CN104168094B - discontinuous transmission detection method - Google Patents
discontinuous transmission detection method Download PDFInfo
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- CN104168094B CN104168094B CN201310187368.9A CN201310187368A CN104168094B CN 104168094 B CN104168094 B CN 104168094B CN 201310187368 A CN201310187368 A CN 201310187368A CN 104168094 B CN104168094 B CN 104168094B
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Abstract
This application discloses a kind of discontinuous transmission detection method, modulation symbol is reconstructed after carrying out inversely processing in the docking collection of letters number, and test statistics is calculated accordingly, simultaneously, desired status number X and system requirements false-alarm probability judges the threshold value of test statistics when being detected according to base station, whether it is more than the threshold value finally according to the test statistics, to judge whether UE sends signal.Using the present invention can go out whether UE sends signal with effective detection, and be not only restricted to the whether available free orthogonal ZC sequences of system, while sending HARQ ACK situation using multiple information bits suitable for UE.
Description
Technical field
The present invention relates to mobile communication technology, more particularly to a kind of discontinuous transmission（Discontinuous
Transmission, DTX）Detection method.
Background technology
In 3G and 4G GSMs, user equipment（User Equipment,UE）Mandate and tune by base station
Degree realizes the reception of business datum and sends transmission.For downlink service data, UE passes through in uplink feedback ACK/NACK
Carry out signals base, if had correctly received downlink service data.But be due to UE when detecting downstream grants, may detection lose
Lose, now UE will not be in uplink feedback ACK/NACK information, and from the point of view of receiving ACK/NACK from base station, such case claims
For discontinuous transmission.Because base station is not known whether to have sent ACK/NACK, whether signal is sent if cannot distinguish between, will
There is garbled-reception ACK/NACK.Therefore, system needs to judge whether UE has signal to send by DTX detections.
Existing DTX detection methods have following two.
First method is that base station is carried out after RM decodings to the signal received, utilizes its maximum likelihood value and secondary maximum
Likelihood value calculates and obtains confidence value, and wherein confidence value Z calculation formula is：Z=[abs (maximum likelihood value)-abs（It is secondary most
Maximum-likelihood value）]/abs (maximum likelihood value).Then it is compared and adjudicates with default DTX decision thresholds.If confidence value
Z is more than DTX decision thresholds, then adjudicates UE ends and have sent signal；, whereas if confidence value Z is less than or equal to DTX decision gates
Limit, then adjudicate UE ends and do not send signal.
Second method is that base station calculates signal power and noise power respectively to the signal received, then utilizes its ratio
Value is compared and adjudicated with default DTX decision thresholds.
The first above-mentioned DTX detection method needs to obtain confidence value using maximum-likelihood decoding, for not using most
The communication system of maximum-likelihood decoding can not then use the method.And its DTX decision threshold is associated with transmission channel, different
Its pre-determined threshold of transmission channel is different, constrains it and uses scope, versatility is poor.
Above-mentioned second of DTX detection methods utilize the orthogonal ZC sequences of current idle（PUCCH Format1/ in LTE system
The orthogonal spreading sequence that 1a/1b is used, referred to as W3 sequences [+1+1-1-1]）Calculate noise power, it is not necessary to channel reservation resource.
So, when there is no the orthogonal ZC sequences of free time in system, noise power can not be just calculated, so as to cause this method not make
With.In addition, this method can not also be applied to UE sends hybrid automatic repeat-request response using multiple information bits
The situation of (hybridautomatic repeat-request acknowledgement, HARQ-ACK).
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of discontinuous transmission detection method, this method is unrestricted
In the whether available free orthogonal ZC sequences of system, and suitable for situations of the UE using multiple information bits transmission HARQ-ACK.
