CN105847199B - The method and device of PUSCH Channel Detection ACK/NACK state - Google Patents
The method and device of PUSCH Channel Detection ACK/NACK state Download PDFInfo
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Classifications
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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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- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
Abstract
The invention discloses a kind of method and devices of ACK/NACK state-detection on PUSCH channel, the described method includes: after ACK/NACK decoding terminates, determined whether to carry out DTX state detection according to ACK/NACK information bit, if carrying out DTX state detection, then the ACK/NACK bit sequence that base station decodes is reconstructed, obtain reconstruct bit sequence, bit sequence will be reconstructed again and demodulation soft bit sequence carries out operation, acquisition state decision value, and be compared decision value with pre-determined threshold, determine whether user terminal sends ack/nack signal.The present invention solves the technical issues of detection of DTX when how to effectively realize multi-code block multilayer transmission through the above technical solution.
Description
Technical field
This application involves fields of communication technology, specifically, being related to a kind of side of PUSCH Channel Detection ACK/NACK state
Method and device.
Background technique
Uplink only supports single antenna port to send in LTE (Long Term Evolution, long term evolution) R8 version, single
Code block single layer, PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) only have 1 TB, and 1 layer
Data.In the R10 version of LTE, since uplink supports MIMO and carrier aggregation technology, PUSCH that can support maximum 4 antenna ends
Mouthful, 2TB4 layers, 5 carrier component transmission, R10 version introduces HARQ-ACK multi-code block multilayer transmission technology compared to R8 version
And the ACK/NACK information bit number transmitted also increases to 20 bits from most 4 bits of R8 version.Therefore, HARQ-ACK
Processing there has also been biggish changes.
While in order to ensure providing more high data rate for user, guarantee the high reliability of communication, LTE (Long Term
Evolution, long term evolution)/LTE-A (LTE-Advanced) communication system introduces HARQ (Hybrid Automatic
Repeat Request, mixed automatic retransfer) technology.After user terminal receives the data of base station transmission, error detection will do it, if
Reception is correct, then sends ACK (Acknowledgement, confirmation) signal to base station, if reception is wrong and exceeds error correcting capability,
NACK (Negative Acknowledgement, non-acknowledgement) signal then is sent to base station, if user terminal there is no ACK/
NACK signal does not send any information, i.e. DTX (Discontinue Transmission, discontinuous transmission) then.
If base station receives ack signal, continues to send next data packet, if receiving NACK signal, retransmit
The data of last time transmission.Due to the introducing of DTX, base station needs to detect whether user terminal sends ack/nack signal.If occurring
ACK- > DTX (or NACK) erroneous judgement will cause the wasting of resources so that the data being properly received retransmit in this way, if occurring
DTX- > ACK erroneous judgement, base station will be considered that the data of transmission are correctly received, and be actually the feelings for being possible to occur mistake demodulation
Condition, but base station will not be retransmitted.
Summary of the invention
In view of this, present applicant proposes a kind of method of PUSCH Channel Detection ACK/NACK state, to solve how to have
Realize the technical issues of DTX when multi-code block multilayer transmission is detected in effect ground.In addition, also providing ACK/ on a kind of PUSCH channel
The device of NACK state-detection.
In order to achieve the above object, proposing following scheme:
A kind of method of PUSCH Channel Detection ACK/NACK state, comprising:
Step 1: determining whether to carry out DTX according to resulting ACK/NACK information bit after ACK/NACK decoding
Detection, if the bit number is less than or equal to predetermined bit threshold value, the ACK/NACK bit sequence obtained to base station demodulation coding
DTX state detection is done, is otherwise detected without DTX state；
Step 2: the ACK/NACK bit sequence that the base station demodulation coding obtains being reconstructed, reconstruct bit sequence is obtained
Column；
Step 3: the reconstruct bit sequence and demodulation soft bit sequence being subjected to operation, obtain DTX state decision value；
Step 4: the DTX state decision value being compared with pre-determined threshold, to adjudicate whether user terminal sends
Ack/nack signal.
To achieve the goals above, the application also provides a kind of device of ACK/NACK state-detection on PUSCH channel, should
Device includes:
Judgment module, for determining whether according to resulting ACK/NACK information bit after ACK/NACK decoding
DTX detection is carried out, if the bit number is less than or equal to predetermined bit threshold value, the ACK/NACK ratio obtained to base station demodulation coding
Special sequence does DTX state detection, otherwise detects without DTX state；
Reconstructed module, the ACK/NACK bit sequence for being obtained according to the decoding, obtains reconstruct bit sequence；
Decision value computing module, for calculating DTX state and sentencing according to the reconstruct bit sequence and demodulation soft bit sequence
Certainly it is worth；
State judging module, for being compared to the DTX state decision value with pre-determined threshold, to adjudicate user terminal
Whether ack/nack signal is sent.
