CN105306166B - The receiving handling method and device of code block - Google Patents
The receiving handling method and device of code block Download PDFInfo
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- CN105306166B CN105306166B CN201410323515.5A CN201410323515A CN105306166B CN 105306166 B CN105306166 B CN 105306166B CN 201410323515 A CN201410323515 A CN 201410323515A CN 105306166 B CN105306166 B CN 105306166B
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Abstract
The invention discloses the receiving handling method and device of a kind of code block, this method includes：Terminal receives the signal that base station is sent, and signal described in the terminal-pair carries out the code block segmentation of symbol level；Each code symbol in the block after segmentation described in the terminal-pair carries out identical demodulation scramble process；Bit sequence after each code block scramble process described in the terminal-pair carries out bit-level processing, forms the transmission block sequence of reception.This method combines by using processing based on code block such as the solution rate-matched based on the demodulation scramble process of code block level and bit-level, channel decodings, so as to simplify and reduce the treating capacity of system, this method applies also for the Parallel processing designs under hardware environment.
Description
Technical field
The present invention relates to the communications field, and in particular to the receiving handling method and device of a kind of code block.
Background technology
New transmission mode is introduced in current LTE system, in downlink, the transmission antenna based on double codebook structures
Precoding, maximum can support 8 layers of SU-MIMO, and corresponding transmission block bit number increases to maximum 299856 bits.Modulation system
Also the higher order modulation mode for supporting 256QAM is expanded to by QPSK, 16QAM, 64QAM, corresponding transmission block bit number also increases
To maximum 391656 bits.
The processing of the bit-level of LTE system is generally encoded using Turbo, and the maximum input bit length of Turbo code is limited
It is set to 6144 bits.Due to there is a situation where that transmission block bit number is more than 6144 bits, code block point is employed in LTE system
Cut technology, i.e., by calculate " the code block number that transmission block bit number/6144 " are split, based on code block number to transmission block into
Row code block segmentation, each code bit number in the block after segmentation are less than or equal to 6144 bits, for the processing of Turbo coding and decodings.
Fig. 1 is Physical Downlink Shared Channel (Physical Downlink Shared Channel, the abbreviation of LTE system：
PDSCH downlink reception FB(flow block)), wherein, handled by channel estimation, detection etc., carry out being based on code block to receiving symbol
The demodulation scramble process of the whole transmission block of tandem states, carries out code block segmentation processing afterwards, each code block after segmentation into
Row solution rate-matched, HARQ soft mergings, channel decoding, code block cyclic redundancy check code (Cyclic Redundancy Check,
Referred to as：CRC) error detection etc. is handled.All code blocks are finally subjected to code block cascade processing, exports and transmits by transmission block CRC error detections
Block bit.
In LTE system, the code block processing of existing receiving terminal is only carried out in bit-level, and it is based on whole to descramble, demodulate
What transport block length was handled.The downlink maximum of LTE system can support 8 layers of SU-MIMO, corresponding TBS bit numbers
Value increases to maximum 299856 bits, and modulation system also supports the higher order modulation mode of 256QAM, corresponding TBS bit values
It is also added to maximum 391656 bits.For so big transmission block, its treating capacity will greatly increase.For example, for adding
For the treated length disturbed/descrambled, between 256QAM and existing 64QAM modulation systems under comparable situation, solution during 256QAM
30% or so more than treating capacity when the treating capacity disturbed is than 64QAM.For the processing of demodulation, symbol tune during due to 256QAM
Bit wide processed is 8 bits, and compared with symbol-modulated when 64QAM, its treating capacity demodulated adds 3 times or so.
Since the processing of existing descrambling and demodulation is handled based on whole transport block length, with LTE system
The treating capacity of the complication of configuration, descrambling and demodulation is stepped up, and is unfavorable for the real-time processing of system so that the hardware of system is real
It is existing comparatively laborious.
The content of the invention
For in the prior art the defects of, the present invention provides a kind of receiving handling method and device of code block, simplifies and subtracts
The treating capacity of code block in system is lacked.
