WO2020029773A1 - 用户设备、基站及其数据传输方法及装置 - Google Patents

用户设备、基站及其数据传输方法及装置 Download PDF

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Publication number
WO2020029773A1
WO2020029773A1 PCT/CN2019/096785 CN2019096785W WO2020029773A1 WO 2020029773 A1 WO2020029773 A1 WO 2020029773A1 CN 2019096785 W CN2019096785 W CN 2019096785W WO 2020029773 A1 WO2020029773 A1 WO 2020029773A1
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cbg
harq
user equipment
base station
uplink data
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PCT/CN2019/096785
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English (en)
French (fr)
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张飒
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北京展讯高科通信技术有限公司
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Priority to EP19848564.1A priority Critical patent/EP3836450A4/en
Priority to US17/267,338 priority patent/US11962423B2/en
Publication of WO2020029773A1 publication Critical patent/WO2020029773A1/zh

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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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • 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
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink 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
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • 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
    • H04L1/1614—Details of the supervisory signal using bitmaps
    • 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
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a user equipment, a base station, and a data transmission method and device thereof.
  • 5G new air interface is a global 5G standard based on the new air interface design based on OFDM (Orthogonal Frequency Division Multiplexing) technology. It is also the basis for the next generation of cellular mobile communication technology. Low, higher reliability and many other advantages. Recently, the plenary meeting of the International Standards Organization 3GPP (3rd Generation Partnership Project) has approved the independent networking standard for the 5G new air interface of the 5th generation mobile communication technology.
  • 3GPP 3rd Generation Partnership Project
  • HARQ Hybrid, Automatic, Repeat, and ReQuest
  • FEC Forward Error, Correction
  • ARQ Automatic, Repeat, and ReQuest
  • FEC adds redundant information to enable the receiving end to correct some errors, thereby reducing the number of retransmissions.
  • the receiver will request the sender to resend data through the ARQ mechanism.
  • the receiving end uses an error detection code, usually a CRC (Cyclic Redundancy Check, cyclic redundancy check) check, to detect whether the received data packet is in error. If there is no error, the receiving end will send an ACK (positive acknowledgment) to the sending end. After receiving the ACK, the sending end will then send the next data packet. If an error occurs, the receiver will discard the packet and send a NACK (negative acknowledgement) to the sender. After receiving the NACK, the sender will resend the same data.
  • CRC Cyclic Redundancy Check, cyclic redundancy check
  • AUL transmission (Autonomous UpLink) is introduced.
  • the user equipment When performing AUL transmission, the user equipment does not need to send an SR (scheduling request) first, and can send uplink data directly on the AUL pre-allocated time-frequency resources after the success of the LBT (listen before talk, listen before sending).
  • SR scheduling request
  • LBT listen before talk, listen before sending
  • the base station In AUL transmission, due to the uncertainty of LBT, the base station ’s HARQ-ACK feedback for AUL is also uncertain. After receiving the HARQ-ACK feedback NACK (negative ACK) from the base station, the user equipment Transport Block (TB) retransmission time is also uncertain.
  • NACK negative ACK
  • TB User Equipment Transport Block
  • FeLAA defines AUL-DFI (Downlink, Feedback, Information) to feedback AUL data.
  • AUL-DFI uses a bitmap to provide feedback on all HARQ (Hybrid Automatic Repeat Repeat, Hybrid Automatic Repeat Request) processes.
  • the base station When performing AUL transmission, the base station configures a HARQ-ID set that can be used for AUL transmission.
  • the user equipment selects a HARQ-ID in the set, determines NDI (New Data Indicator) and RV (redundant version).
  • the base station is informed through the UCI (Uplink Control Information) that the UE-ID is also included in the UCI.
  • UCI Uplink Control Information
  • UCI will be sent to the base station together with AUL PUSCH (Physical Uplink Shared Channel).
  • AUL PUSCH Physical Uplink Shared Channel
  • the base station After receiving the UCI and PUSCH, the base station will decode the UCI first and know the UE-ID, HARQ-ID, NDI, RV, etc. through UCI. After decoding the information, the PUSCH is decoded.
  • AUL supports two retransmission modes: scheduling-based retransmission and AUL retransmission.
  • scheduling-based retransmission refers to that when the user equipment receives an uplink grant (UL grant), and the HARQ-ID, TBS, NDI indicated by the uplink scheduling is completely consistent with a previous AUL transmission, the user equipment will Performing scheduling-based retransmission on the transmission block on the uplink scheduling instruction time-frequency resource;
  • AUL retransmission (that is, scheduling-free retransmission) means that the user equipment receives an AUL-DFI to instruct a certain HARQ to be NACK, Or, the transmission block of a certain HARQ process does not receive any uplink scheduling information or AUL-DFI of the base station for a period of time, then the user equipment may also use the retransmission mode of AUL retransmission.
  • LTE usually adopts a single-bit HARQ-ACK feedback scheme, and for high-speed transmission of eMBB services, the number of bits in each transmission block is large.
  • the number of code blocks (Code Blocks, CB) in each transmission block may be several times that of LTE. If the LTE single-bit HARQ-ACK feedback scheme is adopted, in the case of poor channel quality or in the scenario where eMBB and URLLC are multiplexed, the eMBB service is preempted by the URLLC service, causing some code blocks to cause decoding errors.
  • the entire transmission block needs to be retransmitted, which will lead to a serious reduction in data throughput and spectrum efficiency.
  • 5G introduces CBG (Code Block Group) retransmission and uses the CBG HARQ-ACK feedback scheme to divide a transmission block into several CBGs.
  • Each CBG includes one or more code blocks.
  • code blocks are in error, only the CBG where the error code block is located is retransmitted instead of the entire transmission block.
  • the user equipment is configured with the RRC parameter codeBlockGroupTransmission in a serving cell, and the maximum number of CBGs included in the serving cell transmission block is configured by the RRC parameter maxCodeBlockGroupsPerTransportBlock User equipment needs feedback HARQ-ACK bits.
  • CBG For the number of code blocks contained in a transport block as C, the user equipment feels that the number of CBG passes the formula before CBG contains Code blocks, where CBG n CBG , Included code blocks are Rear CBG contains Code blocks, of which CBG Contains CBs as For user equipment HARQ-ACK information bits are fed back in a 1-to-1 manner CBG. If the user equipment receives two transport blocks, the HARQ-ACK of the two transport blocks together feeds back the previous bits corresponding to the first transport block and the latter bits corresponding to the second transport block.
  • the CBG in the retransmitted transport block is the same as the CB contained in the corresponding CBG in the initial transmission transport block.
  • the HARQ-ACK codebook contains HARQ-ACK information bits, for a certain transport block if The user device will be at the end Information bits send NACK.
  • the user equipment receives a PDSCH scheduled by the DCI format 1_0, the user equipment only generates HARQ-ACK information for the transport block in the PDSCH.
  • the user equipment If the user equipment is not configured with the RRC parameter codeBlockGroupTransmission, the user equipment generates one bit of HARQ-ACK information for each transmission block.
  • the RRC parameter CBG-DL ON of the user equipment in a serving cell.
  • the user equipment configures the CBG included in the serving cell transmission block through the RRC parameter maxCodeBlockGroupsPerTransportBlock Maximum number For 4, the user equipment needs to feed back 4 HARQ-ACK bits.
  • a transmission block in FIG. 0 is composed of 10 code blocks, and the numbers are 0, 1, 2, ..., 9 respectively.
  • the number of code blocks is greater than
  • These 10 code blocks are divided into 4 CBGs, CBG0 and CBG1 contain 3 code blocks, and CBG2 and CBG3 contain 2 code blocks.
  • the HARQ-ACK fed back by the user equipment is 0111.
  • the base station After the base station successfully decodes the HARQ-ACK fed back by the user equipment, it only retransmits the CBG where CB0 is located, that is, CBG0. Only the code blocks (CB0, CB1, CB2) contained in CBG0 need to be retransmitted.
  • CBG retransmission uses the same CBG grouping method as the initial transmission.
  • the 5G new air interface is also standardizing unlicensed bands. Similar to LTE feLAA, the 5G new air interface can also send PUSCHs in a scheduling-free manner.
  • the unlicensed band of the 5G new air interface is studied on the NR configured grant base station to study the scheduling-free uplink transmission.
  • the HARQ process ID, NDI, and RVID are used to tell the base station through UCI.
  • the unlicensed band of the 5G new air interface also supports DFI to feedback uplink data.
  • the unlicensed frequency band of the 5G new air interface does not include UEID information in the UCI.
  • the UEID is distinguished by the UE specific DMRS in the unlicensed frequency band of the 5G new air interface.
  • the UE specific DMRS is one of the 5G new air interfaces.
  • a user-specific reference signal is used to tell the base station through UCI.
  • a transport block has a corresponding HARQ-ID during transmission; a transport block is divided into multiple CBGs.
  • the technical problem solved by the present invention is: in the unlicensed band of the 5G new air interface, how to obtain the IR gain for the data transmission mode of the AUL transmission (especially for the CBG level feedback method in the case where the number of DFI bits is limited).
  • an embodiment of the present invention provides a data transmission method, including:
  • the user equipment sends uplink data and the associated UCI to the base station through AUL transmission;
  • the base station identifies the user equipment that sends the uplink data through the UE-specific DMRS;
  • the base station decodes UCI
  • the base station decodes the uplink data
  • the base station sends a DFI to the user equipment, where the DFI includes first information, where the first information is used to indicate a location of the successfully decoded CBG;
  • the user equipment uses the first information to determine the HARQ-ID of the transport block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block where it is located;
  • the user equipment performs rescheduling without scheduling.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded is successfully included, wherein the transport block group includes One or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination in a CBG combination fails Decoding indicates that the CBG combination cannot be decoded successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination is successfully decoded.
  • the method before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • an embodiment of the present invention further provides a data transmission method, including:
  • the uplink data and the associated UCI are sent to the base station through AUL transmission, and the base station can identify the user equipment that sends the uplink data through the UE-specific DMRS;
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded is successfully included, wherein the transport block group includes One or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination in a CBG combination fails Decoding indicates that the CBG combination cannot be decoded successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination is successfully decoded.
  • the method before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • an embodiment of the present invention further provides a data transmission method, including:
  • the uplink data and the associated UCI sent by the user equipment are received through AUL transmission;
  • the DFI includes first information, and the user equipment can determine the HARQ- of the transmission block where the CBG needs to be retransmitted according to the first information; ID, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block in which it is located.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded is successfully included, wherein the transport block group includes One or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination in a CBG combination fails Decoding indicates that the CBG combination cannot be decoded successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination is successfully decoded.
  • the method before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • an embodiment of the present invention further provides a data transmission device, including: an uplink data sending unit, a downlink data receiving unit, a parsing unit, and an uplink data retransmission unit; wherein:
  • the uplink data sending unit is adapted to send uplink data and associated UCI to the base station through AUL transmission in the unlicensed band of the 5G new air interface, and the base station can identify the user equipment sending the uplink data through the UE specific DMRS;
  • a downlink data receiving unit adapted to receive a DFI, where the DFI includes first information
  • a parsing unit adapted to the first information to determine the HARQ-ID of the transport block where the CBG to be retransmitted is located, and the serial number of the CBG to be retransmitted in the HARQ of the transport block where it is located;
  • the uplink data retransmission unit is suitable for rescheduling without scheduling.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded is successfully included, wherein the transport block group includes One or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination in a CBG combination fails Decoding indicates that the CBG combination cannot be decoded successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination is successfully decoded.
