CN110071780A - Method of calibration and device, communication equipment applied to low-density parity-check inspection LDPC - Google Patents
Method of calibration and device, communication equipment applied to low-density parity-check inspection LDPC Download PDFInfo
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- CN110071780A CN110071780A CN201810065301.0A CN201810065301A CN110071780A CN 110071780 A CN110071780 A CN 110071780A CN 201810065301 A CN201810065301 A CN 201810065301A CN 110071780 A CN110071780 A CN 110071780A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
- H03M13/09—Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
- H03M13/255—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] with Low Density Parity Check [LDPC] codes
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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
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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Abstract
The embodiment of the present application provides a kind of method of calibration and relevant device applied to LDPC, the data received are verified for receiving device, the complexity that receiving device verifies the data received is reduced, and then reduces the power consumption of receiving device verification data.Wherein, this method comprises: carrying out solution rate-matched to received data to obtain coding codeword to be decoded；The coding codeword is decoded to obtain decoding result；Determine that verification mode, the verification mode are that the joint survey being made of the verification of LDPC check matrix and cyclic redundancy check verification or LDPC check matrix verify according to transport block size TBS；The decoding result is verified according to the verification mode of the determination.
Description
Technical field
This application involves the communications field, in particular to a kind of low-density parity-check that is applied to examines (low density
Parity check, LDPC) method of calibration and device, communication equipment.
Background technique
With the development of communication technology, it requires to carry out data transmission in each communication system, for example, base station and core net net
It between member, between inside of base station module, between base station and terminal device etc., requires to carry out data transmission, is carrying out data biography
When defeated, it is involved in coding and the decoding of data.
In existing scheme, sending device carries out additional cyclic redundancy detection to transmission block (transport block, TB)
(cyclic redundancy check, CRC), the as TB increase the check bit of presetting length；Subsequent sending device is to additional
TB after CRC carries out cutting, can also only cutting can be 1 CB with cutting for multiple encoding blocks (code block, CB),
Sending device adds cyclic redundancy check to each CB again later, if only cutting is a CB to the TB after additional CRC, no longer needs to pair
One CB adds CRC；Subsequent sending device carries out forward error correction (forward error to the CB after each additional CRC
Correction, FEC) coding；Rate-matched is carried out after completing FEC coding, is sent to receiving device later.Receiving device is connecing
After the data for receiving sending device transmission, solution rate-matched is carried out, is then decoded and is verified.
For example, the data transmission procedure that the 5th generation (5th-Generation, 5G) communication system provides includes sending device
TB of the transport block size (Transport Block Size, TBS) greater than 3824 additional 24 CRC, TBS are not more than 3824
TB additional 16 CRC, be then multiple CB or CB by TB cutting.And each CB in multiple CB is added
CRC is sent to receiving device after carrying out FEC coding and rate-matched later；If it is one that the TB after additional CRC, which is only split,
A CB is then sent to receiving device after carrying out FEC coding and rate-matched without carrying out additional CRC to a CB.
If the data that receiving device receives are the CB after coding and rate-matched, receiving device is to the coding and rate-matched
CB afterwards carries out solution rate-matched, decoding, verification and TB recombination, during a decoding of iterative decoding, needs to this
The decoding result that one decoding process obtains carries out the verification of LDPC checksum CRC.Wherein, CRC check may include the school CRC_16
It tests or CRC_24 verification etc., i.e. 16 CRC checks of CRC_16 verification, the CRC check of CRC_24 verification i.e. 24.Therefore, exist
Receiving device receive sending device transmission data after, receiving device needs solution rate-matched is carried out to the data, it is laggard
Row decoding is to be decoded as a result, then verifying to decoding result, due to including LDPC checksum CRC school in checking procedure
It tests, implementation complexity is high.
Summary of the invention
The embodiment of the present application provides a kind of method of calibration and relevant device applied to LDPC, is used for receiving device pair
The data received are verified, and reduce the complexity that receiving device verifies the data received, and then reduce and receive
The power consumption of equipment verification data.
In view of this, the application first aspect provides a kind of method of calibration applied to LDPC, comprising:
Solution rate-matched is carried out to obtain coding codeword to be decoded to received data；Then the coding codeword is carried out
To be decoded as a result, determining verification mode according to TBS, which is the length of TB for decoding, which includes that coding codeword institute is right
The CB answered, the i.e. CB are one in one or more CB of the TB institute cutting, which is by LDPC check matrix school
Test the joint survey or the verification of LDPC check matrix with cyclic redundancy check verification composition；According to determining verification mode pair
The decoding result is verified, and can be determined after verification passes through successfully decoded to coding codeword.
In the embodiment of the present application, it can determine that verification mode, verification mode may include verifying square by LDPC according to TBS
The joint survey or the verification of LDPC check matrix of battle array checksum CRC verification composition, wherein may include only carrying out LDPC verification square
The case where battle array verification, can reduce the complexity verified to decoding result.
In conjunction with the application in a first aspect, this is big according to transmission block in the first embodiment of the application first aspect
Small TBS determines that verification mode includes:
The TBS and threshold value are compared, which is the length of the corresponding TB of CB, and the CB is multiple for the TB institute cutting
One in CB；When the TBS is not more than the threshold value, determine that the verification mode is by LDPC check matrix verification and the CRC
The joint survey for verifying composition can determine successfully decoded after LDPC check matrix verifies and CRC check all passes through；At this
When TBS is greater than the threshold value, determine that the verification mode for LDPC check matrix verification, passes through in LDPC check matrix verification
Afterwards, it can determine successfully decoded.
