WO2018082661A1 - 一种数据传输方法和装置 - Google Patents

一种数据传输方法和装置 Download PDF

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Publication number
WO2018082661A1
WO2018082661A1 PCT/CN2017/109362 CN2017109362W WO2018082661A1 WO 2018082661 A1 WO2018082661 A1 WO 2018082661A1 CN 2017109362 W CN2017109362 W CN 2017109362W WO 2018082661 A1 WO2018082661 A1 WO 2018082661A1
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Prior art keywords
group
data
groups
max
cbs
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PCT/CN2017/109362
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English (en)
French (fr)
Inventor
彭金磷
董朋朋
王宗杰
张鹏
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112019009082-7A priority Critical patent/BR112019009082A2/pt
Priority to EP17867486.7A priority patent/EP3537644B1/en
Priority to CA3042829A priority patent/CA3042829C/en
Priority to JP2019523653A priority patent/JP6938632B2/ja
Publication of WO2018082661A1 publication Critical patent/WO2018082661A1/zh
Priority to US16/402,818 priority patent/US10856286B2/en
Priority to ZA2019/02977A priority patent/ZA201902977B/en
Priority to US17/096,402 priority patent/US11533717B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0086—Unequal error protection
    • H04L1/0089—Unequal error protection in payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/0013—Rate matching, e.g. puncturing or repetition of code symbols

Definitions

  • the present application relates to the field of data processing technologies, and in particular, to a data transmission method and apparatus.
  • the data processing process of the transmitting end includes: adding a cyclic redundancy check (CRC) for a transport block (TB); dividing the TB into one or more Code blocks (CBs), and add a CRC for each CB; then send out for each CB encoding, rate matching, and resource mapping operations.
  • CRC cyclic redundancy check
  • the receiving end After receiving the data, the receiving end performs an inverse operation such as resource inverse mapping and rate matching, and then attempts to decode each CB.
  • a 1-bit (bit) acknowledgement (ACK) indication is fed back to notify the transmitting end that the TB is successfully transmitted; if a certain CB If the CRC check of the decoded data fails or the CRC check of the TB fails, a 1-bit negative acknowledgement (NACK) indication is fed back to notify the transmitting end that the TB transmission fails, and the transmitting end can retransmit the TB data. To ensure the reliability of data communication.
  • the transmitting end needs to retransmit the data of the entire TB, which may cause a problem of low transmission efficiency.
  • Embodiments of the present invention provide a data transmission method and apparatus for improving transmission efficiency.
  • a TB grouping method comprising: dividing a TB into m coding block CB groups, wherein m ⁇ 2, m is an integer, and the CB group includes at least one CB.
  • one TB is divided into multiple CB groups, and each CB group includes at least one CB group, so if the technical solution is applied to the data transmission process, the receiving end determines a CB group or a CB. If the data transmission of one or more CBs in the group fails, the transmitting end only needs to retransmit the data of the CB group, thereby saving resources and improving transmission efficiency.
  • the ACK is fed back to notify the transmitting end that the CB group successfully transmits; otherwise, the NACK is fed back to notify the transmitting end that the CB group fails to transmit.
  • the transmitting end can retransmit the data of the CB group.
  • dividing the TB into m CB groups may include: determining an actual value m of the number of CB groups according to the maximum value N Group_max of the number of CB groups.
  • N Group_max the maximum value of the number of CB groups.
  • m N Group_max .
  • a related description of this embodiment can be referred to the mode 4 of the specific embodiment section "determining the actual value m of the number of CB groups".
  • dividing the TB into m CB groups may include: determining the number of CB groups according to the data length TBS of the TB, the maximum value CB max of the data length of the CB, and the maximum value N Group_max of the number of CB groups.
  • the actual value of m A related description of this embodiment can be referred to the manner 10 of the specific embodiment section "determining the actual value m of the number of CB groups".
  • N CB_re of the number of CBs into which the TB is divided is determined.
  • TBS represents the data length of the TB. If the CRC is not added to the TB, the data length TBS of the TB refers to the data length of the TB itself. If a CRC is added for the TB, the data length TBS of the TB refers to the sum of the data length of the TB itself and the size of the CRC added for the TB.
  • CB max represents the maximum value of the data length of the CB. If the CRC is not added to the CB, the maximum CB max of the data length of the CB refers to the maximum CB size (for example, in LTE, the CB max may be 6144 bits; or, in the NR/5G, the CB max may be 8192 bits, etc.) If a CRC is added for the CB, the maximum value of the CB data length CB max refers to the maximum CB size minus the size of the CRC added for the CB. Ceil() means rounding up.
  • K may be 1, or the minimum value N CB_min of the number of CBs included in one CB group, or the number of CBs included in one CB group (or the granularity of the CB group) N CB_perGroup , or a CB group
  • the maximum value of the number of CBs included is N CB_max .
  • the N CB_min , the N CB_perGroup , and the N CB_max may both be preset or configured by signaling, where the signaling configuration may include dynamic/semi-static configuration through high layer signaling or physical layer signaling.
  • dividing the TB into m CB groups may include: determining the CB according to the data length TBS of the TB, the maximum value of the data length of the CB group, the CB group max, and the maximum value of the CB group number N Group_max .
  • the actual value m of the number of groups A related description of this embodiment can be referred to the mode 11 of the specific embodiment section "determining the actual value m of the number of CB groups".
  • TBS the relevant explanation of TBS can refer to the above.
  • the CB group max refers to the maximum number of bits of the data of the CB group itself. If a CRC is added to the CB group, the CB group max refers to the maximum number of bits of the data of the CB group itself minus the size of the CRC added for the CB group.
  • the CB group max may be configured in advance or configured by signaling, where the signaling configuration may include dynamic/semi-static configuration through high layer signaling or physical layer signaling.
  • the N Group_max involved in any of the above schemes may be pre-configured or signaled , wherein the signaling configuration may include dynamic/semi-static configuration through higher layer signaling or physical layer signaling.
  • dividing the TB into m CB groups may include: determining an actual value m of the number of CB groups according to the data length TBS of the TB.
  • one or more preset thresholds may be set in the transmitting end; then, the transmitting end may determine m according to the TBS and the one or more preset thresholds.
  • a related description of this embodiment can be referred to the mode 3 of the specific embodiment section "determining the actual value m of the number of CB groups".
  • dividing the TB into m CB groups may include: determining an actual value m of the CB group number according to the data length TBS of the TB and the maximum value CB max of the data length of the CB.
  • determining an actual value m of the CB group number may include: determining an actual value m of the CB group number according to the data length TBS of the TB and the maximum value CB max of the data length of the CB.
  • dividing the TB into m CB groups may include: determining the actual value m of the CB group number according to the data length TBS of the TB and the maximum value CB group max of the data length of the CB group.
  • a related description of this embodiment can be referred to the mode 7 of the specific embodiment section "determining the actual value m of the number of CB groups".
  • dividing the TB into m CB groups may include: determining an actual value m of the number of CB groups according to the data length TBS of the TB and the maximum value N Group_max of the number of CB groups.
  • a related description of this embodiment can be referred to the mode 8 of the specific embodiment section "determining the actual value m of the number of CB groups".
  • the embodiment of the present invention provides a plurality of implementation manners for determining the actual value m of the number of CB groups included in one TB.
  • implementation manners for determining the actual value m of the number of CB groups included in one TB refer to the manners 1 to 11 of the specific embodiment part of determining the actual value m of the number of CB groups.
  • at least two categories are as follows:
  • the first category first according to the formula
  • N CB_re of the number of CBs divided by the TB is determined; and the actual value m of the number of CB groups is determined. As in modes 1, 6 and 10.
  • the second category first according to the formula
  • N Group_re of the number of CB groups into which the TB is divided is determined; and the actual value m of the number of CB groups is determined.
  • N CB_re may not be divisible by m determined by the first type of manner, and therefore, the number of CBs in different CB groups may be different.
  • the method may further comprise: according to the formula or among them Indicates rounding up; Indicates rounding down to determine the number C of CBs in each CB group, where C includes C + and C - .
  • This implementation provides a way to determine the number of CBs in a CB group.
  • the TBS may not be divisible by the m determined by the second type, and therefore, the number of bits included in different CB groups may be different.
  • a data transmission method including: dividing a TB into m coding block CB groups, where m ⁇ 2, m is an integer, the CB group includes at least one CB; and data in the m CB groups is passed The coded modulation is mapped to the first time-frequency resource; the data mapped to the first time-frequency resource is transmitted.
  • one TB is divided into multiple CB groups, and each CB group includes at least one CB group, so that if the receiving end determines that data transmission of one or more CBs in one CB group or one CB group fails, Then, the transmitting end only needs to retransmit the data of the CB group, thereby saving resources and improving transmission efficiency.
  • the method can also include adding a CRC for each CB group.
  • the method can also include adding a CRC for each CB.
  • This possible design provides a CB group method for dividing CB.
  • the method may further include: receiving an M-bit HARQ indication, where the HARQ indication per bit is used to indicate whether data in the corresponding CB group is correctly received, and M is a maximum value of the CB group number. Or the actual value m of the number of CB groups.
  • the transmitting end when multiple TBs are transmitted in a single transmission, the transmitting end can independently operate on each of the multiple TBs, that is, the multiple TBs. Each TB in the data transmission is performed according to the technical solution provided by the present application.
  • the transmitting end can also perform joint operations on the multiple TBs. For example, a unified grouping manner can be determined according to the TB with the largest or smallest data length among the multiple TBs. For example, TBS or the like in the process of determining the actual value m of the number of CB groups may be determined based on the TB having the largest or smallest data length among the plurality of TBs.
  • This possible design provides an implementation of multiple TB packets that are transmitted simultaneously.
  • the method may further include: transmitting control information, wherein the control information comprises at least one of the following information: 1 or N copies of the modulation and coding mode MCS, 1 or N pieces of new transmission data Indicates NDI, 1 or N copies of the redundancy version RV; where N represents the maximum value of the number of CB groups or the actual value m of the number of CB groups.
  • the control information may be downlink control information DCI.
  • the technical solution provides a method of transmitting downlink control information DCI.
  • the transmission process only transmits retransmitted data
  • the information indicating the newly transmitted data in the NDI is meaningless. If the current transmission process transmits new data and retransmits data, the information indicating the newly transmitted data and the retransmitted data in the NDI is meaningful.
  • a third aspect provides a data transmission method, including: receiving control information; wherein the control information includes information of a transport block TB, the TB includes m coding block CB groups, and the CB group includes at least one CB, m ⁇ 2, m Is an integer. Then, m CB groups are obtained from the first time-frequency resource, and the data of the m CB groups are demodulated and decoded, and then cascading to generate one TB of data.
  • the method may further comprise determining an actual value m of the number of CB groups.
  • the method may further include: feeding back an M-bit automatic repeat request HARQ indication, where the HARQ indication per bit is used to indicate whether data in the corresponding CB group is correctly received, and M is a CB group.
  • M is a CB group.
  • the MACK NACK indication is fed back.
  • the method further includes: receiving control information; the control information includes at least one of the following information: 1 or N copies of the modulation and coding mode MCS, 1 or N pieces of new data indication NDI, 1 or N copies of the redundancy version RV; where N represents the maximum value of the number of CB groups or the actual value m of the number of CB groups.
  • a TB grouping apparatus for performing any of the TB grouping methods provided by the above first aspect.
  • the TB grouping apparatus includes: a dividing module, configured to divide the TB into m coding block CB groups, where m ⁇ 2, m is an integer, and the CB group includes at least one CB.
  • the dividing module is specifically configured to: determine the actual value m of the number of CB groups according to the maximum value N Group_max of the number of CB groups.
  • N Group_max the maximum value of the number of CB groups.
  • the dividing module is specifically configured to determine the actual value m of the number of CB groups according to the data length TBS of the TB, the maximum value CB max of the data length of the CB, and the maximum value N Group_max of the number of CB groups.
  • the dividing module is specifically configured to determine the actual value of the number of CB groups according to the data length TBS of the TB, the maximum value of the data length of the CB group, the CB group max, and the maximum value of the CB group number N Group_max . .
  • the dividing module is specifically configured to: determine the actual value m of the number of CB groups according to the data length TBS of the TB.
  • the dividing module is specifically configured to: determine the actual value m of the number of CB groups according to the data length TBS of the TB and the maximum value CB max of the data length of the CB.
  • the dividing module is specifically configured to: determine the actual value m of the number of CB groups according to the data length TBS of the TB and the maximum value CB group max of the data length of the CB group.
  • the dividing module is specifically configured to: determine the actual value m of the number of CB groups according to the data length TBS of the TB and the maximum value N Group_max of the number of CB groups.
  • the partitioning module can also be used: according to the formula or among them Indicates rounding up; Indicates rounding down to determine the number C of CBs in each CB group.
  • a data transmission apparatus for performing any of the data transmission methods provided by the second aspect.
  • the data transmission apparatus may include: a division module, a mapping module, and a sending module.
  • the dividing module is configured to divide the transport block TB into m coding block CB groups, where m ⁇ 2, m is an integer, and the CB group includes at least one CB.
  • the mapping module is configured to map the data in the m CB groups to the first time-frequency resource after being code-modulated.
  • a sending module configured to send data mapped to the first time-frequency resource.
  • the apparatus may further include: an adding module for adding a CRC for each CB group. And/or, used to add a CRC for each CB.
  • the apparatus may further include: a receiving module, configured to receive an M-bit automatic repeat request HARQ indication, where the HARQ indication per bit is used to indicate whether data in the corresponding CB group is correctly received.
  • M represents the maximum value of the number of CB groups or the actual value m of the number of CB groups.
  • the sending module may be further configured to: send control information, where the control information includes at least one of the following information: 1 or N copies of the modulation and coding mode MCS, 1 or N new transmissions
  • the data indicates NDI, 1 or N copies of the redundancy version RV; wherein N represents the maximum value of the number of CB groups or the actual value m of the number of CB groups.
  • the control information may be downlink control information DCI.
  • the transmission process only transmits retransmitted data
  • the information indicating the newly transmitted data in the NDI is meaningless. If the current transmission process transmits new data and retransmits data, the information indicating the newly transmitted data and the retransmitted data in the NDI is meaningful.
  • a data transmission apparatus for performing any of the data transmission methods provided by the above third aspect.
  • the data transmission device can include: a receiving module and an obtaining module.
  • the receiving module is configured to receive control information; the control information includes information of the transport block TB, the TB includes m coding block CB groups, and the CB group includes at least one CB, m ⁇ 2, and m is an integer.
  • the acquiring module is configured to obtain m CB groups from the first time-frequency resource, and demodulate and decode the data of the m CB groups to generate a TB data by cascading.
  • the apparatus may further comprise: a determining module for determining an actual value m of the number of CB groups.
  • a determining module for determining an actual value m of the number of CB groups.
  • the information of the TB may further include at least one of the following information: 1 or N modulation and coding methods MCS, 1 or N new transmission data indicating NDI, 1 or N redundancy The remaining version RV; wherein N represents the maximum value of the number of CB groups or the actual value m of the number of CB groups.
  • the apparatus may further include: a sending module, configured to feed back an M-bit automatic repeat request HARQ indication, where the HARQ indication per bit is used to indicate whether data in the corresponding CB group is correctly received.
  • M is the maximum value of the number of CB groups or the actual value m of the number of CB groups.
  • the NACK indication of the M bit is fed back.
  • M is the maximum value of the CB group
  • only the first m bits are valid, or only the first m bits are used to indicate whether the data in the corresponding CB group is correctly received.
  • the specific implementation is not limited to this.
  • CRC cyclic redundancy check
  • C ceil(B/(CB
  • the data mapped on the first time-frequency resource includes at least one of new transmission data and retransmission data, where the new transmission data includes the foregoing.
  • a TB grouping apparatus which may be a transmitting end or a receiving end, and the apparatus may implement the functions performed in the TB grouping method example provided by the above first aspect, and the function may be implemented by hardware. Implementation, you can also implement the corresponding software implementation through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the apparatus includes a processor, a memory, a system bus, and a communication interface; the processor is configured to support the apparatus to perform the corresponding functions of the methods provided by the first aspect above.
  • the communication interface is used to support communication between the device and other network elements.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • the communication interface may specifically be a transceiver.
  • a data transmission apparatus which may be a transmitting end, and the apparatus may implement the functions performed in the example of the data transmission method provided by the foregoing second aspect, and the functions may be implemented by hardware or by hardware. Perform the appropriate software implementation.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the apparatus includes a processor, a memory, a system bus, and a communication interface; the processor is configured to support the apparatus to perform the corresponding functions of the methods provided by the second aspect above.
  • the communication interface is used to support communication between the device and other network elements, such as the receiving end.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • the communication interface may specifically be a transceiver.
  • a data transmission device which may be a receiving end, and the device may implement the above
  • the function performed in the example of the data transmission method provided by the third aspect, the function may be implemented by hardware, or may be implemented by hardware corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the apparatus includes a processor, a memory, a system bus, and a communication interface; the processor is configured to support the apparatus to perform the corresponding functions of the methods provided by the third aspect above.
  • the communication interface is used to support communication between the device and other network elements, such as the receiving end.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • the communication interface may specifically be a transceiver.
  • a computer storage medium for storing computer software instructions corresponding to the TB grouping method provided by the first aspect, which includes a program designed to execute the seventh aspect.
  • a computer storage medium for storing computer software instructions corresponding to the data transmission method provided by the second aspect, which comprises a program designed to execute the above eighth aspect.
  • a computer storage medium for storing computer software instructions corresponding to the data transmission method provided by the third aspect, which comprises a program designed to execute the above ninth aspect.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform any of the TB grouping methods provided by the first aspect.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform any of the data transfer methods provided by the second aspect.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform any of the data transmission methods provided by the third aspect.
  • any of the data transmission devices or computer storage media or computer program sheets provided above are used to perform the corresponding methods provided above, and therefore, the beneficial effects that can be achieved can be referred to the above.
  • the beneficial effects in the corresponding methods are not described here.
  • the process of resource mapping includes: mapping each CB after the encoding and rate matching operations to the time-frequency resources according to the rules of the pre-frequency domain and the time domain.
  • the interference may affect the accuracy of data of multiple CB groups, and thus the data of the multiple CB groups may need to be retransmitted, thereby reducing transmission efficiency.
  • a data transmission method comprising: dividing a TB into m CB groups, wherein m ⁇ 2, m is an integer, and each CB group of the m CB groups includes at least one CB. Then, the data in the m CB groups is code-modulated and mapped onto the first time-frequency resource, and then the data mapped to the first time-frequency resource is transmitted.
  • the first time-frequency resource includes n CB container units CCU, and the CCU is part of the time-frequency resource in the first time-frequency resource, and there is no overlapping time-frequency resource between different CCUs; data in different CB groups is mapped to different On the CCU; wherein the data of different CB groups overlap in the frequency domain and do not overlap in the time domain, or the data of different CB groups overlap in the time domain and do not overlap in the frequency domain; n ⁇ m, n is an integer.
  • the time-frequency resource (ie, the first time-frequency resource) allocated by the current transmission may be divided into multiple CCUs according to a certain rule, and then one TB of the current transmission is divided into multiple CB groups;
  • the data of the plurality of CB groups is coded and modulated and mapped to the corresponding CCU, so that data in different CB groups does not overlap in the time domain or does not overlap in the frequency domain.
  • the interference only affects the accuracy of the data of one CB group. Therefore, it is only necessary to retransmit the data of the CB group, which improves the transmission efficiency compared with the prior art.
  • the group of the CB group affected by the interference is compared with the prior art. The number is small, so fewer CB groups need to be retransmitted, which improves transmission efficiency.
  • a data transmission apparatus comprising: a partitioning module, a mapping module, and a transmitting module.
  • the dividing module is configured to divide the transport block TB into m coding block CB groups, where m ⁇ 2, m is an integer, and each CB group in the m CB groups includes at least one CB.
  • a mapping module configured to map the data in the m CB groups to the first time-frequency resource, where the first time-frequency resource includes n CB container units CCU, and the CCU is in the first time-frequency resource.
  • the sending module is configured to send data mapped to the first time-frequency resource.
  • the dividing the TB into the m CB groups in the foregoing first aspect may include: a data length according to the TB, a maximum value of the data length of the CB, a maximum value of the data length of the CB group, and a CB.
  • the actual value m of the number of CB groups is determined by at least one of the maximum number of groups and the number n of CCUs.
  • the foregoing steps in the possible design may include: determining a reference value of the number of CB groups according to the data length of the TB and the maximum value of the data length of the CB; and then, referencing the CB group number, the CB group number
  • the minimum value of the maximum value and the number of CCUs n is the actual value m of the number of CB groups.
  • the dividing module in the foregoing second aspect may be specifically configured to: according to the data length of the TB, the maximum value of the data length of the CB, the maximum value of the data length of the CB group, the maximum value of the CB group number, and the number of CCUs. At least one of n determines the actual value m of the number of CB groups.
  • the dividing module may be specifically configured to: determine a reference value of the number of CB groups according to a data length of the TB and a maximum length of the data length of the CB; and then, a reference value of the number of CB groups, a maximum value of the number of CB groups, and The minimum value of the number n of CCUs is taken as the actual value m of the number of CB groups.
  • the transmitting end needs to determine the data length of the TB that can be transmitted this time before the data is transmitted.
  • the specific determination manner is not limited herein.
  • the maximum value of the data length of the CB and the maximum value of the number of CB groups may be preset.
  • the method provided by the foregoing first aspect may further include: according to the actual value m of the number of CB groups and the number n of CCUs, Determining a mapping relationship between each CB group of the m CB groups and each of the C CCUs; and then determining m CB groups according to the mapping relationship and the size of resources available for transmitting data in the n CCUs The data length of each CB group in .
  • determining the data length of each CB group in the m CB groups according to the mapping relationship and the size of resources available for transmitting data in the N CCUs may include: determining, in the m CB groups, according to the following formula 1 Data length of the i-th CB group:
  • B i represents the data length of the i-th CB group in the m CB groups, 1 ⁇ i ⁇ m, i is an integer;
  • L TB represents the data length of the TB, and
  • L TB_CRC represents the cyclic redundancy check added for the TB
  • S CB_i indicates the size of resources available for transmitting data in the CCU corresponding to the i-th CB group, and S total indicates the size of resources available for transmitting data in n CCUs , floor() indicates Round down.
  • the apparatus provided in the above second aspect may further comprise a determining module.
  • the determining module is configured to: determine, according to an actual value m of the number of CB groups and a number n of CCUs, a mapping relationship between each CB group in the m CB groups and each CCU in the n CCUs; The relationship and the size of the resources available for transmitting data in the n CCUs determine the data length of each of the c CB groups.
