WO2018171737A1 - 一种数据传输方法和相关设备 - Google Patents

一种数据传输方法和相关设备 Download PDF

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Publication number
WO2018171737A1
WO2018171737A1 PCT/CN2018/080275 CN2018080275W WO2018171737A1 WO 2018171737 A1 WO2018171737 A1 WO 2018171737A1 CN 2018080275 W CN2018080275 W CN 2018080275W WO 2018171737 A1 WO2018171737 A1 WO 2018171737A1
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Prior art keywords
data
time unit
transmitted
repeatedly
time
Prior art date
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PCT/CN2018/080275
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English (en)
French (fr)
Inventor
郑娟
官磊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18770504.1A priority Critical patent/EP3579473B1/en
Priority to JP2019552176A priority patent/JP2020515184A/ja
Priority to BR112019019888A priority patent/BR112019019888A2/pt
Publication of WO2018171737A1 publication Critical patent/WO2018171737A1/zh
Priority to US16/579,431 priority patent/US11057163B2/en

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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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—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
    • H04L1/1887—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
    • H04L1/189—Transmission or retransmission of more than one copy of a message

Definitions

  • the present application relates to the field of wireless communications technologies, and in particular, to a data transmission method and related devices.
  • the reliability of data transmission can be ensured by adopting a Hybrid Automatic Repeat ReQuest (HARQ) mechanism. Specifically, after the first device transmits the data to the second device, the second device feeds back the HARQ-ACK for the data of the first data transmission, where the HARQ-ACK includes: an acknowledgement (ACK) and a negative acknowledgement (Negative) ACKnowledgement, NACK). When the first device receives the NACK, it needs to transmit the data to the second device again until the first device receives the ACK. Under the traditional HARQ mechanism, the reliability of data transmission can be ensured, but the delay of data transmission is increased.
  • HARQ Hybrid Automatic Repeat ReQuest
  • the data initially transmitted by the first device is not correctly received by the second device, the data needs to be transmitted to the second device again until the ACK fed back by the second device is received.
  • the first device may need to transmit data to the second device again when receiving the scheduling information of the second device. The process in which the first device receives the scheduling information of the second device and retransmits the data increases the delay of the data transmission.
  • 5G fifth-generation
  • URLLC Ultra-Reliable and Low Latency Communications
  • the first device does not directly transmit the system bits to be transmitted, and the first device implements the transmission system bit by transmitting data including some or all system bits to be transmitted. Specifically, the first device performs channel coding and the like on the system bits to be transmitted to generate data to be transmitted. After the channel coding of the system bit to be transmitted, the first device generates a redundancy bit corresponding to the system bit to be transmitted, and determines according to a redundancy version (RV) used by the first device.
  • RV redundancy version
  • the data to be transmitted which consists of systematic bits and/or redundant bits. It can be known that if the redundancy version used by the first device is different, the generated data to be transmitted is different, that is, the proportions of system bits and/or redundant bits included in the data to be transmitted are different. How to determine the data to be transmitted by the first device in K times of repeated transmission is a subject actively studied by those skilled in the art.
  • the embodiment of the present application provides a data transmission method and related device, which can determine data determined by the system bit each time to be transmitted in K times repeated transmission system bits, thereby ensuring high reliability and low time of data transmission. Ductility.
  • a data transmission method which is applied to a first device, and the method may include:
  • the method before the first device repeatedly transmits the first data to the second device in the first time unit set, the method further includes: when the second condition is met, the first device Determining to repeatedly transmit the first data; the second condition includes: the first device receiving configuration information from the second device, where the first device determines to repeatedly transmit the first data, where the configuration The information corresponds to the transmission resource of the first device; or the first device determines that the transmission code rate for transmitting the system bit is greater than the first threshold, the first device determines to repeatedly transmit the first data.
  • the transmission code rate is determined according to a number of bits of the system bit, a number of occupied resources corresponding to the system bit, and a modulation manner, where the first threshold is The code rate of the channel coding corresponding to the systematic bits.
  • the first condition includes: the first device receives first feedback information of the second device for the first data, the first feedback information And a receiving state of the first data, where the receiving state of the first data includes correct receiving, incorrect receiving, or receiving; or the first device repeatedly transmits the first data to the second device The number of times reaches the second threshold.
  • the first condition includes: the first device receives first feedback information of the second device for the first data, the first feedback information And a receiving state of the first data, where the receiving state of the first data includes an error receiving or receiving; or the number of times the first device repeatedly transmits the first data to the second device reaches a second threshold; after the first device stops transmitting the first data in the Mth time unit, the method further includes: the first device repeating transmission to the second device in the second time unit set The system bit, the second set of time units includes the Mth time unit to the Kth time unit.
  • the first device repeatedly transmits the system bit to the second device in the second time unit set, including: the first device is in the second time Retransmitting the systematic bit to the second device in the unit set until the first device receives second feedback information for the system bit from the second device; or the first device is in the The system bit is repeatedly transmitted to the second device in the second time unit set until the number of times the first device repeatedly transmits the system bit to the second device reaches a third threshold.
  • the first device repeatedly transmits the system bit to the second device in the second time unit set, including: the first device is in the second time
  • the Nth time unit in the set of units transmits second data, the second data being determined according to the second redundancy version and the system bits to be transmitted, and N is a positive integer.
  • the first device repeatedly transmits the system bit to the second device in the second time unit set, including: the first device is in the second time
  • the second data to the Jth time unit in the unit set repeatedly transmits the second data, N ⁇ J, J is an integer.
  • a data transmission method is provided, which is applied to a second device, where the method may include: receiving, by the second device, the first data repeatedly transmitted by the first device in the first time unit set, the first data Is determined according to the first redundancy version and the system bits to be transmitted, the first time unit set includes K time units, K ⁇ 3, K is an integer; when the first condition is met, the second device is The Mth time unit stops receiving the first data, 2 ⁇ M ⁇ K, and M is an integer.
  • the method before the receiving, by the second device, the first data that is repeatedly transmitted by the first device in the first time unit set, the method further includes: the second device to the first The device sends configuration information, where the configuration information is used to instruct the first device to repeatedly transmit the first data.
  • the first condition includes: the second device sending, to the first device, feedback information for the first data, where the feedback information is used to indicate a pair
  • the receiving state of the first data, the receiving state of the first data includes correct receiving, incorrect receiving, or receiving; or the number of times the second device repeatedly receives the first data reaches a second threshold .
  • the method further includes: when the second device confirms receiving the When the first data is described, the feedback information for the first data is sent to the first device, and the feedback information is used to indicate that the first data is received.
  • the second device confirming that the first data is received includes: determining, by the second device, that the first data is received according to the signature information of the first data data.
  • the second device confirms that after receiving the first data, confirming that the first data is correctly received or received incorrectly;
  • a device sends feedback information, the feedback information being used to indicate that the first data is correctly received or received incorrectly.
  • the second device when the feedback information is used to indicate that the first data is received incorrectly or used to indicate that the first data is received, or the second device repeatedly receives The number of times of the first data reaches the second threshold, and the second device receives, in the second set of time units, the systematic bits repeatedly transmitted by the first device, where the second set of time units is included a set of time units from the Mth time unit to the Kth time unit.
  • the second device receives, in a second set of time units, the systematic bits repeatedly transmitted by the first device, where the second set of time units includes the first M time units to the Kth time unit.
  • the second device in the second set of time units, receives the systematic bits repeatedly transmitted by the first device, including: the second device is in a second time Receiving, in the unit set, the systematic bits repeatedly transmitted by the first device, until the second device sends feedback information for the system bit to the first device; or the second device repeatedly receives the The number of systematic bits reaches a third threshold.
  • the second device in the second set of time units, receives the systematic bits that are repeatedly transmitted by the first device, including: the second device is in the The Nth time unit in the set of two time units receives the second data, the second data being determined according to the second redundancy version and the systematic bits, and N is a positive integer.
  • the second device in the second set of time units, receives the systematic bits that are repeatedly transmitted by the first device, including: the second device is in the The Nth time unit to the Jth time unit in the second time unit set receive the second data repeatedly transmitted by the first device, and N ⁇ J, J is an integer.
  • the number of times the first data is repeatedly transmitted is different from the number of times the second data is repeatedly transmitted.
  • the first redundancy version is the same as the second redundancy version, or the first redundancy version and the second redundancy The version is different.
  • the first redundancy version has a version number of zero.
  • the number of times of repeatedly transmitting the second data is determined by the first device without receiving configuration information of the second device
  • the configuration information is used to indicate the number of repeated transmissions of the second data.
  • the third threshold is pre-configured according to received RRC signaling, broadcast signaling, or dynamic signaling; or, the third threshold is The first device is determined according to a delay requirement for the system bits to be transmitted.
  • the signature information includes a demodulation reference signal or preamble information.
  • a third aspect provides a data transmission method, which is applied to a first device, where the method may include: determining, by a first device, a system bit to be transmitted and a first time unit; and the first device according to the first time a unit that determines a redundancy version corresponding to the first time unit; the first device determines first data according to the redundancy version and the system bit to be transmitted; the first device is in the A time unit transmits the first data to the second device.
  • a fourth aspect provides a data transmission method, which is applied to a second device, where the method may include: receiving, by the second device, first data transmitted by the first device in a first time unit; Determining, by the first time unit, a redundancy version corresponding to the first time unit; and the second device processing the first data according to the redundancy version.
  • the determining, according to the first time unit, the redundancy version corresponding to the first time unit including: according to the first time unit An index number that determines a redundancy version corresponding to the first time unit.
  • a first device comprising a functional unit for performing some or all of the methods in the first aspect.
  • a second device comprising a functional unit for performing some or all of the methods of the second aspect.
  • a first device comprising a functional unit for performing some or all of the methods of the third aspect.
  • a second device comprising a functional unit for performing some or all of the methods of the fourth aspect.
  • a first apparatus comprising a memory and a processor, and a computer program stored on the memory for execution by the processor, wherein:
  • the processor executes the steps of the computer program implementing the data transmission method of the first aspect.
  • a second apparatus comprising a memory and a processor, and a computer program stored on the memory for execution by the processor, wherein:
  • the processor executes the steps of the computer program implementing the data transfer method of the second aspect.
  • a first apparatus comprising a memory and a processor, and a computer program stored on the memory for execution by the processor, wherein:
  • the processor executes the steps of the computer program implementing the data transfer method of the third aspect.
  • a second device comprising a memory and a processor, and a computer program stored on the memory for execution by the processor, wherein:
  • the processor executes the steps of the computer program implementing the data transfer method of the fourth aspect.
  • the first device repeatedly transmits the first data to the second device by using the first time unit set, and stops transmitting the first data in the Mth time unit when the first condition is met, Among the K times of repeated transmission system bits, the data determined by the system bits to be transmitted is determined, which ensures high reliability and low latency of data transmission.
  • FIG. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a buffer of Turbo coding disclosed in the embodiment of the present application.
  • 3A to 3C are schematic diagrams showing the composition of time units in a first time unit set disclosed in the embodiment of the present application;
  • FIG. 4 is a schematic flowchart of a data transmission method disclosed in an embodiment of the present application.
  • FIG. 5A is a timing diagram of a first embodiment of repeatedly transmitting first data disclosed in an embodiment of the present application.
  • FIG. 5B is a timing diagram of a second embodiment of repeatedly transmitting first data disclosed in an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another data transmission method disclosed in an embodiment of the present application.
  • FIG. 7 is a timing diagram of a third embodiment of repeatedly transmitting first data disclosed in an embodiment of the present application.
  • FIG. 8, FIG. 9, FIG. 10A to FIG. 10C, FIG. 11A to FIG. 11B are schematic diagrams showing the timings of repeatedly transmitting system bits in the second time unit set by the first device disclosed in the embodiment of the present application;
  • FIG. 12 is a schematic flowchart diagram of still another data transmission method disclosed in the embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a first device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a second device according to an embodiment of the present disclosure.
  • 15 is a schematic structural diagram of another first device disclosed in the embodiment of the present application.
  • 16 is a schematic structural diagram of another second device disclosed in the embodiment of the present application.
  • FIG. 17 is a functional block diagram of a first device disclosed in an embodiment of the present application.
  • FIG. 18 is a functional block diagram of a second device according to an embodiment of the present disclosure.
  • FIG. 19 is a functional block diagram of a first device disclosed in an embodiment of the present application.
  • FIG. 20 is a functional block diagram of a second device disclosed in an embodiment of the present application.
  • FIG. 1 illustrates a wireless communication system 100 in accordance with the present application.
  • the wireless communication system includes a base station 101 and a user equipment 103.
  • the base station 101 may include: a base transceiver station (Base Transceiver Station), a wireless transceiver, a basic service set (BSS), and an extended service set (ESS). , NodeB, eNodeB, HeNodeB, Relay, Femto, Pico, or a base station device applying a 5G technical standard such as gNodeB (gNB) or the like.
  • the wireless communication system 100 can include several different types of base stations 101, such as a macro base station, a micro base station, and the like.
  • the base station 101 can apply different wireless technologies, such as a cell radio access technology, or a WLAN radio access technology.
  • User equipment 103 may be distributed throughout wireless communication system 100, either stationary or mobile.
  • the user equipment 103 may include: a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, a user agent, a mobile client, a Relay, or an application. 5G technology standard user equipment and so on.
  • Radio Access Network RAN
  • the first device may be a base station, and correspondingly, the second device may be a user equipment.
  • the first device may be a user equipment, and correspondingly, the second device may be a base station.
  • the application is not specifically limited.
  • the first device can first determine the system bits to be transmitted.
  • the system bits described in this application may be a Transmission Block (TB) or a Code Block (CB).
  • TB Transmission Block
  • CB Code Block
  • the size of the system bits (ie, the number of system bits) described in this application may be the transport block size. (Transmission Block Size, TBS).
  • the content expression of the systematic bit may be X(z-1)X(z-2)X(z-3)...X(0), where X(i) Representing the system bit, X(i) takes the value 0 or 1, 0 ⁇ i ⁇ z-1 and i is an integer, X(z-1) represents the Most Significant Bit (MSB), X (0) ) indicates the Least Significant Bit (LSB). Determining the system bits to be transmitted includes determining the size (or number) of system bits to be transmitted and/or the contents of the system bits.
  • the first device determines that the size of the system bits to be transmitted can be at least in the following manner:
  • the first device determines the size of the system bits to be transmitted according to the transmission resources of the Grand Free.
  • the transmission resource includes at least one of a time domain resource, a frequency domain resource, and a codebook. It can be understood that in this manner, the size of the system bits to be transmitted can correspond to different transmission resources. For example, if the transmission resource includes N different time-frequency resources, which are represented by time-frequency resource #1, time-frequency resource #2, ..., and time-frequency resource #N, respectively, the system bit size #1 (for example, 100 bits) may be respectively used. , system bit size #2 (eg 500 bits), ..., system bit size #N (eg 1000 bits).
  • the unlicensed transmission resource may be pre-configured by the second device; and/or, the second device is notified by dynamic signaling; or, the first device is driven according to an event; or, is predefined.
  • the pre-configured mode includes the second device being configured by using a Radio Resource Control (RRC) signaling configuration, where the first device is a UE, and the RRC signaling may be UE dedicated signaling (That is, only for a single UE, or user group signaling (that is, valid for UEs included in the user group), or the RRC signaling may also be broadcast signaling; wherein the dynamic signaling includes physical layer signaling, That is, the unlicensed transmission resource may be notified by the control information carried by the physical layer downlink control channel.
  • RRC Radio Resource Control
  • the physical layer downlink control channel may include a physical downlink control channel (PDCCH) or enhanced physical downlink control.
  • the second device may pre-configure a plurality of unlicensed transmission resources, and then use the same. Dynamic signaling informs the first device which specific unlicensed transmission resource to use.
  • the first device drives the selection according to an event, for example, the first device determines an unlicensed transmission resource for transmitting the system bit according to the service transmission requirement. It should be noted that the foregoing descriptions of pre-configuration and dynamic signaling are also applicable to other implementation parts of the present application.
  • the first device determines the size of the system bits to be transmitted according to the scheduling information sent by the second device.
  • the scheduling information may be implemented by physical layer signaling, for example, may be carried in a physical layer downlink control channel, or may be implemented through RRC signaling, and the physical layer signaling and RRC signaling may be referred to ( 1), I will not repeat them here.
  • the scheduling information may directly indicate the system bit size to be transmitted, or indirectly indicate the system bit size to be transmitted.
  • the manner in which the scheduling information indirectly indicates the system bit size to be transmitted is that the scheduling information may indicate a Modulation Coding Scheme (MCS) and an allocated Resource Block (RB) size, which are determined by the first device according to the MCS and the RB.
  • MCS Modulation Coding Scheme
  • RB allocated Resource Block
  • the size of the system bits to be transmitted is determined.
  • the allocated resource blocks can also be characterized by other parameters, mainly indicating time-frequency resources for transmitting the system bits.
  • the first device determines the size of the system bits to be transmitted according to the actual transmission demand.
  • the size of the system bits to be transmitted may be determined by the first device according to other manners, which is not limited herein.
  • the first device determines the content of the system bits to be transmitted, which may be determined according to actual transmission requirements, such as actually transmitted content.
  • the system bits to be transmitted are processed before transmission.
  • a CRC check bit (which may also be called a parity bit (s))
  • channel coding of system bits may be added.
  • the channel coding may include: Turbo code, Tail biting convolutional coding
  • the Polar Code and the low-density parity-check code (LDPC code) may also include other forms of coding, which are not specifically limited herein.
  • FIG. 2 is a manner of performing Turbo coding on system bits to be transmitted according to the present disclosure.
  • the number of bits of system bits to be transmitted is P, and after turbo coding with a code rate of 1/3, channel coded data having a bit number of 3P is generated.
  • the channel coded data includes P systematic bits and 2P redundant bits.
  • the first device determines, according to the resource size of the actual transmission data, how many bits should be selected from the channel coded data with 3P bits for transmission.
  • the specific selection process may be: the channel coded data with the number of bits of 3P is sequentially placed in a buffer according to a certain preset rule.
  • the buffer is only used for convenience.
  • the different channel coded data corresponding to the remaining versions does not mean that there must be a buffer on the first device side.
  • the device may include the buffer or may not include the buffer, which is not specifically limited herein.
  • the buffer in FIG. 2 is assumed to be a ring buffer, and the redundancy version is used to indicate the starting position of data fetching from the ring buffer.
  • the currently supported four redundancy versions are RV0, RV1, RV2, and RV3, respectively.
  • the starting position of the fetched data indicated by each redundancy version can be seen in the indicated position of the arrow in the figure.
  • the starting positions of the starting data fetches indicated by different redundancy versions are different, and the data taken by different redundancy versions is different.