In the embodiment of the present application, when TBS is less than threshold value, LDPC check matrix checksum CRC is carried out to decoding result
Verification carries out the verification of LDPC check matrix to decoding result, relative to all carrying out in existing scheme when TBS is greater than threshold value
The verification of LDPC check matrix and CRC check, the embodiment of the present application can reduce the complexity to data check.
In conjunction with the first embodiment of the application first aspect, in second of embodiment of the application first aspect
In, which is 3824.
In conjunction with the first embodiment of the application first aspect or second of embodiment of the application first aspect,
In the third embodiment of the application first aspect, joint verification is 16 by LDPC check matrix verification and length
CRC check composition.
In conjunction with the application first aspect, the first embodiment of the application first aspect to the application first aspect
Any embodiment in three kinds of embodiments, in the 4th kind of embodiment of the application first aspect, which is
When the joint verifies, this verify to the decoding result according to determining verification mode includes:
LDPC check matrix verification and the CRC check are carried out to the decoding result timesharing.LDPC verification can be first carried out
MATRIX CHECK-UP executes CRC check afterwards, can also first carry out CRC check, rear to execute the verification of LDPC check matrix, specifically herein not
It limits.
In the embodiment of the present application, the verification of LDPC check matrix checksum CRC is carried out to decoding result timesharing, i.e., in difference
Time execute the verification of LDPC check matrix and CRC check, further reduced to the complexity that is verified of decoding result.
In conjunction with the application first aspect, the first embodiment of the application first aspect to the application first aspect
Any embodiment in four kinds of embodiments, in the 5th kind of embodiment of the application first aspect, which verifies square
Battle array verification includes being verified using the part verification formula of the LDPC check matrix.
In the application embodiment, it is possible to use only the part verification formula in LDPC check matrix is verified, for example,
The check results verified using the check results of the first row or first row in LDPC check matrix as LDPC, can be improved
The efficiency of LDPC check matrix verification can be further improved LDPC check matrix especially in the biggish situation of false-alarm probability
The efficiency of verification.
The application second aspect provides a kind of calibration equipment, may include:
Velocity module is solved, is used to analyze the received data and carries out solution rate-matched to obtain coding codeword B；
Decoding module, the coding codeword for obtaining to the solution velocity module are decoded to obtain decoding result；
Determining module, for determining verification mode according to transport block size TBS, which is by LDPC check matrix
Verification and the joint survey of cyclic redundancy check verification composition or the verification of LDPC check matrix, the TBS are the length of TB, should
TB includes CB corresponding to the coding codeword, i.e. the CB is one in one or more CB of the TB institute cutting；
Correction verification module, the decoding result that the verification mode for being determined according to the determining module decodes the decoding module into
Row verification.
In conjunction with the application second aspect, in the first embodiment of the application second aspect, the determining module is specific
For:
The TBS and threshold value are compared；
When the TBS is not more than the threshold value, determine that the verification mode is by LDPC check matrix verification and the CRC check
The joint survey of composition；
When the TBS is greater than the threshold value, determine the verification mode for LDPC check matrix verification.
In conjunction with the first embodiment of the application second aspect, in second of embodiment of the application second aspect
In, which is 3824.
In conjunction with the first embodiment of the application second aspect or second of embodiment of the application second aspect,
In the third embodiment of the application second aspect, joint verification is 16 by LDPC check matrix verification and length
CRC check composition.
In conjunction with the application second aspect, the first embodiment of the application second aspect to the application second aspect
Three kinds of embodiments, in the 4th kind of embodiment of the application second aspect, which is specifically used for:
When the verification mode is that the joint verifies, LDPC check matrix verification is carried out to the decoding result timesharing and is somebody's turn to do
CRC check.
In conjunction with the application second aspect, the first embodiment of the application second aspect to the application second aspect
Four kinds of embodiments, in the 5th kind of embodiment of the application second aspect, LDPC check matrix verification includes using to be somebody's turn to do
The part verification formula of LDPC check matrix is verified.
The embodiment of the present application third aspect provides a kind of communication equipment, may include:
Processor and memory, the processor are connect with the memory；
The memory, for storing program code；
The processor executes the application first aspect or first aspect any reality when calling the program code in the memory
The step of receiving device that the mode of applying provides executes.
The embodiment of the present application fourth aspect provides a kind of storage medium, it should be noted that the technical solution essence of this hair
On in other words all or part of the part that contributes to existing technology or the technical solution can with software produce mouth shape
Formula embodies, which is stored in a storage medium, for being stored as calculating used in above equipment
Machine software instruction, it includes be program designed by receiving device for executing above-mentioned first aspect.
The storage medium includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), arbitrary access
The various media that can store program code such as memory (Random Access Memory, RAM), magnetic or disk.
The 5th aspect of the embodiment of the present application provides a kind of computer program product comprising instruction, when it is transported on computers
When row, so that computer executes the method as described in the application first aspect or first aspect any optional embodiment.
In the embodiment of the present application, it after being decoded to obtain decoding result to coding codeword, is determined and is verified according to TBS
Mode, the verification mode may include joint survey or the verification of LDPC check matrix, and joint verification includes LDPC verification and CRC
Then verification verifies decoding result according to determining verification mode.It therefore, in the embodiment of the present application, can basis
TBS determines verification mode, and different TBS can correspond to different verification modes, including only carry out LDPC check matrix verification
Scene, can reduce to the complexity that is verified of decoding result.
