WO2016045391A1 - 一种数据传输方法及装置 - Google Patents

一种数据传输方法及装置 Download PDF

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Publication number
WO2016045391A1
WO2016045391A1 PCT/CN2015/078886 CN2015078886W WO2016045391A1 WO 2016045391 A1 WO2016045391 A1 WO 2016045391A1 CN 2015078886 W CN2015078886 W CN 2015078886W WO 2016045391 A1 WO2016045391 A1 WO 2016045391A1
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code block
code
blocks
bits
block sets
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PCT/CN2015/078886
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English (en)
French (fr)
Inventor
许进
徐俊
戴博
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中兴通讯股份有限公司
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Priority to US15/514,112 priority Critical patent/US10469212B2/en
Priority to EP15844915.7A priority patent/EP3200371A4/en
Publication of WO2016045391A1 publication Critical patent/WO2016045391A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0064—Concatenated codes
    • H04L1/0065—Serial concatenated codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • 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]
    • H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0064—Concatenated codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0076—Distributed coding, e.g. network coding, involving channel coding

Definitions

  • This document relates to the field of mobile communications, and in particular, to a data transmission method and apparatus.
  • the physical layer data sharing channel is based on a transport block (TB) as a basic unit for data transmission.
  • TB transport block
  • the receiving end determines whether the current TB is correctly received through the cyclic redundancy check code (CRC) of the TB. If the TB is correctly received, the receiving end feeds back the ACK message to the transmitting end. If the TB does not receive the TB correctly, the receiving end feeds back the NACK message to the transmitting end. After receiving the NACK message, the sender will retransmit the data to the receiver, and the retransmission will still be performed in TB.
  • CRC cyclic redundancy check code
  • the transmitting end When the transport block (TB) block size exceeds a specified threshold, the transmitting end usually performs code block (CB) splitting, and divides the TB into multiple CBs, and each CB performs coding, rate matching, and code block cascading operations, respectively. Then send it to the receiver.
  • CB code block
  • Each CB adds a CRC before encoding, and each TB also has a CRC.
  • the length of both CRCs is 24 bits, and the CB CRC is used for early termination of decoding.
  • the CB CRC can also check the correctness of the code block. If the CB CRC check passes, it indicates that the CB is the correct CB. If the CB CRC check fails, the CB is the wrong CB.
  • the TB CRC is used to verify the correctness of the received TB.
  • the TB CRC fails to pass the check at the receiving end, it indicates that the TB receives an error and needs to retransmit the TB block.
  • the resources used for retransmission are relatively large. For example, as shown in Figure 1, a TB contains 8 CBs, and only CB2 and CB5 decoding errors are made for the first transmission.
  • ACK/NACK feedback if based on CB feedback, the overhead of uplink ACK/NACK feedback is too large.
  • Packet coding is a coding technique between packets, that is, by encoding multiple source packets.
  • the process of generating a check packet As shown in FIG. 2, the process of generating a check sequence at a corresponding position in the check data packet from the information sequence at the corresponding position in the source data packet is packet coding.
  • Each check packet contains data at a corresponding location in one or more check sequences.
  • the method of packet coding may be various.
  • the verification data packet may be generated by XORing multiple source data packets, or the verification data packet may be generated by Reed Solomon coding, or may be passed through a fountain code or
  • the network coding method generates a verification data packet.
  • a rate-matched coded bit sequence needs to be modulated into a digital baseband signal for transmission.
  • the modulation constellations commonly used in LTE systems are BPSK, QPSK, 16QAM, 64QAM, and the like.
  • these modulation constellations one or more finite discrete constellation points are used to represent the amplitude and phase of the digital baseband signal, and the geometric distance between the constellation points is called the Euclidean distance, if between adjacent constellation points If the Euclidean distances are equal and each constellation point is evenly distributed in the constellation diagram, the modulation constellation is said to be a uniform constellation.
  • QPSK, 16QAM, 64QAM and other modulation constellations used in the LTE system are uniform constellations.
  • the constellation is said to be a non-uniform constellation.
  • the data retransmission of the physical layer is based on the entire transport block, that is, if at least one of the transport block signals transmitted for the first time receives an error, the entire transport block is retransmitted when retransmitting, the first pass
  • the correct code block retransmission is received, it still needs to be transmitted, which is obviously disadvantageous for the utilization of the spectrum resources at the time of retransmission. If you want to improve the efficiency of retransmission, an easy way to think of is that the receiver will feed back each code block, so that the sender only uses the retransmission to receive the wrong code block, but this method has an obvious drawback.
  • the technical problem to be solved by the embodiments of the present invention is how to effectively reduce the resources used for retransmission without increasing the amount of feedback information in data transmission.
  • an embodiment of the present invention provides a data transmission method, which is applied to a first transmission node, where the method includes:
  • the first transmission node performs packet coding on the M code block sets in the P code block sets to obtain S check code block sets; wherein the check code block set has a length of T bits, M , S, T are positive integers, and 2 ⁇ M ⁇ P;
  • the retransmitted data signal includes at least Q bits in the set of check code blocks; , Q is a positive integer, and 1 ⁇ Q ⁇ T.
  • the number of code blocks in each code block set is determined as follows:
  • each code block set includes K/P code blocks
  • each code block set includes Block of code
  • the padding block is composed of any preset data, including: a code block composed of an all 1-bit sequence or an all-zero bit sequence, or any one of the code block sets, or the Any one of the K code blocks of the transport block.
  • the method further includes:
  • code block concatenation refers to concatenating bit sequences of all code blocks in the code block set.
  • the K code blocks in the code block set are channel coded and rate matched code blocks
  • the K code blocks in the set of code blocks and the K code blocks in the transport block are generated by the same information bit sequence through a channel coder.
  • performing packet coding on the M code block sets in the P code block set refers to selecting M code block sets from the P code block sets to perform packet coding, where the method of selecting is as follows One:
  • the packet encoding refers to:
  • a bit or symbol having the same index position in the M code block sets is encoded to generate S check code block sets.
  • the packet encoding refers to:
  • bits or symbols of the M code block sets After cyclically shifting or interleaving the code blocks, bits or symbols of the M code block sets, the bits or symbols having the same index position are encoded to generate S check code block sets.
  • the encoding adopts one of the following methods: bit XOR coding, Reed Solomon coding, BCH coding, digital fountain code coding and the like, linear coding, symbol superposition coding, and network coding.
  • padding bits are added to other code block sets based on the length of the longest code block set, and the length of all M code block sets after padding is added. All of the same; wherein the padding bits are formed by any predetermined bit sequence, including: a full 1-bit sequence or an all-zero sequence, or a partial bit in any of the code blocks.
  • the at least the Q bits in the set of check code blocks in the retransmitted data signal are:
  • At least one retransmission data signal includes Q bits in the set of check code blocks, where m is a positive integer;
  • the manner in which the at least one retransmission data signal includes the Q bits in the check code block set is any one of the following:
  • the pre-G1 retransmission data signal includes Q bits in the check code block set, and the re-transmitted data signal does not include the check code block set from the G1+1th retransmission. a bit in ; where G1 is a predetermined fourth threshold, G1 is a positive integer, and 1 ⁇ G1 ⁇ D, where D Is the maximum number of retransmissions allowed by the system;
  • the pre-G2 retransmission data signal does not include the bit in the check code block set, and the retransmitted data signal includes the check code block set in the retransmitted data signal.
  • Q bits wherein G2 is a preset fifth threshold, G2 is a positive integer, and 1 ⁇ G2 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the Q bits in the check code block set are included;
  • Q bits in the set of check code blocks are included in only a few retransmission data signals.
  • the predetermined condition is that the first transmission node or the second transmission node is semi-statically or dynamically configured with a packet coding retransmission mode.
  • the embodiment of the invention further provides an apparatus, which is disposed in the transmission node, and includes:
  • a sending module configured to send a first transmitted data signal to a second transmitting node, wherein the data signal includes data of at least one transport block, the transport block includes K code blocks, and the K code blocks are divided into P codes a set of blocks; wherein K and P are positive integers, K ⁇ 3, 2 ⁇ P ⁇ K;
  • a packet coding module configured to perform packet coding on the M code block sets in the P code block sets to obtain S check code block sets; wherein the check code block set has a length of T bits, M , S, T are positive integers, and 2 ⁇ M ⁇ P;
  • a retransmission data generating module configured to generate a retransmission data signal, and send the signal to the second transmission node by using the sending module;
  • the retransmitted data signal includes at least Q bits in the parity code block set .
  • Q is a positive integer and 1 ⁇ Q ⁇ T.
  • the device further includes:
  • a code block set dividing module is configured to divide the K code blocks into P code block sets; the number of code blocks in each code block set is determined as follows:
  • each code block set includes K/P code blocks
  • each code block set includes Block of code
  • the padding block is composed of any preset data, including: a code block composed of an all 1-bit sequence or an all-zero bit sequence, or any one of the code block sets, or the Any one of the K code blocks of the transport block.
  • the device further includes:
  • a concatenation module configured to perform code block concatenation on the code blocks in each of the code block sets; wherein the code block concatenation refers to concatenating bit sequences of all code blocks in the code block set.
  • the K code blocks in the code block set are channel coded and rate matched code blocks
  • the K code blocks in the set of code blocks and the K code blocks in the transport block are generated by the same information bit sequence through a channel coder.
  • the packet coding module performs packet coding on the M code block sets in the P code block sets, where the M code block sets are selected from the P code block sets to perform packet coding, where
  • the method is one of the following:
  • the packet coding module performs packet coding, where:
  • the packet coding module encodes bits or symbols having the same index position in the M code block sets to generate S check code block sets.
  • the packet coding module performs packet coding, where:
  • the packet coding module cyclically shifts or interleaves the code blocks, bits or symbols of the M code block sets, and then encodes the bits or symbols having the same index position to generate S check code block sets. .
  • the packet coding module performs coding in one of the following ways: bit XOR coding, Reed Solomon coding, BCH coding, digital fountain code coding and other linear coding, symbol superposition coding, network coding.
  • the packet coding module is further configured to: when the lengths of the M code block sets are different, add padding bits in other code block sets based on the length of the longest code block set, and after filling All of the M code block sets are of the same length; wherein the padding bits are formed by any predetermined bit sequence, including: a full 1-bit sequence or an all-zero bit sequence, or any code block in the code block set Part of the bit.
  • the at least the Q bits in the set of check code blocks in the retransmitted data signal are:
  • the retransmitted data signal generated by the retransmission data module at least once is included in the parity code block set, where m is a positive integer;
  • the manner in which the retransmitted data signal generated at least once includes the Q bits in the check code block set is one of the following:
  • the retransmitted data signal generated by the pre-G1 times includes Q bits in the check code block set, and the generated retransmission data does not include the checksum from the G1+1 th retransmission. a bit in the set of code blocks; where G1 is a predetermined fourth threshold, G1 is a positive integer, and 1 ⁇ G1 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the retransmitted data signal generated by the pre-G2 times does not include the bit in the check code block set, and the generated retransmission data signal includes the check code from the G2+1 th retransmission.
  • Q bits in the set of blocks wherein G2 is a preset fifth threshold, G2 is a positive integer, and 1 ⁇ G2 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the Q-bits in the set of check code blocks are included in the retransmitted data signal generated only in an odd number of times;
  • Q bits in the set of check code blocks are included in the retransmitted data signal generated only in an even number of times.
  • the predetermined condition is that the first or second transmission node is semi-statically or dynamically configured with a packet coding retransmission mode.
  • the embodiment of the invention provides a data transmission method and device, which divides a large TB into a plurality of code block sets (CB Sets), and each code block set is composed of a plurality of code blocks, and if retransmission is needed, Packet coding is performed between these code block sets, and the packet coded data is transmitted to the receiving end as part of the retransmitted data. Since the packet coding is based on the code block set, the length of the redundant data packet generated after the packet coding is only 1/2 or even 1/P of the transmission block, so the amount of retransmitted data can be effectively reduced, and the efficiency of data retransmission is improved. The amount of feedback has not increased.
  • the beneficial effect of the embodiment of the present invention is that the performance of retransmission is enhanced.
  • a plurality of code blocks of one transport block are independent of each other, so the performance of the transport block is limited by the performance of a single code block, and also during retransmission; and in the retransmission data of the embodiment of the present invention,
  • the packet-encoded data of the code block set is included.
  • the packet coding adds a layer of code between the code blocks, so that the multiple code blocks are no longer independent of each other but are related to each other. If a code block is in error, it is possible to correct it by decoding the additional information provided by another code block. Therefore, the performance of retransmission is improved.
  • the embodiment of the present invention overcomes the defects of the related art, effectively reduces the amount of retransmitted data and improves the retransmission performance without increasing the amount of feedback information.
  • 1 is a schematic diagram of receiving multiple code blocks in a TB
  • FIG. 2 is a schematic diagram of packet coding
  • FIG. 3 is a schematic flow chart of a data transmission method according to Embodiment 1;
  • FIG. 4 is a schematic diagram of a code block set in Embodiments 1 and 2;
  • Example 5 is a schematic diagram of two code block sets in Example 1 of Embodiments 1 and 2;
  • FIG. 6 is a schematic diagram of packet coding between code block sets in Example 1 of Embodiments 1 and 2;
  • FIG. 7 is a schematic diagram of packet coding between code blocks in Example 1 of Embodiments 1 and 2;
  • Example 8 is a schematic diagram of a plurality of code block sets in Example 2 of Embodiments 1 and 2;
  • FIG. 9 is a schematic diagram of performing packet coding in Example 2 of Embodiments 1 and 2;
  • Figure 10 is a schematic block diagram of the apparatus of the second embodiment.
  • a data transmission method is applied to a first transmission node, and the method includes:
  • the first transmission node Transmitting, by the first transmission node, a first transmitted data signal to a second transmission node, wherein the data signal includes data of at least one transport block, the transport block includes K code blocks, and the K code blocks are divided into P a set of code blocks; wherein K and P are positive integers, K ⁇ 3, 2 ⁇ P ⁇ K;
  • the first transmission node performs packet coding on the M code block sets in the P code block sets to obtain S check code block sets; wherein the check code block set has a length of T bits, M , S, T are positive integers, and 2 ⁇ M ⁇ P;
  • the retransmitted data signal includes at least Q bits in the set of check code blocks; , Q is a positive integer, and 1 ⁇ Q ⁇ T.
