CN108075862A - The method and apparatus that ACK/NACK is detected on a kind of Physical Uplink Shared Channel - Google Patents
The method and apparatus that ACK/NACK is detected on a kind of Physical Uplink Shared Channel Download PDFInfo
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- CN108075862A CN108075862A CN201611008292.9A CN201611008292A CN108075862A CN 108075862 A CN108075862 A CN 108075862A CN 201611008292 A CN201611008292 A CN 201611008292A CN 108075862 A CN108075862 A CN 108075862A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03312—Arrangements specific to the provision of output signals
- H04L25/03318—Provision of soft decisions
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The embodiment of the invention discloses on a kind of PUSCH ACK/NACK detect method, the described method includes：Obtain confirmation/corresponding bit soft information of non-acknowledgement ACK/NACK information on PUSCH；According to all bits in the bit soft information and square in the bit soft information all bits square and, obtain the detected value of the ACK/NACK information；Alternatively, be modified to the bit soft information, according to all bits in revised bit soft information and square in the bit soft information all bits square and, obtain the detected value of the ACK/NACK information；When the detected value of the ACK/NACK information is more than default threshold value, determine that there are ACK/NACK information on the PUSCH.The embodiment of the invention also discloses the devices that ACK/NACK on a kind of PUSCH is detected.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of Physical Uplink Shared Channel (Physical Uplink
Shared Channel, PUSCH) on confirmation/non-acknowledgement (Acknowledgement/Negative Acknowledgement,
ACK/NACK) the method and apparatus of detection.
Background technology
In order to adapt to future mobile communication system high-speed and high reliability data transmission and meet new business demand,
Third generation partner program (3GPP, Third Generation Partnership Projects) is numerous big both at home and abroad
In 2004 by mobile communication system land radio access web (Universal Mobile under the promotion of type operator
Telecommunications System Terrestrial Radio Access Network, UTRAN) Long Term Evolution
(Long Term Evolution, LTE) plan official approval project verification.Report of feasibility, in June, 2007 are completed in June, 2006
Complete Main Specification.The LTE projects of 3GPP are on general land wireless access (Universal Terrestrial Radio
Access, UTRA) and the improved projects of UTRAN, it is the technological evolvement to the whole network including core net.The downlink in LTE
Multi-access mode for Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access,
OFDMA), the multi-access mode of uplink is based on Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division
Multiplexing, OFDM) transmission technology single-carrier frequency division multiple access (Single-carrier Frequency-Division
Multiple Access, SC-FDMA) mode.
In mobile radio system, since channel circumstance is poor, transmission data are present with mistake, generally use mistake
Control technology ensures the service quality in physical link.LTE system employs mixed automatic retransfer technology (Hybrid
Automatic Repeat Request, HARQ), this be a kind of forward error correction coding (Forward Error Correction,
) and automatic repeat request (Automatic Repeat reQuest, the ARQ) technology that is combined and is formed FEC.Business information with
Code word is added cyclic redundancy check (Cyclic Redundancy Check, CRC) for unit and is encoded, the base in downlink transfer
It stands and is sent by Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) to terminal.Terminal
After the downlink data for receiving PDSCH, learn whether the code word is properly received by the CRC check result of complete code.If CRC
The correct then terminal of verification, which need to be made, confirms that ACK receives feedback, and otherwise terminal carries out non-acknowledgement NACK and receives feedback.When base station receives
When being fed back to this, so that it may which, according to ACK/NACK to determine whether needing to retransmit, such mechanism causes the throughput of channel to obtain
It improves.HARQ technologies can compensate well for the influence of wireless mobile channel time-varying and multipath fading to signal transmission,
As one of key technology indispensable in following 3G long evolving systems.The technology will be with 3G long evolving systems
Develop constantly improve.
Terminal receives the business datum sent base station, it is necessary to be confirmed to these data and feed back to base station end.
ACK/NACK feedback informations can be multiplexed with business datum or individually transmit when being transmitted on PUSCH.It mainly begs for below
By the situation of ACK/NACK feedback informations and PUSCH data-reusings.Terminal carries out CRC check to the code word received first and determines instead
Bit sequence is presented, ACK/NACK feedback informations have different coding modes according to bit number, as 5.2.2.6 is saved in 36.212 agreements
It is described.Encoded feedback information generates final transmission bit sequence by circulating repetition connection, is multiplexed after modulation
It is sent on PUSCH.The multiplexing of ACK/NACK feedback informations is realized by being punched to business datum, that is to say, that according to
Method described by 5.2.2.8 sections replaces the business datum ACK/NACK information of specific position in 36.212 agreements, so does
Purpose be ensure receiving terminal rate-matched can be solved correctly to business datum.Base station receives the PUSCH information of terminal transmission,
After demultiplexing ACK/NACK bits are obtained through ACK/NACK decoder for decoding.If receive ACK represent that the code word receives correctly can be with
New codeword data is sent, if receiving NACK represents that the code word receives mistake and needs to retransmit.This multiplex mode, which improves, to be gulped down
Spit rate, while can bring a problem.What is carried on PUSCH is the corresponding ACK/NACK feedback informations of PDSCH, such as in son
Also uplink authorization information (UL grant) has been sent out while frame n has sent out PDSCH, if terminal had not only had received PDSCH but also received
UL grant are arrived, terminal can send PUSCH in subframe n+4, and the corresponding ACK/NACK feedback informations of PDSCH are passed through multiplexing
In carrying.It is, however, possible to terminal has only received UL grant without receiving PDSCH, so as to which terminal can only send out PUSCH,
In do not carry ACK/NACK feedback informations.So base station is not aware that in PUSCH whether be multiplexed ACK/NACK information.Assuming that eventually
End is not multiplexed ACK/NACK information on PUSCH, only has sent business datum, is referred to as discontinuous send
(Discontinuous Transmission, DTX), but base station receiving terminal is but thought to have received ACK/NACK information, this
Kind mistake is referred to as false retrieval；Conversely, when terminal has sent ACK/NACK information on PUSCH, base station receiving terminal does not detect but
To situation be referred to as missing inspection.The generation of mistake can't be caused during missing inspection, false retrieval may cause mistake to occur.For example, missing inspection
When, base station thinks that terminal is not received by the data on PDSCH, can be retransmitted, and re-transmission can't trigger mistake but can reduce
Handling capacity.During false retrieval, terminal is not received by the data message on PDSCH, also without the ACK/NACK information of raw paired data,
But due to false retrieval, base station obtains not existing ACK/NACK information from PUSCH, if decoding obtains nack message, at this time
True form word still can be retransmitted, and be not in gross error, but when decoding obtain be ACK information when, true form is thought in base station
Word receives correct and sends next new code word, and in fact the code word so may result in code there is no being received by terminal
The loss of digital data.
