CN105634668B - A kind of empty inspection screening method and device of DCI0 signal - Google Patents
A kind of empty inspection screening method and device of DCI0 signal Download PDFInfo
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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
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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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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Abstract
This application provides a kind of empty examine of DCI0 signal to determine method and device, convolution coding, which is carried out, by the DCI0 signal gone out to blind examination obtains First ray, and by carrying out hard decision to Soft Inform ation, obtain the second sequence, the Soft Inform ation is during blind examination, input the input signal of decoder, the DCI0 signal that the blind examination goes out is during the blind examination, the output signal of the decoder, and judge whether the First ray and second sequence are identical, if it is, then determine that the DCI0 signal that the blind examination goes out is non-empty inspection signal, the DCI0 signal that i.e. blind examination goes out is true DCI0 signal.It can be seen that, method and device described in the present embodiment, no longer using the characteristic of empty inspection signal as the screening foundation of void inspection, but basis signal convolutional encoding and the hard decision sequence of Soft Inform ation judge whether empty inspection, therefore, can be avoided leads to the possibility that missing inspection occurs because empty inspection is reduced.
Description
Technical field
This application involves the communications field more particularly to the empty inspection screening methods and device of a kind of DCI0 signal.
Background technique
In the uplink of LTE system, DCI0 plays an important role, and base station sends DCI0 to UE by downlink
To dispatch the uplink behavior of UE.UE needs the blind examination DCI0 on specific time and frequency resource, and whether confirmation base station is sent out
DCI0 has been sent, and has made corresponding response.
After UE thinks to detect DCI0, corresponding uplink behavior can be made according to the information in the DCI0.So
If the DCI0 is that empty inspection, i.e. base station and not sent DCI0 but detect DCI0, then can cause unnecessary operation to the UE, UE,
Influence network performance.It is therefore desirable to the DCI0 gone out to blind examination to carry out further screening, to determine whether it is empty inspection.
The empty inspection screening method of existing DCI0, the usually characteristic according to the DCI0 of empty inspection are judged, for example, because empty
When carrying out viterbi soft decoding, the sum of distance metric value of likelihood path leads to the DCI0 of inspection compared with the DCI0 of non-empty inspection
Often larger, therefore, the sum of distance metric value of likelihood path of DCI0 gone out such as blind examination is greater than some value, then it is assumed that it is void
Inspection.
And in practical applications, although the DCI0 of empty inspection has some common characteristics, conversely, non-blind examination
DCI0 does not just have these characteristics not necessarily, so, the empty inspection screening method of existing DCI0, there are missing inspections (i.e. will be correct
DCI0 is determined as the DCI0 of empty inspection) risk.
Summary of the invention
This application provides the empty inspection screening methods and device of a kind of DCI0 signal, it is therefore intended that solves determining that DCI0 is
In the case where the no inspection for void, existing missing inspection problem.
To achieve the goals above, this application provides following technical schemes:
A kind of empty inspection screening method of DCI0 signal, comprising:
Convolution coding is carried out by the DCI0 signal gone out to blind examination and obtains First ray, and by carrying out to Soft Inform ation
Hard decision, obtains the second sequence, and the Soft Inform ation is to input the input signal of decoder, the blind examination goes out during blind examination
DCI0 signal be during the blind examination, the output signal of the decoder；
Judge whether the First ray and second sequence are identical, if it is, determining the DCI0 that the blind examination goes out
Signal is non-empty inspection signal.
Optionally, described to judge whether the First ray is identical as second sequence and include:
The First ray and second sequence are subjected to XOR operation, third sequence is obtained, if the third sequence
Element in column is zero, it is determined that the First ray is identical as second sequence, otherwise, it determines the First ray with
Second sequence is not identical.
Optionally, further includes:
If the First ray and second sequence be not identical, by being not zero to all in the third sequence
The position of element is reordered, and the 4th sequence is obtained；
M element is selected from the 4th sequence, the M is the integer greater than zero；
Each of M element element is handled as follows according to sequence of positions respectively: using the value of this element as position
Serial number is set, the corresponding element of the position number is taken out from the Soft Inform ation, soft-decision is carried out to the element of taking-up, use is soft
The result of judgement substitutes original value of the element of the taking-up in the Soft Inform ation, obtains the 5th sequence, by the 5th sequence
Column carry out retranslating code；
If the DCI0 signal that the result and the blind examination of retranslating code for M times go out is all the same, it is determined that the blind examination went out
DCI0 signal is true DCI0 signal, otherwise, it determines the DCI0 signal that the blind examination goes out is empty inspection signal.