Detailed description of the invention
Fig. 1 is the system framework figure in the embodiment of the present application；
Fig. 2 is the flow diagram that sending device realizes data transmission in the embodiment of the present application；
Fig. 3 is the flow diagram that receiving device realizes data transmission in the embodiment of the present application；
Fig. 4 is one embodiment signal for being applied to the method for calibration that low-density parity-check examines LDPC in the embodiment of the present application
Figure；
Fig. 5 is another implementation illustration for being applied to the method for calibration that low-density parity-check examines LDPC in the embodiment of the present application
It is intended to；
Fig. 6 is one embodiment schematic diagram of calibration equipment in the embodiment of the present application；
Fig. 7 is one embodiment schematic diagram of communication equipment in the embodiment of the present application.
Specific embodiment
The embodiment of the present application provides a kind of method of calibration and relevant device applied to LDPC, is used for receiving device pair
The data received are verified, and reduce the complexity that receiving device verifies the data received, and then reduce and receive
The power consumption of equipment verification data.
The adaptable system architecture of scheme provided by the embodiments of the present application is as shown in Figure 1, mainly by terminal device, base station
And core net forms, and can have the connection of X2 or Xn interface, and core network access between multiple base stations.Terminal device accesses base
It stands, connection is established by base station and core net, for example, 1 access base station 1 of terminal device, between base station 1, base station 2 and base station 3
The connection of X2/Xn interface is established, 2 access base station 3 of terminal device, terminal device 1 and terminal device 2 can pass through base station 1 and base station 3
Connection is established with core net, and carries out communication and data transmission.It is provided by the embodiments of the present application to be applied to low-density parity-check
The method of calibration of inspection LDPC can be adapted for transmitting data check when data between core network element, be also possible to core net net
Data check when data between the internal modules of member are transmitted, the data being also possible between base station and core network element pass
Data check when defeated is also possible to data check when data are transmitted between inside of base station modules, can also be that terminal is set
Data check when data between standby internal modules are transmitted.
Scheme provided by the embodiments of the present application can be adapted for LTE system, can be applicable to other and is verified using LDPC
MATRIX CHECK-UP carries out the communication system of data check, and for example, by using CDMA, frequency division multiple access, time division multiple acess, orthogonal frequency is more
Location, the system of the access technologies such as single-carrier frequency division multiple access and new wireless access network (new radio, the NR) system of the 5th generation 5G
System etc..
Method of calibration provided by the embodiments of the present application applied to low-density parity-check inspection LDPC is suitable for receiving device pair
The data received are verified, and the data that receiving device receives are sent by sending device, below to sending device and reception
The process of device data processing is illustrated.It should be noted that the sending device and receiving device in the embodiment of the present application can
To be the internal components or module of base station, terminal device, core network element or these equipment, the sending device and receiving device are also
It can be same base station, the distinct device in same terminal device or same core network element etc., with specific reference to actual design field
Scape adjustment, this is not limited here.
Referring to Fig. 2, sending device realizes the flow diagram of data transmission in the embodiment of the present application.
Firstly, TB is carried out additional CRC by sending device, i.e., the check code of an additional presetting length, which can be with
It is calculated by sending device by the generator polynomial of TB and agreement, which can be attached to the end of TB, use
TB is verified in receipt of subsequent equipment, so that receiving device obtains accurate data.For example, accessing net (New in 5G
Radio, NR) in system, when the length of TB is greater than 3824, arrange 24 generator polynomials, check code can be by not
It carries out 24 generator polynomials of additional TB and this to be calculated, the length of the check code is also 24, which is attached to
The end of TB, the generator polynomial that the TB after additional check code can be arranged divide exactly；When the length of TB is not more than 3824,
The generator polynomial of agreement one 16, check code can be calculated by not carrying out additional TB and 24 generator polynomials
It arrives, the length of the check code can be 16, which is attached to the end of TB, can be arranged after additional check code
Generator polynomial divides exactly.It is specific for example, 24 generator polynomials of agreement and 16 generator polynomials of agreement respectively can be with
It is:
GCRC_24(D)=D24+D23+D18+D17+D14+D11+D10+D7+D6+D5+D4+D3+ D+1,
GCRC_16(D)=D16+D12+D5+1。
Sending device judges whether the length of the TB of additional CRC check position is greater than threshold value later, i.e. whether TBS is greater than threshold
Value, if the length of the TB of additional cyclic redundancy check is greater than threshold value, which is multiple CB, specific cutting by sending device
The method of CB can be 1 TB and be averaged cutting as multiple CB, is also possible to sending device according to preset rule and is by TB cutting
The CB of preset quantity, this is not limited here.Sending device adds the school CRC after being multiple CB by TB cutting, for each CB
Code is tested, for the subsequent CRC check to CB data, the mode and TB of adding cyclic redundancy check add the mode class of cyclic redundancy check
Seemingly, the length of the cyclic redundancy check can be 4, be also possible to 16, can also be 24, this is not limited here.Example
Such as, in 5G NR system, the length that CRC is added for each CB is 24, and the generator polynomial arranged can be with are as follows: G (D)=
D24+D23+D6+D5+D+1.Sending device is after each CB adds cyclic redundancy check, to CB after additional cyclic redundancy check in sending device
FEC coding is carried out, it includes preset verification mode in LDPC coding, or include pre- that FEC coding, which includes that LDPC is encoded,
LDPC check matrix check code set etc. can be used for receiving device and carry out the verification of LDPC check matrix to the data received.So
Sending device carries out FEC coding to CB afterwards, adds error correcting code for CB, sending device is to the CB after carrying out additional CRC and coding
Rate-matched is carried out, to match the bearing capacity of the channel between sending device and receiving device.Sending device is carrying out rate
This is subjected to the CB after additional CRC, coding and rate-matched after matching and is sent to receiving device.Sending device sends data
It can be to the specific sending method of receiving device and sent by wireless signal, be also possible to send by other channels of connection,
This is not limited here.
