CN101801014A - Method and device for detecting physical broadcast channel - Google Patents
Method and device for detecting physical broadcast channel Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a device for detecting a physical broadcast channel. The method comprises the following steps: receiving first burst antenna data and first channel evaluation data; decoding and demodulating the first burst antenna data and the first channel evaluation data to obtain a first soft bit; and performing descrambling, channel decoding and verifying on the first soft bit by using four scrambling sections, wherein the four scrambling sections are obtained by dividing scrambling sequences of a cell where user equipment is positioned into the four sections, and if the soft bit passes the verification, the physical broadcast channel is detected. A PBCH channel can be detected when only one Burst is received and the Burst0 is not needed. In the method and the device, the detection of the PBCH only needs one burst, so that the storage space is saved and the processing time is reduced.
Description
Technical field
The present invention relates to communication technical field, particularly the method and apparatus of Physical Broadcast Channel detection.
Background technology
At Long Term Evolution (Long Term Evolution, LTE) in the system, Physical Broadcast Channel (Physicalbroadcast channel, PBCH) Transmission Time Interval (Transmission Time Interval, TTI) be 40ms, each frame sends a burst (Burst), and each frame period 10ms sends, transmitting time is the time (10 subframes are formed a frame, are numbered 0～9) that subframe 0 sends.The content Master Information Block that PBCH carried (Master Information Block, MIB) 24 bits are arranged, add that (Cyclic Redundancy Check, CRC) check information then have 40 bits for the cyclic redundancy check (CRC) of 16 bits, adopt 1/3 convolutional encoding, is 120 bits after the channel convolutional coding, passes through rate-matched (repeated encoding) again, after multiplying each other with the scrambler sequence of 1920 bits to 1920 bits, be distributed to 4 Burst in order, promptly in the PBCH channel of 4 frames.
The detection method of PBCH is collected after neat 4 Burst by the TTI border, carries out inverse process according to cataloged procedure and decodes.Concrete flow process is: the antenna data and the channel estimating number that receive 4Burst, carry out advancing to have more antenna (Multiple Input Multiple Output then more, MIMO) decoding, demodulation, descrambling, channel decoding (separating rate-matched, Viterbi decoding), carry out at last cyclic redundancy check (CRC) (CyclicRedundancy Check, CRC); If CRC check result if the result is 0, then thinks to obtain correct mib information.
For the processing delay of Channel Detection in the more intuitive statement prior art, as shown in Figure 1, the numbering of 0～3 statement Burst of lastrow, establishing T is the time that a TTI data processing needs.The minimum treat time delay is 31ms+T.Maximum processing delay is: 61ms+T, the average treatment time delay is 46ms+T.
The inventor finds the detection technique of existing P BCH, and it is longer to handle time-delay.
Summary of the invention
The method embodiment that Physical Broadcast Channel provided by the present invention detects can be achieved through the following technical solutions:
Receive first burst antenna data and first channel evaluation data;
To described first burst antenna data and first channel evaluation data decipher, demodulation, obtain the first soft bit;
Respectively to the described first soft bit descrambling, channel decoding, verification, described four scrambler sections are equally divided into four sections by the scrambler sequence of sub-district, subscriber equipment place and obtain with four scrambler sections;
If verification is passed through, then detect Physical Broadcast Channel.
The device that a kind of Physical Broadcast Channel detects comprises:
Receiving element is used to receive first burst antenna data and first channel evaluation data;
Soft bit acquiring unit, be used for to described first burst antenna data and first channel evaluation data decipher, demodulation, obtain the first soft bit;
Verification unit is used for four scrambler sections respectively to the described first soft bit descrambling, channel decoding, verification, and described four scrambler sections are equally divided into four sections by the scrambler sequence of sub-district, subscriber equipment place and obtain, if verification is passed through, then detect Physical Broadcast Channel.