  • the number of bits of channel coded data taken from the ring buffer can be related to the size of the resource actually transmitted.
  • the resource size of the actual transmitted data is related to the time-frequency resource size and the MCS used for actually transmitting the data, or is related to the time-frequency resource size and modulation mode used for actually transmitting the data, or, more generally, , related to the number of bits that can be carried by the resource that actually transmits the data.
  • the actual transmission data indicates data carried on the used time-frequency resource when the first device transmits the channel coded data. For example, assuming that the first device transmits data using X RB blocks, the data carried on the X RB blocks can be regarded as actual transmission data.
  • the time-frequency resources include time resources and frequency resources.
  • Modulation methods include but are not limited to: BPSK, QPSK, 16QAM, 64QAM, 256QAM, 1024QAM.
  • a certain amount of channel coded data is selected from a buffer formed by channel coded data, so that the selected channel coded data can be adapted to a process for transmitting time-frequency resources of the system bits, and See the process of rate matching.
  • the system bits are processed (the processing includes at least one of the following: adding CRC, channel coding, rate matching, channel interleaving, code block segmentation, code block concatenation, scrambling, modulation, layer mapping, precoding
  • the data obtained after the resource element mapping and the output symbol is generated, and the time-frequency resource for transmitting the data is a time-frequency resource for transmitting the system bit in the embodiment of the present invention.
  • the data that is determined by the processing of the system bits to be transmitted by the first device is the data to be transmitted.
  • the processing, by the first device, the system bits to be transmitted at least: the processing to be transmitted by the processing
  • the system bits are converted to data carried on time-frequency resources used to actually transmit data. For example, if the size of the system bits to be transmitted is L bits, the time-frequency resources used for actually transmitting data may carry J bits, and the first device processes the system bits to be transmitted, including processing L bits. J bits, L and J are integers.
  • the CRC is added to the system bits to be transmitted by the first device, and channel coding and rate matching are performed, which may be regarded as a process of processing system bits to be transmitted.
  • the process of processing system bits to be transmitted includes at least one of the following: adding CRC, channel coding, rate matching, channel interleaving, code block segmentation, code block concatenation, scrambling, Modulation, layer mapping, precoding, resource element mapping, and generation of output symbols.
  • the first device determines different data to be transmitted for the same system bit to be transmitted according to different redundancy versions.
  • the content actually transmitted by the first device to the second device is a system bit, and the system bits corresponding to different data are the same.
  • the first device After the first device determines the data to be transmitted corresponding to the system bit to be transmitted, the first device transmits K times of data in the first time unit set, wherein each data transmitted is based on the same system to be transmitted. If the bit is determined, the first device may be considered to repeatedly transmit K times of system bits to be transmitted in the first time unit set.
  • the first time unit set includes K time units, and each time unit transmits data once.
  • K is an integer greater than or equal to 3.
  • the time unit described in the embodiment of the present application may be represented as a Transmission Time Interval (TTI), and the TTI may be used as the minimum time unit of data transmission, or as the minimum time unit of data scheduling, and the length of the TTI is 1 Milliseconds or 0.5 milliseconds; or one TTI can also be represented as an integer number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, for example, each TTI is represented by 1 or 2 OFDM symbols.
  • TTI Transmission Time Interval
  • OFDM Orthogonal Frequency Division Multiplexing
  • the K time units included in the first time unit set may be K consecutive time units or K non-contiguous time units.
  • a continuous time unit means that the time series is continuous in the time domain, and there are no other time units between the two time units.
  • a non-contiguous time unit means that the timing may be discontinuous in the time domain, ie there may be other time units not included in the first set of time units between the two time units. For details, please refer to FIG. 3A to FIG. 3C.
  • timing of the time unit in the first time unit set in the drawing of the present application is from left to right, that is, the leftmost time unit sequence is the first time unit.
  • Figure 3A shows that the first set of time units includes six consecutive time units. On each of the six consecutive time units, each time unit transmits data including system bits one time, that is, six systematic bits are repeatedly transmitted on six consecutive time units. Since the redundancy version of the data may be determined to be different, the data transmitted by the six time units may be the same or different.
  • the first set of time units includes three (corresponding to FIG. 3B) and four (corresponding to FIG. 3C) discontinuous time units.
  • TDD Time Division Duplex
  • the time units in the first time unit set are discontinuous; for example, for multiple HARQ processes.
  • the data transmission also causes the time units in the first time unit set to be discontinuous.
  • the first time unit set transmits the data with the HARQ process number (ID) being 0, and the first in FIG. 3B.
  • the data transmitted in the time unit is the HARQ process number 0, and the data transmitted in the second time unit is the data of other HARQ process numbers (such as 1), and the HARQ process number is 0 corresponding to the system bit and the HARQ process.
  • the system bits corresponding to the number 1 are different.
  • the three discontinuous time units mean that at least one of the three time units is discontinuous with the other time units. It includes the case where each time unit is discontinuous with other time units, as shown in FIG. 3B; and includes two or more time units consecutively, at least one time unit is discontinuous with other time units, as shown in the figure. 3C is shown.
  • the length of time for transmitting data in each time unit in the first time unit set may be the same or different, and is not specifically limited herein.
  • FIG. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application. As shown in FIG. 4, the method includes the following steps.
  • Step S401 the first device repeatedly transmits the first data to the second device in the first time unit set, where the first data is determined according to the first redundancy version and system bits to be transmitted, the first time unit set Includes K time units, K ⁇ 3, and K is an integer.
  • the first device may start to repeatedly transmit the first data to the second device in any one of the first time unit sets.
  • the first device may begin to repeatedly transmit the first data in a first time unit of the first set of time units, wherein the first data is determined according to RV0 and system bits to be transmitted.
  • the repeated transmission data described in this application means that the data transmitted each time is the same, that is, the data corresponding to each transmission has the same redundancy version, and the data bits corresponding to each transmitted data are the same.
  • Repeated transmission of data is actually a specific implementation of repeatedly transmitting system bits.
  • the repeated transmission system bit described in the present application means that the data bits corresponding to each data transmitted in the repeated transmission are the same, and the redundancy versions of the data transmitted each time may be the same or different, that is, the data transmitted each time may be the same. Can be different.
  • the repeated transmission data described in the present application means that the first device transmits the data until the feedback for the repeated transmission data is received; and/or, before the number of times the data is transmitted does not satisfy the maximum number of repeated transmissions, A device transmits the data all the time.
  • the feedback for the repeated transmission data includes acknowledgement response information or denial response information corresponding to the data, or other feedback information, where other feedback information may include control information for scheduling system bits corresponding to the data, or Includes information indicating that the data was received.
  • the repeated transmission system bits described in this application can also be understood as repeated transmission of TB or CB.
  • Repeating the transmission system bit means that the first device transmits the system bit until the second device receives the feedback for the system bit; and/or, before the number of times the system bit is transmitted does not satisfy the maximum number of repeated transmissions, A device always transmits the system bits.
  • the feedback for the system bits includes acknowledgement response information or denial response information corresponding to system bits, or other feedback information.
  • Other feedback information herein may include control information for scheduling the system bits.
  • the first data determined according to the system bit and the first redundancy version may be repeatedly transmitted within a time range in which the system bits are repeatedly transmitted. In this scenario, if the corresponding data is received.
  • the feedback information may not affect the repeated transmission of system bits corresponding to the data, or it may be understood that the system bits corresponding to the data may continue to be repeatedly transmitted within the above time range.
  • the starting point of the first time unit set, or the time position of the first time unit included in the first time unit set may be determined by the first device according to the data transmission requirement, or indicated by the second device, or Yes, it is pre-configured or pre-defined, or may be otherwise defined, and is not specifically limited herein.
  • the first device has a service transmission requirement or a system bit to be transmitted, it can be understood that the first device needs a certain processing time to convert the system bit into data that can be transmitted.
  • the location of the first time unit included in a set of time units in time may be a time unit that is closest to the first device after the first device is ready to transmit the system bits.
  • a device may start transmitting the system bit at the #(m+3)th time unit as early as possible, based on which the #(m+3) time unit may be considered to be the first time unit included in the first time unit set.
  • dynamic signaling may be used, and/or RRC signaling is employed, and/or broadcast signaling is employed.
  • the number of time units (ie, K) included in the first time unit set may be pre-configured, for example, the second device configuration may be repeatedly transmitted K times when the first device transmits the same system bit; or, the first time
  • the number of time units included in the unit set may also be selected by the first device, that is, the first device autonomously determines the number of times the same system bit is repeatedly transmitted.
  • K may also be notified by the first device through dynamic signaling.
  • the first device may be configured by the second device to repeatedly transmit the first data; or the first device repeatedly transmits the first data according to the event.
  • the second device may pre-configure a start time of repeatedly transmitting the first data; or the first device determines a start time of repeatedly transmitting the first data according to the event driving.
  • the second device may send, to the first device, scheduling information, where the scheduling information is used to indicate that the first device performs the transmission of the transmission resource of the first data; or the first device implements the first data by selecting an available unauthorized resource. Repeat the transfer.
  • the first device determines that the first data is repeatedly transmitted in the first time unit set under certain conditions.
  • the condition may include at least one of the following conditions:
  • Configuration information that is sent by the second device to the first device where the configuration information is used to instruct the first device to repeatedly transmit the first data.
  • the configuration information may correspond to a transmission resource of the first device.
  • the first device is used as the user equipment.
  • the base station can configure whether to transmit the first data repeatedly when configuring the uplink unlicensed transmission resource for the user equipment.
  • the base station may further configure a redundancy version corresponding to the first data. If the base station configures at least two sets of uplink unlicensed transmission resources for the user equipment, one unlicensed transmission resource corresponds to one configuration information, or multiple unlicensed transmission resources correspond to one configuration information.
  • the obtained configuration information is the configuration information A; when the unlicensed transmission resource B is used, the obtained configuration information is the configuration information B.
  • the configuration information obtained is configuration information C; and the configuration information obtained by the user equipment when using the unlicensed transmission resource E or the unlicensed transmission resource F For configuration information D.
  • the second device may adopt other configurations for the first device, which is not specifically limited herein.
  • the configuration information may be notified by dynamic signaling, and/or by RRC signaling, and/or by high layer broadcast signaling, or predefined.
  • first data may be understood as a transmission mode when the first device sends the system bits to be transmitted, which may be independent of the time unit set, so the configuration information may be used only for indicating the first
  • the device repeatedly transmits the first data. For example, how the first device determines the first time unit included in the first time unit set and the number of time units included in the first time unit set, refer to the foregoing description, and no further details are provided herein.
  • the first device determines to repeatedly transmit the first data if it is determined that the transmission code rate for transmitting the system bits to be transmitted is greater than the first threshold.
  • the transmission code rate used by the first device to transmit the system bits to be transmitted is determined according to the number of bits of the system bits to be transmitted, the number of transmission resources corresponding to the system bits to be transmitted, and the modulation mode. In other words, the transmission code rate is determined according to the number of bits of system bits to be transmitted and the number of bits that the transmission resources corresponding to the system bits to be transmitted can carry.
  • the transmission resource corresponding to the system bit to be transmitted includes one resource element (Resource Element, RE), and assumes that the modulation mode of transmitting the system bit to be transmitted corresponds to
  • the modulation order is J
  • the number of bits that the transmission resource corresponding to the system bit to be transmitted can bear is I ⁇ J
  • the transmission rate of the system bit used by the first device to transmit the system bit is H/( I ⁇ J).
  • the correspondence between modulation mode and modulation order can be seen in Table 1.
  • the foregoing takes the RE as an example, and represents a minimum time-frequency resource unit carrying one modulation symbol, but the minimum time-frequency resource unit carrying one modulation symbol is not limited thereto.
  • the first threshold may be a code rate of a channel coding corresponding to a system bit to be transmitted.
  • the first threshold can be determined to be 1/3.
  • the number of bits of the system bits to be transmitted is 1000 (1 k)
  • the number of REs corresponding to the transmission resources of the system bits is 1000 (1 k)
  • the modulation method used to process the system bits is 16QAM
  • Table 1 it is determined that the modulation order corresponding to 16QAM is 4, and according to the above data, it can be determined that the transmission bit rate of the system bits to be transmitted is 1/4. That is, the transmission resource corresponding to the system bit to be transmitted can carry 4k bits of data.
  • 2 includes 1k system bits to be transmitted and 2k redundant bits.
  • the first device determines that the number of bits of the transmitted data is 4k, 4k bits of data are extracted from the ring buffer, and the 4k bits of data can include all system bits to be transmitted, and the first device does not need to determine the repeated transmission.
  • a redundant version of the data that is, when the transmission code rate corresponding to the system bits to be transmitted is less than or equal to the first threshold, the number of bits of the system bits to be transmitted corresponding to each redundancy version is consistent, and includes all system bits to be transmitted. Therefore, it is not necessary to repeatedly transmit the first data corresponding to the first redundancy version.
  • the transmission code rate corresponding to the system bit to be transmitted is greater than the first threshold, for example, in turbo coding, all bits cannot be taken out from the ring buffer, and the starting position corresponding to the redundancy version can be determined according to each redundancy version. Take the number of bits of the systematic bits included in the data. In the present application, it may be determined that the first redundancy version is a redundancy version corresponding to data capable of including the maximum number of bits of system bits.
  • the user equipment determines to use for transmission.
  • the transmission code rate of the system bits to be transmitted may be determined according to the number of bits of the pre-configured system bits, the number of resources of the uplink unlicensed transmission resource (such as the number of REs), and the modulation mode.
  • the transmission code rate may also be pre-configured by the base station.
  • the transmission code rate may also be predefined by the user equipment. This is not specifically limited.
  • the first threshold may also be directly configured by the second device, where the second device may configure the first threshold by and/or higher layer signaling (eg, RRC signaling, broadcast signaling).
  • higher layer signaling eg, RRC signaling, broadcast signaling.
  • the first device may determine that in the process of repeatedly transmitting system bits, different redundancy versions and different transmission data determined by the system bits, the number of system bits included is substantially the same, then the first The device may determine that the first data does not need to be repeatedly transmitted, otherwise the first device may determine to repeatedly transmit the first data.
  • the second device When the first device repeatedly transmits the first data, and the first data corresponds to the first redundancy version, whether the second device misses the first data can be reduced regardless of whether the second device can correctly receive the first data. Probability, the second device receives the first data including more systematic bits, and further helps the second device to correctly receive the system bits to be transmitted, thereby further reducing the data transmission delay.
  • Step S402 the second device receives the first data.
  • the second device confirms that the first data is received by the signature information of the first data.
  • the signature information of the first data may include a Demodulation Reference Signal (DMRS), a Preamble, and the like corresponding to the first data.
  • DMRS Demodulation Reference Signal
  • the time and/or frequency resources occupied by the DMRS may be different, or the DMRS sequence form may be different.
  • other data is determined by other redundancy versions and the system bits to be transmitted, that is, the first data and other data are different in that the corresponding redundancy versions are different, and the corresponding system bits to be transmitted are the same.
  • the time and/or frequency resources occupied by the DMRS corresponding to the first data and other data are different, or the sequence form of the DMRS corresponding to the first data and other data may be different to distinguish the first data from other data. It can be understood that when the time and/or frequency resources occupied by the DMRS corresponding to the first data and other data are different, and the DMRS is related to the time-frequency resource location used by the transmission data, then the first data is transmitted and the other transmission is transmitted. The time-frequency resources used by the data are different.
  • the second device may further parse the first data and generate a receiving result.
  • the reception result includes correct reception or incorrect reception.
  • Step S403 The second device sends feedback information to the first device, where the feedback information is used to indicate a receiving state of the first data by the second device.
  • the second device may send feedback information, where the feedback information is used to indicate that the first data is received; or, after parsing the first data, Sending feedback information for indicating that the first data is correctly received (ACK) or received incorrectly (NACK).
  • ACK correctly received
  • NACK received incorrectly
  • the second device can further reduce the data transmission delay by determining that the first data is received, that is, sending the feedback information, and enables the first device to prepare other data transmissions as soon as possible. For example, if the redundancy version corresponding to the first data is RV0, the second device receives the first data, that is, sends feedback information, so that the first device can determine other data according to other redundancy versions, and can transmit the second data by using other data.
  • the device receives the system bits to provide more redundant coding gain, thereby improving data transmission reliability.
  • the second device sends feedback information to the first device, where the feedback information is used to indicate the receiving status of the second device.
  • Receive status includes received, received correctly, or received incorrectly.
  • the specific form of the feedback information may be correctly received by an Acknowledgement (ACK), a Negative ACKnowledgement (NACK) indicates an erroneous reception, or may be indicated by a new data indicator (NDI).
  • ACK Acknowledgement
  • NACK Negative ACKnowledgement
  • NDI new data indicator
  • the ACK or the NACK may be represented by the value of the NDI, or the ACK or the NACK may be indicated by whether the value of the NDI is inverted.
  • the feedback information may also be in other representations, which is not specifically limited herein.
  • the second device may transmit the feedback information through a Physical Hybrid-ARQ Indicator Channel (PHICH), or through a Physical Downlink Control Channel (PDCCH) or an enhanced physics.
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • PDCCH Physical Downlink Control Channel
  • EPCCH Enhanced Physical downlink Control channel
  • the feedback information does not include scheduling information of the second device on the system bit, for example, the feedback information includes only an acknowledgement response or a negative acknowledgement or a response to receive the system bit.
  • Step S404 the first device receives the feedback information, and stops repeatedly transmitting the first data in the Mth time unit.
  • the first device after the first time device receives the feedback information, the first device needs to process the feedback information, and then stops transmitting the first data in the next time unit.
  • M refers to the number of the time unit in the first time unit set, and the first time unit set in the first time unit set is 1.
  • the first device may start to repeatedly transmit the first data in the first time unit in the first time unit set, or may start to repeatedly transmit the first data in the specified time unit in the first time unit set.
  • the time interval between the specified time unit and the first time unit may be pre-configured or determined by other means, which is not specifically limited herein.
  • the first device repeatedly transmits the first data in the first time unit set, where the first data is determined by the first redundancy version and the system bits to be transmitted, and the probability that the second device receives the first data can be improved. And the first device may stop repeating the transmission of the first data when the first condition is satisfied.
  • the above method can ensure high reliability of data transmission and low latency.
  • FIG. 5A is a timing diagram of a first embodiment of repeatedly transmitting first data disclosed in an embodiment of the present application.
  • the first time unit set includes 8 time units, that is, K is 8.
  • the first device starts to repeatedly transmit the first data in the first time unit, and after the first data of the first time unit is received by the second device, the second device can send the feedback information. If the feedback information is used to indicate that the first data is received, the first device may receive the feedback information in the second time unit, as shown in FIG. 5A, the first device stops transmitting the first data in the third time unit, At this time, M is 3.