Therefore, ACK/NACK decoders are not only needed in base station receiving terminal, it is also necessary to increase an ACK/ after decoding
NACK detection devices, with judge the obtained ACK/NACK information of decoding whether necessary being.It is existing in the detection side based on thresholding
In method, when maximum likelihood value or correlation are less than thresholding, it is believed that no ACK/NACK information is sent, otherwise it is assumed that having sent ACK/
Nack message.But due to the influence of noise and multipath fading to signal amplitude so that the selection of threshold value needs higher standard
Probability could be met performance requirement simultaneously, that is to say, that be not by exactness ensureing ACK/NACK information false dismissal probability and mistake
Determine that suitable threshold value is relatively difficult in the channel circumstance of disconnected variation.
The content of the invention
In order to solve the above technical problems, an embodiment of the present invention is intended to provide the methods that ACK/NACK on a kind of PUSCH is detected
And device, the selection of threshold value and the false dismissal probability of ACK/NACK and probability of failure can be simplified.
The technical proposal of the invention is realized in this way：
An embodiment of the present invention provides on a kind of PUSCH ACK/NACK detect method, including：
Obtain the corresponding bit soft information of ACK/NACK information on PUSCH；
According to all bits in the bit soft information and square with all bits square in the bit soft information
With obtain the detected value of the ACK/NACK information；
Alternatively, be modified to the bit soft information, according in revised bit soft information all bit sums it is flat
It is square with the bit soft information in all bits square and, obtain the detected value of the ACK/NACK information；
When the detected value of the ACK/NACK information is more than default threshold value, determine that there are ACK/ on the PUSCH
Nack message.
In said program, it is described according to all bits in the bit soft information and square with the bit soft information in
The sum of all bits square, obtaining the detected value of the ACK/NACK information includes：When the ACK/NACK information is 1bit, meter
Calculate all bits in the bit soft information and square in the bit soft information all bits square and the ratio between, obtain
The detected value of the ACK/NACK information.
In said program, on PUSCH is obtained after the corresponding bit soft information of ACK/NACK information, the method is also wrapped
It includes：When the ACK/NACK information is 1bit, the bit soft information is grouped, is obtained：First bit soft information sequence
With the second bit soft information sequence；
Correspondingly, all bit sums square are in the bit soft information sequence：The first bit soft information sequence
With square of all bit sums in the second bit soft information sequence；All bits square in the bit soft information sequence
With for：The first bit soft information sequence and second bit soft information need the sum of all bits square in sequence.
It is described that the bit soft information is modified in said program, own according in revised bit soft information
Bit and square in the bit soft information all bits square and, obtain the detected value bag of the ACK/NACK information
It includes：When the ACK/NACK information is 2bit, the bit soft information is modified, is calculated in revised bit soft information
All bits and square in the bit soft information all bits square and the ratio between, obtain the ACK/NACK information
Detected value.
In said program, on PUSCH is obtained after the corresponding bit soft information of ACK/NACK information, the method is also wrapped
It includes：When the ACK/NACK information is 2bit, the bit soft information is grouped, is obtained：3rd bit soft information sequence,
4th bit soft information sequence and the 5th bit soft information sequence；
Correspondingly, the bit soft information is modified including：To the 3rd bit soft information sequence, the 4th bit
Soft Inform ation sequence and the 5th bit soft information sequence into row decoding and map, and obtain corresponding 3rd amendment value coefficient, the 4th repair
Positive value coefficient and the 5th corrects value coefficient；To being multiplied by the described 3rd after all bit summations in the 3rd bit soft information sequence
It corrects value coefficient and obtains the 3rd correction value, to being multiplied by the described 4th after all bit summations in the 4th bit soft information sequence
It corrects value coefficient and obtains the 4th correction value, to being multiplied by the described 5th after all bit summations in the 5th bit soft information sequence
It corrects value coefficient and obtains the 5th correction value；
Correspondingly, all bit sums square are in the revised bit soft information：It is 3rd correction value, described
Square of the sum of 4th correction value and the 5th correction value；In the bit soft information all bits square and be：Institute
State all bits in the 3rd bit soft information sequence, the 4th bit soft information sequence and the 5th bit soft information sequence
Square sum.
In said program, after the detected value of the ACK/NACK information is obtained, the method further includes：The ACK/
When the detected value of nack message is less than or equal to default threshold value, determine that ACK/NACK information is not present on the PUSCH.