In a first aspect, the present invention provides a kind of receiving handling method of code block, this method includes：
Terminal receives the signal that base station is sent, and the code block segmentation of symbol level is carried out to the signal；
Each code symbol in the block after segmentation described in the terminal-pair carries out identical demodulation scramble process；
Bit sequence after each code block scramble process described in the terminal-pair carries out bit-level processing, forms the biography of reception
Defeated piece of sequence.
Optionally, the code block segmentation of symbol level is carried out to the signal, including：
If modulation symbol number M is not more than the decollator number Z of code block, the segmentation number C of code block is 1；
If modulation symbol number M is more than the decollator number Z of the code block, the segmentation number of the code block
Wherein, modulation symbol number M=K/Q, K be base station send signal transmission block bit number, Q for respectively with QPSK,
The corresponding modulation bit number of 16QAM, 64QAM, 256QAM, Q=2,4,6 or 8, the decollator number Z=6144/Q of code block.
Optionally, identical demodulation is carried out to each code symbol in the block after the segmentation, is specially：
Using a kind of demodulation mode in QPSK, 16QAM, 64QAM and 256QAM to each code block after the segmentation
In symbol be demodulated.
Optionally, identical demodulation scramble process is carried out to each code symbol in the block after the segmentation, including：
Scramble process is carried out to the output sequence after each code symbol demodulation processing in the block, obtains bit sequence；
Wherein, the length of bit sequence is equal to the corresponding bit number of code block of demodulated processing.
Optionally, the bit-level processing includes：
Solution rate-matched, HARQ soft mergings, channel decoding are carried out to the bit sequence after each code block scramble process
Handled with CRC error detections；
After the completion of each code block CRC error detections processing, the code block cascade processing of bit-level is carried out, forms complete pass
Defeated piece of sequence；
CRC error detection processing is carried out to the complete transmission block sequence；
After the completion of carrying out CRC error detection processing to the complete transmission block sequence, the transmission block sequence of reception is formed.
Optionally, after the completion of to each code block CRC error detections processing, after the code block cascade processing for carrying out bit-level,
Formed before the transmission block sequence received, the method further includes：
If after the completion of each code block CRC error detections processing, the code block CRC error detection situations of all code blocks, shape are recorded
The first flag sequence for being code block number C into a length, wherein " 0 " represents the code block inerrancy, it is wrong that " 1 " represents the code block
By mistake.
Optionally, the method further includes：
When there is the code block for being identified as 1 in the mark sequence, the terminal receives the signal that base station retransmits, right
The signal retransmitted is formed before the transmission block sequence received,
Form the second identifier sequence that length is code block number C, if in second identifier sequence some code block mark
For " 0 ", then processed correct data is received using before the signal retransmitted is received, without any processing；
If some code block is identified as " 1 ", demodulation, descrambling and follow-up bit-level are re-started to the erroneous block
Processing.
Second aspect, present invention also offers a kind of receiving and processing device of code block, which includes：Code block segmentation list
Member, demodulation Descrambling unit, code block bit-level processing unit；
The code block segmentation unit, for receiving the signal of base station transmission, carries out the signal code block point of symbol level
Cut；
The demodulation Descrambling unit, conciliates for carrying out identical demodulation to each code symbol in the block after the segmentation
Disturb processing；
The code block bit-level processing unit, for carrying out bit to the bit sequence after each code block scramble process
Level processing, forms the transmission block sequence of reception.
Optionally, the code block bit-level processing unit includes：Code block processing unit, code block concatenation unit, transmission block inspection
Wrong processing unit and transmission block sequence receiving unit；
The code block processing unit, for carrying out solution speed to the bit sequence after each code block scramble process
Match somebody with somebody, HARQ soft mergings, channel decoding and CRC error detections processing；
The code block concatenation unit, after the completion of each code block CRC error detections processing, carries out the code block cascade of bit-level
Processing, forms complete transmission block sequence；
The transmission block error detection processing unit, for carrying out CRC error detection processing to the complete transmission block sequence；
Transmission block sequence receiving unit, after the completion of carrying out CRC error detection processing to the complete transmission block sequence, shape
Into the transmission block sequence of reception.
Optionally, the code block bit-level processing unit further includes code block retransmission unit；
The code block retransmission unit, for after the completion of each code block CRC error detections processing, recording this all code block
Code block CRC error detection situations, form the mark sequence that length is code block number C, wherein " 0 " represents the code block inerrancy,
It is wrong that " 1 " represents the code block.