Technique scheme has following beneficial effect: receive a Burst and also can carry out the detection of PBCH channel, and need not to depend on Burst0.Therefore, in the present embodiment, the detection of PBCH can only need a burst, thereby can conserve storage reduce the processing time.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is prior art PBCH schematic diagram detection time;
Fig. 2 is an embodiment of the invention method flow schematic diagram;
Fig. 3 is an embodiment of the invention other method schematic flow sheet;
Fig. 4 is prior art PBCH schematic diagram detection time;
Fig. 5 is an embodiment of the invention apparatus structure schematic diagram;
Fig. 6 is another apparatus structure schematic diagram of the embodiment of the invention;
Fig. 7 is an embodiment of the invention apparatus structure schematic diagram again.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The method that following embodiment provides a kind of Physical Broadcast Channel to detect, its schematic flow sheet comprises as shown in Figure 2:
201: receive first burst antenna data and first channel evaluation data.
202: to above-mentioned first burst antenna data and first channel evaluation data decipher, demodulation, obtain the first soft bit.
203: with four scrambler sections respectively to the above-mentioned first soft bit descrambling, channel decoding, verification.
Above-mentioned four scrambler sections are equally divided into four sections by the scrambler sequence of sub-district, subscriber equipment place and obtain.Scrambler sequence can be obtained by subscriber equipment in advance, for example: the scrambler sequence that obtains above-mentioned sub-district according to the cell ID of sub-district, above-mentioned subscriber equipment place.
Particularly, four scrambler sections in the step 203 can number consecutively be 0～3, so the realization of step 203 can for: according to the numbering order use the scrambler section that the above-mentioned first soft bit is carried out descrambling, channel decoding, verification successively.Illustrate: at first the above-mentioned first soft bit is carried out descrambling, channel decoding, verification with the scrambler section that is numbered 0; If the verification failure is then used than the scrambler section of current numbering big 1 above-mentioned soft bit is carried out descrambling, channel decoding, verification.
Particularly, above-mentioned verification comprises: cyclic redundancy check (CRC).If adopt other verification mode to realize that verification also is fine certainly, the embodiment of the invention will not limit this.
204:, then detect Physical Broadcast Channel if verification is passed through.
Further, the method that present embodiment provides can also comprise:
201A: if the verification failure receives second burst antenna data and second channel data estimator;
The title of above-mentioned first burst and second burst is two bursts that successively receive in order to distinguish, and does not represent other the meaning.
202A: to above-mentioned second burst antenna data and second channel data estimator decipher, demodulation, obtain the second soft bit;
203A: merge the above-mentioned first soft bit and the second soft bit obtains the 3rd soft bit;
204A: with new scrambler section the above-mentioned the 3rd soft bit is carried out descrambling, channel decoding, verification, pass through up to verification.
Above-mentioned new scrambler section is made up of the identical scrambler section of burst number that above-mentioned four scrambler Duan Zhongyu receive.
The method that the foregoing description provides can be applicable in the LTE system, executive agent can be the LTE terminal, in the LTE system, the information of 1920 bits that PBCH carried is come scrambling according to 1920 scrambler bits in scrambling, these 1920 scrambler bits all are constant concerning specific sub-district, and every 40ms repeats once.Therefore the scrambler sequence of sub-district can be divided into 4 sections, every section corresponding frame of scrambler.If Burst and this section scrambler correspondence are then thought and have been found frame number.
Therefore, in the present embodiment, a Burst also can detect the PBCH channel, and need not to depend on Burst0.Simultaneously, in the present embodiment, the detection of PBCH can only need a burst, thereby can conserve storage reduce the processing time.
Further, the embodiment of the invention also provides when using a Burst can't detect the PBCH channel, detects the PBCH channel by the number that increases Burst, thereby has further improved the adaptability that present embodiment is used.
The method that following embodiment provides another Physical Broadcast Channel to detect, its schematic flow sheet comprises as shown in Figure 3:
301: the antenna data and the channel evaluation data that receive 1 Burst.
302: antenna data and channel evaluation data to above-mentioned 1 Burst are carried out MIMO decoding, demodulation, obtain 480 soft bits.
303: successively soft bit is carried out descrambling, channel decoding, carries out CRC check with scrambler section Part0～Part3.
For example, in the LTE system, the scrambler sequence of 1920 bits can be divided into 4 sections, be followed successively by Part0～Part3; Use Part0 that bit is carried out unwinding earlier, 480 soft bits behind the descrambling are separated rate-matched (480 to 120 soft bits), Viterbi decoding (120 soft bit to 40 soft bits), bit behind the Viterbi decoding is carried out CRC check, if verification is by then detecting PBCH, the Channel Detection flow process finishes so, otherwise use Part1 that soft bit is carried out descrambling, channel decoding, carries out CRC check, if verification is by then detecting PBCH, the Channel Detection flow process finishes so, the rest may be inferred, if use still verification failure then enter step 304 of Part3.
