CN101106436A - A transmission and detection method for special burst and its device - Google Patents
A transmission and detection method for special burst and its device Download PDFInfo
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- CN101106436A CN101106436A CNA2006100897722A CN200610089772A CN101106436A CN 101106436 A CN101106436 A CN 101106436A CN A2006100897722 A CNA2006100897722 A CN A2006100897722A CN 200610089772 A CN200610089772 A CN 200610089772A CN 101106436 A CN101106436 A CN 101106436A
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Abstract
The invention provides a special outburst delivering method, which projects the data part, TFCI and TPC/SS command words in wireless sub-frames on channels to modulate and deliver, wherein the part of TFCI is set as zero, the data part is filled with a preset bit sequence. The invention also correspondingly provides a special outburst detecting method, comprising the steps as following: A. pick up TFCI fields from the received information to decode; B. determine whether the decoded TFCI is zero or not, and if yes, keep on to the step C, otherwise the normal decoding process is performed; C. pick up the data part and judge, and if the deviation ratio of the received bit sequence to the preset bit sequence is in the allowable range, corresponding sequent processes are performed according to the received information, otherwise the information is discarded. Besides, the invention also provides a special outburst delivering and detecting device, which can effectively prevent the receiving end from the miss-detection of the special outburst, and thereby improve the performance of data link.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of transmission, detection method and device of special burst.
Background technology
At Time Division-Synchronous Code Division Multiple Access (TD-SCDMA, when Time-Division Synchronization CodeDivision-Multiple-Access) communicating in the system, be not always to have data to be sent, when physical layer is not received high level data, system need be according to the configuration parameter of high level, by sending special burst (special burst) dispatching cycle of setting, with guarantee the air interface subscriber equipment (UE, UserEquipment) and the Synchronization Control of base station.
At present, the form that existing system sends special burst as shown in Figure 1, in the TD-SCDMA system, a radio frames comprises two subframes that form is identical.Wherein, first, second subframe mainly comprises: combinations of transport formats indication (TFCI, Transport Format Combination Indicator) partly, transmitting power control/simultaneous bias (TPC/SS, transmitting power control/synchronizationshift) partly, intermediate code (midamble) part and data division.
The existing process that sends special burst, as shown in Figure 2:
Step 203 ', by normal code multiplexing flow process high level data is handled.
The process that existing recipient's reception information detects, as shown in Figure 3:
Channel special burst information behind step 301, the recipient's receiving demodulation;
Step 304 ', the information that receives is not special burst, deciphers processing normally.
In the practical communication process, because the deterioration of link performance, transmitting terminal has sent valid data, but receiving terminal is when detecting, and probably TFCI partly being judged by accident is 0; Perhaps transmitting terminal does not send data at all, but because the receiving terminal flase drop, receiving terminal is special burst with the noise data erroneous judgement that receives.Therefore, above-mentioned situation all can cause receiving terminal erroneous judgement, can not really react the situation of eating dishes without rice or wine, thereby is unfavorable for high-rise link being carried out suitable adjustment, is unfavorable for that also physical layer carries out power, control such as synchronous.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of transmission, detection method and device of special burst, can effectively avoid the flase drop of receiving terminal to special burst, thereby improves link performance.
The technical scheme that realizes the object of the invention is as follows:
A kind of sending method of special burst is mapped to the data division in the wireless sub-frame, TFCI and TPC/SS command word on the channel and modulation sends, and wherein TFCI partly is set to 0, and data division is filled predetermined bit sequences.
Preferably, described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
A kind of detection method of special burst comprises step:
A, from reception information, extract the TFCI field and to its decoding;
Whether the TFCI after B, the judgement decoding is zero, if be zero then continuation step C; Otherwise decipher processing normally;
C, extraction data division are also adjudicated, if reception bit sequence and the inconsistent ratio of predetermined bit sequences are then carried out corresponding subsequent processing according to reception information within allowed band; Otherwise abandon this information.
Preferably, described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
Preferably, described allowed band is determined according to channel fading, actual interference, noise situations.
Described allowed band is 0%-20%.