  • the method before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • an embodiment of the present invention further provides a data transmission device, including: an uplink data receiving unit, an identifying unit, a decoding unit, and an indicating unit; wherein:
  • the uplink data receiving unit is adapted to receive uplink data and associated UCI sent by the user equipment in an unlicensed band of the 5G new air interface by means of AUL transmission;
  • An identification unit adapted to identify a user equipment that sends the uplink data through a UE-specific DMRS
  • a decoding unit adapted to decode UCI; and if the UCI is successfully decoded, decode the uplink data;
  • An indication unit adapted to send a DFI to the user equipment according to whether the decoding of the transport block or CBG is successful, the DFI includes first information, and the user equipment can determine, based on the first information, where the CBG needs to be retransmitted The HARQ-ID of the transport block and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block in which it is located.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded is successfully included, wherein the transport block group includes One or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination in a CBG combination fails Decoding indicates that the CBG combination cannot be decoded successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination is successfully decoded.
  • the method before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • an embodiment of the present invention further provides user equipment, where the user equipment supports an unlicensed frequency band of a 5G new air interface, and the user equipment further includes a data transmission apparatus as described above.
  • an embodiment of the present invention further provides a base station, the base station supports an unlicensed frequency band of a 5G new air interface, and the base station further includes a data transmission device as described above.
  • the base station identifies the user equipment that sends the uplink data through the UE specific DMRS, and decodes the uplink data if the UCI is successfully decoded.
  • the base station sends a DFI to the user equipment, where the DFI includes first information, where the first information is used to indicate a location of the successfully decoded CBG, and the user equipment determines through the first information
  • the scheduling-free retransmission of the PUCSH that feeds back NACK will select the same RV as the previous transmission. If the DFI indicates that no retransmission needs to occur, the user equipment can choose another RV version to obtain IR gain.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • 0 is a schematic diagram of a CBG retransmission mechanism in the background art of the present invention.
  • FIG. 1 is a flowchart of a data transmission method in Embodiment 1 of the present invention.
  • Embodiment 2 is a flowchart of a data transmission method in Embodiment 2 of the present invention.
  • FIG. 3 is a flowchart of a data transmission method according to a third embodiment of the present invention.
  • FIG. 4 is a structural block diagram of a data transmission device according to a fourth embodiment of the present invention.
  • FIG. 5 is a structural block diagram of a data transmission device in Embodiment 5 of the present invention.
  • the base station can use a bit in DFI to tell the user equipment.
  • the scheduling-free retransmission of the PUCSH with feedback NACK will select the same RV as the previous transmission. If the DFI indicates that no retransmission needs to occur, the user equipment can choose another RV version To get IR gain.
  • the base station can feed back the CBG-level HARQ-ACK in DFI, and the user equipment can determine the retransmission required by the DFI's CBG HARQ-ACK CBG to improve spectrum utilization.
  • the AUL-DFI contains a 16-bit HARQ-ACK Bitmap and a 2-bit TPC.
  • the DFI in the unlicensed band of the 5G new air interface also needs to include at least this information.
  • DFI should also introduce CBG-level feedback.
  • Each transmission block in the unlicensed band of the 5G new air interface can be configured with a maximum of 8 CBGs, and 16 HARQs require 128 bits for feedback.
  • the number of DCI bits in the unlicensed band of the 5G new air interface is limited (it may need to be multiplexed with a certain DCI format to reduce the complexity of blind detection of user equipment), and it cannot be extended indefinitely.
  • the inventor designed the technical solution of the present invention, which is a CBG-level feedback method for the case where the number of DFI bits is limited.
  • the base station decodes the uplink data, and according to the transmission block
  • the base station sends a DFI to the user equipment, where the DFI includes first information, where the first information is used to indicate a location of the successfully decoded CBG, thereby achieving scheduling-free retransmission.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • an embodiment of the present invention provides a data transmission method.
  • the data transmission method in this embodiment is applicable to an unlicensed frequency band of a 5G new air interface, and data transmission is performed between the base station and the user equipment through AUL transmission.
  • the user equipment sends uplink data and the associated UCI to the base station in an AUL transmission manner.
  • the user equipment sends uplink data and the associated UCI to the base station through AUL transmission.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • the method Before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the user equipment listens first and sends successfully, it sends uplink data in a scheduling-free manner on pre-configured resources, and the HARQ-ID, NDI, and RVID associated with the data It will be reported in UCI at the same time. UCI will piggyback to PUSCH and send a timer after the data is sent.
  • the base station identifies the user equipment that sends the uplink data through the UE-specific DMRS.
  • the base station After the base station receives the uplink data and control information sent by the user equipment, the base station obtains the UE-ID of the user equipment that sends the uplink data through the UE-specific DMRS.
  • the base station decodes the UCI.
  • the base station obtains HARQ-ID, NDI, and RVID by decoding UCI.
  • the base station uses a bit in DFI to tell the user equipment whether the decoding is successful.
  • step S104 is performed.
  • the base station decodes the uplink data.
  • the base station decodes the uplink data; according to whether the decoding of the transport block or CBG is successful, the DFI also needs to include the transport block level HARQ-ACK feedback and / or the CBG level HARQ-ACK feedback in the subsequent step S105, and the UCI In the case of successful decoding, it is no longer necessary to transmit HARQ-ACK feedback at the block level and / or HARQ-ACK feedback at the CBG level.
  • the possibility of not sending to the user equipment the HARQ-ID scheduling information or HARQ-ACK feedback information associated with the data is not excluded.
  • the user equipment may retransmit the data in a scheduling-free manner.
  • the base station sends a DFI to the user equipment, where the DFI includes first information.
  • the base station sends a DFI to the user equipment, where the DFI includes first information.
  • the first information is used to indicate a location where the CBG that is successfully decoded is located.
  • the first information includes: transport block-level HARQ-ACK feedback, and CBG-level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded successfully, wherein the transport block group includes one or more Transmission block.
  • the first information may not include: CBG-level HARQ-ACK feedback of HARQ / HARQ group of transport blocks / transport block groups for which all CBGs are successfully decoded.
  • the base station may instruct the retransmission data in many different ways, for example:
  • the user equipment sends uplink data in a pre-configured resource in a scheduling-free manner.
  • UCI will piggyback to PUSCH, and the user equipment will start a timer after the data is sent.
  • the base station After the base station receives the uplink data and control information sent by the user equipment, the base station obtains the UE-ID through the UE-specific DMRS, and then obtains the HARQ-ID, NDI, and RVID by decoding the UCI.
  • UCI When UCI is not successfully decoded, it can pass DFI Feedback NACK for the unpaired HARQ-ID, and use a bit in DFI to indicate that the user equipment has not successfully decoded UCI (or it can also instruct the user equipment to send the same as the last transmission when scheduling-free retransmission occurs) RV version).
  • the user equipment may adopt Way to retransmit the data.
  • Example 1 The user equipment succeeds in slot 0LBT, and continuously sends PUSCH and UCI in a scheduling-free manner.
  • the HARQ-ID of the PUSCH sent in slot 0 is 0, the HARQ-ID of the PUSCH sent in slot 1 is 1, and the HARQ-ID of the PUSCH sent in slot 2 is 2. Both use RVID of 0.
  • the scheduling-free retransmission timer on the user equipment side is 10ms. At this time, 15KHz SCS is used, and the length of a slot is 1ms.
  • the scheduling-free retransmission timer starts counting after the PUSCH corresponding to each HARQ-ID is transmitted. For HARQ-ID 0, the scheduling-free retransmission timer starts from slot 1. For HARQ-ID 1, the scheduling-free retransmission timer starts from slot 2. For HARQ-ID 2, the scheduling-free retransmission timer starts from slot 3. start the timer.
  • the base station received PUSCH and UCI sent by the user equipment in a scheduling-free manner at slots 0,1,2, and the base station obtained the UE-ID information through the UE-specific DMRS. But when the base station decodes the UCI received by slot 2, the decoding error occurs.
  • the base station succeeds in slot 7LTB, and uses DFI to feedback the HARQ-ACK to the user equipment.
  • the HARQ-ID bitmap is 1100000000000000, and the UCI decoding error (or retransmission of the same RV indication) is 1.
  • the user equipment received the DFI in slot 7, and knew that HARQ-ID 0 and 1 were successfully decoded through the bitmap of HARQ-ID, and other HARQ-ID decoding errors. Since the user equipment only sends HARQ-IDs 0, 1, 2 in this embodiment, the user equipment further determines that the HARQ-ID of the decoding error is 2.
  • the UCI decoding error (or retransmission of the same RV indication) in DFI is 1, and the user equipment selects the same RVID as the previous transmission when the HARQ-ID is scheduled for retransmission, that is, the RVID is 0.
  • the AUL-DFI contains a 16-bit HARQ-ACK Bitmap and a 2-bit TPC.
  • the DFI in the unlicensed band of the 5G new air interface also needs to include at least this information.
  • DFI should also introduce CBG-level feedback.
  • Each transmission block in the unlicensed band of the 5G new air interface can be configured with a maximum of 8 CBGs, and 16 HARQs require 128 bits for feedback.
  • the present invention adopts the following methods to overcome the above defects:
  • Method one transmitting block-level HARQ-ACK feedback + part of CBG-level HARQ-ACK feedback.
  • All available HARQ processes are divided into M groups, and the base station selects one of them to feed back the CBG-level HARQ-ACK according to the received PUSCH decoding situation and HARQ-ID.
  • M needs to satisfy the following constraints:
  • N HARQ-ID is the total number of HARQ processes available without scheduling
  • N CBG is the maximum number of CBGs configured by the base station for scheduling-free uplink transmission.
  • M is configured by the base station to the user equipment through high-level signaling or a default value is defined by the protocol.
  • the HARQ process in each group can be configured through high-level signaling, or through a predefined grouping method.
  • the transmission block level HARQ-ACK feedback is optional.
  • the DFI may include the transmission block level HARQ-ACK feedback or may not include the transmission block level HARQ-ACK feedback. Does the transmission block level HARQ-ACK feedback Affects the number of bits available for CBG level feedback.
  • Example 2 The number of available processes is 16, the maximum number of CBGs configured by the base station for scheduling-free uplink transmission is 4, DFI uses transport block-level HARQ-ACK, and bitmap feeds back all transport block-level HARQ-ACKs for HARQ processes, which can be used in DFI The number of bits fed back at the CBG level HARQ-ACK is 27. According to the formula in Mode 1, the minimum value of M can be determined to be 3.
  • the base station configures M to be 4, through high-level signaling, and all 16 HARQ processes are available.
  • the available HARQ processes in the first group are 0,1,2,3; the available HARQ processes in the second group are 4,5,6, 7; the available HARQ processes in the third group are 8,9,10,11; the available HARQ processes in the fourth group are 12,13,14,15.
  • DFI 2 bits are used to indicate which group of HARQ-ACKs are fed back. 00 indicates the first group, 01 indicates the second group, 10 indicates the third group, and 11 indicates the fourth group.
  • the user equipment succeeds in slot 0LBT and continuously sends PUSCH and UCI in a scheduling-free manner.
  • the HARQ-ID of the PUSCH sent in slot 0 is 0, the HARQ-ID of the PUSCH sent in slot 1 is 1, and the HARQ-ID of the PUSCH sent in slot 2 is 2. Both use RVID of 0.
  • the user equipment side schedule-free retransmission timer is 10ms. At this time, 15KHz SCS is used, and the length of a slot is 1ms.
  • the scheduling-free retransmission timer starts counting after the PUSCH corresponding to each HARQ-ID is transmitted. For HARQ-ID 0, the scheduling-free retransmission timer starts from slot 1. For HARQ-ID 1, the scheduling-free retransmission timer starts from slot 2. For HARQ-ID 2, the scheduling-free retransmission timer starts from slot 1. 3 Start timing.
  • the base station received PUSCH and UCI sent by the user equipment in a scheduling-free manner at slots 0,1,2, the base station obtained the UE-ID information through the UE-specific DMRS, and the base station decoded the UCI and PUSCH of slot 0,1 and decoded successfully. But when the base station decodes slot 2, CBG 0 and 1 are wrong, and CBG 2 and 3 are wrong.