  • the determining module is specifically configured to determine, according to the foregoing formula 1, the data length of the i-th CB group in the m CB groups.
  • the possible design method can ensure that the data in the m CB groups are distributed as evenly as possible on the n CCUs, so that the code rates of each CB group after encoding and rate matching are basically the same, which is convenient for the AMC to work normally.
  • the method provided by the above first aspect may further include: dividing data in each CB group into C CBs.
  • the dividing module in the foregoing second aspect may also be used to: divide data in each CB group into C CBs.
  • B represents the data length of the CB group
  • CB max represents the maximum value of the data length of the CB
  • CB CRC represents the size of the CRC added for the CB.
  • the TB information includes the data length of the TB.
  • a data transmission method including: receiving control information, where the control information includes information of a transport block TB; receiving a TB mapped to a first time-frequency resource; wherein, the first time-frequency resource includes n CCU container unit CCU, CCU is part of the time-frequency resource in the first time-frequency resource, there is no overlapping time-frequency resource between different CCUs; TB includes m coding block CB group, each CB group of m CB groups Including at least one CB; data of different CB groups overlap in the frequency domain and do not overlap in the time domain, or data of different CB groups overlap in the time domain and do not overlap in the frequency domain; m ⁇ 2,m An integer, n ⁇ m, n is an integer; determining a mapping relationship between each CB group in the m CB groups and each CCU in the n CCUs; obtaining m pieces from the first time-frequency resource according to the mapping relationship In the CB group, the data of the m CB
  • a data transmission apparatus including: a receiving module, configured to receive control information, where the control information includes information of a transport block TB; and receiving a TB mapped to the first time-frequency resource;
  • the first time-frequency resource includes n CB container units CCU, the CCU is part of the time-frequency resource in the first time-frequency resource, and there is no overlapping time-frequency resource between different CCUs;
  • the TB includes m coding blocks CB group, m CBs Each CB group in the group includes at least one CB, and data in different CB groups are mapped to different CCUs; data of different CB groups overlap in the frequency domain and do not overlap in the time domain, or different CB groups The data overlaps in the time domain and does not overlap in the frequency domain; m ⁇ 2, m is an integer, n ⁇ m, and n is an integer.
  • Determining module for determining A mapping relationship between each of the c CB groups and each of the n CCUs.
  • the obtaining module is configured to obtain m CB groups from the first time-frequency resource according to the mapping relationship, and demodulate and decode the data of the m CB groups to generate one TB of data.
  • the method provided by the foregoing third aspect may further include: according to the data length of the TB, the maximum value of the data length of the CB, and the data length of the CB group.
  • the actual value m of the number of CB groups is determined by at least one of the maximum value, the maximum value of the number of CB groups, and the number n of CCUs.
  • the reference value of the number of CB groups is determined according to the data length of the TB and the maximum data length of the CB; the reference value of the CB group number, the maximum value of the CB group number, and the minimum value of the number of CCUs n , as the actual value m of the number of CB groups.
  • the determining module in the foregoing fourth aspect may be further configured to: according to the data length of the TB, the maximum value of the data length of the CB, the maximum value of the data length of the CB group, the maximum value of the CB group number, and the number of CCUs. At least one of n determines the actual value m of the number of CB groups.
  • the determining module may be specifically configured to: determine a reference value of the number of CB groups according to a data length of the TB and a maximum length of the data length of the CB; a reference value of the number of CB groups, a maximum value of the CB group number, and a CCU
  • the minimum value of the number n is the actual value m of the number of CB groups.
  • determining a mapping relationship between each CB group and each CCU in the n CCUs in the foregoing third aspect may include: actual values according to the number of CB groups The number n of m and CCUs determines the mapping relationship between each CB group in the m CB groups and each CCU in the n CCUs.
  • the determining module in the foregoing fourth aspect may be specifically configured to: determine each of the C C groups and the n CCUs according to the actual value m of the CB group number and the number n of the CCUs. The mapping relationship between CCUs.
  • the method provided by the above third aspect further The method may include: determining a data length of each of the c CB groups according to a mapping relationship and a size of a resource available for transmitting data in the n CCUs.
  • the data length of each of the c CB groups is determined according to Equation 1 above.
  • the determining module in the foregoing fourth aspect may be further configured to: determine, according to the mapping relationship and the size of resources available for transmitting data in the n CCUs, the data length of each CB group in the m CB groups.
  • the determining module is specifically configured to: determine, according to Equation 1 above, a data length of each CB group in the m CB groups.
  • the method provided by the foregoing third aspect may further include: The data is divided into C CBs.
  • the apparatus provided in the foregoing fourth aspect may further include: a dividing module, configured to: divide data in each CB group into C CBs. Among them, for how to determine the value of C can refer to the above.
  • the data mapped on the first time-frequency resource includes at least one of new transmission data and retransmission data, where the new transmission data includes the foregoing.
  • a data transmission device which may be a transmitting end, and the device may implement the above
  • the function performed in the example of the data transmission method provided by the first aspect the function may be implemented by hardware, or may be implemented by hardware corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the apparatus includes a processor, a memory, a system bus, and a communication interface; the processor is configured to support the apparatus to perform the corresponding functions of the methods provided by the first aspect above.
  • the communication interface is used to support communication between the device and other network elements, such as the receiving end.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • the communication interface may specifically be a transceiver.
  • a computer storage medium for storing computer software instructions corresponding to the data transmission method provided by the above first aspect, which includes a program designed to execute the fifth aspect.
  • a data transmission apparatus which may be a receiving end, and the apparatus may implement the functions performed in the example of the data transmission method provided by the foregoing third aspect, and the functions may be implemented by hardware or by hardware. Perform the appropriate software implementation.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the apparatus includes a processor, a memory, a system bus, and a communication interface; the processor is configured to support the apparatus to perform the corresponding functions of the methods provided by the third aspect above.
  • the communication interface is used to support communication between the device and other network elements, such as the transmitting end.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • the communication interface may specifically be a transceiver.
  • a computer storage medium for storing computer software instructions corresponding to the data transmission method provided by the third aspect, which includes a program designed to execute the sixth aspect.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform any of the data transmission methods provided by the first aspect.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform any of the data transmission methods provided by the third aspect.
  • FIG. 1 is a schematic diagram of a resource mapping provided by the prior art
  • FIG. 2 is a schematic diagram of an interference scenario provided based on FIG. 1;
  • FIG. 3 is a schematic diagram of another interference scenario provided based on FIG. 1;
  • FIG. 4 is a schematic diagram of dividing a first time-frequency resource according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another method for dividing a first time-frequency resource according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of another method for dividing a first time-frequency resource according to an embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart diagram of a data transmission method according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic flowchart of another data transmission method according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of a transmission process according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of another transmission process according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of interaction of a data transmission method according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention.
  • FIG. 1 it is a schematic diagram of a resource mapping.
  • the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
  • the time domain resource allocated in the current transmission process is shown in the time domain, specifically, one slot, the slot includes 7 symbols, that is, symbols 0 to 6; the transmission is shown in the frequency domain.
  • the TB transmitted during the transmission includes six CBs, that is, CB1 to CB6, as an example. It is assumed that CB1 to CB3 constitute CB group 1, and CB4 to CB6 constitute CB group 2; then, based on the resource mapping method shown in Fig. 1, the transmission efficiency is lowered in the scenarios shown in the following schemes 1 and 2. specific:
  • a plurality of CB groups of data may be mapped on one symbol.
  • the interference may affect data of multiple CB groups mapped on the symbol. Accuracy, so the data of the multiple CB groups may need to be retransmitted, thereby reducing the transmission efficiency.
  • the time-frequency resource where the interference is located is as shown by the dotted line frame 1 in FIG. 2, that is, the symbol 3 is interfered
  • the interference affects the accuracy of the data of CB3 and CB4, that is, affects the CB group 1 and The accuracy of the data of CB group 2, therefore, the data of CB group 1 and CB group 2 may all need to be retransmitted, thereby reducing the transmission efficiency.
  • Solution 2 Data of all CB groups may be mapped on a narrow bandwidth.
  • the interference may affect the accuracy of data of all CB groups, so All CB group data may need to be retransmitted, which reduces transmission efficiency.
  • the time-frequency resource where the interference is located is as shown by the dotted line box 2 in FIG. 2, that is, the narrow bandwidth allocated during the current transmission is interfered
  • the interference may affect the accuracy of the data of CB1 to CB6. That is, the accuracy of the data of CB group 1 and CB group 2 is affected, so the data of CB group 1 and CB group 2 may both need to be retransmitted, thereby reducing the transmission efficiency.
  • an embodiment of the present invention provides a data transmission method and apparatus.
  • the basic principle is that the time-frequency resources allocated by the current transmission are divided into multiple CCUs by a certain rule, and then one TB of the current transmission is divided into multiple CB groups; then, the data of the multiple CB groups is divided. After coded modulation, it is mapped to the corresponding CCU, so that the data in different CB groups do not overlap in the time domain or overlap in the frequency domain. In this way, if the data in different CB groups does not overlap in the time domain, when the data transmitted this time is interfered by the frame shown by the dotted line in FIG. 2 during the transmission, the interference only affects one.
  • the accuracy of the data of the CB group therefore, only the data of the CB group needs to be retransmitted, and the transmission efficiency is improved as compared with the prior art. If the data in different CB groups does not overlap in the frequency domain, when the data transmitted this time is interfered by the signal shown by the broken line frame 2 in FIG. 2 during the transmission, the interference station is compared with the prior art. The number of groups affected by the CB group is small, so there are fewer CB groups that need to be retransmitted, which improves the transmission efficiency.
  • the technical solution provided by the embodiment of the present invention can be applied to the system architecture shown in FIG. 2, and the system architecture shown in FIG. 2 includes: a transmitting end and a receiving end.
  • the transmitting end and the receiving end may both include but are not limited to: a base station, a user equipment, and the like.
  • the technical solutions provided by the embodiments of the present invention can be applied to various communication systems, such as a current 4G communication system, and a future evolution network, such as a 5G communication system.
  • a long term evolution (LTE) system LTE
  • 3GPP 3rd generation partnership project
  • the application scenarios in the 5G standard may include, but are not limited to, a communication scenario between the user equipment and the user equipment, a communication scenario between the base station and the base station, and a communication scenario between the base station and the user equipment.
  • the technical solution provided by the embodiment of the present invention can also be applied to a scenario between a user equipment and a user equipment in a 5G communication system, or a communication between a base station and a base station.
  • the first time-frequency resource refers to the time-frequency resource allocated by the current transmission process.
  • the embodiment of the present invention does not limit the size of the time-frequency resource allocated for each transmission process and how to determine the size of the time-frequency resource allocated for each transmission process.
  • the size of the time-frequency resources allocated by any two transmission processes may be equal or unequal.
  • the time domain resource allocated in one transmission process may be a transmission time interval (TTI) in an LTE system, or a short TTI in a symbol level, or a short TTI in a large subcarrier interval in a high frequency system. It can be a slot or a mini-slot in a 5G system. This embodiment of the present invention does not limit this.
  • the CCU, the CB container unit, is part of the time domain resource used in a single transfer process.
  • the embodiment of the present invention does not limit the size of the CCU. There are no overlapping time-frequency resources between different CCUs. The sizes of different CCUs may or may not be equal.
  • the embodiment of the present invention does not limit the manner in which the CCU is configured to divide the time-frequency resources allocated in one transmission process into multiple CCUs.
  • the CCU may be dynamically configured, semi-statically configured, or statically configured.
  • the CCU can be configured according to the scheduling characteristics of the currently scheduled service. For example, in scheduling an enhanced mobile broadband (eMBB) service, if an ultra-reliable and low-Latency communications (URLLC) service needs to be scheduled, the scheduling characteristics of the URLLC service may be used. , to configure the CCU.
  • the scheduling feature of the URLLC service may include: the size and location of the time-frequency resource allocated when the URLLC service is scheduled.
  • the first time-frequency resource is divided into multiple CCUs.
  • the time domain resource may be divided by any time domain resource granularity, for example, the time domain resource is divided by the integer multiple of the symbol.
  • the time domain resource of the first time-frequency resource is a slot
  • the time domain resource may be divided into mini-slots or symbols, so as to divide the first time-frequency resource into multiple CCUs.
  • FIG. 4 it is a schematic diagram of dividing a first time-frequency resource.
  • the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
  • 4 is an example in which one slot is 7 symbols, and the slot is divided into four parts. In this case, the first three parts can be composed of two symbols, and the last one part is composed of one. Symbol composition.
  • the time domain resource of the first time-frequency resource is a plurality of slots
  • the time domain resource may be divided into a granularity by using a slot, a mini-slot, or a symbol to implement the first time-frequency resource into multiple CCUs.
  • the first time-frequency resource is divided into multiple CCUs by dividing the frequency domain resources.
  • the frequency domain resources are divided into any frequency domain resource granularity, for example, an integer multiple of a resource element (RE) or an integer multiple of a resource block (RB), and the frequency domain resources or discrete are continuously divided.
  • Divide frequency domain resources may include continuously and uniformly dividing the frequency domain resources.
  • the discrete divided frequency domain resources may include discrete uniform frequency domain resources or equally spaced frequency domain resources. It should be noted that the discrete frequency domain resources may be obtained after the data is coded and modulated and then mapped to the time-frequency resource, and the frequency domain diversity gain may be obtained.
  • plural refers to two or more.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character “/” in this article generally indicates that the contextual object is an “or” relationship; in the formula, the character “/” indicates that the contextual object is a "divide” relationship.
  • FIG. 5 it is a schematic diagram of dividing a first time-frequency resource.
  • the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
  • FIG. 5 illustrates that the frequency domain resource of the first time-frequency resource is 8 RBs, and the frequency domain resource is divided into two parts.
  • each part may be composed of 4 RBs.
  • 4 RBs of each part may be continuous, as shown in (a) of FIG. 5; or may be discrete, as shown in (b) of FIG.
  • Manner 3 The first time-frequency resource is divided into multiple CCUs by dividing the time domain resource and the frequency domain resource.
  • Mode 3 is a combination of Mode 1 and Mode 2, and the related description can be referred to above.
  • FIG. 6 it is a schematic diagram of dividing a first time-frequency resource.
  • the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
  • Fig. 6 is drawn based on (a) and Fig. 4 in Fig. 5.
  • the time-frequency resources of each shaded portion in Fig. 6 represent one CCU.
  • the symbol in the slot is a symbol defined in the frame structure.
  • a slot may contain 7 symbols or 14 symbols.
  • the symbol in the slot is the symbol used to carry the data in the slot.
  • the symbols in the slot are not completely symbols (ie, data symbols) for carrying data.
  • one or more symbols starting from the slot are symbols for carrying downlink control information (ie, control).
  • Symbol) the ending one or more symbols are symbols (ie, control symbols) for carrying uplink control information, and there is a symbol (FIG. GP) for transmitting a guard interval (GP) required for downlink switching uplink.
  • Symbol symbols (ie, reference symbols) used to transmit reference information, and the like.
  • the symbol of the slot shown in the drawings of the present specification refers to the data symbol in the slot, that is, the symbol after the non-data symbol such as the control symbol, the GP symbol, and the reference symbol in the slot.
  • the foregoing rules for configuring the CCU may be pre-agreed by the transmitting end and the receiving end, or may be indicated by the transmitting end to the receiving end by signaling.
  • FIG. 7 is a schematic flowchart diagram of a data transmission method according to an embodiment of the present invention.
  • the method shown in FIG. 7 may include the following steps S101 to S103:
  • the transmitting end divides the TB into m CB groups, where m ⁇ 2, m is an integer, and each CB group in the m CB groups includes at least one CB.
  • the transmitting end divides the TB into m CB groups; if the CRC is added for the TB, the transmitting end divides the TB and the CRC added for the TB into m CB groups as a whole.
  • the new transmission data may be transmitted during the transmission, and the new transmission data and the retransmission data may be transmitted, and the new transmission data includes the TB. It is also possible to transmit only retransmitted data during another transmission. A description of the retransmission data can be found below.
  • the method may further include: the transmitting end determines the size of the TB, and then acquires the data of the TB. If only the newly transmitted data is transmitted during the transmission, the transmitting end may determine the TB that can be transmitted according to the size of the time-frequency resource allocated by the current transmission process (ie, the first time-frequency resource in the following). If the new transmission data and the retransmission data are transmitted during the transmission, the transmitting end may use the time-frequency resource allocated in the current transmission process (ie, the first time-frequency resource in the following) to transmit the new transmission.
  • the size of the time-frequency resource of the data determines the size of the TB that can be transmitted this time.
  • the time-frequency resource that can be used to transmit the newly transmitted data may be the difference between the time-frequency resource allocated by the current transmission process and the time-frequency resource occupied by the retransmitted data.
  • the CB group in the embodiment of the present invention may also be referred to as a small TB or a sub TB (ie, a Sub-TB) or the like.
  • the transmitting end may also divide the TB into one CB group.
  • the CB group has the same meaning as the TB.
  • the transmitting end performs coding and modulation on the data in the m CB groups to be mapped to the first time-frequency resource, where the first time-frequency resource includes n CCUs, and the CCU is part of the time-frequency resources in the first time-frequency resource.
  • the first time-frequency resource includes n CCUs
  • the CCU is part of the time-frequency resources in the first time-frequency resource.
  • the data overlaps in the time domain and does not overlap in the frequency domain; n ⁇ m, n is an integer.
  • the first time-frequency resource is the time-frequency resource allocated by the current transmission process, and the data mapped on the first time-frequency resource is the data transmitted during the transmission process.
  • the data in the m CB groups are all mapped to the n CCUs.
  • the first time-frequency resource may only include the n CCUs. If the new transmission data and the retransmission data are transmitted during the current transmission, the first time-frequency resource may include the time-frequency resources occupied by the retransmission data in addition to the n CCUs.
  • the CCU configuration mode of the retransmission data transmitted in the current transmission process may be the same as or different from the CCU configuration mode of the new transmission data transmitted in the current transmission process. For details, refer to the following.
  • Data in one CB group can be mapped to one or more CCUs, and data in different CB groups is mapped to different CCUs.
  • Case 3 Different CCUs do not overlap in the time domain and the frequency domain. CCU1, CCU6, etc. as shown in FIG.
  • any two CCUs in the N CCUs satisfies the above case 1, that is, any two CCUs in the N CCUs overlap in the frequency domain and do not overlap in the time domain, because different CB groups Data in It is mapped to different CCUs, so it can be realized that data of different CB groups overlap in the frequency domain and do not overlap in the time domain.
  • Example 1 assuming that one TB is divided into two CB groups, that is, CB group 1 and CB group 2, then based on the configuration manner of the CCU shown in FIG. 4, the data in each CB group can be mapped to two. On the CCU, for example, CB group 1 is mapped to CCU1 and CCU2, and CB group 2 is mapped to CCU3 and CCU4.
  • any two CCUs in the N CCUs satisfies the above case 2, that is, any two CCUs in the n CCUs are satisfied to overlap in the time domain and do not overlap in the frequency domain, because different CBs
  • the data in the group is mapped to different CCUs, so it can be realized that the data of different CB groups overlap in the time domain and do not overlap in the frequency domain.
  • Example 2 assuming that one TB is divided into two CB groups, that is, CB group 1 and CB group 2, then based on the configuration manner of the CCU shown in FIG. 5, the data in each CB group can be mapped to one. On the CCU, for example, CB Group 1 is mapped onto CCU1 and CB Group 2 is mapped onto CCU2.
  • the relationship between the different CCUs in the two CCUs satisfies the above case 1
  • the relationship between the different CCUs satisfies the above case 2
  • the relationship between the different CCUs is also satisfied to satisfy the above case 3, as shown in FIG. 6.
  • the data of different CB groups overlap in the frequency domain and there is no overlap in the time domain. For example, assuming that one TB is divided into two CB groups, that is, CB group 1 and CB group 2, then based on the configuration manner of the CCU shown in FIG. 6, the data in the CB group 1 can be mapped to CCU1, CCU2.
  • the data in CB group 2 can be mapped to CCU3, CCU4, CCU7 and CCU8; alternatively, the data in CB group 1 can be mapped to CCU1, CCU3, CCU5 and CCU7, in CB group 2 Data can be mapped to CCU2, CCU4, CCU6, and CCU8. It can also be realized that different CB groups overlap in the time domain and do not overlap in the frequency domain. For example, assuming that one TB is divided into two CB groups, that is, CB group 1 and CB group 2, then based on the configuration manner of the CCU shown in FIG. 6, the data in the CB group 1 can be mapped to CCU1 to CCU4. The data in CB group 2 can be mapped to CCU5 to CCU8.
  • the multiple CBs included in each CB group may be interleaved and mapped.
  • the interlace mapping may be a frequency domain interleaving mapping to ensure that each CB after interleaving occupies a comparable frequency domain bandwidth with each CB before interleaving, thereby ensuring frequency domain diversity.
  • the interlace mapping may also be a time domain interleaving mapping to ensure that data in each CCU is distributed as much as possible on all symbols of the CCU in the time domain.
  • the transmitting end can transmit data a 1,1 , a 1,2 ,...a 1,l1 ;a 2,1 , a 2,2 ,...a 1,l2 ;..
  • the transmitting end may firstly data a 1,1 , a 1,2 ,...a 1,l1 ;a 2,1 , a 2,2 ,...a 1,l2 ;..
  • S103 The transmitting end sends data mapped to the first time-frequency resource.
  • the method may further include: adding, by the transmitting end, a CRC for each CB group, so that the receiving end verifies whether the data of the CB group is successfully received.
  • the method may further include: the transmitting end is each CB component as one or more CBs. Further, the method may further include: adding, by the transmitting end, a CRC for each CB, so that the receiving end verifies whether the data of the CB is successfully received. Each CB will be on the transmitting end.
  • the S102 may include: encoding, rate matching, scrambling, modulating, layer mapping, and antenna mapping operations for each CB.
  • S103 may include: mapping data after operations such as encoding, rate matching, scrambling, modulation, layer mapping, and antenna mapping onto the first time-frequency resource.
  • the data transmission method provided by the embodiment of the present invention divides the TB into m CB groups, and maps the m CB groups to n CCUs in the first time-frequency resource; and then maps to the first time-frequency resource.
  • the data on it is sent out.
  • the number of retransmitted CB groups can be reduced, thereby improving transmission efficiency.
  • the data in different CB groups does not overlap in the frequency domain, such as the two CB groups in the above example 2, when the narrowband in the frequency domain resources allocated by this transmission is interfered, it will not affect all CB groups.
  • the accuracy of the data compared with the prior art, the number of retransmitted CB groups can be reduced, thereby improving the transmission efficiency. For example, compared with the above scheme 2, only the CB group 1 needs to be retransmitted, thereby reducing the weight. The number of CB groups transmitted, thereby improving transmission efficiency.
