CN105007140B - HARQ processing method and processing devices based on CRC check - Google Patents
HARQ processing method and processing devices based on CRC check Download PDFInfo
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- CN105007140B CN105007140B CN201510507572.3A CN201510507572A CN105007140B CN 105007140 B CN105007140 B CN 105007140B CN 201510507572 A CN201510507572 A CN 201510507572A CN 105007140 B CN105007140 B CN 105007140B
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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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]
Abstract
HARQ processing method and processing devices provided by the invention based on CRC check, including：Judge whether packet is new data packets, wherein, the new data packets include M code block, and M is positive integer；If the packet is the new data packets, traveled through to obtain at least one first data and at least one first solution bit selection data from first code block in the M code block；If the packet is not the new data packets, traveled through to obtain at least one second data and at least one second solution bit selection data from first CRC CRC check erroneous block in the M code block；At least one first data or at least one second data are subjected to code block cascade respectively, and carry out CRC check.The present invention can efficiently reduce bit-level processing of the HARQ when retransmitting.
Description
Technical field
The present invention relates to mobile communication technology, more particularly to a kind of HARQ processing method and processing devices based on CRC check.
Background technology
In a wireless communication system, CRC (Cyclic Redundancy Check, CRC) is a kind of conventional
Bit error detection method, it by data carry out polynomial computation, obtained result is attached to behind frame, receiving terminal is also held
The similar algorithm of row, to ensure the correctness of data transfer and integrality.Because it has stronger detectability, and easily
It is performed, therefore is widely used.
In Long Term Evolution (Long Term Evolution, LTE) system, in order to improve the performance of system and throughput,
Data transfer uses HARQ transmission mechanism.Its detailed process is：Transmitting terminal carries out Error Correction of Coding processing to data, and receiving terminal presses one
Determine algorithm and carry out error-correcting decoding, successfully decoded feedback acknowledgment information, otherwise feeding back unsuccessful information.Transmitting terminal enters according to feedback information
The new packet transmission (i.e. confirmation) of row, or retransmit miss data bag (i.e. failure information).
In LTE system, receiving terminal bit-level handling process schematic diagram is specifically as shown in Figure 1.When transport block size exceedes
It is transmitted during 6144 bit, it is necessary to be classified as multiple code blocks, each code block individually carries out bit-level processing.Receiving terminal includes
Solve the processes such as rate-matched, HARQ merging, decoding.Conventional method in receiving terminal to first carrying out code block CRC check process, and
CRC check is carried out to whole transmission block after code block cascade.When transmission block CRC check by when, return ACK send new data packets；
Otherwise NACK is returned, if number of retransmissions is equal to 3, sends new data packets, otherwise retransmits packet.
The bit-level processing procedure that correct code block still provides for complexity was transmitted to last time when HARQ retransmits.In LTE system
In, maximum transmitted code block number is 13.If the code block CRC check when transmitting first of preceding 12 code blocks is correct, last 1 code block is three
CRC check is correct after secondary re-transmission, then when subsequently retransmitting three times, preceding 12 code blocks still repeat solution rate-matched, HARQ merges, translated
The complex processes such as code, CRC check, decoding result is not influenceed, but add operand, cause the waste of calculation resources.
In addition, when retransmitting packet, the solution bit that the packet transmits several times before HARQ merging need to retain selects
As a result, used when this transmission HARQ merges.Solve bit selection result and include system information position, check bit 1, check bit 2 three
Circuit-switched data information, three times of transmission data volume about before coding.Therefore it is higher in the memory space resource requirement to cache information.
The content of the invention
HARQ processing method and processing devices provided by the invention based on CRC check, can efficiently reduce HARQ and retransmit
When bit-level processing.
According to an aspect of the present invention, there is provided a kind of HARQ processing methods based on CRC check, including：
Judge whether packet is new data packets, wherein, the new data packets include M code block, and M is positive integer；If
The packet is the new data packets, then is traveled through to obtain at least one from first code block in the M code block
One data and at least one first solution bit selection data；If the packet is not the new data packets, from the M
First CRC CRC check erroneous block in code block is traveled through to obtain at least one second data and at least
One second solution bit selection data；At least one first data or at least one second data are subjected to code respectively
Block cascades, and carries out CRC check.