  • the base station succeeds in slot 7LTB, and uses DFI to feedback HARQ-ACK to the user equipment.
  • the bitmap of the transmission block-level HARQ-ID is 1100000000000000, and the CBG-level feedback information is 001111111100110000.
  • the first 2 bits (ie, "00") represent the first group, and the last 16 bits represent the CBG-level HARQ-ACK feedback bitmap.
  • the user equipment received the DFI in slot 7. It can be seen that HARQ-ID 0 and 1 were successfully decoded, CBG 0 and 1 of HARQ-ID 2 were wrong, and CBG 2 and 3 were correct. When the user equipment performs scheduling-free retransmission, it may retransmit CBG 0 and 1 to HARQ-ID 2 only.
  • Method 2 Transmission of block-level HARQ-ACK feedback + CBG-level HARQ-ACK feedback.
  • All available HARQ processes are divided into M groups, and the base station selects one of them to feed back the CBG-level HARQ-ACK according to the received PUSCH decoding situation and HARQ-ID.
  • M needs to satisfy the following constraints:
  • N CBG is the maximum number of CBGs configured for the base station for scheduling-free uplink transmission.
  • M is configured by the base station to the user equipment through high-level signaling or a default value is defined by the protocol.
  • the HARQ process in each group can be configured through high-level signaling, or through a predefined grouping method.
  • the CBG-level HARQ-ACK feedback of the DFI logically ANDs the CBGs corresponding to all the transport blocks in each group.
  • the feedback bit of the CBG-level HARQ-ACK in DFI is M ⁇ N CBG .
  • the transmission block-level HARQ-ACK feedback is optional.
  • the DFI may include the transmission block-level HARQ-ACK feedback, or it may not include the transmission block-level HARQ-ACK feedback. Does it include the transmission block-level HARQ-ACK feedback? Affects the number of bits available for CBG level feedback.
  • Example 3 The number of available processes is 16, the maximum number of CBGs configured by the base station for scheduling-free uplink transmission is 4, and DFI uses transport block-level HARQ-ACK.
  • the bitmap feeds back the transport block-level HARQ-ACK for all HARQ processes.
  • DFI can The number of bits fed back at the CBG level HARQ-ACK is 27. According to the formula in the second manner, the maximum value of M can be determined to be 6.
  • the base station configures M to be 4, through high-level signaling, and all 16 HARQ processes are available.
  • the available HARQ processes in the first group are 0,1,2,3; the available HARQ processes in the second group are 4,5,6, 7; available HARQ processes in the third group are 8,9,10,11; available HARQ processes in the first group are 12,13,14,15.
  • DFI 2 bits are used to indicate which group of HARQ-ACKs are fed back, 00 indicates the first group, 01 indicates the second group, 10 indicates the third group, and 11 indicates the fourth group.
  • the user equipment succeeds in slot 0LBT and continuously sends PUSCH and UCI in a scheduling-free manner.
  • the HARQ-ID of the PUSCH sent in slot 0 is 0, the HARQ-ID of the PUSCH sent in slot 1 is 1, and the HARQ-ID of the PUSCH sent in slot 2 is 2. Both use RVID of 0.
  • the scheduling-free retransmission timer on the user equipment side is 10ms. At this time, 15KHz SCS is used, and the length of a slot is 1ms.
  • the scheduling-free retransmission timer starts counting after the PUSCH corresponding to each HARQ-ID is transmitted. For HARQ-ID 0, the scheduling-free retransmission timer starts from slot 1. For HARQ-ID 1, the scheduling-free retransmission timer starts from slot 2. For HARQ-ID 2, the scheduling-free retransmission timer starts from slot 1. 3 Start timing.
  • the base station received PUSCH and UCI sent by the user equipment in a scheduling-free manner at slots 0,1,2, the base station obtained the UE-ID information through the UE-specific DMRS, and the base station decoded the UCI and PUSCH of slot 0,1 and decoded successfully. But when the base station decodes slot 2, CBG 0 and 1 are wrong, and CBG 2 and 3 are right.
  • the base station succeeds in slot 7LTB, and uses DFI to feedback the HARQ-ACK to the user equipment.
  • the bitmap of the HARQ-ID of the transmission block is 1100000000000000, and the HARQ-ACK of the CBG level is 0011000000000000.
  • the user equipment received the DFI in slot 7.
  • the block-level HARQ-ACK By transmitting the block-level HARQ-ACK, it can be known that HARQ-ID 0 and 1 were successfully decoded, and HARQ-ID 2 was not successfully decoded.
  • HARQ-ACK feedback of CBG level it is further determined that CBG 0 and 1 of HARQ-ID 2 are wrong, and CBG 2 and 3 are right.
  • the user equipment may retransmit CBG 0 and 1 to HARQ-ID 2 only.
  • the HARQ-ACK feedback at the transport block level is optional. In another embodiment, only the HARQ-ACK feedback at the CBG level may be used. There are the following examples:
  • Example 4 The number of available processes is 16, the maximum number of CBGs configured by the base station for scheduling-free uplink transmission is 4, DFI does not use HARQ-ACK at the transport block level, and bitmap feeds back the HARQ-ACK at the transport level for all HARQ processes, which can be used in DFI The number of bits fed back at the CBG level HARQ-ACK is 27. According to the formula in Method 2, the maximum value of M can be determined to be 6.
  • the base station configures M to be 4, through high-level signaling, and all 16 HARQ processes are available.
  • the available HARQ processes in the first group are 0,1,2,3; the available HARQ processes in the second group are 4,5,6, 7; available HARQ processes in the third group are 8,9,10,11; available HARQ processes in the first group are 12,13,14,15.
  • DFI 2 bits are used to indicate which group of HARQ-ACKs are fed back. 00 indicates the first group, 01 indicates the second group, 10 indicates the third group, and 11 indicates the fourth group.
  • the user equipment succeeds in slot 0LBT and continuously sends PUSCH and UCI in a scheduling-free manner.
  • the HARQ-ID of the PUSCH sent in slot 0 is 0, the HARQ-ID of the PUSCH sent in slot 1 is 4, and the HARQ-ID of the PUSCH sent in slot 2 is 8. Both use RVID of 0.
  • the scheduling-free retransmission timer on the user equipment side is 10ms. At this time, 15KHz SCS is used, and the length of a slot is 1ms.
  • the scheduling-free retransmission timer starts counting after the PUSCH corresponding to each HARQ-ID is transmitted. For HARQ-ID 0, the scheduling-free retransmission timer starts from slot 1. For HARQ-ID 4, the scheduling-free retransmission timer starts from slot 2. For HARQ-ID 8, the scheduling-free retransmission timer starts from slot 3. start the timer.
  • the base station received PUSCH and UCI sent by the user equipment in a scheduling-free manner at slots 0,1,2, the base station obtained the UE-ID information through the UE-specific DMRS, and the base station decoded the UCI and PUSCH of slot 0,1 and decoded successfully. But when the base station decodes slot 2, decoding CBG 0 and 1 is wrong, and CBG 2 and 3 are wrong.
  • the base station succeeds in slot 7 and LTB, and uses DFI to feedback the HARQ-ACK to the user equipment.
  • the CBG-level HARQ-ACK feedback is 1111111100110000.
  • the user equipment received the DFI in slot 7.
  • the HARQ-ACK of the CBG level it can be known that the HARQ-ID of the first group and the second group were successfully decoded.
  • the CBG 0 and 1 of the third group were wrong, and the CBG 2 and 3 were unpaired.
  • the user equipment further determines that HARQ-ID 0 and 1 are successfully decoded according to the HARQ-ID information sent by itself, and HARQ-ID 2 is not successfully decoded.
  • CBG 0 and 1 of HARQ-ID 2 are wrong, and CBG 2 and 3 are right.
  • the user equipment performs scheduling-free retransmission, it may retransmit CBG 0 and 1 to HARQ-ID 2 only.
  • Method 3 Transmission of block-level HARQ-ACK feedback + part of CBG-level HARQ-ACK feedback
  • the base station selects at most P of the received PUSCH decoding conditions and HARQ-ID to feed back the CBG-level HARQ-ACK. P needs to satisfy the following constraints
  • N HARQ-ID is the total number of HARQ processes available without scheduling
  • N CBG is the maximum number of CBGs configured by the base station for scheduling-free uplink transmission.
  • P is configured by the base station to the user equipment through high-level signaling or a default value is defined by the protocol.
  • DFI contains transport block level HARQ-ACK feedback.
  • the number of HARQ-ACK feedback bits at the CBG level is
  • Example 5 The number of available processes is 16, the maximum number of CBGs configured by the base station for scheduling-free uplink transmission is 4, DFI uses transport block-level HARQ-ACK bitmap to feed back all HARQ processes' transport block-level HARQ-ACK, which can be used in DFI The number of bits fed back at the CBG level HARQ-ACK is 27. According to the formula in method three, the maximum value of P can be determined to be 3.
  • the user equipment succeeded in slot 0 and LBT, and continuously sent PUSCH and UCI in a scheduling-free manner.
  • the HARQ-ID of the PUSCH sent in slot 0 is 0, the HARQ-ID of the PUSCH sent in slot 1 is 1, and the HARQ-ID of the PUSCH sent in slot 2 is 2. Both use RVID of 0.
  • the user equipment side schedule-free retransmission timer is 10ms. At this time, 15KHz SCS is used, and the length of a slot is 1ms.
  • the scheduling-free retransmission timer starts counting after the PUSCH corresponding to each HARQ-ID is transmitted. For HARQ-ID 0, the scheduling-free retransmission timer starts from slot 1. For HARQ-ID 1, the scheduling-free retransmission timer starts from slot 2. For HARQ-ID 2, the scheduling-free retransmission timer starts from slot 1. 3 Start timing.
  • the base station received PUSCH and UCI sent by the user equipment in a scheduling-free manner at slots 0,1,2, the base station obtained the UE-ID information through the UE-specific DMRS, and the base station decoded the UCI and PUSCH of slot 0,1 and decoded successfully. But when the base station decodes slot 2, CBG 0 and 1 are wrong, and CBG 2 and 3 are right.
  • the base station succeeds in slot 7LTB, and uses DFI to feedback HARQ-ACK to the user equipment.
  • the bitmap of the block-level HARQ-ID is 1100000000000000, and the feedback information of the CBG level is 001000110100000010000000.
  • the 24 bits are divided into 3 groups, and the top 4 of each group The bit indicates the HARQ-ID, and the last 4 bits indicate the specific CBG level HARQ-ACK.
  • the first four bits 0010 indicate that the HARQ-ID is 2
  • the fifth to eighth bits 0011 indicate that CBG 0 and 1 are wrong, and CBG 2 and 3 are right.
  • the user equipment received the DFI in slot 7. It can be seen that HARQ-ID 0 and 1 were successfully decoded, CBG 0 and 1 of HARQ-ID 2 were wrong, and CBG 2 and 3 were correct. When the user equipment performs scheduling-free retransmission, it may retransmit CBG 0 and 1 only to HARQ-ID2.
  • CBG bundling can be used to further reduce the number of bits required for HARQ-ACK feedback.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination requires retransmission. If any CBG in a CBG combination requires retransmission, it indicates The CBG combination requires retransmission. If all CBGs in a CBG combination do not need to be retransmitted, it indicates that the CBG combination does not need to be retransmitted.
  • the available HARQ processes are divided into two groups.
  • the number of HARQ processes in the first group is N mod N HARQ-ID ;
  • the number of processes in the second group is N HARQ-ID -N mod N HARQ-ID .
  • the number of bits fed back for each HARQ process in the first group is
  • the number of bits fed back for each HARQ process in the second group is
  • the HARQ-ACK feedback bit of the CBG level is N.
  • HARQ may not be grouped.