The embodiment of the present invention additionally provides the device that ACK/NACK is detected on a kind of PUSCH, including：Acquisition module, calculating
Module and determining module；Wherein,
Acquisition module, for obtaining the corresponding bit soft information of ACK/NACK information on PUSCH；
Computing module, for according to all bits in the bit soft information and square with the bit soft information in institute
There is the sum of bit square, obtain the detected value of the ACK/NACK information；Alternatively, for being repaiied to the bit soft information
Just, according to all bits in revised bit soft information and square with all bits square in the bit soft information
With obtain the detected value of the ACK/NACK information；
Determining module, for when the detected value of the ACK/NACK information is more than default threshold value, determining described
There are ACK/NACK information on PUSCH.
In said program, the computing module, specifically for when the ACK/NACK information is 1bit, calculating the ratio
In special Soft Inform ation all bits and square in the bit soft information all bits square and the ratio between, obtain the ACK/
The detected value of nack message.
In said program, the computing module, specifically for the ACK/NACK information be 2bit when, to the bit
Soft Inform ation is modified, calculate all bits in revised bit soft information and square with owning in the bit soft information
Bit square and the ratio between, obtain the detected value of the ACK/NACK information.
In said program, the determining module, the detected value being additionally operable in the ACK/NACK information is less than or equal to default
Threshold value when, determine on the PUSCH be not present ACK/NACK information.
The method and apparatus that ACK/NACK is detected on a kind of PUSCH provided in an embodiment of the present invention obtain ACK/ on PUSCH
The corresponding bit soft information of nack message；According to all bits in the bit soft information and square with the bit soft information
In all bits square sum, obtain the detected value of the ACK/NACK information；Alternatively, the bit soft information is repaiied
Just, according to all bits in revised bit soft information and square with all bits square in the bit soft information
With obtain the detected value of the ACK/NACK information；When the detected value of the ACK/NACK information is more than default threshold value, really
There are ACK/NACK information on the fixed PUSCH.In this way, the selection of threshold value and ACK/NACK information can be simplified
False dismissal probability and probability of failure.
Description of the drawings
Fig. 1 is a schematic diagram of wireless communication system in the embodiment of the present invention；
Fig. 2 be in the embodiment of the present invention under normal cyclic prefix on PUSCH ACK/NACK multiplex modes schematic diagram；
Fig. 3 is the flow chart of the first embodiment of the method for ACK/NACK detections on PUSCH of the present invention；
Fig. 4 is the schematic diagram of ACK/NACK infomation detection structures in the embodiment of the present invention；
Fig. 5 is the flow chart of the second embodiment of the method for ACK/NACK detections on PUSCH of the present invention；
Fig. 6 is the composition structure diagram of the device of ACK/NACK detections on PUSCH of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes.
Fig. 1 is a schematic diagram of wireless communication system in the embodiment of the present invention, as shown in Figure 1, base station is received from terminal
Data.If terminal detects the data on PDSCH, which is verified and makes feedback.ACK/NACK feedback informations
It is multiplexed together with data on PUSCH and is sent to base station.If terminal does not detect the data on PDSCH, PUSCH is only sent out
Data are sent, do not have ACK/NACK information multiplexings.ACK/NACK information is used to indicate code word re-transmission, and ACK is representing the data received just
It need not really retransmit, NACK represents the error in data request retransmission received, and DTX expressions do not detect that data message retransmits and ask
It asks.True form word can all retransmit in the case of NACK and DTX information are received in base station, but NACK and DTX repeat requests is superfluous
Remaining version number might not be identical.Therefore, in base station receiving terminal need clearly (whether be with the presence or absence of ACK/NACK information
) and correct decoding ACK/NACK information DTX.The embodiment of the present invention detects whether that there are ACK/NACK for base station receiving terminal
Information proposes a kind of new detection method, and this method can reduce shadow of the disturbing factors such as noise to ACK/NACK detection performances
It rings.
Fig. 2 is the schematic diagram of ACK/NACK multiplex modes on PUSCH under normal cyclic prefix in the embodiment of the present invention, is such as schemed
Shown in 2, multiplex modes of the ACK/NACK with data on PUSCH is under normal cyclic prefix (Cyclic Prefix, CP)：
ACK/NACK information is multiplexed by punctured data information, that is to say, that when there is the transmission of ACK/NACK information, in Fig. 2
The service data information for being multiplexed location resource is replaced with ACK/NACK information；If without ACK/NACK information, business number is only sent
According to.According to 5.2.2.8 sections requirement in 36.212 agreements in 3GPP, believe from the resource impact it can be seen from the figure that ACK/NACK of Fig. 2
Breath is distributed in the both sides of demodulated reference signal (Demodulation reference signal, DMRS), can so ensure
The parameters such as the channel estimation of ACK/NACK information position are more correct, so as to preferably decode ACK/NACK information.
First embodiment
Fig. 3 is the flow chart of the first embodiment of the method for ACK/NACK detections on PUSCH of the present invention, as shown in figure 3, should
Method includes：
Step 300：Obtain the corresponding bit soft information of ACK/NACK information on PUSCH.
In actual implementation, HARQ-ACK coding modes when ACK/NACK information is 1bit and 2bit are respectively such as 1 He of table
Shown in table 2：
Coding mode when 1 ACK/NACK information of table is 1bit
Wherein,For ACK/NACK information bits, " x " and " y " is placeholder, for adding to HARQ-ACK bits
It disturbs, without practical significance, after carrying out scrambling processing to y placeholders, y is in obtained new bit sequenceRepetition.
Coding mode when 2 ACK/NACK information of table is 2bit
Wherein, For ACK/NACK information bits," x " is occupy-place
Symbol, for being scrambled to HARQ-ACK bits, so that the Euclidean distance of the modulation symbol of carrying HARQ-ACK information reaches most
Greatly, without practical significance.