As shown in Figure 4, the numbering of 0～3 expression Burst of lastrow, if carry out the needed time of data processing at every turn is that (t will be significantly smaller than T to t, because the data volume of handling have only the legacy data amount 1/4), minimum trial 1 time, attempt at most can parsing PBCH 4 times, so minimal time delay is 1ms+t that maximum delay is 1ms+4t.Average delay is 1ms+2.5t.
304: use 2 Burst to carry out verification.
Be specially: resulting 480 the soft bit storage of step 302 can be got off.Receive the data of 1 Burst again, carry out MIMO decoding, twice resulting soft Bit String got up (be 960 soft bits for 480*2 this moment), successively with scrambler section Part0+Part1, Part1+Part2, Part2+Part3, Part3+Part0 carry out descrambling, separate rate-matched, Viterbi decoding, CRC check, if verification is by then detecting PBCH, the Channel Detection flow process finishes so, otherwise enters step 305.
305: use 3 Burst to carry out verification.
Concrete method can refer step 305, the soft bit that string together this moment is 1440 soft bits, use successively the scrambler section as Part0+Part 1+Part2, Part 1+Part2+Part3, Part2+Part3+Part0, Part3+Part0+Part1 carry out descrambling, separate rate-matched, Viterbi decoding, CRC check, if verification is by then detecting PBCH, the Channel Detection flow process finishes so, otherwise enters step 306.
306: use 4 Burst to carry out verification.
Concrete method can refer step 305, the soft bit that string together this moment is 1920 soft bits, successively scrambler section Part0+Part1+Part2+Part3, Part1+Part2+Part3+Part0, Part2+Part3+Part0+Part1, the Part3+Part0+Part1+Part2 of Shi Yonging carry out descrambling, separate rate-matched, Viterbi decoding, CRC check, if verification is by then detecting PBCH, the Channel Detection flow process finishes so.
Find out that from foregoing description the scheme minimal time delay of present embodiment is 1ms+t, maximum delay is 1ms+4t, and average delay is 1ms+2.5t, all has greatly improved than original scheme, has improved the speed that reads PBCH greatly.Because the processing time is fast, can also prolong some portable terminals (for example: stand-by time mobile phone), significantly reduce and switch the stand-by period, reduce start waiting time.Owing to can only need the antenna data of a Burst of storage, significantly reduced demand in addition to memory space.
The device that a kind of Physical Broadcast Channel detects as shown in Figure 5, comprising:
Receiving element 501 is used to receive first burst antenna data and first channel evaluation data;
Soft bit acquiring unit 502, be used for to above-mentioned first burst antenna data and first channel evaluation data decipher, demodulation, obtain the first soft bit;
Further, above-mentioned receiving element 501 also is used for if above-mentioned verification unit 503 verifications failure receives second burst antenna data and second channel data estimator;
Above-mentioned soft bit acquiring unit 502, also be used for to above-mentioned second burst antenna data and second channel data estimator decipher, demodulation, obtain the second soft bit.
As shown in Figure 6, said apparatus can also comprise, merge cells 601 is used to merge the above-mentioned first soft bit and the second soft bit obtains the 3rd soft bit;
Above-mentioned verification unit 503 also is used for new scrambler section the above-mentioned the 3rd soft bit being carried out descrambling, channel decoding, verification, passes through up to verification, and above-mentioned new scrambler section is made up of the identical scrambler section of burst number that above-mentioned four scrambler Duan Zhongyu receive.
Particularly,
Above-mentioned four scrambler segment numbers are 0～3, and above-mentioned verification unit 503 specifically is used for using the scrambler section that the above-mentioned first soft bit is carried out descrambling, channel decoding, verification successively according to the order of numbering.
Particularly, above-mentioned verification unit 503 is used for verification and comprises: be used to adopt the mode of cyclic redundancy check (CRC) to carry out verification.