  • the number of bits fed back by each HARQ process is The HARQ-ACK feedback bit of the CBG level is
  • N HARQ-ID is the total number of HARQ processes available without scheduling
  • N CBG is the maximum number of CBGs configured by the base station for scheduling-free uplink transmission.
  • the CBGs of the transport blocks corresponding to each process are divided into X groups according to the number of bits (X) fed back by each HARQ process. After grouping, the following constraint conditions are met: the number of CBGs in the former group is not less than the number of CBGs in the latter group, and the number of CBGs in the former group and the number of CBGs in the latter group is not greater than 1.
  • the HARQ-ACK feedback of the CBG in each group is logically ANDed.
  • Example 6 The number of available processes configured by the base station to the user equipment is 8, which are 0,1,2,3,4,5,6,7.
  • the maximum number of CBGs configured by the base station for scheduling-free uplink transmission is 4, and the number of bits that can be used for CBG-level HARQ-ACK feedback in DFI is 27.
  • CBG is divided into 3 groups, the first group contains CBG 0,1; the second group contains CBG 2; the third group contains CBG 3.
  • CBGs in the same group must be bundled, that is, CBG 0 and 1 of the first group are bundled; bundles of the second and third groups do not need to be bundled.
  • the user equipment succeeds in slot 0LBT and continuously sends PUSCH and UCI in a scheduling-free manner.
  • the HARQ-ID of the PUSCH sent in slot 0 is 0, the HARQ-ID of the PUSCH sent in slot 1 is 1, and the HARQ-ID of the PUSCH sent in slot 2 is 2. Both use RVID of 0.
  • the user equipment side schedule-free retransmission timer is 10ms. At this time, 15KHz SCS is used, and the length of a slot is 1ms.
  • the scheduling-free retransmission timer starts counting after the PUSCH corresponding to each HARQ-ID is transmitted. For HARQ-ID 0, the scheduling-free retransmission timer starts from slot 1. For HARQ-ID 1, the scheduling-free retransmission timer starts from slot 2. For HARQ-ID 2, the scheduling-free retransmission timer starts from slot 1. 3 Start timing.
  • the base station received PUSCH and UCI sent by the user equipment in a scheduling-free manner at slots 0,1,2, and the base station obtained the UE-ID information through the UE-specific DMRS.
  • the base station decodes slot 2, CBG 0 and 2, the solution is wrong, and CBG 1 and 3 are correct.
  • the base station uses DFI to feedback the CBG-level HARQ-ACK to the user equipment, which is 111111001000000000000000, a total of 24 bits.
  • the user equipment received the DFI in slot 7. It can be seen that HARQ-ID 0 and 1 were successfully decoded, CBG 0, 1 and 2 of HARQ-ID were wrong, and CBG 3 was correct.
  • the UE may retransmit CBG 0, 1, and 2 to HARQ-ID 2 only.
  • the base station when the base station configures the user equipment with multiple scheduling-free resources, and the user equipment can use the multiple scheduling-free resources to send uplink data at the same time, the base station indicates in the DCI that it is Which resource.
  • DCI needs Bits to indicate which scheduling-free resource the base station received.
  • the user equipment receives a DFI.
  • the DFI includes first information.
  • the user equipment uses the first information to determine the HARQ-ID of the transport block where the CBG that needs to be retransmitted and the sequence number of the CQ that needs to be retransmitted in the HARQ of the transport block where it is.
  • the user equipment performs scheduling-free retransmission.
  • the base station in the unlicensed band of the 5G new air interface, for the data transmission method of AUL transmission, the base station identifies the user equipment that sends the uplink data through the UE specific DMRS. In the case of successful decoding, the uplink data is decoded. According to whether the decoding of the transport block or CBG is successful, the base station sends a DFI to the user equipment.
  • the DFI includes first information, and the first information is used to indicate successful decoding.
  • the user equipment uses the first information to determine the HARQ-ID of the transport block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block where it is located. Scheduling-free retransmission. After receiving the instruction, the user equipment selects the same RV as the previous transmission for the scheduling-free retransmission of the PUCSH that feedbacks NACK. If the DFI indicates that no retransmission needs to occur, the user equipment You can choose other RV versions to get IR gain.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • an embodiment of the present invention provides a data transmission method, which may be generally implemented by a user equipment.
  • the user equipment sends uplink data and the associated UCI to the base station through AUL transmission.
  • the base station can identify the user equipment that sends the uplink data through the UE-specific DMRS.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • the method Before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the user equipment receives a DFI, where the DFI includes first information.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded is successfully included, wherein the transport block group includes One or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination in a CBG combination fails Decoding indicates that the CBG combination cannot be decoded successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination is successfully decoded.
  • the base station in the unlicensed band of the 5G new air interface, for the data transmission method of AUL transmission, the base station identifies the user equipment that sends the uplink data through the UE specific DMRS. In the case of successful decoding, the uplink data is decoded. According to whether the decoding of the transport block or CBG is successful, the base station sends a DFI to the user equipment.
  • the DFI includes first information, and the first information is used to indicate successful decoding.
  • the user equipment uses the first information to determine the HARQ-ID of the transport block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block where it is located. Scheduling-free retransmission. After receiving the instruction, the user equipment selects the same RV as the previous transmission for the scheduling-free retransmission of the PUCSH that feedbacks NACK. If the DFI indicates that no retransmission needs to occur, the user equipment You can choose other RV versions to get IR gain.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • an embodiment of the present invention provides a data transmission method.
  • the method may be generally implemented by a base station.
  • S301 Receive the uplink data and the associated UCI sent by the user equipment in an AUL transmission manner.
  • the base station receives the uplink data and the associated UCI sent by the user equipment through AUL transmission.
  • the UCI includes HARQ-ID, NDI, and RVID associated with the uplink data.
  • the method Before sending the uplink data and the associated UCI to the base station by using the AUL transmission method, the method further includes: performing a listen first and then transmitting successfully.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded is successfully included, wherein the transport block group includes One or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination in a CBG combination fails Decoding indicates that the CBG combination cannot be decoded successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination is successfully decoded.
  • the base station identifies the user equipment that sends the uplink data through the UE specific DMRS.
  • the uplink data is decoded.
  • the base station sends a DFI to the user equipment.
  • the DFI includes first information, and the first information is used to indicate successful decoding.
  • the user equipment uses the first information to determine the HARQ-ID of the transport block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block where it is located. Scheduling-free retransmission. After receiving the instruction, the user equipment selects the same RV as the previous transmission for the scheduling-free retransmission of the PUCSH that feedbacks NACK. If the DFI indicates that no retransmission needs to occur, the user equipment You can choose other RV versions to get IR gain.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • an embodiment of the present invention provides a data transmission device.
  • the data transmission device includes an uplink data sending unit 401, a downlink data receiving unit 402, a parsing unit 403, and an uplink data retransmission unit 404.
  • the main functions of each unit are as follows:
  • the uplink data sending unit 401 is adapted to send uplink data and associated UCI to the base station through AUL transmission in the unlicensed band of the 5G new air interface.
  • the base station can identify the user equipment that sends the uplink data through the UE specific DMRS. ;
  • the downlink data receiving unit 402 is adapted to receive a DFI, where the DFI includes first information
  • the parsing unit 403 is adapted to determine, based on the first information, a HARQ-ID of a transport block where a CBG to be retransmitted is located, and a sequence number of the CBG to be retransmitted in the HARQ of the transport block where the CBG is located;
  • the uplink data retransmission unit 404 is adapted to perform scheduling-free retransmission.
  • the base station in the unlicensed band of the 5G new air interface, for the data transmission method of AUL transmission, the base station identifies the user equipment that sends the uplink data through the UE specific DMRS. In the case of successful decoding, the uplink data is decoded. According to whether the decoding of the transport block or CBG is successful, the base station sends a DFI to the user equipment.
  • the DFI includes first information, and the first information is used to indicate successful decoding.
  • the user equipment uses the first information to determine the HARQ-ID of the transport block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block where it is located. Scheduling-free retransmission. After receiving the instruction, the user equipment selects the same RV as the previous transmission for the scheduling-free retransmission of the PUCSH that feedbacks NACK. If the DFI indicates that no retransmission needs to occur, the user equipment You can choose other RV versions to get IR gain.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • the method before sending the uplink data and the associated UCI to the base station in the manner of AUL transmission, the method may further include: listening first and sending later and succeeding.
  • the UCI may include HARQ-ID, NDI, and RVID associated with the uplink data.
  • the first information includes: transport block-level HARQ-ACK feedback, and CBG-level HARQ-ACK feedback of a transport block or a transport block group where a CBG that failed to be decoded successfully, wherein the transport block group Includes one or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination fails Successful decoding indicates that the CBG combination failed to decode successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination was successfully decoded.
  • an embodiment of the present invention provides a data transmission device.
  • the data transmission device includes: an uplink data receiving unit 501, an identification unit 502, a decoding unit 503, and an instruction unit 504; the main functions of each unit are as follows:
  • the uplink data receiving unit 501 is adapted to receive uplink data and associated UCI sent by the user equipment in an unlicensed band of the 5G new air interface by means of AUL transmission;
  • An identifying unit 502 adapted to identify a user equipment that sends the uplink data through a UE-specific DMRS;
  • An instruction unit 504 adapted to send a DFI to the user equipment according to whether the decoding of the transmission block or the CBG is successful, the DFI includes first information, and the user equipment can determine, based on the first information, where the CBG needs to be retransmitted The HARQ-ID of the transport block that is the first transport block and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block that it is in.
  • the base station in the unlicensed band of the 5G new air interface, for the data transmission method of AUL transmission, the base station identifies the user equipment that sends the uplink data through the UE specific DMRS. In the case of successful decoding, the uplink data is decoded. According to whether the decoding of the transport block or CBG is successful, the base station sends a DFI to the user equipment.
  • the DFI includes first information, and the first information is used to indicate successful decoding.
  • the user equipment uses the first information to determine the HARQ-ID of the transport block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block where it is located. Scheduling-free retransmission. After receiving the instruction, the user equipment selects the same RV as the previous transmission for the scheduling-free retransmission of the PUCSH that feedbacks NACK. If the DFI indicates that no retransmission needs to occur, the user equipment You can choose other RV versions to get IR gain.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • the method before sending the uplink data and the associated UCI to the base station in the manner of AUL transmission, the method may further include: listening first and sending later and succeeding.
  • the UCI may include HARQ-ID, NDI, and RVID associated with the uplink data.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or a transport block group in which a CBG that failed to be decoded successfully, wherein the transport block group Includes one or more transport blocks.
  • a CBG combination is formed.
  • Each CBG combination includes one or more CBGs.
  • each bit indicates whether a CBG combination was successfully decoded. If any CBG combination fails Successful decoding indicates that the CBG combination failed to decode successfully. If all CBGs in a CBG combination are successfully decoded, it indicates that the CBG combination was successfully decoded.
  • an embodiment of the present invention provides a user equipment.
  • the user equipment supports an unlicensed frequency band of a 5G new air interface.
  • the user equipment further includes a data transmission device as provided in Embodiment 4 of the present invention. Therefore, the user equipment can identify the user equipment that sends the uplink data through the UE-specific DMRS for the data transmission method of AUL transmission in the unlicensed band of the 5G new air interface, and decodes the uplink data if the UCI is successfully decoded.
  • the base station sends a DFI to the user equipment, where the DFI includes first information, where the first information is used to indicate a location of the successfully decoded CBG, and the user equipment passes the The first information is used to determine the HARQ-ID of the transmission block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transmission block where it is located, so as to achieve scheduling-free retransmission.
  • the user equipment receives After this instruction, for the scheduling-free retransmission of the PUCSH that feeds back NACK, the same RV as the previous transmission is selected. If the DFI indicates that no retransmission is required, the user equipment can select another RV version to obtain IR gain. .