In addition, the present invention also provides a kind of dispensing device of special burst, comprising:
The coding map unit is used for data division and is set to predetermined bit sequences, TFCI partly is set to 0, and data division, TFCI and TPC/SS command word are mapped on the corresponding physical channel;
The framing transmitting element be used for the data message structure of time slot in accordance with regulations after the described coding map unit processing is formed wireless sub-frame, and modulation sends.
Preferably, described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
A kind of checkout gear of special burst is provided accordingly, comprises:
Receiving element is used for reception information, extracts the TFCI field and passes on demodulating unit, extracts data division and passes on decision unit;
Demodulating unit is used for the TFCI field is deciphered processing, and decoding information is passed on comparing unit;
Decision unit is used for data portion and carries out hard decision, and court verdict is passed on comparing unit;
Comparing unit is used to judge whether the TFCI after the decoding is zero, if non-vanishing, then change the channel decoding unit over to and deciphers processing normally; If be zero, then compare court verdict and predetermined bit sequences, the calculating error rate; Be further used for judging that the error rate is whether within allowed band, if then the notifier processes unit continues to handle; Otherwise abandon information;
Processing unit is used for carrying out corresponding subsequent processing according to special burst information.
Preferably, described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
Preferably, described allowed band is determined according to channel fading, actual interference, noise situations.
Described allowed band is 0%-20%.
Compared with prior art, technical scheme provided by the invention has following beneficial effect:
The present invention fills data division with predefined bit sequence by changing the transmission form of existing special burst, for reducing receiving terminal the flase drop of special burst is laid a solid foundation.After receiving terminal receives information, by TFCI is partly deciphered, TFCI after the decoding is carried out the judgement of first level, if by would also need further the data division in the information to be carried out the judgement of second level, bit sequence and predetermined bit sequence by after relatively adjudicating calculate error rate P; Compare error rate P and set error rate thresholding P according to actual conditions in advance
ThIf P is less than P
Th, illustrate that then the information that receives is special burst, so just can utilize special burst to carry out corresponding physical layer control.Judgement through these two levels makes receiving terminal can distinguish accurately that the information of reception is valid data, flase drop information, the still real special burst that needs, thus take follow-up respective handling.Like this, both be under the communication environment that influences such as channel fading, interference and noise are arranged, receiving terminal also can reduce the erroneous judgement of specialburst to greatest extent, the real situation of eating dishes without rice or wine of reacting, be beneficial to high level link is carried out suitable adjustment, also be beneficial to physical layer and carry out power, control such as synchronous, thereby improve the performance of link greatly.
Below in conjunction with the drawings and specific embodiments the present invention is further described.
Description of drawings
Fig. 1 is the form schematic diagram of existing special burst;
Fig. 2 is the process of transmitting schematic diagram of existing special burst;
Fig. 3 is the testing process schematic diagram of existing special burst;
Fig. 4 is the form schematic diagram of special burst of the present invention;
Fig. 5 is the process of transmitting schematic diagram of special burst of the present invention;
Fig. 6 is the testing process schematic diagram of special burst of the present invention;
Fig. 7 A is the dispensing device block diagram of special burst of the present invention;
Fig. 7 B is the checkout gear block diagram of special burst of the present invention;
Fig. 8 is the block diagram that base band data is handled in the TD-SCDMA of the present invention system.
Embodiment
In communication process, when baseband processing unit was not received high level data, system need periodically send special burst according to the configuration parameter of high level, was used for the recipient and carried out power, control such as synchronous.Be example with the TD-SCDMA system below, specify transmission form, the process of transmitting of special burst, reach the process that detects when the recipient receives special burst.
The transmission form of special burst at first, is described in conjunction with Fig. 4.As shown in Figure 4, a radio frames comprises first subframe and second subframe, and these two sub-frame formats are identical.At existing sub-frame formats,, mainly comprise TFCI part, TPC/SS part, Midamble part and data division with reference to shown in Figure 1.Wherein, TFCI part, TPC/SS partly do not change, and just data division does not recharge random number, but fills predefined fixed bit sequence, can be 0101 0101.......In addition, this predefined fixed bit sequence can also be other any fixed bit sequences, if satisfy preestablish, condition that receiving-transmitting sides is all known.Obviously, such bit sequence can have a variety of.Set main purpose that the fixed bit sequence replaces random number and be exactly for the recipient when the detection information, increase judgment condition, by predefined bit sequence is detected, assist the TFCI judged result, thereby judge that more accurately signal that current sender sends is data or special is burst, effectively avoids false drop rate.