Optionally, it is described the third sequence reorder include:
According to rule:To third sequence
ColumnIt reorders, whereinIndicate downward rounding operation.
Optionally, described to include: by this element progress soft-decision
It is 0 by the value judgement of this element when the value of this element is greater than or equal to 4, otherwise, is by the value judgement of this element
7。
A kind of empty inspection determining device of DCI0 signal, comprising:
Retrieval module carries out convolution coding for the DCI0 signal by going out to blind examination and obtains First ray, with
And by carrying out hard decision to Soft Inform ation, the second sequence is obtained, the Soft Inform ation is to input the defeated of decoder during blind examination
Enter signal, the DCI0 signal that the blind examination goes out is the output signal of the decoder during blind examination；
Judgment module, for judging whether the First ray and second sequence are identical, if it is, described in determining
The DCI0 signal that blind examination goes out is non-empty inspection signal.
Optionally, the judgment module includes: for judging whether the First ray is identical as second sequence
The judgment module is specifically used for, and the First ray and second sequence are carried out XOR operation, obtains the
Three sequences, if the element in the third sequence is zero, it is determined that the First ray is identical as second sequence, no
Then, determine that the First ray and second sequence be not identical.
Optionally, the judgment module is also used to:
If the First ray and second sequence be not identical, by being not zero to all in the third sequence
The position of element is reordered, and the 4th sequence is obtained；
M element is selected from the 4th sequence, the M is the integer greater than zero；
Each of M element element is handled as follows according to sequence of positions respectively: using the value of this element as position
Serial number is set, the corresponding element of the position number is taken out from the Soft Inform ation, soft-decision is carried out to the element of taking-up, use is soft
The result of judgement substitutes original value of the element of the taking-up in the Soft Inform ation, obtains the 5th sequence, by the 5th sequence
Column carry out retranslating code；
If the DCI0 signal that the result and the blind examination of retranslating code for M times go out is all the same, it is determined that the blind examination went out
DCI0 signal is true DCI0 signal, otherwise, it determines the DCI0 signal that the blind examination goes out is empty inspection signal.
Optionally, the judgment module includes: for reorder to the third sequence
The judgment module is specifically used for, according to rule:
To third sequence
It reorders, whereinIndicate downward rounding operation.
Optionally, the judgment module for including: by this element progress soft-decision
The judgment module is specifically used for, and is 0 by the value judgement of this element when the value of this element is greater than or equal to 4, no
It then, is 7 by the value judgement of this element.
The empty inspection screening method and device of DCI0 signal described herein, are rolled up by the DCI0 signal gone out to blind examination
Product code encodes to obtain First ray, and by carrying out hard decision to Soft Inform ation, obtains the second sequence, the Soft Inform ation is blind
During inspection, the input signal of decoder is inputted, the DCI0 signal that the blind examination goes out is the decoding during blind examination
The output signal of device, and judge whether the First ray and second sequence are identical, if it is, determining that the blind examination goes out
DCI0 signal be it is non-it is empty examine signal, i.e., the DCI0 signal that blind examination goes out is true DCI0 signal.As it can be seen that described in the present embodiment
Method and device, no longer using the characteristic of empty inspection signal as the empty screening foundation examined, but the coding of basis signal convolution and soft
The hard decision sequence of information judges whether empty inspection, and therefore, can be avoided leads to the possibility that missing inspection occurs because empty inspection is reduced.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow chart of the empty inspection screening method of DCI0 signal disclosed in the embodiment of the present application；
Fig. 2 is the flow chart of the empty inspection screening method of another DCI0 signal disclosed in the embodiment of the present application；
Fig. 3 is a kind of structural schematic diagram of the empty inspection screening apparatus of DCI0 signal disclosed in the embodiment of the present application.