The method and device of the PUSCH Channel Detection ACK/NACK state of the application, the ACK/ obtained according to demodulation coding
NACK bit sequence obtains reconstruct bit sequence, then calculates reconstruct bit sequence and demodulation soft bit sequence, obtains DTX
State decision value, finally compares DTX state decision value and pre-determined threshold size, and whether judgement user terminal sends ACK/NACK letter
Number.Have effectively achieved DTX detection ack/nack signal.When through the invention, having effectively achieved multi-code block multilayer transmission
DTX detection.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram of PUSCH Channel Detection ACK/NACK state provided by the embodiments of the present application；
Fig. 2 is a kind of apparatus structure schematic diagram of PUSCH Channel Detection ACK/NACK state provided by the embodiments of the present application.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in further detail.
Fig. 1 is a kind of method flow diagram of PUSCH Channel Detection ACK/NACK state provided by the embodiments of the present application.The party
Method may include:
Step 1: determining whether to carry out DTX according to resulting ACK/NACK information bit after ACK/NACK decoding
Detection, if the bit number is less than or equal to predetermined bit threshold value, the ACK/NACK bit sequence obtained to base station demodulation coding
DTX state detection is done, is otherwise detected without DTX state, ACK/NACK information bit is exported；
Step 2: the ACK/NACK bit sequence that the base station demodulation coding obtains being reconstructed, reconstruct bit sequence is obtained
Column；
Step 3: the reconstruct bit sequence and demodulation soft bit sequence being subjected to operation, obtain DTX state decision value；
Step 4: the DTX state decision value being compared with pre-determined threshold, to adjudicate whether user terminal sends
Ack/nack signal.
Base station needs the ACK/NACK bit sequence obtained to demodulation coding to do DTX detection.Terminate in ACK/NACK decoding
Later, determine whether to carry out DTX detection according to ACK/NACK information bit number.When ACK/NACK information bit number is greater than 3
When, it is smaller to there is DTX situation probability, thus step 1 determines whether to carry out the decision rule of DTX detection are as follows:
If ACK/NACK information bit number is less than or equal to 3, the ACK/NACK bit sequence obtained to base station demodulation coding
DTX detection is done, is otherwise detected without DTX.
According to agreement 3GPP TS 36.212, acquisition reconstruct bit sequence process includes channel coding and speed described in step 2
Rate matching, specific as follows:
By agreement it is found that ACK/NACK information bit number is different, the channel coding method taken is not also identical.Assuming that translating
The ACK/NACK bit sequence obtained after code indicates are as follows:
Wherein, OACKFor ACK/NACK information bit number.
If the ACK/NACK information bit number is 1, channel coding is as shown in table 1:
Table 1
Wherein,For ACK/NACK information bit.
If the ACK/NACK information bit number is 2, channel coding is as shown in table 2:
Table 2
Wherein,For ACK/NACK information bit,
If the ACK/NACK information bit number is 3, encoded using RM, obtains the channel coded sequence that length is 32
After channel coding, rate-matched is carried out by circulation value to coded sequence, by repeated encoding, so that coding
Sequence length afterwards is QACK.In particular, the acquisition of reconstruct bit sequence described in step 2 is multiple without the layer for carrying out solid size block
System.
Wherein QACKFor the ACK/NACK sequence length replicated without the layer for carrying out solid size block.
Demodulation soft bit sequence described in step 3 be decoding process obtained in it is laminated and after soft bit information, use
In the decision value for calculating DTX detection.
According to reconstruct bit sequence and demodulation soft bit sequence described in step 3, obtains DTX state decision value and specifically calculate
Process is as follows:
Assuming that the demodulation soft bit sequence is expressed as:The reconstruct bit sequence
It indicates are as follows:
According to formulaThe reconstruct ACK/NACK bit sequence is recompiled, new bit sequence is obtained
Column:
If the ACK/NACK information bit number is less than or equal to 2, when ACK/NACK is transmitted as multiplexing mode
When, since user terminal handles y placeholder scrambling, the new bit sequence corresponds to y location bit value and is set to previous position, i.e.,WhereinSince user terminal handles x placeholder scrambling, so that modulated symbol reflects
It is mapped to the outermost layer of planisphere, thus above-mentioned new bit sequence should be multiplied by correlation factor, to adjust bit sequenceAmplitude, wherein correlation factor is related with modulation system.
