CN103327515B - The detection method of special burst and device - Google Patents
The detection method of special burst and device Download PDFInfo
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- CN103327515B CN103327515B CN201210081529.1A CN201210081529A CN103327515B CN 103327515 B CN103327515 B CN 103327515B CN 201210081529 A CN201210081529 A CN 201210081529A CN 103327515 B CN103327515 B CN 103327515B
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Abstract
The invention provides a kind of detection method and device of special burst, wherein, utilize data division and TFCI part to judge, namely add the information in order to judge; Meanwhile, utilize again detection threshold to judge the judgement information obtained, finally show whether burst is special burst.At this, not only increase judgement information, simultaneously again to the space of makeing mistakes that this judgement information is certain, the False Rate that special burst is detected can be reduced thus.
Description
Technical field
The present invention relates to mobile communication technology field, particularly a kind of detection method of special burst and device.
Background technology
The development of mobile communication technology defines the mobile communication system of multiple types, as the global system for mobile communications (GlobalSystemforMobileCommunication in second generation mobile communication system (2G), GSM), TD SDMA (TimeDivisionSynchronousCodeDivisionMultipleAccess in 3-G (Generation Three mobile communication system) (3G), TD-SCDMA) system, Long Term Evolution (LongTermEvolution in next generation mobile communication system, LTE) system and worldwide interoperability for microwave access (WorldwideInteroperabilityforMicrowaveAccess, WIMAX) system.
When communicating in TD-SCDMA system, not always there are data to be sent, now system uses discontinuous transmission (DiscontinuousTransmission, DTX) method.Concrete, when physical layer does not receive high level data or data volume is less, transmitting terminal is according to the configuration parameter of high level, special burst (SpecialBurst is sent by the dispatching cycle of setting, SB), to ensure the Synchronization Control of air interface user equipment (UserEquipment, UE) and base station (in other words transmitting terminal and receiving terminal).Meanwhile, other moment during DTX, then system stops sending, thus can save energy (comprising transmitting terminal and receiving terminal) and reduce unnecessary interference.
Please refer to Fig. 1, it is the form schematic diagram that existing transmitting terminal sends special burst.As shown in Figure 1, in TD-SCDMA system, a radio frames comprises the identical subframe of two forms, is respectively first subframe and second subframe.This first subframe and second subframe mainly comprise again: transformat combination mark (TransportFormatCombinationIndicator, TFCI) partly, transmitting power control/simultaneous bias (TransmittingPowerControl/SynchronizationShift, TPC/SS) partly, training sequence (Midamble) part and data division.Structure of time slot and the conventional (NormalBurst that happens suddenly of special burst, NB) consistent, but the TFCI of special burst is partially filled bit " 0 ", the data division of special burst can fill random number, also can be the specific bit sequence that transmitting terminal and receiving terminal are made an appointment, i.e. predetermined bit sequences, such as, " 0101...... " sequence.
In prior art, a kind of detection method of special burst is comprised: the channel burst information after receiving terminal receiving demodulation; Extract the TFCI part in burst, and to TFCI Partial Decode; Judge whether TFCI is 0, if TFCI is 0, then determine that the information received is special burst; If TFCI is not 0, then determine that the information received is conventional burst.
Under normal circumstances, judge whether current burst is special burst by TFCI decoding.But in practical communication process, due to the deterioration of link performance, the TFCI partial information error rate that receiving terminal receives is higher, thus judge that whether current burst is the high erroneous judgement of special burst by causing according to TFCI decoding.Above-mentioned erroneous judgement can affect the high-rise adjustment for communication link, is also unfavorable for that physical layer is carried out correct power and synchronously waits control.
Summary of the invention
The object of the present invention is to provide a kind of detection method and device of special burst, to solve in prior art, the problem that the False Rate for special burst detection is high.
For solving the problems of the technologies described above, the invention provides a kind of detection method of special burst, comprising:
Receiving terminal is modulated for the data division of special burst and TFCI part, obtains first modulation symbol sequence of receiving terminal this locality;
Receiving terminal extracts data division and TFCI part from the burst received, and obtains the second modulation symbol sequence received;
Related operation is carried out to the first modulation symbol sequence and the second modulation symbol sequence, obtains both correlated results;
Compared with detection threshold by described correlated results, if correlated results is greater than detection threshold, then the burst obtaining receiving is special burst;
Wherein, receiving terminal carries out the data division of the special burst modulated is the specific bit sequence that transmitting terminal and receiving terminal are made an appointment.