  • the first transit node may be, but is not limited to, a network element having a data receiving and signaling function, such as a base station, a relay, and a terminal.
  • the second transmission node may be, but is not limited to, a network element having a signaling receiving function, such as a terminal, a base station, and a relay.
  • the value of the P and the scheme of dividing the code block into the code block set may be determined by the first transmission node, or may be notified by the second transmission node to notify the first transmission node.
  • the method further includes: the first transmission node receiving correct (ACK) or error (NACK) indication information about the transport block sent by the second transmission node.
  • ACK correct
  • NACK error indication information about the transport block sent by the second transmission node.
  • the method further includes: if the transmission of the first transmission node to the second transmission node occurs in a downlink direction, the first transmission node indicates, by using downlink control information, that the current transmission is a first transmission or a retransmission;
  • the method before the sending, by the first transmitting node, the retransmitted data signal to the second transmitting node, the method further includes: if the transmission of the first transmitting node to the second transmitting node occurs in an uplink direction, and the When a transmitting node detects downlink control information about the transport block, the first transmitting node determines whether to send a retransmitted data signal to the second transmitting node according to the downlink control information.
  • the method before the sending, by the first transmitting node, the retransmitted data signal to the second transmitting node, the method further includes: if the transmission of the first transmitting node to the second transmitting node occurs in an uplink direction, and the If a transmission node does not detect downlink control information about the transport block, the first transmission node determines whether to send retransmission data to the second transmission node according to the received ACK or NACK indication information of the transport block. signal. If the first transmission node receives the ACK information, the retransmission data signal is not sent to the second transmission node, and if the first transmission node receives the NACK information, the retransmission data signal is sent to the second transmission node. .
  • the number of code blocks in each code block set can be determined by the following method:
  • each code block set includes K/P code blocks
  • each code block set includes Block of code
  • the filler code block may be composed of any preset data, including but not limited to: a code block composed of an all 1-bit sequence or an all-zero sequence, or any one of the code block sets. Piece.
  • the filler code block may be composed of any preset data, including but not limited to: a code block composed of an all 1-bit sequence or an all-zero sequence, or K code blocks of the transport block. Any one of the code blocks.
  • the method further includes: performing code block concatenation on the code blocks (including the padding code blocks) in each of the code block sets; wherein the code block concatenation refers to: in the code block set The bit sequences of all the code blocks are concatenated.
  • the K code blocks in the code block set may be channel coded and rate matched code blocks
  • K code blocks in the code block set and K code blocks in the transport block are generated by a channel encoder by the same information bit sequence (or bit sequence to be encoded);
  • performing packet coding on the M code block sets in the P code block set refers to selecting M code block sets from the P code block sets to perform packet coding, where the selecting method may be but Not limited to one of the following:
  • the first, second, and third thresholds may be all or part of the same or may be different from each other.
  • the packet coding may be performed by encoding bits or symbols having the same index position in the M code block sets to generate S check code block sets.
  • the packet coding may further be: performing cyclic shifting or interleaving of the code blocks, bits, or symbols of the M code block sets, and then encoding the bits or symbols having the same index position to generate S check code block sets;
  • the encoding may be, but not limited to, using one of the following methods: bit exclusive OR (or modulo two addition) encoding, Reed Solomon encoding, BCH encoding, digital fountain code encoding, etc., linear symbol encoding, symbol superposition encoding, Network coding, etc.
  • the packet coding module is further configured to: when the lengths of the M code block sets are different, add padding bits in other code block sets based on the length of the longest code block set, and fill All M code block sets are the same length.
  • the padding bits may be, but are not limited to, composed of any preset bit sequence, including but not limited to: a full 1-bit sequence or an all-zero sequence, or a portion of any code block in the code block set. Bit.
  • the at least the Q bits in the set of check code blocks in the retransmitted data signal may be:
  • At least one retransmission data signal includes Q bits in the set of check code blocks, where m is a positive integer;
  • the manner in which the retransmitted data signal includes the Q bits in the set of check code blocks at least once may be, but is not limited to, one of the following:
  • the pre-G1 retransmission data signal includes Q bits in the check code block set, and the re-transmitted data signal does not include the check code block set from the G1+1th retransmission. a bit in ; where G1 is a predetermined fourth threshold, G1 is a positive integer, and 1 ⁇ G1 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the pre-G2 retransmission data signal does not include the bit in the check code block set, and the retransmitted data signal includes the check code block set in the retransmitted data signal.
  • Q bits wherein G2 is a preset fifth threshold, G2 is a positive integer, and 1 ⁇ G2 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the Q bits in the check code block set are included;
  • Q bits in the set of check code blocks are included in only a few retransmission data signals.
  • the fourth and fifth thresholds may be the same or different.
  • the predetermined condition is that the first transmission node or the second transmission node is semi-statically or dynamically configured with a packet coding retransmission mode
  • the retransmission data signal sent by the first transmission node to the second transmission node includes the parity code block set. Q bits in the block, or the bits in the set of check code blocks are not included in the retransmitted data signal.
  • the embodiment of the invention further provides an apparatus, which is disposed in the transmission node, and includes:
  • a sending module configured to send a first transmitted data signal to a second transmission node, where the data signal includes data of at least one transport block, the transport block includes K code blocks, and the K code blocks are divided into P blocks a set of code blocks; wherein, K and P are positive integers, K ⁇ 3, 2 ⁇ P ⁇ K;
  • a packet coding module configured to perform packet coding on the M code block sets in the P code block sets to obtain S check code block sets; wherein the check code block set has a length of T bits, M , S, T are positive integers, and 2 ⁇ M ⁇ P;
  • a retransmission data generating module configured to generate a retransmission data signal, and send the signal to the second transmission node by using the sending module.
  • the retransmitted data signal includes at least Q bits in the set of check code blocks. Where Q is a positive integer and 1 ⁇ Q ⁇ T.
  • the transmitting node may be, but not limited to, a network element having a data receiving and signaling function, such as a base station, a relay, a terminal, or the like;
  • the second transmission node may be, but is not limited to, a network element having a signaling receiving function, such as a terminal, a base station, and a relay.
  • the apparatus further includes a code block set dividing module: configured to divide the K code blocks into P code block sets;
  • the number of code blocks in each code block set can be determined by the following method:
  • each code block set includes K/P code blocks
  • each code block set includes Block of code
  • the padding block may be composed of any preset data, including but not limited to a code block composed of an all 1-bit sequence or an all-zero sequence, or any one of the code block sets. .
  • the filler code block may be composed of any preset data, including but not limited to a code block composed of an all 1-bit sequence or an all-zero sequence, or in K code blocks of the transport block. Any code block.
  • the device may further include:
  • a concatenation module configured to perform code block concatenation on the code blocks (including padding code blocks) in each code block set; wherein the code block concatenation refers to all code blocks in the code block set
  • the bit sequences are concatenated.
  • the K code blocks in the code block set may be channel coded and rate matched code blocks
  • K code blocks in the code block set and K code blocks in the transport block are generated by a channel encoder by the same information bit sequence (or bit sequence to be encoded);
  • the packet coding module performs packet coding on the M code block sets in the P code block sets, where the M code block sets are selected from the P code block sets to perform packet coding, where Square
  • the law can be but is not limited to one of the following:
  • the first, second, and third thresholds may be all or part of the same or may be different from each other.
  • the packet coding module performs packet coding, where the packet coding module encodes bits or symbols having the same index position in the M code block sets to generate S check code block sets.
  • the packet coding module performing packet coding may further include: the packet coding module cyclically shifts or interleaves the code blocks, bits, or symbols of the M code block sets, and then has the same The bits or symbols of the index position are encoded to generate S check code block sets;
  • the encoding by the packet encoding module may be, but not limited to, using one of the following methods: bit exclusive OR (or modulo two addition) encoding, Reed Solomon encoding, BCH encoding, digital fountain code encoding, and the like. Symbol superposition coding, network coding, etc.
  • padding bits are added to other code block sets based on the length of the longest code block set, and the length of all M code block sets is filled. All the same.
  • the padding bits may be, but are not limited to, being composed of any preset bit sequence, including but not limited to: a full 1-bit sequence or an all-zero sequence, or a portion of any code block in the code block set. Bit.
  • the at least the Q bits in the set of check code blocks in the retransmitted data signal may be:
  • the retransmitted data signal generated by the retransmission data module at least one time includes the Q bits in the check code block set, where m is a positive integer; at least one generated
  • the manner in which the retransmitted data signal includes the Q bits in the set of check code blocks may be, but is not limited to, one of the following:
  • the retransmitted data signal generated by the pre-G1 time includes Q bits in the check code block set, and the check code is not included in the retransmission data generated from the G1+1th retransmission. a bit in the set of blocks; where G1 is a predetermined fourth threshold, G1 is a positive integer, and 1 ⁇ G1 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the retransmitted data signal generated by the pre-G2 times does not include the bit in the check code block set, and the generated retransmission data signal includes the check code from the G2+1 th retransmission.
  • Q bits in the set of blocks wherein G2 is a preset fifth threshold, G2 is a positive integer, and 1 ⁇ G2 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the Q-bits in the set of check code blocks are included in the retransmitted data signal generated only in an odd number of times;
  • Q bits in the set of check code blocks are included in the retransmitted data signal generated only in an even number of times.
  • the fourth and fifth thresholds may be the same or different.
  • the predetermined condition is that the first or second transmission node is semi-statically or dynamically configured with a packet-coded retransmission mode; that is, the retransmission data signal sent by the first transmission node to the second transmission node is The Q bits in the set of check code blocks are included, or the bits in the set of check code blocks are not included in the retransmitted data signal.
  • Embodiment 1 (Retransmission Method Embodiment):
  • This embodiment provides a data transmission method, which is applied to a first transmission node, as shown in FIG. 3, and includes:
  • Step 101 The first transmission node sends the first transmitted data signal to the second transmission node, where the data signal includes data of at least one transport block, the transport block includes K code blocks, and the K code blocks Divided into P code block sets.
  • K and P are positive integers, K ⁇ 3, 2 ⁇ P ⁇ K;
  • Step 102 The first transmission node performs packet coding on the M code block sets in the P code block sets to obtain S check code block sets.
  • the length of the check code block set is T ratio Specifically, M, S, and T are positive integers, and 2 ⁇ M ⁇ P.
  • Step 103 The first transmission node sends a retransmission data signal to the second transmission node, where at least Q bits in the check code block set are included.
  • Q is a positive integer and 1 ⁇ Q ⁇ T.
  • the first transmission node is a base station or a relay, and the second transmission node is a terminal; or the first transmission node is a terminal, and the second transmission node is a base station or a relay.
  • the number of code blocks in each code block set can be determined by the following method:
  • each code block set includes K/P code blocks
  • each code block set includes Block of code
  • the padding block may be composed of any preset bit sequence, including but not limited to one of the following ways:
  • Method 1 a block of all 1-bit sequences or all-zero sequences
  • the method further includes performing code block concatenation of code blocks (including padding code blocks) divided into each code block set; wherein the code block concatenation refers to all of the code block sets.
  • the bit sequences of the code blocks are concatenated.
  • the code block set includes t code blocks, wherein the bit sequence of the i th code block is N i bits, and the bit sequence of the i th code block can be written as among them
  • the code block represents a set of N i i-th bit code blocks
  • the code block concatenation is performed, the set of code blocks can be written as:
  • Performing the bit sequence re-indexing of the code block cascade on the first code block set can be written among them Representing the Nthth bit in the first set of code blocks, i, t, N i , N' are positive integers, and 1 ⁇ i ⁇ t,
  • the first set of code blocks can be represented in the form shown in FIG. among them Represents the tth code block in the first set of code blocks.
  • K code blocks (unfilled code blocks) in the code block set may be channel coded and rate matched code blocks;
  • K code blocks in the code block set and K code blocks in the transport block are generated by channel coding by the same information bit sequence
  • the first transmission node performs channel coding and rate matching on the transport block, and then sends the data to the second transmission node, where the method is as follows:
  • the first transport node When the size of the transport block (TB) block exceeds a specified threshold, the first transport node first partitions the transport block into K code blocks (CB), and sequences the information bits of each code block (or is called to be encoded)
  • the bit sequence is separately subjected to channel coding, and the channel coding may be a coding method such as a turbo code or a low density parity check code (LDPC code);
  • a fixed code rate R 0 is used as the mother code rate of the channel coding
  • each code block is channel coded at a code rate R 0
  • the generated coded code word bit sequence is placed as a mother code in the buffer.
  • the information bit length of the i-th code block is L i bits
  • the cache may be a virtual cache and implement virtual interleaving and rate matching functions through addressing operations;
  • the second transmission node When the second transmission node fails to correctly receive the transport block transmitted by the first transmission node, the second transmission node feeds back the wrong indication information (NACK) to the first transmission node. After receiving the NACK information, the first transmission node sends a retransmission data signal to the second transmission node.
  • NACK indication information
  • the first transmission node After receiving the NACK information, the first transmission node sends a retransmission data signal to the second transmission node.
  • the role of rate matching is to select N 2 bits from the mother code of length N 0 bits.
  • N 1 and N 2 may be equal or unequal, and the manner in which the bit sequence to be transmitted is selected from the mother code (for example, the start position of the bit sequence to be transmitted, etc.) may be the same or different. Therefore, when any two transmissions are made, the bit sequence to be transmitted of the same code block may be the same or different.
  • the transmission bit sequence of the K code blocks constituting the transport block and the bit sequence of the K code blocks divided into the P code block sets belong to the first transmission and the retransmission transmission, respectively.
  • the two sets of bit sequences may be the same or different. However, since they are all generated by the same information bit sequence through the same mother code encoder, they are essentially the same code block. In this embodiment, it is considered that all having the same information bit sequence, whether or not subjected to channel coding and rate matching, are regarded as the same code block.