Due to position of the symbol on planisphere after information bit and the reflection modulation of y placeholder, thus calculate Euclidean distance
Shi Buyong considers x placeholder, then when ACK/NACK information bit number is less than or equal to 2, the reconstruct bit sequence and demodulation are soft
Bit sequence Euclidean distance calculation formula is as follows:
Wherein, Q ' is the ACK/NACK symbol numbers after every layer of coding specified in 36.212 agreement of 3GPP TS, QmTable
Show modulation system, factor indicates amplitude Dynamic gene, QmIt is as shown in table 3 with factor value:
Table 3
Above-mentioned Euclidean distance is DTX state decision value when ACK/NACK information bit number is less than or equal to 2.
If the ACK/NACK information bit number is 3, the reconstruct bit sequence and demodulation soft bit sequence correlation
Calculation formula is as follows:
Above-mentioned correlation is DTX state decision value when ACK/NACK information bit number is equal to 3.
If there is 2 code blocks, 2 code blocks obtain respective code block according to the above method respectively and correspond to decision value.
The comparison of decision value described in step 4 and pre-determined threshold directly feeds back comparison result when only 1 code block；When
When there are 2 code blocks, 2 code blocks are compared respectively, and comparison result is merged into processing.
When ACK/NACK information bit number is less than or equal to 2, if user terminal sends ack/nack signal, step 3
The demodulation Soft Inform ation is effective Soft Inform ation.Thus amplitude reconstruct bit sequence adjusted is close with demodulation Soft Inform ation,
The Euclidean distance acquired according to formula (1) is smaller.If user terminal be DTX, amplitude reconstruct bit sequence adjusted and
It demodulates Soft Inform ation and differs larger, i.e., the Euclidean distance acquired according to formula (1) is larger.
When ACK/NACK information bit number is 3, if user terminal transmission ack/nack signal, described in step 3
Demodulating Soft Inform ation is effective Soft Inform ation.Thus pass throughIt recompiles and obtains new sequence and the soft letter of demodulation
Breath same position symbol is identical, then the correlation acquired according to formula (2) is larger.If user terminal is DTX, pass throughIt is different with the demodulation Soft Inform ation part same position symbol to recompile the new sequence of acquisition, then according to formula
(2) correlation acquired is smaller.
Based on the above analysis, if only 1 code block, when ACK/NACK information bit number is less than or equal to 2, if decision value
Less than pre-determined threshold, then determines that user terminal sends ack/nack signal, be otherwise DTX；When ACK/NACK information bit number
When equal to 3, if decision value is greater than pre-determined threshold, determines that user terminal sends ack/nack signal, be otherwise DTX.
When there are 2 code blocks to do DTX detection, if 2 code blocks determine that user terminal sends ack/nack signal, determine
User terminal sends ack/nack signal；If 2 code blocks determine that user terminal is DTX, determines user terminal for DTX；If 1
A code block determines that user terminal sends ack/nack signal, and in addition 1 code block determines that user terminal is DTX, then by 2 code blocks
Merging is normalized in decision value and pre-determined threshold, and the state of end user is determined according to amalgamation result.It is quasi- according to above-mentioned judgement
Then, the sum of decision value and the normalization difference of pre-determined threshold on 2 code blocks are calculated, the judgement factor is obtained, the method is as follows:
Wherein, value [i] is i-th of code block decision value, and threshold [i] is i-th of code block pre-determined threshold.
If there is 2 code blocks, when ACK/NACK information bit number is less than or equal to 2, if the judgement factor R atio is less than
0, then determine that user terminal sends ack/nack signal, is otherwise DTX；When ACK/NACK information bit number is equal to 3, if institute
It states judgement factor R atio and is greater than 0, then determine that user sends ack/nack signal eventually, be otherwise DTX.
The present invention also provides a kind of PUSCH channel DTX to detect ACK/NACK device 20, and example structure schematic diagram is as schemed
Shown in 2, including judgment module 21, reconstructed module 22, decision value computing module 23 and state judging module 24.Wherein, sentence
Disconnected module 21 is used to adjudicate whether base station needs the ACK/NACK bit sequence for obtaining demodulation coding to do DTX detection, works as ACK/
When nack message number of bits is less than or equal to 3, the ACK/NACK bit sequence obtained to decoding does DTX detection；Reconstructed module 22
According to agreement 3GPP TS 36.212, reconstruct bit sequence is obtained；Decision value computing module 23 is according to the reconstruct bit sequence
Pass through Euclidean distance between two sequences of calculating when ACK/NACK information bit number is less than or equal to 2 with demodulation soft bit sequence
Decision value is obtained, when ACK/NACK information bit number is equal to 3, decision value is obtained by correlation between calculating two sequences；
State judging module 24 determines whether user terminal sends ack/nack signal by comparing decision value and threshold value, when only 1
When code block, comparison result is directly fed back；When there are 2 code blocks, 2 code blocks are compared respectively, and comparison result is carried out
Merging treatment, specific decision rule are described referring to detection method embodiment.