  • mapping manner of the CB grouping mode of the CCU according to the embodiment of the present invention on the time-frequency resource can also make the downlink control information (DCI) design more concise and the design of the retransmission data. More flexible (for example, it is possible to transmit only retransmitted data in one transmission, or transmit new and retransmitted data). For details, please refer to the following.
  • DCI downlink control information
  • the maximum number of CB groups can be set in the transmitting end. N Group_max .
  • the S102 may include: the transmitting end according to at least one of a data length of the TB, a maximum value of the data length of the CB, a maximum value of the data length of the CB group, a maximum value of the CB group number, and a number n of CCUs. Determine the actual value m of the number of CB groups.
  • a data length of the TB a maximum value of the data length of the CB
  • a maximum value of the data length of the CB group a maximum value of the CB group number
  • a number n of CCUs Determine the actual value m of the number of CB groups.
  • the transmitting end determines the actual value m of the number of CB groups according to the data length TBS of the TB, the maximum value CB max of the data length of the CB, the maximum value N Group_max of the number of CB groups, and the number n of CCUs .
  • CB max and N Group_max can be preset.
  • the mode 1 may include the following steps S11 to S12:
  • the transmitting end determines the reference value N Group_re of the number of CB groups according to the data length TBS of the TB and the maximum value CB max of the data length of the CB.
  • the data length TBS of the TB refers to the data length of the TB itself. If a CRC is added for the TB, the data length TBS of the TB refers to the sum of the data length of the TB itself and the size of the CRC added for the TB.
  • the maximum value of the CB data length CB max refers to the maximum CB size (for example, in LTE, the CB max may be 6144 bits; or, in NR, the CB max may be 8192 bits, etc.);
  • the maximum value of the CB data length CBmax refers to the maximum CB size minus the size of the CRC added for the CB.
  • the transmitting end determines the reference value N CB_re of the number of CBs divided by the TB according to the data length TBS of the TB and the maximum value CB max of the data length of the CB.
  • the transmitter can be based on the formula Determine N CB_re , where ceil() means round up; then, according to the formula Determining a reference value N Group_re of the number of CB groups, where N CB_min represents a minimum value of the number of CBs included in one CB group, and N CB_min may be preset or signaling configured, wherein the signaling configuration may include Signaling or physical layer signaling dynamic/semi-static configuration, where the high layer signaling may be radio resource control (RRC) layer signaling or medium access control (MAC) layer signaling.
  • RRC radio resource control
  • MAC medium access control
  • the transmitter can also pass the formula Determining the reference value N Group_re of the number of CB groups, where N CB_perGroup indicates the granularity of the CB group, that is, the number of CBs included in the CB group, and the N CB_perGroup may be configured in advance or signaling, wherein the signaling configuration may include High-level signaling or physical layer signaling dynamic/semi-static configuration.
  • the transmitter can also pass the formula A reference value N Group_re of the number of CB groups is determined, where N CB_max represents the maximum number of CBs included in one CB group, that is, the number of CBs included in the CB group.
  • N CB_max may be pre-configured or signaled , wherein the signaling configuration may include dynamic/semi-static configuration through higher layer signaling or physical layer signaling.
  • the transmitting end uses the reference value N Group_re of the number of CB groups, the maximum value N Group_max of the number of CB groups, and the minimum value of the number n of CCUs as the actual value m of the number of CB groups.
  • the transmitting end determines the actual value m of the number of CB groups according to the data length TBS of the TB, the maximum value CB group max of the CB group, the maximum value N Group_max of the CB group number, and the number n of CCUs .
  • the CB group max refers to the maximum number of bits included in the CB group, and the CB group max and N Group_max may be configured in advance or signaling, wherein the signaling configuration may include dynamic/physical layer signaling dynamic/half Static configuration.
  • the mode 2 may include the following steps S21 to S22:
  • the transmitting end determines the reference value N Group_re of the number of CB groups according to the data length TBS of the TB and the maximum value CB group max of the data length of the CB group.
  • the data length TBS of the TB refers to the data length L TB of the TB itself. If a CRC is added for the TB, the data length TBS of the TB is the sum of the data length L TB of the TB itself and the size TB CRC of the CRC added for the TB. That is, S21 can include any of the following:
  • the transmitting end uses the reference value N Group_re of the number of CB groups, the maximum value N Group_max of the number of CB groups, and the minimum value of the number n of CCUs as the actual value m of the number of CB groups.
  • step S22 reference may be made to S12 above.
  • Mode 3 The transmitting end determines the actual value m of the number of CB groups according to the data length TBS of the TB.
  • Mode 4 The transmitting end determines the actual value m of the number of CB groups according to the maximum value N Group_max of the number of CB groups. Optionally, the transmitting end uses N Group_max as the actual value m of the number of CB groups.
  • Mode 5 The transmitting end determines the actual value m of the number of CB groups according to the number n of CCUs. Optionally, the transmitting end uses the number n of CCUs as the actual value m of the number of CB groups.
  • Embodiment 6 The transmitting end of the maximum data length of CB max TB and TBS data length of CB, to determine the actual value of the number m of groups CB.
  • the transmitting end determines the reference value N Group_re of the number of CB groups according to the TBS and the CB max , and the specific implementation manner of the step may refer to the foregoing S11. Then, N Group_re is taken as the actual value m of the number of CB groups.
  • Mode 7 The transmitting end determines the actual value m of the number of CB groups according to the data length TBS of the TB and the maximum value CB group max of the data length of the CB group.
  • the transmitting end determines the reference value N Group_re of the number of CB groups according to the TBS and the CB group max .
  • N Group_re is taken as the actual value m of the number of CB groups.
  • Mode 8 The transmitting end determines the actual value m of the number of CB groups according to the data length TBS of the TB and the maximum value N Group_max of the number of CB groups.
  • one or more preset thresholds may be set in the transmitting end; then, the transmitting end may determine m according to the TBS, the one or more preset thresholds, and N Group_max .
  • the transmitting end determines the actual value m of the number of CB groups according to the data length TBS of the TB and the number n of CCUs.
  • Embodiment 10 The transmitting side data length TB of TBS, the maximum data length of CB CB CB group max and the maximum number N Group_max, determining an actual value of the number m of groups CB.
  • the transmitting end determines the reference value N Group_re of the number of CB groups according to the TBS and the CB max , and the specific implementation manner of the step may refer to the foregoing S11. Then, the minimum value in N Group_re and N Group_max is taken as the actual value m of the number of CB groups.
  • the transmitting end determines the actual value m of the number of CB groups according to the data length TBS of the TB, the maximum value CB group max of the data length of the CB group, and the maximum value N Group_max of the CB group number.
  • the transmitting end determines the reference value N Group_re of the number of CB groups according to the TBS and the CB group max .
  • the minimum value in N Group_re and N Group_max is taken as the actual value m of the number of CB groups.
  • the embodiment of the present invention provides a plurality of implementation manners for determining the actual value m of the number of CB groups included in one TB.
  • implementation manners for determining the actual value m of the number of CB groups included in one TB refer to the manners 1 to 11 of the specific embodiment part of determining the actual value m of the number of CB groups.
  • at least two categories are as follows:
  • the first category first according to the formula
  • N CB_re of the number of CBs divided by the TB is determined; and the actual value m of the number of CB groups is determined. As in modes 1, 6 and 10.
  • the second category first according to the formula
  • N Group_re of the number of CB groups into which the TB is divided is determined; and the actual value m of the number of CB groups is determined.
  • N CB_re may not be divisible by m determined by the first type of manner, and therefore, the number of CBs in different CB groups may be different.
  • the method may further comprise: according to the formula or among them Indicates rounding up; Indicates rounding down to determine the number C of CBs in each CB group, where C includes C + and C - .
  • the number of CBs in each CB group may exist in the following two cases, labeled as C + and C - :
  • the CB group having C + CBs may be the first N + CB groups in the m CB groups.
  • the CB group having C - CB groups is the last N - CBs in the m CB groups. group.
  • the CB group having C + CBs may be the last N + CB groups in the m CB groups, and in this case, the CB group having C - CB groups is the first N - CB groups in the m CB groups.
  • the specific implementation is not limited to this.
  • the CB number of 3 CB groups is 4, 1 CB
  • the number of CBs in the group is 3.
  • the four CB groups can be: ⁇ 0, 1, 2, 3 ⁇ , ⁇ 4, 5, 6, 7 ⁇ , ⁇ 8, 9, 10, 11 ⁇ , ⁇ 12,13,14 ⁇ or ⁇ 0,1,2 ⁇ , ⁇ 3,4,5,6, ⁇ , ⁇ 7,8,9,10 ⁇ , ⁇ 11,12,13,14 ⁇ .
  • the TBS may not be divisible by the m determined by the second type, and therefore, the number of bits included in different CB groups may be different.
  • the number of bits in each CB group may exist in the following two cases, labeled as: B + and B - :
  • the CB group with B + bits may be the first m-1 CB groups in the m CB groups.
  • the CB group with B - bits is the last CB group in the m CB groups.
  • the CB group having B + bits may be the last m-1 CB groups in the m CB groups, and in this case, the CB group having B - bits is the first CB group among the m CB groups.
  • B + and B - refer to the data length of the CB group itself; if CRC is added to the CB group, B + and B - refer to the data length of the CB group itself.
  • the method may further include the following steps S100-S100a:
  • the transmitting end determines, in the m CB groups, according to the actual value m of the number of CB groups and the number n of CCUs. A mapping relationship between each CB group and each of the n CCUs.
  • mapping relationship between the number of the i-th CB group and the number of CCUs may be determined according to the following formula 1:
  • n i represents the number of CCUs mapped by the i-th CB group
  • floor() represents rounding down.
  • the above formula 1 shows the correspondence between the number of the i-th CB group and the number of CCUs, but there is no mapping relationship between which CB group and which one or more CCUs are specifically associated.
  • the mapping relationship between each CB group and the CCU is not limited.
  • the mapping relationship between each CB group and the CCU may be sequentially set according to the order of n CCUs. .
  • mapping between the first group and the CB 1 CCU CCU to the n 1 first there is a mapping between the second group and the CB n 1 + 1'd CCU to a first number n 1 + n 2 CCU Relationship, and so on, the mth CB group and the n 1 + n 2 + ... n m-1 +1 CCU to the n 1 + n 2 + ... n m-1 + n m CCU
  • the CB group is mapped to the corresponding CCU according to a certain rule, so that if interference occurs during data transmission, only the time-frequency domain resources occupied by the interference may be determined. It is determined which data in the CB group is interfered, so interference cancellation (IC) can be better than the prior art.
  • the transmitting end determines the data length of each CB group in the m CB groups according to the mapping relationship and the size of resources available for transmitting data in the n CCUs.
  • the resource that can be used to transmit data refers to a resource that remains after resources other than non-data information such as control information, GP, and reference information.
  • the transmitting end may determine the data length of the i-th CB group in the m CB groups according to the following formula 2:
  • B i represents the data length of the i-th CB group in the m CB groups, 1 ⁇ i ⁇ m, and i is an integer.
  • L TB represents the data length of the TB
  • L TB_CRC represents the size of the CRC added for the TB
  • S CB_i represents the size of the resource available for transmitting data in the CCU corresponding to the i-th CB group
  • S total represents n
  • the size of the resources in the CCU that can be used to transfer data, and floor() means rounding down.
  • L TB_CRC ⁇ 0 in the above formula 2 indicates that the transmitting end can divide the TB into m CB groups, or after adding CRC to the TB, it can be further divided into m CB groups.
  • RE i represents the number of REs available for transmitting data in the CCU corresponding to the i-th CB group
  • RE total represents the number of REs available for transmitting data in the n CCUs
  • Sym i represents the number of symbols available for transmitting data in the CCU corresponding to the i-th CB group
  • Sym total represents the number of symbols available for transmitting data in n CCUs.
  • each CB group is determined, and the data in the m CB groups can be distributed as uniformly as possible on the n CCUs, so that each CB group is
  • the code rate after coding and rate matching is basically the same, which facilitates the normal operation of adaptive modulation and coding (AMC).
  • the method may further include the following step S101a:
  • S101a The transmitting end divides the data in each CB group into C CBs.
  • C ceil(B/(CB max -CB CRC ).
  • C ceil(B/CB max ).
  • ceil( ) indicates rounding up
  • B indicates the data length of the CB group
  • CB max indicates the maximum value of the data length of the CB
  • CB CRC indicates the size of the CRC added for the CB.
  • the data length B of the CB group refers to the data length L CB group of the CB group itself. If a CRC is added to the CB group, the data length B of the CB group refers to the sum of the data length L CB group of the CB group itself and the CRC size CB group CRC added for the CB group. That is, the optional implementation may include any of the following:
  • the method for dividing the TB into m CB groups, the CB component is C CB, the mapping relationship between m CB groups and n CCUs, etc. Both can be pre-agreed by the transmitting end and the receiving end, that is, the transmitting end does not need to indicate such information to the receiving end.
  • information such as which TB and/or which CB group the data transmitted on the first time-frequency resource belongs to may be pre-agreed by the transmitting end and the receiving end.
  • the information may also be a transmitting end indication. To the receiving end.
  • the method for transmitting data to the receiving end by the transmitting end is described above.
  • the transmitting end needs to send the DCI to the receiving end in addition to the data processed by the above step to the receiving end.
  • the DCI is used to indicate how the receiving end processes the received data.
  • the embodiment of the present invention provides a DCI design method. Specifically, the DCI may include the following information:
  • MCS modulation and coding scheme
  • the DCI may include one MCS to indicate the MCS used by the data carried on the first time-frequency resource.
  • multiple MCS indications may also be used to indicate the MCS used for the data to be transmitted this time, where each copy is used to indicate the data mapped on one CCU. MCS, or the MCS used to indicate the data of a CB group.
  • the modulation mode and the coding mode are collectively referred to as MCS, and one modulation mode and coding mode are indicated by using one MCS indication.
  • the modulation mode and the coding mode may also be independently indicated, for example, using 1 or N modulation mode indications to indicate the modulation mode used for the data to be transmitted, and/or using 1 or N coding modes. To indicate the encoding method used for the data transmitted this time.
  • the transmission redundancy information indication is used to indicate the transmission redundancy information used by the data transmitted this time.
  • the transmission redundancy information indication is related to an encoding algorithm used when the transmitting end encodes, and the encoding algorithm may include but is not limited to a turbo encoding algorithm or a low-density parity-check (LDPC) encoding algorithm.
  • the transmission redundancy information indication may specifically be a redundancy version (RV).
  • RV redundancy version
  • the transmission redundancy information indication may specifically be related information indicating an LDPC encoding retransmission incremental redundancy (IR) combining.
  • IR incremental redundancy
  • one RV may be used to indicate the RV used by the data carried on the first time-frequency resource.
  • multiple RVs may also be used to indicate the RV used by the data transmitted this time, wherein each RV used to indicate the data mapped on one CCU is used. , or the RV used to indicate the data of a CB group.
  • a new data indicator is used to indicate whether the data mapped on the first time-frequency resource is new data or retransmitted data.
  • the NDI may be set to 1 or N, wherein N shares of NDI are N bits, where N may be the number of CCUs included in the first time-frequency resource, or may be the maximum number of CB groups. The actual value m of the value or number of CB groups. If N is the number of CCUs included in the first time-frequency resource, each bit indicates whether the data mapped on the corresponding CCU is new data or retransmitted data. If N is the maximum value of the number of CB groups or the actual value m of the number of CB groups, each bit indicates whether the data of the corresponding CB group is new data or retransmitted data.
  • the information indicating the newly transmitted data in the NDI is meaningless, for example, it can be used to represent the corresponding CB group not to be retransmitted on the scheduled resource. It is to be understood that the information for indicating this meaning is not limited to NDI as long as the function of the information indicating this meaning is the same as the function of the NDI. If the current transmission process transmits new data and retransmits data, the information indicating the newly transmitted data and the retransmitted data in the NDI is meaningful.
  • the DCI may further include information about which TB and/or which CB group the data transmitted on the first time-frequency resource belongs to. In this way, the robustness of communication can be enhanced.
  • multiple TB data may also be transmitted in one transmission, and the multiple TBs Data is multiplexed with the same time-frequency resources.
  • multiple TBs for example, 2 TBs
  • multiple CB groups or 2 CB groups
  • FDM frequency division multiplexing
  • DMT time division multiplexing
  • a resource mapping mode indication can be added in the DCI.
  • the multiplexing mapping method for indicating two codewords is space division, frequency division or time division.
  • subsequent ACK/NACK feedbacks are compatible with LTE, or reuse LTE designs (eg, 2TB or 2CB groups are individually fed back, scheduled independently, each corresponding to a NDI, RV, or MCS, etc.).
  • the transmitting end when the technical solution provided by the embodiment of the present invention is applied to a multiple-input multiple-output (MIMO) system, when multiple TBs are transmitted in a single transmission process, the transmitting end is used.
  • Each of the plurality of TBs may operate independently, that is, each of the plurality of TBs performs data transmission according to the technical solution provided by the present application.
  • the transmitting end can also perform joint operations on the multiple TBs.
  • a unified grouping manner can be determined according to the TB with the largest or smallest data length among the multiple TBs.
  • TBS or the like in the process of determining the actual value m of the number of CB groups may be determined based on the TB having the largest or smallest data length among the plurality of TBs.
  • FIG. 10 is a schematic flowchart of another data transmission provided by an embodiment of the present invention. An explanation of the relevant content in this alternative implementation can be found above.
  • the method may include the following steps S201 to S204:
  • the receiving end receives the control information, where the control information includes the information of the TB.
  • the control information may be DCI.
  • the design method of DCI can refer to the above.
  • the TB information includes the data length of the TB.
  • the information of the TB may further include at least one of the following information: an actual value m of the CB group divided by the TB, a number of CCUs mapped by the TB, and an allocation rule of dividing the TB into m CB groups.
  • the CB component is an allocation rule of CB, an identifier of at least one CB group and a CCU to which it is mapped, a configuration mode of the CCU, and the like.
  • the receiving end receives the TB mapped to the first time-frequency resource.
  • the first time-frequency resource includes n CCUs, the CCU is part of the time-frequency resources in the first time-frequency resource, and there are no overlapping time-frequency resources between different CCUs;
  • the TB includes m CB groups, and the m CB groups Each CB group includes at least one CB, and data in different CB groups are mapped to different CCUs; data of different CB groups overlap in the frequency domain and do not overlap in the time domain, or data of different CB groups is There is overlap in the time domain and no overlap in the frequency domain; m ⁇ 2, m is an integer, n ⁇ m, and n is an integer.
  • the information of the TB includes the data length of the TB.
  • the method may further include: receiving, according to the data length of the TB, the maximum value of the data length of the CB, the maximum value of the CB group number, and the The number n of CCUs determines the actual value m of the number of CB groups.
  • S203 The receiving end determines a mapping relationship between each CB group in the m CB groups and each CCU in the n CCUs.
  • the receiving end determines, according to the actual value m of the number of CB groups and the number n of the CCUs, each CB group in the m CB groups and each CCU in the n CCUs.
  • the mapping relationship between. A related explanation of this implementation can be referred to above.
  • S204 The receiving end acquires m CB groups from the first time-frequency resource according to the mapping relationship, and demodulates and decodes the data of the m CB groups to generate one TB of data.
  • the method may further include: the receiving end determines data of each CB group in the m CB groups according to the mapping relationship and the size of resources available for transmitting data in the n CCUs. length.
  • the receiving end determines data of each CB group in the m CB groups according to the mapping relationship and the size of resources available for transmitting data in the n CCUs. length.
  • the method may further include: the receiving end divides the data in each CB group into C CBs, and the specific implementation manner may refer to the foregoing, and details are not described herein again.
  • the “receiving end acquires m CB groups from the first time-frequency resource according to the mapping relationship” in S204 may be regarded as a process of resource inverse mapping.
  • the receiving end demodulates and decodes the data of the m CB groups to generate one TB of data, which may include: receiving, by the receiving end, according to the descrambling, demodulation, rate matching inverse operation included in the DCI, decoding, and then The decoded data is concatenated to generate one TB of data.
  • the method may further include: performing, by the receiving end, the CRC check and the like after decoding the data of the m CB groups. Further optionally, the method may further include: the following steps S1 to S2:
  • the receiving end feeds back multiple ACK/NACKs to the transmitting end according to the number of CB groups mapped on the first time-frequency resource;
  • the number of bits may be a fixed value set by the system, where the fixed value may be greater than or equal to the CB group.
  • a value of the maximum value of the number may be dynamically adjusted to the actual value m of the number of CB groups according to information such as TBS or MCS. Each bit is used to indicate whether the data in the corresponding CB group is correctly verified.
  • a CRC is added to each CB and a CRC is added to each CB group, when the CRC of all CBs in a CB group is verified correctly, and the CRC of the CB group is correct, the reception is received.
  • the terminal feeds back an ACK on the corresponding bit of the CB group, and otherwise feeds back NACK.
  • the receiving end feeds back an ACK on the corresponding bit of the CB group, and otherwise returns a NACK.
  • the transmitting end receives the ACK/NACK feedback sent by the receiving end.
  • the method may further include: the receiving end checks the CRC of each CB and/or the CRC of the TB.
  • the receiving end checks the CRC of each CB and/or the CRC of the TB.
  • the data of the next TB is continuously transmitted to the receiving end according to the data transmission method provided above. If the ACK/NACK feedback received by the transmitting end includes the NACK, the data of the CB group corresponding to the NACK may be retransmitted to the receiving end according to the retransmission processing procedure provided below.
  • the first type only retransmitted data is transmitted during one transmission.
  • FIG. 11 it is a schematic diagram of a transmission process.
  • the time-frequency resource shown in (a) of FIG. 11 represents the time-frequency resource allocated in the first transmission process, and the time-frequency resource is 1 slot in the time domain, and the slot is 7 symbols.
  • the time-frequency resources are divided into CCU1 to CCU4.
  • the data transmitted during the first transmission is the new transmission data TB, and the TB is divided into CB group 1 to CB group 4.
  • Each CB group is sequentially mapped to one CCU in the order of the CCU group.
  • the ACK/NACK fed back by the receiving end to the transmitting end indicates that the data in CB2 and CB4 needs to be retransmitted
  • the data in CB2 and CB4 can be classified according to the CCU group.
  • the order is sequentially mapped to two CCUs, that is, the data in CB2 is mapped to CCU1 and CCU2, and the data in CB4 is mapped to CCU3 and CCU4, as shown in (b) of FIG.
  • the CCU configuration rule in the retransmission process and the mapping relationship between the retransmitted CB group and the CCU may be pre-agreed by the transmitting end and the receiving end, so the transmitting end does not need to indicate to the receiving end. .