  • the packet coding is to encode a bit or a symbol having the same index position in the M code block set to generate S check code block sets;
  • the packet coding may further be: performing cyclic shifting or interleaving of the code blocks, bits, or symbols of the M code block sets, and then encoding the bits or symbols having the same index position to generate S check code block sets;
  • the encoding operation may be, but not limited to, one of the following methods: bitwise exclusive OR (or modulo two addition) encoding, generating matrix encoding, Reed Solomon encoding, BCH encoding, digital fountain code encoding, and the like, Symbol superposition coding, or network coding.
  • the to-be-transmitted bit sequence of the first transmission node needs to be converted into a modulation symbol by digital baseband modulation, and then sent to the second transmission node, so the packet of this embodiment.
  • the encoding can be a bit-level packet encoding or a symbol-level packet encoding.
  • the first transmission node selects M code block sets in the P code block sets for packet coding, where M is a positive integer, and 2 ⁇ M ⁇ P.
  • the method for selecting the M code block sets from the P code block sets may be, but is not limited to, one of the following:
  • padding bits are added to other code block sets based on the length of the longest code block set, and the lengths of all M code block sets after padding are the same.
  • the padding bits may be, but are not limited to, being composed of any preset bit sequence, including but not limited to a full 1-bit sequence or an all-zero bit sequence, or a partial bit in any code block in the code block set. .
  • the bit-level packet coding means that, for the M code block sets, bits at each same index position of each code block set are encoded, and each of the S check code block sets is obtained. Checking bits at corresponding index positions of the code block set; for example, among the M code block sets, encoding the i-th bit of each code block set to obtain each check in the S check code block sets The ith bit of the set of code blocks.
  • the bit-level packet coding may be performed by bitwise exclusive OR (or modulo two-addition) coding, that is, performing exclusive-OR (or modulo-two-addition) operations between bits having the same index position in a plurality of code block sets.
  • Generating a check code block set; the bit level block code may also adopt a linear coding method such as generating matrix coding, Reed Solomon coding, BCH coding, digital fountain code coding, etc., that is, having the same index in multiple code block sets
  • the bit of the position is used as the information bit sequence, and the information bit sequence is encoded as above to generate a check bit sequence.
  • the bits having the same position index are cascaded to form a check code block set.
  • the bit-level coding may also adopt a network coding manner, that is, linear or non-linear network coding of bits having the same index position in a plurality of code block sets to generate an encoded bit sequence, and multiple coded bits.
  • the bits in the sequence with the same position index are concatenated to form a set of check code blocks.
  • the packet coding of the symbol level means that, for the M code block sets, the bit sequence of each code block set is digital baseband modulated to obtain a corresponding modulation symbol sequence, and the M code block sets are the same.
  • the modulation symbols at the index position are encoded to obtain symbols at corresponding index positions of the plurality of check code block sets in the S check code block sets; for example, among the M code block sets, each code block set
  • the i-th modulation symbol is encoded to obtain an ith symbol of each of the S-check code block sets.
  • the symbol level of the packet coding may adopt a symbol superposition coding manner, that is, will be in multiple code blocks.
  • the symbols with the same index position in the set are linearly superimposed to generate a check symbol sequence, and the symbols with the same position index in the check symbol sequence are concatenated to form a check code block set;
  • the symbol level coding may also adopt a network.
  • the method of encoding that is, linear or non-linear network coding of symbols having the same index position in a plurality of code block sets, generating a check symbol sequence, and cascading symbols having the same position index in the check symbol sequence to form a school Code block set;
  • At least one retransmission data signal of the m retransmission data signals includes the check code block set.
  • Q bits, where m is a positive integer; the mode can be, but is not limited to, one of the following:
  • the pre-G1 retransmission data signal includes Q bits in the check code block set, and the re-transmitted data signal does not include the check code block set from the G1+1th retransmission. a bit in ; where G1 is a predetermined fourth threshold, G1 is a positive integer, and 1 ⁇ G1 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the pre-G2 retransmission data signal does not include the bit in the check code block set, and the retransmitted data signal includes the check code block set in the retransmitted data signal.
  • Q bits wherein G2 is a preset fifth threshold, G2 is a positive integer, and 1 ⁇ G2 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the Q bits in the check code block set are included;
  • Q bits in the set of check code blocks are included in only a few retransmission data signals.
  • the retransmission data signal sent by the first transmission node to the second transmission node includes the check code block.
  • Q bits in the set, or the bits in the set of check code blocks are not included in the retransmitted data signal;
  • composition of the retransmitted data signal includes, but is not limited to, the following manner:
  • Manner 1 The retransmitted data signal includes only Q bits in the set of S check code blocks;
  • the retransmitted data signal includes Q bits in the S check code block set, and also includes D bits in the P code block set, where D is a positive integer, and 1 ⁇ D ⁇ Z, where Z is the length of the set of P code blocks.
  • Step A1 The base station (or relay) transmits a transport block containing 8 code blocks to the terminal, wherein each code block has a code block CRC, and each transport block also has a transport block CRC.
  • Step A2 due to the influence of the channel error, the transport block CRC or the code block CRC fails to pass the CRC check on the terminal side, that is, the terminal fails to correctly receive the transport block, and the terminal goes to the The base station (or relay) feeds back error indication information (NACK) about the transport block.
  • NACK back error indication information
  • the base station performs packet coding on the two code block sets.
  • the bit sequence of the code block set 1 and the code block set 2 are all N' bits
  • the packet coding adopts bit XOR (or The modulo two-addition method, that is, an exclusive-OR (or modulo-two-addition) operation between bits having the same index position in a plurality of code block sets, as shown in FIG. 6, the code block set 1 and the code An exclusive OR (or modulo two) operation between bits of the same set index position in block set 2:
  • Generated check bits are cascaded It constitutes the data after the package is encoded.
  • the packet-encoded data also constitutes a set of code blocks of length N' bits.
  • the block coding between the code block sets can also be regarded as the block coding between the code blocks. Therefore, the packet coding shown in FIG. 6 can also be represented as FIG. The form, wherein CB1', CB2', CB3', CB4' are code blocks in the packet code set A of the block code.
  • Step A3 The base station (or relay) sends a retransmission data signal to the terminal.
  • the packet coding retransmission mode is semi-statically configured in the high layer signaling of the base station, and the retransmitted data signal includes at least Some of the bits in the box can be one of the following:
  • Retransmit data signals only include All or part of the bits; or, retransmit the data signal except In addition to all or part of the bits, some or all of the code block set 1 or the code block set 2 are also included.
  • the terminal After receiving the retransmitted data signal sent by the base station (or the relay), the terminal decodes the transport block by using the retransmitted data and the data received during the first transmission, where the decoding may be but not limited to One of the following ways:
  • Hard decision decoding after performing hard decision on the first transmitted data and the retransmitted data, recovering the decoded error code block in the first transmission by using the characteristics of the linear code; or
  • Soft decision decoding Combining or iterative decoding of the soft decision information transmitted for the first time and the soft decision information of the retransmission to recover the code block of the decoding error in the first transmission.
  • Step B1 The terminal sends a transport block containing 39 code blocks to the base station (or relay), wherein each code block has a code block CRC, and each transport block also has a transport block CRC.
  • Step B2 On the base station (or relay) side, the transport block CRC or the code block CRC fails to pass the CRC check due to the influence of the channel error, that is, the base station (or relay) fails to correctly receive the The transport block, the base station (or relay) feeds back error indication information (NACK) about the transport block to the terminal.
  • NACK back error indication information
  • the code block CB40 represents a padding block, and the pad code block CB40 may be composed of any preset bit sequence, including but not limited to one of the following ways:
  • Method 1 a block of all 1-bit sequences or all-zero sequences
  • the retransmitted data signal includes only all or part of the bits of the check code block set A1, the check code block set A2, or the check code block set A3; or the retransmitted data signal includes all of the check code block set In addition to the partial bits, some or all of the code block set 1 to the code block set 7 are also included.
  • the terminal After receiving the retransmitted data signal sent by the base station (or the relay), the terminal decodes the transport block by using the retransmitted data and the data received during the first transmission, where the decoding may be but not limited to One of the following ways:
  • Hard decision decoding after performing hard decision on the first transmitted data and the retransmitted data, recovering the decoded error code block in the first transmission by using the characteristics of the linear code; or
  • Soft decision decoding Combining or iterative decoding of the soft decision information transmitted for the first time and the soft decision information of the retransmission to recover the code block of the decoding error in the first transmission.
  • Step C1 of this example is the same as step B1 of Example 2.
  • step C2 of the present example The difference between step C2 of the present example and step B2 of example 2 is that the packet encoding of the present example adopts a symbol level encoding manner;
  • step C3 of the present example is that the retransmission data signal of the present example is presented in the form of a modulation symbol, and the corresponding retransmission bit sequence before modulation is the same as that of the example 2;
  • the terminal After receiving the retransmitted data signal sent by the base station (or the relay), the terminal decodes the transport block by using the retransmitted data and the data received during the first transmission, where the decoding may be but not limited to One of the following ways:
  • Serial interference cancellation decoding After the serial interference cancellation of the retransmitted superimposed symbols, the estimation information of the M code block sets is obtained, and then the first transmitted data is used for hard decision or soft decision decoding to recover the decoding error in the first transmission.
  • Maximum Likelihood Decoding The maximum likelihood estimation of the retransmitted superimposed symbols is followed by the estimation information of the M code block sets, and then the first transmitted data is used for hard decision or soft decision decoding to restore the first Decoding the wrong code block in the secondary transmission;
  • Embodiment 2 (Device Embodiment)
  • This embodiment provides an apparatus for applying to a first transmission node. As shown in FIG. 10, the apparatus includes:
  • a sending module configured to send a first transmitted data signal to a second transmission node, where the data signal includes data of at least one transport block, the transport block includes K code blocks, and the K code blocks are divided into P blocks a set of code blocks; wherein, K and P are positive integers, K ⁇ 3, 2 ⁇ P ⁇ K;
  • a packet coding module configured to perform packet coding on the M code block sets in the P code block sets to obtain S check code block sets; wherein the check code block set has a length of T bits, M , S, T are positive integers, and 2 ⁇ M ⁇ P;
  • a retransmission data generating module configured to generate a retransmission data signal, and send the signal to the second transmission node by using the sending module.
  • the retransmitted data signal includes at least Q bits in the set of check code blocks. Where Q is a positive integer and 1 ⁇ Q ⁇ T.
  • the first transmission node is a base station or a relay
  • the second transmission node is a terminal
  • the first transmission node is a terminal
  • the second transmission node is a base station or a relay.
  • the apparatus further includes a code block set dividing module, configured to divide the K code blocks into P code block sets;
  • the number of code blocks in each code block set can be determined by the following method:
  • each code block set includes K/P code blocks
  • each code block set includes Block of code
  • the padding block may be composed of any preset bit sequence, including but not limited to one of the following ways:
  • Method 1 a block of all 1-bit sequences or all-zero sequences
  • the apparatus further includes: a concatenation module, configured to perform code block concatenation of code blocks (including padding code blocks) divided into each code block set; wherein the code block concatenation refers to The bit sequences of all code blocks in the code block set are concatenated.
  • a concatenation module configured to perform code block concatenation of code blocks (including padding code blocks) divided into each code block set; wherein the code block concatenation refers to The bit sequences of all code blocks in the code block set are concatenated.
  • the code block set includes t code blocks, wherein the bit sequence of the i th code block is N i bits, and the bit sequence of the i th code block can be written into the i th code The bit sequence of the block can be written as among them After the code block represents a set of N i i-th bit code blocks, the code block concatenation is performed, the set of code blocks can be written as:
  • code block set 1 can be expressed in the form as shown in FIG. Where CB 1 t represents the t-th code block in the first set of code blocks.
  • K code blocks (unfilled code blocks) in the code block set may be channel coded and rate matched code blocks:
  • K code blocks in the code block set and K code blocks in the transport block are generated by channel coding by the same information bit sequence
  • the first transmission node performs channel coding and rate matching on the transport block, and then sends the data to the second transmission node, where the method is as follows:
  • the first transport node When the size of the transport block (TB) block exceeds a specified threshold, the first transport node first partitions the transport block into K code blocks (CB), and sequences the information bits of each code block (or is called to be encoded)
  • the bit sequence is separately subjected to channel coding, and the channel coding may be a coding method such as a turbo code or a low density parity check code (LDPC code);
  • a fixed code rate R 0 is used as the mother code rate of the channel coding
  • each code block is channel coded at a code rate R 0
  • the generated coded code word bit sequence is placed as a mother code in the buffer.
  • the information bit length of the i-th code block is L i bits
  • the cache may be a virtual cache and implement virtual interleaving and rate matching functions through addressing operations;
  • the second transmission node When the second transmission node fails to correctly receive the transport block transmitted by the first transmission node, the second transmission node feeds back the wrong indication information (NACK) to the first transmission node. After receiving the NACK information, the first transmission node sends a retransmission data signal to the second transmission node.
  • NACK indication information
  • the first transmission node After receiving the NACK information, the first transmission node sends a retransmission data signal to the second transmission node.
  • the role of rate matching is to select N 2 bits from the mother code of length N 0 bits.
  • N 1 and N 2 may be equal or unequal, and the manner in which the bit sequence to be transmitted is selected from the mother code (for example, the start position of the bit sequence to be transmitted, etc.) may be the same or different. Therefore, when any two transmissions are made, the bit sequence to be transmitted of the same code block may be the same or different.
  • the transmission bit sequence of the K code blocks constituting the transport block and the bit sequence of the K code blocks divided into the P code block sets belong to the first transmission and the retransmission transmission, respectively.
  • the two sets of bit sequences may be the same or different. However, since they are all generated by the same information bit sequence through the same mother code encoder, they are essentially the same code block. In this embodiment, it is considered that all having the same information bit sequence, whether or not subjected to channel coding and rate matching, are regarded as the same code block.