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • an embodiment of the present invention provides a base station.
  • the base station supports an unlicensed frequency band of a 5G new air interface.
  • the base station further includes a data transmission device as provided in Embodiment 5 of the present invention. Therefore, the base station can use the UE-specific DMRS to identify the user equipment that sends the uplink data in the unlicensed frequency band of the 5G new air interface, and decodes the uplink data when the UCI is successfully decoded.
  • the base station sends a DFI to the user equipment, where the DFI includes first information, where the first information is used to indicate a location of the successfully decoded CBG, and the user equipment passes the first A message to determine the HARQ-ID of the transport block where the CBG needs to be retransmitted, and the sequence number of the CBG that needs to be retransmitted in the HARQ of the transport block where it is located, so as to achieve scheduling-free retransmission.
  • the scheduling-free retransmission of the PUCSH that feedbacks NACK will select the same RV as the previous transmission. If the DFI indicates that no retransmission needs to occur, the user equipment can select another RV version to obtain IR gain.
  • the first information includes: transport block level HARQ-ACK feedback, and CBG level HARQ-ACK feedback of a transport block or transport block group where a CBG that failed to be decoded successfully,
  • the transmission block group includes one or more transmission blocks, thereby implementing CBG level feedback in a case where the number of DFI bits is limited.
  • the program may be stored in a computer-readable storage medium, and the storage medium may include : ROM, RAM, disk or disc, etc.

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Abstract

用户设备、基站及其数据传输方法及装置，所述数据传输方法包括：在5G新空口的非授权频段中，用户设备通过AUL传输的方式向基站发送上行数据及相关联的UCI；基站通过UE specific DMRS来识别发送所述上行数据的用户设备；基站对UCI进行解码；在UCI成功解码的情况下，基站对所述上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息；用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；用户设备进行免调度的重传。本发明实现了免调度的重传，尤其是针对DFI比特数受限的情形。

Description

用户设备、基站及其数据传输方法及装置
本申请要求于2018年08月10日提交中国专利局、申请号为201810914055.1、发明名称为“用户设备、基站及其数据传输方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域，特别是涉及一种用户设备、基站及其数据传输方法及装置。
背景技术
5G新空口(5GNR)是基于OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)技术的全新空口设计的全球性5G标准，也是下一代蜂窝移动通信技术的基础，5G新空口具有时延更低、可靠性更高等诸多优势。近期，国际标准组织3GPP(第三代合作伙伴计划)全体会议已批准第五代移动通信技术5G新空口的独立组网标准。
HARQ(Hybrid Automatic Repeat reQuest，混合式自动重传请求)，是一种结合FEC(Forward Error Correction)与ARQ(Automatic Repeat reQuest)方法的技术。FEC通过添加冗余信息，使得接收端能够纠正一部分错误，从而减少重传的次数。对于FEC无法纠正的错误，接收端会通过ARQ机制请求发送端重发数据。接收端使用检错码，通常为CRC(Cyclic Redundancy Check，循环冗余校验)校验，来检测接收到的数据包是否出错。如果无错，则接收端会发送一个ACK(肯定的确认)给发送端，发送端收到ACK后，会接着发送下一个数据包。如果出错，则接收端会丢弃该数据包，并发送一个NACK (否定的确认)给发送端，发送端收到NACK后，会重发相同的数据。
在LTE feLAA(Further Enhanced Licensed-Assisted Access)中，引入了AUL传输(Autonomous UpLink，自主/自发上行传输)。用户设备在进行AUL传输时，不需要先发送SR(scheduling request)，可以在LBT(listen before talk，先听后发)成功后，直接在AUL预分配的时频资源上发送上行数据。采用AUL的传输方式，可以显著减少时延。
在AUL传输中，由于LBT的不确定性，基站对于AUL的HARQ-ACK反馈也是不确定的，用户设备在接收到基站的HARQ-ACK反馈NACK(否定式ACK)后，对于某一个传输块(Transport Block，TB)的重传时间也是不确定的。
feLAA中定义了AUL-DFI(Downlink Feedback Information)来对AUL的数据进行反馈，AUL-DFI中用一个bitmap来对所有的HARQ(Hybrid Automatic Repeat reQuest，混合自动重传请求)进程进行反馈。
在进行AUL传输时，基站会配置AUL传输可以使用的HARQ-ID集合，用户设备在该集合中选择一个HARQ-ID，确定NDI(New Data Indicator，新数据指示)和RV(冗余版本)，并通过UCI(Uplink Control Information，上行控制信息)告诉基站，UE-ID也会包含在UCI中。UCI会和AUL PUSCH(Physical Uplink Shared Channel，物理上行共享信道)一起发送给基站，基站接收到UCI和PUSCH后，会先对UCI解码，通过UCI知道UE-ID、HARQ-ID、NDI、RV等信息后，再对PUSCH进行解码。
AUL支持两种重传方式：基于调度的重传和AUL重传。其中，基于调度的重传指的是，当用户设备收到一个上行调度(UL grant)，该上行调度指示的HARQ-ID、TBS、NDI与之前的某一个AUL传输完全一致，则用户设备会在上行调度指示时频资源上对该传输块进行 基于调度的重传；AUL重传(也即免调度的重传)指的是，用户设备收到AUL-DFI指示某一个HARQ进行为NACK，或者某一个HARQ进程的传输块传输后一段时间没有收到任何基站的上行调度信息或AUL-DFI，则此时用户设备也可以采用AUL重传的重传方式。
LTE通常采用单比特HARQ-ACK反馈方案，而eMBB业务为了高速率传输，每个传输块比特数较大，每个传输块中码块(Code Block，CB)个数可能是LTE的数倍，假如采用LTE的单比特HARQ-ACK反馈方案，则在信道质量较差的情况下、或者在eMBB和URLLC复用的场景下，eMBB业务被URLLC业务抢占，使得部分码块出错导致解码错误时，需要重传整个传输块，这将会导致数据吞吐量和频谱效率严重下降。
为了提高频谱效率，5G引入CBG(Code Block Group)重传，采用CBG HARQ-ACK反馈方案，将一个传输块分成若干个CBG，每个CBG包括一个或多个码块，当一个传输块中的部分码块出错时，只重传所出错码块所在的CBG而不是重传整个传输块。
如果用户设备在某个服务小区配置了RRC参数codeBlockGroupTransmission，且通过RRC参数maxCodeBlockGroupsPerTransportBlock配置了该服务小区传输块所包含的CBG数目的最大值
Figure PCTCN2019096785-appb-000001
用户设备需要反馈
Figure PCTCN2019096785-appb-000002
个HARQ-ACK比特。
对于一个传输块所包含的码块数为C，用户设备觉得CBG数目通过公式
Figure PCTCN2019096785-appb-000003
前
Figure PCTCN2019096785-appb-000004
个CBG包含
Figure PCTCN2019096785-appb-000005
个码块，其中CBG n CBG,
Figure PCTCN2019096785-appb-000006
包含的码块为
Figure PCTCN2019096785-appb-000007
后
Figure PCTCN2019096785-appb-000008
个CBG包含
Figure PCTCN2019096785-appb-000009
个码块，其中CBG
Figure PCTCN2019096785-appb-000010
包含CBs为
Figure PCTCN2019096785-appb-000011
用户设备用
Figure PCTCN2019096785-appb-000012
个HARQ-ACK信息比特通过1对1的方式来反馈
Figure PCTCN2019096785-appb-000013
个CBG。若用户设备收到2个传输块，则将2个传输块的HARQ-ACK一起反馈前面的比特对应第一个传输块，后面的比特对应第二个传输块。
重传的传输块中的CBG和初传传输块中对应的CBG所包含的CB相同。
如果用户设备的RRC参数HARQ-ACK-codebook＝semi-static，HARQ-ACK码本包含
Figure PCTCN2019096785-appb-000014
个HARQ-ACK信息比特，对于某个传输块如果
Figure PCTCN2019096785-appb-000015
用户设备会在最后
Figure PCTCN2019096785-appb-000016
个信息比特发送NACK。
如果用户设备收到一个PDSCH是由DCI格式1_0调度的，用户设备只对该PDSCH中的传输块产生HARQ-ACK信息。
如果用户设备没有配置RRC参数codeBlockGroupTransmission，用户设备会对每个传输块产生一个比特的HARQ-ACK信息。
如图0所示的CBG重传机制示意图，对于下行传输，用户设备在某个服务小区的RRC参数CBG-DL＝ON，当用户设备通过RRC参数maxCodeBlockGroupsPerTransportBlock配置了该服务小区传输块所包含的CBG数目的最大值
Figure PCTCN2019096785-appb-000017
为4，用户设备需要反馈4个HARQ-ACK比特。
图0中一个传输块由10个码块组成，编号分别为0,1,2，…,9。码块数目大于
Figure PCTCN2019096785-appb-000018
这10个码块被分为了4个CBG，CBG0、CBG1包含3个码块，CBG2、CBG3包含2个码块。当CB0解码错误其他码块正确解码时，用户设备反馈的HARQ-ACK为0111，基站成功解码用户设备反馈的HARQ-ACK后只重传CB0所在的CBG，即CBG0。只有CBG0所包含的码块(CB0、CB1、CB2)需要重传，CBG重传与初传采用相同的CBG分组方式。
目前，5G新空口也在对非授权频段(unlicensed band)进行标准化的工作，与LTE feLAA中类似，5G新空口也可以采用免调度的方 式来发送PUSCH。5G新空口的非授权频段在NR configured grant基站上来研究免调度的上行传输。
与LTE feLAA一样，在5G新空口的非授权频段中，将HARQ process ID、NDI、RVID通过UCI的方式告诉基站，5G新空口的非授权频段同样支持DFI来对上行数据进行反馈。与LTE feLAA不同，5G新空口的非授权频段并没有在UCI中包含UEID的信息，UEID在5G新空口的非授权频段中通过UE specific DMRS来进行区分，UE specific DMRS是5G新空口中的一种用户特定参考信号。
注：一个传输块在传输时有一个对应的HARQ-ID；一个传输块分成多个CBG。
发明内容
本发明解决的技术问题是：在5G新空口的非授权频段中，对于AUL传输的数据传输方式，如何获得IR增益(尤其是针对DFI比特数受限的情形下的CBG级反馈方法)。
为了解决上述技术问题，本发明实施例提供一种数据传输方法，包括：
在5G新空口的非授权频段中，用户设备通过AUL传输的方式向基站发送上行数据及相关联的UCI；
基站通过UE specific DMRS来识别发送所述上行数据的用户设备；
基站对UCI进行解码；
在UCI成功解码的情况下，基站对所述上行数据进行解码；
根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置；
用户设备接收到DFI；
用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；
用户设备进行免调度的重传。
可选的，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