In addition, if the length of the TB of additional CRC check position is not more than threshold value, it is believed that only cutting is a CB, hair to TB
It send equipment that this is directly added the TB behind CRC check position and carries out FEC coding, rate-matched is carried out to the TB after FEC coding later
After be sent to receiving device.Wherein, be not necessarily in the scene for carrying out cutting to TB, to the TB of no cutting carry out FEC coding and
Rate matching procedure after FEC coding, the FEC coding and rate carried out with the CB behind the additional CRC check position in earlier figures 2
Matching process is similar, and specific details are not described herein again.
In practical applications, which can adjust according to demand, for example, the threshold value can be 3824 in 5G system
Position.
The process that the embodiment of the present application receives the decoding after the data of sending device transmission to receiving device is changed
Into in the embodiment of the present application, the carry out FEC that sending device that receiving device can receive is sent is additional, coding and speed
CB after rate matching, is below illustrated the process flow of receiving device, please refers to Fig. 3.
For receiving device in the data for receiving sending device transmission, which can be additional CRC, FEC coding and speed
Rate matching after CB, to this add CRC, FEC coding and rate-matched after CB carry out solution rate-matched, obtain to be decoded
Coding codeword, the coding codeword are the CB after additional CRC and coding, then carry out LDPC decoding to the coding codeword, obtain
Then decoding is as a result, verify the decoding result.Specific verification mode may include the verification of LDPC check matrix or CRC
Verification.
It is available accurately by the CB of TB institute cutting after verification passes through, in practical applications, if after additional CRC
Therefore TB is split after at least two CB passes through decoding and verification determines, can carry out TB at least two CB
Recombination, obtains complete TB.Because sending device has carried out additional CRC to complete TB, thus also need to the obtained TB of recombination into
Row CRC check, when the result that the obtained TB of recombination carries out CRC check be by when, confirmation TB is completed, and receiving device can be at this time
An ACK message is generated, and is sent to sending device, which can be used for notifying sending device to successfully obtaining TB.Work as recombination
When obtained TB progress LDPC check matrix verification does not pass through, LDPC decoding can be carried out again, it can be identified that LDPC is decoded
Failure, when LDPC decoding failure or the result of CRC check be it is obstructed out-of-date, NACK message can be generated in receiving device, and sends
To sending device, to notify sending device TB or CB reception failure or decoding failure etc., sending device can weigh according to the actual situation
It is new to send data, it is obtained including leading to the CB of TB reconstructing failure or by TB cutting all after coding and rate-matched
CB。
The aforementioned data transmission stream journey to sending device in the embodiment of the present application and receiving device is illustrated, below it is right
The detailed process verified in the embodiment of the present application is described in detail, referring to Fig. 4, data verification method in the embodiment of the present application
One embodiment schematic diagram, comprising:
401, solution rate-matched is carried out to obtain coding codeword to received data；
Receiving device receives the data that sending device is sent, because receiving device has also carried out rate-matched to the data, because
This receiving device also needs to carry out solution rate-matched to the data, to obtain coding codeword, the coding codeword be additional CRC and
CB after coding.
402, coding codeword is decoded to obtain decoding result；
Receiving device is to coding codeword is obtained after solution rate-matched, i.e. CB after coding and additional CRC check position, and right
The coding codeword is decoded, and be can be and is carried out LDPC decoding to the coding codeword, and decodes to obtain decoding result by LDPC.
403, judge whether transport block size TBS is greater than threshold value, if so, 406 are thened follow the steps, if it is not, thening follow the steps
404；
Sending device may be used also other than it will add the CB after CRC check, coding and rate-matched and be sent to receiving device
To send control information to receiving device by control channel, to notify the length of the corresponding TB of the receiving device CB, i.e. TBS,
Receiving device may determine that whether TBS is greater than threshold value, if the TBS is greater than threshold value, then follow the steps 406, if the TBS is not more than threshold
Value, thens follow the steps 404.
404, decoding result is verified into LDPC check matrix；
TBS is determined no more than after threshold value in receiving device, and receiving device carries out joint survey to decoding result, that is, carries out
The verification of LDPC check matrix and CRC check, further, the verification of LDPC check matrix can be carried out with CRC check with timesharing, can be with
The verification of LDPC check matrix is first carried out, executes CRC check later.In practical application scene, if not passing through LDPC check matrix
Verification, receiving device is subsequent to may not need carry out CRC check, is further reduced the verification after the verification of LDPC check matrix does not pass through
Process reduces the complexity verified to decoding result.
405, CRC check is carried out to decoding result；
After receiving device is carrying out the verification of LDPC check matrix to decoding result, and the verification of LDPC check matrix passes through,
CRC check is carried out to decoding result.If LDPC check matrix verification and CRC all pass through, can determine decoding result be successfully,
And obtained decoding result is accurate.
It should be noted that in the embodiment of the present application, step 404 can be first carried out, step 405 can also be first carried out,
The verification of LDPC check matrix first can be carried out to decoding result, LDPC check matrix executes CRC check after passing through, can also be first
CRC check is carried out to decoding result, CRC check executes LDPC check matrix after passing through again, with specific reference to actual design demand tune
It is whole, it is not construed as limiting herein.