  • the packet coding is to encode a bit or a symbol having the same index position in the M code block set to generate S check code block sets;
  • the packet coding may further be: performing cyclic shifting or interleaving of the code blocks, bits, or symbols of the M code block sets, and then encoding the bits or symbols having the same index position to generate S check code block sets;
  • the encoding operation may be, but is not limited to, one of the following modes: bit exclusive OR (or modulo two addition) encoding, generating matrix encoding, Reed Solomon encoding, BCH encoding, digital fountain code Linear coding such as coding, symbol superposition coding, or network coding.
  • the to-be-transmitted bit sequence of the first transmission node needs to be converted into a modulation symbol by digital baseband modulation, and then sent to the second transmission node, so the packet of this embodiment.
  • the encoding can be a bit-level packet encoding or a symbol-level packet encoding.
  • the packet coding module selects M code block sets in the P code block sets for packet coding, where M is a positive integer and 2 ⁇ M ⁇ P.
  • the method for selecting the M code block sets from the P code block sets may be, but is not limited to, one of the following:
  • the packet coding module adds padding bits to other code block sets based on the length of the longest code block set, and fills all M code block sets after padding.
  • the lengths are the same.
  • the padding bits may be composed of any but not limited to any preset bit sequence, including but not limited to a code block composed of an all 1-bit sequence or an all-zero sequence, or any code in the code block set.
  • the bit-level packet coding means that, for the M code block sets, bits at each same index position of each code block set are encoded, and each of the S check code block sets is obtained. Checking bits at corresponding index positions of the code block set; for example, among the M code block sets, encoding the i-th bit of each code block set to obtain each check in the S check code block sets The ith bit of the set of code blocks.
  • the bit-level packet coding may be performed by bitwise exclusive OR (or modulo two-addition) coding, that is, performing exclusive-OR (or modulo-two-addition) operations between bits having the same index position in a plurality of code block sets.
  • Generating a check code block set; the bit level block code may also adopt a linear coding method such as generating matrix coding, Reed Solomon coding, BCH coding, digital fountain code coding, ie, multiple code blocks
  • a bit having the same index position in the set is used as an information bit sequence, and the information bit sequence is encoded as above to generate a check bit sequence.
  • bits having the same position index are cascaded to form a school.
  • the code block set may also adopt a network coding manner, that is, linear or non-linear network coding of bits having the same index position in a plurality of code block sets to generate a coded bit sequence, which will be more
  • the bits having the same position index in the encoded bit sequence are cascaded to form a check code block set;
  • the packet coding of the symbol level means that, for the M code block sets, the bit sequence of each code block set is digital baseband modulated to obtain a corresponding modulation symbol sequence, and the M code block sets are the same.
  • the modulation symbols at the index position are encoded to obtain symbols at corresponding index positions of the plurality of check code block sets in the S check code block sets; for example, among the M code block sets, each code block set
  • the i-th modulation symbol is encoded to obtain an ith symbol of each of the S-check code block sets.
  • the symbol coding of the symbol level may adopt a symbol superposition coding manner, that is, linearly superimposing symbols having the same index position in a plurality of code block sets to generate a check symbol sequence, and the check symbol sequence has the same position.
  • the symbols of the index are concatenated to form a set of check code blocks;
  • the coding of the symbol level may also adopt a network coding manner, that is, linear or non-linear network coding of symbols having the same index position in multiple code block sets. Generating a sequence of check symbols, cascading symbols having the same position index in the sequence of check symbols to form a set of check code blocks;
  • the retransmission data signal generated by the retransmission data generating module at least one time is generated Include Q bits in the set of check code blocks, where m is a positive integer; the manner may be, but is not limited to, one of the following:
  • the retransmitted data signal generated by the pre-G1 time includes Q bits in the check code block set, and the generated retransmission data signal does not include the school from the G1+1th retransmission.
  • a bit in the code block set wherein G1 is a preset fourth threshold, G1 is a positive integer, and 1 ⁇ G1 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the retransmitted data signal generated by the pre-G2 times does not include the bit in the check code block set, and the generated retransmission data signal includes the check code from the G2+1 th retransmission.
  • Piece Q bits in the set where G2 is a preset fifth threshold, G2 is a positive integer, and 1 ⁇ G2 ⁇ D, where D is the maximum number of retransmissions allowed by the system;
  • the Q-bits in the set of check code blocks are included in the retransmitted data signal generated only in an odd number of times;
  • Q bits in the set of check code blocks are included in the retransmitted data signal generated only in an even number of times.
  • the retransmission data signal sent by the first transmission node to the second transmission node includes the check code block.
  • Q bits in the set, or the bits in the set of check code blocks are not included in the retransmitted data signal.
  • composition of the retransmitted data signal includes, but is not limited to, the following manner:
  • Manner 1 The retransmitted data signal includes only Q bits in the set of S check code blocks;
  • the retransmitted data signal includes Q bits in the S check code block set, and also includes D bits in the P code block set, where D is a positive integer, and 1 ⁇ D ⁇ Z, where Z is the length of the set of P code blocks.
  • the base station in this example includes a transmitting module, a packet encoding module, and a retransmission data generating module.
  • a packet coding module the base station performs packet coding on the two code block sets.
  • the length of the bit sequence of the code block set 1 and the code block set 2 is N' bits, and the packet coding ratio is used.
  • Specific or (or modulo two-addition) coding that is, an exclusive-OR (or modulo-two-addition) operation between bits having the same index position in a plurality of code block sets, as shown in FIG.
  • An exclusive-OR (or modulo-two-addition) operation is performed between the set 1 and the bits of the code block set 2 having the same index position:
  • Generated check bits are cascaded It constitutes the data after the package is encoded.
  • the packet-encoded data also constitutes a set of code blocks of length N' bits.
  • the block coding between the code block sets can also be regarded as the block coding between the code blocks. Therefore, the packet coding shown in FIG. 6 can also be represented as FIG. The form, wherein CB1', CB2', CB3', CB4' are code blocks in the packet code set A of the block code.
  • the base station (or relay) generates a retransmission data signal to be sent to the terminal.
  • the packet coding retransmission mode is semi-statically configured in the high layer signaling of the base station, and the retransmitted data signal includes at least Some of the bits in the box can be one of the following:
  • Retransmit data signals only include All or part of the bits; or, retransmit the data signal except In addition to all or part of the bits, some or all of the code block set 1 or the code block set 2 are also included.
  • the base station sends the retransmitted data signal to the terminal by using a sending module.
  • the terminal After receiving the retransmitted data signal sent by the base station (or the relay), the terminal decodes the transport block by using the retransmitted data and the data received during the first transmission, where the decoding may be but not limited to One of the following ways:
  • Hard decision decoding after performing hard decision on the first transmitted data and the retransmitted data, recovering the decoded error code block in the first transmission by using the characteristics of the linear code; or
  • Soft decision decoding Combining or iterative decoding of the soft decision information transmitted for the first time and the soft decision information of the retransmission to recover the code block of the decoding error in the first transmission.
  • the base station is a first transmission node
  • the terminal is a second transmission node
  • the base station includes: a sending module, a code block set dividing module, a packet encoding module, and a retransmission data generating module.
  • the transmitting module of the base station sends a transport block signal including 39 code blocks to the terminal, wherein each code block has a code block CRC, and each transport block also has a transport block CRC.
  • the terminal feeds back the base station to the base station.
  • the error indication information (NACK) of the transport block is, the base station (or relay) fails to correctly receive the transport block.
  • the code block CB40 represents a padding block, and the pad code block CB40 may be composed of any preset bit sequence, including but not limited to one of the following ways:
  • Method 1 a block of all 1-bit sequences or all-zero sequences
  • the retransmission data generating module of the base station is configured to generate a retransmission data signal sent to the terminal.
  • the retransmitted data signal includes at least part of the bits in the set of check code blocks, which may be one of the following ways:
  • the retransmitted data signal includes only all or part of the bits of the check code block set A1, the check code block set A2, or the check code block set A3; or the retransmitted data signal includes all of the check code block set In addition to the partial bits, some or all of the code block set 1 to the code block set 7 are also included.
  • the sending module of the base station is configured to send the retransmitted data signal to the terminal.
  • the terminal After receiving the retransmitted data signal sent by the base station (or the relay), the terminal decodes the transport block by using the retransmitted data and the data received during the first transmission, where the decoding may be but not limited to One of the following ways:
  • Hard decision decoding after performing hard decision on the first transmitted data and the retransmitted data, recovering the decoded error code block in the first transmission by using the characteristics of the linear code; or
  • Soft decision decoding Combining or iterative decoding of the soft decision information transmitted for the first time and the soft decision information of the retransmission to recover the code block of the decoding error in the first transmission.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • Embodiments of the present invention enhance the performance of retransmission.
  • the packet encoded data of the code block set is included, and the packet coding adds a layer of coding between the code blocks, so that the multiple code blocks are no longer independent of each other. It is related to each other. If a code block is in error, it is possible to correct it by decoding the additional information provided by another code block. Therefore, the performance of retransmission is improved.
  • the embodiment of the invention effectively reduces the amount of retransmitted data without increasing the amount of feedback information, and improves the retransmission performance.

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Abstract

一种数据传输方法及装置；所述方法包括：所述第一传输节点向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据，所述传输块包括K个码块，所述K个码块划分到P个码块集合中；所述第一传输节点对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；所述第一传输节点生成重传数据信号并发送给所述第二传输节点；当满足预定条件时，所述重传数据信号中至少包括所述校验码块集合中的Q个比特。本发明实施例能在不增加反馈信息数量的条件下有效降低重传所用资源。

Description

一种数据传输方法及装置 技术领域
本文涉及移动通信领域，特别涉及一种数据传输方法及装置。
背景技术
在目前LTE(Long Term Evolution，长期演进)系统里，物理层数据共享信道是以传输块(TB)为基本单位进行数据传输的。接收端通过TB的循环冗余校验码(CRC)来判断当前TB是否被正确接收。若TB被正确接收，接收端向发送端反馈ACK消息，若TB没有正确接收，接收端向发送端反馈NACK消息。发送端收到NACK消息后将向接收端重新传输数据，重传仍然以TB为单位进行。
当传输块(TB)块大小超过规定的门限时，发送端通常要进行码块(CB)分割，将TB分割成多个CB，每个CB分别进行编码、速率匹配和码块级联等操作后再发送给接收端。
每个CB在编码前都会添加CRC，此外每个TB也有CRC。在LTE里这两种CRC的长度都是24bit，CB CRC用于译码的提前终止。CB CRC也可以对码块的正确性进行校验，若CB CRC校验通过则说明该CB是正确的CB，若CB CRC校验不通过，则说明该CB是错误的CB。
TB CRC用于对接收的TB进行正确性校验，当TB CRC在接收端校验不通过时，说明TB接收错误，需要对TB块进行重传。当TB中的CB数量较多时，重传占用的资源比较大。例如图1所示，一个TB包含8个CB，首次传输的时候只有CB2和CB5译码错误。但是在重传的时候，其他没有出错的码块也要重传，原因是目前LTE系统的ACK(Acknowledgement，确认字符)/NACK(Nacknowledgement，否定字符)是都基于TB反馈的，没有基于CB的ACK/NACK反馈，如果要基于CB反馈，上行ACK/NACK的反馈开销太大。
包编码是一种数据包之间的编码技术，即通过对多个源数据包进行编码 生成校验数据包的过程。如图2所示，由源数据包中对应位置上的信息序列生成校验数据包中对应位置上的校验序列的过程就是包编码。每个校验数据包都包含一个或者多个校验序列中对应位置上的数据。包编码的方法可以是多样的，例如可以通过将多个源数据包进行异或的方式产生校验数据包，也可以通过里德所罗门编码的方式产生校验数据包，还可以通过喷泉码或者网络编码的方式生成校验数据包。
在数字移动通信系统中，经过速率匹配后的编码比特序列需要调制为数字基带信号后才能进行传输。在LTE系统中常用的调制星座图有BPSK、QPSK，16QAM，64QAM等。在这些调制星座图中都有一个或者多个有限的离散星座点用于表示数字基带信号的幅度和相位，星座点之间的几何距离被称之为欧式距离，如果相邻星座点之间的欧式距离相等的，且每个星座点是均匀分布在星座图内，则称该调制星座图是均匀星座图，例如，LTE系统中使用的QPSK，16QAM，64QAM等调制星座图都是均匀星座图，反之，若相邻星座点之间的欧式距离不相等，或者每个星座点在星座图内的分布是不相等的，则称该星座图为非均匀星座图。
在相关技术中，物理层的数据重传是基于整个传输块的，即如果首次传输的传输块信号中有至少一个码块接收错误时，重传时就要重传全部的传输块，首传时接收正确的码块重传的时候仍然要被传输，这显然对于重传时的频谱资源的利用是不利的。如果要提高重传的效率，一种容易想到的办法是接收端对每个码块进行反馈，这样发送端就只用重传接收错误的码块，但是这种方法有一个明显的缺陷就是增大了反馈信令的开销，每个码块都反馈ACK或NACK，则反馈信令的数量将增大几倍甚至几十倍，将严重超过反馈信道的承载能力，因此这种方法没有被LTE等主流通信技术采纳。
发明内容
本发明实施例要解决的技术问题是在数据传输中，如何在不增加反馈信息数量的条件下有效降低重传所用资源。
为了解决上述问题，本发明实施例提供了一种数据传输方法，应用于第一传输节点，所述方法包括：
所述第一传输节点向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据，所述传输块包括K个码块，所述K个码块划分到P个码块集合中；其中，K、P为正整数，K≥3，2≤P≤K；
所述第一传输节点对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；其中，所述校验码块集合的长度为T比特，M，S，T都为正整数，且2≤M≤P；
所述第一传输节点生成重传数据信号并发送给所述第二传输节点；当满足预定条件时，所述重传数据信号中至少包括所述校验码块集合中的Q个比特；其中，Q为正整数，且1≤Q≤T。
可选地，每个码块集合中的码块数目确定如下：
K能被P整除时，每个码块集合中包括K/P个码块；
K不能被P整除时，在
Figure PCTCN2015078886-appb-000001
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000002
个码块，在
Figure PCTCN2015078886-appb-000003
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000004
个原码块和1个填充码块；其中，运算符
Figure PCTCN2015078886-appb-000005
和
Figure PCTCN2015078886-appb-000006
分别表示对x进行向上或向下取整数运算，且P1+P2＝P。
可选地，所述填充码块由任何预先设定的数据构成，包括：全1比特序列或全0比特序列构成的码块，或者所述码块集合中的任一个码块，或者所述传输块的K个码块中的任一个码块。
可选地，所述的方法还包括：
对所述每个码块集合中的码块进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
可选地，所述码块集合中的K个码块是经过信道编码和速率匹配后的码块；
所述码块集合中的K个码块与所述传输块中的K个码块是由相同信息比特序列经过信道编码器生成。
可选地，所述对P个码块集合中的M个码块集合进行包编码是指从所述P个码块集合中选择M个码块集合进行包编码，其中，选择的方法为以下之一：
从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合。
可选地，所述包编码是指：
对所述M个码块集合内具有相同索引位置的比特或符号进行编码，生成S个校验码块集合。
可选地，所述包编码是指：
对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合。
可选地，所述编码采用以下方式之一：比特异或编码、里德所罗门编码，BCH编码，数字喷泉码编码等线性编码，符号叠加编码，网络编码。
可选地，当所述M个码块集合的长度不同时，以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同；其中，所述填充比特由任何预先设定的比特序列构成，包括：全1比特序列或全0比特序列，或者所述码块集合中的任何码块中的部分比特。
可选地，所述重传数据信号中至少包括所述校验码块集合中的Q个比特是指：
在m次重传数据信号中，至少有一次重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；
所述至少有一次重传数据信号包括所述校验码块集合中的Q个比特的方式为以下任一种：
仅第一次重传数据信号中包括所述校验码块集合中的Q个比特；
或者，前G1次重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始，所述重传数据信号中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D 是系统允许的最大重传次数；
或者，前G2次重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，所述重传数据信号中包括所述校验码块集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
或者，仅奇数次重传数据信号中包括所述校验码块集合中的Q个比特；
或者，仅偶数次重传数据信号中包括所述校验码块集合中的Q个比特。
可选地，所述预定条件为所述第一传输节点或第二传输节点半静态或动态配置了包编码重传模式。
本发明实施例还提供了一种装置，设置于传输节点中，包括：
发送模块，设置为向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据所述传输块包括K个码块，所述K个码块分成P个码块集合；其中，K、P为正整数，K≥3，2≤P≤K；
包编码模块，设置为对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；其中，所述校验码块集合的长度为T比特，M，S，T都为正整数，且2≤M≤P；
重传数据生成模块，设置为生成重传数据信号，并通过所述发送模块发送到所述第二传输节点；所述重传数据信号中至少包括所述校验码块集合中的Q个比特。其中，Q为正整数，且1≤Q≤T。
可选地，所述的装置还包括：
码块集合划分模块，设置为将所述K个码块划分到P个码块集合中；每个码块集合中的码块数目确定如下：
K能被P整除时，每个码块集合中包括K/P个码块；
K不能被P整除时，在
Figure PCTCN2015078886-appb-000007
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000008
个码块，在
Figure PCTCN2015078886-appb-000009
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000010
个原码块和1个填充码块；其中，运算符
Figure PCTCN2015078886-appb-000011
和
Figure PCTCN2015078886-appb-000012
分别表示对x进行向上或 向下取整数运算，且P1+P2＝P。
可选地，所述填充码块由任何预先设定的数据构成，包括：全1比特序列或全0比特序列构成的码块，或者所述码块集合中的任一个码块，或者所述传输块的K个码块中的任一个码块。
可选地，所述的装置还包括：
级联模块，设置为对所述每个码块集合中的码块进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
可选地，所述码块集合中的K个码块是经过信道编码和速率匹配后的码块；
所述码块集合中的K个码块与所述传输块中的K个码块是由相同信息比特序列经过信道编码器生成。
可选地，所述包编码模块对P个码块集合中的M个码块集合进行包编码是指从所述P个码块集合中选择M个码块集合进行包编码，其中，选择的方法为以下之一：
从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合。
可选地，所述包编码模块进行包编码是指：
所述包编码模块对所述M个码块集合内具有相同索引位置的比特或符号进行编码，生成S个校验码块集合。
可选地，所述包编码模块进行包编码是指：
所述包编码模块对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合。