In order to achieve the above object, technical scheme proposed by the present invention is：
A kind of discontinuous transmission method, including：
A, base station according to the antenna base band data being currently received, obtain business datum symbol that user equipment (UE) sends and
Reference symbol；
B, the base station obtain corresponding Noise Variance Estimation value according to the reference symbol；And to the business datum
Symbol and reference symbol are transmitted end inversely processing, and modulation symbol, the transmission is reconstructed to the result of the inversely processing
Inversely processing is held to include carrying out equilibrium calculation to the business datum symbol and reference symbol；
C, the base station is according to the symbolic vector after the modulation symbol after the reconstruct, the equilibrium calculation and described makes an uproar
Sound estimate of variance, current test statistics T is determined according to NP criterions；
D, the base station bit length according to used in the UE sends HARQ-ACK, determine that discontinuous transmission DTX is examined
The status number of survey；And the status number detected according to default false-alarm probability and the DTX, it is determined that corresponding DTX detection threshold values,
The false-alarm probability be by it is no transmission signal detection be ACK shape probability of states；
E, the DTX detection threshold values and the inspection statistics value T be compared, determine whether the UE sends letter
Number.
In summary, discontinuous transmission detection method proposed by the present invention, the docking collection of letters number is weighed after carrying out inversely processing
Structure modulation symbol, and test statistics is calculated accordingly, meanwhile, desired status number X and system will when being detected according to base station
The false-alarm probability asked judges the threshold value of test statistics, whether is more than the threshold value finally according to the test statistics, i.e.,
It can determine whether out whether UE sends signal.So, due to the present invention without dependent on orthogonal sequence realize, therefore, be not only restricted to be
System whether available free orthogonal ZC sequences, and by thus according to UE send HARQ-ACK information bit length determines desired by
Detection status number, and according to detection status number set it is corresponding examine threshold value, therefore, it is adaptable to which UE uses multiple information ratios
Spy sends HARQ-ACK situation.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
It is right below in conjunction with the accompanying drawings and the specific embodiments to make the object, technical solutions and advantages of the present invention clearer
The present invention is described in further detail.
The present invention core concept be：The docking collection of letters number is transmitted after the inversely processing at end, modulation symbol is reconstructed, according to NP
Criterion, a test statistics is constructed using the modulation symbol of reconstruct, and according to the bit length of UE transmission HARQ-ACK information
It is determined that related detection status number, according to detection status number and default false-alarm probability, sets corresponding inspection threshold value, finally
Test statistics is compared with the threshold value, to determine whether that information is sent.So, due to not depended in the above method
Orthogonal sequence is realized, therefore, is not only restricted to the whether available free orthogonal ZC sequences of system, and by being sent thus according to UE
The bit length of HARQ-ACK information determines related detection status number, and examines thresholding according to detection status number setting is corresponding
Value, therefore suitable for situations of the UE using multiple information bits transmission HARQ-ACK.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one, as shown in figure 1, the embodiment mainly includes：
Step 101, base station obtain user equipment according to the antenna base band data being currently received（UE）The business number of transmission
According to symbol and reference symbol.
The concrete methods of realizing of this step is grasped by those skilled in the art, will not be repeated here.
Step 102, the base station obtain corresponding Noise Variance Estimation value according to the reference symbol；And to the industry
Business data symbol and reference symbol are transmitted end inversely processing, and modulation symbol is reconstructed to the result of the inversely processing, institute
Stating transmitting terminal inversely processing includes carrying out equilibrium calculation to the business datum symbol and reference symbol.
In this step, the acquisition methods of Noise Variance Estimation value will not be repeated here compared with system.
In actual applications, needed when being transmitted end inversely processing operation to be performed can with system type it is different without
Together, such as, detected for the DTX of PUCCH Format1/1a/1b in LTE/LTE-A systems, it is not necessary to be modulated/demodulate,
Channel coding/decoding is calculated.But, it will at least include the operation of equilibrium calculation.
Further, the transmitting terminal inversely processing can also include：
To the result of the equilibrium calculation, it is demodulated and merges, the result to merging carries out channel decoding.
The detailed process of above-mentioned inversely processing, which is embodied as those skilled in the art, to be grasped and will not be repeated here.