Fig. 8 is the block diagram that base band data is handled in the TD-SCDMA system, and baseband processing unit B receives the data that high-rise control and data cell A send, carry out respective handling after, send the data to Transmit Receive Unit C.Wherein, baseband processing unit mainly comprises: chnnel coding/decoding module 81, modulation, framing sending module 82, signal, receiving demodulation module 83.
Chnnel coding/decoding module 81 comprises coding and deciphers two submodules.Wherein, the major function of coding submodule 811 is to receive the data that high-rise control and data cell A send, and to these data encode, interweave, processing such as rate-matched, physical channel mapping; The major function of decoding module 812 is demodulating datas that the receiving demodulation module sends, and data are deciphered, deinterleaving, separated rate-matched, separate processing such as physical channel mapping.
The major function of modulation, framing sending module 82 is the data after receive channel coding/decoding module is handled through the mapping of encoding, and structure of time slot in accordance with regulations sends to Transmit Receive Unit C after carrying out framing, modulation scrambling.
The major function of signal, receiving demodulation module 83 is received RF Transmit-Receive Unit data from eating dishes without rice or wine to receive, carry out channel estimating, data demodulates, scramble process after, send the data to chnnel coding/decoding module and decipher processing.
According to thought of the present invention, chnnel coding/decoding module is not received high level data in baseband processing unit, and when needing to send special burst, the data division of physical channel need be filled predetermined fixed bit sequence, and the TFCI partial fixing fills 0.When the recipient detects physical channel, at first extract the TFCI part, if judge that TFCI is 0, then extract the information of data division again, the data message that receives is carried out decision process, and the result that will adjudicate and known fixed sequence program compare, the error rate of calculated data part, if this error rate is less than the error rate thresholding of setting, can judge that then the physical channel data that receives is a special burst, the channel decoding module is no longer carried out follow-up decoding processing, and notifies other modules can utilize this special burst that receives to carry out corresponding physical layer control and treatment, as synchronous and power control.If the error rate is higher than the error rate thresholding of setting, judge that then the physical channel data that receives is the flase drop data, it is abandoned, no longer utilize these flase drop data to carry out physical layer control.Fig. 5 and Fig. 6 are a specific embodiment flow process, the handling process when wherein Fig. 5 sends special burst for transmit leg, and Fig. 6 receives and handles the flow process of special burst for the recipient.
Below in conjunction with Fig. 5,, specify the process that sends specialburst based on the transmission form of above-mentioned special burst.
Step 503 ', by normal code multiplexing flow process high level data is handled.
As shown in Figure 6, the process that detects of recipient's reception information is specific as follows:
Channel special burst information behind step 601, the recipient's receiving demodulation;
Step 604 ', the information that receives is not special burst, deciphers processing normally.
Step 607 ', the physical channel data information that receives is not special burst, belongs to the information of flase drop, it is abandoned;
In above-mentioned testing process, for receiving bit sequence and the inconsistent allowed band of predetermined bit sequences, when realizing, reality can judge according to emulation, be recommended as about 20% in the general present realization, but do not limit concrete numerical value.Because after the data that the receive process demodulation process has been the bit information of some quantifications, to carry out hard decision be " 0 " " 1 " bit so general judgment mode is exactly the quantization bit that will receive, known array bit-by-bit with this locality storage compares again, if transmission does not have error code, the sequence that then receives should be just the same with local known array.But, because may there be error code in influences such as channel fading, interference and noise in the transmission course, therefore, error rate thresholding of general setting as long as the error rate of calculating is lower than the error rate thresholding of setting, thinks that promptly the bit sequence that receives is known fixed sequence program.
In addition, shown in Fig. 7 A, a kind of dispensing device of special burst comprises coding map unit 71 and framing transmitting element 72, wherein:
The major function of coding map unit 71 is that the data that receive are encoded, be about to fixed bit sequence that data division is set to predetermined set, TFCI partly is set to zero, and the data division after will handling, TFCI and TPC/SS command word be mapped on the corresponding physical channel, passes on framing transmitting element 72 then;
Framing transmitting element 72 receives the data message after the processing that described coding map unit 71 sends, and structure of time slot in accordance with regulations forms wireless sub-frame with it, modulates to send after scrambling is handled again.