Optionally, in the detection method of described special burst, transmitting terminal and receiving terminal determine described specific bit sequence in front communication process.
Optionally, in the detection method of described special burst, the figure place of described specific bit sequence meets the structure of time slot of a radio frames.
Optionally, in the detection method of described special burst, receiving terminal also performed following steps extract data division and TFCI part from the burst received before: receiving terminal carries out joint-detection to the burst received.
Optionally, in the detection method of described special burst, utilize following formula to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtain both correlated results:
R＝X
HY
Wherein, R is correlated results, X
hbe the conjugate transpose of the first modulation symbol sequence, Y is the second modulation symbol sequence.
Optionally, in the detection method of described special burst, described detection threshold is determined according to channel simulator result.
Optionally, in the detection method of described special burst, described detection threshold is 6.
The present invention also provides a kind of checkout gear of special burst, comprising:
Modulation module, in order to modulate for the data division of special burst and TFCI part, obtains first modulation symbol sequence of receiving terminal this locality;
Extraction module, in order to extract data division and TFCI part from the burst received, obtains the second modulation symbol sequence received;
Computing module, in order to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtains both correlated results;
Comparison module, in order to be compared with detection threshold by described correlated results, if correlated results is greater than detection threshold, then the burst obtaining receiving is special burst;
Wherein, the data division of the special burst of described modulation module modulation is the specific bit sequence that transmitting terminal and receiving terminal are made an appointment.
Optionally, in the checkout gear of described special burst, also comprise: detection module, in order to carry out joint-detection to the burst received.
Optionally, in the checkout gear of described special burst, utilize following formula to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtain both correlated results:
R＝X
HY
Wherein, R is correlated results, X
hbe the conjugate transpose of the first modulation symbol sequence, Y is the second modulation symbol sequence.
Optionally, in the checkout gear of described special burst, described detection threshold is determined according to channel simulator result.
In the detection method and device of special burst provided by the invention, utilize data division and TFCI part to judge, namely add the information in order to judge; Meanwhile, utilize again detection threshold to judge the judgement information obtained, finally show whether burst is special burst.At this, not only increase judgement information, simultaneously again to the space of makeing mistakes that this judgement information is certain, the False Rate that special burst is detected can be reduced thus.
Accompanying drawing explanation
Fig. 1 is the form schematic diagram that existing transmitting terminal sends special burst;
Fig. 2 is the schematic flow sheet of the detection method of the special burst of the embodiment of the present invention;
Fig. 3 is the module diagram of the checkout gear of the special burst of the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the detection method of special burst provided by the invention and device are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form simplified very much, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
Please refer to Fig. 2, it is the schematic flow sheet of the detection method of the special burst of the embodiment of the present invention.As shown in Figure 2, the detection method of described special burst comprises the steps:
S20: receiving terminal is modulated for the data division of special burst and TFCI part, obtains first modulation symbol sequence of receiving terminal this locality;
S21: receiving terminal extracts data division and TFCI part from the burst received, obtains the second modulation symbol sequence received;
S22: related operation is carried out to the first modulation symbol sequence and the second modulation symbol sequence, obtains both correlated results;
S23: described correlated results is compared with detection threshold, if correlated results is greater than detection threshold, then the burst obtaining receiving is special burst;
Wherein, receiving terminal carries out the data division of the special burst modulated is the specific bit sequence that transmitting terminal and receiving terminal are made an appointment.
Accordingly, the present embodiment also provides a kind of checkout gear of special burst.Please refer to Fig. 3, it is the module diagram of the checkout gear of the special burst of the embodiment of the present invention.As shown in Figure 3, the checkout gear of described special burst comprises:
Modulation module 30, in order to modulate for the data division of special burst and TFCI part, obtains first modulation symbol sequence of receiving terminal this locality;
Extraction module 31, in order to extract data division and TFCI part from the burst received, obtains the second modulation symbol sequence received;
Computing module 32, in order to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtains both correlated results;
Comparison module 33, in order to be compared with detection threshold by described correlated results, if correlated results is greater than detection threshold, then the burst obtaining receiving is special burst;
Wherein, the data division of the special burst of described modulation module 30 modulation is the specific bit sequence that transmitting terminal and receiving terminal are made an appointment.