In Tables 1 and 2, QmRepresent ACK/NACK modulates information exponent numbers, QmValue is 2,4,6, i.e., support QPSK respectively,
16QAM, 64QAM modulation system.
Here it is possible to ACK/NACK transmission bit numbers are expressed as QACK, QACK=Q ' × Qm, wherein, Q ' expressions ACK/
The symbolic number of nack message is determined by factors such as the bit number of ACK/NACK information, the occupied bandwidth of PUSCH channel blocks
It is fixed.
After obtaining ACK/NACK and sending bit, bit will be sent and connected by coded bit circulating repetition, obtain weight
Structure bit sequence.
In this step, the corresponding bit soft information sequence of ACK/NACK information on PUSCH is obtained, can also be included：It obtains
Modulation symbol data on PUSCH demultiplexes the modulation symbol data on the PUSCH, demapping, is drawn successively
Confirmation/corresponding bit soft information of non-acknowledgement ACK/NACK information on PUSCH.
Illustratively, if there are ACK/NACK information multiplexings on PUSCH channels, demultiplexed according to multiplex mode shown in Fig. 2
With obtaining the symbol sebolic addressing s of ACK/NACK information1,...,sQ′, Q ' is symbol numbers；If ACK/ is not present on PUSCH channels
Nack message is multiplexed, then by demultiplexing obtained symbol sebolic addressing as ACK/NACK information multiplexings position on current PUSCH channels
Locate the business datum preserved.
Further, the modulation coding scheme according to ACK/NACK information is to symbol sebolic addressing s1,...,sQ′Demapping, Xie Ying
Corresponding bit soft information is obtained after penetrating is：
It should be noted that during to the symbol sebolic addressing demapping of ACK/NACK information, no matter what ACK/NACK information uses
Kind of modulation system, when carrying out ACK/NACK infomation detections (DTX detections) the preceding dibit Soft Inform ation of each symbol is only needed to join
With calculating.Therefore, no matter ACK/NACK information using which kind of modulation system, can be solved using following de-mapping method
Mapping is handled, and the demapping formula of each ACK/NACK symbols can be expressed as：
It is understood that it is by the bit soft information that above-mentioned demapping formula can finally be needed：WhereinRepresent i-th of symbol siThe first bit soft information,It represents i-th
Symbol siThe second bit soft information, the Soft Inform ation of other bits is not involved in DTX detection calculations therefore is not considered.
Further, obtained bit soft information is grouped according to original bit position, ACK/NACK information is
During 1bit, the bit soft information is grouped, is obtained：First bit soft information sequence and the second bit soft information sequence.
Illustratively, when ACK/NACK information is 1bit, coding mode when order of modulation is 2 in foundation table 1 obtains
Original information bits beIt is Q ' that ACK/NACK, which sends symbolic number,.Due to there was only the first two bit in each symbol
Soft Inform ation participates in computing, therefore, is by bit soft information is obtained after original information bits demapping：o′1,y′1,o′2,y
′2,...,o′Q′,y′Q′。
Soft Inform ation sequence is grouped to obtain by above-mentioned bit according to original bit position, original information bitsIt is right
The the first bit soft information sequence answered is：o′1,o′2,...,o′Q′, the corresponding second bit bit soft information sequences of y are：y′1,
y′2,...,y′Q′, the length of bit soft information sequence is Q '.
When ACK/NACK information is 2bit, the bit soft information is grouped, is obtained：3rd bit soft information sequence
Row, the 4th bit soft information sequence and the 5th bit soft information sequence.
When ACK/NACK information bits are 2bit, coding mode when order of modulation is 2 in foundation table 2, obtained original
Beginning information bit isIt is to obtaining Soft Inform ation sequence after original bit information demapping：o′01,o1′1,
o′21,o′02,o1′2,o′22,...,o′0t1,o1′t2,o′2t3, wherein t1, t2, t3 represents that the sequence of three bit soft informations is long respectively
Degree.Bit soft information is grouped to obtain according to original bit position, original information bitsIt is corresponding soft
Information sequence is respectively：3rd bit soft information sequence o '01,o′02,...,o′0t1, the 4th bit soft information sequence o '11,o
′12,...,o′1t2, the 5th bit soft information sequence o '21,o′22,...,o′2t3.Here, according to ACK/NACK information be 2bit when
Encoding characteristics, the length of each bit soft information sequence may be different, but length difference is only 1.
For example, when it is 4 that ACK/NACK information, which is 2bit symbolic numbers Q ', bit will be obtained after original information bits demapping
Soft Inform ation is：o′01,o′11,o′21,o′02,o′12,o′22,o′03,o′13, here, 1 symbol can go out the soft of 2bit with demapping
Information.After Soft Inform ation sequence is grouped according to original bit position, original information bitsIt is corresponding soft
Information is respectively：o′01,o′02,o′03、o′11,o′12,o′13、o′21,o′22, here three bit soft informations sequence length difference
For：T1=3, t2=3, t3=2.It can be seen that t1, t2, t3 value are unequal, and difference is up to 1.
Step 301：According to all bits in the bit soft information and square with the bit soft information in all ratios
Special square of sum, obtains the detected value of the ACK/NACK information；Alternatively, be modified to the bit soft information, according to repairing
In bit soft information after just all bits and square in the bit soft information all bits square and, obtain described
The detected value of ACK/NACK information.