可选地，所述包编码模块进行编码采用以下方式之一：比特异或编码、 里德所罗门编码，BCH编码，数字喷泉码编码等线性编码，符号叠加编码，网络编码。
可选地，所述包编码模块还设置为当所述M个码块集合的长度不同时，以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同；其中，所述填充比特由任何预先设定的比特序列构成，包括：全1比特序列或全0比特序列，或者所述码块集合中的任何码块中的部分比特。
可选地，所述重传数据信号中至少包括所述校验码块集合中的Q个比特是指：
所述重传数据模块生成的m次重传数据信号中，至少有一次生成的重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；
其中，至少有一次生成的重传数据信号包括所述校验码块集合中的Q个比特的的方式为以下之一：
仅第一次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
或者，前G1次生成的重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始，生成的所述重传数据中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D是系统允许的最大重传次数；
或者，前G2次生成的重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，生成的所述重传数据信号中包括所述校验码块集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
或者，仅奇数次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
或者，仅偶数次生成的重传数据信号中包括所述校验码块集合中的Q个比特。
可选地，所述预定条件为所述第一或第二传输节点半静态或动态配置了包编码重传模式。
本发明实施例提出一种数据传输方法及装置，将一个较大的TB划分为多个码块集合(CB Set)，每个码块集合由多个码块组成，若需要重传，可以在这些码块集合之间进行包编码，并将包编码的数据作为重传数据的一部分发送给接收端。由于包编码是基于码块集合的，包编码后产生的冗余数据包的长度只有传输块1/2甚至1/P，因此可有效减少重传的数据量，提高数据重传的效率，同时反馈信息的数量并没有增加。
本发明实施例的有益效果是，增强了重传的性能。在相关技术中，一个传输块的多个码块之间是相互独立的，所以传输块的性能受限于单个码块的性能，重传时也是如此；而本发明实施例的重传数据中，包括了码块集合的包编码的数据，包编码就是在码块之间增加了一层编码，这样多个码块之间就不再是互相独立的，而是相互关联的。如果一个码块出错，译码时就有可能通过另一个码块提供的额外信息对其进行纠错。因此重传的性能就得到提升。
因此，本发明实施例克服了相关技术的缺陷，在没有增加反馈信息数量的条件下有效降低了重传的数据量，并提升了重传性能。
附图概述
图1是TB中多个码块接收情况示意图；
图2是包编码示意图；
图3是实施例一的数据传输方法的流程示意图；
图4是实施例一、二中一个码块集合的示意图；
图5是实施例一、二的示例1中两个码块集合的示意图；
图6是实施例一、二的示例1中码块集合之间进行包编码的示意图；
图7是实施例一、二的示例1中码块之间进行包编码的示意图；
图8是实施例一、二的示例2中多个码块集合的示意图；
图9是实施例一、二的示例2中进行包编码的示意图；
图10是实施例二的装置的示意框图。
本发明的实施方式
下面将结合附图及实施例对本文的技术方案进行更详细的说明。
一种数据传输方法，应用于第一传输节点，所述方法包括：
所述第一传输节点向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据，所述传输块包括K个码块，所述K个码块分成P个码块集合；其中，K、P为正整数，K≥3，2≤P≤K；
所述第一传输节点对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；其中，所述校验码块集合的长度为T比特，M，S，T都为正整数，且2≤M≤P；
所述第一传输节点生成重传数据信号并发送给所述第二传输节点；当满足预定条件时，所述重传数据信号中至少包括所述校验码块集合中的Q个比特；其中，Q为正整数，且1≤Q≤T。
可选地，所述第一传输节点可以是但不限于，基站、中继、终端等任何具备数据接收和信令发送功能的网元。
可选地，所述第二传输节点可以是但不限于，终端、基站、中继等任何具备信令接收功能的网元。
可选地，所述P的值、以及将码块划分到码块集合中的方案可以由第一传输节点确定，也可以由第二传输节点确定后通知第一传输节点。
可选地，所述方法还包括：所述第一传输节点接收第二传输节点发送的关于所述传输块的正确(ACK)或错误(NACK)指示信息。
可选地，所述方法还包括：若所述第一传输节点到第二传输节点的传输发生在下行方向上，则所述第一传输节点通过下行控制信息指示当前传输是首次传输或者重传；
可选地，所述第一传输节点向所述第二传输节点发送重传数据信号前还包括：若所述第一传输节点到第二传输节点的传输发生在上行方向上，且所述第一传输节点检测到关于所述传输块的下行控制信息，则所述第一传输节点根据所述下行控制信息确定是否向第二传输节点发送重传数据信号。
可选地，所述第一传输节点向所述第二传输节点发送重传数据信号前还包括：若所述第一传输节点到第二传输节点的传输发生在上行方向上，且所述第一传输节点未检测到关于所述传输块的下行控制信息，则所述第一传输节点根据接收到的所述传输块的ACK或NACK指示信息确定是否向所述第二传输节点发送重传数据信号。其中，若所述第一传输节点接收到ACK信息，则不向第二传输节点发送重传数据信号，若所述第一传输节点接收到NACK信息，则向第二传输节点发送重传数据信号。
可选地，每个码块集合中的码块数目，可以通过如下方法确定：
若K能被P整除，则每个码块集合中包括K/P个码块；
若K不能被P整除，则在
Figure PCTCN2015078886-appb-000013
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000014
个码块，在
Figure PCTCN2015078886-appb-000015
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000016
个原码块和1个填充码块；其中，运算符
Figure PCTCN2015078886-appb-000017
和
Figure PCTCN2015078886-appb-000018
分别表示对x进行向上或向下取整数运算，且P1+P2＝P。
可选地，所述填充码块可以是由任何预先设定的数据构成，包括但不限于：全1比特序列或全0比特序列构成的码块，或者所述码块集合中的任一个码块。
可选地，所述填充码块可以是由任何预先设定的数据构成，包括但不限于：全1比特序列或全0比特序列构成的码块，或者所述传输块的K个码块中的任一个码块。
可选地，所述方法还包括：对所述每个码块集合中的码块(包括填充码块)进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
可选地，所述码块集合中的K个码块，可以是经过信道编码和速率匹配后的码块；
可选地，所述码块集合中的K个码块与所述传输块中的K个码块是由相同信息比特序列(或称待编码比特序列)经过信道编码器生成；
可选地，所述对P个码块集合中的M个码块集合进行包编码是指从所述P个码块集合中选择M个码块集合进行包编码，其中，选择的方法可以是但 不限于以下之一：
从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合；
所述第一、第二、第三阈值可以全部或部分相同，也可以互不相同。
可选地，所述包编码可以是指，对所述M个码块集合内具有相同索引位置的比特或符号进行编码，生成S个校验码块集合。
可选地，所述包编码还可以是，对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合；
可选地，所述编码可以是但不限于采用以下方式之一：比特异或(或称模二加法)编码、里德所罗门编码，BCH编码，数字喷泉码编码等线性编码，符号叠加编码，网络编码等。
可选地，所述包编码模块还设置为当所述M个码块集合的长度不同时，则以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同。其中，所述填充比特可以是但不限于由任何预先设定的比特序列构成，包括但不限于：全1比特序列或全0比特序列，或者所述码块集合中的任何码块中的部分比特。
可选地，所述重传数据信号中至少包括所述校验码块集合中的Q个比特可以是指：
在m次重传数据信号中，至少有一次重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；
至少有一次重传数据信号包括所述校验码块集合中的Q个比特的方式可以是，但不限于以下之一：
仅第一次重传数据信号中包括所述校验码块集合中的Q个比特；
或者，前G1次重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始，所述重传数据信号中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D是系统允许的最大重传次数；
或者，前G2次重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，所述重传数据信号中包括所述校验码块集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
或者，仅奇数次重传数据信号中包括所述校验码块集合中的Q个比特；
或者，仅偶数次重传数据信号中包括所述校验码块集合中的Q个比特。
所述第四、第五阈值可以相同，也可以不相同。
可选地，所述预定条件为所述第一传输节点或第二传输节点半静态或动态配置了包编码重传模式；
即：所述第一或第二传输节点半静态或动态配置了包编码重传模式时，所述第一传输节点发送给第二传输节点的重传数据信号中包括所述校验码块集合中的Q个比特，或者，所述重传数据信号中不包括所述校验码块集合中的比特。
本发明实施例还提供了一种装置，设置于传输节点中，包括：
发送模块，设置为向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据，所述传输块包括K个码块，所述K个码块分成P个码块集合；其中，K、P为正整数，K≥3，2≤P≤K；
包编码模块，设置为对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；其中，所述校验码块集合的长度为T比特，M，S，T都为正整数，且2≤M≤P；
重传数据生成模块，设置为生成重传数据信号，并通过所述发送模块发送到所述第二传输节点。所述重传数据信号中至少包括所述校验码块集合中的Q个比特。其中，Q为正整数，且1≤Q≤T。
可选地，所述传输节点可以是但不限于，基站、中继、终端等任何具备数据接收和信令发送功能的网元；
可选地，所述第二传输节点可以是但不限于，终端、基站、中继等任何具备信令接收功能的网元。
可选地，所述装置还包括码块集合划分模块：设置为将所述K个码块划分到P个码块集合中；
可选地，每个码块集合中的码块数目，可以通过如下方法确定：
若K能被P整除，则每个码块集合中包括K/P个码块；
若K不能被P整除，则在
Figure PCTCN2015078886-appb-000019
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000020
个码块，在
Figure PCTCN2015078886-appb-000021
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000022
个原码块和1个填充码块；其中，运算符
Figure PCTCN2015078886-appb-000023
和
Figure PCTCN2015078886-appb-000024
分别表示对x进行向上或向下取整数运算，且P1+P2＝P。
可选地，所述填充码块可以是由任何预先设定的数据构成，包括但不限于全1比特序列或全0比特序列构成的码块，或者所述码块集合中的任一个码块。
可选地，所述填充码块可以是由任何预先设定的数据构成，包括但不限于全1比特序列或全0比特序列构成的码块，或者所述传输块的K个码块中的任一个码块。
可选地，所述装置还可以包括：
级联模块，设置为对所述每个码块集合中的码块(包括填充码块)进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
可选地，所述码块集合中的K个码块，可以是经过信道编码和速率匹配后的码块；
可选地，所述码块集合中的K个码块与所述传输块中的K个码块是由相同信息比特序列(或称待编码比特序列)经过信道编码器生成；
可选地，所述包编码模块对P个码块集合中的M个码块集合进行包编码是指从所述P个码块集合中选择M个码块集合进行包编码，其中，选择的方 法可以是但不限于以下之一：
从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合；
所述第一、第二、第三阈值可以全部或部分相同，也可以互不相同。
可选地，所述包编码模块进行包编码是指，所述包编码模块对所述M个码块集合内具有相同索引位置的比特或符号进行编码，生成S个校验码块集合；
可选地，所述包编码模块进行包编码还可以是指，所述包编码模块对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合；
可选地，所述包编码模块进行编码可以是但不限于采用以下方式之一：比特异或(或称模二加法)编码、里德所罗门编码，BCH编码，数字喷泉码编码等线性编码，符号叠加编码，网络编码等。
可选地，如果所述M个码块集合的长度不同，则以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同。其中，所述填充比特可以但不限于是由任何预先设定的比特序列构成，包括但不限于：全1比特序列或全0比特序列，或者所述码块集合中的任何码块中的部分比特。
可选地，所述重传数据信号中至少包括所述校验码块集合中的Q个比特可以是指：
所述重传数据模块生成的m次重传数据信号中，至少有一次生成的重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；至少有一次生成的重传数据信号包括所述校验码块集合中的Q个比特的方式可以是，但不限于以下之一：
仅第一次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
或者，前G1次生成的重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始生成的所述重传数据中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D是系统允许的最大重传次数；
或者，前G2次生成的重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，生成的所述重传数据信号中包括所述校验码块集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
或者，仅奇数次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
或者，仅偶数次生成的重传数据信号中包括所述校验码块集合中的Q个比特。
所述第四、第五阈值可以相同，也可以不相同。
可选地，所述预定条件为所述第一或第二传输节点半静态或动态配置了包编码重传模式；即，所述第一传输节点发送给第二传输节点的重传数据信号中包括所述校验码块集合中的Q个比特，或者，所述重传数据信号中不包括所述校验码块集合中的比特。
下面结合实施例对本发明做进一步的详细说明。
实施例一(重传方法实施例)：
本实施例提出一种数据传输方法，应用于第一传输节点，如图3所示，包括：
步骤101：第一传输节点向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据，所述传输块包括K个码块，并且所述K个码块分成P个码块集合。其中，K、P为正整数，K≥3，2≤P≤K；
步骤102：所述第一传输节点对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合。其中，所述校验码块集合的长度为T比 特，M，S，T都为正整数，且2≤M≤P。
步骤103：所述第一传输节点向所述第二传输节点发送重传数据信号，其中至少包括所述校验码块集合中的Q个比特。其中，Q为正整数，且1≤Q≤T。
其中，所述第一传输节点为基站或中继，所述第二传输节点为终端；或者，所述第一传输节点为终端，第二传输节点为基站或中继。
其中，每个码块集合中的码块数目可以通过如下方法确定：
若K能被P整除，则每个码块集合中包括K/P个码块；
若K不能被P整除，则在
Figure PCTCN2015078886-appb-000025
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000026
个码块，在
Figure PCTCN2015078886-appb-000027
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000028
个原码块和1个填充码块；其中，运算符
Figure PCTCN2015078886-appb-000029
和
Figure PCTCN2015078886-appb-000030
分别表示对x进行向上或向下取整数运算，且P1+P2＝P。
这里，所述填充码块可以由任意预先设定的比特序列构成，包括但不限于如下方式之一构成：
方式一：全1比特序列或全0比特序列构成的码块；
方式二：所述K个原码块中的一个码块。
其中，所述方法还包括，将划分到每个码块集合中的码块(包括填充码块)进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
本发明实施例中，设所述的码块集合中包括t个码块，其中第i个码块的比特序列的长度为Ni比特，第i个码块的比特序列可写成
Figure PCTCN2015078886-appb-000031
其中
Figure PCTCN2015078886-appb-000032
表示所述码块集合中第i个码块的第Ni个比特，则进行所述码块级联后，所述的码块集合可以写成：
Figure PCTCN2015078886-appb-000033
对第一个码块集合进行所述码块级联后的比特序列重新索引后可以写成
Figure PCTCN2015078886-appb-000034
其中
Figure PCTCN2015078886-appb-000035
表示所述第一个码块集合中的第N’个比特，i、t、Ni、N’为正整数，且1≤i≤t，
Figure PCTCN2015078886-appb-000036
例如，第一个码块集合可以表示为如图4所示的形式。其中
Figure PCTCN2015078886-appb-000037
表示第一个码块集合中的第t个码块。
可选地，所述码块集合中的K个码块(非填充码块)，可以是经过信道编码和速率匹配后的码块；
可选地，所述码块集合中的K个码块与所述传输块中的K个码块是由相同的信息比特序列经过信道编码生成；
可选地，在可应用本实施例的通信系统中，第一传输节点对传输块进行信道编码和速率匹配后再发送给第二传输节点，其方法如下：
当传输块(TB)块的大小超过规定的门限时，所述第一传输节点先将传输块分割成K个码块(CB)，并对每个码块的信息比特序列(或称待编码比特序列)分别进行信道编码，信道编码可以采用Turbo码，或者低密度奇偶校验码(LDPC码)等编码方式；