  • the first device For the third time unit, if the first device has prepared other data before the third time unit, the data is determined according to other redundancy versions and system bits to be transmitted, for example, multiple devices are stored in the first device.
  • the data buffer the first device can transmit other data in the third time unit.
  • the first device may start transmitting other data in the fourth time unit, and not transmitting the system bit in the third time unit. , but does not rule out the transmission of other system bits.
  • the data transmission mode of the first device in the third time unit to the eighth time unit is not specifically limited.
  • the first device can receive the feedback information of the second device for the first data transmission in the first time unit as soon as possible. In this case, the second device may stop repeating the transmission of the first data in the second time unit, at which time M is 2.
  • FIG. 5B is a timing diagram of a second embodiment of repeatedly transmitting first data disclosed in the embodiment of the present application.
  • the first time unit set includes a continuous time unit as an example.
  • the first time unit set includes 8 time units, that is, K is 8.
  • the first device starts to repeatedly transmit the first data in the first time unit, and after the first data of the first time unit is received by the second device, the second device can send the feedback information.
  • the feedback information is used to indicate that the first data was received correctly or received incorrectly. Since the second device needs to process the first data, compared to FIG. 5A, the time unit in which the first device receives the feedback information in FIG. 5B is later than the time unit in which the first device receives the feedback information in FIG. 5A. As shown in FIG. 5B, the first device receives feedback information at the fifth time unit, where M is 6.
  • the first device stops transmitting the system bits to be transmitted in the 6th to 8th time units. That is, the first device does not transmit data corresponding to the system bits to be transmitted in the sixth to eighth time units.
  • the first device can transmit other system bits to be transmitted in the 6th to 8th time units, or transmit data corresponding to other system bits to be transmitted.
  • the first device may continue to repeatedly transmit the system bits to be transmitted corresponding to the first data in the sixth to eighth time units, where the first device is in the sixth to The data transmission method of the eighth time unit is not specifically limited.
  • the first device transmits, in the sixth to eighth time units, the redundancy version corresponding to the system bit to be transmitted is different from the first redundancy version; or the first device is in the sixth to eighth
  • the redundancy version corresponding to the system bit to be transmitted transmitted in the time unit may be the same as the first redundancy version, that is, the first device may still transmit the first time in at least one time unit in the sixth to eighth time units.
  • the determination of the number of times the first data is repeatedly transmitted within the time range is different from the method of determining the number of times the first device repeatedly transmits the first data in the first to fifth time units.
  • the number of times of repeatedly transmitting the first data is related to the feedback information, that is, when the first device receives the feedback information, when can the repeated transmission be terminated.
  • One data. After receiving the feedback information, whether the first device repeatedly transmits the first data in the remaining time unit of the first time unit set, or non-repetitively transmitting the first data, may be the first device autonomously selected, or the first device Determined according to configuration information sent by the second device.
  • the configuration information may be physical layer signaling, or may be high-level signaling, such as RRC broadcast signaling, RRC dedicated signaling, or medium access control (MAC) signaling, which is not specifically limited herein. .
  • the first device has the capability of rapidly demodulating data
  • the first device receives the feedback information sent by the second device in the M-1th time unit, and the first device can be at the Mth.
  • the first data is stopped and transmitted after the time period included in the time unit, which is equivalent to the first device transmitting only a part of the first data in the M-1th time unit.
  • the M-1th time unit includes 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols
  • the feedback information sent by the second device is a physical layer that occupies 2 OFDM symbols in time. If the downlink control channel is sent, the first device can receive the feedback information on the first two OFDM symbols in the M-1th time unit, so the first device can be in the latter part of the M-1th time unit.
  • the transmission of the first data is stopped repeatedly.
  • FIG. 6 is a schematic flowchart of still another data transmission provided by an embodiment of the present application. As shown in Figure 6, the method includes the following steps.
  • Step S601 the first device repeatedly transmits the first data to the second device in the first time unit set, where the first data is determined according to the first redundancy version and system bits to be transmitted, the first time unit set Includes K time units, K ⁇ 3, and K is an integer.
  • Step S602 When the number of times that the first device repeatedly transmits the first data reaches the second threshold, the first data is stopped and transmitted in the Mth time unit.
  • the value of M is 3 ⁇ M ⁇ K, that is, in this embodiment, the first device repeatedly transmits the first data at least twice in the first set of time units.
  • the first device repeatedly transmits the first data to the second device in the first time unit set, and does not receive the second data when the number of times the first device repeatedly transmits the first data reaches the second threshold.
  • the second threshold may be pre-configured, and/or may be pre-defined by dynamic signaling, or may be independently selected by the first device, and is not specifically limited herein.
  • the first device is used as the user equipment.
  • the base station can simultaneously configure the first data when configuring the uplink unlicensed transmission resource for the user equipment.
  • the number of repeated transmissions that is, configuration M-1.
  • the UE may further determine the number of repeated transmissions of the first data according to the historical uplink data transmission situation.
  • the UE repeatedly transmits and transmits the first data M-1 times in the first time unit set, and receives the feedback information sent by the base station in the first time window after stopping the repeated transmission of the first data, where the first time
  • the window includes at least one time unit, and further optionally, the first time unit included in the first time window is a first time unit in which the UE stops repeatedly transmitting the first data (for example, the first time unit set in FIG. 7 Including the sixth time unit), the UE may reduce or increase the number of times of repeatedly transmitting the first data in the next first time unit set.
  • the UE may reduce the repeated transmission in the next first time unit set.
  • the number of times of the data conversely, if the UE receives the negative acknowledgement information fed back by the base station in the first time window, the information is used to indicate that the base station does not correctly receive the system bits to be transmitted, the UE may be in the next first time unit set.
  • the number of times the first data is repeatedly transmitted is increased.
  • the UE may further determine the number of times the first data is repeatedly transmitted according to a transmission code rate corresponding to the system bit to be transmitted.
  • the transmission code rate is the same as above, and will not be described here.
  • the UE may also determine the number of repeated transmissions of the redundancy version 0 and the data corresponding to the system bits to be transmitted according to the number of system bits included in each redundancy version, in particular, the redundancy version 0.
  • the second threshold may be M-1. Assuming that the processing time is 4 time units, in one case, the first time unit will receive feedback information in the 5th time unit, and the second threshold may be set to 5, of course, the second threshold may also be 6 Or, the second threshold is a multiple of 5 or 6, for example, the second threshold is set to 10, and the first device repeatedly transmits the first data 10 times.
  • FIG. 7 is a timing diagram of a third embodiment of repeatedly transmitting first data disclosed in an embodiment of the present application.
  • the first device repeatedly transmits the first data from the first time unit.
  • the processing here includes receiving the first data.
  • the data is to be restored to the system bit to be transmitted corresponding to the first data.
  • the system bits to be transmitted corresponding to the first data are recovered, including the recovery correctness and the recovery error.
  • the first set of time units in Figure 7 includes 8 time units, i.e., K is 8. In the 5th time unit, the repeated transmission of the first data is stopped, and M is 5 at this time.
  • the data transmission manner of the first device in the sixth time unit to the eighth time unit is not specifically limited herein.
  • the first device may repeatedly transmit the to-be-transmitted in the second time unit set.
  • the first device repeatedly transmits the system bits to be transmitted in the second time unit set, until the first device receives the second feedback information sent by the second device, where the second feedback information is the second
  • the feedback information sent by the device for the system bit is used to indicate the receiving status of the system bit by the second device, where the receiving state includes: the second device correctly receives the system bit, or the second device does not correctly receive the system Bit.
  • the first device repeatedly transmits the system bits to be transmitted in the second time unit set until the number of times the first device repeatedly transmits the system bits to the second device reaches a third threshold.
  • the number of times the first device repeatedly transmits the system bit to the second device includes the number of times the first data is repeatedly transmitted and the number of repetitions of the first device repeatedly transmitting the system bits to be transmitted in the second time unit set.
  • the third threshold may be equal to K (ie, equal to the number of time units included in the first time unit set), that is, after the first device repeatedly transmits the system bits to be transmitted K times in the first time unit, the first device may stop.
  • the number of times the first device repeatedly transmits the system bit to the second device includes only the number of repetitions of the systematic bits corresponding to the system bit to be transmitted by the first device in the second time unit set.
  • the third threshold may be equal to K-M+1, that is, when the first device repeats the transmission in the second time unit set.
  • the system device repeatedly transmits the system bits to be transmitted in the second time unit set in the following with reference to the accompanying drawings.
  • FIG. 8 is a timing diagram of a first embodiment of a first device repeatedly transmitting system bits in a second time unit set according to an embodiment of the present disclosure.
  • the first device repeatedly transmits the first data from the first time unit, stops repeating the transmission of the first data in the Mth time unit, and the first device stops repeatedly transmitting the first data in the Mth time unit.
  • the condition is that the first device receives the feedback information sent by the second device for the first device, or the number of times the first device repeatedly transmits the first data reaches a second threshold.
  • the first device repeatedly transmits the systematic bits corresponding to the first data in the second set of time units.
  • the second set of time units includes the Mth time unit to the Kth time unit.
  • the first device may repeatedly transmit system bits to be transmitted through other data within the second set of time units.
  • the other data refers to data transmitted by the first device in any one of the second time unit sets.
  • the other data is the same as the system bit to be transmitted corresponding to the first data, and the corresponding redundancy versions may be the same or different.
  • the data transmission form of the first device in the second time unit set will be described below with reference to FIG. 10A to FIG. 10C.
  • the redundancy version corresponding to the data transmitted by the first device in each of the time units in a time-series relationship (in a temporally forward-to-back order) within the second set of time units may be pre-configured, and/or, dynamic signaling , or predefined, or the first device is selected from a preset sample library, and may be otherwise limited, and is not specifically limited herein.
  • the redundancy version corresponding to the data transmitted on each time unit may be: RV2, RV3, RV1, and then sequentially looped as shown in FIG.
  • the redundancy version may be: RV2, RV3, RV1, RV0, and then sequentially looped, as shown in FIG. 10B; or, the redundancy version corresponding to the data transmitted on each time unit may be RV0, RV2, RV3. RV1, and then loops in turn; or, the redundancy version corresponding to the data transmitted on each time unit can be RV2, RV0, and then looped in sequence.
  • the first device in the second time unit set may further repeatedly transmit data corresponding to one redundancy version, as shown in FIG. 10C, the redundancy version corresponding to the data transmitted on each time unit is sequentially For RV2, RV3, and RV1, each redundancy version is transmitted twice.
  • the number of repeated transmissions of RV2/RV3/RV1 may be different.
  • the second time unit set may also repeatedly transmit the second data, and assume that the redundancy version corresponding to the second data is RV2. Then, the first device may repeatedly transmit the second data in the second time unit set. It should be noted that, optionally, the first device is in the second time unit set, if the data corresponding to the system bit to be transmitted is repeatedly transmitted, the number of repetitions is different from the number of times the first data is repeatedly transmitted.
  • the first device in the second time unit set, the redundancy version corresponding to the system bit to be transmitted, and/or the number of repeated transmissions of the data corresponding to the redundancy version may be pre-configured, and / or, through dynamic signaling, or pre-defined, or the first device to choose, which is not specifically limited.
  • RV0, RV1, RV2, and RV3 described in the embodiments of the present application refer to the version number of the redundancy version, and RV0, RV1, RV2, and RV3 are the version numbers 0, 1, 2, and 3, respectively.
  • the first device may further receive feedback information of the second device on the time unit of the second time unit set, which is different from the feedback information received by the first device when repeatedly transmitting the first data.
  • the feedback information received by the first device when the first data is repeatedly transmitted is used as the first feedback information
  • the feedback information of the second device is received as the second feedback information on the time unit of the second time unit set.
  • FIG. 9 is a timing diagram of a second embodiment of a first device repeatedly transmitting system bits in a second set of time units according to an embodiment of the present disclosure.
  • the first time unit set includes 10 time units, and the first device repeatedly transmits the first data from the first time unit included in the first time unit set. If the first device receives the first feedback information in the fourth time unit included in the first time unit set, and the first feedback information indicates that the first data is not correctly received or indicates that the first data is received, Then, the first device may stop repeating the transmission of the first data from the 5th time unit included in the first time unit set, and repeatedly transmit the system bits corresponding to the first data from the 5th time unit.
  • the first device may The ninth time unit and the tenth time unit included in the first time unit set stop transmitting the systematic bits repeatedly.
  • the first device may still transmit the system bit in the ninth time unit and the tenth time unit included in the first time unit set.
  • the first device may determine, according to the scheduling information of the second device, whether the information bit needs to be transmitted in the ninth time unit and the tenth time unit.
  • the second device may further send scheduling information, where the scheduling information is used to indicate that the first device is in the ninth time unit and/or the tenth time
  • the unit transmits the information bits.
  • the scheduling information may also indicate that the first device transmits the information bit in other time units than the first time unit set.
  • the scheduling information may be sent by using physical layer signaling. If the second device is a base station, the second device may send the scheduling information by using the UL Grant control information.
  • the second feedback information is similar to the first feedback information, and may be transmitted through a PHICH channel, or may be transmitted through a PDCCH or an EPDCCH, or other downlink channel, and the second feedback information may pass through a UE-specific downlink control channel.
  • the transmission (for example, the UE specific (E) PDCCH) may be transmitted through a group of UE-specific downlink control channels (for example, UE group-(E)PDCCH), or may be sent through a downlink control channel common to the cell, and is not specifically limited herein.
  • the specific form of the second feedback information is similar to the specific form of the first feedback information, and may be other forms, which are not specifically limited herein.
  • repeated transmission of system bits to be transmitted or system bits of repeated transmission described in the above embodiments may also be understood as repeated transmission of TB or CB.
  • the K time units included in the first time unit set are time units that can be used to transmit system bits to be transmitted, and may not include untransmission due to processing delay.
  • the time unit of the system bits to be transmitted It is assumed that the first condition is that the first device receives the first feedback information that is sent by the second device for the first data, that is, after receiving the first feedback information, the second device stops repeatedly transmitting the system bits to be transmitted, and the first The device repeatedly transmits the systematic bits within the second set of time units until the number of times the system bits are repeatedly transmitted reaches K.
  • 11A illustrates a manner in which it is assumed that the first time unit set includes 10 time units, the first device repeatedly transmits the first data from the first time unit, and receives the first feedback information in the fourth time unit. , the first device can stop repeating the transmission of the first data in the fifth time unit. Considering the processing delay, it is assumed that the first device can start transmitting the second data at the 6th time unit as soon as possible (here, the second data includes data determined according to the second redundancy version and the system bits to be transmitted, the second redundancy The remaining version may be the same as or different from the first redundancy version.
  • the second redundancy version may be different from the first redundancy version, it may be understood that the first device is at the 5th The time unit, without transmitting the system bits to be transmitted, the fifth time unit may not be included in the first time unit set.
  • the 10 time units included in the first time unit set may correspond to the 1st time unit to the 4th time unit in FIG. 11A, respectively, and the 6th time unit to the 11th time unit.
  • FIG. 11B illustrates another manner in which it is assumed that after receiving the first feedback information, the first device has the ability to start transmitting the second data at the latest time unit after receiving the first feedback information, at this time, the first The ten time units included in the time unit set correspond to the first time unit to the tenth time unit in FIG. 11A.
  • system bits to be transmitted may include parity bits or may not include parity bits.
  • FIG. 12 is a schematic flowchart of still another data transmission provided by an embodiment of the present application. As shown in FIG. 12, the method includes the following steps.
  • Step S1201 The first device determines a system bit to be transmitted and a first time unit, where the first time unit is configured to transmit the system bit.
  • Step S1202 The first device determines, according to the first time unit, a redundancy version corresponding to the first time unit;
  • Step S1203 The first device determines, according to the redundancy version and the system bit to be transmitted, first data.
  • Step S1204 The first device transmits the first data to the second device in the first time unit.
  • Step S1205 The second device receives the first data transmitted by the first device in the first time unit.
  • Step S1206 The second device determines, according to the first time unit, a redundancy version corresponding to the first time unit.
  • Step S1207 Processing the first data according to the redundancy version.
  • the second device processes the first data according to the redundancy version, and the second device determines, according to the redundancy version and the first data, system bit information corresponding to the first data.
  • the second device may determine channel coding data corresponding to the first data according to the redundancy version and the first data, where the channel coding data is the same as that illustrated in FIG. 2, and then recover corresponding system bit information according to the channel coding data.
  • the second device may process the channel coded data through channel decoding.
  • the implementation is applicable to the following scenario: the channel code data corresponding to the first data includes all systems to be transmitted.
  • the decoding result may be that the system bit information corresponding to the channel coded data is correctly recovered (ie, the decoding is successful), or the system bit information corresponding to the channel coded data may be recovered by mistake (ie, the decoding fails);
  • the second device may process the channel coded data by combining detection and/or channel coding, for example, the second device receives multiple data corresponding to the same system bit to be transmitted, then the second device After processing the data into channel-encoded data, the channel-encoded data corresponding to the data may be combined according to a certain rule, for example, by Chase Combine (CC) or Incremental Redundancy (IR). Then channel decoding is performed.
  • CC Chase Combine
  • IR Incremental Redundancy
  • the second device processes the first data, which may be an inverse operation of a process of processing system bits to be transmitted as data transmission.
  • the process of processing the system bits to be transmitted into the transmitted data is as described above, and is not described herein.
  • the first device and the second device may determine, according to an index number of the first time unit, a redundancy version corresponding to the first time unit.
  • the specific implementation manner in which the first device and the second device determine the correspondence between the time unit and the redundancy version may include at least the following methods:
  • RV Index (CURRENT_TTI + Offset) mod numberOfConfRV-Num.
  • the CURRENT_TTI is an index number of a time unit corresponding to the RV version number. Assuming that a time unit is a subframe, a representation of the subframe index number can be represented by a subframe index within a radio frame, assuming that one radio frame includes N subframes, and the N subframes correspond to The subframe index numbers are subframe 0, subframe 1, ..., subframe N-1, and the corresponding value of CURRENT_TTI is any value from 0 to N-1; or, the subframe index number may also be It is expressed by the absolute value in the system.
  • one wireless superframe includes M radio frames, and each radio frame includes N subframes
  • the corresponding value of CURRENT_TTI can be used (SFN*N)+i
  • SFN represents a system frame number
  • SFN is an integer greater than or equal to 0 and less than or equal to M-1
  • M is the largest system frame number, that is, different SFNs correspond to different radio frames
  • i is An integer greater than or equal to 0 and less than or equal to N-1; or alternatively, the subframe index number may also be represented by a slot number.