Shown in Fig. 7 B, be the checkout gear block diagram of special burst.This checkout gear comprises receiving element 701, demodulating unit 702, decision unit 703, comparing unit 704, reaches processing unit 705.Concrete testing process is as follows:
After the receiving element 701 reception information, extract the TFCI field and pass on demodulating unit 702 and handle, extract data division and pass on decision unit 703 and handle;
702 pairs of TFCI fields of demodulating unit are deciphered processing, and decoding information are passed on comparing unit 704 handle;
Comparing unit 704 judges whether the TFCI after the decoding is zero, if non-vanishing, then change the channel decoding unit over to and deciphers processing normally; If be zero, bit sequence and predetermined bit sequences after then further will adjudicating compare, and calculate the ratio of different bit numbers and total sequence bits number, i.e. error rate P; Judge error rate P whether within allowed band, promptly whether P is less than error rate thresholding P
ThIf, P＞P
Th, the physical channel data information that then receives is not special burst, belongs to the information of flase drop, and it is abandoned; If P＜P
Th, the physical channel data information that then receives is special burst, no longer carry out follow-up decoding and handle, and notifier processes unit 705 continues to handle;
In above-mentioned testing process,, in reality realizes, be recommended as about 20%, but do not limit concrete numerical value for receiving bit sequence and the inconsistent allowed band of predetermined bit sequences.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (12)
1. the sending method of a special burst is characterized in that: be mapped to the data division in the wireless sub-frame, TFCI and TPC/SS command word on the channel and modulation sends, wherein TFCI partly is set to 0, and data division is filled predetermined bit sequences.
2. the sending method of special burst according to claim 1 is characterized in that, described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
3. the detection method of a special burst is characterized in that, comprises step:
A, from reception information, extract the TFCI field and to its decoding;
Whether the TFCI after B, the judgement decoding is zero, if be zero then continuation step C; Otherwise decipher processing normally;
C, extraction data division are also adjudicated, if reception bit sequence and the inconsistent ratio of predetermined bit sequences are then carried out corresponding subsequent processing according to reception information within allowed band; Otherwise abandon this information.
4. detection method as claimed in claim 3 is characterized in that, described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
5. detection method as claimed in claim 3 is characterized in that, described allowed band is determined according to channel fading, actual interference, noise situations.
6. detection method as claimed in claim 5 is characterized in that, described allowed band is 0% one 20%.
7. the dispensing device of a special burst is characterized in that, comprising:
The coding map unit is used for data division and is set to predetermined bit sequences, TFCI partly is set to 0, and data division, TFCI and TPC/SS command word are mapped on the corresponding physical channel;
The framing transmitting element be used for the data message structure of time slot in accordance with regulations after the described coding map unit processing is formed wireless sub-frame, and modulation sends.
8. dispensing device as claimed in claim 7 is characterized in that, described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
9. the checkout gear of a special burst is characterized in that, comprising:
Receiving element is used for reception information, extracts the TFCI field and passes on demodulating unit, extracts data division and passes on decision unit;
Demodulating unit is used for the TFCI field is deciphered processing, and decoding information is passed on comparing unit;
Decision unit is used for data portion and carries out hard decision, and court verdict is passed on comparing unit;
Comparing unit is used to judge whether the TFCI after the decoding is zero, if non-vanishing, then change the channel decoding unit over to and deciphers processing normally; If be zero, then compare court verdict and predetermined bit sequences, the calculating error rate; Be further used for judging that the error rate is whether within allowed band, if then the notifier processes unit continues to handle; Otherwise abandon information;
Processing unit is used for carrying out corresponding subsequent processing according to special burst information.
10. checkout gear as claimed in claim 9 is characterized in that: described predetermined bit sequences is the fixed bit sequence that is provided with arbitrarily in advance.
11. checkout gear as claimed in claim 9 is characterized in that: described allowed band is determined according to channel fading, actual interference, noise situations.
12. checkout gear as claimed in claim 11 is characterized in that: described allowed band is 0%-20%.