In actual implementation, according to the difference of ACK/NACK information bits, when calculating the detected value of ACK/NACK information
Including at least following two calculations：
Mode 1：When ACK/NACK information bits are 1bit, all bit sums square is in bit soft information sequence：The
Square of all bit sums in one bit soft information sequence and the second bit soft information sequence；All ratios in bit soft information sequence
Special square and be：First bit soft information sequence and the second bit soft information need the sum of all bits square in sequence.
Fig. 4 is the schematic diagram of ACK/NACK infomation detection structures in the embodiment of the present invention, is obtained in foundation Fig. 4 and step 300
The the first bit soft information sequence obtained：o′1,o′2,...,o′Q′, the corresponding second bit soft information sequences of y：y′1,y′2,...,
y′Q′, the detected value R of ACK/NACK information is calculated, calculation formula is as follows：
Then
Here, T1It is the threshold value of ACK/NACK detections when ACK/NACK information is 1bit, the threshold value is according to actual
PUSCH channel qualities and determine, that is to say, that when ACK/NACK information is 1bit, the T in Fig. 4 is T1.During DTX_flag=1
It represents in the data obtained at this time on PUSCH channels there are ACK/NACK information multiplexings, when DTX_flag=0 represents to be not present
, that is, there is DTX in ACK/NACK information multiplexings.
Mode 2：When ACK/NACK information is 2bit, it is necessary first to the bit soft information is modified, then calculated
In revised bit soft information all bits and square in the bit soft information all bits square and the ratio between, obtain
To the detected value of the ACK/NACK information.
Here, the bit soft information is modified to be：To the 3rd bit soft information sequence, the 4th bit
Soft Inform ation sequence and the 5th bit soft information sequence into row decoding and map, and obtain corresponding 3rd amendment value coefficient, the 4th repair
Positive value coefficient and the 5th corrects value coefficient；To being multiplied by the described 3rd after all bit summations in the 3rd bit soft information sequence
It corrects value coefficient and obtains the 3rd correction value, to being multiplied by the described 4th after all bit summations in the 4th bit soft information sequence
It corrects value coefficient and obtains the 4th correction value, to being multiplied by the described 5th after all bit summations in the 5th bit soft information sequence
It corrects value coefficient and obtains the 5th correction value.
Correspondingly, the sum of described revised bit soft information square is：3rd correction value, the described 4th correct
Square of the sum of value and the 5th correction value；In the bit soft information all bits square and be：3rd ratio
All bits square in special Soft Inform ation sequence, the 4th bit soft information sequence and the 5th bit soft information sequence
With.
Illustratively, the method that bit soft information is modified can be included：It willCorresponding soft letter
Breath is input to ACK/NACK decoders, and [o ' is obtained after decoding0o′1o′2] sequence, the method for decoding is as follows：
Wherein, i is the number of each bit in raw information；J is the corresponding volume of each Soft Inform ation in a bit
Number；T bit soft information sequence lengths.
By sequence [o '0o′1o′2] can be mapped as according to following formulasHereRespectively
Three correction factors, the 4th correction factor, the 5th correction factor.
Illustratively, original information bitsCorresponding Soft Inform ation is respectivelyBy Soft Inform ation
The sequence obtained after decoding is [o '0=0, o1'=1, o '2=1], correction factor is obtained after sequence is mapped is respectively：
According to the 3rd bit soft information sequence o ' obtained in Fig. 4 and step 30001,o′02,...,o′0t1, the 4th bit
Soft Inform ation sequence o '11,o′12,...,o′1t2, the 5th bit soft information sequence o '21,o′22,...,o′2t3And above-mentioned amendment system
Number.The detected value R of ACK/NACK information is calculated, calculation formula is as follows：
Here, T2It is the threshold value of ACK/NACK detections when ACK/NACK information is 2bit, the threshold value is according to actual
PUSCH channel qualities and determine.That is, when ACK/NACK information is 2bit, the T in Fig. 4 is T2.During DTX_flag=1
It represents in the data obtained at this time on PUSCH channels there are ACK/NACK information multiplexings, when DTX_flag=0 represents to be not present
, that is, there is DTX in ACK/NACK information multiplexings.
It should be noted that when ACK/NACK information is more than 2bit, terminate flow.
Step 302：When the detected value of ACK/NACK information is more than default threshold value, determine that there are ACK/ on PUSCH
Nack message.
In actual implementation, the detected value of the ACK/NACK information is less than or equal to default threshold value, on the PUSCH
There is no ACK/NACK information, that is, DTX occur.
It can be seen that from the calculation formula of above-mentioned A and B when being multiplexed ACK/NACK information on PUSCH, receiving terminal ACK/
The soft bit information that symbol demodulation obtains at nack message position has certain feature.When ACK/NACK information is 1bit, this
The preceding positive and negative jack per line of two soft bit informations that the symbol demodulation of a little positions obtains, then the square value A of bit sum will convergence one
Larger number.When ACK/NACK information is 2bit, three bit soft informations that the symbol demodulation of these positions obtains are summed respectively, warp
It crosses after being multiplied by the correction value of estimation bit, the positive and negative of each bit soft information also will be consistent, they similary bit sum is put down
Side value A also can one larger number of convergence.When on PUSCH without multiplexing ACK/NACK information, ACK/NACK information should
What the position of occupancy was but sent is business datum.Considering from bit-level, the bits of traffic data of these positions shows randomness,
That is, the bit soft information that the symbol demodulation of these positions is obtained have positive and negative randomness, then their bit and
Square value A can one smaller number of convergence.
Due to the square value A of bit sum and the difference with value B with larger multiple of bit square, on PUSCH
It is multiplexed the detected value R obtained during ACK/NACK information1, with the detection obtained when not having on PUSCH and being multiplexed ACK/NACK information
Value R2Difference with larger multiple, this has reserved very big space to be brought to antinoise and decline etc. to the selection of thresholding T
Influence so that threshold T ACK/NACK cannot can also be effectively detected when factors quick and precisely change with noise
Information whether there is, and ensure that the false dismissal probability and probability of failure of ACK/NACK information.