Specific embodiment
The embodiment of the present application discloses the empty inspection screening method and device of a kind of DCI0 signal, can apply in LTE system
In, LTE system is all based on cellular network architecture, in each cellular cell, has a base station to provide service, user terminal
(User Equipment, UE) passes through the communication between base station accessing mobile communication network or realization user.In cellular networks, base
Stand leading position, realizes the allotment to UE to provide service.The transmission link of UE to base station is usually known as uplink, instead
Be known as downlink.
In uplink, DCI0 plays an important role, and base station sends DCI0 to UE to dispatch the upper of UE by downlink
Row transport behavior.So UE will get on blind examination DCI0 in specific time and frequency resource, whether confirmation base station has sent DCI0,
And make corresponding response.
In general, base station when sending DCI0, carries out CRC (Cyclic to the information bit for including in DCI0 first
Redundancy Check, cyclic redundancy check) coding, after obtaining 16 check codes and making corresponding scrambling code, grade is associated in DCI0
Behind information, then the convolution coding of 1/3 code rate is carried out, is emitted after eventually passing through respective handling by transmitter.
In receiving end, UE desired DCI0 of blind examination on specific time and frequency resource exists the signal received
It after respective handling, is sent into Convolutional Decoder Assembly and is decoded, decoding result is admitted to CRC check device, school after making corresponding descrambling
It tests and is correctly then considered DCI0, otherwise abandon.Wherein, the input signal of Convolutional Decoder Assembly (such as viterbi soft decoder)
One of be Soft Inform ation, output signal be blind examination go out DCI0 signal.
If the Soft Inform ation into viterbi soft decoder isWherein N is DCI0
Length, CRC check position are 16 bits, so total length is 3N+48 after 1/3 coding.Obtained after decoding the two of N+16 bit length into
Sequence processed is expressed as without loss of generality
Whether DCI0 signal of the method and device described in the embodiment of the present application for screening UE blind examination to go out is empty inspection letter
Number.
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
The embodiment of the present application discloses a kind of empty inspection screening method of DCI0 signal, as shown in Figure 1, comprising the following steps:
S101: pass through the DCI0 signal gone out to blind examinationIt carries out convolution coding and obtains First ray
And by Soft Inform ationHard decision is carried out, the second sequence is obtained:
I.e.
S102: judge the First rayWith second sequenceIt is whether identical, if it is not, then holding
Row S103, if it is, executing S104；
S103: determine that the DCI0 signal that the blind examination goes out is doubtful empty inspection signal.
S104: determine that the DCI0 signal that the blind examination goes out is true DCI0 signal.
In the present embodiment, the value after result recompiles will be decoded and be compared between Soft Inform ation hard-decision values, it can
It reduces because caused by empty inspection screening a possibility that DCI0 signal missing inspection, to solve missed detection risk of the existing technology
Problem, also, method described in the present embodiment can be improved the validity of empty inspection screening, realize the efficiency for reducing empty inspection
It is promoted, so that empty inspection probability cannot be reduced by solving the problem of that efficiency of the existing technology is lower enoughly.
The empty inspection screening method of another DCI0 signal disclosed in the present application, as shown in Figure 2, comprising the following steps:
S201: pass through the DCI0 signal gone out to blind examinationIt carries out 1/3 convolution coding and obtains First ray
S202: by Soft Inform ationHard decision is carried out, the second sequence is obtained:I.e.
S203: the First ray and second sequence are subjected to XOR operation, obtain third sequence；
That is: third sequence
S204: judge third sequenceIn element whether be zero, if so, execute S205, if not, holding
Row S206；
S205: determine that the DCI0 signal that the blind examination goes out is true DCI0 signal；
S206: third sequence is found outIn be 0 element position, i.e., l | pl≠ 0, l=1,2 ..., 3N+48 }
All values in set, if the gesture of set is n, then all positions that are not zero may be expressed as:
S207: it reorders to the position of all elements being not zero, obtains the 4th sequence, be denoted asRanking method
It is then as follows:
WhereinIndicate downward rounding operation.
S208: selecting M element from the 4th sequence, and the M is the integer greater than zero；
S209: each of M element element is handled as follows respectively according to sequence of positions: the value of this element is made
For position number, the corresponding element of the position number is taken out from the Soft Inform ation, and soft-decision is carried out to the element of taking-up, is made
Original value of the element of the taking-up in the Soft Inform ation is substituted with the result of soft-decision, obtains the 5th sequence, by described
Five sequences carry out retranslating code；
It specifically, is 0 by the value judgement of this element when the value of this element is greater than or equal to 4 in the present embodiment, otherwise,
It is 7 by the value judgement of this element.