In the detection method of the special burst provided at the present embodiment and device, utilize data division and TFCI part to judge, namely add the information in order to judge; Meanwhile, utilize again detection threshold to judge the judgement information obtained, finally show whether burst is special burst.At this, not only increase judgement information, simultaneously again to the space of makeing mistakes that this judgement information is certain, the False Rate that special burst is detected can be reduced thus.
In the present embodiment, first utilize modulation module 30 to perform step S20, to obtain the first modulation symbol sequence, then utilize extraction module 31 to perform step S21, to obtain the second modulation symbol sequence; But, in other embodiments of the invention, extraction module 31 also first can be utilized to perform step S21, to obtain the second modulation symbol sequence, then utilize modulation module 30 to perform step S20, to obtain the first modulation symbol sequence; Or utilize modulation module 30 to perform step S20 simultaneously, to obtain the first modulation symbol sequence, utilize extraction module 31 to perform step S21, to obtain the second modulation symbol sequence.Preferably, first modulation module 30 is utilized to perform step S20, to obtain the first modulation symbol sequence, extraction module 31 is then utilized to perform step S21, to obtain the second modulation symbol sequence, now, obtaining the first modulation symbol sequence is the equal of a preparation, and namely receiving terminal is got ready at any time, once there be burst just can carry out follow-up detecting step, thus, improve the detection efficiency of special burst.
Concrete, first utilize modulation module 30 to perform step S20: to modulate for the data division of special burst and TFCI part, obtain first modulation symbol sequence of receiving terminal this locality.At this, described data division is the specific bit sequence that transmitting terminal and receiving terminal are made an appointment, if namely transmitting terminal sends special burst, then its data division is a specific bit sequence, and receiving terminal also knows that why concrete this specific bit sequence is, this specific bit sequence can before transmitting terminal and receiving terminal in communication process (communication process before this), such as when connection establishment, transmitting terminal and receiving terminal being determined alternately by communication data (comprising communication format etc.).Such as, this data division (in other words this specific bit sequence) is the bit sequence that " 0 " and " 1 " replaces, and namely " 01010101...... " is certain, and the figure place of this specific bit sequence need meet the structure of time slot of a radio frames; In addition, the bit sequence that this data division (in other words this specific bit sequence) also can replace for " 00 " and " 11 ", i.e. " 00110011...... ", why concrete this specific bit sequence is, specifically can be arranged by communicating pair (i.e. transmitting terminal and receiving terminal), the application does not limit this.
The object performing step S20 is, assuming that transmitting terminal have sent a special burst, so when there is no error, extract data division wherein and TFCI part, receiving terminal will obtain such first modulation symbol sequence, namely now, receiving terminal has done a preparation, truly have received a burst at receipt of subsequent end, and when the data division extracted wherein and TFCI part, only need to do some simple calculations and compare work just can reach a conclusion.Meanwhile, at this, utilize data division and TFCI part as judgement information, relative to only utilizing TFCI part as judgement information in prior art, in the present embodiment, as judging that the amount of information of information adds.
In the present embodiment, then utilize extraction module 31 to perform step S21: receiving terminal extracts data division and TFCI part from the burst received, obtain the second modulation symbol sequence received.Now, be receiving terminal and have received burst information from transmitting terminal truly, receiving terminal extracts data division and TFCI part from this burst information, obtains the second modulation symbol sequence received.In the present embodiment, receiving terminal before extracting data division and TFCI part from the burst received, first perform a Multiuser Detection step: joint-detection is carried out to the burst received, the impact of the channel factor such as channel disturbance, " near-far interference " for burst information can be reduced by this joint-detection, improve the reliability of the burst information received.Thus, can further improve and judge that whether this burst information is the judgement reliability of special burst.
Then, computing module 32 is utilized to perform step S22: to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtain both correlated results.In the present embodiment, utilize following formula to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtain both correlated results:
R=X
hy (formula 1)
Wherein, R is correlated results, X
hbe the conjugate transpose of the first modulation symbol sequence, Y is the second modulation symbol sequence.