ACK/NACK detection methods provided in an embodiment of the present invention exactly take full advantage of bits of traffic data in ACK/
Randomness at nack message bit multiplexing position realizes the detection of ACK/NACK, and as bigger, the Ying Fa that sends symbol Q '
ACK/NACK information bits are more, then randomness is more apparent, and detection performance is better.
In the embodiment of the present invention, the corresponding bit soft information of ACK/NACK information on PUSCH is obtained；It is soft according to the bit
In information all bits and square in the bit soft information all bits square and, obtain the ACK/NACK information
Detected value；Alternatively, be modified to the bit soft information, according in revised bit soft information all bit sums it is flat
It is square with the bit soft information in all bits square and, obtain the detected value of the ACK/NACK information；The ACK/
When the detected value of nack message is more than default threshold value, determine that there are ACK/NACK information on the PUSCH.It in this way, can
Simplify the selection of threshold value, and can guarantee the false dismissal probability and probability of failure of ACK/NACK information.
Second embodiment
In order to more embody the purpose of the present invention, on the basis of first embodiment of the invention, further lifted
Example explanation.
Fig. 5 is the flow chart of the second embodiment of the method for ACK/NACK detections on PUSCH of the present invention, and this method includes：
Step 500：Data on PUSCH are handled to obtain modulation symbol data.
In actual implementation, terminal receive base station transmission business datum after, it is necessary to be confirmed simultaneously to these data
Base station is fed back to, ACK/NACK feedback informations can be with being sent to base station, base station receiving terminal after business datum multiplexing by PUSCH
After receiving data, a series of processing first is carried out to the data on PUSCH, including channel estimation, noise estimation, offset estimation
The operations such as compensation and equilibrium.The data on PUSCH can be converted into modulation symbol data after processing.
Step 501：Modulation symbol data is demultiplexed, obtains ACK/NACK symbol sebolic addressings.
Step 502：According to corresponding modulation system to the symbol sebolic addressing demapping of ACK/NACK information, corresponding ratio is obtained
Special Soft Inform ation.
In this step, by the symbol sebolic addressing s of obtained ACK/NACK information1,...,sQ′Corresponding ratio is obtained after demapping
Special Soft Inform ation is：Wherein QmRepresent order of modulation.
Step 503：Bit soft information is grouped according to original bit position.
Illustratively, when ACK/NACK information is 1bit, will be obtained after Soft Inform ation sequence of packets, bit soft information sequence point
It is not：o′1,o′2,...,o′Q′、y′1,y′2,...,y′Q′。
When ACK/NACK information is 2bit, it will be obtained after Soft Inform ation sequence of packets, bit soft information sequence is respectively：o′01,
o′02,...,o′0t1、o′11,o′12,...,o′1t2、o′21,o′22,...,o′2t3。
Step 504：The detected value of ACK/NACK information is calculated, judges whether ACK/NACK information.
In this step, include following two modes for the calculating of the detected value of ACK/NACK information：
Mode 1：When ACK/NACK information is 1bit in the ideal case, original information bits are utilizedIt is corresponding
Bit soft information carries out ACK/NACK infomation detections.
Since y isRepetition, so the corresponding second bit soft information sequences ies of y '1,y′2,...,y′Q′With
Corresponding first bit soft information sequence o '1,o′2,...,o′Q′It is identical, i.e. o 'i=y 'i=C, i=1,2 ..., Q '.At this time
The calculation formula of ACK/NACK infomation detection values can be：
Then detected value is：
At this point,
Mode 2：When ACK/NACK information is 2bit in the ideal case, original information bits are utilized
Corresponding bit soft information carries out ACK/NACK infomation detections.If Q ' is 3 multiple, thenCorresponding soft letter
It is all identical to cease sequence length, is 2Q '/3.And Soft Inform ation o '0i、o′1iWith o '2iValue it is also identical, i.e. o '0i=o '1i=o '2i
=D, i=1,2 ..., Q '.
Illustratively, when ACK/NACK symbolic numbers Q ' is 6, original information bitsCorresponding soft letter
Breath is respectively：o′01,o′02,o′03,o′04、o′11,o′12,o′13,o′14、o′21,o′22,o′23,o′24, three bit soft information at this time
Sequence length be 4.
In the ideal case, the calculation formula of ACK/NACK infomation detections value can be：
Then detected value is
Further, by the detected value of ACK/NACK information and the comparative result of threshold value, ACK/NACK information is set
The flag bit DTX_flag of detection.
At this point,
Represent that there are ACK/NACK information multiplexings, DTX_ in the data obtained on PUSCH channels at this time during DTX_flag=1
It is represented during flag=0 there is no ACK/NACK information multiplexings, that is, DTX occurs.
It is directly proportional to symbolic number Q ' that the result of calculation of analysis mode 1 and mode 2 can be seen that detected value R.It is deposited for example, setting
In ACK/NACK information, detected value is R1, it is R there is no detected value during ACK/NACK information2.Then when Q '=9 and there are ACK/
Nack message, then detected value R when ACK/NACK information is 1bit and 2bit1Theoretical value be 18；If there is no ACK/NACK
B values are basically unchanged during information, A values because bits of traffic data show stronger randomness make value maintain one it is smaller
Scope, then detected value R2Also it is smaller.Detected value R at this time2Detected value R can be far smaller than1.As long as so select suitable thresholding T
(R2≤T≤R1), with regard to that can effectively detect with the presence or absence of ACK/NACK information.T is closer to R1Probability of failure is smaller, and missing inspection is general
Rate is bigger；T is closer to R2False dismissal probability is smaller, and probability of failure is bigger.