  • each of the retransmissions may also be indicated in the DCI during the retransmission process.
  • the mapping relationship between the CB group and the CCU may be pre-agreed by the transmitting end and the receiving end, so the transmitting end does not need to indicate to the receiving end.
  • retransmission resources can also be allocated on demand.
  • the ACK/NACK fed back by the receiving end to the transmitting end indicates that the data in CB2 and CB4 needs to be retransmitted, and in the second transmission, the transmitting end only allocates CCU2 and CCU4, wherein CCU2 is used for retransmission.
  • the data in CB2, CCU4 is used to retransmit the data in CB4.
  • the re-transmitted data may occupy the same resources as the initial one, for example, the CCU occupied by the retransmitted data is the same as the number and/or location of the CCU occupied by the initial transmission. This can save control signaling overhead.
  • the number of retransmitted CB groups can be increased in the DCI.
  • the NDI in the process of retransmission indicates that the data of the two CB groups that are initially transmitted needs to be retransmitted.
  • the number of CB groups in the DCI that are retransmitted is indicated as one group, so the indication in the NDI is implicitly indicated.
  • the two CB combinations are combined into one CB group.
  • RB may be adaptively reduced.
  • the location of the time-frequency resource mapped by the retransmitted data in the current transmission process is the same as the location of the time-frequency resource mapped when the newly transmitted data corresponding to the retransmitted data is transmitted. In this way, the transmitting end does not need to indicate to the receiving end the location of the time-frequency resource occupied by the retransmitted data.
  • the location of the time-frequency resource mapped by the retransmitted data in the current transmission process may be different from the location of the time-frequency resource mapped when the newly transmitted data corresponding to the retransmitted data is transmitted. The transmitting end needs to indicate to the receiving end the location of the time-frequency resource occupied by the retransmitted data.
  • FIG. 12 it is a schematic diagram of a transmission process. It is assumed that the time-frequency resource allocated in each transmission is 1 slot in the time domain, and the slot includes 7 symbols; and the time-frequency resources allocated in each transmission are divided into 4 CCUs, that is, CCU1 to CCU4; Each of the first three CCUs includes 2 symbols, and the last CCU includes 1 symbol. Then:
  • the new transmission data TB1 is transmitted, and the transmitting end can determine the size of TB1 according to the size of CCU1 ⁇ CCU4, and then divide TB1 into four CB groups according to the size of TB1 and the method provided above, marked as CB group 1.1 to CB group 1.4; Next, each CB group is sequentially mapped to one CCU in the order of the CCU group, as shown in (a) of FIG. If the ACK/NACK fed back by the receiving end to the transmitting end indicates that the data in CB1 and CB3 needs to be retransmitted during the first transmission, then:
  • the transmitting end may determine the size of the new transmission data TB2 according to the available CCUs (ie, CCU2 and CCU4), and then according to the size of TB2 and the method provided above.
  • TB2 is divided into 1 CB group, labeled as CB group 2.1; next, the CB group is mapped into CCU1 and CCU3 as shown in (b) of FIG.
  • the ACK/NACK fed back by the receiving end to the transmitting end indicates that the data in CB1 and CB3 needs to be retransmitted.
  • the transmitting end when data in multiple CB groups needs to be retransmitted, the transmitting end retransmits data in the multiple CB groups in one transmission process.
  • the data in the multiple CB groups may be retransmitted in multiple transmissions.
  • the information of the currently retransmitted CB group may be indicated in the DCI during each transmission.
  • the information of the currently retransmitted CB may include at least one of the following information: an identifier of the CB group, and an identifier of the TB to which the CB group belongs.
  • the transmitting end determines that the CB group needs to be retransmitted, the data of the entire CB group is retransmitted.
  • the process of data transmission if some data in a CB group is interfered, it is transmitted.
  • the terminal may select one or more interfered symbols in the CB group that needs to be retransmitted according to the characteristics of the interference (for example, the interference shown by the broken line frame 1 shown in FIG. 2 or the interference shown by the broken line frame 2).
  • the data mapped on the /min-slot/slot is retransmitted, or the data mapped on the interfered one or more RBs is selected for retransmission, or the data mapped on the interfered one or more CCUs is selected for weighting. Pass and so on.
  • This implementation considers targeted retransmissions, and the retransmission process has a smaller scheduling granularity than the data in the retransmission CB group, so that the transmission efficiency can be further improved.
  • the resource allocation indication of the retransmitted data and the information of the retransmitted data may be added in the DCI (for example, the retransmitted data is those symbols in the initial transmission process/min) -slot/slot/RB/data on the CCU) and so on.
  • FIG. 12 is a schematic diagram of interaction of a data transmission method according to an embodiment of the present invention.
  • the method shown in Figure 12a includes the following steps S301-S305:
  • the transmitting end divides the TB into m CB groups, and each CB group includes at least one CB.
  • the transmitting end performs coded modulation on the data in the m CB groups and maps the data to the first time-frequency resource.
  • the transmitting end sends data mapped to the first time-frequency resource, and control information, where the information of the TB is included in the control information.
  • the receiving end receives the control information and the data mapped to the first time-frequency resource.
  • the control information may be used by the receiving end to determine the value of m.
  • the receiving end acquires the m CB groups from the first time-frequency resource, and demodulates and decodes the data of the m CB groups to generate a TB data.
  • the method of determining m by the transmitting end and the receiving end the method of using the CB component as the CB, the method of transmitting the multiple TB, and the like can be referred to the above, and details are not described herein again.
  • one TB is divided into multiple CB groups, and each CB group includes at least one CB group, so that if the receiving end determines that data transmission of one or more CBs in one CB group or one CB group fails, Then, the transmitting end only needs to retransmit the data of the CB group, thereby saving resources and improving transmission efficiency.
  • each network element such as a transmitting end, a receiving end, etc.
  • each network element includes corresponding hardware structures and/or software modules for performing various functions.
  • the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the modules and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.
  • the embodiment of the present invention may divide the function module by the transmitting end and the receiving end according to the foregoing method example.
  • each function module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 13 shows a possible structural diagram of the data transmission device 130 involved in the above embodiment.
  • the data transmission device 130 can be the transmitting end of the above.
  • the data transmission device 130 may include a division module 1301, a mapping module 1302, and a transmission module 1303.
  • the method further includes: determining module 1304.
  • Each of these functional modules has Some of the functions may be inferred according to the steps in the method embodiments provided above, or may be referred to the content provided in the above section of the invention, and details are not described herein again.
  • the above-described partitioning module 1301, mapping module 1302, and determining module 1304 may be integrated into one processing module in the data transmission device.
  • the data transmission device may further include a receiving module and a storage module. The transmitting module 1303 and the receiving module can be integrated into one communication module in the data transmission device.
  • FIG. 14 is a schematic structural diagram of a data transmission device 140 according to an embodiment of the present invention.
  • the data transmission device 140 can be the transmitting end of the above.
  • the data transmission device 140 can include a processing module 1401 and a communication module 1402.
  • the processing module 1401 is configured to control and manage the actions of the data transmission device 140.
  • the processing module 1401 is configured to support the data transmission device 140 to perform S101 and S102 in FIG. 7, FIG. 8, FIG. 8a and FIG. 9, in FIG. S100 and S100a, and S301 and S302, etc. in Figure 12a, and/or other processes for supporting the techniques described herein.
  • the communication module 1402 is configured to support communication of the data transmission device 140 with other network entities, such as communication with the receiving end, etc., for example, supporting the data transmission device 140 to perform S103 in FIGS. 7, 8, 8a, and 9, and FIG. 12a S303, etc., and/or other processes for supporting the techniques described herein.
  • the data transmission device 140 may further include: a storage module 1403, where the data transmission device 140 executes the program code and data corresponding to any of the data transmission methods provided above.
  • the processing module 1401 can be a processor or a controller.
  • the communication module 1402 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 1403 may be a memory.
  • the processing module 1401 is a processor
  • the communication module 1402 is a transceiver
  • the storage module 1403 is a memory
  • the data transmission device 140 may be as shown in FIG.
  • FIG. 15 is a schematic structural diagram of a data transmission device 150 according to an embodiment of the present invention.
  • the data transmission device 150 includes a processor 1501, a memory 1502, a system bus 1503, and a communication interface 1504.
  • the processor 1501, the memory 1502, and the communication interface 1504 are connected by a system bus 1503.
  • the memory 1502 is configured to store computer execution instructions.
  • the processor 1501 executes the computer execution instructions stored in the memory 1502 to cause the data transmission device 150 to perform any of the data transmission methods provided by the embodiments of the present invention.
  • For specific data transmission methods reference may be made to the related descriptions in the above and the drawings, and details are not described herein again.
  • the embodiment of the invention further provides a storage medium, which may include a memory 1502.
  • the processor 1501 may be a processor or a collective name of a plurality of processing elements.
  • the processor 1501 may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and field programmable.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 1501 may also be a dedicated processor, which may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of the data transfer device 140.
  • the memory 1502 may include a volatile memory such as a random-access memory (RAM); the memory 1502 may also include a non-volatile memory. (non-volatile memory), such as read-only memory (ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD); memory 1502 Combinations of the above types of memory may also be included.
  • RAM random-access memory
  • non-volatile memory such as read-only memory (ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD); memory 1502 Combinations of the above types of memory may also be included.
  • the system bus 1503 can include a data bus, a power bus, a control bus, and a signal status bus. For the sake of clarity in the present embodiment, various buses are illustrated as system bus 1503 in FIG.
  • Communication interface 1504 may specifically be a transceiver on data transmission device 140.
  • the transceiver can be a wireless transceiver.
  • the wireless transceiver can be an antenna or the like of the data transmission device 140.