According to an aspect of the present invention, there is provided a kind of HARQ processing units based on CRC check, including：
Judging unit, for judging whether packet is new data packets, wherein, the new data packets include M code block, M
For positive integer；First Traversal Unit, in the case of being the new data packets in the packet, from the M code block
First code block traveled through to obtain at least one first data and at least one first solution bit selection data；Second traversal
Unit, in the case of being not the new data packets in the packet, from first cyclic redundancy in the M code block
Check code CRC check erroneous block is traveled through to obtain at least one second data and at least one second solution bit selection number
According to；Code block concatenation unit, at least one first data or at least one second data to be carried out into code block respectively
Cascade, and carry out CRC check.
HARQ processing method and processing devices provided in an embodiment of the present invention based on CRC check, by whether judging packet
For new data packets, if packet is new data packets, traveled through to obtain from first code block in M code block at least one
First data and at least one first solution bit selection data, if packet is not new data packets, from the in M code block
One CRC CRC check erroneous block is traveled through to obtain at least one second data and at least one second solution
Bit selects data, and at least one first data or at least one second data are carried out into code block cascade, and carries out CRC check,
So as to efficiently reduce bit-level processing of the HARQ when retransmitting.
Brief description of the drawings
Fig. 1 is bit-level handling process schematic diagram；
Fig. 2 is the HARQ process flow figures provided in an embodiment of the present invention based on CRC check；
Fig. 3 is another HARQ process flow figures based on CRC check provided in an embodiment of the present invention；
Fig. 4 is the HARQ processing unit schematic diagrames provided in an embodiment of the present invention based on CRC check.
Embodiment
The HARQ processing method and processing devices provided in an embodiment of the present invention based on CRC check are carried out below in conjunction with the accompanying drawings detailed
Thin description.
Fig. 2 is the HARQ process flow figures provided in an embodiment of the present invention based on CRC check.
Reference picture 2, in step S101, judge whether packet is new data packets, wherein, the new data packets include M
Code block, M are positive integer.
In step S102, if the packet is the new data packets, from first code block in the M code block
Traveled through to obtain at least one first data and at least one first solution bit selection data.
In step S103, if the packet is not the new data packets, followed from first in the M code block
Ring redundancy check code CRC check erroneous block is traveled through to obtain at least one second data and at least one second solution than special
Select data.
In step S104, at least one first data or at least one second data are subjected to code block level respectively
Connection, and carry out CRC check.
Further, if the packet is the new data packets, from first code in the M code block
Block is traveled through to obtain at least one first data and at least one first solution bit selects data to include, and repeats following place
Reason, until m-th code block is traversed：
Bit-level is carried out to first code block to handle to obtain first data；
First data are subjected to CRC check；
If first data store first data and carry out next code block by the CRC check
Bit-level processing；
If first data solve bit selection not over the CRC check, in stored bits level processing procedure
As a result, the first solution bit selection data are obtained, and remaining is not subjected to bit-level processing code block and all carries out solving at bit selection
Reason.
Here, when packet is new data packets, carry out solving rate-matched and decoding processing from first code block, and carry out
CRC check, if by CRC check, the first data are stored, and enter the processing of second code block, second code
Block continues to solve rate-matched and decoding processing, and carries out CRC check, to the last a code block (i.e. m-th code block), most
Posterior circle terminates.
If first code block carries out solution bit selection and handles to obtain the selection of the first solution bit not over CRC check
Data, and stored, since second code block, remaining code block all carries out the selection of solution bit and handled, to the last one
Code block (i.e. m-th code block), finally circulation terminate.