Step 103, the base station according to the symbolic vector after the modulation symbol after the reconstruct, the equilibrium calculation and
The Noise Variance Estimation value, according to Nie Man-Pearson came（Neyman-Pearson, NP）Criterion determines current test statistics
T。
, will be according to NP criterions, to determine current test statistics T in this step.Specifically, can be by the following method
Realize：
Step 1031, according toCalculate detection t；Wherein,For to the business datum symbol and with reference to symbol
Number carry out obtained symbolic vector after equilibrium calculation；dHFor the conjugate transposition of the modulation symbol vector after reconstruct；MsymbAfter reconstruct
Modulation symbol number.
Step 1032, using the t, according toCalculating obtains current test statistics T, its
In,For noise variance.
Test statistics is constructed in this stepIt should be noted that the test statistics will be obeyed certainly
By spending the chi square distribution for 2.
Step 104, the base station bit length according to used in the UE sends HARQ-ACK, determine discontinuous transmission
The status number of DTX detections；And the status number detected according to default false-alarm probability and the DTX, it is determined that corresponding DTX detections door
Limit value, the false-alarm probability be by it is no transmission signal detection be ACK shape probability of states.
It is preferred that
Explanation is needed exist for, in actual applications, UE can send the HARQ-ACK information of different bit lengths,
Desired status number is differed when eNodeB carries out DTX detections.If for example, UE send 1 bit HARQ-ACK information,
ENodeB needs to make decisions output in DTX/ACK/NACK this three state；If UE sends 2 bit HARQ-ACK information,
ENodeB needs to make decisions output in DTX/ACK-ACK/ACK-NACK/NACK-ACK/NACK-NACK this 5 kinds of states.Such as
Fruit UE sends schedule information（SR）, now, UE does not send HARQ-ACK information, then eNodeB is needed in DTX/SR, this 2 kinds of shapes
Output is made decisions in state.Therefore, can be according to X=2 in this stepN+ 1, to determine the status number X of DTX detections, wherein, N is
The UE sends bit length used in HARQ-ACK.
It is preferred that DTX detection threshold values can be determined in this step using following methods：
First, according to α=（X-1）*PDTX→ACK, determine without the probable value α that transmission signal detection is other states.
Wherein, α≤1, PDTX→ACKFor the false-alarm probability, the value is preset value to embody not sending for system permission
Signal detection is the probability demands of ACK states, and X is the status number that the DTX is detected.
Then, according to test statisticsCharacteristic of the free degree for 2 chi square distribution is obeyed, by the right side
Tail probabilities are corresponding when being αValue is defined as the detection threshold value.
In this step, the bit length according to used in UE sends HARQ-ACK determines state that current DTX is detected
Number, and then determine according to status number corresponding detection threshold value.So, corresponding to the HARQ-ACK information of different bit lengths
Detection threshold value also by difference.So take into full account that UE sends bit length used in HARQ-ACK at step 104,
So as to ensure to be applied to the situation that UE sends HARQ-ACK using multiple information bits.
Here, the specific method that network side obtains bit length used in UE transmissions HARQ-ACK is those skilled in the art institute
Grasp, will not be repeated here.
Step 105, the DTX detection threshold values and the inspection statistics value T be compared, whether determine the UE
Send signal.
It is preferred that the specific determination methods of this step are：
If the inspection statistics value T is more than the DTX detection threshold values, it is determined that the UE sends signal, otherwise,
Determine that the UE does not send signal.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (5)
1. a kind of discontinuous transmission method, it is characterised in that including：
A, base station obtain business datum symbol and reference that user equipment (UE) is sent according to the antenna base band data being currently received
Symbol；
B, the base station obtain corresponding Noise Variance Estimation value according to the reference symbol；And to the business datum symbol
End inversely processing is transmitted with reference symbol, and modulation symbol is reconstructed to the result of the inversely processing, the transmitting terminal is inverse
Processing includes carrying out equilibrium calculation to the business datum symbol and reference symbol；
C, the base station are according to the symbolic vector after the modulation symbol after the reconstruct, the equilibrium calculation and the noise side
Poor estimate, current test statistics T is determined according to Nie Man-Pearson came NP criterions；
D, the base station bit length according to used in the UE sends HARQ-ACK, determine discontinuous transmission DTX detections
Status number；And the status number detected according to default false-alarm probability and the DTX, it is determined that corresponding DTX detection threshold values, described
False-alarm probability be by it is no transmission signal detection be ACK shape probability of states；
E, the DTX detection threshold values and the inspection statistics value T be compared, determine whether the UE sends signal；
Wherein, the step c includes：
According toCalculate detection t；Wherein,To carry out equilibrium calculation to the business datum symbol and reference symbol
The symbolic vector obtained afterwards；dHFor the conjugate transposition of the modulation symbol vector after reconstruct；MsymbFor the number of the modulation symbol after reconstruct
Mesh；
Using the t, according toCalculating obtains current test statistics T, wherein,For noise side
Difference.