  • the processor 1501 performs data transmission and reception with other devices, for example, with the base station via the communication interface 1504.
  • each step in the flow of any one of the data transmission methods provided above may be implemented by the processor 1501 in hardware form executing a computer-executed instruction in the form of software stored in the memory 1502. To avoid repetition, we will not repeat them here.
  • FIG. 16 shows a possible structural diagram of the data transmission device 160 involved in the above embodiment.
  • the data transmission device 16 can be the receiving end of the above.
  • the data transmission device 160 may include a receiving module 1601, a determining module 1602, and an obtaining module 1603.
  • the method further includes: a dividing module 1604.
  • the function of each of the functional modules may be inferred according to the steps in the method embodiments provided above, or may refer to the content provided in the above content of the invention, and details are not described herein again. .
  • the above determining module 1602, obtaining module 1603, and partitioning module 1604 may be integrated into one processing module in the data transmission device.
  • the data transmission device may further include a sending module and a storage module.
  • the receiving module 1601 and the transmitting module can be integrated into one communication module in the data transmission device.
  • FIG. 17 is a schematic structural diagram of a data transmission apparatus 170 according to an embodiment of the present invention.
  • the data transmission device 170 can include a processing module 1701 and a communication module 1702.
  • the processing module 1701 is configured to control and manage the actions of the data transmission device 170.
  • the processing module 1701 is configured to support the data transmission device 170 to perform S203 and S204 in FIG. 10, and S305 in FIG. 12a, and/or to support Other processes of the techniques described herein.
  • the communication module 1702 is configured to support communication of the data transmission device 170 with other network entities, such as communication with the transmitting end, etc., for example, the communication module 1702 is configured to support the data transmission device 170 to perform S304 in FIG. 12a, and/or to support this document. Other processes of the described techniques.
  • the data transmission device 170 may further include: a storage module 1703, configured to store the program code and data corresponding to any of the data transmission methods provided by the data transmission device 170.
  • the processing module 1701 can be a processor or a controller.
  • the communication module 1702 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 1703 can be a memory.
  • the processing module 1701 is a processor
  • the communication module 1702 is a transceiver
  • the storage module 1703 is a memory
  • the data transmission device 170 according to the embodiment of the present invention may be as shown in FIG. 18.
  • FIG. 18 is a schematic structural diagram of a data transmission device 180 according to an embodiment of the present invention.
  • the data transmission device 180 can be the receiving end of the above.
  • the data transmission device 180 can include a processor 1801, a memory 1802, a system bus 1803, and a communication interface 1804.
  • the processor 1801, the memory 1802, and the communication interface 1804 are connected by a system bus 1803.
  • the memory 1802 is configured to store computer execution instructions, and when the data transmission device 180 is in operation, the processor 1801 executes the computer stored in the memory 1802.
  • the instructions are executed to enable the data transmission device 180 to perform any of the data transmission methods provided by the embodiments of the present invention.
  • For specific data transmission methods reference may be made to the related descriptions in the following and the accompanying drawings, and details are not described herein again.
  • the embodiment of the invention further provides a storage medium, which may include a memory 1802.
  • the processor 1801 may be a processor or a collective name of a plurality of processing elements.
  • the processor 1801 can be a CPU.
  • the processor 1801 can also be other general purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 1801 may also be a dedicated processor, which may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of the data transfer device 180.
  • the memory 1802 can include volatile memory, such as RAM; the memory 1802 can also include non-volatile memory, such as a ROM, flash memory, HDD, or SSD; the memory 1802 can also include a combination of the types of memory described above.
  • volatile memory such as RAM
  • non-volatile memory such as a ROM, flash memory, HDD, or SSD
  • the memory 1802 can also include a combination of the types of memory described above.
  • the system bus 1803 can include a data bus, a power bus, a control bus, and a signal status bus. For the sake of clarity in the present embodiment, various buses are illustrated as the system bus 1803 in FIG.
  • Communication interface 1804 may specifically be a transceiver on data transmission device 180.
  • the transceiver can be a wireless transceiver.
  • the wireless transceiver can be an antenna or the like of the data transmission device 180.
  • the processor 1801 performs data transmission and reception with other devices, for example, and the transmitting end through the communication interface 1804.
  • each step in the flow of any one of the data transmission methods provided above may be implemented by the processor 1801 in hardware form executing a computer-executed instruction in the form of software stored in the memory 1802. To avoid repetition, we will not repeat them here.
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请公开了一种数据传输方法和装置，涉及数据处理技术领域，用以提高传输效率。该方法包括：接收控制信息和映射至第一时频资源上的传输块TB的数据；从第一时频资源中获取TB中的m个编码块CB组，将m个CB组的数据经过解调译码后进行级联生成一个TB的数据，其中，m为正整数，m＝min(NCB_re,NGroup_max)，NCB_re为TB中的CB的个数，NGroup_max为CB组数的最大值，m个CB组中的每一个CB组包括至少一个CB，NCB_re为根据TB的大小TBS和CB的数据长度的最大值确定的，TBS为根据控制信息确定的。

Description

一种数据传输方法和装置
本申请要求于2016年11月04日提交中国专利局、申请号为201610982030.6、发明名称为“一种数据传输方法和装置”，于2016年12月30日提交中国专利局、申请号为201611271245.3、发明名称为“一种数据传输方法和装置”的中国专利申请的优先权，以及于2017年03月20日提交中国专利局、申请号为201710167223.0、发明名称为“一种数据传输方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及数据处理技术领域，尤其涉及一种数据传输方法和装置。
背景技术
长期演进(long term evolution，LTE)技术中，发射端对数据的处理流程包括：为传输块(transport block，TB)添加循环冗余校验(cyclic redundancy check，CRC)；将TB分成一个或多个编码块(code block，CB)，并为每个CB添加CRC；然后为每个CB编码、速率匹配和资源映射等操作后发送出去。接收端接收到数据后经资源逆映射和速率匹配等逆操作后，对每个CB尝试译码。若所有CB译码后的数据的CRC校验成功，且TB的CRC校验成功，则反馈1bit(比特)肯定应答(acknowledgement，ACK)指示，以通知发射端该TB成功传输；若某个CB译码后的数据的CRC校验失败或该TB的CRC校验失败，则反馈1bit否定应答(negative acknowledgement，NACK)指示，以通知发射端该TB传输失败，发射端可以重传该TB的数据，以确保数据通信的可靠性。
上述方法中，接收端若确定某个CB译码后的数据的CRC校验失败，发射端就需要重传整个TB的数据，这样会导致传输效率较低的问题。
发明内容
本发明的实施例提供一种数据传输方法和装置，用以提高传输效率。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，提供一种TB分组方法，包括：将TB分为m个编码块CB组，其中，m≥2，m为整数，CB组包括至少一个CB。该技术方案中，将一个TB分为了多个CB组，每个CB组包括至少一个CB组，这样，若将该技术方案应用于数据传输过程中，则接收端若确定一个CB组或一个CB组中的一个或多个CB的数据传输失败，则发射端只需重传该CB组的数据即可，从而可以节省资源，提高传输效率。示例的，一个CB组内的CB译码后的数据的CRC均校验成功，则反馈ACK，以通知发射端该CB组成功传输；否则，反馈NACK，以通知发射端该CB组传输失败，发射端可以重传该CB组的数据。
在一种可能的设计中，将TB分为m个CB组，可以包括：根据CB组数的最大值NGroup_max确定CB组数的实际值m。可选的，m＝NGroup_max。该实施方式的相关描述可参考具体实施方式部分“确定CB组数的实际值m”的方式4。
在一种可能的设计中，将TB分为m个CB组，可以包括：根据TB的数据长度TBS、CB的数据长度的最大值CBmax和CB组数的最大值NGroup_max，确定CB组数的实际值m。该实施方式的相关描述可参考具体实施方式部分“确定CB组数的实际值m”的方式10。
可选的，首先，根据公式
Figure PCTCN2017109362-appb-000001
确定TB所分成的CB的个数的参考值NCB_re。然后，根据公式
Figure PCTCN2017109362-appb-000002
确定CB组数的实际值m。其中：
TBS表示TB的数据长度。若不为TB添加CRC，则TB的数据长度TBS是指TB本身的数据长度。若为TB添加CRC，则TB的数据长度TBS是指TB本身的数据长度与为TB添加的CRC的大小之和。
CBmax表示CB的数据长度的最大值。若不为CB添加CRC，则CB的数据长度的最大值CBmax是指最大CB大小(比如，在LTE中，CBmax可以为6144bit；或者，在NR/5G中，CBmax可以是8192bit等)；若为CB添加CRC，则CB的数据长度的最大值CBmax是指最大CB大小减去为CB添加的CRC的大小。ceil()表示向上取整。
K可以是1，或者一个CB组中包含的CB的个数的最小值NCB_min，或者一个CB组中包含的CB的个数(或称为CB组的粒度)NCB_perGroup，或者一个CB组中包含的CB的个数的最大值NCB_max。其中，NCB_min、NCB_perGroup和NCB_max均可以是预先设置或信令配置的，其中，信令配置可以包括通过高层信令或物理层信令动态/半静态配置。
在一种可能的设计中，将TB分为m个CB组，可以包括：根据TB的数据长度TBS、CB组的数据长度的最大值CB组max和CB组数的最大值NGroup_max，确定CB组数的实际值m。该实施方式的相关描述可参考具体实施方式部分“确定CB组数的实际值m”的方式11。
可选的，根据公式
Figure PCTCN2017109362-appb-000003
确定CB组数的参考值NGroup_re；然后，根据公式m＝min(NGroup_re,NGroup_max)确定m。其中，关于TBS的相关解释可以参考上文。若不为CB组添加CRC，则CB组max是指CB组本身的数据最大比特数。若为CB组添加CRC，则CB组max是指CB组本身的数据最大比特数减去为CB组添加的CRC的大小。其中，CB组max可以是预先设置或信令配置的，其中，信令配置可以包括通过高层信令或物理层信令动态/半静态配置。
上文任一种方案中涉及的NGroup_max可以是预先设置或信令配置的，其中，信令配置可以包括通过高层信令或物理层信令动态/半静态配置。
在一种可能的设计中，将TB分为m个CB组，可以包括：根据TB的数据长度TBS，确定CB组数的实际值m。可选的，发射端中可以设置一个或多个预设阈值；然后，发射端可以根据TBS和该一个或多个预设阈值确定m。该实施方式的相关描述可参考具体实施方式部分“确定CB组数的实际值m”的方式3。
在一种可能的设计中，将TB分为m个CB组，可以包括：根据TB的数据长度TBS和CB的数据长度的最大值CBmax，确定CB组数的实际值m。该实施方式的相关描述可参考具体实施方式部分“确定CB组数的实际值m”的方式6。
在一种可能的设计中，将TB分为m个CB组，可以包括：根据TB的数据长度TBS和CB组的数据长度的最大值CB组max，确定CB组数的实际值m。该实施方式的相关描述可参考具体实施方式部分“确定CB组数的实际值m”的方式7。
在一种可能的设计中，将TB分为m个CB组，可以包括：根据TB的数据长度TBS和CB组数的最大值NGroup_max，确定CB组数的实际值m。该实施方式的相关描述可参考具体实施方式部分“确定CB组数的实际值m”的方式8。
本发明实施例提供了多种确定一个TB中包含的CB组数的实际值m的实现方式，具体可以参考具体实施方式部分“确定CB组数的实际值m”的方式1～方式11。其中，至少包括如下两类：
第一类：先根据公式
Figure PCTCN2017109362-appb-000004
确定TB所分成的CB的个数的参考值NCB_re；再确定CB组数的实际值m。如方式1、6和10。
第二类：先根据公式
Figure PCTCN2017109362-appb-000005
确定TB所分成的CB组的个数的参考值NGroup_re；再确定CB组数的实际值m。如方式2、7和11。
基于第一类方式，NCB_re可能不能被第一类方式确定的m整除，因此，不同的CB组中的CB的个数可能不同。在一种可能的设计中，该方法还可以包括：根据公式
Figure PCTCN2017109362-appb-000006
或
Figure PCTCN2017109362-appb-000007
其中
Figure PCTCN2017109362-appb-000008
表示向上取整；
Figure PCTCN2017109362-appb-000009
表示向下取整，确定每个CB组中的CB的个数C，其中，C包括C+和C-。进一步地，该方法还可以包括：根据公式N+＝NCB_re-mC-，确定具有C+个CB的CB组的组数N+；根据公式N-＝m-N+，确定具有C-个CB的CB组的组数N-。该实现方式提供了一种确定CB组中的CB的个数的方式。
基于第二类方式，TBS可能不能被第二类方式确定的m整除，因此，不同的CB组中包含的比特数可能不同。在一种可能的设计中，该方法还可以包括：根据公式
Figure PCTCN2017109362-appb-000010
或B-＝TBS-(m-1)B+确定每个CB组中的比特数B。该实现方式提供了一种确定CB组中包含的比特数的方式。
第二方面，提供一种数据传输方法，包括：将TB分为m个编码块CB组，其中，m≥2，m为整数，CB组包括至少一个CB；将m个CB组中的数据经过编码调制后映射至第一时频资源上；发送映射至第一时频资源上的数据。该技术方案中，将一个TB分为了多个CB组，每个CB组包括至少一个CB组，这样，接收端若确定一个CB组或一个CB组中的一个或多个CB的数据传输失败，则发射端只需重传该CB组的数据即可，从而可以节省资源，提高传输效率。其中，关于确定m的过程可以参考上述第一方面，此处不再赘述。
在一种可能的设计中，该方法还可以包括：为每个CB组添加CRC。
在一种可能的设计中，该方法还可以包括：为每个CB添加CRC。
在一种可能的设计中，该方法还可以包括：将每个CB组分为C个CB；其中，当每个CB都添加CRC时，C＝ceil(B/(CBmax-CBCRC)；当每个CB都不添加CRC时，C＝ceil(B/CBmax)；ceil()表示向上取整，B表示CB组的数据长度，CBmax表示CB的数据长度的最大值，CBCRC表示为CB添加的CRC的大小；其中，若不为CB组添加CRC， 则CB组的数据长度B是指CB组本身的数据长度LCB组；若为CB组添加CRC，则CB组的数据长度B是指CB组本身的数据长度LCB组与为CB组添加的CRC的大小CB组CRC之和。该可能的设计提供了一种CB组划分CB的方法。具体的：
当将CB组分为C个CB，且不为CB添加CRC时，
Figure PCTCN2017109362-appb-000011
当将CB组分为C个CB组，且为CB添加CRC时，
Figure PCTCN2017109362-appb-000012
当将CB组与为该CB组添加的CRC分为C个CB，且不为CB添加CRC时，
Figure PCTCN2017109362-appb-000013
当将CB组与为该CB组添加的CRC分为C个CB，且为CB组添加CRC时，
Figure PCTCN2017109362-appb-000014
在一种可能的设计中，该方法还可以包括：接收M比特的HARQ指示，其中，每比特的HARQ指示用于指示对应的CB组中的数据是否正确接收，M为CB组数的最大值或CB组数的实际值m。该可能的设计提供了一种传输HARQ指示的方法。
在一种可能的设计中，在MIMO系统中，一次传输过程中传输的多个TB空分复用时，发射端可以对该多个TB中的每个TB独立操作，即：该多个TB中的每个TB均按照本申请提供的技术方案进行数据传输。发射端也可以对该多个TB进行联合操作，例如，可以根据该多个TB中数据长度最大或最小的TB，确定统一的分组方式。例如，可以根据该多个TB中数据长度最大或最小的TB，确定CB组数的实际值m的过程中的TBS等。该可能的设计提供了一种同时传输的多个TB分组的实现方式。
在一种可能的设计中，该方法还可以包括：发送控制信息，其中，控制信息包括以下信息中的至少一种：1份或N份调制和编码方式MCS，1份或N份新传数据指示NDI，1份或N份冗余版本RV；其中，N表示CB组数的最大值或CB组数的实际值m。其中，该控制信息可以是下行控制信息DCI。该技术方案提供了一种传输下行控制信息DCI的方法。
在一种可能的设计中，若本次传输过程只传输重传数据，则NDI中表示新传数据的信息无意义。若本次传输过程传输新传数据和重传数据，则NDI中表示新传数据和重传数据的信息均有意义。
第三方面，提供一种数据传输方法，包括：接收控制信息；其中，控制信息中包括传输块TB的信息，TB包括m个编码块CB组，CB组包括至少一个CB，m≥2，m为整数。然后，从第一时频资源中获取m个CB组，并将m个CB组的数据经过解调译码后进行级联生成一个TB的数据。
在一种可能的设计中，该方法还可以包括：确定CB组数的实际值m。其实现过程可以参考上述第一方面，此处不再赘述。
在一种可能的设计中，该方法还可以包括：反馈M比特的自动重传请求HARQ指示，其中，每比特的HARQ指示用于指示对应的CB组中的数据是否正确接收，M为CB组数的最大值或CB组数的实际值m。可选的，当TB译码失败(即CRC校验不通过)时，反馈M比特的NACK指示。
在一种可能的设计中，在从第一时频资源中提取m个CB组之后，该方法还可以包括：将每个CB组中的数据分成C个CB；其中，当每个CB都添加循环冗余校验CRC时，C＝ceil(B/(CBmax-CBCRC)；当每个CB都不添加CRC时，C＝ceil(B/CBmax)；ceil()表示向上取整，B表示CB组的数据长度，CBmax表示CB的数据长度的最大值，CBCRC表示为CB添加的CRC的大小；其中，若不为CB组添加CRC，则CB组的数据长度是指CB组本身的数据长度；若为CB组添加CRC，则CB组的数据长度是指CB组本身的数据长度与为CB组添加的CRC的大小之和。
在一种可能的设计中，该方法还以包括：接收控制信息；控制信息中包括以下信息中的至少一种：1份或N份调制和编码方式MCS，1份或N份新传数据指示NDI，1份或N份冗余版本RV；其中，N表示CB组数的最大值或CB组数的实际值m。
可以理解的，第三方面提供的任一种技术方案的相关内容的解释及有益效果，均可以参考上述第二方面相应的技术方案。
第四方面，提供一种TB分组装置，用于执行上述第一方面提供的任一种TB分组方法。该TB分组装置包括：划分模块，用于将TB分为m个编码块CB组，其中，m≥2，m为整数，CB组包括至少一个CB。
在一种可能的设计中，划分模块具体用于：根据CB组数的最大值NGroup_max确定CB组数的实际值m。可选的，m＝NGroup_max。
在一种可能的设计中，划分模块具体用于：根据TB的数据长度TBS、CB的数据长度的最大值CBmax和CB组数的最大值NGroup_max，确定CB组数的实际值m。
在一种可能的设计中，划分模块具体用于：根据TB的数据长度TBS、CB组的数据长度的最大值CB组max和CB组数的最大值NGroup_max，确定CB组数的实际值m。
在一种可能的设计中，划分模块具体用于：根据TB的数据长度TBS，确定CB组数的实际值m。
在一种可能的设计中，划分模块具体用于：根据TB的数据长度TBS和CB的数据长度的最大值CBmax，确定CB组数的实际值m。
在一种可能的设计中，划分模块具体用于：根据TB的数据长度TBS和CB组的数据长度的最大值CB组max，确定CB组数的实际值m。
在一种可能的设计中，划分模块具体用于：根据TB的数据长度TBS和CB组数的最大值NGroup_max，确定CB组数的实际值m。
在一种可能的设计中，若划分模块根据公式
Figure PCTCN2017109362-appb-000015
确定TB所分成的CB的个数的参考值NCB_re；再确定CB组数的实际值m。则，划分模块还可以用于：根据公式
Figure PCTCN2017109362-appb-000016
或