As shown from the above technical solution, the present invention proposes the receiving handling method and device of a kind of code block, by base
The signal sent of standing carries out the code block segmentation of symbol level, and carrying out identical demodulation to each code symbol in the block after segmentation conciliates
Disturb processing so that the time of whole system processing adds block, simplifies and reduce the treating capacity of system, to handling in real time for system
Great role.
Brief description of the drawings
Fig. 1 is the downlink reception FB(flow block) of the PDSCH channels of LTE system；
Fig. 2 is the receiving handling method flow diagram for the code block that one embodiment of the invention is mentioned；
Fig. 3 is the downlink reception FB(flow block) for the PDSCH channels that one embodiment of the invention provides；
Fig. 4 A- Fig. 4 B are the receiving and processing device schematic diagram for the code block that another embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of invention is further described.Following embodiments are only used for more clear
Illustrate to Chu technical scheme, and be not intended to limit the protection scope of the present invention and limit the scope of the invention.
Fig. 2 shows a kind of receiving handling method flow diagram of the code block present embodiments provided, as shown in Fig. 2,
This method comprises the following steps：
101st, terminal receives the signal that base station is sent, and the code block segmentation of symbol level is carried out to the signal；
For example, above-mentioned steps 101 can be specially：If modulation symbol number M is not more than the decollator number Z of code block,
The segmentation number C of code block is 1；
If modulation symbol number M is more than the decollator number Z of the code block, the segmentation number of the code block
Wherein, modulation symbol number M=K/Q, K be base station send signal transmission block bit number, bit-level code block segmentation according to
According to 6144 bits, Q is modulation bit number, the corresponding modulation system in Q=2,4,6,8 is QPSK, 16QAM, 64QAM,
256QAM, the decollator number Z=6144/Q of code block.
102nd, identical demodulation scramble process is carried out to each code symbol in the block after the segmentation；
Identical demodulation scramble process is carried out to each code symbol in the block after the segmentation, the demodulation process
Modulation system is one kind in QPSK, 16QAM, 64QAM and 256QAM, specifically which kind of modulation system to be demodulated processing needs with
With reference to the modulation system in uplink during signal modulation.
Scramble process is carried out to the output sequence after each code symbol demodulation processing in the block, the length of scrambler is equal to
The corresponding bit number of the code block, according to position of the code block in code block group and length, determines rising for the corresponding scrambler of the code block
Beginning position and end position.
103rd, bit-level processing is carried out to the bit sequence after each code block scramble process, forms the transmission block of reception
Sequence.
For example, the bit-level processing of above-mentioned steps 103 may particularly include following sub-steps：
1031st, solution rate-matched, HARQ soft mergings, channel are carried out to the bit sequence after each code block scramble process
Decoding and CRC error detections processing；
1032nd, after the completion of to each code block CRC error detections processing, the code block cascade processing of bit-level is carried out, has been formed
Whole transmission block sequence；
For example, above-mentioned steps 1032 further include：If after the completion of each code block CRC error detections processing, minute book
The code block CRC error detection situations of secondary all code blocks, form the mark sequence that a length is code block number C, wherein " 0 " represents the code
Block inerrancy, it is wrong that " 1 " represents the code block.
Optionally, after the completion of this decoding, when receiving re-transmission data next time, before demodulation starts, according to the mark
Know sequence,
If some code block is identified as " 0 ", processed correct data was received using last time, without any processing；
If some code block is identified as " 1 ", demodulation, descrambling and follow-up bit-level are re-started to the erroneous block
Processing.
1033rd, CRC error detection processing is carried out to the complete transmission block sequence；
1034th, after the completion of carrying out CRC error detection processing to the complete transmission block sequence, the transmission block number of reception is formed
Row.
Thus, the above method adds the time that block whole system is handled, and simplifies and reduce the treating capacity of system, to system
Real-time processing played great role.
Fig. 3 is the downlink reception FB(flow block) for showing PDSCH channels, as shown in figure 3, the above method can also refine point
For following steps：
201st, symbol is received；
Terminal receives the signal from base station by PDSCH channels, carries out the signal processings such as channel estimation, detection, is formed
The signal of demodulator, i.e. demodulation symbol.