可选的，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
可选的，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
可选的，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
为了解决上述技术问题，本发明实施例还提供一种数据传输方法，包括：
在5G新空口的非授权频段中，通过AUL传输的方式向基站发送上行数据及相关联的UCI，基站能够通过UE specific DMRS来识别发送所述上行数据的用户设备；
接收到DFI，所述DFI中包括第一信息；
通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；
进行免调度的重传。
可选的，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
可选的，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
可选的，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
可选的，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
为了解决上述技术问题，本发明实施例还提供一种数据传输方法，包括：
在5G新空口的非授权频段中，通过AUL传输的方式接收到用户设备发送的上行数据及相关联的UCI；
通过UE specific DMRS来识别发送所述上行数据的用户设备；
对UCI进行解码；
在UCI成功解码的情况下，对所述上行数据进行解码；
根据传输块或CBG的解码是否成功，向所述用户设备发送DFI，所述DFI中包括第一信息，用户设备能够根据所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号。
可选的，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级 HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
可选的，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
可选的，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
可选的，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
为了解决上述技术问题，本发明实施例还提供一种数据传输装置，包括：上行数据发送单元、下行数据接收单元、解析单元和上行数据重传单元；其中：
上行数据发送单元，适于在5G新空口的非授权频段中，通过AUL传输的方式向基站发送上行数据及相关联的UCI，基站能够通过UE specific DMRS来识别发送所述上行数据的用户设备；
下行数据接收单元，适于接收到DFI，所述DFI中包括第一信息；
解析单元，适于所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；
上行数据重传单元，适于进行免调度的重传。
可选的，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
可选的，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成 功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
可选的，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
可选的，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
为了解决上述技术问题，本发明实施例还提供一种数据传输装置，包括：上行数据接收单元、识别单元、解码单元和指示单元；其中：
上行数据接收单元，适于在5G新空口的非授权频段中，通过AUL传输的方式接收到用户设备发送的上行数据及相关联的UCI；
识别单元，适于通过UE specific DMRS来识别发送所述上行数据的用户设备；
解码单元，适于对UCI进行解码；在UCI成功解码的情况下，对所述上行数据进行解码；
指示单元，适于根据传输块或CBG的解码是否成功，向所述用户设备发送DFI，所述DFI中包括第一信息，用户设备能够根据所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号。
可选的，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
可选的，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该 CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
可选的，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
可选的，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
为了解决上述技术问题，本发明实施例还提供一种用户设备，所述用户设备支持5G新空口的非授权频段，所述用户设备还包括如上所述的数据传输装置。
为了解决上述技术问题，本发明实施例还提供一种基站，所述基站支持5G新空口的非授权频段，所述基站还包括如上所述的数据传输装置。
与现有技术相比，本发明的技术方案具有以下有益效果：
在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括 一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
附图说明
图0为本发明背景技术中CBG重传机制示意图；
图1为本发明实施例一中数据传输方法流程图；
图2为本发明实施例二中数据传输方法流程图；
图3为本发明实施例三中数据传输方法流程图；
图4为本发明实施例四中数据传输装置结构框图；
图5为本发明实施例五中数据传输装置结构框图。
具体实施方式
在UCI正确解码的情况下，基站可以在DFI中用一个比特来告诉用户设备。当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
当5G新空口的非授权频段中的上行免调度传输配置了CBG传输，基站可以在DFI中反馈CBG级的HARQ-ACK，用户设备可以通过DFI的CBG的HARQ-ACK反馈来确定需要重传的CBG，从而提高频谱利用率。
此处遇到的一个问题是，feLAA中对于一个传输块的场景，AUL-DFI中包含16比特的HARQ-ACK Bitmap和2比特TPC。5G新空口的非授权频段中DFI至少也需要包含这些信息。当5G新空口的非授权频段中上行免调度传输支持CBG时，DFI也应该引入CBG级的反馈。5G新空口的非授权频段中每个传输块最大可以配8个 CBG，16个HARQ进行需要128个比特来反馈。
但是，5G新空口的非授权频段中DFI的比特数是受到限制的(可能需要和某一个DCI格式复用，以减少用户设备盲检的复杂度)，无法无限制的扩展。
为此，发明人设计了本发明的技术方案，一种针对DFI比特数受限的情形下的CBG级反馈方法，在UCI成功解码的情况下，基站对所述上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，从而实现了免调度的重传。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
为使本领域技术人员更好地理解和实现本发明，以下参照附图，通过具体实施例进行详细说明。
实施例一
如下所述，本发明实施例提供一种数据传输方法。
首先，本实施例中的数据传输方法，适用于5G新空口的非授权频段中，基站与用户设备之间通过AUL传输的方式进行数据传输。
参照图1所示的数据传输方法流程图，以下通过具体步骤进行详细说明：
S101，用户设备通过AUL传输的方式向基站发送上行数据及相关联的UCI。
在5G新空口的非授权频段中，用户设备通过AUL传输的方式向基站发送上行数据及相关联的UCI。
所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
在5G新空口的非授权频段中，用户设备在进行先听后发并成功后，在预配置的资源上采用免调度的方式发送上行数据，与该数据相关联的HARQ-ID、NDI、RVID会同时在UCI中上报，UCI会piggyback到PUSCH上发送，数据发送后用户设备会启动一个计时器。
S102，基站通过UE specific DMRS来识别发送所述上行数据的用户设备。
基站收到用户设备发送的上行数据及控制信息后，基站通过UE specific DMRS来获得发送所述上行数据的用户设备的UE-ID。
S103，基站对UCI进行解码。
基站通过对UCI进行解码来获得HARQ-ID、NDI、RVID。
基站在DFI中用一个比特来告诉用户设备是否解码成功。
在UCI未能成功解码的情况下，执行步骤S104。
S104，基站对所述上行数据进行解码。
基站对所述上行数据进行解码；根据传输块或CBG的解码是否成功，DFI中还需要包括后续步骤S105中的传输块级HARQ-ACK反馈和/或CBG级HARQ-ACK反馈等，而在UCI成功解码的情况下，则不再需要传输块级HARQ-ACK反馈和/或CBG级HARQ-ACK反馈。
当然，也不排除不给用户设备发送与该数据相关联HARQ-ID调度信息或者HARQ-ACK反馈信息的可能性，此时，若用户设备在计时器超时后没有收到与该HARQ-ID相关联的ACK反馈也没有收到 该HARQ-ID相关联的调度信息后，用户设备可以采用以免调度的方式重传该数据。
S105，基站向所述用户设备发送DFI，所述DFI中包括第一信息。
在UCI未能成功解码的情况下，基站向所述用户设备发送DFI，所述DFI中包括第一信息。
所述第一信息用于指示成功解码的CBG所在的位置。
所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
大部分情况下，所述第一信息可以不包括：所含所有CBG均成功解码的传输块/传输块组的HARQ/HARQ组的CBG级HARQ-ACK反馈。
基站指示重传数据具体可以有多种不同的方式，例如：
如前所述，5G新空口的非授权频段中，用户设备在LBT成功后，在预配置的资源上采用免调度的方式发送上行数据，与该数据相关联的HARQ-ID、NDI、RVID会同时在UCI中上报，UCI会piggyback到PUSCH上发送，数据发送后用户设备会启动一个计时器。基站收到用户设备发送的上行数据及控制信息后，基站通过UE-specific DMRS来获得UE-ID，然后通过解UCI来获得HARQ-ID、NDI、RVID，当UCI没有成功解码时，可以通过DFI对没有解对的HARQ-ID反馈NACK，并且在DFI中用一个比特来指示用户设备出现了UCI没有成功解码的情况(或者也可以指示用户设备在免调度重传时，发送与上一次传输相同的RV版本)。
若用户设备在某HARQ-ID相关联的定时器超时后没有收到与该HARQ-ID相关联的ACK反馈也没有收到该HARQ-ID相关联的调度信息后，用户设备可以采用以免调度的方式重传该数据。
实例1：用户设备在slot 0LBT成功，采用免调度的方式连续发送PUSCH和UCI。在slot 0发送的PUSCH的HARQ-ID为0，在slot1发送的PUSCH的HARQ-ID为1，在slot 2发送的PUSCH的HARQ-ID为2。均采用RVID为0。
用户设备侧免调度重传计时器为10ms，此时采用15KHz SCS,一个slot时间长度为1ms。免调度重传计时器从每个HARQ-ID对应的PUSCH发送之后开始计时。对HARQ-ID 0，免调度重传计时器从slot1开始计时；对HARQ-ID 1，免调度重传计时器从slot 2开始计时；对HARQ-ID 2，免调度重传计时器从slot 3开始计时。
假设基站在slot 0,1,2接收到了用户设备采用免调度的方式发送的PUSCH和UCI，基站通过UE specific DMRS获得了UE-ID的信息，基站解slot0,1的UCI和PUSCH均解码成功，但是基站在解码slot 2收到的UCI时解码出错。
基站在slot 7LTB成功，采用DFI给用户设备反馈HARQ-ACK，则其中HARQ-ID的bitmap为1100000000000000，UCI解码错误(或重传相同RV指示)为1。
用户设备在slot 7收到了DFI，通过HARQ-ID的bitmap知道HARQ-ID 0和1成功解码，其他HARQ-ID解码错误。由于本实施例中用户设备仅发送了HARQ-ID 0,1，2，因此用户设备进一步确定解码错误的HARQ-ID为2。DFI中UCI解码错误(或重传相同RV指示)为1，用户设备在对HARQ-ID进行免调度的重传时会选择与前一次传输相同的RVID即RVID为0。
如前所述，feLAA中对于一个传输块的场景，AUL-DFI中包含16比特的HARQ-ACK Bitmap和2比特TPC。5G新空口的非授权频段中DFI至少也需要包含这些信息。当5G新空口的非授权频段中上行免调度传输支持CBG时，DFI也应该引入CBG级的反馈。5G新空口的非授权频段中每个传输块最大可以配8个CBG，16个HARQ进行需要128个比特来反馈。
但是，5G新空口的非授权频段中DFI的比特数是受到限制的(可能需要和某一个DCI格式复用，以减少用户设备盲检的复杂度)，无法无限制的扩展。对此，本发明采用以下方式来克服上述缺陷：
方式一，传输块级HARQ-ACK反馈+部分CBG级HARQ-ACK反馈。
将所有可用的HARQ进程分为M组，基站根据收到的PUSCH的解码情况及HARQ-ID，选择其中的一组来反馈CBG级HARQ-ACK。M需要满足以下约束条件：
Figure PCTCN2019096785-appb-000019
其中N HARQ-ID为免调度可用的总的HARQ进程数，N CBG为基站配置用于免调度上行传输的最大CBG数量。M由基站通过高层信令配置给用户设备或者由协议定义一个默认值。每一组中HARQ进程可以通过高层信令配置，也可以通过预定义的分组方式。
在其它实施例中，传输块级HARQ-ACK反馈为可选项，DFI中可以包含传输块级HARQ-ACK反馈也可以不包含传输块级HARQ-ACK反馈，是否包含传输块级HARQ-ACK反馈会影响可用于CBG级的反馈的比特数。
对于上述方式一具体可以有以下实例：
实例2：可用进程数为16，基站配置用于免调度上行传输的最大CBG数目为4，DFI使用传输块级的HARQ-ACK bitmap反馈所有HARQ进程的传输块级HARQ-ACK，DFI中可以用于CBG级HARQ-ACK反馈的比特数为27。根据方式一中的公式可以确定M的最小值为3。
基站通过高层信令配置M为4，16个HARQ进程均为可用，第一组中可用的HARQ进程为0,1,2,3；第二组中可用的HARQ进程为4,5,6,7；第三组中可用的HARQ进程为8,9,10,11；第四组中可用的HARQ进程为12,13,14,15。DFI中用2比特来指示反馈的是哪一组的 HARQ-ACK，00表示第一组，01表示第二组，10表示第三组，11表示第四组。