  • the subframe index number may be floor(Ns/ 2), where floor(X) means rounding down X, Ns/2 table Ns divided by two.
  • CURRENT_TTI can also have other representations, for example, in the 5G communication system, and can also be expressed in other ways, and is not specifically limited.
  • X mod Y represents a remnant operation; where numberOfConfRV-Num represents the number of different RV versions that can be used in transmitting or repeatedly transmitting system bits to be transmitted.
  • the parameter may be implemented by pre-configuration, and/or indicated by dynamic signaling, or the parameter is selected by the first device, and is not specifically limited herein.
  • the Offset parameter configuration is the same as numberOfConfRV-Num, or Offset can be 0, that is, the RV index can be directly determined by CURRENT_TTI mod numberOfConfRV-Num.
  • the result of CURRENT_TTI mod numberOfConfRV-Num may have a fixed correspondence with the version number of a different RV version, for example, the result of CURRENT_TTI mod numberOfConfRV-Num is 0, or is 1, or 2, If the value is 3, the corresponding RV version number may be 0, or 2, or 3, or 1.
  • the corresponding relationship may also have other representations, which are not described herein. The corresponding relationship may be pre-configured, and/or dynamically signaled, or may be predefined, and is not specifically limited.
  • the second device taking the base station as an example
  • the starting offset of the RV0 transmission is the jth time unit
  • the period is S time units
  • the UE is respectively at the j+(i-1) * RV0 is transmitted on S time units, where i is an integer not less than 0.
  • the base station may further configure the number of repeated transmissions corresponding to RV0, for example, L times, where L is an integer not less than 2 and less than M, and the UE is respectively at j+(i-1)*S+q times RV0 is transmitted on the unit, where q is an integer not less than 0 and less than L.
  • redundancy versions similar configurations exist, and are not described here.
  • RV0 if no retransmission is used, between the j+(i-1)*S time units and the j+i*S time units, other redundancy versions such as RV1/ RV2/RV3 can be transmitted according to the pre-configured pattern; if RV0 uses repeated transmission, between j+(i-1)*S+(L-1) time units and j+i*S time units, Other redundancy versions such as RV1/RV2/RV3 can also be transmitted in a pre-configured pattern.
  • the period and the starting offset of the RV version may be configured for a specific RV version.
  • the period may be configured as RV0-Period
  • the index number of the time unit corresponding to RV0 may have other expressions, which are not specifically limited. Further optionally, for the specific RV version (for example, RV0 in the above example), the number of repeated transmissions may also be configured. In this case, it can be understood that the time unit determined by the above formula is the first corresponding RV0. Time unit.
  • the cycle and the starting offset and the number of repetitions are configured for a specific RV version, for other redundancy versions, one possible implementation may be separately configured similar to RV0, and the other A possible implementation is to have a specific relationship with the configuration of RV0.
  • RV0 On a time unit other than RV0, other RV versions correspond to different time units according to a fixed pattern.
  • the above two possible implementations may also be used in combination, for example, some parameters are separately configured. There is a specific relationship between some parameters and the configuration of RV0.
  • the second device performs channel decoding and the like on the first data according to the determined redundancy version.
  • the first device determines the redundancy version corresponding to the first time unit, and can ensure the accuracy of the second device to determine the redundancy version corresponding to the data on the first time unit, and the second device can perform the accurate HARQ. Consolidate to reduce data transmission delay.
  • FIG. 13 is a schematic structural diagram of a first device according to an embodiment of the present application.
  • the first device 1300 includes: a processor 1301, a memory 1302, and a communication interface 1303.
  • the processor 1301 controls wireless communication with an external network through the communication interface 1303.
  • the communication interface 1303 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, LNA (Low Noise Amplifier), duplexer, etc.
  • the memory 1302 includes at least one of: a random access memory, a nonvolatile memory, and an external memory.
  • the memory 1302 stores executable program code capable of guiding the processor 1301 to perform the method embodiment of the present invention. The method specifically disclosed includes the following steps:
  • the transmission of the first data is stopped at the Mth time unit, 2 ⁇ M ⁇ K, and M is an integer.
  • executable program code can guide the processor 1301 to perform the method performed by the first device described in the foregoing method embodiments, such as the method shown in FIG. 6, and details are not described herein again.
  • FIG. 14 is a schematic structural diagram of a second device according to an embodiment of the present application.
  • the second device 1400 includes: a processor 1401, a memory 1402, and a communication interface 1403; the processor 1401 controls wireless communication with an external network through the communication interface 1403; the communication interface 1403 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, LNA (Low Noise Amplifier), duplexer, etc.
  • the memory 1402 includes at least one of: a random access memory, a nonvolatile memory, and an external memory, and the memory 1402 stores executable program code capable of guiding the processor 1401 to perform the method embodiment of the present invention.
  • the method specifically disclosed includes the following steps:
  • the second device stops receiving the first data in the Mth time unit, 2 ⁇ M ⁇ K, and M is an integer.
  • executable program code can guide the processor 1401 to perform the method performed by the second device described in the foregoing method embodiment, for example, the method shown in FIG. 4, and details are not described herein again.
  • FIG. 15 is a schematic structural diagram of a first device according to an embodiment of the present application.
  • the first device 1500 includes a processor 1501, a memory 1502, and a communication interface 1503.
  • the processor 1501 controls wireless communication with an external network through the communication interface 1503.
  • the communication interface 1503 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, LNA (Low Noise Amplifier), duplexer, etc.
  • the memory 1502 includes at least one of: a random access memory, a nonvolatile memory, and an external memory.
  • the memory 1502 stores executable program code capable of guiding the processor 1501 to perform the method embodiment of the present invention. The method specifically disclosed includes the following steps:
  • FIG. 16 is a schematic structural diagram of a second device according to an embodiment of the present application.
  • the second device 1600 includes a processor 1601, a memory 1602, and a communication interface 1603.
  • the processor 1601 controls wireless communication with an external network through the communication interface 1603.
  • the communication interface 1603 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, LNA (Low Noise Amplifier), duplexer, etc.
  • the memory 1602 includes at least one of: a random access memory, a nonvolatile memory, and an external memory, and the memory 1602 stores executable program code capable of guiding the processor 1601 to perform the method embodiment of the present invention.
  • the method specifically disclosed includes the following steps:
  • the first data is processed according to the redundancy version.
  • a functional block diagram of the device provided by the embodiment of the present application is described below.
  • the functional blocks of the first device may implement the inventive arrangements by hardware, software, or a combination of hardware and software.
  • the functional blocks described herein can be combined or separated into several sub-blocks to implement the embodiments of the present invention. Accordingly, the above description in this application may support any possible combination or separation or further definition of the functional modules described below.
  • Figure 17 shows a functional block diagram of a first device.
  • the first device 1700 includes: a transmission unit 1701;
  • the transmitting unit 1701 is configured to repeatedly transmit the first data to the second device in the first time unit set, where the first data is determined according to the first redundancy version and system bits to be transmitted, where the first time is
  • the unit set includes K time units, K ⁇ 3, and K is an integer;
  • the transmission unit 1701 is further configured to stop transmitting the first data in the Mth time unit when the first condition is met, 2 ⁇ M ⁇ K, where M is an integer.
  • the above functional unit is also capable of executing some or all of the corresponding methods described in the foregoing method embodiments.
  • the hardware structure on which the above functional units are based can be seen in the embodiment shown in FIG. I will not repeat them here.
  • FIG. 18 shows a functional block diagram of a second device.
  • the second device 1800 includes: a receiving unit 1801;
  • the receiving unit 1801 is configured to receive, in the first time unit set, first data that is repeatedly transmitted by the first device, where the first data is determined according to the first redundancy version and system bits to be transmitted, where the A set of time units includes K time units, K ⁇ 3, and K is an integer;
