CN106851817A - A kind of high-accuracy clock synchronization method between base station - Google Patents
A kind of high-accuracy clock synchronization method between base station Download PDFInfo
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- CN106851817A CN106851817A CN201710089619.8A CN201710089619A CN106851817A CN 106851817 A CN106851817 A CN 106851817A CN 201710089619 A CN201710089619 A CN 201710089619A CN 106851817 A CN106851817 A CN 106851817A
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- Prior art keywords
- base station
- wireless signal
- clock
- tmbb
- tmaa
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
Abstract
The present invention discloses the high-accuracy clock synchronization method between a kind of base station, the structure setting of base station is the structure for including wireless signal phase measurement module and wireless communication module by the method, and, by mutually sending wireless signal between two base stations and recording moment Tmaa, Tmba, Tmab and Tmbb for receiving signal moment, and then the clock difference between two wireless signal phase measurement modules of base station is can obtain, according to clock difference so that two time synchronizeds of base station；The method is easy and effective, and in the case where that need not know two wireless signal delivery times of the communication module of base station, you can it is effectively measuring go out base station between clock difference, the high precision clock synchronization between base station is realized, with huge application value.
Description
Technical field
The present invention relates to wireless location communication technical field, and in particular to the high precision clock synchronization side between a kind of base station
Method.
Background technology
At present, under many traffic scenes, positioning scene, clock synchronization accuracy is very high between requiring distinct device；It is no
Then cause the utilization rate of time slot low, big system time error and multiple equipment letter is introduced when calculating wireless signal flying distance
Problem etc. is interfered between number.Flying speed is 300 meters of every microsecond to wireless signal in the air, in order to reach the positioning accurate in 1 meter
Degree, the time error of equipment room must be nanosecond and following.And the clock synchronization mode that in the market is used is typically also base station
Broadcast time service synchronization etc..Not only high cost and precision does not reach requirement.
The content of the invention
The above-mentioned problems in the prior art is directed to, it is an object of the invention to provide the high accuracy between a kind of base station
Clock synchronizing method, the method is easy and effective, and eliminate to the full extent different base station different time send cause
Delay time error, realize the clock synchronization of high accuracy nanosecond.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of high precision clock synchronization between base station is provided
Method, each base station is configured to it by it includes wireless signal phase measurement module and wireless communication module, and is surveyed without phase of line
The distance between amount module and wireless communication module are less than 10cm and keep fixed；Specific method includes：
S1：The wireless communication module of first base station at a time sends wireless signal to the second base station, and records respectively
When the wireless signal phase detecting module of first base station and the wireless signal phase detecting module of the second base station receive the signal
Clock is Tmaa and Tmba；
S2：The wireless communication module of the second base station sends wireless signal to first base station at an other moment, and remembers respectively
When the wireless signal phase detecting module of the wireless signal phase detecting module and first base station of recording the second base station receives the signal
Clock be Tmab and Tmbb；
S3：According to Tmaa, Tmba, Tmab and Tmbb for being obtained in step S1 and S2, the wireless of first base station is calculated
With the clock difference △ Tab between the wireless signal phase detecting module of the second base station between signal phase detection module；
Wherein, △ Tab=[(Tmba-Tmaa)-(Tmab-Tmbb)]/2；
S4：Server is calibrated according to the clock difference to the clock of base station so that the clock of different base station is realized high-precision
Degree is synchronous.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement：
Also include step S5：According to Tmaa, Tmba, Tmab and Tmbb for being obtained in step S1 and S2, the first base is calculated
Stand the signal airborne hours Td produced with the second base distance between sites, further according to signal airborne hours Td between base station
Clock synchronously verified；
Wherein, Td=[(Tmba-Tmaa)+(Tmab-Tmbb)]/2.
Beneficial effects of the present invention are：
1) be configured to for the structure of base station to include wireless signal measurement module and wireless communication module simultaneously by the present invention so that
High-accuracy clock synchronization method between base station of the present invention simply can be realized efficiently.