用户设备在slot 0LBT成功，采用免调度的方式连续发送PUSCH和UCI。在slot 0发送的PUSCH的HARQ-ID为0，在slot 1发送的PUSCH的HARQ-ID为1，在slot 2发送的PUSCH的HARQ-ID为2。均采用RVID为0。
用户设备侧免调度重传计时器为10ms，此时采用15KHz SCS，一个slot时间长度为1ms。免调度重传计时器从每个HARQ-ID对应的PUSCH发送之后开始计时。对HARQ-ID 0，免调度重传计时器从slot 1开始计时；对HARQ-ID 1，免调度重传计时器从slot 2开始计时；对HARQ-ID 2，免调度重传计时器从slot 3开始计时。
假设基站在slot 0,1,2接收到了用户设备采用免调度的方式发送的PUSCH和UCI，基站通过UE specific DMRS获得了UE-ID的信息，基站解slot0,1的UCI和PUSCH均解码成功，但是基站在解码slot 2时，其中的CBG 0和1解错了，CBG 2和3解对了。
基站在slot 7LTB成功，采用DFI给用户设备反馈HARQ-ACK，则其中传输块级HARQ-ID的bitmap为1100000000000000，CBG级的反馈信息为001111111100110000。其中前2个比特(即“00”)表示第一组，后16个比特表示CBG级的HARQ-ACK反馈bitmap。
用户设备在slot 7收到了DFI，从中可以知道HARQ-ID 0和1成功解码，HARQ-ID 2的CBG 0和1解错了，CBG 2和3解对了。用户设备在进行免调度重传时，可以只对HARQ-ID 2重传CBG 0和1。
方式二，传输块级HARQ-ACK反馈+CBG级HARQ-ACK反馈。
将所有可用的HARQ进程分为M组，基站根据收到的PUSCH的解码情况及HARQ-ID，选择其中的一组来反馈CBG级HARQ-ACK。M需要满足以下约束条件：
(M×N CBG)≤N
N CBG为基站配置用于免调度上行传输的最大CBG数量。M由基站通过高层信令配置给用户设备或者由协议定义一个默认值。每一组中HARQ进程可以通过高层信令配置，也可以通过预定义的分组方式。
DFI的CBG级HARQ-ACK反馈将每一组中所有传输块对应的CBG做逻辑与。DFI中CBG级HARQ-ACK的反馈比特为M×N CBG。
在其它实施例中，传输块级HARQ-ACK反馈为可选项，DFI中可以包含传输块级HARQ-ACK反馈，也可以不包含传输块级HARQ-ACK反馈，是否包含传输块级HARQ-ACK反馈会影响可用于CBG级的反馈的比特数。
对于上述方式二具体可以有以下实例：
实例3：可用进程数为16，基站配置用于免调度上行传输的最大CBG数目为4，DFI使用传输块级的HARQ-ACK bitmap反馈所有HARQ进程的传输块级HARQ-ACK，DFI中可以用于CBG级HARQ-ACK反馈的比特数为27.根据方式二中的公式可以确定M的最大值为6。
基站通过高层信令配置M为4，16个HARQ进程均为可用，第一组中可用的HARQ进程为0,1,2,3；第二组中可用的HARQ进程为4,5,6,7；第三组中可用的HARQ进程为8,9,10,11；第一组中可用的HARQ进程为12,13,14,15。DFI中用2比特来指示反馈的是哪一组的HARQ-ACK，00表示第一组，01表示第二组，10表示第三组，11表示第四组。
用户设备在slot 0LBT成功，采用免调度的方式连续发送PUSCH和UCI。在slot 0发送的PUSCH的HARQ-ID为0，在slot 1发送的PUSCH的HARQ-ID为1，在slot 2发送的PUSCH的HARQ-ID为2。均采用RVID为0。
用户设备侧免调度重传计时器为10ms，此时采用15KHz SCS， 一个slot时间长度为1ms。免调度重传计时器从每个HARQ-ID对应的PUSCH发送之后开始计时。对HARQ-ID 0，免调度重传计时器从slot 1开始计时；对HARQ-ID 1，免调度重传计时器从slot 2开始计时；对HARQ-ID 2，免调度重传计时器从slot 3开始计时。
假设基站在slot 0,1,2接收到了用户设备采用免调度的方式发送的PUSCH和UCI，基站通过UE specific DMRS获得了UE-ID的信息，基站解slot0,1的UCI和PUSCH均解码成功，但是基站在解码slot 2时，CBG 0和1解错了，CBG 2和3解对了。
基站在slot 7LTB成功，采用DFI给用户设备反馈HARQ-ACK，则其中传输块级的HARQ-ID的bitmap为1100000000000000，CBG级的HARQ-ACK反馈为0011000000000000。
用户设备在slot 7收到了DFI，通过传输块级的HARQ-ACK可以知道HARQ-ID 0和1成功解码，HARQ-ID 2没有成功解码。通过CBG级的HARQ-ACK反馈进一步确定HARQ-ID 2的CBG 0和1解错了，CBG 2和3解对了。用户设备在进行免调度重传时，可以只对HARQ-ID 2重传CBG 0和1。
传输块级的HARQ-ACK反馈是可选项，在另一个实施例中，也可以仅采用CBG级HARQ-ACK反馈。有以下实例：
实例4：可用进程数为16，基站配置用于免调度上行传输的最大CBG数目为4，DFI不使用传输块级的HARQ-ACK bitmap反馈所有HARQ进程的传输级HARQ-ACK，DFI中可以用于CBG级HARQ-ACK反馈的比特数为27。根据方法二中的公式可以确定M的最大值为6。
基站通过高层信令配置M为4，16个HARQ进程均为可用，第一组中可用的HARQ进程为0,1,2,3；第二组中可用的HARQ进程为4,5,6,7；第三组中可用的HARQ进程为8,9,10,11；第一组中可用的HARQ进程为12,13,14,15。DFI中用2比特来指示反馈的是哪一组的 HARQ-ACK，00表示第一组，01表示第二组，10表示第三组，11表示第四组。
用户设备在slot 0LBT成功，采用免调度的方式连续发送PUSCH和UCI。在slot 0发送的PUSCH的HARQ-ID为0，在slot 1发送的PUSCH的HARQ-ID为4，在slot 2发送的PUSCH的HARQ-ID为8。均采用RVID为0。
用户设备侧免调度重传计时器为10ms，此时采用15KHz SCS,一个slot时间长度为1ms。免调度重传计时器从每个HARQ-ID对应的PUSCH发送之后开始计时。对HARQ-ID 0，免调度重传计时器从slot1开始计时；对HARQ-ID 4，免调度重传计时器从slot 2开始计时；对HARQ-ID 8，免调度重传计时器从slot 3开始计时。
假设基站在slot 0,1,2接收到了用户设备采用免调度的方式发送的PUSCH和UCI，基站通过UE specific DMRS获得了UE-ID的信息，基站解slot0,1的UCI和PUSCH均解码成功，但是基站在解码slot 2时，解码CBG 0和1解错了，CBG 2和3解对了。
基站在slot 7 LTB成功，采用DFI给用户设备反馈HARQ-ACK，则CBG级的HARQ-ACK反馈为1111111100110000。
用户设备在slot 7收到了DFI，通过CBG级的HARQ-ACK可以知道第一组和第二组的HARQ-ID成功解码，第三组的CBG 0和1解错了，CBG 2和3解对了。用户设备根据自己发送的HARQ-ID信息进一步确定HARQ-ID 0和1成功解码，HARQ-ID 2没有成功解码。HARQ-ID 2的CBG 0和1解错了，CBG 2和3解对了。用户设备在进行免调度重传时，可以只对HARQ-ID 2重传CBG 0和1。
方式三，传输块级HARQ-ACK反馈+部分CBG级HARQ-ACK反馈
基站根据收到的PUSCH的解码情况及HARQ-ID，选择其中的最多P个来反馈CBG级HARQ-ACK。P需要满足以下约束条件
Figure PCTCN2019096785-appb-000020
其中，N HARQ-ID为免调度可用的总的HARQ进程数，N CBG为基站配置用于免调度上行传输的最大CBG数量。P由基站通过高层信令配置给用户设备或者由协议定义一个默认值。
DFI中包含传输块级HARQ-ACK反馈。CBG级的HARQ-ACK反馈比特数为
Figure PCTCN2019096785-appb-000021
对于上述方式三具体可以有以下实例：
实例5：可用进程数为16，基站配置用于免调度上行传输的最大CBG数目为4，DFI使用传输块级的HARQ-ACK bitmap反馈所有HARQ进程的传输块级HARQ-ACK，DFI中可以用于CBG级HARQ-ACK反馈的比特数为27。根据方法三中的公式可以确定P的最大值为3。
用户设备在slot 0 LBT成功，采用免调度的方式连续发送PUSCH和UCI。在slot 0发送的PUSCH的HARQ-ID为0，在slot 1发送的PUSCH的HARQ-ID为1，在slot 2发送的PUSCH的HARQ-ID为2。均采用RVID为0。
用户设备侧免调度重传计时器为10ms，此时采用15KHz SCS，一个slot时间长度为1ms。免调度重传计时器从每个HARQ-ID对应的PUSCH发送之后开始计时。对HARQ-ID 0，免调度重传计时器从slot 1开始计时；对HARQ-ID 1，免调度重传计时器从slot 2开始计时；对HARQ-ID 2，免调度重传计时器从slot 3开始计时。
假设基站在slot 0,1,2接收到了用户设备采用免调度的方式发送的PUSCH和UCI，基站通过UE specific DMRS获得了UE-ID的信息，基站解slot0,1的UCI和PUSCH均解码成功，但是基站在解码slot 2时，CBG 0和1解错了，CBG 2和3解对了。
基站在slot 7LTB成功，采用DFI给用户设备反馈HARQ-ACK，则传输块级HARQ-ID的bitmap为1100000000000000，CBG级的反 馈信息为001000110100000010000000。24个比特分为3组，每一组的前4比特指示HARQ-ID，后4比特指示具体的CBG级HARQ-ACK。前四个比特0010表示HARQ-ID为2，第5-8个比特0011表示CBG 0和1解错了，CBG 2和3解对了。
用户设备在slot 7收到了DFI，从中可以知道HARQ-ID 0和1成功解码，HARQ-ID 2的CBG 0和1解错了，CBG 2和3解对了。用户设备在进行免调度重传时，可以只对HARQ-ID2重传CBG 0和1。
在此基础上，可以采用CBG bundling(捆绑)的方式来进一步减少HARQ-ACK反馈所需的比特数。具体的，
形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否需要重传，若一个CBG组合中任意一个CBG需要重传，则指示该CBG组合需要重传，若一个CBG组合中所有CBG均不需要重传，则指示该CBG组合不需要重传。
关于如何确定每个HARQ进程反馈的比特数：
A.将可用的HARQ进程分为2组，第一组中的HARQ进程数量为N mod N HARQ-ID；第二组中进程数量为N HARQ-ID-N mod N HARQ-ID。第一组中对于每个HARQ进程反馈的比特数为
Figure PCTCN2019096785-appb-000022
第二组中对于每个HARQ进程反馈的比特数为
Figure PCTCN2019096785-appb-000023
CBG级的HARQ-ACK反馈比特为N。
B.HARQ也可以不进行分组，对于每个HARQ进程反馈的比特数为
Figure PCTCN2019096785-appb-000024
CBG级的HARQ-ACK反馈比特为
Figure PCTCN2019096785-appb-000025
其中，N HARQ-ID为免调度可用的总的HARQ进程数，N CBG为基站配置用于免调度上行传输的最大CBG数量。
根据每个HARQ进程反馈的比特数(X)将每个进程对应的传输块的CBG分为X组。分组后满足以下约束条件：前一组的CBG数 目不小于后一组的CBG数目，前一组的CBG数目和后一组的CBG数目只差不大于1。每组中的CBG的HARQ-ACK反馈做逻辑与运算。
对于CBG bundling可以有以下实例：
实例6：基站给用户设备配置的可用进程数为8，分别为0,1,2,3,4,5,6,7。基站配置用于免调度上行传输的最大CBG数量为4，DFI中可以用于CBG级HARQ-ACK反馈的比特数为27。
根据上述B中的公式，对于每个HARQ进程反馈的比特数为
Figure PCTCN2019096785-appb-000026
将CBG分为3组，第一组包含CBG 0,1；第二组包含CBG 2；第三组包含CBG 3。同组内的CBG要做bundling，即第一组的CBG 0和1做bundling；第二组和第三组不需要做bundling。
用户设备在slot 0LBT成功，采用免调度的方式连续发送PUSCH和UCI。在slot 0发送的PUSCH的HARQ-ID为0，在slot 1发送的PUSCH的HARQ-ID为1，在slot 2发送的PUSCH的HARQ-ID为2。均采用RVID为0。
用户设备侧免调度重传计时器为10ms，此时采用15KHz SCS，一个slot时间长度为1ms。免调度重传计时器从每个HARQ-ID对应的PUSCH发送之后开始计时。对HARQ-ID 0，免调度重传计时器从slot 1开始计时；对HARQ-ID 1，免调度重传计时器从slot 2开始计时；对HARQ-ID 2，免调度重传计时器从slot 3开始计时。
假设基站在slot 0,1,2接收到了用户设备采用免调度的方式发送的PUSCH和UCI，基站通过UE specific DMRS获得了UE-ID的信息，基站解slot0,1的UCI和PUSCH均解码成功，但是基站在解码slot 2时，CBG 0和2，解错了，CBG 1和3解对了。
基站在slot 7LTB成功，则采用DFI给用户设备反馈CBG级的HARQ-ACK，111111001000000000000000，共24比特。
用户设备在slot 7收到了DFI，从中可以知道HARQ-ID 0和1成功解码，HARQ-ID的CBG 0，1和2解错了，CBG 3解对了。UE在进行免调度重传时，可以只对HARQ-ID 2重传CBG 0，1和2。
可选的，在基站给所述用户设备配置了多个免调度的资源，且所述用户设备能够同时使用所述多个免调度的资源来发送上行数据的情况下，基站在DCI中指示是哪一个资源。
若基站给用户设备配置的可同时发送PUSCH的免调度的资源数量为N，则DCI中需要
Figure PCTCN2019096785-appb-000027
个比特来指示基站接收到的是哪一个免调度的资源。
S106，用户设备接收到DFI。
如前所述，所述DFI中包括第一信息。
S107，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号。
S108，用户设备进行免调度的重传。
通过以上对技术方案的描述可以看出：本实施例中，在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
实施例二
如下所述，本发明实施例提供一种数据传输方法，该方法通常可以由用户设备来实施。
参照图2所示的数据传输方法流程图，与实施例一相同或相似的部分此处不再赘述。
S201，通过AUL传输的方式向基站发送上行数据及相关联的UCI。
在5G新空口的非授权频段中，用户设备通过AUL传输的方式向基站发送上行数据及相关联的UCI，基站能够通过UE specific DMRS来识别发送所述上行数据的用户设备。
