于，所述至少两个PDCCH候选上的信息比特分别包括所述DCI的全部信息比特；或者，
    所述至少两个PDCCH候选上的信息比特分别包括所述DCI的部分信息比特。
  33. 根据权利要求31或32所述的装置，其特征在于，所述至少两个PDCCH候选具有相同的聚合级别AL和相同的编号；或者，
    所述至少两个PDCCH候选具有不同的AL和相同的编号。
  34. 根据权利要求31至33中任一项所述的装置，其特征在于，所述处理单元还用于：
    确定参考位置，所述参考位置是根据至少两个CORESET中的至少一个CORESET或所述至少两个PDCCH候选中的至少一个PDCCH候选确定的；
    基于所述参考位置，确定所述物理共享信道的起始位置；
    所述收发单元具体用于：
    基于所述起始位置，发送或接收所述物理共享信道。
  35. 根据权利要求34所述的装置，其特征在于，所述参考位置是根据所述至少两个CORESET中的一个CORESET或所述至少两个PDCCH候选中的一个PDCCH候选确定的一个参考位置。
  36. 根据权利要求35所述的装置，其特征在于，所述处理单元具体用于：
    基于所述参考位置，确定所述DCI中的第一字段以及所述起始位置，所述第一字段用于指示所述起始位置相对于所述参考位置的偏移。
  37. 根据权利要求34所述的装置，其特征在于，所述参考位置是根据所述至少两个CORESET或所述至少两个PDCCH候选对应的检测时机的起始符号位置确定的至少两个参考位置。
  38. 根据权利要求37所述的装置，其特征在于，所述处理单元具体用于：
    基于所述至少两个参考位置，确定所述DCI中的第一字段以及至少两个起始位置，所述第一字段用于指示所述至少两个起始位置相对于所述至少两个参考位置的偏移。
  39. 根据权利要求38所述的装置，其特征在于，所述第一字段包括至少两个第二字段，所述至少两个第二字段与所述至少两个CORESET或所述至少两个PDCCH候选具有 对应关系，所述至少两个第二字段分别用于指示所述至少两个起始位置相对于所述至少两个参考位置的偏移；
    所述处理单元具体用于：
    基于所述至少两个参考位置，确定所述至少两个字段以及所述至少两个起始位置。
  40. 根据权利要求31至39中任一项所述的装置，其特征在于，所述至少两个PDCCH候选对应的检测时机的起始符号位置相同、结束符号位置相同、或者检测时间完全重叠。
  41. 一种数据传输的装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储计算机程序，当所述处理器调用所述计算机程序时，使得所述装置执行如权利要求1至10中任一项、或者权利要求11至20中任一项所述的方法。
  42. 一种计算机可读存储介质，用于存储计算机程序，其特征在于，所述计算机程序包括用于实现如权利要求1至10中任一项、或者权利要求11至20中任一项所述的方法的指令。
  43. 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，使得计算机实现如权利要求1至10中任一项、或者权利要求11至20中任一项所述的方法。
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