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| CNA2006100897722A CN101106436A (en) | 2006-07-14 | 2006-07-14 | A transmission and detection method for special burst and its device |
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| CNA2006100897722A CN101106436A (en) | 2006-07-14 | 2006-07-14 | A transmission and detection method for special burst and its device |
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| CN101998502A (en) * | 2010-11-29 | 2011-03-30 | 大唐移动通信设备有限公司 | Method, system and equipment for transmitting and receiving command word |
| CN102231890A (en) * | 2011-06-30 | 2011-11-02 | 展讯通信（上海）有限公司 | Special burst detection method and device |
| CN101521903B (en) * | 2008-02-26 | 2012-01-25 | 大唐移动通信设备有限公司 | Method, device and terminal for realizing observed time difference type 1 |
| WO2012155354A1 (en) * | 2011-05-19 | 2012-11-22 | Qualcomm Incorporated | Methods and apparatus for special burst transmissions to reduce uplink and downlink interference for td-scdma systems |
| WO2013075467A1 (en) * | 2011-11-23 | 2013-05-30 | 中兴通讯股份有限公司 | Special burst detection method and system |
| CN103327515A (en) * | 2012-03-23 | 2013-09-25 | 联芯科技有限公司 | Method and device for detecting special burst |
| CN103391560A (en) * | 2012-05-07 | 2013-11-13 | 鼎桥通信技术有限公司 | Special burst detection method and device |
| CN106788811A (en) * | 2016-12-07 | 2017-05-31 | 海能达通信股份有限公司 | A kind of computational methods of digital communication system and the bit error rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101521903B (en) * | 2008-02-26 | 2012-01-25 | 大唐移动通信设备有限公司 | Method, device and terminal for realizing observed time difference type 1 |
| CN101998502B (en) * | 2010-11-29 | 2013-05-15 | 大唐移动通信设备有限公司 | Method, system and equipment for transmitting and receiving command word |
| CN101998502A (en) * | 2010-11-29 | 2011-03-30 | 大唐移动通信设备有限公司 | Method, system and equipment for transmitting and receiving command word |
| WO2012155354A1 (en) * | 2011-05-19 | 2012-11-22 | Qualcomm Incorporated | Methods and apparatus for special burst transmissions to reduce uplink and downlink interference for td-scdma systems |
| CN103548283A (en) * | 2011-05-19 | 2014-01-29 | 高通股份有限公司 | Methods and apparatus for special burst transmissions to reduce uplink and downlink interference for TD-SCDMA systems |
| US20140247814A1 (en) * | 2011-05-19 | 2014-09-04 | Qualcomm Incorporated | Methods and apparatus for special burst transmissions to reduce uplink and downlink interference for td-scdma systems |
| CN102231890B (en) * | 2011-06-30 | 2014-11-05 | 展讯通信（上海）有限公司 | Special burst detection method and device |
| CN102231890A (en) * | 2011-06-30 | 2011-11-02 | 展讯通信（上海）有限公司 | Special burst detection method and device |
| WO2013075467A1 (en) * | 2011-11-23 | 2013-05-30 | 中兴通讯股份有限公司 | Special burst detection method and system |
| CN103138849A (en) * | 2011-11-23 | 2013-06-05 | 中兴通讯股份有限公司 | Method and system for detecting special burst sequence |
| CN103138849B (en) * | 2011-11-23 | 2016-12-07 | 深圳市中兴微电子技术有限公司 | A kind of special burst sequence detecting method and system |
| CN103327515B (en) * | 2012-03-23 | 2016-02-03 | 联芯科技有限公司 | The detection method of special burst and device |
| CN103327515A (en) * | 2012-03-23 | 2013-09-25 | 联芯科技有限公司 | Method and device for detecting special burst |
| CN103391560A (en) * | 2012-05-07 | 2013-11-13 | 鼎桥通信技术有限公司 | Special burst detection method and device |
| CN103391560B (en) * | 2012-05-07 | 2016-03-16 | 鼎桥通信技术有限公司 | Special burst detection method and device |
| CN106788811A (en) * | 2016-12-07 | 2017-05-31 | 海能达通信股份有限公司 | A kind of computational methods of digital communication system and the bit error rate |
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