Above-mentioned reconstructed module includes channel coding module and Rate Matching block, wherein Rate Matching block is without carrying out
The layer of solid size block replicates.
Above-mentioned decision value computing module is also used to:, will be described heavy when the ACK/NACK information bit is less than or equal to 2
Structure bit sequence carries out amplitude adjustment according to modulation system, then calculates the Euclidean distance of itself and the demodulation soft bit sequence,
As DTX state decision value；When the ACK/NACK information bit is 3, by calculating the reconstruct bit sequence and institute
The correlation for stating demodulation soft bit sequence, obtains the DTX state decision value.
Above-mentioned state judging module is also used to: being compared by the DTX state decision value and pre-determined threshold, is adjudicated the use
Whether family terminal sends the ack/nack signal；When only 1 code block, comparison result is directly fed back；When there is 2 code blocks
When, 2 code blocks are compared respectively, and comparison result is merged into processing.
If above-mentioned state judging module, which is also used to 2 code blocks, determines that user terminal sends the ACK/NACK letter
Number, then determine that the user terminal sends the ack/nack signal；If 2 code blocks determine that the user terminal is
DTX then determines the user terminal for DTX；If 1 code block determines that the user terminal sends the ack/nack signal, separately
Outer 1 code block determines that the user terminal is DTX, then merging, root is normalized in the decision value of 2 code blocks and pre-determined threshold
The state of end user is determined according to amalgamation result.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection of the invention
Within the scope of.
Claims (11)
1. the method for ACK/NACK state-detection, feature include: on a kind of PUSCH channel
Step 1: determining whether to carry out DTX inspection according to resulting ACK/NACK information bit after ACK/NACK decoding
It surveys, if the bit number is less than or equal to predetermined bit threshold value, the ACK/NACK bit sequence that base station demodulation coding obtains is done
DTX state detection, is otherwise detected without DTX state, exports ACK/NACK information bit；
Step 2: the ACK/NACK bit sequence that the base station demodulation coding obtains being reconstructed, reconstruct bit sequence is obtained；
Step 3: the reconstruct bit sequence and demodulation soft bit sequence being subjected to operation, obtain DTX state decision value；
Step 4: the DTX state decision value being compared with pre-determined threshold, to adjudicate whether user terminal sends ACK/
NACK signal.
2. the method for ACK/NACK state-detection on a kind of PUSCH channel according to claim 1, which is characterized in that step
Bit sequence restructuring procedure described in rapid 2 specifically includes channel coding and rate-matched, and wherein rate matching procedure is without carrying out
The layer of solid size block replicates.
3. the method for ACK/NACK state-detection on a kind of PUSCH channel according to claim 1, which is characterized in that step
Demodulation soft bit sequence described in rapid 3 be decoding process obtained in it is laminated and after soft bit information.
4. the method for ACK/NACK state-detection on a kind of PUSCH channel according to claim 1, which is characterized in that step
The method that DTX state decision value described in rapid 3 obtains is as follows: when the ACK/NACK information bit is less than or equal to 2, by institute
State reconstruct bit sequence according to modulation system carry out amplitude adjustment, then calculate its with it is described demodulation soft bit sequence it is European away from
From as DTX state decision value；
When the ACK/NACK information bit is 3, by calculating the reconstruct bit sequence and the demodulation soft bit sequence
The correlation of column obtains DTX state decision value.
5. the method for ACK/NACK state-detection on a kind of PUSCH channel according to claim 1, which is characterized in that step
When DTX state decision value and pre-determined threshold described in rapid 4 are compared, when only 1 code block, comparison result is directly fed back；
When there are 2 code blocks, 2 code blocks are compared respectively, and comparison result is merged into processing.