Further, if the packet is not the new data packets, first from the M code block
CRC CRC check erroneous block is traveled through to obtain at least one second solution of at least one second data than special
Selecting data includes, and repeats following processing, until the m-th code block is traversed：
First CRC check erroneous block progress bit-level is handled to obtain second data；
CRC check is carried out to second data；
If second data store second data and carry out next code block by the CRC check
Bit-level processing；
If second data are not over the CRC check, to first CRC check erroneous block bit
Obtained solution bit selection result is stored in level processing procedure, obtains the second solution bit selection data, and by remaining
The code block of only storage solution bit selection data carries out solving bit selection processing.
Here, when packet is not new data packets, from first CRC check erroneous block carry out solution rate-matched,
HARQ merges and the processing of decoding, and carries out CRC check, if by CRC check, the second data are stored, gone forward side by side
Enter the processing of second code block, second code block continues the processing for solving rate-matched, HARQ merges and decoded, and carries out
CRC check, to the last a code block (i.e. m-th code block), finally circulation terminate.
If first CRC check erroneous block carries out solution bit selection and handles to obtain second not over CRC check
Bit selection data are solved, and are stored, since second code block, remaining code block all carries out solving bit selection processing, directly
To a last code block (i.e. m-th code block), finally circulation terminates.
Further, it is described to carry out bit-level to first code block and handle to obtain first data to include：
Solution rate-matched is carried out to first code block and obtains the 3rd data；
3rd data are entered into row decoding and obtain first data.
Further, it is described to handle first CRC check erroneous block progress bit-level to obtain second number
According to including：
Solution rate-matched is carried out to first CRC check erroneous block and obtains the 4th data；
4th data progress HARQ is merged to obtain the 5th data；
5th data are entered into row decoding and obtain the second data.
Fig. 3 is another HARQ process flow figures based on CRC check provided in an embodiment of the present invention.
Reference picture 3, step 1, judge whether packet is new data packets.If new data packets, opened from first code block
Beginning is handled, and into code block cyclic, performs step 2；If new data packets it are not, from first CRC check erroneous block
Handled, into code block cyclic, perform step 3.
Step 2, bit-level processing is carried out to first code block, bit-level processing includes solving rate-matched and decoding, then
CRC check is carried out, if CRC check result is correct, the first data is stored in and cached, perform step 4；If CRC check knot
Fruit is incorrect, by the first solution bit selection data deposit caching, performs step 6.
Step 3, carry out bit-level processing to first CRC check erroneous block, bit-level processing include solution rate-matched,
HARQ merges and decoding, then enters CRC check, if CRC check result is correct, the second data is stored in and cached, perform step
5；If CRC check result is incorrect, by the second solution bit selection data deposit caching, step 6 is performed.
Step 4, judge whether code block sequence number is more than M, that is, judge whether code block is last code block.If code block sequence number
More than M, terminate code block cyclic, perform step 8；If code block sequence number is less than M, next code block is handled, performs step
2。
Step 5, judge whether code block sequence number is more than M, if code block sequence number is more than M, terminate code block cyclic, perform step 8；
If code block sequence number is less than M, next code block is handled, performs step 3.
Step 6, judge whether code block sequence number is more than M, if code block sequence number is more than M, terminate code block cyclic, return to NACK.
If code block sequence number is less than M, next code block is handled, performs step 7.
Step 7, code-aiming block carries out solving bit selection processing, no longer carries out remaining processing procedure, then records code block CRC
As a result it is mistake, and the selection result deposit of solution bit is cached, repeats step 6.
Step 8, at least one first data or at least one second data are subjected to code block cascade, Ran Houjin
Row transmission block CRC check.If verification passes through, ACK is returned；If verification is not over returning to NACK.
Fig. 4 is the HARQ processing unit schematic diagrames provided in an embodiment of the present invention based on CRC check.
Reference picture 4, the device include judging unit 30, the first Traversal Unit 31, the second Traversal Unit 32 and code block cascade
Unit 33.
Judging unit 30 is used to judge whether packet is new data packets, wherein, the new data packets include M code block, M
For positive integer.
First Traversal Unit 31 is used in the case where the packet is the new data packets, from the M code block
First code block traveled through to obtain at least one first data and at least one first solution bit selection data.