Specifically, CRC check concrete mode can be, receiving device agreement generator polynomial remove decoding as a result, if
There is remainder, then receiving device determines that CRC check does not pass through, and the error in data or decoding failure that receive, if without remainder,
Then receiving device, which determines, passes through the decoding result verification received, and the data decoding success to receiving.
406, decoding result is verified into LDPC check matrix.
If TBS is greater than threshold value, the verification of LDPC check matrix only is carried out to decoding result, without CRC check, if LDPC
Check matrix verification passes through, it is determined that the decoding result to coding codeword is successfully.
In the embodiment of the present application, the data of sending device transmission are received in receiving device, and carries out solution rate-matched
Coding codeword, that is, the CB after adding CRC and coding are obtained, and the CB after the coding and additional CRC decode
To after decoding result, selection can be compared according to TBS and threshold value and be verified to the verification mode of decoding result, including by LDPC
The joint survey of MATRIX CHECK-UP and CRC check composition and LDPC check matrix verify.Different size of TBS can choose different
Verification mode, TBS, which is greater than threshold value, can only carry out LDPC check matrix verification, can reduce receiving device to decoding result into
The complexity of row verification, and then reduce the power consumption that receiving device verifies decoding result.It, can and when carrying out joint survey
The verification of LDPC check matrix and CRC check are executed with timesharing, i.e., executes the verification of LDPC check matrix and the school CRC in different times
It tests, the complexity verified to decoding result can be further decreased.
The aforementioned process to the method for calibration for being applied to LDPC in the embodiment of the present application is illustrated, which can
To be CRC_16, i.e., 16 verifications, and when TBS is greater than threshold value, after carrying out the verification of LDPC check matrix and passing through, may be used also
To carry out CRC_24, i.e. 24 CRC checks, to determine the accuracy of decoding result.
In practical applications, usually under the lower scene of traffic rate, receiving device can carry out CRC_16 verification, example
Such as, in NR system, when TBS is not more than 3824,16 CRC check positions are added for CB, therefore, when receiving device is to this
When TB is verified, it is also necessary to carry out CRC_16 verification to decoding result.Under the higher scene of traffic rate, for example, working as CB
When length is greater than 3824, the CRC check position that sending device is CB additional 24, therefore, when receiving device to decoding result into
When row verification, CRC_24 verification is carried out to decoding result.
Below in a manner of a specific embodiment in the embodiment of the present application be applied to LDPC method of calibration carry out into
Illustrate to one step.Referring to Fig. 5, another embodiment schematic diagram in the embodiment of the present application applied to the method for calibration of LDPC,
Include:
501, solution rate-matched is carried out to obtain coding codeword to received data；
Step 501 in the embodiment of the present application is similar with the step 401 in earlier figures 4, and specific details are not described herein again.
502, coding codeword is decoded to obtain decoding result；
Receiving device to the data received carry out solution rate-matched obtain coding codeword after, the coding codeword carry out LDPC
Decoding, being decoded as a result, the decoding result also carries out verification just can determine that the decoding result for the target data just
Really decoding result.
Part ginseng when last decoding failure can be used when being iterated decoding to the target data in receiving device
Number, for example, using identical code length, code rate or normalization factor etc..Decoding can also be iterated to target data again, had
Body can be adjusted according to actual design demand, and this is not limited here.
Receiving device can carry out multiple LDPC iterative decoding to target data, in LDPC iterative decoding process each time
In, the verification of LDPC check matrix all is carried out to decoding result, if the verification of LDPC check matrix and CRC_16 verification all pass through,
It is subsequent to no longer need to carry out LDPC decoding.If one of them of the verification of LDPC check matrix and CRC_16 do not pass through, and iteration time
When number is less than predetermined times, LDPC iterative decoding can proceed with, all passed through with the verification of LDPC check matrix and CRC_16, or
Until the number of iterations reaches predetermined times, i.e., when the verification of LDPC check matrix and one of them of CRC_16 do not pass through, and repeatedly
Generation number reaches preset number, then without continuing LDPC decoding, receiving device is determined is receiving device to decoding result
Failure.
503, judge whether transport block size TBS is greater than threshold value, if so, 507 are thened follow the steps, if it is not, thening follow the steps
504；
Receiving device can determine the verification mode to decoding result according to the size of TBS, which works as receiving device
Before the length added after CRC of the corresponding TB of CB included by the data that receive thened follow the steps if the TBS is greater than threshold value
507, if the TBS is not more than threshold value, then follow the steps 504.
Wherein, which can be 3824, and the even TBS is greater than 3824,507 be thened follow the steps, if the TBS is not more than
3824, then follow the steps 504.
504, the verification of LDPC check matrix is carried out to decoding result and thens follow the steps 505 if passing through, if not passing through, held
Row step 502；
LDPC decoding is being carried out, after obtaining decoding result, receiving device carries out LDPC to the decoding result first and verifies square
Battle array verification, and judge whether the verification of LDPC check matrix passes through, if the verification of LDPC check matrix passes through, 505 are thened follow the steps, i.e.,
The CRC_16 verification for carrying out next step can execute step 502 if the verification of LDPC check matrix does not pass through, it can continue
Carry out LDPC decoding.In practical applications, it when the number of iterations for carrying out LDPC decoding reaches preset number, can also determine
LDPC decoding failure no longer needs to continue LDPC decoding.