When interchannel noise is smaller, and transmission symbolic number Q ' is larger, larger thresholding T is selected, on the contrary the smaller thresholding of selection
T.In short, the ACK/NACK detection methods provided in the embodiment of the present invention cause the ACK/NACK detected values R compared for thresholding
It substantially increases, accordingly even when PUSCH variations comparatively fast cause the selection of thresholding T inaccurate, ACK/ will not be reduced
The detection performance of NACK, therefore, the ACK/NACK detection methods provided in the embodiment of the present invention enhance the detection of ACK/NACK
Performance improves anti-interference.
3rd embodiment
For the method for the embodiment of the present invention, the embodiment of the present invention additionally provides what ACK/NACK on a kind of PUSCH was detected
Device, Fig. 6 is the composition structure diagram of the device of ACK/NACK detections on PUSCH of the embodiment of the present invention, as shown in fig. 6, should
Device includes：Acquisition module 600, computing module 601 and determining module 602；Wherein,
Acquisition module 600, for obtaining the corresponding bit soft information of ACK/NACK information on PUSCH.
Computing module 601, for according to all bits in bit soft information and square with bit soft information in all ratios
Special square of sum, obtains the detected value of ACK/NACK information；Alternatively, for being modified to bit soft information, after amendment
Bit soft information in all bits and square in bit soft information all bits square and, obtain ACK/NACK information
Detected value.
Determining module 602, for when the detected value of ACK/NACK information is more than default threshold value, determining described
There are ACK/NACK information on PUSCH..
Computing module 601, specifically for ACK/NACK information be 1bit when, calculate bit soft information in all bits and
Square in bit soft information all bits square and the ratio between, obtain the detected value of ACK/NACK information.
Preferably, computing module 601 are additionally operable to be grouped bit soft information, obtain：First bit soft information sequence
With the second bit soft information sequence；Correspondingly, all bit sums square are in bit soft information sequence：First bit soft information
Square of all bit sums in sequence and the second bit soft information sequence；The sum of all bits square in bit soft information sequence
For：First bit soft information sequence and the second bit soft information need the sum of all bits square in sequence.
Computing module 601 specifically when being 2bit for ACK/NACK information, is modified bit soft information, calculates
In revised bit soft information all bits and square in bit soft information all bits square and the ratio between, obtain
The detected value of ACK/NACK information.
Preferably, computing module 601 are additionally operable to be grouped bit soft information, obtain：3rd bit soft information sequence
Row, the 4th bit soft information sequence and the 5th bit soft information sequence；
Correspondingly, bit soft information is modified including：To the 3rd bit soft information sequence, the 4th bit soft information sequence
Row and the 5th bit soft information sequence into row decoding and map, and obtain the corresponding 3rd and correct value coefficient, the 4th amendment value coefficient
Value coefficient is corrected with the 5th；The is obtained to being multiplied by the 3rd amendment value coefficient after all bits summation in the 3rd bit soft information sequence
Three correction values obtain the 4th amendment to being multiplied by the 4th amendment value coefficient after all bit summations in the 4th bit soft information sequence
Value obtains the 5th correction value to being multiplied by the 5th amendment value coefficient after all bit summations in the 5th bit soft information sequence；
Correspondingly, all bit sums square are in revised bit soft information：3rd correction value, the 4th correction value,
And the 5th correction value sum square；In bit soft information all bits square and be：3rd bit soft information sequence,
The sum of all bits square in four bit soft information sequences and the 5th bit soft information sequence.
Determining module 602 is additionally operable to, when the detected value of ACK/NACK information is less than or equal to default threshold value, determine
ACK/NACK information is not present on PUSCH.
In practical applications, acquisition module 600, computing module 601 and determining module 602 can be by being located in terminal device
Central processing unit (Central Processing Unit, CPU), microprocessor (Micro Processor Unit, MPU),
Digital signal processor (Digital Signal Processor, DSP) or field programmable gate array (Field
Programmable Gate Array, FPGA) etc. realizations.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the shape of the embodiment in terms of hardware embodiment, software implementation or combination software and hardware can be used in the present invention
Formula.Moreover, the present invention can be used can use storage in one or more computers for wherein including computer usable program code
The form for the computer program product that medium is implemented on (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (10)
1. a kind of method of confirmation/non-acknowledgement ACK/NACK detections on Physical Uplink Shared Channel PUSCH, which is characterized in that institute
The method of stating includes：
Obtain the corresponding bit soft information of ACK/NACK information on PUSCH；
According to all bits in the bit soft information and square in the bit soft information all bits square and, obtain
To the detected value of the ACK/NACK information；
Alternatively, be modified to the bit soft information, according to all bits in revised bit soft information and square with
The sum of all bits square in the bit soft information obtains the detected value of the ACK/NACK information；
When the detected value of the ACK/NACK information is more than default threshold value, determine that there are ACK/NACK letters on the PUSCH
Breath.
It is 2. according to the method described in claim 1, it is characterized in that, described according to all bit sums in the bit soft information
Square in the bit soft information all bits square and, obtaining the detected value of the ACK/NACK information includes：It is described
When ACK/NACK information is 1bit, calculate all bits in the bit soft information and square with institute in the bit soft information
Have bit square and the ratio between, obtain the detected value of the ACK/NACK information.