采用一个固定的码率R0作为信道编码的母码码率，以码率R0对每个码块进行信道编码，并将产生的编码后码字比特序列作为母码放置在缓存中。假设第i个码块的信息比特长度为Li比特，则母码的长度为N0＝Li/R0比特。在实际应用中，缓存可以是虚拟的缓存，并通过寻址操作实现虚拟的交织和速率匹配功能；
所述第一传输节点向所述第二传输节点发送数据时，需要根据信道条件确定实际的传输码率。假设当前的传输码率为R1，则第i个码块的待发送比特序列的长度为N1＝Li/R1比特。速率匹配的作用就是从长度为N0比特的母码中选取N1个待发送比特。第一传输节点将K个码块的待发送比特序列级联起来就构成了实际发送给第二传输节点的传输块。
当第二传输节点未能正确接收第一传输节点发送的传输块时，第二传输节点向第一传输节点反馈错误的指示信息(NACK)。第一传输节点收到NACK信息后，向第二传输节点发送重传数据信号。对于第i个码块来说，假设重传时的传输码率为R2，则重传时的比特序列的长度为N2＝Li/R2。重传时，速率匹配的作用就是从长度为N0比特的母码中选取N2个比特。
需要说明的是，由于N1和N2可以相等或不等，并且从母码中选取待发 送比特序列的方式(例如选取待发送比特序列的起始位置等)可以相同或不同。因此，任意两次发送时，同一个码块的待发送比特序列可以相同也可以不同。
在本实施例中，所述构成传输块的K个码块的发送比特序列，与划分到P个码块集合中的K个码块的比特序列，由于分别属于首次发送和重传发送，因此，这两组比特序列可以相同也可以不同。但是，由于它们都是由相同的信息比特序列经过相同的母码编码器产生的，所以它们本质上是相同的码块。在本实施例中，认为凡是具有相同的信息比特序列，无论是否经过信道编码和速率匹配都被视为相同的码块。
可选地，所述包编码是指，对所述M个码块集合内具有相同索引位置的比特或符号的进行编码，生成S个校验码块集合；
可选地，所述包编码还可以是，对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合；
可选地，所述编码操作可以是但不限于以下方式之一：比特异或(或称模二加法)编码、生成矩阵编码、里德所罗门编码，BCH编码，数字喷泉码编码等线性编码，符号叠加编码，或者网络编码等。
可选地，在可应用本实施例的通信系统中，第一传输节点的待发送比特序列需要经过数字基带调制变成调制符号后再发送给所述第二传输节点，因此本实施例的包编码可以是比特级的包编码或者是符号级的包编码。
例如，第一传输节点在P个码块集合中选取M个码块集合进行包编码，其中M为正整数，且2≤M≤P。
其中，从P个码块集合中选取M个码块集合的方法可以是但不限于以下之一：
从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不 多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合。
如果所述M个码块集合的长度不同，则以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同。其中，所述填充比特可以但不限于是由任何预先设定的比特序列构成，包括但不限于全1比特序列或全0比特序列，或者所述码块集合中的任何码块中的部分比特。
所述比特级的包编码是指，对于所述的M个码块集合，每个码块集合的每个相同索引位置上的比特进行编码，得到所述S个校验码块集合中每个校验码块集合的对应索引位置上的比特；例如，M个码块集合中，每个码块集合的第i个比特之间进行编码，得到S个校验码块集合中每个校验码块集合的第i个比特。
所述比特级包编码可以采用比特异或(或称模二加法)编码的方式，即，在多个码块集合中具有相同索引位置的比特之间进行异或(或称模二加)运算，生成校验码块集合；所述比特级包编码还可以采用生成矩阵编码、里德所罗门编码、BCH编码、数字喷泉码编码等线性编码方法，即，将多个码块集合中具有相同索引位置的比特作为信息比特序列，对所述信息比特序列进行如上方式的编码，生成校验比特序列，多个校验比特序列中，具有相同位置索引的比特级联起来构成校验码块集合；所述比特级编码还可以采用网络编码的方式，即，对多个码块集合中具有相同索引位置的比特进行线性或非线性网络编码，生成编码后的比特序列，将多个编码后的比特序列中具有相同位置索引的比特级联起来构成校验码块集合。
所述符号级的包编码是指，对于所述的M个码块集合，每个码块集合的比特序列经过数字基带调制后可以得到相应的调制符号序列，M个码块集合的多个相同索引位置上的调制符号进行编码，得到所述S个校验码块集合中多个校验码块集合的对应索引位置上的符号；例如，M个码块集合中，每个码块集合的第i个调制符号之间进行编码，得到S个校验码块集合中，每个校验码块集合的第i个符号。
所述符号级的包编码可以采用符号叠加编码的方式，即，将在多个码块 集合中具有相同索引位置的符号进行线性叠加，生成校验符号序列，将校验符号序列中具有相同位置索引的符号级联起来构成校验码块集合；所述符号级的编码还可以采用网络编码的方式，即，对多个码块集合中具有相同索引位置的符号进行线性或非线性网络编码，生成校验符号序列，将校验符号序列中具有相同位置索引的符号级联起来构成校验码块集合；
若所述第一传输节点向所述第二传输节点发送m次重传数据信号，则所述m次重传数据信号中，至少有一次重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；方式可以是，但不限于以下之一：
仅第一次重传数据信号中包括所述校验码块集合中的Q个比特；
或者，前G1次重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始，所述重传数据信号中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D是系统允许的最大重传次数；
或者，前G2次重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，所述重传数据信号中包括所述校验码块集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
或者，仅奇数次重传数据信号中包括所述校验码块集合中的Q个比特；
或者，仅偶数次重传数据信号中包括所述校验码块集合中的Q个比特。
或者，如果所述第一或第二传输节点半静态或动态配置了包编码重传模式时，所述第一传输节点发送给第二传输节点的重传数据信号中包括所述校验码块集合中的Q个比特，或者，所述重传数据信号中不包括所述校验码块集合中的比特；
可选地，所述重传数据信号的构成包括但不限于如下方式：
方式一：所述重传数据信号仅包括所述S个校验码块集合中的Q个比特；
方式二：所述重传数据信号既包含所述S个校验码块集合中的Q个比特，也包含所述P个码块集合中的D个比特，其中D为正整数，且1≤D≤Z，其中Z是所述P个码块集合的长度。
示例一：
步骤A1：基站(或中继)向终端发送包含8个码块的传输块，其中，每个码块都有码块CRC，每个传输块也都有传输块CRC。所述传输块由K＝8个码块并且由P＝2个码块集合组成：即码块集合1和码块集合2，如图5所示，因为K能被P整除，所以每个码块集合中包含K/P＝4个码块，即：码块集合(CB set)1中包含码块CB1、CB2、CB3、CB4，码块集合2中包含码块CB5、CB6、CB7、CB8。
步骤A2：由于信道差错的影响，在所述终端侧，传输块CRC或码块CRC未能通过CRC校验，即所述终端未能正确接收到所述传输块，则所述终端向所述基站(或中继)反馈关于所述传输块的错误指示信息(NACK)。
基站对所述两个码块集合进行包编码，此时M＝P＝2，设码块集合1和码块集合2的比特序列的长度均为N’比特，包编码采用比特异或(或称模二加法)编码的方式，即，在多个码块集合中具有相同索引位置的比特之间进行异或(或称模二加)运算，如图6所示，码块集合1和码块集合2中具有相同索引位置的比特之间进行异或(或称模二加)运算：
Figure PCTCN2015078886-appb-000038
生成的校验比特级联起来
Figure PCTCN2015078886-appb-000039
构成了包编码后的数据。包编码后的数据也构成了一个码块集合，其长度为N’比特。
由于码块集合是由多个码块构成的，所以码块集合之间的包编码也可以看成是码块之间的包编码，所以，图6所示的包编码也可以表示成图7的形式，其中，CB1’，CB2’,CB3’,CB4’是包编码后的校验码块集合A中的码块。
步骤A3：所述基站(或中继)向所述终端发送重传数据信号。其中，所述基站的高层信令中半静态配置了包编码重传模式，此时重传数据信号中至少包括
Figure PCTCN2015078886-appb-000040
中的部分比特，可以是如下方式之一：
重传数据信号仅包括
Figure PCTCN2015078886-appb-000041
中的全部或部分比特；或者，重传数据信号除包括
Figure PCTCN2015078886-appb-000042
中的全部或部分比特外，还包括码块集合1或码块集合2中的部分或全部比特。
所述终端接收到所述基站(或中继)发送的重传数据信号后，利用重传数据和首次传输时接收到的数据对所述传输块解码，所述解码的方法可以是但不限于以下方式之一：
硬判决解码：对首次传输的数据和重传数据进行硬判决后，利用线性码的特性恢复首次传输中解码错误的码块；或者，
软判决解码：对首次传输的软判决信息和重传的软判决信息进行合并或者迭代解码，恢复首次传输中解码错误的码块。
示例2:
步骤B1：终端向基站(或中继)发送包含39个码块的传输块，其中，每个码块都有码块CRC，每个传输块也都有传输块CRC。
步骤B2：由于信道差错的影响，在所述基站(或中继)侧，传输块CRC或码块CRC未能通过CRC校验，即所述基站(或中继)未能正确接收到所述传输块，则所述基站(或中继)向所述终端反馈关于所述传输块的错误指示信息(NACK)。
所述终端将所述传输块的K＝39个码块划分为P＝10个码块集合：码块集合1、码块集合2，……码块集合10，因为K不能被P整除，所以在
Figure PCTCN2015078886-appb-000043
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000044
个码块，在
Figure PCTCN2015078886-appb-000045
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000046
个原码块和1个填充码块；即，在码块集合1到码块集合9中，每个码集合包含4个原码块；在码块集合10中包含3个原码块和1个填充码块，如图8所示，即：码块集合1中包含码块CB1、CB2、CB3、CB4，码块集合2中包含码块CB5、CB6、CB7、CB8……码块集合10中包含码块CB37、CB38、CB39、CB40。
其中，码块CB40表示填充码块，所述填充码块CB40可以由任意预先设定的比特序列构成，包括但不限于如下方式之一构成：
方式一：全1比特序列或全0比特序列构成的码块；
方式二：所述传输块的K个码块中的任意一个码块；
终端对所述10个码块集合中的7个码块集合进行包编码，此时M＝7；选择其中连续的7个码块进行包编码；假设包编码是在码块集合1至码块集合 7之间进行，包编码采用比特级编码的方式，如图9所示，生成了S＝3个校验码块序列，分别为校验码块集合A1、校验码块集合A2和校验码块集合A3。
包括所述校验码块集合中的部分比特，可以是如下方式之一：
重传数据信号仅包括校验码块集合A1、校验码块集合A2或者校验码块集合A3中的全部或部分比特；或者，重传数据信号除包括所述校验码块集合的全部或部分比特外，还包括码块集合1到码块集合7中的部分或全部比特。
所述终端接收到所述基站(或中继)发送的重传数据信号后，利用重传数据和首次传输时接收到的数据对所述传输块解码，所述解码的方法可以是但不限于以下方式之一：
硬判决解码：对首次传输的数据和重传数据进行硬判决后，利用线性码的特性恢复首次传输中解码错误的码块；或者，
软判决解码：对首次传输的软判决信息和重传的软判决信息进行合并或者迭代解码，恢复首次传输中解码错误的码块。
示例3：
本示例的步骤C1与示例2的步骤B1相同。
本示例的步骤C2与示例2的步骤B2的区别在于，本示例的包编码采用符号级编码方式；
本示例的步骤C3与示例2的步骤C3的区别在于，本示例的重传数据信号是以调制符号的形式呈现，其调制前对应的重传比特序列与示例2相同；
所述终端接收到所述基站(或中继)发送的重传数据信号后，利用重传数据和首次传输时接收到的数据对所述传输块解码，所述解码的方法可以是但不限于以下方式之一：
串行干扰消除解码：对重传的叠加符号进行串行干扰消除后得到M个码块集合的估计信息，再利用首次传输的数据进行硬判决或软判决解码，恢复出首次传输中解码错误的码块；
极大似然解码：对重传的叠加符号进行极大似然估计后得到M个码块集合的估计信息，再利用首次传输的数据进行硬判决或软判决解码，恢复出首 次传输中解码错误的码块；
实施例二(装置实施例)
本实施例提出一种装置，应用于第一传输节点，如图10所示，该装置包括：
发送模块，设置为向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据，所述传输块包括K个码块，所述K个码块分成P个码块集合；其中，K、P为正整数，K≥3，2≤P≤K；
包编码模块，设置为对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；其中，所述校验码块集合的长度为T比特，M，S，T都为正整数，且2≤M≤P；
重传数据生成模块，设置为生成重传数据信号，并通过所述发送模块发送到所述第二传输节点。所述重传数据信号中至少包括所述校验码块集合中的Q个比特。其中，Q为正整数，且1≤Q≤T。
这里，所述第一传输节点为基站或中继，所述第二传输节点为终端；或者，所述第一传输节点为终端，第二传输节点为基站或中继。
可选地，所述装置还包括码块集合划分模块，设置为将所述K个码块划分到P个码块集合中；
其中，每个码块集合中的码块数目，可以通过如下方法确定：
若K能被P整除，则每个码块集合中包括K/P个码块；
若K不能被P整除，则在
Figure PCTCN2015078886-appb-000047
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000048
个码块，在
Figure PCTCN2015078886-appb-000049
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000050
个原码块和1个填充码块；其中，运算符
Figure PCTCN2015078886-appb-000051
和
Figure PCTCN2015078886-appb-000052
分别表示对x进行向上或向下取整数运算，且P1+P2＝P；
这里，所述填充码块可以由任意预先设定的比特序列构成，包括但不限于如下方式之一构成：
方式一：全1比特序列或全0比特序列构成的码块；
方式二：所述K个原码块中的任一个码块。
其中，所述装置还包括：级联模块，设置为将划分到每个码块集合中的码块(包括填充码块)进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
本发明实施例中，设所述的码块集合中包括t个码块，其中第i个码块的比特序列的长度为Ni比特，第i个码块的比特序列可写成第i个码块的比特序列可写成
Figure PCTCN2015078886-appb-000053
其中
Figure PCTCN2015078886-appb-000054
表示所述码块集合中第i个码块的第Ni个比特，则进行所述码块级联后，所述的码块集合可以写成：
Figure PCTCN2015078886-appb-000055
对级联后的比特序列重新索引后可以写成
Figure PCTCN2015078886-appb-000056
其中
Figure PCTCN2015078886-appb-000057
表示所述第一个码块集合中的第N’个比特，i、t、Ni、N’为正整数，且1≤i≤t，
Figure PCTCN2015078886-appb-000058
例如，码块集合1可以表示为如图4所示的形式。其中CB1 t表示第一个码块集合中的第t个码块。
可选地，所述码块集合中的K个码块(非填充码块)，可以是经过信道编码和速率匹配后的码块：
所述码块集合中的K个码块与所述传输块中的K个码块是由相同的信息比特序列经过信道编码生成；
可选地，在可应用本实施例的通信系统中，第一传输节点对传输块进行信道编码和速率匹配后再发送给第二传输节点，其方法如下：
当传输块(TB)块的大小超过规定的门限时，所述第一传输节点先将传输块分割成K个码块(CB)，并对每个码块的信息比特序列(或称待编码比特序列)分别进行信道编码，信道编码可以采用Turbo码，或者低密度奇偶校验码(LDPC码)等编码方式；
采用一个固定的码率R0作为信道编码的母码码率，以码率R0对每个码块进行信道编码，并将产生的编码后码字比特序列作为母码放置在缓存中。假设第i个码块的信息比特长度为Li比特，则母码的长度为N0＝Li/R0比特。在实际应用中，缓存可以是虚拟的缓存，并通过寻址操作实现虚拟的交织和 速率匹配功能；
所述第一传输节点向所述第二传输节点发送数据时，需要根据信道条件确定实际的传输码率。假设当前的传输码率为R1，则第i个码块的待发送比特序列的长度为N1＝Li/R1比特。速率匹配的作用就是从长度为N0比特的母码中选取N1个待发送比特。第一传输节点将K个码块的待发送比特序列级联起来就构成了实际发送给第二传输节点的传输块。
当第二传输节点未能正确接收第一传输节点发送的传输块时，第二传输节点向第一传输节点反馈错误的指示信息(NACK)。第一传输节点收到NACK信息后，向第二传输节点发送重传数据信号。对于第i个码块来说，假设重传时的传输码率为R2，则重传时的比特序列的长度为N2＝Li/R2。重传时，速率匹配的作用就是从长度为N0比特的母码中选取N2个比特。
需要说明的是，由于N1和N2可以相等或不等，并且从母码中选取待发送比特序列的方式(例如选取待发送比特序列的起始位置等)可以相同或不同。因此，任意两次发送时，同一个码块的待发送比特序列可以相同也可以不同。
在本实施例中，所述构成传输块的K个码块的发送比特序列，与划分到P个码块集合中的K个码块的比特序列，由于分别属于首次发送和重传发送，因此，这两组比特序列可以相同也可以不同。但是，由于它们都是由相同的信息比特序列经过相同的母码编码器产生的，所以它们本质上是相同的码块。在本实施例中，认为凡是具有相同的信息比特序列，无论是否经过信道编码和速率匹配都被视为相同的码块。
可选地，所述包编码是指，对所述M个码块集合内具有相同索引位置的比特或符号的进行编码，生成S个校验码块集合；
可选地，所述包编码还可以是，对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合；
可选地，所述编码操作可以是但不限于以下方式之一：比特异或(或称模二加法)编码、生成矩阵编码、里德所罗门编码，BCH编码，数字喷泉码 编码等线性编码，符号叠加编码，或者网络编码等。
可选地，在可应用本实施例的通信系统中，第一传输节点的待发送比特序列需要经过数字基带调制变成调制符号后再发送给所述第二传输节点，因此本实施例的包编码可以是比特级的包编码或者是符号级的包编码。
例如，所述包编码模块在P个码块集合中选取M个码块集合进行包编码，其中M为正整数，且2≤M≤P。
其中，从P个码块集合中选取M个码块集合的方法可以是但不限于以下之一：
从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合；
如果所述M个码块集合的长度不同，则所述包编码模块以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同。其中，所述填充比特可以是由任何但不限于任何预先设定的比特序列构成，包括但不限于全1比特序列或全0比特序列构成的码块，或者所述码块集合中的任何码块中的部分比特：
所述比特级的包编码是指，对于所述的M个码块集合，每个码块集合的每个相同索引位置上的比特进行编码，得到所述S个校验码块集合中每个校验码块集合的对应索引位置上的比特；例如，M个码块集合中，每个码块集合的第i个比特之间进行编码，得到S个校验码块集合中每个校验码块集合的第i个比特。