When receiving device carries out the verification of LDPC check matrix to decoding result, LDPC check matrix verification can be verification
MATRIX CHECK-UP may include one or more check matrixes, and be carried out by the one or more check matrix to decoding result
Verification.For example, being verified using check matrix and determining that the detailed process of check results can be, multiplied using check matrix
One preset vector obtains a result vector, if the value in the result vector is all 0, can determine that LDPC verifies square
Battle array verification passes through, if the value in the result vector is not all 0, can determine that the verification of LDPC check matrix does not pass through.
Further, there are certain false-alarm probability (False Alarm Ratio, FAR) for receiving device, that is, receive and set
Standby upper reality does not have signal presence, but makes the probability of the mistaken verdict of " having signal ", the school verified using LDPC check matrix
All check-nodes tested in matrix decode decoding result, will reduce the efficiency to decoding result verification, existing can not
The case where obtaining correct check results.Therefore, to further increase the efficiency for carrying out the verification of LDPC check matrix, when FAR is pre-
When setting range, receiving device can verify decoding result only with the object identifier formula in check matrix to obtain verification knot
Fruit, and the check results that the check results are verified as LDPC check matrix, for example, receiving device can use check matrix
In the first row verification formula check results as LDPC check matrix check results, or using the fifth line in check matrix
Verification formula check results as LDPC check matrix check results etc., can be adjusted according to actual design demand, specifically herein
It is not construed as limiting.In the embodiment of the present application, the check results that the verification of the part in check matrix formula can be used in receiving device are made
For LDPC check matrix verification check results, without using the check results of all verification formulas as LDPC check matrix verification
Check results.And judge that LDPC check matrix verifies by the check results of object identifier formula in LDPC check matrix verification
Whether pass through, can be further improved the efficiency that receiving device carries out the verification of LDPC check matrix, reduces LDPC check matrix school
The implementation complexity tested.
505, CRC_16 verification is carried out to decoding result and thens follow the steps 506 if passing through, if not passing through, thened follow the steps
502；
Receiving device carries out CRC_16 verification to decoding result, obtains a check results.And sentenced by the check results
Whether disconnected first CRC check passes through, if CRC_16 verification passes through, thens follow the steps 506, i.e. receiving device is determined to target data
The result of decoding be successfully, and decode result it is accurate, if CRC_16 verification do not pass through, then follow the steps 502, that is, continue
LDPC decoding.In practical applications, when the number of iterations for carrying out LDPC decoding reaches preset number, LDPC can also be determined
Decoding failure no longer needs to continue LDPC decoding.
Wherein, the specific steps for carrying out CRC_16 verification can be, and receiving device is used for 16 lifes of sending device agreement
It is decoded at deconv as a result, receiving device determines that CRC_16 verification does not pass through, and the data received are wrong if there is remainder
Accidentally or decoding failure, if receiving device, which determines, passes through the decoding result verification received, and to receiving without remainder
Data decoding success, and decode result it is accurate.
In addition, in the embodiment of the present application, step 504 can be first carried out, and it is rear to execute step 505, step can also be first carried out
Rapid 505, it is rear to execute step 504, it can the verification of LDPC check matrix is first carried out, carries out CRC_16 verification later, it can also be first
CRC_16 verification is carried out, the verification of LDPC check matrix is carried out later, can specifically be adjusted according to actual design demand, not made herein
It limits.
506, determine it is successfully decoded, and decode result it is accurate；
After receiving device carries out CRC_16 verification and pass through to decoding result, receiving device can determine that carrying out LDPC translates
The result of code is successfully, i.e., successfully to decode to coding codeword, and the result decoded is accurate, i.e. decoding result and sending device
CB matching before carrying out coding and additional CRC, receiving device get accurate CB.
507, the verification of LDPC check matrix is carried out to decoding result and thens follow the steps 508 if passing through, if not passing through, held
Row step 502；
It is greater than threshold value in TBS, includes the case where that TBS is greater than 3824, receiving device only needs to carry out the school LDPC to decoding result
MATRIX CHECK-UP is tested, to determine whether decoding result succeeds, if the verification of LDPC check matrix passes through, 508 are thened follow the steps, if LDPC
Check matrix verification does not pass through, thens follow the steps 502.
In practical applications, when the number of iterations for carrying out LDPC decoding reaches preset number, LDPC can also be determined
Decoding failure no longer needs to continue LDPC decoding.
508, it determines successfully decoded；
After the verification of LDPC check matrix passes through, receiving device can determine that the result of LDPC decoding is successfully.In addition, connecing
Receiving unit determine it is successfully decoded after, it is also necessary to confirmation decoding result it is whether accurate, i.e., decoding result whether with sending device into
Row coding and additional CRC before CB matching, and hence it is also possible to carry out CRC_24 verification.
509, CRC_24 verification is carried out to decoding result.
When TBS is greater than threshold value, i.e. TBS is greater than 3824, and receiving device is carrying out the verification of LDPC check matrix to decoding result
Pass through, determine it is successfully decoded after, receiving device can continue to decoding result carry out CRC_24 verification, with determine decoding the result is that
The no CB carried out with sending device before coding and additional CRC is matched.If CRC_24 verification passes through, receiving device can be determined
It is accurate to decode result, gets accurate CB.
If the CB is one in multiple CB of TB cutting, receiving device is getting all CB in multiple CB
Afterwards, it is also necessary to the TB be recombinated using multiple CB, to obtain complete TB.