Figure PCTCN2017109362-appb-000017
其中
Figure PCTCN2017109362-appb-000018
表示向上取整；
Figure PCTCN2017109362-appb-000019
表示向下取整，确定每个CB组中的CB的个数C。进一步地，划分模块还可以用于：根据公式N+＝NCB_re-mC-，确定具有C+个CB的CB组的组数N+；根据公式N-＝m-N+，确定具有C-个CB的CB组的组数N-。
在一种可能的设计中，若划分模块先根据公式
Figure PCTCN2017109362-appb-000020
确定TB所分 成的CB组的个数的参考值NGroup_re；再确定CB组数的实际值m。则，划分模块还可以用于：根据公式
Figure PCTCN2017109362-appb-000021
或B-＝TBS-(m-1)B+确定每个CB组中的比特数B。
可以理解的，第四方面提供的任一种技术方案的相关内容的解释及有益效果，均可以参考上述第一方面相应的技术方案。
第五方面，提供一种数据传输装置，用于执行上述第二方面提供的任一种数据传输方法。该数据传输装置可以包括：包括：划分模块、映射模块和发送模块。其中，划分模块，用于将传输块TB分为m个编码块CB组，其中，m≥2，m为整数，CB组包括至少一个CB。映射模块，用于将m个CB组中的数据经过编码调制后映射至第一时频资源上。发送模块，用于发送映射至第一时频资源上的数据。
其中，划分模块的具体实现方式可以参考上述第三方面，此处不再赘述。
在一种可能的设计中，该装置还可以包括：添加模块，用于为每个CB组添加CRC。和/或，用于为每个CB添加CRC。
在一种可能的设计中，划分模块还可以用于：将每个CB组分为C个CB；其中，当每个CB都添加CRC时，C＝ceil(B/(CBmax-CBCRC)；当每个CB都不添加CRC时，C＝ceil(B/CBmax)；ceil()表示向上取整，B表示CB组的数据长度，CBmax表示CB的数据长度的最大值，CBCRC表示为CB添加的CRC的大小；其中，若不为CB组添加CRC，则CB组的数据长度B是指CB组本身的数据长度LCB组；若为CB组添加CRC，则CB组的数据长度B是指CB组本身的数据长度LCB组与为CB组添加的CRC的大小CB组CRC之和。
在一种可能的设计中，该装置还可以包括：接收模块，用于接收M比特的自动重传请求HARQ指示，其中，每比特的HARQ指示用于指示对应的CB组中的数据是否正确接收，M表示CB组数的最大值或CB组数的实际值m。
在一种可能的设计中，发送模块还可以用于：发送控制信息，其中，控制信息包括以下信息中的至少一种：1份或N份调制和编码方式MCS，1份或N份新传数据指示NDI，1份或N份冗余版本RV；其中，N表示CB组数的最大值或CB组数的实际值m。其中，该控制信息可以是下行控制信息DCI。
在一种可能的设计中，若本次传输过程只传输重传数据，则NDI中表示新传数据的信息无意义。若本次传输过程传输新传数据和重传数据，则NDI中表示新传数据和重传数据的信息均有意义。
可以理解的，第五方面提供的任一种技术方案的相关内容的解释及有益效果，均可以参考上述第二方面相应的技术方案。
第六方面，提供一种数据传输装置，用于执行上述第三方面提供的任一种数据传输方法。该数据传输装置可以包括：接收模块和获取模块。其中，接收模块，用于接收控制信息；控制信息中包括传输块TB的信息，TB包括m个编码块CB组，CB组包括至少一个CB，m≥2，m为整数。获取模块，用于从第一时频资源中获取m个CB组，并将m个CB组的数据经过解调译码后进行级联生成一个TB的数据。
在一种可能的设计中，该装置还可以包括：确定模块，用于确定CB组数的实际值m。其具体实现过程可以参考上述第四方面中的划分模块的功能，此处不再赘述。
在一种可能的设计中，TB的信息还可以包括以下信息中的至少一种：1份或N份调制和编码方式MCS，1份或N份新传数据指示NDI，1份或N份冗余版本RV；其中，N表示CB组数的最大值或CB组数的实际值m。
在一种可能的设计中，该装置还可以包括：发送模块，用于反馈M比特的自动重传请求HARQ指示，其中，每比特的HARQ指示用于指示对应的CB组中的数据是否正确接收，M为CB组数的最大值或CB组数的实际值m。可选的，当TB的CRC校验不通过时，反馈M比特的NACK指示。
可选的，M为CB组数的最大值时，只有前m比特有效，或者只有前m比特用于指示对应CB组中的数据是否正确接收。当然具体具体实现时不限于此。
在一种可能的设计中，该装置还可以包括：划分模块，用于：将每个CB组中的数据分成C个CB；其中，当每个CB都添加循环冗余校验CRC时，C＝ceil(B/(CBmax-CBCRC)；当每个CB都不添加CRC时，C＝ceil(B/CBmax)；ceil()表示向上取整，B表示CB组的数据长度，CBmax表示CB的数据长度的最大值，CBCRC表示为CB添加的CRC的大小；其中，若不为CB组添加CRC，则CB组的数据长度是指CB组本身的数据长度；若为CB组添加CRC，则CB组的数据长度是指CB组本身的数据长度与为CB组添加的CRC的大小之和。
可以理解的，第六方面提供的任一种技术方案的相关内容的解释及有益效果，均可以参考上述第三方面相应的技术方案。
在上述任一方面或者任一方面提供的任一种可能的设计中，第一时频资源上映射的数据包括新传数据和重传数据中的至少一种，其中，新传数据包括上文所涉及的TB。
第七方面，提供一种TB分组装置，该装置可以是发射端，也可以是接收端，该装置可以实现上述第一方面提供的TB分组方法示例中所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。
在一种可能的设计中，该装置的结构中包括处理器、存储器、系统总线和通信接口；该处理器被配置为支持该装置执行上述第一方面提供的方法中相应的功能。该通信接口用于支持该装置与其他网元之间的通信。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该通信接口具体可以是收发器。
第八方面，提供一种数据传输装置，该装置可以是发射端，该装置可以实现上述第二方面提供的数据传输方法示例中所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。
在一种可能的设计中，该装置的结构中包括处理器、存储器、系统总线和通信接口；该处理器被配置为支持该装置执行上述第二方面提供的方法中相应的功能。该通信接口用于支持该装置与其他网元(例如接收端)之间的通信。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该通信接口具体可以是收发器。
第九方面，提供一种数据传输装置，该装置可以是接收端，该装置可以实现上述 第三方面提供的数据传输方法示例中所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。
在一种可能的设计中，该装置的结构中包括处理器、存储器、系统总线和通信接口；该处理器被配置为支持该装置执行上述第三方面提供的方法中相应的功能。该通信接口用于支持该装置与其他网元(例如接收端)之间的通信。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该通信接口具体可以是收发器。
第十方面，提供一种计算机存储介质，用于储存上述第一方面提供的TB分组方法所对应的计算机软件指令，其包含用于执行上述第七方面所设计的程序。
第十一方面，提供一种计算机存储介质，用于储存上述第二方面提供的数据传输方法所对应的计算机软件指令，其包含用于执行上述第八方面所设计的程序。
第十二方面，提供一种计算机存储介质，用于储存上述第三方面提供的数据传输方法所对应的计算机软件指令，其包含用于执行上述第九方面所设计的程序。
第十三方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第一方面提供的任一种TB分组方法。
第十四方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第二方面提供的任一种数据传输方法。
第十五方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第三方面提供的任一种数据传输方法。
可以理解地，上述提供的任一种数据传输装置或计算机存储介质或计算机程序产片均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。
下面提供本申请提供的另一个技术方案：
目前，资源映射的过程包括：按照先频域后时域的规则将经编码和速率匹配等操作后的每个CB依次映射至时频资源上。这样，在数据传输过程中，若受到干扰，则该干扰会影响到多个CB组的数据的准确性，因此该多个CB组的数据可能均需要重传，从而降低了传输效率。为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，提供一种数据传输方法，包括：将TB分为m个CB组，其中，m≥2，m为整数，m个CB组中的每一个CB组包括至少一个CB。然后，将m个CB组中的数据经过编码调制后映射至第一时频资源上，接着，发送映射至第一时频资源上的数据。其中，第一时频资源包括n个CB容器单元CCU，CCU为第一时频资源中的部分时频资源，不同CCU之间没有重叠的时频资源；不同CB组中的数据被映射至不同的CCU上；其中，不同CB组的数据在频域上有重叠且在时域上没有重叠，或者，不同CB组的数据在时域上有重叠且在频域上没有重叠；n≥m，n为整数。该技术方案中，可以按照一定的规则将本次传输所分配的时频资源(即第一时频资源)划分为多个CCU，再将本次传输的一个TB分为多个CB组；然后，将该多个CB组的数据经过编码调制后映射至相应的CCU上，使得不同的CB组中的数据在时域上没有重叠或在频域上没有重叠。这样，若不同CB组中的数据在时域上没有重叠，则当某个符 号受到干扰时，该干扰只会影响到一个CB组的数据的准确性，因此，只需要重传该CB组的数据即可，与现有技术相比，提高了传输效率。若不同CB组中的数据在频域上没有重叠，则当本次传输的数据在传输过程中，某个窄频带受到干扰时，相比现有技术，该干扰所影响到的CB组的组数较少，因此需要重传的CB组较少，提高了传输效率。
第二方面，提供一种数据传输装置，该装置包括：划分模块、映射模块和发送模块。其中，划分模块，用于将传输块TB分为m个编码块CB组，其中，m≥2，m为整数，m个CB组中的每一个CB组包括至少一个CB。映射模块，用于将m个CB组中的数据经过编码调制后映射至第一时频资源上；其中，第一时频资源包括n个CB容器单元CCU，CCU为第一时频资源中的部分时频资源，不同CCU之间没有重叠的时频资源；不同CB组中的数据被映射至不同的CCU上；其中，不同CB组的数据在频域上有重叠且在时域上没有重叠，或者，不同CB组的数据在时域上有重叠且在频域上没有重叠；n≥m，n为整数。发送模块用于发送映射至第一时频资源上的数据。该技术方案的有益效果可以参考上文。
在一种可能的设计中，上述第一方面中的将TB分为m个CB组，可以包括：根据TB的数据长度、CB的数据长度的最大值、CB组的数据长度的最大值、CB组数的最大值和CCU的个数n中的至少一个，确定CB组数的实际值m。可选的，该可能的设计中的上述步骤可以包括：根据TB的数据长度和CB的数据长度的最大值，确定CB组数的参考值；然后，将CB组数的参考值、CB组数的最大值和CCU的个数n中的最小值，作为CB组数的实际值m。
对应的，上述第二方面中的划分模块具体可以用于：根据TB的数据长度、CB的数据长度的最大值、CB组的数据长度的最大值、CB组数的最大值和CCU的个数n中的至少一个，确定CB组数的实际值m。可选的，划分模块具体可以用于：根据TB的数据长度和CB的数据长度的最大值，确定CB组数的参考值；然后，将CB组数的参考值、CB组数的最大值和CCU的个数n中的最小值，作为CB组数的实际值m。
一般地，发射端需要在每次传输数据之前，确定本次可传输的TB的数据长度，其具体的确定方式此处不进行限定，例如可参考现有技术。一般地，CB的数据长度的最大值和CB组数的最大值可以是预设的。
在一种可能的设计中，在上述第一方面的将TB分为m个CB组之前，上述第一方面提供的方法还可以包括：根据CB组数的实际值m和CCU的个数n，确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系；然后，根据映射关系和n个CCU中可用于传输数据的资源的大小，确定m个CB组中的每个CB组的数据长度。可选的，根据映射关系和n个CCU中可用于传输数据的资源的大小，确定m个CB组中的每个CB组的数据长度，可以包括：根据以下公式①确定m个CB组中的第i个CB组的数据长度：
Figure PCTCN2017109362-appb-000022
其中，Bi表示m个CB组中的第i个CB组的数据长度，1≤i≤m，i为整数；LTB表示TB的数据长度，LTB_CRC表示为TB添加的循环冗余校验CRC的大小，LTB_CRC≥0，SCB_i表示第i个CB组对应的CCU中可用于传输数据的资源的大小，Stotal表示n个CCU中可用于传输数据的资源的大小，floor()表示向下取整。
对应的，上述第二方面提供的装置还可以包括确定模块。该确定模块用于：根据CB组数的实际值m和CCU的个数n，确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系；然后根据映射关系和n个CCU中可用于传输数据的资源的大小，确定m个CB组中的每个CB组的数据长度。可选的，该确定模块具体可以用于根据上述公式①确定m个CB组中的第i个CB组的数据长度。
该可能的设计方式能够尽可能保证m个CB组中的数据尽量均匀地分布在n个CCU上，从而使得每个CB组经编码和速率匹配后的码率基本一致，便于AMC正常工作。
在一种可能的设计中，上述第一方面提供的方法还可以包括：将每个CB组中的数据分成C个CB。对应的，上述第二方面中的划分模块还可以用于：将每个CB组中的数据分成C个CB。其中，当每个CB都添加CRC时，C＝ceil(B/(CBmax-CBCRC)；当每个CB都不添加CRC时，C＝ceil(B/CBmax)；ceil()表示向上取整，B表示CB组的数据长度，CBmax表示CB的数据长度的最大值，CBCRC表示为CB添加的CRC的大小。
在一种可能的设计中，TB的信息包括TB的数据长度。
第三方面，提供一种数据传输方法，包括：接收控制信息；其中，控制信息中包括传输块TB的信息；接收映射至第一时频资源上的TB；其中，第一时频资源包括n个CB容器单元CCU，CCU为第一时频资源中的部分时频资源，不同CCU之间没有重叠的时频资源；TB包括m个编码块CB组，m个CB组中的每一个CB组包括至少一个CB；不同CB组的数据在频域上有重叠且在时域上没有重叠，或者，不同CB组的数据在时域上有重叠且在频域上没有重叠；m≥2，m为整数，n≥m，n为整数；确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系；根据映射关系从第一时频资源中获取m个CB组，并将m个CB组的数据经过解调译码后进行级联生成一个TB的数据。
第四方面，提供一种数据传输装置，包括：接收模块，用于接收控制信息，其中，控制信息中包括传输块TB的信息；以及，接收映射至第一时频资源上的TB；其中，第一时频资源包括n个CB容器单元CCU，CCU为第一时频资源中的部分时频资源，不同CCU之间没有重叠的时频资源；TB包括m个编码块CB组，m个CB组中的每一个CB组包括至少一个CB，不同CB组中的数据被映射至不同的CCU上；不同CB组的数据在频域上有重叠且在时域上没有重叠，或者，不同CB组的数据在时域上有重叠且在频域上没有重叠；m≥2，m为整数，n≥m，n为整数。确定模块，用于确定 m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系。获取模块，用于根据映射关系从第一时频资源中获取m个CB组，并将m个CB组的数据经过解调译码后进行级联生成一个TB的数据。
在一种可能的设计中，在上述第三方面中的接收控制信息之后，上述第三方面提供的方法还可以包括：根据TB的数据长度、CB的数据长度的最大值、CB组的数据长度的最大值、CB组数的最大值和CCU的个数n中的至少一个，确定CB组数的实际值m。可选的，根据TB的数据长度和CB的数据长度的最大值，确定CB组数的参考值；将CB组数的参考值、CB组数的最大值和CCU的个数n中的最小值，作为CB组数的实际值m。
对应的，上述第四方面中的确定模块还可以用于：根据TB的数据长度、CB的数据长度的最大值、CB组的数据长度的最大值、CB组数的最大值和CCU的个数n中的至少一个，确定CB组数的实际值m。可选的，确定模块具体可以用于：根据TB的数据长度和CB的数据长度的最大值，确定CB组数的参考值；将CB组数的参考值、CB组数的最大值和CCU的个数n中的最小值，作为CB组数的实际值m。
在一种可能的设计中，上述第三方面中的确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系，可以包括：根据CB组数的实际值m和CCU的个数n，确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系。
对应的，上述第四方面中的确定模块具体可以用于：根据CB组数的实际值m和CCU的个数n，确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系。
在一种可能的设计中，在上述第三方面中的确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系之后，上述第三方面提供的方法还可以包括：根据映射关系和n个CCU中可用于传输数据的资源的大小，确定m个CB组中的每个CB组的数据长度。可选的，根据上述公式①确定m个CB组中的每个CB组的数据长度。
对应的，上述第四方面中的确定模块还可以用于：根据映射关系和n个CCU中可用于传输数据的资源的大小，确定m个CB组中的每个CB组的数据长度。可选的，该确定模块具体可以用于：根据上述公式①确定m个CB组中的每个CB组的数据长度。
在一种可能的设计中，在上述第三方面中的根据映射关系从第一时频资源中提取m个CB组之后，上述第三方面提供的方法还可以包括：将每个CB组中的数据分成C个CB。对应的，上述第四方面提供的装置还可以包括：划分模块，用于：将每个CB组中的数据分成C个CB。其中，关于如何确定C的取值可以参考上文。
在上述任一方面或者任一方面提供的任一种可能的设计中，第一时频资源上映射的数据包括新传数据和重传数据中的至少一种，其中，新传数据包括上文所涉及的TB。
第五方面，提供一种数据传输装置，该装置可以是发射端，该装置可以实现上述 第一方面提供的数据传输方法示例中所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。
在一种可能的设计中，该装置的结构中包括处理器、存储器、系统总线和通信接口；该处理器被配置为支持该装置执行上述第一方面提供的方法中相应的功能。该通信接口用于支持该装置与其他网元(例如接收端)之间的通信。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该通信接口具体可以是收发器。
第六方面，提供一种计算机存储介质，用于储存上述第一方面提供的数据传输方法所对应的计算机软件指令，其包含用于执行上述第五方面所设计的程序。
第七方面，提供一种数据传输装置，该装置可以是接收端，该装置可以实现上述第三方面提供的数据传输方法示例中所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。
在一种可能的设计中，该装置的结构中包括处理器、存储器、系统总线和通信接口；该处理器被配置为支持该装置执行上述第三方面提供的方法中相应的功能。该通信接口用于支持该装置与其他网元(例如发射端)之间的通信。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该通信接口具体可以是收发器。
第八方面，提供一种计算机存储介质，用于储存上述第三方面提供的数据传输方法所对应的计算机软件指令，其包含用于执行上述第六方面所设计的程序。
第九方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第一方面提供的任一种数据传输方法。
第十方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第三方面提供的任一种数据传输方法。
可以理解地，上述提供的任一种数据传输装置或计算机存储介质或计算机程序产品均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。
附图说明
图1为现有技术提供的一种资源映射的示意图；
图2为基于图1提供的一种干扰场景示意图；
图3为基于图1提供的另一种干扰场景示意图；
图4为本发明实施例提供的一种划分第一时频资源的示意图；
图5为本发明实施例提供的另一种划分第一时频资源的示意图；
图6为本发明实施例提供的另一种划分第一时频资源的示意图；
图7为本发明实施例提供的一种数据传输方法的流程示意图；
图8为本发明实施例提供的另一种数据传输方法的流程示意图；
图8a为本发明实施例提供的另一种数据传输方法的流程示意图；
图9为本发明实施例提供的另一种数据传输方法的流程示意图；
图10为本发明实施例提供的另一种数据传输方法的流程示意图；
图11为本发明实施例提供的一种传输过程的示意图；
图12为本发明实施例提供的另一种传输过程的示意图；
图12a为本发明实施例提供的一种数据传输方法的交互示意图；
图13为本发明实施例提供的一种数据传输装置的结构示意图；
图14为本发明实施例提供的另一种数据传输装置的结构示意图；
图15为本发明实施例提供的另一种数据传输装置的结构示意图；
图16为本发明实施例提供的另一种数据传输装置的结构示意图；
图17为本发明实施例提供的另一种数据传输装置的结构示意图；
图18为本发明实施例提供的另一种数据传输装置的结构示意图。
具体实施方式
如图1所示，为一种资源映射的示意图。在图1中，横轴表示时域，纵轴表示频域。时域上示出了本次传输过程中所分配的时域资源，具体是1个时隙(slot)，该slot包括7个符号，即符号0～6；频域上示出了本次传输过程中所分配的频域资源。图1中是以本次传输过程中传输的TB包括6个CB，即CB1～CB6，为例进行说明的。假设CB1～CB3构成CB组1，CB4～CB6构成CB组2；那么，基于图1所示的资源映射方式，在下述方案1、2所示的场景中会降低传输效率。具体的：
方案1：一个符号上可能映射有多个CB组的数据，该情况下，在数据传输过程中，若该符号受到干扰，则该干扰会影响到该符号上映射的多个CB组的数据的准确性，因此该多个CB组的数据可能均需要重传，从而降低了传输效率。示例的，若干扰所在的时频资源如图2中的虚线框1所示，即符号3受到了干扰，则该干扰会影响到CB3和CB4的数据的准确性，即影响到CB组1和CB组2的数据的准确性，因此CB组1和CB组2的数据可能均需要重传，从而降低了传输效率。
方案2：一个窄带宽上可能映射有所有CB组的数据，该情况下，在数据传输过程中，若该窄带宽受到干扰，则该干扰会影响到所有CB组的数据的准确性，因此该所有CB组的数据可能均需要重传，从而降低了传输效率。示例的，若干扰所在的时频资源如图2中的虚线框2所示，即本次传输过程中所分配的窄带宽受到了干扰，则该干扰会影响到CB1～CB6的数据的准确性，即影响到CB组1和CB组2的数据的准确性，因此CB组1和CB组2的数据可能均需要重传，从而降低了传输效率。
基于此，本发明实施例提供了一种数据传输方法和装置。其基本原理为：通过一定的规则将本次传输所分配的时频资源划分为多个CCU，再将本次传输的一个TB分为多个CB组；然后，将该多个CB组的数据经过编码调制后映射至相应的CCU上，使得不同的CB组中的数据在时域上没有重叠或在频域上没有重叠。这样，若不同CB组中的数据在时域上没有重叠，则当本次传输的数据在传输过程中，受到如图2中的虚线框1所示的干扰，则该干扰只会影响到一个CB组的数据的准确性，因此，只需要重传该CB组的数据即可，与现有技术相比，提高了传输效率。若不同CB组中的数据在频域上没有重叠，则当本次传输的数据在传输过程中，受到如图2中的虚线框2所示的干扰，则相比现有技术，该干扰所影响到的CB组的组数较少，因此需要重传的CB组较少，提高了传输效率。
本发明实施例提供的技术方案可以应用于如图2所示的系统架构中，图2所示的系统架构包括：发射端和接收端。其中，发射端和接收端均可以包括但不限于：基站、用户设备等。
本发明实施例提供的技术方案可以应用于各种通信系统，例如当前4G通信系统，以及未来演进网络，如5G通信系统。例如，长期演进(long term evolution，LTE)系统，第三代合作伙伴计划(3rd generation partnership project，3GPP)相关的蜂窝系统等，以及其他此类通信系统。需要说明的是，5G标准中的应用场景可以包括但不限于：用户设备与用户设备之间的通信场景，基站与基站之间的通信场景，基站与用户设备之间的通信场景等。本发明实施例提供的技术方案也可以应用于5G通信系统中的用户设备与用户设备之间的通信，或基站与基站之间的通信等场景中。
下面对本申请所涉及的部分内容进行简要说明，以方便读者理解：
第一时频资源，是指本次传输过程所分配的时频资源。本发明实施例对每次传输过程所分配的时频资源的大小，以及如何确定每次传输过程所分配的时频资源的大小均不进行限定。任意两次传输过程所分配的时频资源的大小可以相等也可以不相等。示例的，一次传输过程所分配的时域资源可以是LTE系统中的传输时间间隔(transmission time interval，TTI)，或符号级短TTI，或高频系统中的大子载波间隔的短TTI，也可以是5G系统中的slot或微型时隙(mini-slot)等。本发明实施例对此不做限定。
CCU，即CB容器单元(CB container unit)，是一次传输过程所使用的部分时域资源。本发明实施例对CCU的大小不进行限定。不同CCU之间没有重叠的时频资源。不同CCU的大小可以相等也可以不相等。
本发明实施例对配置CCU，即将一次传输过程所分配的时频资源划分为多个CCU，的方式不进行限定，例如，CCU可以是动态配置的、半静态配置的或者静态配置的。示例的，可以根据当前所调度的业务的调度特征来配置CCU。例如，在调度增强移动宽带(enhanced mobile broadband，eMBB)业务的过程中，若需要调度低时延高可靠通信(ultra-reliable and Low-Latency communications，URLLC)业务，则可以根据URLLC业务的调度特征，来配置CCU。URLLC业务的调度特征可以包括：调度URLLC业务时所分配的时频资源的大小和位置等。
下面举例说明将第一时频资源划分为多个CCU的实现方式：
方式1：通过划分时域资源，实现将第一时频资源划分为多个CCU。具体的，可以以任一时域资源粒度划分时域资源，例如以符号的整数倍为粒度划分时域资源。
示例的，若第一时频资源的时域资源是一个slot，则可以以mini-slot或符号等为粒度划分该时域资源，以实现将第一时频资源划分为多个CCU。如图4所示，为一种划分第一时频资源的示意图。在图4中，横轴表示时域，纵轴表示频域。图4中是以1个slot为7个符号，且将该slot划分为4个部分为例进行说明的，该情况下，前3个部分可以分别由2个符号构成，最后1个部分由1个符号构成。若第一时频资源的时域资源是多个slot，则可以以slot、mini-slot或符号等为粒度划分该时域资源，以实现将第一时频资源划分为多个CCU。
方式2：通过划分频域资源，实现将第一时频资源划分为多个CCU。具体的，可 以以任一频域资源粒度划分频域资源，例如以资源元素(resource element，RE)的整数倍或者以资源块(resource block，RB)的整数倍为粒度，连续的划分频域资源或者离散的划分频域资源。其中，连续的划分频域资源可以包括连续均匀的划分频域资源。离散的划分频域资源可以包括离散均匀的划分频域资源或者等间隔离散的划分频域资源等。需要说明的是，离散的划分频域资源可在后续将数据经过编码调制后映射至时频资源上后，可获得频域分集增益。
本文中的术语“多个”是指两个或两个以上。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系；在公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
如图5所示，为一种划分第一时频资源的示意图。在图5中，横轴表示时域，纵轴表示频域。图5中是以第一时频资源的频域资源为8个RB，且将该频域资源分为2个部分为例进行说明的，该情况下，每个部分可以由4个RB构成。其中，每个部分的4个RB可以是连续的，如图5中的(a)所示；也可以是离散的，如图5中的(b)所示。
方式3：通过划分时域资源和频域资源，实现将第一时频资源划分为多个CCU。方式3是方式1和方式2的结合，其相关描述可参考上文。
如图6所示，为一种划分第一时频资源的示意图。在图6中，横轴表示时域，纵轴表示频域。图6是基于图5中的(a)和图4进行绘制的。图6中的每种阴影部分的时频资源表示一个CCU。
需要说明的是，本发明实施例中所描述的slot中的符号，可以包括以下两种定义：
1)、slot中的符号是帧结构中定义的符号，例如一个slot可以包含7个符号或14个符号等。