As shown in Figure 7, said apparatus can also comprise:
Above execution mode just can carry out verification receiving arbitrarily burst, is no longer dependent on 4 bursts, and only need handle and store when data processing and storage a burst, thus the conserve storage minimizing processing time.
The device that present embodiment provides can be the subscriber equipment in the LTE system.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, above-mentioned program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than method and apparatus that Physical Broadcast Channel that the embodiment of the invention provided is detected be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention.
Claims (10)
1. the method that Physical Broadcast Channel detects is characterized in that, comprising:
Receive first burst antenna data and first channel evaluation data;
To described first burst antenna data and first channel evaluation data decipher, demodulation, obtain the first soft bit;
Respectively to the described first soft bit descrambling, channel decoding, verification, described four scrambler sections are equally divided into four sections by the scrambler sequence of sub-district, subscriber equipment place and obtain with four scrambler sections;
If verification is passed through, then detect Physical Broadcast Channel.
2. according to the described method of claim 1, it is characterized in that described method also comprises:
If the verification failure receives second burst antenna data and second channel data estimator;
To described second burst antenna data and second channel data estimator decipher, demodulation, obtain the second soft bit;
Merge the described first soft bit and the second soft bit obtains the 3rd soft bit;
With new scrambler section the described the 3rd soft bit is carried out descrambling, channel decoding, verification, pass through up to verification, described new scrambler section is made up of the identical scrambler section of burst number that described four scrambler Duan Zhongyu receive.
3. according to the described method of claim 1, it is characterized in that described four scrambler section number consecutivelies are 0～3, four scrambler sections of described usefulness are carried out descrambling, channel decoding, verification to the described first soft bit respectively and are comprised:
Order according to numbering uses the scrambler section that the described first soft bit is carried out descrambling, channel decoding, verification successively.
4. according to any described method of claim 1 to 3, it is characterized in that described verification comprises: cyclic redundancy check (CRC).
5. according to any described method of claim 1 to 3, it is characterized in that described method also comprises:
Obtain the scrambler sequence of described sub-district according to the cell ID of sub-district, described subscriber equipment place.
6. the device that Physical Broadcast Channel detects is characterized in that, comprising:
Receiving element is used to receive first burst antenna data and first channel evaluation data;
Soft bit acquiring unit, be used for to described first burst antenna data and first channel evaluation data decipher, demodulation, obtain the first soft bit;
Verification unit is used for four scrambler sections respectively to the described first soft bit descrambling, channel decoding, verification, and described four scrambler sections are equally divided into four sections by the scrambler sequence of sub-district, subscriber equipment place and obtain, if verification is passed through, then detect Physical Broadcast Channel.
7. according to the described device of claim 6, it is characterized in that,
Described receiving element also is used for if described verification unit verification failure receives second burst antenna data and second channel data estimator;
Described soft bit acquiring unit, also be used for to described second burst antenna data and second channel data estimator decipher, demodulation, obtain the second soft bit;
Described device also comprises, merge cells is used to merge the described first soft bit and the second soft bit obtains the 3rd soft bit;
Described verification unit also is used for new scrambler section the described the 3rd soft bit being carried out descrambling, channel decoding, verification, passes through up to verification, and described new scrambler section is made up of the identical scrambler section of burst number that described four scrambler Duan Zhongyu receive.
8. according to the described device of claim 6, it is characterized in that described four scrambler section number consecutivelies are 0～3, described verification unit specifically is used for using the scrambler section that the described first soft bit is carried out descrambling, channel decoding, verification successively according to the order of numbering.
9. according to any described device of claim 6 to 8, it is characterized in that described verification unit specifically is used to adopt the mode of cyclic redundancy check (CRC) to carry out verification.
10. according to any described device of claim 6 to 8, it is characterized in that, also comprise:
The scrambler acquiring unit is used for obtaining according to the cell ID of sub-district, described subscriber equipment place the scrambler sequence of described sub-district.