  • the receiving unit 1801 is further configured to stop receiving the first data in the Mth time unit when the first condition is met, 2 ⁇ M ⁇ K, where M is an integer.
  • the above functional unit is also capable of executing some or all of the corresponding methods described in the foregoing method embodiments.
  • the hardware structure on which the above functional units are based can be seen in the embodiment shown in FIG. I will not repeat them here.
  • Figure 19 shows a functional block diagram of a first device.
  • the first device 1900 includes a first determining unit 1901, a second determining unit 1902, a third determining unit 1903, and a transmitting unit 1904.
  • the first determining unit 1901 is configured to determine a system bit to be transmitted and a first time unit
  • a second determining unit 1902 configured to determine, according to the first time unit, a redundancy version corresponding to the first time unit;
  • a third determining unit 1903 configured to determine first data according to the redundancy version and the system bit to be transmitted;
  • the transmitting unit 1904 is configured to transmit the first data to the second device in the first time unit.
  • the above functional unit is also capable of executing some or all of the corresponding methods described in the foregoing method embodiments.
  • the hardware structure on which the above functional units are based can be seen in the embodiment shown in FIG. I will not repeat them here.
  • Figure 20 shows a functional block diagram of a second device.
  • the second device 2000 includes a receiving unit 2001, a determining unit 2002, and a processing unit 2003.
  • the receiving unit 2001 is configured to receive the first data transmitted by the first device in the first time unit;
  • a determining unit 2002 configured to determine, according to the first time unit, a redundancy version corresponding to the first time unit;
  • the processing unit 2003 is configured to process the first data according to the redundancy version.
  • the above functional unit is also capable of executing some or all of the corresponding methods described in the foregoing method embodiments.
  • the hardware structure on which the above functional units are based can be seen in the embodiment shown in FIG. I will not repeat them here.
  • the above-described method for determining the data of the repeated transmission system bits can ensure high reliability and low latency of data transmission.
  • the program can be stored in a computer readable storage medium, when the program is executed
  • the flow of the method embodiments as described above may be included.
  • the foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

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Abstract

本申请实施例公开了一种数据传输方法和相关设备，该方法包括：第一设备在第一时间单元集合内向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；当满足第一条件时，所述第一设备在第M个时间单元停止传输所述第一数据，2≤M≤K，M为整数。能够在K次重复传输系统比特中，确定所要传输的由该系统比特确定的数据，保证了数据传输的高可靠性和低时延性。

Description

一种数据传输方法和相关设备
本申请要求于2017年03月24日提交中国专利局、申请号为201710184872.1、申请名称为“一种数据传输方法和相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种数据传输方法和相关设备。
背景技术
在传统的LTE系统中，可通过采用混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)机制来保证数据传输的可靠性。具体的，第一设备在向第二设备初次传输数据后，第二设备会针对第一数据传输的数据反馈HARQ-ACK，其中HARQ-ACK包括：确认应答(Acknowledgement，ACK)和否认应答(Negative ACKnowledgement，NACK)。当第一设备接收到NACK时，则需要再次向第二设备传输该数据，直至第一设备接收到ACK。传统的HARQ机制下，能够保证数据传输的可靠性，但增加了数据传输的时延。也就是说，如果第一设备初次传输的数据没有被第二设备正确接收的情况下，需要再次向第二设备传输该数据，直至接收到第二设备反馈的ACK。并且，第一设备有可能需要在接收到第二设备的调度信息的情况下，才能够再次向第二设备传输数据。第一设备接收第二设备的调度信息以及再次传输数据的过程，均增加了数据传输的时延。
在第五代(5 th Generation，5G)移动通信标准的讨论中，针对超可靠性低时延通信(Ultra-Reliable and Low Latency Communications，URLLC)的场景，为了同时保证数据传输的高可靠性和低时延性，允许第一设备中存在待传输的信息比特时，对该待传输的系统比特进行K次重复传输(repetition)。这种方式在能够保证数据传输的高可靠性的同时，也保证了数据传输的低时延性。
其中，第一设备不会直接将待传输的系统比特进行传输，第一设备是通过传输包含部分或全部待传输的系统比特的数据来实现传输系统比特。具体的，第一设备会对待传输的系统比特进行信道编码等处理以生成所要传输的数据。第一设备在对该待传输的系统比特进行信道编码后，会生成与该待传输的系统比特对应的冗余比特，并根据第一设备所使用的冗余版本(Redundancy Version，RV)，确定所要传输的数据，该数据由系统比特和/或冗余比特构成。可以得知，如果第一设备使用的冗余版本不同，则生成的所要传输的数据不同，即所要传输的数据中包括的系统比特和/或冗余比特的构成比例不同。如何确定第一设备在K次重复传输中所要传输的数据，是本领域技术人员积极研究的课题。
发明内容
本申请实施例提供了一种数据传输方法和相关设备，能够在K次重复传输系统比特中，确定每次所要传输的由该系统比特确定的数据，保证了数据传输的高可靠性和低时延性。
第一方面，提供了一种数据传输方法，应用于第一设备，所述方法可包括：
第一设备在第一时间单元集合内向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；当满足第一条件时，所述第一设备在第M个时间单元停止传输所述第一数据，2≤M≤K，M为整数。
结合第一方面，在一些可能的实现方式中，所述第一设备在第一时间单元集合内向第二设备重复传输第一数据之前，还包括：当满足第二条件时，所述第一设备确定重复传输所述第一数据；所述第二条件包括：所述第一设备从所述第二设备接收到配置信息，则所述第一设备确定重复传输第一数据，其中，所述配置信息与所述第一设备的传输资源相对应；或者，所述第一设备确定用于传输所述系统比特的传输码率大于第一阈值，则所述第一设备确定重复传输第一数据。
结合第一方面，在一些可能的实现方式中，所述传输码率是根据所述系统比特的比特数、所述系统比特对应的占用资源数和调制方式确定的，所述第一阈值为所述系统比特对应的信道编码的码率。
结合第一方面，在一些可能的实现方式中，所述第一条件包括：所述第一设备接收到所述第二设备针对所述第一数据的第一反馈信息，所述第一反馈信息用于指示所述第一数据的接收状态，所述第一数据的接收状态包括正确接收、错误接收或接收到；或者，所述第一设备向所述第二设备重复传输所述第一数据的次数达到第二阈值。
结合第一方面，在一些可能的实现方式中，所述第一条件包括：所述第一设备接收到所述第二设备针对所述第一数据的第一反馈信息，所述第一反馈信息用于指示所述第一数据的接收状态，所述第一数据的接收状态包括错误接收或接收到；或者，所述第一设备向所述第二设备重复传输所述第一数据的次数达到第二阈值；在所述第一设备在第M个时间单元停止传输所述第一数据之后，所述方法还包括：所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，所述第二时间单元集合包括所述第M个时间单元至所述第K个时间单元。
结合第一方面，在一些可能的实现方式中，所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，包括：所述第一设备在所述第二时间单元集合内向所述第二设备重复传输所述系统比特，直至所述第一设备从所述第二设备接收到针对所述系统比特的第二反馈信息；或者，所述第一设备在所述第二时间单元集合内向所述第二设备重复传输所述系统比特，直至所述第一设备向所述第二设备重复传输所述系统比特的次数达到第三阈值。
结合第一方面，在一些可能的实现方式中，所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，包括：所述第一设备在所述第二时间单元集合中的第N个时间单元传输第二数据，所述第二数据是根据第二冗余版本和所述待传输的系统比特确定的，N为正整数。
结合第一方面，在一些可能的实现方式中，所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，包括：所述第一设备在所述第二时间单元集合中的第N个时间单元至第J个时间单元重复传输所述第二数据，N<J，J为整数。
第二方面，提供了一种数据传输方法，应用于第二设备，所述方法可包括：第二设备 在第一时间单元集合内接收第一设备重复传输的第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；当满足第一条件时，所述第二设备在第M个时间单元停止接收所述第一数据，2≤M≤K，M为整数。
结合第二方面，在一些可能的实现方式中，所述第二设备在第一时间单元集合内接收第一设备重复传输的第一数据之前，还包括：所述第二设备向所述第一设备发送配置信息，其中，所述配置信息用于指示所述第一设备重复传输所述第一数据。
结合第二方面，在一些可能的实现方式中，所述第一条件包括：所述第二设备向所述第一设备发送针对所述第一数据的反馈信息，所述反馈信息用于指示对所述第一数据的接收状态，所述对所述第一数据的接收状态包括正确接收、错误接收或接收到；或者，所述第二设备重复接收所述第一数据的次数达到第二阈值。
结合第二方面，在一些可能的实现方式中，所述第二设备在第一时间单元集合内接收第一设备重复传输的第一数据之后，还包括：当所述第二设备确认接收到所述第一数据时，向所述第一设备发送针对所述第一数据的反馈信息，所述反馈信息用于指示接收到所述第一数据。
结合第二方面，在一些可能的实现方式中，所述第二设备确认接收到所述第一数据包括：所述第二设备根据所述第一数据的签名信息，确定接收到所述第一数据。
结合第二方面，在一些可能的实现方式中，所述第二设备确认接收到所述第一数据后，确认对所述第一数据正确接收或错误接收；所述第二设备向所述第一设备发送反馈信息，所述反馈信息用于指示所述第一数据被正确接收或被错误接收。
结合第二方面，在一些可能的实现方式中，当所述反馈信息用于指示所述第一数据被错误接收或用于指示接收到所述第一数据，或者，所述第二设备重复接收所述第一数据的次数达到所述第二阈值，所述第二设备在第二时间单元集合内接收所述第一设备重复传输的所述系统比特，所述第二时间单元集合为包括所述第M个时间单元至所述第K个时间单元的时间单元集合。
结合第二方面，在一些可能的实现方式中，所述第二设备在第二时间单元集合内接收所述第一设备重复传输的所述系统比特，所述第二时间单元集合包括所述第M个时间单元至所述第K个时间单元。
结合第二方面，在一些可能的实现方式中，所述第二设备在第二时间单元集合内接收所述第一设备重复传输的所述系统比特，包括：所述第二设备在第二时间单元集合内接收所述第一设备重复传输的所述系统比特，直至所述第二设备向所述第一设备发送针对所述系统比特的反馈信息；或者，所述第二设备重复接收所述系统比特的次数达到第三阈值。
结合第二方面，在一些可能的实现方式中，所述第二设备在第二时间单元集合内接收所述第一设备重复传输的所述系统比特，包括：所述第二设备在所述第二时间单元集合中的第N个时间单元接收第二数据，所述第二数据是根据第二冗余版本和所述系统比特确定的，N为正整数。
结合第二方面，在一些可能的实现方式中，所述第二设备在第二时间单元集合内接收所述第一设备重复传输的所述系统比特，包括：所述第二设备在所述第二时间单元集合中 的第N个时间单元至第J个时间单元接收所述第一设备重复传输的所述第二数据，N<J，J为整数。
结合第一方面和第二方面，在一些可能的实现方式中，重复传输所述第一数据的次数与重复传输所述第二数据的次数不同。
结合第一方面和第二方面，在一些可能的实现方式中，所述第一冗余版本与所述第二冗余版本相同，或者，所述第一冗余版本与所述第二冗余版本不同。
结合第一方面和第二方面，在一些可能的实现方式中，所述第一冗余版本的版本号为0。
结合第一方面和第二方面，在一些可能的实现方式中，重复传输所述第二数据的次数是由所述第一设备在未接收到所述第二设备的配置信息的情况下确定的，所述配置信息用于指示所述第二数据的重复传输的次数。
结合第一方面和第二方面，在一些可能的实现方式中，所述第三阈值是根据接收到的RRC信令、广播信令或者动态信令预配置的；或者，所述第三阈值是所述第一设备根据针对所述待传输的系统比特的时延需求确定的。
结合第一方面和结合第二方面，在一些可能的实现方式中，所述签名信息包括解调参考信号或者前导信息。
第三方面，提供了一种数据传输方法，应用于第一设备，所述方法可以包括：第一设备确定待传输的系统比特和第一时间单元；所述第一设备根据所述第一时间单元，确定与所述第一时间单元对应的冗余版本；所述第一设备根据所述冗余版本和所述待传输的系统比特，确定第一数据；所述第一设备在所述第一时间单元向所述第二设备传输所述第一数据。
第四方面，提供了一种数据传输方法，应用于第二设备，所述方法可以包括：第二设备在第一时间单元接收第一设备传输的第一数据；所述第二设备根据所述第一时间单元，确定所述第一时间单元对应的冗余版本；所述第二设备根据所述冗余版本，对所述第一数据进行处理。
结合第三方面和第四方面，在一些可能的实现方式中，所述根据所述第一时间单元，确定所述第一时间单元对应的冗余版本，包括：根据所述第一时间单元的索引号，确定与所述第一时间单元对应的冗余版本。
第五方面，提供了一种第一设备，所述第一设备包括的功能单元用于执行第一方面中的部分或全部方法。
第六方面，提供了一种第二设备，所述第二设备包括的功能单元用于执行第二方面中的部分或全部方法。
第七方面，提供了一种第一设备，所述第一设备包括的功能单元用于执行第三方面中的部分或全部方法。
第八方面，提供了一种第二设备，所述第一设备包括的功能单元用于执行第四方面中的部分或全部方法。
第九方面，提供了一种第一设备，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
所述处理器执行所述计算机程序实现第一方面中所述数据传输方法的步骤。
第十方面，提供了一种第二设备，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
所述处理器执行所述计算机程序实现第二方面中所述数据传输方法的步骤。
第十一方面，提供了一种第一设备，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
所述处理器执行所述计算机程序实现第三方面中所述数据传输方法的步骤。
第十二方面，提供了一种第二设备，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
所述处理器执行所述计算机程序实现第四方面中所述数据传输方法的步骤。
本申请实施例中，第一设备通过在第一时间单元集合向第二设备重复传输第一数据，并在满足第一条件时，在第M个时间单元停止传输所述第一数据，能够在K次重复传输系统比特中，确定所要传输的由该系统比特确定的数据，保证了数据传输的高可靠性和低时延性。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1是本申请实施例提供的一种无线通信系统的架构示意图；
图2是本申请实施例公开的Turbo编码的一种缓冲区的示意图；
图3A至图3C是本申请实施例公开的第一时间单元集合中的时间单元组成示意图；
图4是本申请实施例公开的一种数据传输方法的流程示意图；
图5A是本申请实施例公开的重复传输第一数据的第一实施例的时序示意图；
图5B是本申请实施例公开的重复传输第一数据的第二实施例的时序示意图；
图6是本申请实施例公开的另一种数据传输方法的流程示意图；
图7是本申请实施例公开的重复传输第一数据的第三实施例的时序示意图；
图8、图9、图10A至图10C、图11A至图11B是本申请实施例公开的第一设备在第二时间单元集合内重复传输系统比特的一些实施例的时序示意图；
图12是本申请实施例公开的又一种数据传输方法的流程示意图；
图13是本申请实施例公开的一种第一设备的结构示意图；
图14是本申请实施例公开的一种第二设备的结构示意图；
图15是本申请实施例公开的另一种第一设备的结构示意图；
图16是本申请实施例公开的另一种第二设备的结构示意图；
图17是本申请实施例公开的一种第一设备的功能框图；
图18是本申请实施例公开的一种第二设备的功能框图；
图19是本申请实施例公开的一种第一设备的功能框图；
图20是本申请实施例公开的一种第二设备的功能框图。
具体实施方式
本申请的实施方式部分使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。
为了便于了解本申请实施例，首先介绍本申请实施例涉及的无线通信系统及相关应用场景。
请参见图1，图1示出了本申请涉及的一种无线通信系统100。无线通信系统包括基站(Base Station)101和用户设备(User Equipment)103。
在本申请的一些实施例中，基站101可以包括：基站收发台(Base Transceiver Station)，无线收发器，一个基本服务集(Basic Service Set，BSS)，一个扩展服务集(Extended Service Set，ESS)，NodeB，eNodeB，HeNodeB，Relay，Femto，Pico，或者应用5G技术标准的基站设备例如gNodeB(gNB)等等。无线通信系统100可以包括几种不同类型的基站101，例如宏基站(macro base station)、微基站(micro base station)等。基站101可以应用不同的无线技术，例如小区无线接入技术，或者WLAN无线接入技术。
用户设备103可以分布在整个无线通信系统100中，可以是静止的，也可以是移动的。在本申请的一些实施例中，用户设备103可以包括：移动设备，移动台(mobile station)，移动单元(mobile unit)，无线单元，远程单元，用户代理，移动客户端，Relay，或者应用在5G技术标准的用户设备等等。
基站101和用户设备103之间能够通过无线接入网(Radio Access Network，RAN)实现数据传输。
对于本申请中的一些实施例，第一设备可以为基站，相应的，第二设备可以为用户设备。或者，对于本申请中的又一些实施例，第一设备可以为用户设备，相应的，第二设备可以为基站。在此，本申请不做具体限定。