2)、slot中的符号是slot内用于承载数据的符号。在某些帧格式设计下，slot中的符号不完全是用于承载数据的符号(即数据符号)，例如slot中起始的一个或多个符号是用于承载下行控制信息的符号(即控制符号)，结束的1个或多个符号是用于承载上行控制信息的符号(即控制符号)，中间存在用于传输下行切换上行时需要的保护间隔(Guard Period，GP)的符号(即GP符号)、以及用于传输参考信息的符号(即参考符号)等。该情况下，本申请说明书附图中所示的slot的符号是指slot中的数据符号，即slot中除控制符号、GP符号和参考符号等非数据符号后的符号。
另外需要说明的是，上述任一种配置CCU的规则均可以是发射端和接收端预先约定好的，也可以是发射端通过信令向接收端指示的。
下面结合本发明实施例中的附图，对本发明实施例中的技术方案进行示例性描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。
如图7所示，是本发明实施例提供的一种数据传输方法的流程示意图。图7所示的方法可以包括以下步骤S101～S103：
S101：发射端将TB分为m个CB组，其中，m≥2，m为整数，m个CB组中的每一个CB组包括至少一个CB。
具体的，若不为TB添加CRC，则发射端将TB分为m个CB组；若为TB添加CRC，则发射端将TB和为TB添加的CRC作为整体分为m个CB组。本次传输过程中可以传输新传数据，也可以传输新传数据和重传数据，该新传数据包括该TB。另外一次传输过程中也可以只传输重传数据。关于重传数据的描述可以参考下文。
在S101之前，该方法还可以包括：发射端确定TB的大小，然后获取该TB的数据。若本次传输过程中只传输新传数据，则发射端可以根据本次传输过程所分配的时频资源(即下文中的第一时频资源)的大小，来确定本次可传输的TB的大小；若本次传输过程中传输新传数据和重传数据，则发射端可以根据本次传输过程所分配的时频资源(即下文中的第一时频资源)中的可用于传输新传数据的时频资源的大小，确定本次可传输的TB的大小。其中，可用于传输新传数据的时频资源可以是本次传输过程所分配的时频资源与重传数据所占的时频资源之差。
需要说明的是，相比TB来说，本发明实施例中的CB组也可以被称为小TB或者子TB(即Sub-TB)等。另外，具体实现时，发射端也可以将TB划分为1个CB组，该情况下，CB组与TB表示的含义相同。
S102：发射端将m个CB组中的数据经过编码调制后映射至第一时频资源上，其中，第一时频资源包括n个CCU，CCU为第一时频资源中的部分时频资源，不同CCU之间没有重叠的时频资源；不同CB组中的数据被映射至不同的CCU上；不同CB组的数据在频域上有重叠且在时域上没有重叠，或者，不同CB组的数据在时域上有重叠且在频域上没有重叠；n≥m，n为整数。
第一时频资源，是本次传输过程所分配的时频资源，第一时频资源上映射的数据为本次传输过程中所传输的数据。
该m个CB组中的数据全部映射至该n个CCU上。若本次传输过程中只传输新传数据，则第一时频资源可以仅包含该n个CCU。若本次传输过程中传输新传数据和重传数据，则第一时频资源除了包含该n个CCU之外，还可以包含重传数据所占的时频资源。其中，本次传输过程中传输的重传数据所占的CCU的配置方式与本次传输过程中传输的新传数据所占的CCU的配置方式可以相同，也可以不同，具体可参考下文。
一个CB组中的数据可以被映射至一个或多个CCU上，不同CB组中的数据被映射至不同的CCU上。
不同CCU(即n个CCU中的任意两个CCU)之间的关系，包括以下3种情况中的任一种：
情况1、不同CCU在频域上有重叠，且在时域上没有重叠。如图4所示的任意两个CCU，或者，如图6所示的CCU1与CCU2。
情况2、不同CCU在时域上有重叠，且在时域上没有重叠。如图5所示的任意两个CCU，或者，如图6所示的CCU1与CCU5。
情况3、不同CCU在时域上和频域上均没有重叠。如图6所示的CCU1与CCU6等。
若n个CCU中的任意两个CCU之间的关系均满足上述情况1，即n个CCU中的任意两个CCU均在频域上有重叠且在时域上没有重叠，则由于不同CB组中的数据 被映射至不同的CCU上，因此可以实现：不同CB组的数据在频域上有重叠且在时域上没有重叠。示例1，假设一个TB被分为2个CB组，即CB组1和CB组2，那么，基于图4所示的CCU的配置方式，则每个CB组中的数据可以被映射至2个CCU上，例如CB组1被映射至CCU1和CCU2上，CB组2被映射至CCU3和CCU4上。
若n个CCU中的任意两个CCU之间的关系均满足上述情况2，即n个CCU中的任意两个CCU均满足在时域上有重叠且在频域上没有重叠，则由于不同CB组中的数据被映射至不同的CCU上，因此可以实现：不同CB组的数据在时域上有重叠且在频域上没有重叠。示例2，假设一个TB被分为2个CB组，即CB组1和CB组2，那么，基于图5所示的CCU的配置方式，则每个CB组中的数据可以被映射至1个CCU上，例如，CB组1被映射至CCU1上，CB组2被映射至CCU2上。
若n个CCU中既包含不同CCU之间的关系满足上述情况1，又包含不同CCU之间的关系满足上述情况2，还包含不同CCU之间的关系满足上述情况3，如图6所示。则可以实现：不同CB组的数据在频域上有重叠且在时域上没有重叠。例如，假设一个TB被分为2个CB组，即CB组1和CB组2，那么，基于图6所示的CCU的配置方式，则CB组1中的数据可以被映射至CCU1、CCU2、CCU5和CCU6上，CB组2中的数据可以被映射至CCU3、CCU4、CCU7和CCU8上；或者，CB组1中的数据可以被映射至CCU1、CCU3、CCU5和CCU7上，CB组2中的数据可以被映射至CCU2、CCU4、CCU6和CCU8上。也可以实现：不同CB组在时域上有重叠且在频域上没有重叠。例如，假设一个TB被分为2个CB组，即CB组1和CB组2，那么，基于图6所示的CCU的配置方式，则CB组1中的数据可以被映射至CCU1～CCU4上，CB组2中的数据可以被映射至CCU5～CCU8上。
可选的，为了更好地抗突发干扰，在将每个CB组的数据经过编码调制后映射至第一时频资源之前，可以将每个CB组包含的多个CB进行交织映射。其中，交织映射可以是频域交织映射，以保证交织后每个CB与交织前的每个CB占用相当的频域带宽，从而保证频域分集。另外，交织映射还可以是时域交织映射，以保证每个CCU内的数据在时域上尽量分布在该CCU的所有符号上。例如，假设一个CB组包括t个CB，该t个CB的数据长度为l1、l2…lt，该t个CB中的数据分为：a1,1,a1,2,...a1,l1；a2,1,a2,2,...a1,l2；.....；am,1,am,2,...a1,lt。若不采用交织映射，则发射端可以将数据a1,1,a1,2,...a1,l1；a2,1,a2,2,...a1,l2；.....；am,1,am,2,...a1,lt按照先频域后时域的顺序映射到该CB组对应的CCU上。若采用交织映射，则发射端可以先将数据a1,1,a1,2,...a1,l1；a2,1,a2,2,...a1,l2；.....；am,1,am,2,...a1,lt交织成数据a1,1,a2,1,...at,1；a1,2,a2,2,...at,1；.....；at,lt，然后将a1,1,a2,1,...at,1；a1,2,a2,2,...at,1；.....；at,lt按照先频域后时域的顺序映射到该CB组对应的CCU上。
S103：发射端发送映射至第一时频资源上的数据。
可选的，在S101之后，该方法还可以包括：发射端为每个CB组添加CRC，用于使接收端校验该CB组的数据是否成功接收。
可选的，在S101之后，无论发射端是否为每个CB组添加CRC，该方法还可以包括：发射端将每个CB组分为一个或多个CB。进一步的，还可以包括：发射端为每个CB添加CRC，用于使接收端校验该CB的数据是否成功接收。在发射端将每个CB 组分为一个或多个CB之后，无论发射端是否为每个CB添加CRC，在S102可以包括：对每个CB进行编码、速率匹配、加扰、调制、层映射和天线映射等操作。该情况下，S103可以包括：将经编码、速率匹配、加扰、调制、层映射和天线映射等操作之后的数据映射至第一时频资源上。
本发明实施例提供的数据传输方法，将TB分为m个CB组，并将该m个CB组映射至第一时频资源中的n个CCU中；然后，将映射至第一时频资源上的数据发送出去。其中，不同CCU之间没有重叠的时频资源，不同CB组中的数据被映射至不同的CCU上；并且，不同CB组中的数据在时域上没有重叠或在频域上没有重叠。这样，若不同CB组中的数据在时域上没有重叠，如上述示例1中的2个CB组，则任一个符号上受到干扰时，只会影响一个CB组的数据的正确性；与现有技术(例如上述方案1)相比，能够减少重传的CB组的数量，从而提高传输效率。若不同CB组中的数据在频域上没有重叠，如上述示例2中的2个CB组，则当本次传输所分配的频域资源中的窄带受到干扰时，不会影响到所有CB组的数据的准确性；与现有技术相比，能够减少重传的CB组的数量，从而提高传输效率，例如，与上述方案2相比，只需要重传CB组1即可，因此减少重传的CB组的数量，从而提高传输效率。
需要说明的是，按照本发明实施例提供的CCU的划分方式CB组在时频资源上的映射方式，还能够使下行控制信息(downlink control indication，DCI)设计更简洁，以及重传数据的设计更灵活(例如，可以在一次传输过程中仅传输重传数据，或者传输新传数据和重传数据)等。具体可以参考下文。
需要说明的是，考虑到接收端反馈自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)指示的开销、控制指示开销和/或CCU个数限制等因素，发射端中可以设置CB组数的最大值NGroup_max。
可选的，S102可以包括：发射端根据TB的数据长度、CB的数据长度的最大值、CB组的数据长度的最大值、CB组数的最大值和CCU的个数n中的至少一个，确定CB组数的实际值m。下面列举几种可选的方式：
方式1、发射端根据TB的数据长度TBS、CB的数据长度的最大值CBmax、CB组数的最大值NGroup_max和CCU的个数n，确定CB组数的实际值m。其中，CBmax和NGroup_max可以是预设的。
具体的，如图8所示，方式1可以包括以下步骤S11～S12：
S11：发射端根据TB的数据长度TBS和CB的数据长度的最大值CBmax，确定CB组数的参考值NGroup_re。
若不为TB添加CRC，则TB的数据长度TBS是指TB本身的数据长度。若为TB添加CRC，则TB的数据长度TBS是指TB本身的数据长度与为TB添加的CRC的大小之和。
若不为CB添加CRC，则CB的数据长度的最大值CBmax是指最大CB大小(比如，在LTE中，CBmax可以为6144bit；或者，在NR中，CBmax可以是8192bit等)；若为 CB添加CRC，则CB的数据长度的最大值CBmax是指最大CB大小减去为CB添加的CRC的大小。
具体的，发射端根据TB的数据长度TBS和CB的数据长度的最大值CBmax，确定TB所分成的CB的个数的参考值NCB_re。例如，发射端可以根据公式
Figure PCTCN2017109362-appb-000023
确定NCB_re，其中，ceil()表示向上取整；然后，根据公式
Figure PCTCN2017109362-appb-000024
确定CB组数的参考值NGroup_re，其中，NCB_min表示一个CB组中包含的CB的个数的最小值，NCB_min可以是预先设置或信令配置的，其中，信令配置可以包括通过高层信令或物理层信令动态/半静态配置，这里的高层信令可以是无线资源控制(radio resource control，RRC)层信令或媒体接入控制(medium access control，MAC)层信令等。例如，若NCB_re＝1，NCB_min＝1，则NGroup_re＝1。若NCB_re＝8，NCB_min＝1，则NGroup_re＝8。
可选的，发射端还可以通过公式
Figure PCTCN2017109362-appb-000025
确定CB组数的参考值NGroup_re，其中，NCB_perGroup表示CB组的粒度，即CB组包含的CB的个数，NCB_perGroup可以是预先设置或信令配置的，其中，信令配置可以包括通过高层信令或物理层信令动态/半静态配置。
可选的，发射端还可以通过公式
Figure PCTCN2017109362-appb-000026
确定CB组数的参考值NGroup_re，其中，NCB_max表示一个CB组中包含的CB的个数的最大值，即CB组包含的CB的个数。NCB_max可以是预先设置或信令配置的，其中，信令配置可以包括通过高层信令或物理层信令动态/半静态配置。
S12：发射端将CB组数的参考值NGroup_re、CB组数的最大值NGroup_max和CCU的个数n中的最小值，作为CB组数的实际值m。
具体的，发射端可以根据公式m＝min(NGroup_re,NGroup_max，n)，确定CB组数的实际值m。示例的，若NGroup_re＝1，NGroup_max＝4，n＝2，则m＝1。若NGroup_re＝8，NGroup_max＝4，n＝2，则m＝2。
需要说明的是，上述S11～S12合并起来即可认为是：根据公式
Figure PCTCN2017109362-appb-000027
得到CB组数的实际值m。其中，CB组min表示CB组包含的最少比特数。
方式2：发射端根据TB的数据长度TBS、CB组的数据长度的最大值CB组max、CB组数的最大值NGroup_max和CCU的个数n，确定CB组数的实际值m。其中，CB组max是指CB组包含的最多比特数，CB组max和NGroup_max可以是预先设置或信令配置的，其中，信令配置可以包括通过高层信令或物理层信令动态/半静态配置。
具体的，如图8a所示，方式2可以包括以下步骤S21～S22：
S21：发射端根据TB的数据长度TBS和CB组的数据长度的最大值CB组max，确 定CB组数的参考值NGroup_re。
其中，若不为TB添加CRC，则TB的数据长度TBS是指TB本身的数据长度LTB。若为TB添加CRC，则TB的数据长度TBS是指TB本身的数据长度LTB与为TB添加的CRC的大小TBCRC之和。也就是说，S21可以包括以下任一种：
1)若将TB分为m个CB组，且不为CB组添加CRC，则
Figure PCTCN2017109362-appb-000028
2)若将TB分为m个CB组，且为CB组添加CRC，则
Figure PCTCN2017109362-appb-000029
3)若将TB与为该TB添加的CRC分为m个CB组，且不为CB组添加CRC，则
Figure PCTCN2017109362-appb-000030
4)若将TB与为该TB添加的CRC分为m个CB组，且为CB组添加CRC，则
Figure PCTCN2017109362-appb-000031
S22：发射端将CB组数的参考值NGroup_re、CB组数的最大值NGroup_max和CCU的个数n中的最小值，作为CB组数的实际值m。
步骤S22的具体实现可参考上文S12。
方式3：发射端根据TB的数据长度TBS，确定CB组数的实际值m。可选的，发射端中可以设置一个或多个预设阈值；然后，发射端可以根据TBS和该一个或多个预设阈值确定m。示例的，若TBS≤th1，则发射端确定m＝1；若th1＜TBS≤th2，则发射端确定m＝2；若th2＜TBS≤th3，则发射端确定m＝3，……依次类推。其中，th1＜th2＜th3。
方式4：发射端根据CB组数的最大值NGroup_max确定CB组数的实际值m。可选的，发射端将NGroup_max作为CB组数的实际值m。
方式5：发射端根据CCU的个数n确定CB组数的实际值m。可选的，发射端将CCU的个数n作为CB组数的实际值m。
方式6：发射端根据TB的数据长度TBS和CB的数据长度的最大值CBmax，确定CB组数的实际值m。可选的，发射端根据TBS和CBmax，确定CB组数的参考值NGroup_re，该步骤的具体实现方式可以参考上述S11。然后，将NGroup_re作为CB组数的实际值m。
方式7：发射端根据TB的数据长度TBS和CB组的数据长度的最大值CB组max，确定CB组数的实际值m。可选的，发射端根据TBS和CB组max，确定CB组数的参考值NGroup_re，该步骤的具体实现方式可以参考上述S21。然后，将NGroup_re作为CB组数的实际值m。
方式8：发射端根据TB的数据长度TBS和CB组数的最大值NGroup_max，确定CB 组数的实际值m。可选的，发射端中可以设置一个或多个预设阈值；然后，发射端可以根据TBS、该一个或多个预设阈值，以及NGroup_max确定m。示例的，假设NGroup_max＝4，那么，若TBS≤th1，则发射端确定m＝1；若th1＜TBS≤th2，则发射端确定m＝2；若th2＜TBS≤th3，则发射端确定m＝3，若TBS＞th3，则发射端确定m＝NGroup_max＝4。其中，th1＜th2＜th3。
方式9：发射端根据TB的数据长度TBS和CCU的个数n，确定CB组数的实际值m。可选的，发射端中可以设置一个或多个预设阈值；然后，发射端可以根据TBS、该一个或多个预设阈值，以及n确定m。示例的，假设n＝4，那么，若TBS≤th1，则发射端确定m＝1；若th1＜TBS≤th2，则发射端确定m＝2；若th2＜TBS≤th3，则发射端确定m＝3，若TBS＞th3，则发射端确定m＝n＝4。其中，th1＜th2＜th3。
方式10：发射端根据TB的数据长度TBS、CB的数据长度的最大值CBmax和CB组数的最大值NGroup_max，确定CB组数的实际值m。可选的，发射端根据TBS和CBmax，确定CB组数的参考值NGroup_re，该步骤的具体实现方式可以参考上述S11。然后，将NGroup_re和NGroup_max中的最小值作为CB组数的实际值m。可选的，发射端根据TBS和CBmax，确定NCB_re，其中，关于NCB_re的相关描述可以参考上文S11；然后，根据公式m＝min(NCB_re,NGroup_max)，确定CB组数的实际值m。
方式11：发射端根据TB的数据长度TBS、CB组的数据长度的最大值CB组max和CB组数的最大值NGroup_max，确定CB组数的实际值m。可选的，发射端根据TBS和CB组max，确定CB组数的参考值NGroup_re，该步骤的具体实现方式可以参考上述S21。然后，将NGroup_re和NGroup_max中的最小值作为CB组数的实际值m。
本发明实施例提供了多种确定一个TB中包含的CB组数的实际值m的实现方式，具体可以参考具体实施方式部分“确定CB组数的实际值m”的方式1～方式11。其中，至少包括如下两类：
第一类：先根据公式
Figure PCTCN2017109362-appb-000032
确定TB所分成的CB的个数的参考值NCB_re；再确定CB组数的实际值m。如方式1、6和10。
第二类：先根据公式
Figure PCTCN2017109362-appb-000033
确定TB所分成的CB组的个数的参考值NGroup_re；再确定CB组数的实际值m。如方式2、7和11。
基于第一类方式，NCB_re可能不能被第一类方式确定的m整除，因此，不同的CB组中的CB的个数可能不同。在一种可能的设计中，该方法还可以包括：根据公式
Figure PCTCN2017109362-appb-000034
或
Figure PCTCN2017109362-appb-000035
其中
Figure PCTCN2017109362-appb-000036
表示向上取整；
Figure PCTCN2017109362-appb-000037
表示向下取整，确定每个CB组中的CB的个数C，其中，C包括C+和C-。进一步地，该方法还可以包括：根据公式N+＝NCB_re-mC-，确定具有C+个CB的CB组的组数N+；根据公式 N-＝m-N+，确定具有C-个CB的CB组的组数N-。
在该实现方式中，每个CB组中的CB的个数可能存在以下两种情况，分别标记为：C+和C-：
Figure PCTCN2017109362-appb-000038
和
Figure PCTCN2017109362-appb-000039
其中
Figure PCTCN2017109362-appb-000040
表示向上取整；
Figure PCTCN2017109362-appb-000041
表示向下取整。
可以理解的，将具有C+个CB的CB组的组数标记为N+，将具有C-个CB的CB组的组数标记为N-，则：
N+＝NCB_re-mC-，N-＝m-N+。
可选的，具有C+个CB的CB组可以是m个CB组中的前N+个CB组，此时，具有C-个CB的CB组是m个CB组中的后N-个CB组。或者，具有C+个CB的CB组可以是m个CB组中的后N+个CB组，此时，具有C-个CB的CB组是m个CB组中的前N-个CB组。具体实现时不限于此。
示例的，假设NCB_re＝15，m＝4，可以得到：C+＝4，C-＝3，N+＝3，N-＝1，即3个CB组的CB数为4，1个CB组的CB数为3。假设TB所分成的15个CB编号为0～14，则4个CB组可以为：{0,1,2,3}，{4,5,6,7}，{8,9,10,11}，{12,13,14}或者{0,1,2}，{3，4,5,6,}，{7,8,9,10}，{11,12,13,14}。
基于第二类方式，TBS可能不能被第二类方式确定的m整除，因此，不同的CB组中包含的比特数可能不同。在一种可能的设计中，该方法还可以包括：根据公式
Figure PCTCN2017109362-appb-000042
或B-＝TBS-(m-1)B+确定每个CB组中的比特数B。
在该实现方式中，每个CB组中的比特数可能存在以下两种情况，分别标记为：B+和B-：
Figure PCTCN2017109362-appb-000043
和B-＝TBS-(m-1)B+。
可选的，具有B+个比特的CB组可以是m个CB组中的前m-1个CB组，此时，具有B-个比特的CB组是m个CB组中的最后一个CB组。或者，具有B+个比特的CB组可以是m个CB组中的后m-1个CB组，此时，具有B-个比特的CB组是m个CB组中的第一个CB组。
可以理解的，若不为CB组添加CRC，则B+和B-是指CB组本身的数据长度；若为CB组添加CRC，则B+和B-是指CB组本身的数据长度与为CB组添加的CRC的大小之和。
可选的，如图9所示，在S101之前，该方法还可以包括以下步骤S100～S100a：
S100：发射端根据CB组数的实际值m和CCU的个数n，确定m个CB组中的 每个CB组与n个CCU中的每个CCU之间的映射关系。
示例的，可以根据以下公式1确定第i个CB组与CCU的个数之间的映射关系：
Figure PCTCN2017109362-appb-000044
其中，ni表示第i个CB组所映射的CCU的个数，floor()表示向下取整。
上述公式1示出了第i个CB组与CCU的个数之间的对应关系，但是，没有给出每个CB组具体与哪一个或多个CCU之间存在映射关系。本发明实施例对每个CB组具体与哪一个或多个CCU之间存在映射关系不进行限定，可选的，可以按照n个CCU的顺序依次设置每个CB组与CCU之间的映射关系。例如，第1个CB组与第1个CCU到第n1个CCU之间存在映射关系，第2个CB组与第n1+1个CCU到第n1+n2个CCU之间存在映射关系，依此类推，第m个CB组与第n1+n2+……nm-1+1个CCU到第n1+n2+……nm-1+nm个CCU之间存在映射关系。例如，在图4中，n＝4。该情况下，若m＝1，则该CB组与该4个CCU之间存在映射关系；若m＝2，则该第1个CB组与CCU1和CCU2之间存在映射关系，第2个CB组与CCU3和CCU4之间存在映射关系；若m＝4，则每个CB组按照CCU的顺序与一个CCU之间存在映射关系。
需要说明的是，本发明实施例中，根据一定的规则将CB组映射至相应的CCU上，这样，若在数据传输过程中出现干扰，则只要确定干扰所占的时频域资源，即可确定哪些CB组中的数据受到了干扰，因此相比现有技术，能够更好的进行干扰消除(interference cancelling，IC)。
S100a：发射端根据该映射关系和n个CCU中可用于传输数据的资源的大小，确定m个CB组中的每个CB组的数据长度。
其中，可用于传输数据的资源，是指除传输控制信息、GP和参考信息等非数据信息的资源后剩余的资源。
具体的，发射端可以根据以下公式2确定m个CB组中的第i个CB组的数据长度：
Figure PCTCN2017109362-appb-000045
其中，Bi表示m个CB组中的第i个CB组的数据长度，1≤i≤m，i为整数。LTB表示TB的数据长度，LTB_CRC表示为TB添加的CRC的大小，LTB_CRC≥0，SCB_i表示第i个CB组对应的CCU中可用于传输数据的资源的大小，Stotal表示n个CCU中可用于传输数据的资源的大小，floor()表示向下取整。
需要说明的是，上述公式2中的LTB_CRC≥0，说明：发射端可以将TB分为m个CB组，也可以在为TB添加CRC之后，再分为m个CB组。
示例的，上述公式2中的
Figure PCTCN2017109362-appb-000046
具体可以为：
Figure PCTCN2017109362-appb-000047
或
Figure PCTCN2017109362-appb-000048
等。其中，REi表示第i个CB组对应的CCU中可用于传输数据的RE的个数，REtotal表示n个CCU中可用于传输数据的RE的个数。Symi表示第i个CB组对应的CCU中可用于传输数据的符号的个数，Symtotal表示n个CCU中可用于传输数据的符号的个数。
需要说明的是，按照S100～S100a中的具体示例确定每个CB组的数据长度，能够尽可能保证m个CB组中的数据尽量均匀地分布在n个CCU上，从而使得每个CB组经编码和速率匹配后的码率基本一致，便于自适应调制编码(adaptive modulation and coding，AMC)正常工作。
可选的，如图9所示，在S101之后，该方法还可以包括以下步骤S101a：
S101a：发射端将每个CB组中的数据分成C个CB。
具体的，当每个CB都添加CRC时，C＝ceil(B/(CBmax-CBCRC)。当每个CB都不添加CRC时，C＝ceil(B/CBmax)。其中，ceil()表示向上取整，B表示CB组的数据长度，CBmax表示CB的数据长度的最大值，CBCRC表示为CB添加的CRC的大小。
其中，若不为CB组添加CRC，则CB组的数据长度B是指CB组本身的数据长度LCB组。若为CB组添加CRC，则CB组的数据长度B是指CB组本身的数据长度LCB组与为CB组添加的CRC的大小CB组CRC之和。也就是说，该可选的实现方式可以包括以下任一种：
1)、若将CB组分为C个CB，且不为CB添加CRC，则
Figure PCTCN2017109362-appb-000049
2)、若将CB组分为C个CB组，且为CB添加CRC，则
Figure PCTCN2017109362-appb-000050
3)、若将CB组与为该CB组添加的CRC分为C个CB，且不为CB添加CRC，则
Figure PCTCN2017109362-appb-000051
4)、若将CB组与为该CB组添加的CRC分为C个CB，且为CB组添加CRC，则
Figure PCTCN2017109362-appb-000052
需要说明的是，具体实现时，上文所示的将TB分为m个CB组的方法，将CB组分为C个CB的方法，m个CB组与n个CCU之间的映射关系等均可以是发射端和接收端预先约定好的，也就是说，发射端不需要向接收端指示这些信息。另外，第一时频资源上传输的数据属于哪个TB和/或哪个CB组等信息可以是发射端和接收端预先约定好的，为了增强通信的鲁棒性，该信息也可以是发射端指示给接收端的。
上文描述了发射端向接收端发送数据的方法，具体实现时，发射端除了向接收端发送按上述步骤处理后的数据外，还需要向接收端发送DCI。其中，DCI用于指示接收端如何处理接收到的数据。本发明实施例提供了DCI的设计方法，具体的，DCI可以包括以下信息：
1)、调制和编码方式(modulation and coding scheme，MCS)指示，用于指示 本次传输的数据所采用的MCS。具体实现时，DCI中可以包含1份MCS，来指示第一时频资源上承载的数据所采用的MCS。可选的，为了增强通信的灵活性和鲁棒性，也可以使用多份MCS指示来指示本次传输的数据所采用的MCS，其中，每份用于指示一个CCU上映射的数据所采用的MCS，或指示一个CB组的数据所采用的MCS。
需要说明的是，上述1)中是将调制方式和编码方式统称为MCS，并使用一个MCS指示指示一种调制方式和编码方式。具体实现时，也可以独立指示调制方式和编码方式，例如，使用1份或N份调制方式指示来指示本次传输的数据所采用的调制方式，和/或，使用1份或N份编码方式来指示本次传输的数据所采用的编码方式。
2)、传输冗余信息指示，用于指示本次传输的数据所采用的传输冗余信息。其中，该传输冗余信息指示与发射端编码时所采用的编码算法有关，该编码算法可以包括但不限于turbo编码算法或低密度奇偶校验(low-density parity-check，LDPC)编码算法等。示例的，当该编码算法是turbo编码算法时，传输冗余信息指示具体可以是冗余版本(redundancy version，RV)。当该编码算法是LDPC编码算法时，传输冗余信息指示具体可以是指示LDPC编码重传增量冗余(incremental redundancy，IR)合并的相关信息。下文中均以传输冗余信息指示是RV为例进行说明。
具体实现时，可以使用1份RV来指示第一时频资源上承载的数据所采用的RV。可选的，为了增强通信的灵活性和鲁棒性，也可以使用多份RV来指示本次传输的数据所采用的RV，其中，每份用于指示一个CCU上映射的数据所采用的RV，或指示一个CB组的数据所采用的RV。