In practical communication system, in the lower situation of traffic rate, i.e. TBS less than 3824, only to decoding result into
The error that the verification of row LDPC check matrix generates is too big, and ample time, can be verified by LDPC check matrix and CRC_16
Whether the common confirmation target data of verification is successfully decoded, and in the higher situation of traffic rate, carry out LDPC check matrix school
The result tested is stablized, therefore after the verification of LDPC check matrix passes through, receiving device can be determined and is decoded into target data
Function.After determination is successfully decoded to target data, receiving device carries out CRC_24 verification to decoding result again, to determine target
Whether data receive accurately.Therefore, in practical communication scene, CRC_16 usually be can be when in the lower situation of traffic rate
It executes, i.e., executes CRC_16 verification when the length of TB is not more than 3824.CRC_24 verification usually can be when communication speed
It is executed in the higher situation of rate, when the length of TB is greater than 3824, receiving device can pass through in LDPC MATRIX CHECK-UP, and
Determine it is successfully decoded after carry out CRC_24 verification again.
In the embodiment of the present application, receiving device to decoding result verify when, TBS be greater than 3824 when, only into
The verification of row LDPC check matrix, it is successfully decoded with determination, the stream for carrying out CRC_24 verification can be reduced when determining successfully decoded
Journey, determine it is successfully decoded after, then carry out CRC_24 verification, have ensured that the accuracy of the CB got.It is greater than 3824 in TBS
When, it carries out the verification of LDPC check matrix and is verified with CRC_16, it is successfully decoded with determination, and the verification of LDPC check matrix and CRC_16
It is verified as timesharing progress, and executes the verification of LDPC check matrix in different time and is verified with CRC_16, receiving device can be reduced
To the complexity that decoding result is verified, and then reduce power consumption of the receiving device when being verified.
The aforementioned detailed process to the method for calibration provided by the embodiments of the present application applied to LDPC is described in detail,
The device in the embodiment of the present application is illustrated below, referring to Fig. 6, one of calibration equipment implementation in the embodiment of the present application
It illustrates and is intended to, comprising:
Solve velocity module 601, be used to analyze the received data carry out solution rate-matched to obtain coding codeword, the coding codeword
To add the CB after CRC and coding, which is to be sent by sending device；
Decoding module 602, the coding codeword for obtaining to solution velocity module 601 are decoded to obtain decoding result；
Determining module 603, for determining verification mode according to TBS, the verification mode be by LDPC check matrix verification and
The joint survey of cyclic redundancy check verification composition or the verification of LDPC check matrix, the TBS can be sent by sending device
Arrive, which is the length of TB, which is split as one or more CB, the CB in the coding codeword for the TB institute cutting CB
In one；
Correction verification module 604, the decoding that the verification mode for being determined according to the determining module 603 decodes the decoding module
As a result it is verified.
Optionally, in some possible embodiments, determining module 603 is specifically used for:
The TBS and threshold value are compared；
The TBS be not more than the threshold value when, determine the verification mode be by the LDPC check matrix verification and
The joint survey of the CRC check composition；
When the TBS is greater than the threshold value, determine the verification mode for LDPC check matrix verification.
Optionally, in some possible embodiments, which is 3824.
Optionally, in some possible embodiments, joint verification is 16 by the verification of LDPC check matrix and length
The CRC check composition of position.
Optionally, in some possible embodiments, correction verification module 604 is specifically used for:
When the verification mode is that the joint verifies, LDPC check matrix checksum CRC is carried out to decoding result timesharing
Verification carries out the verification of LDPC check matrix checksum CRC in different times.
Optionally, in some possible embodiments, the verification of LDPC check matrix may include verifying square using LDPC
The part verification formula of battle array is verified.
Fig. 7 is a kind of communication apparatus construction schematic diagram provided in an embodiment of the present invention, the communication equipment 700 can because of configuration or
Performance is different and generates bigger difference, may include one or more central processing units (central
Processing units, CPU) 722 (for example, one or more processors), one or more storages are using journey
The storage medium 730 (such as one or more mass memory units) of sequence 742 or data 744.Wherein, storage medium 730
It can be of short duration storage or persistent storage.The program for being stored in storage medium 730 may include one or more module (figures
Show and do not mark), each module may include to the series of instructions operation in communication equipment.Further, central processing unit
722 can be set to communicate with storage medium 730, and the series of instructions behaviour in storage medium 730 is executed on communication equipment 700
Make.
The central processing unit 722 can operate according to instruction and execute following steps:
In the data for receiving sending device transmission, after which can be additional CRC, FEC coding and rate-matched
CB, to this add CRC, FEC coding and rate-matched after CB carry out solution rate-matched, obtain sending device carry out rate
The CB after additional CRC and coding before matching, then carries out LDPC decoding to the CB after adding CRC and encoding, obtains
As a result, determining the verification mode to the decoding result according to TBS later, which, which can be, combines verification for decoding, can also
To be the verification of LDPC check matrix, joint verification includes the verification of LDPC check matrix and CRC check.TBS is receiving device solution
The length of the TB behind CRC check position is completely added corresponding to CB after rate-matched, which can be is led to by sending device
Cross control channel transmission.
Communication equipment 700 can also include one or more power supplys 726, one or more wired or wireless nets
Network interface 750, one or more input/output interfaces 758, and/or, one or more operating systems 741, such as
Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM etc..
The step as performed by calibration equipment can be based on the communication apparatus construction shown in Fig. 7 in above-described embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes each implementation example figure 3 of the application to described in Fig. 5
The all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with
Store the medium of program code.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the range of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (14)
1. a kind of method of calibration applied to low-density parity-check inspection LDPC characterized by comprising
Solution rate-matched is carried out to obtain coding codeword to received data；
The coding codeword is decoded to obtain decoding result；
Verification mode is determined according to transport block size TBS, and the verification mode is to be verified by LDPC check matrix and cyclic redundancy
Detect the joint survey or the verification of LDPC check matrix of CRC check composition；
The decoding result is verified according to the verification mode of the determination.