基于图1所示的无线通信系统，下面简单介绍本申请公开的第一设备实现重复传输系统比特的方式。
第一设备首先可以确定待传输的系统比特。本申请所描述的系统比特可以是传输块(Transmission Block，TB)或者码块(Code Block，CB)，或者说，本申请所描述的系统比特的大小(即系统比特数)可以是传输块大小(Transmission Block Size，TBS)。举例说明，如果系统比特的比特数为z，系统比特的内容表达形式可以为X(z-1)X(z-2)X(z-3)……X(0)，其中X(i)代表系统比特位，X(i)的取值为0或1，0≤i≤z-1且i为整数，X(z-1)表示最高有效位(Most Significant Bit，MSB)，X(0)表示最低有效位(Least Significant Bit，LSB)。确定待传输的系统比特包括确定待传输的系统比特的大小(或个数)和/或系统比特的内容。
其中，第一设备确定待传输的系统比特的大小可以至少通过以下方式：
(1)第一设备根据免授权(Grand Free)的传输资源确定待传输的系统比特的大小。其中，传输资源包括时域资源、频域资源、码本中的至少一种。可以理解的是，在这种方式下，待传输的系统比特的大小可以与不同的传输资源相对应。例如，假设传输资源包括N个不同的时频资源，分别用时频资源#1、时频资源#2、……、时频资源#N表示，则可以分别对应系统比特大小#1(例如100bits)、系统比特大小#2(例如500bits)、……、系统 比特大小#N(例如1000bits)。免授权的传输资源可以是第二设备预配置的；和/或，是第二设备通过动态信令通知的；或者，是第一设备根据事件驱动选择的；或者，是预定义的。在本申请中，预配置的方式，包括第二设备通过无线资源控制(Radio Resource Control，RRC)信令配置实现，以第一设备为UE为例，该RRC信令可以是UE dedicated信令(即只对单个UE有效)，或者是用户组信令(即对于用户组内包括的UE均有效)，或者，该RRC信令也可以是广播信令；其中动态信令包括物理层信令，即免授权的传输资源可以通过物理层下行控制信道承载的控制信息通知，在本发明实施例中，物理层下行控制信道可以包括物理下行控制信道(Physical Downlink Control Channel，PDCCH)或者增强物理下行控制信道(Enhanced Physical Downlink Control Channel，EPDCCH)传输，或者其他物理下行信道，例如第五代(5th Generation)通信技术标准中使用的下行信道，在此不作具体限定。需要说明的是，当免授权的传输资源通过第二设备预配置和第二设备动态信令通知时，一种实施方式是，第二设备可以预配置多个免授权的传输资源，然后再利用动态信令通知第一设备具体使用哪个免授权的传输资源。第一设备根据事件驱动选择，例如第一设备根据业务传输需求，确定用于传输该系统比特的免授权的传输资源。需要说明的是，上述对于预配置、动态信令的说明，也适用于本申请其他实施部分。
(2)第一设备根据第二设备发送的调度信息确定待传输的系统比特的大小。在此方式下，调度信息可以通过物理层信令通知实现，例如可以承载在物理层下行控制信道中，也可以通过RRC信令通知实现，对物理层信令和RRC信令的解释可以参考(1)，在此不作赘述。调度信息可以直接指示待传输的系统比特大小，或者，间接指示待传输的系统比特大小。调度信息间接指示待传输的系统比特大小的一种方式为调度信息可以指示编码调制方案(Modulation Coding Scheme，MCS)和分配的资源块(Resource Block，RB)大小，由第一设备根据MCS和RB大小来确定待传输的系统比特大小，在5G通信技术中，分配的资源块也可以用其他参数来表征，主要表示用于传输该系统比特的时频资源。
(3)第一设备根据实际传输需求确定待传输的系统比特的大小。
第一设备还可以根据其他方式确定待传输的系统比特的大小，在此不作限定。
另一方面，第一设备确定待传输的系统比特的内容，可以根据实际传输需求例如实际传输的内容确定。
当第一设备确定待传输的系统比特后，在传输之前，需要对待传输的系统比特进行处理。例如，添加CRC校验位(也可以称为奇偶校验比特(Parity bit(s))和对系统比特进行信道编码。信道编码可以包括：Turbo码、咬尾卷积码(Tail biting convolutional coding)、极化码(Polar Code)、低密度奇偶校验码(Low-density parity-check code，LDPC code)，也可以包括其他形式的编码，在此不作具体限定。
以信道编码为Turbo码为例，对待传输的系统比特的信道编码过程进行解释说明。
请参阅图2，图2是本申请公开的一种将待传输的系统比特进行Turbo编码的方式。如图2所示，该图2所示，假设待传输的系统比特的比特数为P个，在经过码率为1/3的Turbo编码后，会产生比特数为3P个的信道编码数据，该信道编码数据中包括P个系统比特和2P个冗余比特。
在本申请实施例中，经过信道编码之后，第一设备会根据实际传输数据的资源大小， 确定应该从比特数为3P个的信道编码数据中选择多少个比特数进行传输。具体选择过程可以是：比特数为3P个的信道编码数据按照某种预设规则被依次放在一个缓冲区内，需要说明的是，在本申请实施例中，缓冲区只是为了便于说明不同冗余版本对应的不同的信道编码数据，并不代表，在第一设备侧，一定存在缓冲区。换句话说，在第一设备侧，其装置可以包括该缓冲区，也可以不包括该缓冲器，在此不作具体限定。为了便于说明不同冗余版本对应的信道编码数据起点，图2中假设缓冲区为环形缓冲区，冗余版本用于指示从环形缓冲区开始取数据的起始位置。例如，如图2所示，当前支持的四个冗余版本分别为RV0、RV1、RV2和RV3。各冗余版本所指示的取数据的起始位置可参见图中的箭头的指示位置。不同冗余版本所指示的开始取数据的起始位置不同，进而不同冗余版本所取的数据不同。从环形缓冲区中取出的信道编码数据的比特数可以与实际传输数据的资源大小相关。可选地，实际传输数据的资源大小与实际传输数据所采用的时频资源大小和MCS相关，或者说，与实际传输数据所采用的时频资源大小和调制方式有关，或者，更为一般地，与实际传输数据的资源所能承载的比特数量有关。在这里，实际传输数据表示，第一设备在传输该信道编码数据时，在使用的时频资源上承载的数据。例如，假设第一设备使用X个RB块传输数据，则这X个RB块上承载的数据可以看为是实际传输数据。需要说明的是，时频资源包括时间资源和频率资源。调制方式包括但不限于：BPSK、QPSK、16QAM、64QAM、256QAM，1024QAM。在本发明实施例中，从信道编码数据构成的缓冲区内选择一定数量的信道编码数据，以使得选取之后的信道编码数据可以适配到用于传输该系统比特的时频资源的过程，可以看为速率匹配的过程。可以理解的是，对系统比特进行处理(该处理包括以下至少一项：添加CRC，信道编码、速率匹配、信道交织、码块分割、码块级联、加扰、调制、层映射、预编码、资源元素映射、生成输出符号)之后得到的数据，传输该数据的时频资源在本发明实施例中为传输该系统比特的时频资源。
第一设备对待传输的系统比特进行处理后确定的数据即为待传输的数据，在本申请实施例中，第一设备对待传输的系统比特进行处理，至少包括：通过该处理，将待传输的系统比特转换为实际传输数据所采用的时频资源上承载的数据。例如假设待传输的系统比特的大小为L个比特，实际传输数据所采用的时频资源上可以承载J个比特，第一设备对待传输的系统比特进行处理，包括对L个比特进行处理，得到J个比特，L和J为整数。可选地，第一设备对待传输的系统比特，添加CRC，进行信道编码和速率匹配，可以看为对待传输的系统比特进行处理的过程。或者更为一般地，如上所述，对待传输的系统比特进行处理的过程，包括以下至少一项：添加CRC，信道编码、速率匹配、信道交织、码块分割、码块级联、加扰、调制、层映射、预编码、资源元素映射、生成输出符号。
可以理解的，第一设备根据不同的冗余版本，对于相同的待传输的系统比特，会确定出不同的待传输的数据。而第一设备实际传输给第二设备的内容是系统比特，而不同的数据对应的系统比特是相同的。
第一设备在确定出待传输的系统比特对应的待传输的数据后，第一设备会在第一时间单元集合中传输K次数据，其中每次传输的数据均是根据同一个待传输的系统比特确定的，则可认为第一设备在第一时间单元集合中重复传输K次待传输的系统比特。
第一时间单元集合中包括K个时间单元，每个时间单元传输一次数据。本申请实施例 中，K为大于等于3的整数。本申请实施例中所描述的时间单元可以表示为传输时间间隔(Transmission Time Interval，TTI)，TTI可以作为数据传输的最小时间单元，或者，作为数据调度的最小时间单元，TTI的时间长度为1毫秒或者0.5毫秒；或者一个TTI也可以表示为整数个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号，例如每个TTI通过1个或2个OFDM符号表示。
第一时间单元集合中包括的所述K个时间单元，可以是K个连续的时间单元，也可以是K个非连续的时间单元。连续的时间单元是指在时域上时序连续，两个时间单元之间不存在其他时间单元。非连续的时间单元是指在时域上时序可能不连续，即两个时间单元之间可能存在其他未包括在第一时间单元集合中的时间单元。具体可参见图3A至图3C所示。
在此需要说明的是，本申请附图中的第一时间单元集合中时间单元的时序为从左至右，即最左边的时间单元序列为第一个时间单元。
图3A示出了第一时间单元集合包括了6个连续的时间单元。在6个连续的时间单元上，每个时间单元各自传输一次包括系统比特的数据，即在6个连续的时间单元上，重复传输6次系统比特。由于确定数据的冗余版本可能不同，6个时间单元所传输的数据可能相同，也可能不同。
图3B至图3C示出了第一时间单元集合包括了3个(对应图3B)和4个(对应图3C)不连续的时间单元。例如，在时分双工(Time Division Duplex，TDD)系统中，由于子帧配比的原因，有可能导致第一时间单元集合中的时间单元是不连续的；又例如，对于多个HARQ进程的数据传输，也会导致第一时间单元集合中的时间单元不连续，举例说明，图3B中，第一时间单元集合传输的是HARQ进程号(ID)为0的数据，图3B中在第1个时间单元中传输的是HARQ进程号为0的数据，而在第2个时间单元中传输的是其他HARQ进程号(如1)的数据，且HARQ进程号为0对应的系统比特与HARQ进程号为1对应的系统比特不同。在此，3个不连续的时间单元是指3个时间单元中至少存在一个时间单元与其他时间单元不连续。其包括各时间单元与其他时间单元均不连续的情况，如图3B所示；也包括了两个或两个以上的时间单元连续，至少一个时间单元与其他时间单元不连续的情况，如图3C所示。
需要说明的是，第一时间单元集合中的各时间单元内，用于传输数据的时间长度可以相同，也可以不同，在此不作具体限定。
上述方式中，能够实现对系统比特进行K次重复传输。而在K次重复传输系统比特中，如何确定每次所要传输的由该系统比特确定的数据，则是本申请所要解决的技术问题。
结合上述实施例，下面对本申请公开的方法实施例进行描述。
如图4所示，图4是本申请实施例提供的一种数据传输方法的流程示意图。如图4所示，该方法包括以下步骤。
步骤S401，第一设备在第一时间单元集合向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数。
在一些可能的实现方式中，第一设备可以在第一时间单元集合中的任意一个时间单元开始向第二设备重复传输第一数据。优选地，第一设备可以在第一时间单元集合中的第一 个时间单元开始重复传输第一数据，其中第一数据是根据RV0和待传输的系统比特确定的。
需要说明的是，本申请所描述的重复传输数据是指每次传输的数据相同，即每次传输的数据对应的冗余版本相同，并且每次传输的数据对应的系统比特相同。重复传输数据实际是重复传输系统比特的一种具体实现方式。本申请所描述的重复传输系统比特是指重复传输中每次传输的数据对应的系统比特相同，而每次传输的数据的冗余版本可以相同也可以不同，即每次传输的数据可以相同也可以不同。
本申请描述的重复传输数据是指，在没有接收到针对该重复传输数据的反馈之前，第一设备一直传输该数据；和/或，在传输该数据的次数没有满足最大重复传输次数之前，第一设备一直传输该数据。本申请中，针对该重复传输数据的反馈包括对应该数据的确认应答信息或否认应答信息，或者其他反馈信息，这里其他反馈信息可以包括用于调度该数据对应的系统比特的控制信息，也可以包括用于指示接收到该数据的信息。本申请所描述的重复传输系统比特，也可以理解为重复传输TB或者CB。重复传输系统比特是指，在没有接收到第二设备针对该系统比特的反馈之前，第一设备一直传输该系统比特；和/或，传输该系统比特的次数没有满足最大重复传输次数之前，第一设备一直传输该系统比特。本申请中，针对该系统比特的反馈包括对应该系统比特的确认应答信息或否认应答信息，或者其他反馈信息。这里其他反馈信息可以包括用于调度该系统比特的控制信息。
需要说明的是，在本申请中，在重复传输系统比特的时间范围内，可以重复传输根据该系统比特和第一冗余版本确定的第一数据，在此场景下，如果接收到对应该数据的反馈信息，可以不影响该数据对应的系统比特的重复传输，或者可以理解，该数据对应的系统比特可以在上述时间范围内继续重复传输。
第一时间单元集合的起点，或者说第一时间单元集合包括的第一个时间单元在时间上的位置，可以是第一设备根据数据传输需求确定的，或者是，第二设备指示的，或者是，预配置的或预定义的，或者也可以通过其他方式，在此不作具体限定。例如，当第一设备有业务传输需求时或者有待传输的系统比特时，可以理解的是，第一设备需要一定的处理时间，将该系统比特转化为可以传输的数据，在此情况下，第一时间单元集合包括的第一个时间单元在时间上的位置可以是在第一设备准备好传输该系统比特之后距离第一设备可以传输该系统比特最近的一个时间单元。例如，假设第一设备在第#m个时间单元有待传输的系统比特，且第一设备需要2个时间单元才能完成对该系统比特的处理，即将该系统比特处理成可以传输的数据，那么第一设备最早可以在第#(m+3)个时间单元开始传输该系统比特，基于此，可以认为第#(m+3)个时间单元为第一时间单元集合包括的第一个时间单元。如果是第二设备指示的，则可以使用动态信令通知，和/或采用RRC信令通知，和/或采用广播信令通知。
第一时间单元集合包括的时间单元个数(即K个)可以是预配置的，例如第二设备配置第一设备在传输相同的系统比特时，可以重复传输K次；亦或者，第一时间单元集合包括的时间单元个数还可以是第一设备自己选择的，即第一设备自主决定重复传输相同系统比特的次数。亦或者，K也可以是第一设备通过动态信令通知的。
在一些可能的实现方式中，可由第二设备预先配置第一设备重复传输第一数据；或者，第一设备根据事件驱动重复传输第一数据。第二设备可以预先配置重复传输第一数据的起 始时间；或者，第一设备根据事件驱动确定重复传输第一数据的起始时间。第二设备可以向第一设备发送调度信息，该调度信息用于指示第一设备进行重复传输第一数据的传输资源；或者，第一设备通过选择可用的免授权资源来实现对第一数据的重复传输。
可选的，第一设备在满足一定条件下，确定在第一时间单元集合重复传输第一数据。该条件可以至少包括以下条件的任意一种：
(1)第二设备向第一设备发送的配置信息，该配置信息用于指示第一设备重复传输第一数据。可选地，配置信息可以与第一设备的传输资源相对应。举例说明，以第一设备为用户设备为例，在上行免授权(UL Grant Free)的应用场景下，基站可以在为用户设备配置上行免授权传输资源时，同时配置是否需要重复传输第一数据，可选的，基站还可以配置第一数据对应的冗余版本。如果基站为用户设备配置至少两套上行免授权传输资源时，一个免授权传输资源对应一个配置信息，或者，多个免授权传输资源对应一个配置信息。例如，用户设备在使用免授权传输资源A时，获得的配置信息为配置信息A；在使用免授权传输资源B时，获得的配置信息为配置信息B。又例如，用户设备在使用免授权传输资源C或免授权传输资源D时，获得的配置信息为配置信息C；用户设备在使用免授权传输资源E或免授权传输资源F时，获得的配置信息为配置信息D。当然，第二设备还可对第一设备采用其他配置方式，在此不作具体限定。在本申请中，该配置信息可以通过动态信令通知，和/或，通过RRC信令通知，和/或，通过高层广播信令通知，或者是预定义。可以理解的是，是否重复传输第一数据可以理解为第一设备发送待传输的系统比特时的一种传输方式，与在哪个时间单元集合可以无关，因此该配置信息可以只用于指示第一设备重复传输第一数据。至于，第一设备如何确定第一时间单元集合包括的第一个时间单元以及第一时间单元集合包括的时间单元个数，可以参考前面的描述，在此不作赘述。
(2)第一设备如果确定用于传输所述待传输的系统比特的传输码率大于第一阈值，则确定重复传输第一数据。
其中，第一设备用于传输所述待传输的系统比特的传输码率是根据待传输的系统比特的比特数，待传输的系统比特所对应的传输资源数和调制方式确定的。或者说，传输码率是根据待传输的系统比特的比特数和待传输的系统比特对应的传输资源所能承载的比特数确定的。例如，假设待传输的系统比特的比特数为H个，该待传输的系统比特对应的传输资源包括I个资源元素(Resource Element，RE)，并假设传输该待传输的系统比特的调制方式对应的调制阶数为J，则待传输的系统比特对应的传输资源能够承载的比特数为I×J个，则第一设备用于传输所述待传输的系统比特的传输码率为H/(I×J)。调制方式与调制阶数的对应关系可参见表1。上述以RE为例，表示承载一个调制符号的最小时频资源单位，但承载一个调制符号的最小时频资源单位不局限于此，
调制方式 调制阶数
QPSK 2
16QAM 4
64QAM 6
256QAM 8
512QAM 9
1024QAM 10
表1调制方式与调制阶数对应表
其中，第一阈值可以是待传输的系统比特对应的信道编码的码率。
下面以信道编码为Turbo码举例说明上述条件。
假设信道编码为Turbo码，且信道编码码率为1/3，则第一阈值可以确定为1/3。假设待传输的系统比特的比特数为1000(1k)个，且假设对应该系统比特的传输资源包括的RE个数为1000(1k)个，且处理该系统比特采用的调制方式为16QAM，则根据表1，确定16QAM对应的调制阶数为4，根据上述数据，可以确定待传输的系统比特的传输码率为1/4。即待传输的系统比特对应的传输资源可以承载4k个比特的数据。并且，当待传输的系统比特的比特数为1k个时，图2所示的环形缓冲区包括1k个待传输的系统比特和2k个冗余比特。当第一设备确定传输的数据的比特数为4k时，从环形缓冲区取出4k个比特的数据，这4k个比特的数据能够包括全部待传输的系统比特，则第一设备无需确定重复传输的数据的冗余版本。也就是说，当待传输的系统比特对应的传输码率小于或等于第一阈值时，每个冗余版本对应的待传输的系统比特的比特数一致，且包括全部待传输的系统比特，则无需重复传输第一冗余版本对应的第一数据。当待传输的系统比特对应的传输码率大于第一阈值时，例如Turbo编码中，无法从环形缓冲区中取出全部比特，则冗余版本所对应的起点位置能够决定根据每个冗余版本所取数据中包括的系统比特的比特数。本申请中，可确定第一冗余版本为能够包括最多系统比特的比特数的数据所对应的冗余版本。
举例说明，假设第一设备为用户设备，在上行免授权传输的应用场景下，如果上行免授权传输资源和待传输的系统比特的比特数都是基站预配置的，那么用户设备确定用于传输待传输的系统比特的传输码率可以根据预配置的系统比特的比特数，上行免授权传输资源的资源数目(如RE数目)以及调制方式确定。或者，传输码率也可以是基站预配置的。或者，传输码率也可以是用户设备预定义的。在此不作具体限定。
在本申请中，第一阈值还可以是第二设备直接配置的，其中第二设备可以通过和/或高层信令(例如RRC信令、广播信令)配置第一阈值。
更为一般地，在本申请中，第一设备如果确定在重复传输系统比特的过程中，不同冗余版本和该系统比特确定的不同传输数据，包括的系统比特个数基本相同，那么第一设备可以确定不需要重复传输第一数据，否则，第一设备可以确定重复传输第一数据。
第一设备通过重复传输第一数据，并且该第一数据与第一冗余版本对应，则无论第二设备是否能够正确接收该第一数据，都能够降低第二设备漏检该第一数据的概率，第二设备接收到包括系统比特更多的第一数据，更有助于第二设备正确接收待传输的系统比特，从而进一步降低数据传输时延。
步骤S402，第二设备接收第一数据。
在一些可能的实现方式中，第二设备通过第一数据的签名信息确认接收到第一数据。其中，第一数据的签名信息可以包括第一数据对应的解调参考信号(Demodulation Reference Signal，DMRS)、前导(Preamble)等。这里，如果用DMRS来区分第一数据和 其他数据，则可利用DMRS所占用的时间和/或频率资源不同，或者DMRS序列形式的不同。在此，其他数据是指由其他冗余版本和所述待传输的系统比特确定的，即第一数据和其他数据的区别在于对应的冗余版本不同，而对应的待传输的系统比特相同。例如，第一数据和其他数据对应的DMRS所占用的时间和/或频率资源不同，或第一数据和其他数据对应的DMRS的序列形式可以不同，以区分第一数据和其他数据。可以理解的是，当第一数据和其他数据对应的DMRS所占用的时间和/或频率资源不同，且DMRS与传输数据所使用的时频资源位置相关时，那么，传输第一数据和传输其他数据所使用的时频资源是不同的。
可选的，第二设备在接收到第一数据后，还可进一步对第一数据进行解析，并产生接收结果。接收结果包括正确接收或错误接收。
步骤S403，第二设备向第一设备发送反馈信息，所述反馈信息用于指示所述第二设备对所述第一数据的接收状态。
在一些可能的实现方式中，第二设备在确定接收到第一数据后，即可发送反馈信息，该反馈信息用于指示第一数据被接收到；或者，在对第一数据进行解析后，发送反馈信息，该反馈信息用于指示第一数据被正确接收(ACK)或错误接收(NACK)。
第二设备在确定接收到第一数据，即发送反馈信息能够进一步降低数据传输时延，能够使第一设备尽早准备其他数据的传输。例如，若第一数据对应的冗余版本为RV0，第二设备接收到第一数据即发送反馈信息，能够使第一设备根据其他冗余版本确定其他数据，通过传输其他数据，能够为第二设备接收该系统比特提供更多的冗余编码增益，从而提高了数据传输可靠性。
可以理解的，第二设备向第一设备发送反馈信息，该反馈信息用于指示第二设备的接收状态。接收状态包括接收到、正确接收或错误接收。
在一些可能的实现方式中，反馈信息的具体形式可以通过确认应答(Acknowledgement，ACK)表示正确接收，否认应答(Negative ACKnowledgement，NACK)表示错误接收，也可以通过新数据指示(New Date Indicator，NDI)来表示，例如可以通过NDI的数值来表示ACK或者NACK，亦或者，可以通过NDI的数值是否翻转来表示ACK或者NACK，反馈信息还可以采用其他表示形式，在此不作具体限定。