202nd, the decoding block cascade of symbol level；
Code block group of the symbol segmentation for the several symbol subsequences of code block, each subsequence pair will be received according to code block number
A code block is answered, is started according to symbol initial position, the order of code block is from small to large.
For example, above-mentioned steps 202 can be specially：
2021st, the code block segmentation number of symbol level is calculated
If modulation symbol number M is not more than the decollator number Z of code block, the segmentation number C of code block is 1；
If modulation symbol number M is more than the decollator number Z of the code block, the segmentation number of the code block
Wherein, modulation symbol number M=K/Q, K be base station send signal transmission block bit number, bit-level code block segmentation according to
According to 6144 bits, Q is modulation bit number corresponding with QPSK, 16QAM, 64QAM, 256QAM respectively, Q=2,4,6 or 8, code
The decollator number Z=6144/Q of block.
2022nd, according to the size of symbol level code block number C, divide equally the modulation symbol sequence that length is M, produce C symbol
Level code block, code block group are arranged according to order (1,2 ... C) from small to large.
203rd, code block level demodulation process；
The modulation system of demodulation process is one kind in QPSK, 16QAM, 64QAM and 256QAM, specifically with which kind of modulation methods
Formula, which is demodulated processing, to be needed with reference to the modulation system in uplink during signal modulation.
204th, code block level scramble process；
Need scrambler sequence being divided into C scrambler subsequence herein, each code symbol demodulation in the block is handled
Output subsequence afterwards carries out scramble process, and the length of scrambler is equal to the corresponding bit number of the code block, according to the code block in code block
Position and length in group, determine initial position and the end position of the corresponding scrambler of the code block.
205th, the bit-level processing of code block level；
Code block after each descrambling is carried out at solution rate-matched, HARQ soft mergings, channel decoding and code block CRC error detections
Reason.
206th, code block cascade is handled；
All code blocks carry out the code block cascade processing of bit-level, have been formed after the completion of solution is transferred to code block CRC error detections processing
Whole transmission block sequence.
For example, above-mentioned steps 206 further include step：
2061st, code block CRC error detections retransmission process；
If after the completion of each code block CRC error detections processing, the code block CRC error detection situations of this all code block are recorded,
The mark sequence that a length is code block number C is formed, wherein " 0 " represents the code block inerrancy, it is wrong that " 1 " represents the code block
By mistake.
After the completion of this decoding, receive next time when retransmitting data, before demodulation starts, according to the mark sequence,
If some code block is identified as " 0 ", processed correct data was received using last time, without any processing；
If some code block is identified as " 1 ", demodulation, descrambling and follow-up bit-level are re-started to the erroneous block
Processing.
207th, transmission block CRC error detections are handled；
After code block cascade processing to the bit-level, then CRC error detection processing is carried out to whole transmission code block, passed to whole
After the completion of defeated code block carries out CRC error detection processing, the transmission block sequence of reception is formed.
The above method is using the demodulation scramble process based on code block level and the solution rate-matched of bit-level, channel decoding etc.
Processing based on code block combines, so as to simplify and reduce the treating capacity of system, this method is applied also under hardware environment
Parallel processing designs.
Fig. 4 A and Fig. 4 B show a kind of receiving and processing device schematic diagram of code block, and device of the present invention is based on eventually
What side was protected, be the device corresponding to the above method of the present invention, as shown in the figure, the device includes：Code block segmentation list
Member 301, demodulation Descrambling unit 302, code block bit-level processing unit 303；
The code block segmentation unit 301, for receiving the signal of base station transmission, carries out the signal code block of symbol level
Segmentation；
The demodulation Descrambling unit 302, for carrying out identical demodulation to each code symbol in the block after the segmentation
And scramble process；
Identical demodulation scramble process is carried out to each code symbol in the block after the segmentation, the demodulation process
Modulation system is one kind in QPSK, 16QAM, 64QAM and 256QAM, specifically which kind of modulation system to be demodulated processing needs with
With reference to the modulation system in uplink during signal modulation.