2. according to the method described in claim 1, it is characterised in that according to X=2 in step dN+ 1, calculate the DTX detections
Status number X, wherein, N is that the UE sends bit length used in HARQ-ACK.
3. according to the method described in claim 1, it is characterised in that according to default false-alarm probability and described described in step d
The status number of DTX detections, it is determined that corresponding DTX detection threshold values include：
According to α=(X-1) * PDTX→ACK, it is determined that by without send signal detection be other states probable value α, wherein, α≤1,
PDTX→ACKFor the false-alarm probability, X is the status number that the DTX is detected；
According to test statisticsCharacteristic of the free degree for 2 chi square distribution is obeyed, is α by right tail probabilities
When it is correspondingValue is defined as the detection threshold value.
4. according to the method described in claim 1, it is characterised in that transmitting terminal inversely processing further comprises described in step b：
To the result of the equilibrium calculation, it is demodulated and merges, the result to merging carries out channel decoding.
5. according to the method described in claim 1, it is characterised in that the step e includes：
If the inspection statistics value T is more than the DTX detection threshold values, it is determined that the UE sends signal, otherwise, it determines
The UE does not send signal.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846948B (en) * | 2015-01-13 | 2020-04-28 | 中兴通讯股份有限公司 | Method and device for realizing HARQ-ACK detection |
| CN105847199B (en) * | 2016-03-18 | 2018-12-07 | 中国科学院自动化研究所 | The method and device of PUSCH Channel Detection ACK/NACK state |
| CN106255136B (en) * | 2016-09-13 | 2020-04-14 | 京信通信系统（中国）有限公司 | DTX (discontinuous Transmission) judging method and device |
| CN108924965B (en) * | 2017-04-24 | 2023-05-23 | 中兴通讯股份有限公司 | Discontinuous transmission detection method, device, base station and 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 |
| US11363578B2 (en) | 2020-03-24 | 2022-06-14 | Hong Kong Applied Science And Technology Research Institue Company Limited | Method and device for detecting discontinuous transmission (DTX) for small block encoded signals |
| CN112165370B (en) * | 2020-08-27 | 2022-07-12 | 新华三技术有限公司成都分公司 | Method for detecting Discontinuous Transmission (DTX), equipment and storage medium |
| CN114258060B (en) * | 2020-09-24 | 2023-10-20 | 大唐移动通信设备有限公司 | DTX detection method, DTX detection device and processor readable storage medium |
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| CN102148660A (en) * | 2010-02-04 | 2011-08-10 | 中兴通讯股份有限公司 | Method and system for processing uplink control channel information |
| CN102892186A (en) * | 2011-07-19 | 2013-01-23 | 中兴通讯股份有限公司 | Method and device for determining physical downlink control channel resource |
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| WO2010099653A1 (en) * | 2009-03-03 | 2010-09-10 | 深圳华为通信技术有限公司 | Signal encoding method and apparatus, and combination feedback signal encoding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102148660A (en) * | 2010-02-04 | 2011-08-10 | 中兴通讯股份有限公司 | Method and system for processing uplink control channel information |
| CN102892186A (en) * | 2011-07-19 | 2013-01-23 | 中兴通讯股份有限公司 | Method and device for determining physical downlink control channel resource |
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