For example, the value l ' for being located at jth position will be taken out in jth time cache flush modej, and enable
By sequenceIt is sent into the decoding of viterbi soft decoder, obtains sequence
The DCI0 signal that S210: judging to retranslate for M times the result of code and the blind examination goes out is all the same, if so, S211 is executed,
If not, executing S212；
S211: determine that the DCI0 signal that the blind examination goes out is true DCI0 signal.
S212: determine the DCI0 signal that the blind examination goes out for empty inspection signal.
Method described in the present embodiment has stressed under First ray and the different situation of the second sequence, right
The doubtful DCI0 signal that blind examination goes out further is screened, and further determines that whether it is the empty process for examining signal, compared to upper
Method described in one embodiment has higher accuracy.
With above method embodiment correspondingly, the embodiment of the present application also discloses a kind of empty inspection screening dress of DCI0 signal
It sets, as shown in Figure 3, comprising:
Retrieval module 301 carries out convolution coding for the DCI0 signal by going out to blind examination and obtains First ray,
And by carrying out hard decision to Soft Inform ation, the second sequence is obtained, the Soft Inform ation is to input decoder during blind examination
Input signal, the DCI0 signal that the blind examination goes out are the output signal of the decoder during blind examination；
Judgment module 302, for judging whether the First ray and second sequence are identical, if it is, determining
The DCI0 signal that the blind examination goes out is non-empty inspection signal.
Specifically, judgment module judges that the First ray and the whether identical specific implementation of second sequence can
With are as follows: the First ray and second sequence are subjected to XOR operation, third sequence is obtained, if in the third sequence
Element be zero, it is determined that the First ray is identical as second sequence, otherwise, it determines the First ray with it is described
Second sequence is not identical.
Further, judgment module can be also used for: if the First ray and second sequence be not identical, pass through
It reorders to the position of all elements being not zero in the third sequence, obtains the 4th sequence；
M element is selected from the 4th sequence, the M is the integer greater than zero；
Each of M element element is handled as follows according to sequence of positions respectively: using the value of this element as position
Serial number is set, the corresponding element of the position number is taken out from the Soft Inform ation, soft-decision is carried out to the element of taking-up, use is soft
The result of judgement substitutes original value of the element of the taking-up in the Soft Inform ation, obtains the 5th sequence, by the 5th sequence
Column carry out retranslating code；
If the DCI0 signal that the result and the blind examination of retranslating code for M times go out is all the same, it is determined that the blind examination went out
DCI0 signal is true DCI0 signal, otherwise, it determines the DCI0 signal that the blind examination goes out is empty inspection signal.
Wherein, the specific implementation to reorder to the third sequence can be with are as follows: according to rule:
To third sequenceIt reorders, whereinIndicate downward rounding operation.
The specific implementation that this element is carried out soft-decision can be with are as follows: when the value of this element is greater than or equal to 4, by this
The value judgement of element is 0, is 7 by the value judgement of this element otherwise.
Device described in the present embodiment will decode the value after result recompiles and carry out between Soft Inform ation hard-decision values
Compare, can reduce because caused by empty inspection screening a possibility that DCI0 signal missing inspection, also, improve the effective of empty inspection screening
Property.