在一些可能的实现方式中，第二设备可以通过物理混合重传指示信道(Physical Hybrid-ARQ Indicator Channel，PHICH)传输反馈信息，或者通过物理下行控制信道(Physical Downlink Control Channel，PDCCH)或者增强物理下行控制信道(Enhanced Physical Downlink Control Channel，EPDCCH)传输反馈信息，也可以通过其他下行信道传输，例如第五代(5 th Generation)通信中使用的下行信道，在此不作具体限定。优选地，该反馈信息中不包括第二设备对该系统比特的调度信息，例如该反馈信息中只包括确认应答或否认应答或者接收到该系统比特的应答。
步骤S404，第一设备接收所述反馈信息，在第M个时间单元停止重复传输所述第一数据。
在一些可能的实现方式中，第一设备在当前时间单元接收到反馈信息后，需要对反馈信息进行处理，则在下一个时间单元停止传输第一数据。这里M是指第一时间单元集合中的时间单元的编号，第一时间单元集合中的第一个时间单元集合为1。
可选的，第一设备可以在第一时间单元集合中的第一个时间单元开始重复传输第一数据，也可以在第一时间单元集合中的指定的时间单元开始重复传输第一数据。指定的时间单元与第一个时间单元之间的时间间隔可以是预配置的，或者通过其他方式确定，在此不作具体限定。
可以得知，第一设备在第一时间单元集合中重复传输第一数据，该第一数据由第一冗余版本和待传输的系统比特确定，能够提高第二设备接收到第一数据的概率，并且第一设备可以在满足第一条件时，停止重复传输第一数据。上述方法能够保证数据传输的高可靠性以及低时延性。
下面结合附图说明第一设备重复传输第一数据的实现方式。
请参阅图5A，图5A是本申请实施例公开的重复传输第一数据的第一实施例的时序示意图。如图5A所示，以第一时间单元集合包括连续的时间单元为例，在此，第一时间单元集合包括8个时间单元，即K为8。第一设备在第1个时间单元开始重复传输第一数据，当第一个时间单元的第一数据被第二设备接收到后，第二设备能够发送反馈信息。如果反馈信息用于指示第一数据被接收到，第一设备可以在第2个时间单元接收到反馈信息，如图5A所示，则第一设备在第3个时间单元停止传输第一数据，此时，M为3。对于第3个时间单元，如果第一设备在第三时间单元之前已经准备好其他数据，该数据是根据其他冗余版本和待传输的系统比特确定的，例如，第一设备中存储有多个数据缓存区，则第一设备可在第3个时间单元传输其他数据。或者，如果第一设备在接收到反馈信息之后，需要处理时延来准备其他数据，那么第一设备可以在第4个时间单元开始传输其他数据，在第3个时间单元上不传输该系统比特，但不排除传输其他系统比特。第一设备在停止传输第一数据后，对于第一设备在第3个时间单元至第8个时间单元的数据传输方式不作具体限定。另外，如果考虑自包含(Self-contained)的反馈系统，那么在图5A中，第一设备最快可以在第一时间单元内就接收到第二设备对于该第一数据发送的反馈信息，在此情况下，第二设备可以在第2个时间单元停止重复传输第一数据，此时M为2。
请参阅图5B，图5B是本申请实施例公开的重复传输第一数据的第二实施例的时序示意图。如图5B所示，以第一时间单元集合包括连续的时间单元为例，在此，第一时间单元集合包括8个时间单元，即K为8。第一设备在第1个时间单元开始重复传输第一数据，当第一个时间单元的第一数据被第二设备接收到后，第二设备能够发送反馈信息。图5B所示的实施例中，反馈信息用于指示第一数据被正确接收或被错误接收。由于第二设备需要对第一数据进行处理，相较于图5A，图5B中第一设备接收到反馈信息的时间单元晚于图5A中第一设备接收到反馈信息的时间单元。如图5B所示，第一设备在第5个时间单元接收到反馈信息，在此，M为6。
图5B中，如果反馈信息用于指示第一数据被正确接收，则第一设备在第6个至第8个时间单元停止传输待传输的系统比特。即第一设备在第6个至第8个时间单元不再传输待传输的系统比特对应的数据。可选地第一设备能够在第6个至第8个时间单元传输其他待传输的系统比特，或者说传输其他待传输的系统比特对应的数据。
如果反馈信息用于指示第一数据被错误接收，则第一设备可以在第6个至第8个时间单元继续重复传输第一数据对应的待传输的系统比特，第一设备在第6个至第8个时间单 元的数据传输方式不作具体限定。可选地，第一设备在第6个至第8个时间单元内传输该待传输的系统比特对应的冗余版本与第一冗余版本不同；或者，第一设备在第6个至第8个时间单元内传输该待传输的系统比特对应的冗余版本可以与第一冗余版本相同，即第一设备在第6个至第8个时间单元内的至少一个时间单元上仍然可以传输第一数据，但是在此时间范围内第一数据重复传输的次数的确定与第一设备在第1个至第5个时间单元重复传输第一数据次数的确定方法不同。在本发明实施例中，第一设备在收到反馈信息之前，重复传输第一数据的次数与该反馈信息有关，即第一设备什么时候收到反馈信息，就可以在什么时候结束重复传输第一数据。而在收到反馈信息之后，第一设备是否在第一时间单元集合剩余的时间单元内重复传输第一数据，或者非重复传输第一数据，可以是第一设备自主选择，或者是第一设备根据第二设备发送的配置信息确定。该配置信息可以是物理层信令，也可以是高层信令例如RRC广播信令、RRC dedicated信令，或者，也可以是媒体介入控制(Medium Access Control，MAC)信令，在此不作具体限定。
可以理解的是，如果第一设备具备快速解调数据的能力，那么假设第一设备在第M-1个时间单元接收到第二设备发送的反馈信息，则第一设备最快可以在第M-1个时间单元包括的后段时间内就停止重复传输第一数据，相当于第一设备在第M-1个时间单元内只传输了一部分的第一数据。例如，假设第M-1个时间单元包括14个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号，第二设备发送的反馈信息，是通过在时间上占用2个OFDM符号的物理层下行控制信道发送的，那么第一设备在第M-1个时间单元内的前两个OFDM符号上就可以接收到该反馈信息，因此第一设备可以在第M-1个时间单元的后段时间内停止重复传输第一数据。
请参见图6，图6是本申请实施例提供的又一种数据传输的流程示意图。如图6所示，该方法包括以下步骤。
步骤S601，第一设备在第一时间单元集合向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数。
步骤S602，所述第一设备重复传输第一数据的次数达到第二阈值时，在第M个时间单元停止重复传输所述第一数据。
这里，M的取值为3≤M≤K，即在该实施方式下，第一设备在第一时间单元集合内至少重复传输2次第一数据。
在一些可能的实现方式中，第一设备在第一时间单元集合向第二设备重复传输第一数据，如果第一设备重复传输第一数据的次数达到第二阈值时，仍未收到第二设备发送的针对第一数据的反馈信息，或者如果第一设备重复传输第一数据的次数达到第二阈值时，则第一设备在第M个时间单元停止重复传输所述第一数据。其中，第二阈值可以是预配置的，和/或，通过动态信令通知的，也可以是预定义的，也可以是第一设备自主选择的，在此不作具体限定。例如，如前所述，以第一设备为用户设备为例，在上行免授权(UL grant free)的应用场景下，基站在为用户设备配置上行免授权传输资源时，可以同时配置第一数据的重复传输次数，即配置M-1。又例如，UE还可以根据历史上行数据传输情况，确定第一数据的重复传输次数。比如，UE在第一时间单元集合内重复传输传输第一数据M-1次，且在 停止重复传输第一数据之后的第一时间窗内，接收到基站发送的反馈信息，其中，第一时间窗包括至少一个时间单元，进一步可选地，第一时间窗内包括的第一个时间单元为UE停止重复传输第一数据对应的第一个时间单元(例如图7中的第一时间单元集合包括的第6个时间单元)，则UE可以在下一个第一时间单元集合内减少或增加重复传输第一数据的次数。比如，如果UE在第一时间窗内接收到基站反馈的确认应答信息，该信息用于指示基站正确接收到待传输的系统比特，那么UE可以在下一个第一时间单元集合内减少重复传输第一数据的次数；相反地，如果UE在第一时间窗内接收到基站反馈的否认应答信息，该信息用于指示基站没有正确接收到待传输的系统比特，那么UE可以在下一个第一时间单元集合内增加重复传输第一数据的次数。又例如，UE还可以根据传输待传输的系统比特对应的传输码率，确定第一数据重复传输的次数。传输码率同上说明，在此不作赘述。或者，更为一般地，UE还可以根据每个冗余版本特别是冗余版本0包括的系统比特个数，确定冗余版本0和待传输的系统比特对应的数据的重复传输次数。
本申请实施例中，第二阈值可为M-1。假设处理时间为4个时间单元，则一种情况下，第一时间单元会在第5个时间单元接收到反馈信息，则第二阈值可以设定为5，当然，第二阈值还可以是6；或者，第二阈值是5或6的倍数，例如，第二阈值设定为10，第一设备重复传输第一数据10次。
第一设备重复传输第一数据的具体方式可参见图4所示方法的具体描述，在此不再赘述。
请参阅图7，图7是本申请实施例公开的重复传输第一数据的第三实施例的时序示意图。如图7所示，第一设备从第1个时间单元开始重复传输第一数据，可以理解的，如果第二设备需要对接收到的第一数据进行处理，这里处理，包括从接收到第一数据到恢复出第一数据对应的待传输的系统比特，需要说明的是，恢复出第一数据对应的待传输的系统比特，包括恢复正确和恢复错误。图7中第一时间单元集合包括8个时间单元，即K为8。在第5个时间单元停止重复传输第一数据，此时M为5。第一设备在第6个时间单元至第8个时间单元的数据传输方式在此不作具体限定。
基于图4或图6所示方法，第一设备在第一时间单元集合中的第M个时间单元停止重复传输第一数据后，第一设备可以在第二时间单元集合内重复传输待传输的系统比特。其中，第二时间单元集合包括所述第M个时间单元至所述第K个时间单元。可以理解的是，如果M＝K，则第二时间单元集合只包括一个时间单元，即第一时间单元集合内包括的第K个时间单元。在一种情况下，第二时间单元集合是从第M个时间单元开始至第K个时间单元结束。
在本发明实施例中，第一设备在第二时间单元集合内重复传输待传输的系统比特，直至该第一设备接收到第二设备发送的第二反馈信息，其中第二反馈信息为第二设备针对该系统比特发送的反馈信息，用于指示第二设备对该系统比特的接收状态，这里的接收状态包括：第二设备正确接收到该系统比特，或者第二设备没有正确接收到该系统比特。
作为另外一种实施方式，第一设备在第二时间单元集合内重复传输待传输的系统比特，直至第一设备向第二设备重复传输该系统比特的次数达到第三阈值。
进一步可选地，第一设备向第二设备重复传输该系统比特的次数包括第一数据重复传 输的次数和第一设备在第二时间单元集合内重复传输待传输的系统比特对应的重复次数，例如第三阈值可以等于K(即等于第一时间单元集合包括的时间单元个数)，即当第一设备在第一时间单元内重复传输待传输的系统比特K次后，第一设备可以停止重复传输待传输的系统比特；或者，假设第一设备在第M个时间单元停止重复传输第一数据(可以理解的是，重复传输第一数据的次数为M-1次)，然后在第二时间单元内重复传输该系统比特的次数为K-M+1次，则第一设备可以停止重复传输待传输的系统比特。
或者，可选地，第一设备向第二设备重复传输该系统比特的次数只包括第一设备在第二时间单元集合内重复传输待传输的系统比特对应的重复次数。例如，假设第一设备在第一时间单元集合内重复传输第一数据M-1次，则第三阈值可以等于K-M+1,即当第一设备在第二时间单元集合内重复传输待传输的系统比特K-M+1次时，可以停止重复传输待传输的系统比特。
下面结合附图对第一设备在第二时间单元集合内重复传输待传输的系统比特进行具体说明。
请参见图8，图8是本申请实施例公开的第一设备在第二时间单元集合内重复传输系统比特的第一实施例的时序示意图。如图8所示，第一设备从第一个时间单元开始重复传输第一数据，在第M个时间单元停止重复传输第一数据，第一设备在第M个时间单元停止重复传输第一数据的条件为第一设备接收到第二设备针对第一设备发送的反馈信息，或者，第一设备重复传输第一数据的次数达到第二阈值。第一设备在第二时间单元集合内重复传输第一数据对应的系统比特。在图8中，第二时间单元集合包括第M个时间单元至第K个时间单元。第一设备在第二时间单元集合内可通过其他数据重复传输待传输的系统比特。其他数据是指第一设备在第二时间单元集合中任意一个时间单元传输的数据。其他数据与第一数据对应的待传输的系统比特相同，对应的冗余版本可以相同也可以不同。
下面结合图10A至图10C，对第一设备在第二时间单元集合中的数据传输形式进行说明。第一设备在第二时间单元集合内按照时序关系(时间上从前向后的顺序)在每个时间单元上传输的数据对应的冗余版本可以是预配置的，和/或，动态信令通知的，或者预定义的，或者第一设备从预设的样本库中选取的，也可以通过其他方式，在此不作具体限定。例如，在每个时间单元上传输的数据对应的冗余版本可以依次为：RV2、RV3、RV1，然后依次循环下去，如图10A所示；或者，在每个时间单元上传输的数据对应的冗余版本可以依次为：RV2、RV3、RV1、RV0，然后依次循环下去，如图10B所示；或者，在每个时间单元上传输的数据对应的冗余版本可以依次为RV0、RV2、RV3、RV1，然后依次循环下去；或者，在每个时间单元上传输的数据对应的冗余版本可以依次为RV2、RV0，然后依次循环下去。上述实现方式中，在第二时间单元集合中第一设备还可以对一个冗余版本对应的数据进行重复传输，如图10C所示，在每个时间单元上传输的数据对应的冗余版本依次为RV2、RV3、RV1，每个冗余版本重复传输两次，可选的，RV2/RV3/RV1重复传输的次数也可以不同。可选的，第二时间单元集合还可以仅重复传输第二数据，假设第二数据对应的冗余版本为RV2。则第一设备在第二时间单元集合内可以重复传输第二数据。需要说明的是，可选地，第一设备在第二时间单元集合内，如果重复传输待传输的系统比特对应的数据，则重复次数与重复传输第一数据的次数不同。在上述过程中，第一设备在第二时间单元集合内，传输待 传输的系统比特对应的冗余版本、和/或该冗余版本对应的数据的重复传输次数，可以是预配置的，和/或，通过动态信令通知的，或者是预定义的，或者是第一设备自行选择的，在此不作具体限定。本申请实施例中描述的RV0、RV1、RV2、RV3是指冗余版本的版本号，RV0、RV1、RV2、RV3依次是版本号0、1、2、3。
在一些可能的实现方式中，第一设备还可以在第二时间单元集合的时间单元上接收第二设备的反馈信息，为区别于第一设备在重复传输第一数据时接收的反馈信息，现定义第一设备在重复传输第一数据时接收的反馈信息为第一反馈信息，在第二时间单元集合的时间单元上接收第二设备的反馈信息为第二反馈信息。以图9为例，对第一设备接收第二设备的反馈信息进行说明。图9是本申请实施例公开的一种第一设备在第二时间单元集合内重复传输系统比特的第二实施例的时序示意图。
图9中，假设第一时间单元集合包括10个时间单元，第一设备从第一时间单元集合包括的第一个时间单元开始，重复传输第一数据。如果第一设备在第一时间单元集合包括的第4个时间单元接收到第一反馈信息，且第一反馈信息指示所述第一数据没有被正确接收或者指示所述第一数据被接收到，则第一设备可以从第一时间单元集合包括的第5个时间单元开始，停止重复传输第一数据，并且从第5个时间单元开始，重复传输第一数据对应的系统比特。假设第一设备在第一时间单元集合包括的第8个时间单元接收到第二反馈信息，第二反馈信息指示第一数据对应的信息比特被错误接收，或者被正确接收，则第一设备可以在第一时间单元集合包括的第9个时间单元和第10个时间单元停止重复传输该系统比特。可选地，第一设备仍然可以在第一时间单元集合包括的第9个时间单元和第10个时间单元，传输该系统比特。例如，第一设备可以根据第二设备的调度信息，确定是否需要在第9个时间单元和第10个时间单元传输该信息比特。例如，当第二反馈信息指示该系统比特被错误接收(NACK)时，第二设备还可以发送调度信息，该调度信息用于指示第一设备在第9个时间单元和/或第10个时间单元传输该信息比特。可选地，该调度信息，也可以指示第一设备在第一时间单元集合之外的其他时间单元传输该信息比特。在本发明实施例中，调度信息可以通过物理层信令发送，假设第二设备为基站，则第二设备可通过UL Grant控制信息发送该调度信息。
在一些可能的实现方式中，第二反馈信息与第一反馈信息类似，可以通过PHICH信道传输，也可以通过PDCCH或者EPDCCH，或者其他下行信道传输，第二反馈信息可以通过UE特定的下行控制信道发送(例如UE specific(E)PDCCH)，也可以通过一组UE特定的下行控制信道发送(例如UE group-(E)PDCCH)，或者通过小区公共的下行控制信道发送，在此不作具体限定。第二反馈信息的具体形式，与第一反馈信息的具体形式类似，也可以采用其他形式，在此不作具体限定。
需要说明的是，在上述实施例中描述的重复传输待传输的系统比特或者重复传输的系统比特，也可以理解为重复传输TB或CB。
需要说明的是，在本发明实施例中，第一时间单元集合包括的K个时间单元，是可以用于传输待传输的系统比特的时间单元，可以不包括由于处理时延而导致的无法传输待传输的系统比特的时间单元。假设第一条件为第一设备接收到第二设备发送的针对第一数据的第一反馈信息，即第二设备在接收到第一反馈信息之后，停止重复传输待传输的系统比 特，且第一设备在第二时间单元集合内重复传输该系统比特，直至重复传输该系统比特的次数达到K。图11A示例了一种方式，假设第一时间单元集合包括10个时间单元，第一设备从第一个时间单元开始，重复传输第一数据，且在第4个时间单元接收到第一反馈信息，则第一设备可以在第5个时间单元停止重复传输第一数据。考虑到处理时延，假设第一设备最快可以在第6个时间单元开始传输第二数据(这里，第二数据包括根据第二冗余版本和待传输的系统比特确定的数据，第二冗余版本可以与第一冗余版本相同，也可以不同。在该例子中，优选地，第二冗余版本可以与第一冗余版本不同)，则可以理解的是，第一设备在第5个时间单元，没有传输待传输的系统比特，那么第5个时间单元可以不计入第一时间单元集合内。第一时间单元集合包括的10个时间单元可以分别对应图11A中的第1个时间单元至第4个时间单元，以及第6个时间单元至第11个时间单元。图11B示例了另外一种方式，其中假设第一设备在接收到第一反馈信息之后，有能力在接收到第一反馈信息之后的最近一个时间单元，开始传输第二数据，此时，第一时间单元集合包括的10个时间单元对应图11A中的第1个时间单元至第10个时间单元。
需要说明的是，在本申请中，待传输的系统比特，可以包括奇偶校验位，也可以不包括奇偶校验位。
下面结合图12，介绍另一种数据传输方式。
请参阅图12，图12是本申请实施例提供的又一种数据传输的流程示意图。如图12所示，该方法包括以下步骤。
步骤S1201，第一设备确定待传输的系统比特和第一时间单元，所述第一时间单元用于传输所述系统比特；
步骤S1202，所述第一设备根据所述第一时间单元，确定与所述第一时间单元对应的冗余版本；
步骤S1203，所述第一设备根据所述冗余版本和所述待传输的系统比特，确定第一数据；
步骤S1204，所述第一设备在所述第一时间单元向第二设备传输所述第一数据。
步骤S1205，第二设备在所述第一时间单元接收所述第一设备传输的第一数据；
步骤S1206，所述第二设备根据所述第一时间单元，确定所述第一时间单元对应的冗余版本；
步骤S1207，根据所述冗余版本，对所述第一数据进行处理。
第二设备根据所述冗余版本，对所述第一数据进行处理，包括：第二设备根据所述冗余版本和所述第一数据，确定所述第一数据对应的系统比特信息。第二设备可以根据所述冗余版本和第一数据，确定出第一数据对应的信道编码数据，其中信道编码数据同图2说明，然后根据该信道编码数据恢复对应的系统比特信息。一种可能的实现方式中，第二设备可以通过信道译码对该信道编码数据进行处理，优选地，这种实现方式适用于如下场景：第一数据对应的信道编码数据包括所有待传输的系统比特信息，译码结果可能是正确恢复出该信道编码数据对应的系统比特信息(即译码成功)，也可能是错误恢复出该信道编码数据对应的系统比特信息(即译码失败)；另外一种可能的实现方式中，第二设备可以通过合并检测和/或信道译码对该信道编码数据进行处理，例如第二设备接收到多个对应相同待传 输系统比特的数据，那么第二设备在将这些数据处理为信道编码数据之后，可以将这些数据对应的信道编码数据按照某种规则进行合并，例如通过软合并(Chase Combine，CC)或者增量冗余(Incremental Redundancy，IR)合并，然后再进行信道译码。
更为一般地，在本申请实施例中，第二设备对所述第一数据进行处理，可以是将待传输的系统比特处理为传输数据的过程的逆操作。其中，将待传输的系统比特处理为传输数据的过程如上所述，在此不作赘述。
在一种可能的实现方式中，第一设备和第二设备可以根据第一时间单元的索引号，确定与第一时间单元对应的冗余版本。
在一种可能的实现方式中，第一设备和第二设备确定时间单元与冗余版本的对应关系的具体实现方式可至少包括以下方法：
(1)冗余版本的版本号(RV index)，可以根据下述公式确定：RV Index＝(CURRENT_TTI+Offset)mod numberOfConfRV-Num。
其中，CURRENT_TTI为传输该RV版本号对应的时间单元的索引号。假设一个时间单元为一个子帧，那么该子帧索引号的一种表示方式是可以通过在一个无线帧内的子帧索引来表示，假设一个无线帧包括N个子帧，这N个子帧对应的子帧索引号分别是子帧0，子帧1，……，子帧N-1，那么CURRENT_TTI对应的取值为0至N-1中的任意一个值；又或者，子帧索引号也可以采用在系统内的绝对值来表述，假设在一个系统内，一个无线超帧包括M个无线帧，每个无线帧包括N个子帧，那么CURRENT_TTI对应的取值可以用(SFN*N)+i表示，其中SFN表示系统帧号(System Frame Number)，SFN为大于等于0且小于等于M-1的整数，M为最大的系统帧号，即不同的SFN与不同的无线帧相对应，i为大于等于0且小于等于N-1的整数；又或者，该子帧索引号还可以通过时隙号来表示，假设一个子帧包括2个时隙，那么子帧索引号可以用floor(Ns/2)，其中floor(X)表示对X向下取整，Ns/2表示Ns除以2。
可以理解的是，CURRENT_TTI还可以有其他表示形式，例如在5G通信系统中，还可以采用其他方式来表达，不作具体限定。
上述公式中，X mod Y表示取余操作；其中numberOfConfRV-Num表示在传输或重复传输待传输的系统比特过程中，可以使用的不同RV版本的个数。该参数可以通过预配置实现，和/或，通过动态信令指示，亦或者，该参数是第一设备选择的，在此不作具体限定。类似地，Offset的参数配置方式同numberOfConfRV-Num，或者Offset可以为0，即RV index可以直接通过CURRENT_TTI mod numberOfConfRV-Num来确定。