所述比特级包编码可以采用比特异或(或称模二加法)编码的方式，即，在多个码块集合中具有相同索引位置的比特之间进行异或(或称模二加)运算，生成校验码块集合；所述比特级包编码还可以采用生成矩阵编码、里德所罗门编码、BCH编码、数字喷泉码编码等线性编码方法，即，将多个码块 集合中具有相同索引位置的比特作为信息比特序列，对所述信息比特序列进行如上方式的编码，生成校验比特序列，多个校验比特序列中，具有相同位置索引的比特级联起来构成校验码块集合；所述比特级编码还可以采用网络编码的方式，即，对多个码块集合中具有相同索引位置的比特进行线性或非线性网络编码，生成编码后的比特序列，将多个编码后的比特序列中具有相同位置索引的比特级联起来构成校验码块集合；
所述符号级的包编码是指，对于所述的M个码块集合，每个码块集合的比特序列经过数字基带调制后可以得到相应的调制符号序列，M个码块集合的多个相同索引位置上的调制符号进行编码，得到所述S个校验码块集合中多个校验码块集合的对应索引位置上的符号；例如，M个码块集合中，每个码块集合的第i个调制符号之间进行编码，得到S个校验码块集合中，每个校验码块集合的第i个符号。
所述符号级的包编码可以采用符号叠加编码的方式，即，将在多个码块集合中具有相同索引位置的符号进行线性叠加，生成校验符号序列，将校验符号序列中具有相同位置索引的符号级联起来构成校验码块集合；所述符号级的编码还可以采用网络编码的方式，即，对多个码块集合中具有相同索引位置的符号进行线性或非线性网络编码，生成校验符号序列，将校验符号序列中具有相同位置索引的符号级联起来构成校验码块集合；
若所述第一传输节点向所述第二传输节点发送m次重传数据信号，则所述重传数据生成模块所生成的m次重传数据信号中，至少有一次生成的重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；方式可以是，但不限于以下之一：
仅第一次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
或者，前G1次生成的重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始，生成的所述重传数据信号中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D是系统允许的最大重传次数；
或者，前G2次生成的重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，生成的所述重传数据信号中包括所述校验码块 集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
或者，仅奇数次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
或者，仅偶数次生成的重传数据信号中包括所述校验码块集合中的Q个比特。
或者，如果所述第一或第二传输节点半静态或动态配置了包编码重传模式时，所述第一传输节点发送给第二传输节点的重传数据信号中包括所述校验码块集合中的Q个比特，或者，所述重传数据信号中不包括所述校验码块集合中的比特。
可选地，所述重传数据信号的构成包括但不限于如下方式：
方式一：所述重传数据信号仅包括所述S个校验码块集合中的Q个比特；
方式二：所述重传数据信号既包含所述S个校验码块集合中的Q个比特，也包含所述P个码块集合中的D个比特，其中D为正整数，且1≤D≤Z，其中Z是所述P个码块集合的长度。
示例1：
本示例与示例1的区别在于，本示例中基站包括：发送模块，包编码模块和重传数据生成模块。
其中，发送模块：设置为向终端节点发送首次传输的8个码块的传输块信号，所述传输块由P＝2个码块集合组成；所述码块集合1和码块集合2中分别包括4个码块；如图5所示。
包编码模块：基站对所述两个码块集合进行包编码，此时M＝P＝2，设码块集合1和码块集合2的比特序列的长度均为N’比特，包编码采用比特异或(或称模二加法)编码的方式，即，在多个码块集合中具有相同索引位置的比特之间进行异或(或称模二加)运算，如图6所示，码块集合1和码块集合2中具有相同索引位置的比特之间进行异或(或称模二加)运算:
Figure PCTCN2015078886-appb-000059
生成的校验比特级联起来
Figure PCTCN2015078886-appb-000060
构成了包编码后的数据。包编码后的数据也构成了一个码块集合，其长度为N’比特。
由于码块集合是由多个码块构成的，所以码块集合之间的包编码也可以看成是码块之间的包编码，所以，图6所示的包编码也可以表示成图7的形式，其中，CB1’，CB2’,CB3’,CB4’是包编码后的校验码块集合A中的码块。
重传数据生成模块：所述基站(或中继)生成向所述终端发送重传数据信号。其中，所述基站的高层信令中半静态配置了包编码重传模式，此时重传数据信号中至少包括
Figure PCTCN2015078886-appb-000061
中的部分比特，可以是如下方式之一：
重传数据信号仅包括
Figure PCTCN2015078886-appb-000062
中的全部或部分比特；或者，重传数据信号除包括
Figure PCTCN2015078886-appb-000063
中的全部或部分比特外，还包括码块集合1或码块集合2中的部分或全部比特。
发送模块：基站通过发送模块将所述重传数据信号发送给终端。
所述终端接收到所述基站(或中继)发送的重传数据信号后，利用重传数据和首次传输时接收到的数据对所述传输块解码，所述解码的方法可以是但不限于以下方式之一：
硬判决解码：对首次传输的数据和重传数据进行硬判决后，利用线性码的特性恢复首次传输中解码错误的码块；或者，
软判决解码：对首次传输的软判决信息和重传的软判决信息进行合并或者迭代解码，恢复首次传输中解码错误的码块。
示例2：
在本示例中所述基站为第一传输节点，所述终端为第二传输节点。
所述基站包括：发送模块，码块集合划分模块、包编码模块和重传数据生成模块。
所述基站的发送模块向终端发送包含39个码块的传输块信号，其中，每个码块都有码块CRC，每个传输块也都有传输块CRC。
在所述终端侧，传输块CRC或码块CRC未能通过CRC校验，即所述基站(或中继)未能正确接收到所述传输块，则所述终端向所述基站反馈关于所述传输块的错误指示信息(NACK)。
所述基站的码块集合划分模块将所述传输块的K＝39个码块划分为P＝10个码块集合：码块集合1、码块集合2，……码块集合10，因为K不能被P整除，所以在
Figure PCTCN2015078886-appb-000064
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000065
个码块，在
Figure PCTCN2015078886-appb-000066
个码块集合中，每个码块集合包括
Figure PCTCN2015078886-appb-000067
个原码块和1个填充码块；即，在码块集合1到码块集合9中，每个码集合包含4个原码块；在码块集合10中包含3个原码块和1个填充码块，如图8所示。
其中，码块CB40表示填充码块，所述填充码块CB40可以由任意预先设定的比特序列构成，包括但不限于如下方式之一构成：
方式一：全1比特序列或全0比特序列构成的码块；
方式二：所述传输块的K个码块中的任意一个码块；
所述基站的包编码模块对所述10个码块集合中的7个码块集合进行包编码，此时M＝7；假设包编码是在码块集合1至码块集合7之间进行，包编码采用比特级编码的方式，如图9所示，生成了S＝3个校验码块序列，分别为校验码块集合A1、校验码块集合A2和校验码块集合A3。
所述基站的重传数据生成模块设置为生成向所述终端发送的重传数据信号。其中，重传数据信号中至少包括所述校验码块集合中的部分比特，可以是如下方式之一：
重传数据信号仅包括校验码块集合A1、校验码块集合A2或者校验码块集合A3中的全部或部分比特；或者，重传数据信号除包括所述校验码块集合的全部或部分比特外，还包括码块集合1到码块集合7中的部分或全部比特。
所述基站的发送模块，设置为将所述重传数据信号发送给所述终端。
所述终端接收到所述基站(或中继)发送的重传数据信号后，利用重传数据和首次传输时接收到的数据对所述传输块解码，所述解码的方法可以是但不限于以下方式之一：
硬判决解码：对首次传输的数据和重传数据进行硬判决后，利用线性码的特性恢复首次传输中解码错误的码块；或者，
软判决解码：对首次传输的软判决信息和重传的软判决信息进行合并或者迭代解码，恢复首次传输中解码错误的码块。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。
上述实施例中的各装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的各装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
工业实用性
本发明实施例增强了重传的性能。本发明实施例的重传数据中，包括了码块集合的包编码的数据，包编码就是在码块之间增加了一层编码，这样多个码块之间就不再是互相独立的，而是相互关联的。如果一个码块出错，译码时就有可能通过另一个码块提供的额外信息对其进行纠错。因此重传的性能就得到提升。本发明实施例在没有增加反馈信息数量的条件下有效降低了重传的数据量，并提升了重传性能。

Claims (23)

  1. 一种数据传输方法，所述方法包括：
    第一传输节点向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据，所述传输块包括K个码块，所述K个码块划分到P个码块集合中；其中，K、P为正整数，K≥3，2≤P≤K；
    所述第一传输节点对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；其中，所述校验码块集合的长度为T比特，M，S，T都为正整数，且2≤M≤P；以及，
    所述第一传输节点生成重传数据信号并发送给所述第二传输节点；当满足预定条件时，所述重传数据信号中至少包括所述校验码块集合中的Q个比特；其中，Q为正整数，且1≤Q≤T。
  2. 如权利要求1所述的方法，其中，每个码块集合中的码块数目确定如下：
    K能被P整除时，每个码块集合中包括K/P个码块；
    K不能被P整除时，在
    Figure PCTCN2015078886-appb-100001
    个码块集合中，每个码块集合包括
    Figure PCTCN2015078886-appb-100002
    个码块，在
    Figure PCTCN2015078886-appb-100003
    个码块集合中，每个码块集合包括
    Figure PCTCN2015078886-appb-100004
    个原码块和1个填充码块；其中，运算符
    Figure PCTCN2015078886-appb-100005
    和
    Figure PCTCN2015078886-appb-100006
    分别表示对x进行向上或向下取整数运算，且P1+P2＝P。
  3. 如权利要求2所述的方法，其中，所述填充码块由任何预先设定的数据构成，包括：全1比特序列或全0比特序列构成的码块，或者所述码块集合中的任一个码块，或者所述传输块的K个码块中的任一个码块。
  4. 如权利要求1所述的方法，还包括：
    所述第一传输节点对所述每个码块集合中的码块进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
  5. 如权利要求1所述的方法，其中，所述码块集合中的K个码块是经 过信道编码和速率匹配后的码块；
    所述码块集合中的K个码块与所述传输块中的K个码块是由相同信息比特序列经过信道编码器生成。
  6. 如权利要求1所述的方法，其中，所述对P个码块集合中的M个码块集合进行包编码是指从所述P个码块集合中选择M个码块集合进行包编码，其中，选择的方法包括以下之一：
    从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合。
  7. 如权利要求1所述的方法，其中，所述包编码是指：
    对所述M个码块集合内具有相同索引位置的比特或符号进行编码，生成S个校验码块集合；或者，
    对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合。
  8. 如权利要求7所述的方法，其中，所述编码采用以下方式之一：比特异或编码、里德所罗门编码，BCH编码，数字喷泉码编码等线性编码，符号叠加编码，网络编码。
  9. 如权利要求7所述的方法，其中，当所述M个码块集合的长度不同时，以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同；其中，所述填充比特由任何预先设定的比特序列构成，包括：全1比特序列或全0比特序列，或者所述码块集合中的任何码块中的部分比特。
  10. 如权利要求1所述的方法，其中，所述重传数据信号中至少包括所 述校验码块集合中的Q个比特是指：
    在m次重传数据信号中，至少有一次重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；
    所述至少有一次重传数据信号包括所述校验码块集合中的Q个比特的方式包括以下任一种：
    仅第一次重传数据信号中包括所述校验码块集合中的Q个比特；
    或者，前G1次重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始，所述重传数据信号中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D是系统允许的最大重传次数；
    或者，前G2次重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，所述重传数据信号中包括所述校验码块集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
    或者，仅奇数次重传数据信号中包括所述校验码块集合中的Q个比特；
    或者，仅偶数次重传数据信号中包括所述校验码块集合中的Q个比特。
  11. 如权利要求1所述的方法，其中：所述预定条件为所述第一传输节点或第二传输节点半静态或动态配置了包编码重传模式。
  12. 一种数据传输装置，设置于传输节点中，包括：
    发送模块，设置为向第二传输节点发送首次传输的数据信号，其中，所述数据信号包括至少一个传输块的数据所述传输块包括K个码块，所述K个码块分成P个码块集合；其中，K、P为正整数，K≥3，2≤P≤K；
    包编码模块，设置为对所述P个码块集合中的M个码块集合进行包编码，得到S个校验码块集合；其中，所述校验码块集合的长度为T比特，M，S，T都为正整数，且2≤M≤P；以及，
    重传数据生成模块，设置为生成重传数据信号，并通过所述发送模块发送到所述第二传输节点；所述重传数据信号中至少包括所述校验码块集合中 的Q个比特；其中，Q为正整数，且1≤Q≤T。
  13. 如权利要求12所述的装置，还包括：
    码块集合划分模块，设置为将所述K个码块划分到P个码块集合中；每个码块集合中的码块数目确定如下：
    K能被P整除时，每个码块集合中包括K/P个码块；
    K不能被P整除时，在
    Figure PCTCN2015078886-appb-100007
    个码块集合中，每个码块集合包括
    Figure PCTCN2015078886-appb-100008
    个码块，在
    Figure PCTCN2015078886-appb-100009
    个码块集合中，每个码块集合包括
    Figure PCTCN2015078886-appb-100010
    个原码块和1个填充码块；其中，运算符
    Figure PCTCN2015078886-appb-100011
    和
    Figure PCTCN2015078886-appb-100012
    分别表示对x进行向上或向下取整数运算，且P1+P2＝P。
  14. 如权利要求12所述的装置，其中，所述填充码块由任何预先设定的数据构成，包括：全1比特序列或全0比特序列构成的码块，或者所述码块集合中的任一个码块，或者所述传输块的K个码块中的任一个码块。
  15. 如权利要求12所述的装置，还包括：
    级联模块，设置为对所述每个码块集合中的码块进行码块级联；其中，所述码块级联是指，将码块集合中的全部码块的比特序列串联起来。
  16. 如权利要求12所述的装置，其中，
    所述码块集合中的K个码块是经过信道编码和速率匹配后的码块；
    所述码块集合中的K个码块与所述传输块中的K个码块是由相同信息比特序列经过信道编码器生成。
  17. 如权利要求12所述的装置，其中，所述包编码模块对P个码块集合中的M个码块集合进行包编码是指从所述P个码块集合中选择M个码块集合进行包编码，其中，选择的方法包括以下之一：
    从P个码块集合中选择连续的M个码块集合；或者，从P个码块集合中选择等间隔的M个码块集合；或者，从P个码块集合中随机选择M个码块集合；或者，从P个码块集合中选择包含错误码块数量不少于预先设定的第一阈值的M个码块集合；或者，从P个码块集合中选择包含错误码块数量不 多于预先设定的第二阈值的M个码块集合；或者，从P个码块集合中选择相同索引位置上的错误码块数不超过预先设定的第三阈值的M个码块集合。
  18. 如权利要求12所述的装置，其中，所述包编码模块进行包编码是指：
    所述包编码模块对所述M个码块集合内具有相同索引位置的比特或符号进行编码，生成S个校验码块集合；或者，
    所述包编码模块对所述M个码块集合的码块、比特或符号分别进行循环移位或交织后，再对具有相同索引位置的比特或符号进行编码，生成S个校验码块集合。
  19. 如权利要求18所述的装置，其中，所述包编码模块进行编码采用以下方式之一：比特异或编码、里德所罗门编码，BCH编码，数字喷泉码编码等线性编码，符号叠加编码，网络编码。
  20. 如权利要求18所述的装置，其中，所述包编码模块还设置为当所述M个码块集合的长度不同时，以最长的码块集合的长度为基准，在其他的码块集合内添加填充比特，填充后所有M个码块集合的长度均相同；其中，所述填充比特由任何预先设定的比特序列构成，包括：全1比特序列或全0比特序列，或者所述码块集合中的任何码块中的部分比特。
  21. 如权利要求12所述的装置，其中，所述重传数据信号中至少包括所述校验码块集合中的Q个比特是指：
    所述重传数据模块生成的m次重传数据信号中，至少有一次生成的重传数据信号包括所述校验码块集合中的Q个比特，其中m为正整数；
    其中，至少有一次生成的重传数据信号包括所述校验码块集合中的Q个比特的的方式包括以下之一：
    仅第一次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
    或者，前G1次生成的重传数据信号中包括所述校验码块集合中的Q个比特，从第G1+1次重传开始，生成的所述重传数据中不包括所述校验码块集合中的比特；其中G1为预先设定的第四阈值，G1为正整数，且1≤G1≤D，其中D是系统允许的最大重传次数；
    或者，前G2次生成的重传数据信号中不包括所述校验码块集合中的比特，从第G2+1次重传开始，生成的所述重传数据信号中包括所述校验码块集合中的Q个比特；其中G2为预先设定的第五阈值，G2为正整数，且1≤G2≤D，其中D是系统允许的最大重传次数；
    或者，仅奇数次生成的重传数据信号中包括所述校验码块集合中的Q个比特；
    或者，仅偶数次生成的重传数据信号中包括所述校验码块集合中的Q个比特。
  22. 如权利要求12所述的装置，其中，所述预定条件为所述第一或第二传输节点半静态或动态配置了包编码重传模式。
  23. 一种计算机可读存储介质，存储有程序指令，当该程序指令被执行时可实现权利要求1-11任一项所述的方法。
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