3. according to the method described in claim 2, it is characterized in that, obtain PUSCH on the corresponding bit of ACK/NACK information
After Soft Inform ation, the method further includes：When the ACK/NACK information is 1bit, the bit soft information is grouped, is obtained
It arrives：First bit soft information sequence and the second bit soft information sequence；
Correspondingly, all bit sums square are in the bit soft information sequence：The first bit soft information sequence and institute
State square of all bit sums in the second bit soft information sequence；The sum of all bits square in the bit soft information sequence
For：The first bit soft information sequence and second bit soft information need the sum of all bits square in sequence.
4. according to the method described in claim 1, it is characterized in that, described be modified the bit soft information, according to repairing
In bit soft information after just all bits and square in the bit soft information all bits square and, obtain described
The detected value of ACK/NACK information includes：When the ACK/NACK information is 2bit, the bit soft information is modified, is counted
Calculate all bits in revised bit soft information and square in the bit soft information all bits square and the ratio between,
Obtain the detected value of the ACK/NACK information.
5. according to the method described in claim 4, it is characterized in that, obtain PUSCH on the corresponding bit of ACK/NACK information
After Soft Inform ation, the method further includes：When the ACK/NACK information is 2bit, the bit soft information is grouped, is obtained
It arrives：3rd bit soft information sequence, the 4th bit soft information sequence and the 5th bit soft information sequence；
Correspondingly, the bit soft information is modified including：To the 3rd bit soft information sequence, the 4th soft letter of bit
Breath sequence and the 5th bit soft information sequence into row decoding and map, and obtain the corresponding 3rd and correct value coefficient, the 4th correction value
Coefficient and the 5th corrects value coefficient；It is corrected to being multiplied by the described 3rd after all bit summations in the 3rd bit soft information sequence
Value coefficient obtains the 3rd correction value, is corrected to being multiplied by the described 4th after all bit summations in the 4th bit soft information sequence
Value coefficient obtains the 4th correction value, is corrected to being multiplied by the described 5th after all bit summations in the 5th bit soft information sequence
Value coefficient obtains the 5th correction value；
Correspondingly, all bit sums square are in the revised bit soft information：3rd correction value, the described 4th
Square of the sum of correction value and the 5th correction value；In the bit soft information all bits square and be：Described
All bits square in three bit soft information sequences, the 4th bit soft information sequence and the 5th bit soft information sequence
Sum.
6. according to the method described in claim 1, it is characterized in that, after the detected value of the ACK/NACK information is obtained,
The method further includes：When the detected value of the ACK/NACK information is less than or equal to default threshold value, determine on the PUSCH
There is no ACK/NACK information.
A kind of 7. device of confirmation/non-acknowledgement ACK/NACK detections on Physical Uplink Shared Channel PUSCH, which is characterized in that institute
Stating device includes：Acquisition module, computing module and determining module；Wherein,
Acquisition module, for obtaining the corresponding bit soft information of ACK/NACK information on PUSCH；
Computing module, for according to all bits in the bit soft information and square with the bit soft information in all ratios
Special square of sum, obtains the detected value of the ACK/NACK information；Alternatively, for being modified to the bit soft information, root
According to all bits in revised bit soft information and square in the bit soft information all bits square and, obtain
The detected value of the ACK/NACK information；
Determining module, for when the detected value of the ACK/NACK information is more than default threshold value, determining on the PUSCH
There are ACK/NACK information.
8. device according to claim 7, which is characterized in that the computing module, specifically in the ACK/NACK
When information is 1bit, calculate all bits in the bit soft information and square put down with all bits in the bit soft information
Side and the ratio between, obtain the detected value of the ACK/NACK information.
9. device according to claim 7, which is characterized in that the computing module, specifically in the ACK/NACK
When information is 2bit, the bit soft information is modified, calculates the flat of all bit sums in revised bit soft information
It is square with the bit soft information in all bits square and the ratio between, obtain the detected value of the ACK/NACK information.
10. device according to claim 7, which is characterized in that the determining module is additionally operable to believe in the ACK/NACK
When the detected value of breath is less than or equal to default threshold value, determine that ACK/NACK information is not present on the PUSCH.
Priority Applications (2)
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| CN201611008292.9A CN108075862A (en) | 2016-11-16 | 2016-11-16 | The method and apparatus that ACK/NACK is detected on a kind of Physical Uplink Shared Channel |
| PCT/CN2017/082294 WO2018090571A1 (en) | 2016-11-16 | 2017-04-27 | Acknowledgement/negative acknowledgement information detection method, apparatus and storage medium |
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| CN201611008292.9A CN108075862A (en) | 2016-11-16 | 2016-11-16 | The method and apparatus that ACK/NACK is detected on a kind of Physical Uplink Shared Channel |
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| CN114285703A (en) * | 2022-03-03 | 2022-04-05 | 广州慧睿思通科技股份有限公司 | Method, chip, device and storage medium for estimating physical uplink shared channel |
| CN114650122A (en) * | 2022-05-18 | 2022-06-21 | 成都爱瑞无线科技有限公司 | Physical uplink shared channel discontinuous transmission detection method, device and storage medium |
| CN114710973A (en) * | 2021-01-05 | 2022-07-05 | 香港应用科技研究院有限公司 | Method and device for detecting partial discontinuous transmission by using soft bit correlation |
| WO2022147851A1 (en) * | 2021-01-05 | 2022-07-14 | Hong Kong Applied Science and Technology Research Institute Company Limited | A method and device for detecting partial discontinuous transmission (dtx) using soft bits correlation |
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| US20230276524A1 (en) * | 2022-02-25 | 2023-08-31 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | Method and Device for Detecting Partial Discontinuous Transmission (DTX) Using Bits Reconstruction |
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| WO2018090571A1 (en) | 2018-05-24 |
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Application publication date: 20180525 |