The object performing this step S22 is, pass through related operation, to obtain the degree of correlation of the first modulation symbol sequence and the second modulation symbol sequence, at this, make use of a simple related operation formula 1, in other embodiments of the invention, also can use other modes, only can obtain the degree of correlation of the first modulation symbol sequence and the second modulation symbol sequence.
After the correlated results obtaining the first modulation symbol sequence and the second modulation symbol sequence, comparison module 33 is utilized to perform step S23: to be compared with detection threshold by described correlated results, if correlated results is greater than detection threshold, then the burst obtaining receiving is special burst.At this, described detection threshold obtains according to channel simulator result, repeatedly channel simulator can be carried out, to obtain the detection threshold of a confidence level higher (namely can distinguish special burst), preferably, described detection threshold is 6, and namely correlated results is greater than this detection threshold 6 usually, and the burst received is special burst; And correlated results is less than or equal to detection threshold 6, this burst is generally no special burst.In the present embodiment, by increasing judgement information, simultaneously again to the space of makeing mistakes that this judgement information is certain, the False Rate that special burst is detected is decreased.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection range of claims.
Claims (9)
1. a detection method for special burst, is characterized in that, comprising:
Receiving terminal is modulated for the data division of special burst and TFCI part, obtains first modulation symbol sequence of receiving terminal this locality;
Receiving terminal extracts data division and TFCI part from the burst received, and obtains the second modulation symbol sequence received;
Related operation is carried out to the first modulation symbol sequence and the second modulation symbol sequence, obtains both correlated results;
Compared with detection threshold by described correlated results, if correlated results is greater than detection threshold, then the burst obtaining receiving is special burst;
Wherein, receiving terminal carries out the data division of the special burst modulated is the specific bit sequence that transmitting terminal and receiving terminal are made an appointment;
Utilize following formula to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtain both correlated results:
R＝X
HY
Wherein, R is correlated results, X
hbe the conjugate transpose of the first modulation symbol sequence, Y is the second modulation symbol sequence.
2. the detection method of special burst as claimed in claim 1, it is characterized in that, transmitting terminal and receiving terminal determine described specific bit sequence in front communication process.
3. the detection method of special burst as claimed in claim 2, it is characterized in that, the figure place of described specific bit sequence meets the structure of time slot of a radio frames.
4. the detection method of special burst as claimed in claim 1, is characterized in that, receiving terminal also performed following steps extract data division and TFCI part from the burst received before:
Receiving terminal carries out joint-detection to the burst received.
5. the detection method of the special burst as described in any one in Claims 1-4, is characterized in that, described detection threshold is determined according to channel simulator result.
6. the detection method of special burst as claimed in claim 5, it is characterized in that, described detection threshold is 6.
7. a checkout gear for special burst, is characterized in that, comprising:
Modulation module, in order to modulate for the data division of special burst and TFCI part, obtains first modulation symbol sequence of receiving terminal this locality;
Extraction module, in order to extract data division and TFCI part from the burst received, obtains the second modulation symbol sequence received;
Computing module, in order to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtains both correlated results;
Comparison module, in order to be compared with detection threshold by described correlated results, if correlated results is greater than detection threshold, then the burst obtaining receiving is special burst;
Wherein, the data division of the special burst of described modulation module modulation is the specific bit sequence that transmitting terminal and receiving terminal are made an appointment;
Utilize following formula to carry out related operation to the first modulation symbol sequence and the second modulation symbol sequence, obtain both correlated results:
R＝X
HY
Wherein, R is correlated results, X
hbe the conjugate transpose of the first modulation symbol sequence, Y is the second modulation symbol sequence.
8. the checkout gear of special burst as claimed in claim 7, is characterized in that, also comprise:
Detection module, in order to carry out joint-detection to the burst received.
9. the checkout gear of special burst as claimed in claim 7 or 8, it is characterized in that, described detection threshold is determined according to channel simulator result.
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Effective date of registration: 20180622 Address after: 201206 Pudong New Area, Shanghai, China (Shanghai) free trade pilot area, 1258 A406 3 fourth story room. Patentee after: Chen core technology Co., Ltd. Address before: 201203 Ming Yue Road, Pudong New Area, Shanghai, No. 1258 Patentee before: Leadcore Technology Co., Ltd. |