所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
S202，接收到DFI。
用户设备接收到DFI，所述DFI中包括第一信息。
可选的，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
可选的，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成 功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
S203，通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号。
S204，进行免调度的重传。
通过以上对技术方案的描述可以看出：本实施例中，在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
实施例三
如下所述，本发明实施例提供一种数据传输方法，该方法通常可以由基站来实施。
参照图3所示的数据传输方法流程图，与实施例一相同或相似的部分此处不再赘述。
S301，通过AUL传输的方式接收到用户设备发送的上行数据及相关联的UCI。
在5G新空口的非授权频段中，基站通过AUL传输的方式接收到用户设备发送的上行数据及相关联的UCI。
所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
S302，通过UE specific DMRS来识别发送所述上行数据的用户设备。
S303，对UCI进行解码。
S304，在UCI成功解码的情况下，对所述上行数据进行解码。
S305，根据传输块或CBG的解码是否成功，向所述用户设备发送DFI，所述DFI中包括第一信息。
可选的，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
可选的，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
通过以上对技术方案的描述可以看出：本实施例中，在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE  specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
实施例四
如下所述，本发明实施例提供一种数据传输装置。
参照图4所示的数据传输装置结构框图。
所述数据传输装置包括：上行数据发送单元401、下行数据接收单元402、解析单元403和上行数据重传单元404；其中各单元的主要功能如下：
上行数据发送单元401，适于在5G新空口的非授权频段中，通过AUL传输的方式向基站发送上行数据及相关联的UCI，基站能够通过UE specific DMRS来识别发送所述上行数据的用户设备；
下行数据接收单元402，适于接收到DFI，所述DFI中包括第一信息；
解析单元403，适于通过所述第一信息来确定需要重传的CBG 所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；
上行数据重传单元404，适于进行免调度的重传。
通过以上对技术方案的描述可以看出：本实施例中，在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
在具体实施中，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还可以包括：进行先听后发并成功。
在具体实施中，所述UCI中可以包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
在具体实施中，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
在具体实施中，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
实施例五
如下所述，本发明实施例提供一种数据传输装置。
参照图5所示的数据传输装置结构框图。
所述数据传输装置包括：上行数据接收单元501、识别单元502、解码单元503和指示单元504；其中各单元的主要功能如下：
上行数据接收单元501，适于在5G新空口的非授权频段中，通过AUL传输的方式接收到用户设备发送的上行数据及相关联的UCI；
识别单元502，适于通过UE specific DMRS来识别发送所述上行数据的用户设备；
解码单元503，适于对UCI进行解码；在UCI成功解码的情况下，对所述上行数据进行解码；
指示单元504，适于根据传输块或CBG的解码是否成功，向所述用户设备发送DFI，所述DFI中包括第一信息，用户设备能够根据所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号。
通过以上对技术方案的描述可以看出：本实施例中，在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一 信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
在具体实施中，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还可以包括：进行先听后发并成功。
在具体实施中，所述UCI中可以包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
在具体实施中，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
在具体实施中，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
实施例六
如下所述，本发明实施例提供一种用户设备。
所述用户设备支持5G新空口的非授权频段。与现有技术的不同之处在于，该用户设备还包括如本发明实施例四中所提供的数据传输 装置。因而该用户设备能够在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
实施例七
如下所述，本发明实施例提供一种基站。
所述基站支持5G新空口的非授权频段。与现有技术的不同之处在于，该基站还包括如本发明实施例五中所提供的数据传输装置。因而该基站能够在5G新空口的非授权频段中，对于AUL传输的数据传输方式，基站通过UE specific DMRS来识别发送上行数据的用户设备，在UCI成功解码的情况下，对上行数据进行解码，根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置，用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号，从而实现免调度的重传，当用户设备收到该指示后，对于 反馈NACK的PUCSH的免调度重传会选择与前一次传输相同的RV，如果DFI中指示没有需要重传的情况发生，则用户设备可以选择其他的RV版本，从而获得IR增益。
进一步地，对于DFI比特数受限的情形，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块，从而实现了在DFI比特数受限的情形下的CBG级反馈。
本领域普通技术人员可以理解，上述实施例的各种方法中，全部或部分步骤是可以通过程序指令相关的硬件来完成的，该程序可以存储于一计算机可读存储介质中，存储介质可以包括：ROM、RAM、磁盘或光盘等。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (27)

  1. 一种数据传输方法，其特征在于，包括：
    在5G新空口的非授权频段中，用户设备通过AUL传输的方式向基站发送上行数据及相关联的UCI；
    基站通过UE specific DMRS来识别发送所述上行数据的用户设备；
    基站对UCI进行解码；
    在UCI成功解码的情况下，基站对所述上行数据进行解码；
    根据传输块或CBG的解码是否成功，基站向所述用户设备发送DFI，所述DFI中包括第一信息，所述第一信息用于指示成功解码的CBG所在的位置；
    用户设备接收到DFI；
    用户设备通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；
    用户设备进行免调度的重传。
  2. 如权利要求1所述的数据传输方法，其特征在于，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
  3. 如权利要求1所述的数据传输方法，其特征在于，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
  4. 如权利要求1所述的数据传输方法，其特征在于，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
  5. 如权利要求1所述的数据传输方法，其特征在于，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
  6. 一种数据传输方法，其特征在于，包括：
    在5G新空口的非授权频段中，通过AUL传输的方式向基站发送上行数据及相关联的UCI，基站能够通过UE specific DMRS来识别发送所述上行数据的用户设备；
    接收到DFI，所述DFI中包括第一信息；
    通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；
    进行免调度的重传。
  7. 如权利要求6所述的数据传输方法，其特征在于，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
  8. 如权利要求6所述的数据传输方法，其特征在于，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
  9. 如权利要求6所述的数据传输方法，其特征在于，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括： 进行先听后发并成功。
  10. 如权利要求6所述的数据传输方法，其特征在于，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
  11. 一种数据传输方法，其特征在于，包括：
    在5G新空口的非授权频段中，通过AUL传输的方式接收到用户设备发送的上行数据及相关联的UCI；
    通过UE specific DMRS来识别发送所述上行数据的用户设备；
    对UCI进行解码；
    在UCI成功解码的情况下，对所述上行数据进行解码；
    根据传输块或CBG的解码是否成功，向所述用户设备发送DFI，所述DFI中包括第一信息，用户设备能够根据所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号。
  12. 如权利要求11所述的数据传输方法，其特征在于，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
  13. 如权利要求11所述的数据传输方法，其特征在于，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
  14. 如权利要求11所述的数据传输方法，其特征在于，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
  15. 如权利要求11所述的数据传输方法，其特征在于，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
  16. 一种数据传输装置，其特征在于，包括：上行数据发送单元、下行数据接收单元、解析单元和上行数据重传单元；其中：
    上行数据发送单元，适于在5G新空口的非授权频段中，通过AUL传输的方式向基站发送上行数据及相关联的UCI，基站能够通过UE specific DMRS来识别发送所述上行数据的用户设备；
    下行数据接收单元，适于接收到DFI，所述DFI中包括第一信息；
    解析单元，适于通过所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号；
    上行数据重传单元，适于进行免调度的重传。
  17. 如权利要求16所述的数据传输装置，其特征在于，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
  18. 如权利要求16所述的数据传输装置，其特征在于，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
  19. 如权利要求16所述的数据传输装置，其特征在于，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
  20. 如权利要求16所述的数据传输装置，其特征在于，所述UCI中包 括与所述上行数据相关联的HARQ-ID、NDI、RVID。
  21. 一种数据传输装置，其特征在于，包括：上行数据接收单元、识别单元、解码单元和指示单元；其中：
    上行数据接收单元，适于在5G新空口的非授权频段中，通过AUL传输的方式接收到用户设备发送的上行数据及相关联的UCI；
    识别单元，适于通过UE specific DMRS来识别发送所述上行数据的用户设备；
    解码单元，适于对UCI进行解码；在UCI成功解码的情况下，对所述上行数据进行解码；
    指示单元，适于根据传输块或CBG的解码是否成功，向所述用户设备发送DFI，所述DFI中包括第一信息，用户设备能够根据所述第一信息来确定需要重传的CBG所在的传输块的HARQ-ID、以及需要重传的CBG在其所在的传输块的HARQ中的序号。
  22. 如权利要求21所述的数据传输装置，其特征在于，所述第一信息包括：传输块级HARQ-ACK反馈、以及未能成功解码的CBG所在的传输块或传输块组的CBG级HARQ-ACK反馈，其中，所述传输块组包括一个或多个传输块。
  23. 如权利要求21所述的数据传输装置，其特征在于，形成CBG组合，每个CBG组合包括一个或多个CBG，在CBG级HARQ-ACK反馈中，每个比特指示一个CBG组合是否成功解码，若一个CBG组合中任意一个CBG未能成功解码，则指示该CBG组合未能成功解码，若一个CBG组合中所有CBG均成功解码，则指示该CBG组合成功解码。
  24. 如权利要求21所述的数据传输装置，其特征在于，在所述通过AUL传输的方式向基站发送上行数据及相关联的UCI之前，还包括：进行先听后发并成功。
  25. 如权利要求21所述的数据传输装置，其特征在于，所述UCI中包括与所述上行数据相关联的HARQ-ID、NDI、RVID。
  26. 一种用户设备，所述用户设备支持5G新空口的非授权频段，其特征在于，包括权利要求16至20中任一项所述的数据传输装置。
  27. 一种基站，所述基站支持5G新空口的非授权频段，其特征在于，包括权利要求21至25中任一项所述的数据传输装置。
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