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Cited By (9)
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| CN102035623A (en) * | 2010-12-21 | 2011-04-27 | 大唐移动通信设备有限公司 | Method and device for confirming system frame number |
| CN102076018A (en) * | 2010-12-22 | 2011-05-25 | 上海华为技术有限公司 | Method and device for detecting physical broadcast channel |
| CN103442355A (en) * | 2013-09-16 | 2013-12-11 | 武汉邮电科学研究院 | Quick soft bit descrambling method used in communication |
| CN103731236A (en) * | 2012-10-15 | 2014-04-16 | 普天信息技术研究院有限公司 | Blind detection method for physical downlink control channel |
| CN105517152A (en) * | 2016-02-02 | 2016-04-20 | 福州瑞芯微电子股份有限公司 | Paging channel receiving method and system in wireless communication system |
| CN109150377A (en) * | 2017-06-16 | 2019-01-04 | 维沃移动通信有限公司 | Sending method, method of reseptance, network side equipment and the terminal device of information |
| CN109756947A (en) * | 2017-11-01 | 2019-05-14 | 普天信息技术有限公司 | The received method of PBCH, terminal, electronic equipment and storage medium |
| CN110890940A (en) * | 2019-11-25 | 2020-03-17 | 展讯通信（上海）有限公司 | Method and device for decoding MIB carried by PBCH, storage medium and terminal |
| CN111614441A (en) * | 2020-05-22 | 2020-09-01 | Oppo广东移动通信有限公司 | Decoding method, device, equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102035623B (en) * | 2010-12-21 | 2013-03-13 | 大唐移动通信设备有限公司 | Method and device for confirming system frame number |
| CN102035623A (en) * | 2010-12-21 | 2011-04-27 | 大唐移动通信设备有限公司 | Method and device for confirming system frame number |
| CN102076018A (en) * | 2010-12-22 | 2011-05-25 | 上海华为技术有限公司 | Method and device for detecting physical broadcast channel |
| CN102076018B (en) * | 2010-12-22 | 2013-08-28 | 上海华为技术有限公司 | Method and device for detecting physical broadcast channel |
| CN103731236B (en) * | 2012-10-15 | 2017-02-01 | 普天信息技术研究院有限公司 | Blind detection method for physical downlink control channel |
| CN103731236A (en) * | 2012-10-15 | 2014-04-16 | 普天信息技术研究院有限公司 | Blind detection method for physical downlink control channel |
| CN103442355A (en) * | 2013-09-16 | 2013-12-11 | 武汉邮电科学研究院 | Quick soft bit descrambling method used in communication |
| CN103442355B (en) * | 2013-09-16 | 2016-06-08 | 武汉邮电科学研究院 | A kind of for the quick de-scrambling method of soft bit in communicating |
| CN105517152A (en) * | 2016-02-02 | 2016-04-20 | 福州瑞芯微电子股份有限公司 | Paging channel receiving method and system in wireless communication system |
| CN105517152B (en) * | 2016-02-02 | 2019-04-16 | 福州瑞芯微电子股份有限公司 | Paging channel reception method and system in wireless communication system |
| CN109150377A (en) * | 2017-06-16 | 2019-01-04 | 维沃移动通信有限公司 | Sending method, method of reseptance, network side equipment and the terminal device of information |
| US12003320B2 (en) | 2017-06-16 | 2024-06-04 | Vivo Mobile Communication Co., Ltd. | Information transmission method with mapping of PBCH reference signal, information reception method, network side device and user equipment |
| CN109756947A (en) * | 2017-11-01 | 2019-05-14 | 普天信息技术有限公司 | The received method of PBCH, terminal, electronic equipment and storage medium |
| CN109756947B (en) * | 2017-11-01 | 2021-08-06 | 普天信息技术有限公司 | PBCH (physical broadcast channel) receiving method, terminal, electronic equipment and storage medium |
| CN110890940A (en) * | 2019-11-25 | 2020-03-17 | 展讯通信（上海）有限公司 | Method and device for decoding MIB carried by PBCH, storage medium and terminal |
| CN110890940B (en) * | 2019-11-25 | 2022-04-12 | 展讯通信（上海）有限公司 | Method and device for decoding MIB carried by PBCH, storage medium and terminal |
| CN111614441A (en) * | 2020-05-22 | 2020-09-01 | Oppo广东移动通信有限公司 | Decoding method, device, equipment and storage medium |
| CN111614441B (en) * | 2020-05-22 | 2023-04-11 | Oppo广东移动通信有限公司 | Decoding method, device, equipment and storage medium |
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Application publication date: 20100811 |