If function described in the embodiment of the present application method is realized in the form of SFU software functional unit and as independent production
Product when selling or using, can store in a storage medium readable by a compute device.Based on this understanding, the application is real
The part for applying a part that contributes to existing technology or the technical solution can be embodied in the form of software products,
The software product is stored in a storage medium, including some instructions are used so that a calculating equipment (can be personal meter
Calculation machine, server, mobile computing device or network equipment etc.) execute each embodiment the method for the application whole or portion
Step by step.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with it is other
The difference of embodiment, same or similar part may refer to each other between each embodiment.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (6)
1. a kind of empty inspection screening method of DCI0 signal characterized by comprising
Convolution coding is carried out by the DCI0 signal gone out to blind examination and obtains First ray, and by being sentenced firmly to Soft Inform ation
Certainly, the second sequence is obtained, the Soft Inform ation is to input the input signal of decoder during blind examination, what the blind examination went out
DCI0 signal is the output signal of the decoder during blind examination；
Judge whether the First ray and second sequence are identical, if it is, determining the DCI0 signal that the blind examination goes out
For non-empty inspection signal；
It is described to judge whether the First ray is identical as second sequence and include:
The First ray and second sequence are subjected to XOR operation, third sequence is obtained, if in the third sequence
Element be zero, it is determined that the First ray is identical as second sequence, otherwise, it determines the First ray with it is described
Second sequence is not identical；
Further include:
If the First ray and second sequence be not identical, by all elements being not zero in the third sequence
Position reorder, obtain the 4th sequence；
M element is selected from the 4th sequence, the M is the integer greater than zero；
Each of M element element is handled as follows according to sequence of positions respectively: using the value of this element as position-order
Number, the corresponding element of the position number is taken out from the Soft Inform ation, and soft-decision is carried out to the element of taking-up, uses soft-decision
Result substitute original value of the element of the taking-up in the Soft Inform ation, obtain the 5th sequence, by the 5th sequence into
Row retranslates code；
If the DCI0 signal that the result and the blind examination of retranslating code for M times go out is all the same, it is determined that the DCI0 letter that the blind examination goes out
It number is true DCI0 signal, otherwise, it determines the DCI0 signal that the blind examination goes out is empty inspection signal.
2. the method according to claim 1, wherein it is described the third sequence reorder include:
According to rule:To third sequenceli< li+1It reorders, whereinIndicate that downward rounding operation, n indicate all in the third sequence and be not zero
Element position number.
3. method according to claim 1 or 2, which is characterized in that described to include: by this element progress soft-decision
It is 0 by the value judgement of this element when the value of this element is greater than or equal to 4, is 7 by the value judgement of this element otherwise.
4. a kind of empty inspection determining device of DCI0 signal characterized by comprising
Retrieval module carries out convolution coding for the DCI0 signal by going out to blind examination and obtains First ray, Yi Jitong
It crosses and hard decision is carried out to Soft Inform ation, obtain the second sequence, the Soft Inform ation is the input letter for inputting decoder during blind examination
Number, the DCI0 signal that the blind examination goes out is the output signal of the decoder during blind examination；
Judgment module, for judging whether the First ray and second sequence are identical, if it is, determining the blind examination
DCI0 signal out is non-empty inspection signal；
The judgment module is used to judge whether the First ray is identical as second sequence
The judgment module is specifically used for, and the First ray and second sequence are carried out XOR operation, obtain third sequence
Column, if the element in the third sequence is zero, it is determined that the First ray is identical as second sequence, otherwise,
Determine that the First ray and second sequence be not identical；
The judgment module is also used to:
If the First ray and second sequence be not identical, by all elements being not zero in the third sequence
Position reorder, obtain the 4th sequence；
M element is selected from the 4th sequence, the M is the integer greater than zero；
Each of M element element is handled as follows according to sequence of positions respectively: using the value of this element as position-order
Number, the corresponding element of the position number is taken out from the Soft Inform ation, and soft-decision is carried out to the element of taking-up, uses soft-decision
Result substitute original value of the element of the taking-up in the Soft Inform ation, obtain the 5th sequence, by the 5th sequence into
Row retranslates code；
If the DCI0 signal that the result and the blind examination of retranslating code for M times go out is all the same, it is determined that the DCI0 letter that the blind examination goes out
It number is true DCI0 signal, otherwise, it determines the DCI0 signal that the blind examination goes out is empty inspection signal.
5. device according to claim 4, which is characterized in that the judgment module is used to carry out the third sequence weight
Sequence includes:
The judgment module is specifically used for, according to rule:
To third sequenceli< li+1
It reorders, whereinIndicate that downward rounding operation, n indicate the position of all elements being not zero in the third sequence
Number.
6. device according to claim 4 or 5, which is characterized in that the judgment module is used to soft sentence by this element
Certainly include:
The judgment module is specifically used for, and is 0 by the value judgement of this element when the value of this element is greater than or equal to 4, otherwise,
It is 7 by the value judgement of this element.
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