Second Traversal Unit 32 is used in the case where the packet is not the new data packets, from the M code block
In first CRC CRC check erroneous block traveled through to obtain at least one second data and at least one
Second solution bit selection data.
Code block concatenation unit 33 is used to respectively enter at least one first data or at least one second data
Row code block cascades, and carries out CRC check.
Further, first Traversal Unit 31 is used to repeat following processing, until m-th code block is traversed：
Bit-level is carried out to first code block to handle to obtain first data；
First data are subjected to CRC check；
If first data store first data and carry out next code block by the CRC check
Bit-level processing；
If first data solve bit selection not over the CRC check, in stored bits level processing procedure
As a result, the first solution bit selection data are obtained, and remaining is not subjected to bit-level processing code block and all carries out solving at bit selection
Reason.
Further, second Traversal Unit 32 is used to repeat following processing, until m-th code block quilt time
Go through：
First CRC check erroneous block progress bit-level is handled to obtain second data；
CRC check is carried out to second data；
If second data store second data and carry out next code block by the CRC check
Bit-level processing；
If second data are not over the CRC check, to first CRC check erroneous block bit
Obtained solution bit selection result is stored in level processing procedure, obtains the second solution bit selection data, and by remaining
The code block of only storage solution bit selection data carries out solving bit selection processing.
Further, first Traversal Unit 31 also includes：
Solution rate-matched is carried out to first code block and obtains the 3rd data；
3rd data are entered into row decoding and obtain first data.
Further, second Traversal Unit 32 also includes：
Solution rate-matched is carried out to first CRC check erroneous block and obtains the 4th data；
4th data progress HARQ is merged to obtain the 5th data；
5th data are entered into row decoding and obtain the second data.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of HARQ processing methods based on CRC check, it is characterised in that methods described includes：
Judge whether packet is new data packets, wherein, the packet includes M code block, and M is positive integer；
If the packet is the new data packets, from first code block in the M code block traveled through to obtain to
Few first data and at least one first solution bit selection data；
If the packet is not the new data packets, from first CRC CRC in the M code block
Check errors code block is traveled through to obtain at least one second data and at least one second solution bit selection data；
At least one first data or at least one second data are subjected to code block cascade respectively, and carry out CRC schools
Test.
2. according to the method for claim 1, it is characterised in that if the packet is the new data packets,
Traveled through to obtain at least one first data and at least one first solution than special from first code block in the M code block
Selecting data includes, and repeats following processing, until m-th code block is traversed：
Bit-level is carried out to first code block to handle to obtain first data；
First data are subjected to CRC check；
If first data store first data and carry out the bit of next code block by the CRC check
Level processing；
If first data not over the CRC check, solve bit selection result in stored bits level processing procedure,
The first solution bit selection data are obtained, and remaining is not subjected to bit-level processing code block and all carries out solving bit selection processing.
3. according to the method for claim 1, it is characterised in that if the packet is not the new data packets,
Then traveled through to obtain at least one from first CRC CRC check erroneous block in the M code block
At least one second solution bit selection data of two data include, and following processing are repeated, until m-th code block is traversed：
First CRC check erroneous block progress bit-level is handled to obtain second data；
CRC check is carried out to second data；
If second data store second data and carry out the bit of next code block by the CRC check
Level processing；
If second data are not over the CRC check, at first CRC check erroneous block bit-level
The solution bit selection result obtained during reason is stored, and obtains the second solution bit selection data, and remaining is only deposited
The code block of storage solution bit selection data carries out solving bit selection processing.
4. according to the method for claim 2, it is characterised in that described that first code block progress bit-level is handled
Include to first data：
Solution rate-matched is carried out to first code block and obtains the 3rd data；
3rd data are entered into row decoding and obtain first data.
5. according to the method for claim 3, it is characterised in that described to carry out first CRC check erroneous block
Bit-level, which handles to obtain second data, to be included：
Solution rate-matched is carried out to first CRC check erroneous block and obtains the 4th data；
4th data progress HARQ is merged to obtain the 5th data；
5th data are entered into row decoding and obtain the second data.