Scramble process is carried out to the output sequence after each code symbol demodulation processing in the block, the length of scrambler is equal to
The corresponding bit number of the code block, according to position of the code block in code block group and length, determines rising for the corresponding scrambler of the code block
Beginning position and end position.
The code block bit-level processing unit 303, for being carried out to the bit sequence after each code block scramble process
Bit-level processing, forms complete transmission block sequence.
Optionally, the code block bit-level processing unit includes：Code block processing unit 3031, code block concatenation unit 3032,
Transmission block error detection processing unit 3033 and transmission block sequence receiving unit 3034；
The code block processing unit 3031, for carrying out solution speed to the bit sequence after each code block scramble process
Matching, HARQ soft mergings, channel decoding and CRC error detections processing；
The code block concatenation unit 3032, after the completion of each code block CRC error detections processing, carries out the code block of bit-level
Cascade is handled；
The transmission block error detection processing unit 3033, for carrying out CRC error detection processing to the complete transmission block sequence；
Transmission block sequence receiving unit 3034, is completed for carrying out CRC error detections processing to the complete transmission block sequence
Afterwards, the transmission block sequence of reception is formed.Optionally, the code block bit-level processing unit further includes code block retransmission unit 3035；
The code block retransmission unit 3035, for after the completion of each code block CRC error detections processing, it is all to record this
The code block CRC error detection situations of code block, form the mark sequence that length is code block number C, wherein " 0 " to represent the code block error-free
By mistake, it is wrong that " 1 " represents the code block.
After the completion of this decoding, receive next time when retransmitting data, before demodulation starts, according to the mark sequence,
If some code block is identified as " 0 ", processed correct data was received using last time, without any processing；
If some code block is identified as " 1 ", demodulation, descrambling and follow-up bit-level are re-started to the erroneous block
Processing.
Each embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to foregoing
The present invention is described in detail in each embodiment, it will be understood by those of ordinary skill in the art that：It still can be to preceding
State the technical solution described in each embodiment to modify, either which part or all technical characteristic are equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the model of various embodiments of the present invention technical solution
Enclose.
Claims (8)
1. a kind of receiving handling method of code block, it is characterised in that this method includes：
Terminal receives the signal that base station is sent, and the code block segmentation of symbol level is carried out to the signal；
Each code symbol in the block after segmentation described in the terminal-pair carries out identical demodulation scramble process；
Bit sequence after each code block scramble process described in the terminal-pair carries out bit-level processing, forms the transmission block of reception
Sequence；
Wherein, the code block segmentation that symbol level is carried out to the signal, including：The signal is carried out according to modulation symbol number
Code block segmentation；
The bit-level processing includes：
Solution rate-matched, HARQ soft mergings, channel decoding and CRC are carried out to the bit sequence after each code block scramble process
Error detection is handled；
After the completion of each code block CRC error detections processing, the code block cascade processing of bit-level is carried out, forms complete transmission block
Sequence；
CRC error detection processing is carried out to the complete transmission block sequence；
After the completion of carrying out CRC error detection processing to the complete transmission block sequence, the transmission block sequence of reception is formed.
2. the method as described in claim 1, it is characterised in that the code block segmentation of symbol level is carried out to the signal, including：
If modulation symbol number M is not more than the decollator number Z of code block, the segmentation number C of code block is 1；
If modulation symbol number M is more than the decollator number Z of the code block, the segmentation number of the code block
Wherein, modulation symbol number M=K/Q, K be base station send signal transmission block bit number, Q for respectively with QPSK, 16QAM,
The corresponding modulation bit number of 64QAM, 256QAM, Q=2,4,6 or 8, the decollator number Z=6144/Q of code block.
3. the method as described in claim 1, it is characterised in that carried out to each code symbol in the block after the segmentation identical
Demodulation, be specially：
Using a kind of demodulation mode in QPSK, 16QAM, 64QAM and 256QAM in the block to each code after the segmentation
Symbol is demodulated.
4. the method as described in claim 1, it is characterised in that carried out to each code symbol in the block after the segmentation identical
Demodulation scramble process, including：
Scramble process is carried out to the output sequence after each code symbol demodulation processing in the block, obtains bit sequence；
Wherein, the length of bit sequence is equal to the corresponding bit number of code block of demodulated processing.