6. according to the method described in claim 5, it is characterized in that, being carried out respectively when there is 2 code blocks to 2 code blocks
Compare, and if it includes: that 2 code blocks determine that user terminal sends ACK/NACK letter that comparison result, which is merged processing,
Number, then determine that the user terminal sends ack/nack signal；If 2 code blocks determine the user terminal for DTX,
Determine the user terminal for DTX；If 1 code block determines that the user terminal sends ack/nack signal, in addition 1 code block is sentenced
The fixed user terminal is DTX, then merging is normalized in the decision value of 2 code blocks and pre-determined threshold, according to amalgamation result
Determine the state of end user.
7. the device of ACK/NACK state-detection on a kind of PUSCH channel, which is characterized in that the device includes:
Judgment module, for determining whether to carry out according to resulting ACK/NACK information bit after ACK/NACK decoding
DTX detection, if the bit number is less than or equal to predetermined bit threshold value, the ACK/NACK bit sequence obtained to base station demodulation coding
Column do DTX state detection, otherwise detect without DTX state；
Reconstructed module, the ACK/NACK bit sequence for being obtained according to the decoding, obtains reconstruct bit sequence；
Decision value computing module, for calculating DTX state judgement according to the reconstruct bit sequence and demodulation soft bit sequence
Value；
State judging module, for being compared to the DTX state decision value with pre-determined threshold, whether to adjudicate user terminal
Send ack/nack signal.
8. the device of ACK/NACK state-detection on a kind of PUSCH channel according to claim 7, which is characterized in that institute
Stating reconstructed module includes channel coding module and Rate Matching block, wherein the Rate Matching block is without carrying out solid size block
Layer duplication.
9. the device of ACK/NACK state-detection on a kind of PUSCH channel according to claim 7, which is characterized in that institute
Decision value computing module is stated to be also used to:
When the ACK/NACK information bit is less than or equal to 2, the reconstruct bit sequence is subjected to width according to modulation system
Then degree adjustment calculates the Euclidean distance of itself and the demodulation soft bit sequence, as DTX state decision value；
When the ACK/NACK information bit is 3, by calculating the reconstruct bit sequence and the demodulation soft bit sequence
The correlation of column obtains the DTX state decision value.
10. the device of ACK/NACK state-detection on a kind of PUSCH channel according to claim 7, which is characterized in that institute
The state judging module of stating is also used to:
Compared by the DTX state decision value and pre-determined threshold, adjudicates whether the user terminal sends the ACK/NACK
Signal；When only 1 code block, comparison result is directly fed back；When there are 2 code blocks, 2 code blocks are compared respectively
Compared with, and comparison result is merged into processing.
11. the device of ACK/NACK state-detection on a kind of PUSCH channel according to claim 10, which is characterized in that
The state judging module is also used to: if 2 code blocks determine that user terminal sends the ack/nack signal, being determined
The user terminal sends the ack/nack signal；If 2 code blocks determine that the user terminal for DTX, determines
The user terminal is DTX；If 1 code block determines that the user terminal sends the ack/nack signal, in addition 1 code block is sentenced
The fixed user terminal is DTX, then merging is normalized in the decision value of 2 code blocks and pre-determined threshold, according to amalgamation result
Determine the state of end user.
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| CN107846267B (en) * | 2016-09-18 | 2021-03-09 | 大唐移动通信设备有限公司 | Feedback information processing method and device for terminal |
| CN108900277B (en) * | 2018-04-23 | 2020-07-07 | 中国科学院自动化研究所 | DTX detection method and system based on 5G communication network |
| US11057159B2 (en) | 2019-01-23 | 2021-07-06 | Hong Kong Applied Science And Technology Research Institute Co. Ltd. | Method and an apparatus for improving a determination of HARQ-ACK messages in a wireless communications system |
| US11611987B2 (en) | 2021-01-05 | 2023-03-21 | Hong Kong Applied Science And Technology Research Institute Co., Ltd | Method and device for detecting partial discontinuous transmission (DTX) using soft bits correlation |
| CN114126094A (en) * | 2021-11-02 | 2022-03-01 | 锐捷网络股份有限公司 | DTX (discontinuous Transmission) judgment method and device |
| 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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| CN103686844A (en) * | 2012-09-04 | 2014-03-26 | 北京展讯高科通信技术有限公司 | Method and system for demodulating and judging channels and communication system |
| CN104168591A (en) * | 2013-05-16 | 2014-11-26 | 普天信息技术研究院有限公司 | Detection method and apparatus for discontinuous sending at physical uplink shared channel |
| CN104168094A (en) * | 2013-05-20 | 2014-11-26 | 普天信息技术研究院有限公司 | Discontinuous transmission detection method |
| CN104168095A (en) * | 2014-08-15 | 2014-11-26 | 北京北方烽火科技有限公司 | Non-continuity transmission detection method and device |
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