6. a kind of HARQ processing units based on CRC check, it is characterised in that described device includes：
Judging unit, for judging whether packet is new data packets, wherein, the packet includes M code block, and M is just whole
Number；
First Traversal Unit, in the case of being the new data packets in the packet, first from the M code block
Individual code block is traveled through to obtain at least one first data and at least one first solution bit selection data；
Second Traversal Unit, in the case of being not the new data packets in the packet, from the in the M code block
One CRC CRC check erroneous block is traveled through to obtain at least one second data and at least one second solution
Bit selects data；
Code block concatenation unit, at least one first data or at least one second data to be carried out into code block respectively
Cascade, and carry out CRC check.
7. device according to claim 6, it is characterised in that first Traversal Unit is used to repeat following place
Reason, until m-th code block is traversed：
Bit-level is carried out to first code block to handle to obtain first data；
First data are subjected to CRC check；
If first data store first data and carry out the bit of next code block by the CRC check
Level processing；
If first data not over the CRC check, solve bit selection result in stored bits level processing procedure,
The first solution bit selection data are obtained, and remaining is not subjected to bit-level processing code block and all carries out solving bit selection processing.
8. device according to claim 6, it is characterised in that second Traversal Unit is used to repeat following place
Reason, until m-th code block is traversed：
First CRC check erroneous block progress bit-level is handled to obtain second data；
CRC check is carried out to second data；
If second data store second data and carry out the bit of next code block by the CRC check
Level processing；
If second data are not over the CRC check, at first CRC check erroneous block bit-level
The solution bit selection result obtained during reason is stored, and obtains the second solution bit selection data, and remaining is only deposited
The code block of storage solution bit selection data carries out solving bit selection processing.
9. device according to claim 7, it is characterised in that first Traversal Unit also includes：
Solution rate-matched is carried out to first code block and obtains the 3rd data；
3rd data are entered into row decoding and obtain first data.
10. device according to claim 8, it is characterised in that second Traversal Unit also includes：
Solution rate-matched is carried out to first CRC check erroneous block and obtains the 4th data；
4th data progress HARQ is merged to obtain the 5th data；
5th data are entered into row decoding and obtain the second data.
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| CN110430010B (en) * | 2017-01-05 | 2020-08-07 | 华为技术有限公司 | Information processing method and device |
| CN109064524A (en) * | 2018-08-16 | 2018-12-21 | 上海联影医疗科技有限公司 | A kind of data transmission method, rebuilds machine and medium at data collection plate |
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| CN101237241A (en) * | 2007-01-31 | 2008-08-06 | 大唐移动通信设备有限公司 | A method and system for realizing mixed automatic request re-transfer processing and channel decoding |
| CN101552659A (en) * | 2008-04-01 | 2009-10-07 | 普天信息技术研究院有限公司 | Selecting type data retransmitting method and equipment |
| CN101983489A (en) * | 2008-03-31 | 2011-03-02 | 马维尔国际贸易有限公司 | Method and apparatus for selective combining and decoding of the multiple code blocks of a transport block |
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| KR20060011249A (en) * | 2004-07-29 | 2006-02-03 | 삼성전자주식회사 | Method and apparatus for managing a deinterleaving buffer in a mobile communication system adapted block interleaving |
| AU2005239657B2 (en) * | 2004-12-01 | 2007-12-13 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving data with high reliability in a mobile communication system supporting packet data transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101237241A (en) * | 2007-01-31 | 2008-08-06 | 大唐移动通信设备有限公司 | A method and system for realizing mixed automatic request re-transfer processing and channel decoding |
| CN101983489A (en) * | 2008-03-31 | 2011-03-02 | 马维尔国际贸易有限公司 | Method and apparatus for selective combining and decoding of the multiple code blocks of a transport block |
| CN101552659A (en) * | 2008-04-01 | 2009-10-07 | 普天信息技术研究院有限公司 | Selecting type data retransmitting method and equipment |
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