2. method of calibration as described in claim 1, which is characterized in that described to determine verification mode according to transport block size TBS
Include:
The TBS and threshold value are compared；
The TBS be not more than the threshold value when, determine the verification mode be by the LDPC check matrix verification and it is described
The joint survey of CRC check composition；
When the TBS is greater than the threshold value, determine the verification mode for LDPC check matrix verification.
3. method of calibration as claimed in claim 2, which is characterized in that the threshold value is 3824.
4. method of calibration as claimed in claim 3, which is characterized in that the joint verification is verified by the LDPC check matrix
The CRC check for being 16 with length forms.
5. the method for calibration as described in claim 1-4 is any, described according to institute when the verification mode is that the joint verifies
It states determining verification mode and the decoding result verify and include:
The LDPC check matrix verification and the CRC check are carried out to the decoding result timesharing.
6. method of calibration a method as claimed in any one of claims 1 to 5, which is characterized in that the LDPC check matrix verification includes using
The part verification formula of the LDPC check matrix is verified.
7. a kind of calibration equipment characterized by comprising
Velocity module is solved, is used to analyze the received data and carries out solution rate-matched to obtain coding codeword；
Decoding module, the coding codeword for obtaining to the solution velocity module are decoded to obtain decoding result；
Determining module, for determining that verification mode, the verification mode are by LDPC check matrix school according to transport block size TBS
Test the joint survey or the verification of LDPC check matrix with cyclic redundancy check verification composition；
Correction verification module, the decoding result that the verification mode for being determined according to the determining module decodes the decoding module into
Row verification.
8. calibration equipment as claimed in claim 7, which is characterized in that the determining module is specifically used for:
The TBS and threshold value are compared；
The TBS be not more than the threshold value when, determine the verification mode be by the LDPC check matrix verification and it is described
The joint survey of CRC check composition；
When the TBS is greater than the threshold value, determine the verification mode for LDPC check matrix verification.
9. calibration equipment as claimed in claim 8, which is characterized in that the threshold value is 3824.
10. calibration equipment as claimed in claim 9, which is characterized in that the joint verification is by LDPC check matrix school
The CRC check for being 16 with length is tested to form.
11. the calibration equipment as described in claim 7-10 is any, which is characterized in that the correction verification module is specifically used for:
When the verification mode is that the joint verifies, the LDPC check matrix is carried out to the decoding result timesharing and is verified
With the CRC check.
12. the calibration equipment as described in claim 7-11 is any, which is characterized in that the LDPC check matrix verification includes adopting
It is verified with the part of LDPC check matrix verification formula.
13. a kind of communication equipment characterized by comprising
Memory, for storing program；
Processor, for executing the described program of the memory storage, when described program is performed, the processor is used for
Execute such as step as claimed in any one of claims 1 to 6.
14. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes such as
Method described in any one of claim 1-6.
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| CN201810065301.0A CN110071780B (en) | 2018-01-23 | 2018-01-23 | Check method and device applied to low-density parity check LDPC (Low Density parity check), and communication equipment |
| PCT/CN2019/072660 WO2019144862A1 (en) | 2018-01-23 | 2019-01-22 | Method and device for low density parity check, and communication device |
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| CN114301575A (en) * | 2021-12-21 | 2022-04-08 | 阿里巴巴（中国）有限公司 | Data processing method, system, device and medium |
| TWI804359B (en) * | 2022-06-23 | 2023-06-01 | 慧榮科技股份有限公司 | Method and apparatus for decoding low-density parity-check (ldpc) code |
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| US20090150745A1 (en) * | 2007-12-05 | 2009-06-11 | Aquantia Corporation | Trapping set decoding for transmission frames |
| CN106961319A (en) * | 2016-01-12 | 2017-07-18 | 中兴通讯股份有限公司 | A kind of method and apparatus of data processing |
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| CN101159514A (en) * | 2007-10-31 | 2008-04-09 | 中兴通讯股份有限公司 | Method of adding cyclic redundancy code of transmission block |
| CN102237953B (en) * | 2010-05-05 | 2014-06-11 | 中兴通讯股份有限公司 | LTE (Long Term Evolution) PDSCH (Physical Downlink Shared Channel) rate de-matching method and device |
| CN106788456B (en) * | 2016-12-14 | 2019-09-03 | 电子科技大学 | A kind of polarization code coding/decoding method |
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| US20090150745A1 (en) * | 2007-12-05 | 2009-06-11 | Aquantia Corporation | Trapping set decoding for transmission frames |
| CN106961319A (en) * | 2016-01-12 | 2017-07-18 | 中兴通讯股份有限公司 | A kind of method and apparatus of data processing |
| CN108287771A (en) * | 2017-12-27 | 2018-07-17 | 沈阳东软医疗系统有限公司 | A kind of data verification method, device and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114301575A (en) * | 2021-12-21 | 2022-04-08 | 阿里巴巴（中国）有限公司 | Data processing method, system, device and medium |
| CN114301575B (en) * | 2021-12-21 | 2024-03-29 | 阿里巴巴（中国）有限公司 | Data processing method, system, equipment and medium |
| TWI804359B (en) * | 2022-06-23 | 2023-06-01 | 慧榮科技股份有限公司 | Method and apparatus for decoding low-density parity-check (ldpc) code |
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| WO2019144862A1 (en) | 2019-08-01 |
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