一种可能的实现方式中，将CURRENT_TTI mod numberOfConfRV-Num的结果直接作为RV版本的版本号。例如假设numberOfConfRV-Num＝4，则CURRENT_TTI mod numberOfConfRV-Num的结果为0，或者为1，或者为2，或者为3，则对应的RV版本的版本号也可以直接为0，或者为1，或者为2，或者为3。另外一种可能的实现方式中，CURRENT_TTI mod numberOfConfRV-Num的结果可以与不同的RV版本的版本号有固定的对应关系，例如CURRENT_TTI mod numberOfConfRV-Num的结果为0，或者为1，或者为2，或者为3，则对应的RV版本号可以为0，或者为2，或者为3，或者为1，该对应关系还可以有其他表示形式，在此不作赘述。该对应关系可以是预配置的，和/或，动态信令通知的， 也可以是预定义的，不作具体限定。
(2)可以针对不同的RV版本，配置不同的起始Offset、周期以及重复次数。例如，第二设备(以基站为例)针对RV0，RV0传输的起始offset为第j个时间单元，周期为S个时间单元，则从时间上看，UE分别在第j+(i-1)*S个时间单元上传输RV0，其中i为不小于0的整数。进一步可选地，基站还可以配置RV0对应的重复传输次数，例如为L次，其中L为不小于2且小于M的整数，则UE分别在第j+(i-1)*S+q个时间单元上传输RV0，其中q为不小于0且小于L的整数。对于其他冗余版本，也存在类似的配置，在此不作赘述。此外，以RV0采用上述配置为例，如果不采用重复传输，则在第j+(i-1)*S个时间单元和第j+i*S个时间单元之间，其他冗余版本例如RV1/RV2/RV3可以按照预配置的图样进行传输；如果RV0采用重复传输，则在第j+(i-1)*S+(L-1)个时间单元和第j+i*S个时间单元之间，其他冗余版本例如RV1/RV2/RV3也可以按照预配置的图样进行传输。
在一种可能的实现方式中，可以针对某个特定的RV版本，配置该RV版本的周期和起始offset，例如，针对RV0，可以配置其周期为RV0-Period，偏移量(offset)为RVO-Offset，其中RVO-Offset的取值为大于等于0且小于等于RV0-Period-1的整数，对应RV0的时间单元的索引号满足如下关系:(10*nf-RV0-Offset+floor(Ns/2))mod RV0-Period＝0，其中时间单元的索引号为10*nf+floor(Ns/2)，其中nf表示无线帧号，10表示每个无线帧包括的子帧个数，Ns表示时隙号，floor(X)含义同前。可以理解的是，在配置RV0-Period和RV0-Offset的情况下，对应RV0的时间单元的索引号还可以有其他表达形式，不作具体限定。进一步可选地，针对该特定的RV版本(例如上例中的RV0)，还可以配置其重复传输的次数，在此情况下，可以理解，通过上述公式确定的时间单元为第一个对应RV0的时间单元。可选地，在针对某个特定的RV版本，配置了周期和起始offset以及重复次数的情况下，对于其他冗余版本，一种可能的实现方式是可以类似RV0进行单独配置，另外一种可能的实现方式是与RV0的配置之间具有特定的关联关系。例如，在非RV0对应的时间单元上，其他RV版本按照固定的图样(pattern)与不同的时间单元相对应，另外，也可以将上述两种可能的实现方式联合使用，例如部分参数是单独配置的，部分参数与RV0的配置之间具有特定的关联关系。
在一种可能的实现方式中，第二设备会根据确定的冗余版本，对第一数据进行信道解码等处理。
可以得知，第一设备确定与第一时间单元对应的冗余版本，能够保证第二设备对第一时间单元上数据对应的冗余版本的判断准确度，进而第二设备可以执行准确的HARQ合并，降低数据传输时延。
结合上述系统及方法实施例，下面介绍本申请实施例中的装置实施例。
请参阅图13，图13是本申请实施例公开的一种第一设备的结构示意图。第一设备1300包括：处理器1301，存储器1302，通信接口1303；处理器1301通过通信接口1303控制与外部网络的无线通信；通信接口1303包括但不限于天线、放大器、收发信机、耦合器、LNA(Low Noise Amplifier，低噪声放大器)、双工器等。存储器1302包括以下至少一种：随机存取存贮器、非易失性存储器以及外部存储器，存储器1302中存储有可执行程序代码，该可执行程序代码能够引导处理器1301执行本发明方法实施例中具体披露的方法，包括以 下步骤：
在第一时间单元集合内向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
当满足第一条件时，在第M个时间单元停止传输所述第一数据，2≤M≤K，M为整数。
应当理解，可执行程序代码能够引导处理器1301执行上述方法实施例中描述的第一设备执行的方法，例如图6所示方法，这里不再赘述。
请参阅图14，图14是本申请实施例公开的一种第二设备的结构示意图。第二设备1400包括：处理器1401，存储器1402，通信接口1403；处理器1401通过通信接口1403控制与外部网络的无线通信；通信接口1403包括但不限于天线、放大器、收发信机、耦合器、LNA(Low Noise Amplifier，低噪声放大器)、双工器等。存储器1402包括以下至少一种：随机存取存贮器、非易失性存储器以及外部存储器，存储器1402中存储有可执行程序代码，该可执行程序代码能够引导处理器1401执行本发明方法实施例中具体披露的方法，包括以下步骤：
第二设备在第一时间单元集合内接收第一设备重复传输的第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
当满足第一条件时，所述第二设备在第M个时间单元停止接收所述第一数据，2≤M≤K，M为整数。
应当理解，可执行程序代码能够引导处理器1401执行上述方法实施例中描述的第二设备执行的方法，例如图4所示方法，这里不再赘述。
请参阅图15，图15是本申请实施例公开的一种第一设备的结构示意图。第一设备1500包括：处理器1501，存储器1502，通信接口1503；处理器1501通过通信接口1503控制与外部网络的无线通信；通信接口1503包括但不限于天线、放大器、收发信机、耦合器、LNA(Low Noise Amplifier，低噪声放大器)、双工器等。存储器1502包括以下至少一种：随机存取存贮器、非易失性存储器以及外部存储器，存储器1502中存储有可执行程序代码，该可执行程序代码能够引导处理器1501执行本发明方法实施例中具体披露的方法，包括以下步骤：
确定待传输的系统比特和第一时间单元；
根据所述第一时间单元，确定与所述第一时间单元对应的冗余版本；
根据所述冗余版本和所述待传输的系统比特，确定第一数据；
在所述第一时间单元向所述第二设备传输所述第一数据。
请参阅图16，图16是本申请实施例公开的一种第二设备的结构示意图。第二设备1600包括：处理器1601，存储器1602，通信接口1603；处理器1601通过通信接口1603控制与外部网络的无线通信；通信接口1603包括但不限于天线、放大器、收发信机、耦合器、LNA(Low Noise Amplifier，低噪声放大器)、双工器等。存储器1602包括以下至少一种：随机存取存贮器、非易失性存储器以及外部存储器，存储器1602中存储有可执行程序代码，该可执行程序代码能够引导处理器1601执行本发明方法实施例中具体披露的方法，包括以 下步骤：
在第一时间单元接收第一设备传输的第一数据；
根据所述第一时间单元，确定所述第一时间单元对应的冗余版本；
根据所述冗余版本，对所述第一数据进行处理。
基于前述实施例描述的硬件结构和前述方法实施例，下面介绍本申请实施例提供的设备的功能框图。第一设备的功能块可由硬件、软件或硬件与软件的组合来实施本发明方案。所属领域的技术人员应理解，本申请所描述的功能块可经组合或分离为若干子块以实施本发明实施例方案。因此，本申请中上面描述的内容可支持对下述功能模块的任何可能的组合或分离或进一步定义。
图17示出了一种第一设备的功能框图。第一设备1700包括：传输单元1701；
其中，传输单元1701，用于在第一时间单元集合内向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
所述传输单元1701，还用于当满足第一条件时，在第M个时间单元停止传输所述第一数据，2≤M≤K，M为整数。
需要说明的是，上述功能单元还能够执行前述方法实施例中描述的对应的部分或全部方法。上述功能单元所基于的硬件结构可参见图13所示实施例。在此不再赘述。
图18示出了一种第二设备的功能框图。第二设备1800包括：接收单元1801；
其中，接收单元1801，用于在第一时间单元集合内接收第一设备重复传输的第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
所述接收单元1801，还用于当满足第一条件时，在第M个时间单元停止接收所述第一数据，2≤M≤K，M为整数。
需要说明的是，上述功能单元还能够执行前述方法实施例中描述的对应的部分或全部方法。上述功能单元所基于的硬件结构可参见图14所示实施例。在此不再赘述。
图19示出了一种第一设备的功能框图。第一设备1900包括第一确定单元1901、第二确定单元1902、第三确定单元1903、传输单元1904。
其中，第一确定单元1901，用于确定待传输的系统比特和第一时间单元；
第二确定单元1902，用于根据所述第一时间单元，确定与所述第一时间单元对应的冗余版本；
第三确定单元1903，用于根据所述冗余版本和所述待传输的系统比特，确定第一数据；
传输单元1904，用于在所述第一时间单元向所述第二设备传输所述第一数据。
需要说明的是，上述功能单元还能够执行前述方法实施例中描述的对应的部分或全部方法。上述功能单元所基于的硬件结构可参见图15所示实施例。在此不再赘述。
图20示出了一种第二设备的功能框图。第二设备2000包括接收单元2001、确定单元2002、处理单元2003。
其中，接收单元2001，用于在第一时间单元接收第一设备传输的第一数据；
确定单元2002，用于根据所述第一时间单元，确定所述第一时间单元对应的冗余版本；
处理单元2003，用于根据所述冗余版本，对所述第一数据进行处理。
需要说明的是，上述功能单元还能够执行前述方法实施例中描述的对应的部分或全部方法。上述功能单元所基于的硬件结构可参见图16所示实施例。在此不再赘述。
综上，上述描述的重复传输系统比特对应数据的确定方式，能够保证数据传输的高可靠性和低时延性。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，该流程可以由计算机程序来指令相关的硬件完成，该程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。

Claims (44)

  1. 一种数据传输方法，其特征在于，包括：
    第一设备在第一时间单元集合内向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
    当满足第一条件时，所述第一设备在第M个时间单元停止传输所述第一数据，2≤M≤K，M为整数。
  2. 如权利要求1所述方法，其特征在于，所述第一设备在第一时间单元集合内向第二设备重复传输第一数据之前，还包括：
    当满足第二条件时，所述第一设备确定重复传输所述第一数据；
    所述第二条件包括：
    所述第一设备从所述第二设备接收到配置信息，则所述第一设备确定重复传输第一数据，其中，所述配置信息与所述第一设备的传输资源相对应；或者，
    所述第一设备确定用于传输所述系统比特的传输码率大于第一阈值，则所述第一设备确定重复传输第一数据。
  3. 如权利要求2所述方法，其特征在于，所述传输码率是根据所述系统比特的比特数、所述系统比特对应的占用资源数和调制方式确定的，所述第一阈值为所述系统比特对应的信道编码的码率。
  4. 如权利要求1-3任一项所述方法，其特征在于，所述第一条件包括：
    所述第一设备接收到所述第二设备针对所述第一数据的第一反馈信息，所述第一反馈信息用于指示所述第一数据的接收状态，所述第一数据的接收状态包括正确接收、错误接收或接收到；或者，
    所述第一设备向所述第二设备重复传输所述第一数据的次数达到第二阈值。
  5. 如权利要求1-3任一项所述方法，其特征在于，所述第一条件包括：
    所述第一设备接收到所述第二设备针对所述第一数据的第一反馈信息，所述第一反馈信息用于指示所述第一数据的接收状态，所述第一数据的接收状态包括错误接收或接收到；或者，
    所述第一设备向所述第二设备重复传输所述第一数据的次数达到第二阈值；
    在所述第一设备在第M个时间单元停止传输所述第一数据之后，所述方法还包括：
    所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，所述第二时间单元集合包括所述第M个时间单元至所述第K个时间单元。
  6. 如权利要求5所述方法，其特征在于，所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，包括：
    所述第一设备在所述第二时间单元集合内向所述第二设备重复传输所述系统比特，直至所述第一设备从所述第二设备接收到针对所述系统比特的第二反馈信息；或者，
    所述第一设备在所述第二时间单元集合内向所述第二设备重复传输所述系统比特，直至所述第一设备向所述第二设备重复传输所述系统比特的次数达到第三阈值。
  7. 如权利要求5或6所述方法，其特征在于，所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，包括：
    所述第一设备在所述第二时间单元集合中的第N个时间单元传输第二数据，所述第二数据是根据第二冗余版本和所述系统比特确定的，N为正整数。
  8. 如权利要求7所述方法，其特征在于，所述第一设备在第二时间单元集合内向所述第二设备重复传输所述系统比特，包括：
    所述第一设备在所述第二时间单元集合中的第N个时间单元至第J个时间单元重复传输所述第二数据，N<J，J为整数。
  9. 如权利要求8所述方法，其特征在于，重复传输所述第一数据的次数与重复传输所述第二数据的次数不同。
  10. 如权利要求7-9任一项所述方法，其特征在于，所述第一冗余版本与所述第二冗余版本相同，或者，所述第一冗余版本与所述第二冗余版本不同。
  11. 如权利要求1-10任一项所述方法，其特征在于，所述第一冗余版本的版本号为0。
  12. 一种数据传输方法，其特征在于，包括：
    第二设备在第一时间单元集合内接收第一设备重复传输的第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
    当满足第一条件时，所述第二设备在第M个时间单元停止接收所述第一数据，2≤M≤K，M为整数。
  13. 如权利要求12所述方法，其特征在于，所述第二设备在第一时间单元集合内接收第一设备重复传输的第一数据之前，还包括：
    所述第二设备向所述第一设备发送配置信息，所述配置信息用于指示所述第一设备重复传输所述第一数据。
  14. 如权利要求12或13所述方法，其特征在于，所述第二设备在第一时间单元集合内接收第一设备重复传输的第一数据之后，还包括：
    当所述第二设备确认接收到所述第一数据时，向所述第一设备发送针对所述第一数据的反馈信息，所述反馈信息用于指示接收到所述第一数据。
  15. 如权利要求14所述方法，其特征在于，所述第二设备确认接收到所述第一数据包括：
    所述第二设备根据所述第一数据的签名信息，确定接收到所述第一数据。
  16. 如权利要求15所述方法，其特征在于，所述签名信息包括解调参考信号或者前导信息。
  17. 一种数据传输方法，其特征在于，包括：
    第一设备确定待传输的系统比特和第一时间单元；
    所述第一设备根据所述第一时间单元，确定与所述第一时间单元对应的冗余版本；
    所述第一设备根据所述冗余版本和所述待传输的系统比特，确定第一数据；
    所述第一设备在所述第一时间单元向所述第二设备传输所述第一数据。
  18. 如权利要求17所述方法，其特征在于，所述第一设备根据所述第一时间单元，确定与所述第一时间单元对应的冗余版本，包括：
    所述第一设备根据所述第一时间单元的索引号，确定与所述第一时间单元对应的冗余版本。
  19. 一种数据传输方法，其特征在于，包括：
    第二设备在第一时间单元接收第一设备传输的第一数据；
    所述第二设备根据所述第一时间单元，确定所述第一时间单元对应的冗余版本；
    所述第二设备根据所述冗余版本，对所述第一数据进行处理。
  20. 一种第一设备，其特征在于，包括：
    第一传输单元，用于在第一时间单元集合内向第二设备重复传输第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
    所述第一传输单元，还用于当满足第一条件时，在第M个时间单元停止传输所述第一数据，2≤M≤K，M为整数。
  21. 如权利要求1所述第一设备，其特征在于，还包括：
    确定单元，用于当满足第二条件时，确定重复传输所述第一数据；
    所述第二条件包括：
    从所述第二设备接收到配置信息，则所述第一设备确定重复传输第一数据，其中，所述配置信息与所述第一设备的传输资源相对应；或者，
    确定用于传输所述系统比特的传输码率大于第一阈值，则确定重复传输第一数据。
  22. 如权利要求2所述第一设备，其特征在于，所述传输码率是根据所述系统比特的比特数、所述系统比特对应的占用资源数和调制方式确定的，所述第一阈值为所述系统比特对应的信道编码的码率。
  23. 如权利要求20-22任一项所述第一设备，其特征在于，所述第一条件包括：
    接收到所述第二设备针对所述第一数据的第一反馈信息，所述第一反馈信息用于指示所述第一数据的接收状态，所述第一数据的接收状态包括正确接收、错误接收或接收到；或者，
    向所述第二设备重复传输所述第一数据的次数达到第二阈值。
  24. 如权利要求20-22任一项所述第一设备，其特征在于，所述第一条件包括：
    所述第一设备接收到所述第二设备针对所述第一数据的第一反馈信息，所述第一反馈信息用于指示所述第一数据的接收状态，所述第一数据的接收状态包括错误接收或接收到；或者，
    所述第一设备向所述第二设备重复传输所述第一数据的次数达到第二阈值；
    所述第一设备还包括：
    第二传输单元，用于在第二时间单元集合内向所述第二设备重复传输所述系统比特，所述第二时间单元集合包括所述第M个时间单元至所述第K个时间单元。
  25. 如权利要求24所述第一设备，其特征在于，所述第二传输单元具体用于：
    在所述第二时间单元集合内向所述第二设备重复传输所述系统比特，直至所述第一设备从所述第二设备接收到针对所述系统比特的第二反馈信息；或者，
    在所述第二时间单元集合内向所述第二设备重复传输所述系统比特，直至所述第一设备向所述第二设备重复传输所述系统比特的次数达到第三阈值。
  26. 如权利要求24或25所述第一设备，其特征在于，所述第二传输单元具体用于：
    在所述第二时间单元集合中的第N个时间单元传输第二数据，所述第二数据是根据第二冗余版本和所述待传输的系统比特确定的，N为正整数。
  27. 如权利要求26所述第一设备，其特征在于，所述第二传输单元具体用于：
    在所述第二时间单元集合中的第N个时间单元至第J个时间单元重复传输所述第二数据，N<J，J为整数。
  28. 如权利要求27所述第一设备，其特征在于，重复传输所述第一数据的次数与重复传输所述第二数据的次数不同。
  29. 如权利要求26-28任一项所述第一设备，其特征在于，所述第一冗余版本与所述第二冗余版本相同，或者，所述第一冗余版本与所述第二冗余版本不同。
  30. 如权利要求20-29任一项所述第一设备，其特征在于，所述第一冗余版本为RV0。
  31. 一种第二设备，其特征在于，包括：
    接收单元，用于在第一时间单元集合内接收第一设备重复传输的第一数据，所述第一数据是根据第一冗余版本和待传输的系统比特确定的，所述第一时间单元集合包括K个时间单元，K≥3，K为整数；
    所述接收单元，还用于当满足第一条件时，在第M个时间单元停止接收所述第一数据，2≤M≤K，M为整数。
  32. 如权利要求31所述第二设备，其特征在于，还包括：
    第一发送单元，用于向所述第一设备发送配置信息，所述配置信息用于指示所述第一设备重复传输所述第一数据。
  33. 如权利要求31或32所述第二设备，其特征在于，还包括：
    确认单元，用于确认接收到所述第一数据；
    第二发送单元，用于当确认接收到所述第一数据时，向所述第一设备发送针对所述第一数据的反馈信息，所述反馈信息用于指示接收到所述第一数据。
  34. 如权利要求33所述第二设备，其特征在于，所述确认单元具体用于：
    根据所述第一数据的签名信息，确定接收到所述第一数据。
  35. 如权利要求34所述第二设备，其特征在于，所述签名信息包括解调参考信号或者前导信息。
  36. 一种第一设备，其特征在于，包括：
    第一确定单元，用于确定待传输的系统比特和第一时间单元；
    第二确定单元，用于根据所述第一时间单元，确定与所述第一时间单元对应的冗余版 本；
    第三确定单元，用于根据所述冗余版本和所述待传输的系统比特，确定第一数据；
    传输单元，用于在所述第一时间单元向所述第二设备传输所述第一数据。
  37. 如权利要求36所述第一设备，其特征在于，所述第二确定单元具体用于：
    根据所述第一时间单元的索引号，确定与所述第一时间单元对应的冗余版本。
  38. 一种第二设备，其特征在于，包括：
    接收单元，用于在第一时间单元接收第一设备传输的第一数据；
    确定单元，用于根据所述第一时间单元，确定所述第一时间单元对应的冗余版本；
    处理单元，用于根据所述冗余版本，对所述第一数据进行处理。
  39. 一种第一设备，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
    所述处理器执行所述计算机程序实现如权利要求1-11任一项所述数据传输方法的步骤。
  40. 一种第二设备，其特征在于，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
    所述处理器执行所述计算机程序实现如权利要求12-16任一项所述数据传输方法的步骤。
  41. 一种第一设备，其特征在于，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
    所述处理器执行所述计算机程序实现如权利要求17或18所述数据传输方法的步骤。
  42. 一种第二设备，其特征在于，包括存储器和处理器，以及存储在所述存储器上可供所述处理器执行的计算机程序，其特征在于：
    所述处理器执行所述计算机程序实现如权利要求19所述数据传输方法的步骤。
  43. 一种计算机可读存储介质，其特征在于，包括：所述可读存储介质上存储有指令，当所述指令在计算机上运行时，所述计算机执行权利要求1-19中任一项所述的方法。
  44. 一种包含指令的计算机程序产品，其特征在于，包括：当所述计算机程序产品在计算机上运行时，所述计算机执行权利要求1-19中任一项所述的信号传输方法。
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