3)、新传数据指示(new data indicator，NDI)，用于指示第一时频资源上映射的数据是新传数据还是重传数据。本发明实施例中可以将NDI设置为1份或N份，其中，N份NDI即N比特，其中，N可以是第一时频资源包括的CCU的个数，也可以是CB组数的最大值或CB组数的实际值m。若N是第一时频资源包括的CCU的个数，则每bit指示对应CCU上映射的数据是新传数据还是重传数据。若N是CB组数的最大值或CB组数的实际值m，则每bit指示对应CB组的数据是新传数据还是重传数据。
需要说明的是，若本次传输过程只传输重传数据，则NDI中表示新传数据的信息无意义，比如可用于代表对应的CB组不在该次调度的资源上重传。可以理解的，用于表示此含义的信息不限定为NDI，只要表示此含义的信息的功能与NDI的功能相同即可。若本次传输过程传输新传数据和重传数据，则NDI中表示新传数据和重传数据的信息均有意义。
可选的，DCI中还可以包含用于在指示第一时频资源上传输的数据属于哪个TB和/或哪个CB组的信息。这样，能够增强通信的鲁棒性。
另外需要说明的是，上文中均是以本次传输过程中传输1个TB的数据为例进行说明的，实际实现时，一次传输过程中也可以传输多个TB的数据，该多个TB的数据复用相同的时频资源。在本发明实施例中，多个TB(例如2个TB)或多个CB组(或2个CB组)可以通过频分复用(frequency division multiplexing，FDM)或者时分复用(time division multiplexing，DMT)方式复用，即映射到频域上不同的CCU上或者映射到时域上不同的CCU上。因此，可选的，DCI中可以添加资源映射方式指示， 用于指示两码字的复用映射方式是空分、频分还是时分等。可选的，后续的ACK/NACK反馈都与LTE兼容，或重用LTE的设计(例如2TB或2CB组独自反馈、独自调度、各自对应一份NDI、RV或MCS等)。
可选的，当本发明实施例提供的技术方案应用于多输入多输出(multiple-input multiple-output，MIMO)系统中时，一次传输过程中传输的多个TB空分复用时，发射端可以对该多个TB中的每个TB独立操作，即：该多个TB中的每个TB均按照本申请提供的技术方案进行数据传输。发射端也可以对该多个TB进行联合操作，例如，可以根据该多个TB中数据长度最大或最小的TB，确定统一的分组方式。例如，可以根据该多个TB中数据长度最大或最小的TB，确定CB组数的实际值m的过程中的TBS等。
如图10所示，是本发明实施例提供的另一种数据传输的流程示意图。该可选的实现方式中的相关内容的解释可以参考上文。该方法可以包括以下步骤S201～S204：
S201：接收端接收控制信息；其中，控制信息中包括TB的信息。
其中，控制信息可以是DCI。其中，DCI的设计方式可以参考上文。TB的信息包括TB的数据长度。可选的，TB的信息还可以包括以下信息中的至少一种：TB所分成的CB组的实际值m，TB所映射的CCU的个数，将TB分为m个CB组的分配规则，将CB组分为CB的分配规则，至少一个CB组与其所映射的CCU的标识，CCU的配置方式等。
S202：接收端接收映射至第一时频资源上的TB。其中，第一时频资源包括n个CCU，CCU为第一时频资源中的部分时频资源，不同CCU之间没有重叠的时频资源；TB包括m个CB组，m个CB组中的每一个CB组包括至少一个CB，不同CB组中的数据被映射至不同的CCU上；不同CB组的数据在频域上有重叠且在时域上没有重叠，或者，不同CB组的数据在时域上有重叠且在频域上没有重叠；m≥2，m为整数，n≥m，n为整数。
可选的，TB的信息包括TB的数据长度，在S201之后，该方法还可以包括：接收端根据所述TB的数据长度、CB的数据长度的最大值、CB组数的最大值和所述CCU的个数n，确定CB组数的实际值m。
S203：接收端确定m个CB组中的每个CB组与n个CCU中的每个CCU之间的映射关系。
具体可以包括：接收端根据所述CB组数的实际值m和所述CCU的个数n，确定所述m个CB组中的每个CB组与所述n个CCU中的每个CCU之间的映射关系。该实现方式的相关解释可以参考上文。
S204：接收端根据该映射关系从第一时频资源中获取m个CB组，并将该m个CB组的数据经过解调译码后进行级联生成一个TB的数据。
可选的，在S203之后，S204之前，该方法还可以包括：接收端根据该映射关系和n个CCU中可用于传输数据的资源的大小，确定m个CB组中的每个CB组的数据长度。该可选的实现方式的相关解释可以参考上文，此处不再赘述。
可选的，在S204之后，该方法还可以包括：接收端将每个CB组中的数据分成C个CB，具体实现方式可以参考上文，此处不再赘述。
该实施例提供的技术方案的有益效果可以参考上文，此处不再赘述。
S204中的“接收端根据该映射关系从第一时频资源中获取m个CB组”可以认为是资源逆映射的过程。接收端将该m个CB组的数据经过解调译码后进行级联生成一个TB的数据，可以包括：接收端根据DCI中包括的解扰、解调、速率匹配逆操作、译码，然后将译码得到的数据进行级联生成一个TB的数据。
可选的，该方法还可以包括：接收端在对该m个CB组的数据进行译码之后，进行CRC校验等操作。进一步可选的，该方法还可以包括：以下步骤S1～S2：
S1：接收端根据第一时频资源上映射的CB组数向发射端反馈多个bit的ACK/NACK；bit数可以是系统设置的固定值，其中，该固定值可以是大于或等于CB组数的最大值的一个值，也可以是根据TBS或MCS等信息，相应动态调整为CB组数的实际值m。每个bit用于指示对应的CB组中的数据是否校验正确。
示例的，若每个CB均添加有CRC，且每个CB组均添加有CRC，则当一个CB组中的所有CB的CRC均校验正确，且该CB组的CRC校验正确时，接收端在该CB组对应的bit上反馈ACK，否则反馈NACK。若每个CB均添加有CRC，且CB组没有添加CRC，则当一个CB组中的所有CB的CRC均校验正确时，接收端在该CB组对应的bit上反馈ACK，否则反馈NACK。
S2：发射端接收接收端发送的ACK/NACK反馈。
需要说明的是，下文中仅对接收端对CB组的CRC校验进行了说明，具体实现时，该方法还可以包括：接收端对每个CB的CRC和/或TB的CRC进行校验。其具体实现过程可以参考现有技术，此处不再赘述。
具体实现时，若发射端接收到的ACK/NACK反馈中全部是ACK，则按照上文提供的数据传输方法继续向接收端传输下一个TB的数据。若发射端接收到的ACK/NACK反馈中包含NACK，则可以按照下文提供的重传处理过程，向接收端重传NACK对应的CB组的数据。
下面说明本发明实施例提供的发送端重传数据的过程，具体可以包括以下两种情况：
第一种：一次传输过程中只传输重传数据。
如图11所示，为一种传输过程的示意图。图11中的(a)所示的时频资源表示第一次传输过程中所分配的时频资源，该时频资源在时域上为1slot，该slot为7个符号。该时频资源被分为CCU1～CCU4。第一次传输过程中传输的数据是新传数据TB，TB被分为CB组1～CB组4。每个CB组按照CCU组的顺序依次被映射至一个CCU上。假设第一传输过程中，接收端向发射端反馈的ACK/NACK中指示CB2和CB4中的数据需要重传，那么，在第二次传输过程中，可以将CB2和CB4中的数据按照CCU组的顺序依次分别映射至2个CCU上，即CB2中的数据被映射至CCU1和CCU2上，CB4中的数据被映射至CCU3和CCU4上，如图11中的(b)所示。
需要说明的是，重传过程中的CCU配置规则，以及重传的CB组与CCU之间的映射关系等均可以是发射端和接收端预先约定好的，因此发射端不需要向接收端指示。为了增加通信的灵活性和鲁棒性，在重传过程中，也可以在DCI中指示重传的每个 CB组与CCU之间的映射关系。
可选的，也可以按需分配重传资源。如上述例子，接收端向发射端反馈的ACK/NACK中指示CB2和CB4中的数据需要重传，则在第二次传输过程中，发送端只分配CCU2和CCU4，其中，CCU2用于重传CB2中的数据，CCU4用于重传CB4中的数据。该实现方式中，重传的数据所占用的资源可以与初传时所占用的资源相同，例如，重传的数据所占用的CCU与初传时所占用的CCU的数量和/或位置相同。这样可以节省控制信令指示开销。
另外需要说明的是，为了兼容Rateless传输方式，可以在DCI中增加重传的CB组数指示。具体实现时，假设一次重传过程中的NDI指示了初传的两个CB组的数据需要重传，但是，DCI中的重传的CB组数指示为1组，那么隐含将NDI中指示的两个CB组合并为一个CB组。另外，重传的过程中，RB可能为自适应减小。
第二种：一次传输过程中传输重传数据和新传数据
可选的，本次传输过程中重传数据所映射的时频资源的位置，与传输该重传数据对应的新传数据时所映射的时频资源的位置相同。这样，发射端不需要向接收端指示重传数据所占的时频资源的位置。当然，具体实现时，本次传输过程中重传数据所映射的时频资源的位置，与传输该重传数据对应的新传数据时所映射的时频资源的位置也可以不同，该情况下，发射端需要向接收端指示重传数据所占的时频资源的位置。
如图12所示，为一种传输过程的示意图。假设每次输过程中所分配的时频资源在时域上为1slot，该slot包括7个符号；且每次输过程中所分配的时频资源被分为4个CCU，即CCU1～CCU4；其中前3个CCU中的每个CCU包括2个符号，最后一个CCU包括1个符号。那么：
在第一次传输过程中，传输新传数据TB1，发射端可以根据CCU1～CCU4的大小确定TB1的大小，然后根据TB1的大小和上文提供的方法将TB1分为4个CB组，标记为CB组1.1～CB组1.4；接着，将每个CB组按照CCU组的顺序依次被映射至一个CCU中，如图12中的(a)所示。若第一传输过程中，接收端向发射端反馈的ACK/NACK中指示CB1和CB3中的数据需要重传，则：
在第二次传输过程中，传输重传数据和新传数据TB2，发射端可以根据可用CCU(即CCU2和CCU4)确定新传数据TB2的大小，然后根据TB2的大小和上文提供的方法将TB2分为1个CB组，标记为CB组2.1；接着，将该CB组映射至CCU1和CCU3中，如图12中的(b)所示。若第一传输过程中，接收端向发射端反馈的ACK/NACK中指示CB1和CB3中的数据需要重传。
关于发送端重传数据的过程，需要说明以下几点：
第一，上述实施例中，当多个CB组中的数据需要重传时，发射端在一次传输过程中重传该多个CB组中的数据。实际实现时，也可以在多次传输过程中重传该多个CB组中的数据，该情况下，可选的，可以在每次传输过程中在DCI中指示当前重传的CB组的信息，其中，当前重传的CB的信息可以包括以下信息中的至少一种：该CB组的标识，该CB组所属的TB的标识。
第二，上述实施例中，当发射端确定需要重传CB组时，重传整个CB组的数据。实际实现时，在数据传输的过程中，假设一个CB组中的部分数据受到干扰，则发射 端可以根据干扰(例如如图2所示的虚线框1所示的干扰，或者虚线框2所示的干扰)的特征，在需要重传的CB组中，选择受干扰的一个或多个符号/min-slot/slot上映射的数据进行重传，或者，选择受干扰的一个或多个RB上映射的数据进行重传，或者，选择受干扰的一个或多个CCU上映射的数据进行重传等。该实现方式考虑针对性的重传，相比重传CB组中的数据来说，重传过程的调度粒度更小，因此可以进一步提高传输效率。可选的，为了保证通信的鲁棒性，可以在DCI中增加重传数据的资源分配指示和所重传的数据的信息(例如，所重传的数据是初传过程中的那些符号/min-slot/slot/RB/CCU上的数据)等。
如图12a所示，为本发明实施例提供的一种数据传输方法的交互示意图。图12a所示的方法包括以下步骤S301～S305：
S301：发射端将TB分为m个CB组，每个CB组包括至少一个CB。
S302：发射端将m个CB组中的数据经过编码调制后映射至第一时频资源上。
S303：发射端发送映射至第一时频资源上的数据，以及控制信息，其中控制信息中包括该TB的信息。
S304：接收端接收控制信息和映射至第一时频资源上的数据。其中，该控制信息可以用于接收端确定m的值。
S305：接收端从第一时频资源中获取该m个CB组，并将该m个CB组的数据经过解调译码后进行级联生成一个TB的数据。
关于发射端和接收端确定m的方法，将CB组分为CB的方法，传输多个TB的方法等等均可以参考上文，此处不再赘述。
该技术方案中，将一个TB分为了多个CB组，每个CB组包括至少一个CB组，这样，接收端若确定一个CB组或一个CB组中的一个或多个CB的数据传输失败，则发射端只需重传该CB组的数据即可，从而可以节省资源，提高传输效率。
上述主要从各网元之间交互的角度对本发明实施例提供的方案进行了介绍。可以理解的是，各网元例如发射端、接收端等为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的模块及算法步骤，本发明能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
本发明实施例可以根据上述方法示例对发射端和接收端进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本发明实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用各个功能划分的各个功能模块的情况下，图13示出了上述实施例中所涉及的数据传输装置130的一种可能的结构示意图。该数据传输装置130可以是上文中的发射端。该数据传输装置130可以包括：划分模块1301、映射模块1302和发送模块1303。可选的，还可以包括：确定模块1304。这各功能模块中的每个功能模块所具 有的功能可以根据上文所提供的各方法实施例中的各步骤推断出来，或者可以参考上文发明内容部分所提供的内容，此处不再赘述。
在采用集成的模块的情况下，上述划分模块1301、映射模块1302和确定模块1304可以集成为数据传输装置中的一个处理模块。另外，数据传输装置中还可以包括接收模块和存储模块。发送模块1303和接收模块可以集成为数据传输装置中的一个通信模块。
如图14所示，为本发明实施例提供的一种数据传输装置140的结构示意图。该数据传输装置140可以是上文中的发射端。该数据传输装置140可以包括：处理模块1401和通信模块1402。处理模块1401用于对数据传输装置140的动作进行控制管理，例如，处理模块1401用于支持数据传输装置140执行图7、图8、图8a和图9中的S101和S102，图9中的S100和S100a，以及图12a中的S301和S302等，和/或用于支持本文所描述的技术的其它过程。通信模块1402用于支持数据传输装置140与其他网络实体的通信，例如与接收端的通信等，例如，支持数据传输装置140执行图7、图8、图8a和图9中的S103，以及图12a中的S303等，和/或用于支持本文所描述的技术的其它过程。可选的，数据传输装置140还可以包括：存储模块1403，用于数据传输装置140执行上文所提供的任一数据传输方法所对应的程序代码和数据。
其中，处理模块1401可以是处理器或控制器。通信模块1402可以是收发器、收发电路或通信接口等。存储模块1403可以是存储器。
当处理模块1401为处理器，通信模块1402为收发器，存储模块1403为存储器时，本发明实施例所涉及的数据传输装置140可以如图15所示。
如图15所示，是本发明实施例提供的一种数据传输装置150的结构示意图。该数据传输装置150包括：处理器1501、存储器1502、系统总线1503以及通信接口1504。其中，处理器1501、存储器1502以及通信接口1504通过系统总线1503连接。存储器1502用于存储计算机执行指令，当数据传输装置150运行时，处理器1501执行存储器1502存储的计算机执行指令，以使数据传输装置150执行本发明实施例提供的任意一种数据传输方法。具体的数据传输方法可参考上文及附图中的相关描述，此处不再赘述。
本发明实施例还提供一种存储介质，该存储介质可以包括存储器1502。
处理器1501可以是一个处理器，也可以是多个处理元件的统称。例如，处理器1501可以是中央处理器(central processing unit，CPU)，通用处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。处理器1501还可以为专用处理器，该专用处理器可以包括基带处理芯片、射频处理芯片等中的至少一个。进一步地，该专用处理器还可以包括具有数据传输装置140其他专用处理功能的芯片。
存储器1502可以包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器1502也可以包括非易失性存储器 (non-volatile memory)，例如只读存储器(read-only memory，ROM)，快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器1502还可以包括上述种类的存储器的组合。
系统总线1503可以包括数据总线、电源总线、控制总线和信号状态总线等。本实施例中为了清楚说明，在图15中将各种总线都示意为系统总线1503。
通信接口1504具体可以是数据传输装置140上的收发器。该收发器可以为无线收发器。例如，无线收发器可以是数据传输装置140的天线等。处理器1501通过通信接口1504与其他设备，例如与基站之间进行数据的收发。
在具体实现过程中，上文中提供的任意一种数据传输方法流程中的各步骤均可以通过硬件形式的处理器1501执行存储器1502中存储的软件形式的计算机执行指令实现。为避免重复，此处不再赘述。
在采用各个功能划分的各个功能模块的情况下，图16示出了上述实施例中所涉及的数据传输装置160的一种可能的结构示意图。该数据传输装置16可以是上文中的接收端。该数据传输装置160可以包括：接收模块1601、确定模块1602和获取模块1603。可选的，还可以包括：划分模块1604。这各功能模块中的每个功能模块所具有的功能可以根据上文所提供的各方法实施例中的各步骤推断出来，或者可以参考上文发明内容部分所提供的内容，此处不再赘述。
在采用集成的模块的情况下，上述确定模块1602、获取模块1603和划分模块1604可以集成为数据传输装置中的一个处理模块。另外，数据传输装置中还可以包括发送模块和存储模块。接收模块1601和发送模块可以集成为数据传输装置中的一个通信模块。
如图17所示，为本发明实施例提供的一种数据传输装置170的结构示意图。该数据传输装置170可以包括：处理模块1701和通信模块1702。处理模块1701用于对数据传输装置170的动作进行控制管理，例如，处理模块1701用于支持数据传输装置170执行图10中的S203和S204，以及图12a中的S305，和/或用于支持本文所描述的技术的其它过程。通信模块1702用于支持数据传输装置170与其他网络实体的通信，例如与发射端的通信等，例如，通信模块1702用于支持数据传输装置170执行图12a中的S304，和/或用于支持本文所描述的技术的其它过程。可选的，数据传输装置170还可以包括：存储模块1703，用于存储数据传输装置170执行上文所提供的任一数据传输方法所对应的程序代码和数据。
其中，处理模块1701可以是处理器或控制器。通信模块1702可以是收发器、收发电路或通信接口等。存储模块1703可以是存储器。
当处理模块1701为处理器，通信模块1702为收发器，存储模块1703为存储器时，本发明实施例所涉及的数据传输装置170可以如图18所示。
如图18所示，是本发明实施例提供的一种数据传输装置180的结构示意图。该数据传输装置180可以是上文中的接收端。该数据传输装置180可以包括：处理器1801、存储器1802、系统总线1803以及通信接口1804。其中，处理器1801、存储器1802以及通信接口1804通过系统总线1803连接。存储器1802用于存储计算机执行指令，当数据传输装置180运行时，处理器1801执行存储器1802存储的计算机 执行指令，以使数据传输装置180执行本发明实施例提供的任意一种数据传输方法。具体的数据传输方法可参考下文及附图中的相关描述，此处不再赘述。
本发明实施例还提供一种存储介质，该存储介质可以包括存储器1802。处理器1801可以是一个处理器，也可以是多个处理元件的统称。例如，处理器1801可以为CPU。处理器1801也可以为其他通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。处理器1801还可以为专用处理器，该专用处理器可以包括基带处理芯片、射频处理芯片等中的至少一个。进一步地，该专用处理器还可以包括具有数据传输装置180其他专用处理功能的芯片。
存储器1802可以包括易失性存储器，例如RAM；存储器1802也可以包括非易失性存储器，例如ROM，flash memory，HDD或SSD；存储器1802还可以包括上述种类的存储器的组合。
系统总线1803可以包括数据总线、电源总线、控制总线和信号状态总线等。本实施例中为了清楚说明，在图18中将各种总线都示意为系统总线1803。
通信接口1804具体可以是数据传输装置180上的收发器。该收发器可以为无线收发器。例如，无线收发器可以是数据传输装置180的天线等。处理器1801通过通信接口1804与其他设备，例如与发射端之间进行数据的收发。
在具体实现过程中，上文中提供的任意一种数据传输方法流程中的各步骤均可以通过硬件形式的处理器1801执行存储器1802中存储的软件形式的计算机执行指令实现。为避免重复，此处不再赘述。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本发明所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (32)

  1. 一种数据传输方法，其特征在于，包括：
    接收控制信息和映射至第一时频资源上的传输块TB的数据；
    获取所述TB中的m个编码块CB组，将所述m个CB组的数据经过解调译码后进行级联生成一个TB的数据，其中，m为正整数，m＝min(NCB_re,NGroup_max)，所述NCB_re为所述TB中的CB的个数，所述NGroup_max为CB组数的最大值，所述m个CB组中的每一个CB组包括至少一个CB，所述NCB_re为根据所述TB的大小TBS和CB的数据长度的最大值确定的。
  2. 根据权利要求1所述的方法，其特征在于，所述m个CB组中每一个CB组中的CB个数为C+或C-，其中，
    Figure PCTCN2017109362-appb-100001
  3. 根据权利要求2所述的方法，其特征在于，所述m个CB组中，前N+个CB组中每一个CB组包括C+个CB，后N-个CB组中每一个CB组包括C-个CB，并满足如下关系：N+＝NCB_re-mC-，N-＝m-N+。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述控制信息包括一份冗余版本RV，所述RV用于指示所述TB所采用的RV。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述控制信息包括NGroup_max比特信息，所述NGroup_max比特信息用于指示所述m个CB组中的每一个CB组的数据是否重传。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，所述方法还包括：
    反馈NGroup_max个比特的肯定应答/否定应答ACK/NACK。
  7. 根据权利要求1至6任一项所述的方法，其特征在于，所述NGroup_max个比特中的每个比特用于指示对应的CB组中的数据是否校验正确。
  8. 一种数据传输方法，其特征在于，包括：
    将传输块TB的m个编码块CB组中的部分或全部CB组的数据经过编码调制后映射到第一时频资源上，其中，m为正整数，所述m个CB组中的每一个CB组包括至少一个CB，m＝min(NCB_re,NGroup_max)，所述NCB_re为所述TB中的CB个数，所述NGroup_max为CB组数的最大值，所述NCB_re为根据所述TB的大小TBS和CB的数据长度的最大值确定的；
    发送控制信息以及所述第一时频资源上的数据，其中，所述控制信息包括所述TB的信息。
  9. 根据权利要求8所述的方法，其特征在于，所述m个CB组中每一个CB组中的CB个数为C+或C-，其中，
    Figure PCTCN2017109362-appb-100002
  10. 根据权利要求9所述的方法，其特征在于，所述m个CB组中，前N+个CB组中每一个CB组包括C+个CB，后N-个CB组中每一个CB组包括C-个CB，并满足如下关系：N+＝NCB_re-mC-，N-＝m-N+。
  11. 根据权利要求8至10任一项所述的方法，其特征在于，所述控制信息包括一份冗余版本RV，所述RV用于指示所述TB所采用的RV。
  12. 根据权利要求8至11任一项所述的方法，其特征在于，所述控制信息包括NGroup_max比特信息，所述NGroup_max比特信息用于指示所述m个CB组中的每一个CB组的数据是否重传。
  13. 根据权利要求8至12任一项所述的方法，其特征在于，所述方法还包括：
    接收NGroup_max个比特的ACK/NACK。
  14. 根据权利要求8至13任一项所述的方法，其特征在于，所述NGroup_max个比特中的每个比特用于指示对应的CB组中的数据是否校验正确。
  15. 一种通信装置，其特征在于，包括：
    接收模块，用于接收控制信息和映射至第一时频资源上的传输块TB的数据；
    处理模块，用于获取所述TB中的m个编码块CB组，将所述m个CB组的数据经过解调译码后进行级联生成一个TB的数据，其中，m为正整数，m＝min(NCB_re,NGroup_max)，所述NCB_re为所述TB中的CB的个数，所述NGroup_max为CB组数的最大值，所述m个CB组中的每一个CB组包括至少一个CB，所述NCB_re为根据所述TB的大小TBS和CB的数据长度的最大值确定的。
  16. 根据权利要求15所述的装置，其特征在于，所述m个CB组中每一个CB组中的CB个数为C+或C-，其中，
    Figure PCTCN2017109362-appb-100003
  17. 根据权利要求16所述的装置，其特征在于，所述m个CB组中，前N+个CB组中每一个CB组包括C+个CB，后N-个CB组中每一个CB组包括C-个CB，并满足如下关系：N+＝NCB_re-mC-，N-＝m-N+。
  18. 根据权利要求15至17任一项所述的装置，其特征在于，所述控制信息包括一份冗余版本RV，所述RV用于指示所述TB所采用的RV。
  19. 根据权利要求15至18任一项所述的装置，其特征在于，所述控制信息包括NGroup_max比特信息，所述NGroup_max比特信息用于指示所述m个CB组中的每一个CB组的数据是否重传。
  20. 根据权利要求15至19任一项所述的装置，其特征在于，所述装置还包括：
    发送模块，用于反馈NGroup_max个比特的肯定应答/否定应答ACK/NACK。
  21. 根据权利要求15至20任一项所述的装置，其特征在于，所述NGroup_max个比特中的每个比特用于指示对应的CB组中的数据是否校验正确。
  22. 一种通信装置，其特征在于，包括：
    处理模块，用于将传输块TB的m个编码块CB组中的部分或全部CB组的数据经过编码调制后映射到第一时频资源上，其中，m为正整数，所述m个CB组中的每一个CB组包括至少一个CB，m＝min(NCB_re,NGroup_max)，所述NCB_re为所述TB中的CB个数，所述NGroup_max为CB组数的最大值，所述NCB_re为根据所述TB的大小TBS和CB的数据长度的最大值确定的；
    发送模块，用于发送控制信息以及所述第一时频资源上的数据，其中，所述控制信息包括所述TB的信息。
  23. 根据权利要求22所述的装置，其特征在于，所述m个CB组中每一个CB组中的CB个数为C+或C-，其中，
    Figure PCTCN2017109362-appb-100004
  24. 根据权利要求23所述的装置，其特征在于，所述m个CB组中，前N+个CB组中每一个CB组包括C+个CB，后N-个CB组中每一个CB组包括C-个CB，并满足如下关系：N+＝NCB_re-mC-，N-＝m-N+。
  25. 根据权利要求22至24任一项所述的装置，其特征在于，所述控制信息包括一份冗余版本RV，所述RV用于指示所述TB所采用的RV。
  26. 根据权利要求22至25任一项所述的装置，其特征在于，所述控制信息包括NGroup_max比特信息，所述NGroup_max比特信息用于指示所述m个CB组中的每一个CB组的数据是否重传。
  27. 根据权利要求22至26任一项所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收NGroup_max个比特的ACK/NACK。
  28. 根据权利要求22至27任一项所述的装置，其特征在于，所述NGroup_max个比特中的每个比特用于指示对应的CB组中的数据是否校验正确。
  29. 一种通信装置，其特征在于，包括：处理器、存储器和收发单元，其中，所述存储器用于存储计算机程序或指令，所述处理器用于执行所述存储器存储的计算机程序或指令，以控制所述收发单元进行信息和数据的接收和发送，当所述处理器执行所述存储器存储的计算机程序或指令时，所述通信装置用于完成如权利要求1至14任一项所述的方法。
  30. 根据权利要求29所述的通信装置，其特征在于，所述收发单元为收发器或输入输出接口。
  31. 一种计算机可读存储介质，其特征在于，用于存储计算机软件指令，所述计算机软件指令用于执行如权利要求1至14任一项所述的方法。
  32. 一种计算机程序产品，其特征在于，当其在计算机上运行时，使得计算机执行如权利要求1至14任一项所述的方法。
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