5. the method as described in claim 1, it is characterised in that after the completion of each code block CRC error detections processing, compared
After superfine code block cascade processing, formed before the transmission block sequence of reception, the method further includes：
If after the completion of each code block CRC error detections processing, the code block CRC error detection situations of all code blocks are recorded, form one
A length is the first flag sequence of code block number C, wherein " 0 " represents the code block inerrancy, it is wrong that " 1 " represents the code block.
6. method as claimed in claim 5, it is characterised in that the method further includes：
When there is the code block for being identified as 1 in the mark sequence, the terminal receives the signal that base station retransmits, to retransmitting
The signal formed receive transmission block sequence before,
The second identifier sequence that a length is code block number C is formed, if some code block is identified as in second identifier sequence
" 0 ", then receive processed correct data, without any processing using before the signal retransmitted is received；
If some code block is identified as " 1 ", which is re-started at demodulation, descrambling and follow-up bit-level
Reason.
7. a kind of receiving and processing device of code block, it is characterised in that the device includes：Code block segmentation unit, demodulation Descrambling unit,
Code block bit-level processing unit；
The code block segmentation unit, for receiving the signal of base station transmission, carries out the signal code block segmentation of symbol level；
The demodulation Descrambling unit, for being carried out to each code symbol in the block after the segmentation at identical demodulation descrambling
Reason；
The code block bit-level processing unit, for being carried out to the bit sequence after each code block scramble process at bit-level
Reason, forms the transmission block sequence of reception；
Wherein, the code block segmentation that symbol level is carried out to the signal, including：The signal is carried out according to modulation symbol number
Code block segmentation；
The code block bit-level processing unit includes：Code block processing unit, code block concatenation unit, transmission block error detection processing unit and
Transmission block sequence receiving unit；
The code block processing unit, for the bit sequence after each code block scramble process is carried out solution rate-matched,
HARQ soft mergings, channel decoding and CRC error detections processing；
The code block concatenation unit, after the completion of each code block CRC error detections processing, carries out at the code block cascade of bit-level
Reason, forms complete transmission block sequence；
The transmission block error detection processing unit, for carrying out CRC error detection processing to the complete transmission block sequence；
Transmission block sequence receiving unit, after the completion of carrying out CRC error detection processing to the complete transmission block sequence, formation connects
The transmission block sequence of receipts.
8. device as claimed in claim 7, it is characterised in that the code block bit-level processing unit further includes code block and retransmits list
Member；
The code block retransmission unit, for after the completion of each code block CRC error detections processing, recording the code of this all code block
Block CRC error detection situations, form the mark sequence that a length is code block number C, wherein " 0 " represents the code block inerrancy, " 1 " generation
The table code block is wrong.
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| CN107566100B (en) * | 2016-06-30 | 2020-02-21 | 华为技术有限公司 | Information sending and receiving method and equipment |
| EP3832922A1 (en) * | 2016-07-15 | 2021-06-09 | Sharp Kabushiki Kaisha | Transmission apparatus, reception apparatus, transmission method, and reception method |
| EP3584977B1 (en) * | 2017-02-22 | 2022-01-26 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for information transmission |
| CN108809481B (en) | 2017-04-28 | 2022-08-26 | 华为技术有限公司 | Data processing method and data processing device |
| CN108988984B (en) * | 2017-05-31 | 2021-07-09 | 株式会社Kt | Method for retransmitting transport blocks for new radio and apparatus using the same |
| CN112770355B (en) * | 2020-12-31 | 2022-10-25 | 展讯通信（上海）有限公司 | Information receiving method and device, and computer readable storage medium |
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| CN101335732A (en) * | 2007-06-29 | 2008-12-31 | 华为技术有限公司 | Symbol interleaving mode selection method, apparatus and transmitter implementing symbol interleaving |
| CN101202606A (en) * | 2007-11-28 | 2008-06-18 | 华为技术有限公司 | Method and apparatus for information transmitting of high speed upward packet access system |
| CN102055558A (en) * | 2011-01-04 | 2011-05-11 | 上海华为技术有限公司 | Method and device for segment decoding of transport block (TB) as well as multiple input multiple output (MIMO) receiver |
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