2) present invention is to include wireless signal phase measurement module and wireless communication module by by the structure setting of base station
Structure, also, by between two base stations mutually send wireless signal and record receive signal moment moment Tmaa,
Tmba, Tmab and Tmbb, and then the clock difference between two wireless signal phase measurement modules of base station is can obtain, according to clock
Official post obtains two time synchronizeds of base station；The method is easy and effective, it is contemplated that the influence of distance difference between base station, and need not
In the case of knowing two wireless signal delivery times of the communication module of base station, you can it is effectively measuring go out base station between clock
Difference, realizes the high precision clock synchronization between base station, with huge application value.
Brief description of the drawings
Fig. 1 is the structural principle block diagram of base station of the invention.
Specific embodiment
Principle of the invention and feature are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
Referring to Fig. 1, Fig. 1 is the structural principle block diagram of base station of the invention, it can be seen that be designed with base station of the invention
One wireless signal phase measurement module and wireless communication module, due to the wireless signal phase measurement module and nothing of same base station
Line communication module can be looked at as a 0 or constant value Tx apart from close and fixation, two distances of intermodule；The base station
Structure in, the wireless communication module being located in terminal in the prior art is arranged in base station, and the wireless communication module
It is close with the distance between wireless signal phase measurement module, generally less than 10cm, and keep fixing, it is of the invention
Excellent basis is established in the realization of high-accuracy clock synchronization method.
According to one embodiment of the application, on the basis of the architecture of base station that the present invention is innovated, between its base station
High-accuracy clock synchronization method is specially：
S1：The wireless communication module of base station A sends a specific signal at the Tat moment, at the same this moment base station A and
The moment of the wireless signal phase measurement module of B is designated as Tar and Tbr；
S2：When the wireless signal phase measurement module inspection of base station A and B receives this signal, the respective moment is recorded
It is Tmaa, Tmba；
Wherein, Tmba=Tat+ (the signal flight time Td in the air that distance is produced between base station A, B)+(base station B wireless communications
Time difference △ T1 number between phase measurement module and base station A wireless communication modules), △ T1=Tbr-Tat；
Tmaa=Tat+ (is produced by distance between the wireless signal phase measurement module and wireless communication module inside the A of base station
Signal airborne hours Tx)+(time between wireless signal phase measurement module and wireless communication module inside the A of base station
Difference △ T2), △ T2=Tar-Tat；
Tmba=Tat+Td+Tbr-Tat；(1)
Tmaa=Tat+Tx+Tar-Tat；(2)
Tmba-Tmaa=(Td-Tx)+(Tbr-Tar)；(5)
S3：The wireless communication module of base station B sends a specific signal at the Tbt ' moment, while this moment base station A
Moment with the wireless signal phase measurement module of B is designated as Tar ' and Tbr '；
S4：The wireless signal phase measurement module of base station A and B records the respective moment when receiving this signal
Tmab、Tmbb；
Wherein, Tmab=Tbt '+(the signal airborne hours Td that distance is produced between base station A, B)+(base station A wireless communications
Time difference △ T1 ' number between phase measurement module and base station B wireless communication modules), △ T1 '=Tar '-Tbt '；
Tmbb=Tbt '+(the signal airborne hours Tx that base station B inside two intermodules distance is produced)+(inside the B of base station
The time difference △ T2 ' of two intermodules), △ T2 '=Tbr '-Tbt '；
Tmab=Tbt '+Td+Tar '-Tbt '；(3)
Tmbb=Tbt '+Tx+Tbr '-Tbt '；(4)
Tmab-Tmbb=(Td-Tx)+(Tar '-Tbr ')；(6)
S5:(Tbr-Tar)=△ Tab are made, (Tar '-Tbr ')=- △ Tab, △ Tab are surveyed for base station A, B without phase of line
Clock difference between amount module；
(5)-(6)：(Tmba-Tmaa)-(Tmab-Tmbb)=[(Td-Tx)+△ Tab]-[(Td-Tx)-△ Tab]=2*
△Tab；
：△ Tab=[(Tmba-Tmaa)-(Tmab-Tmbb)]/2.
S6：Server according to the clock difference △ Tab between the wireless phase measurement module of base station A, B, to base station A and base station
B completes high precision clock synchronization.
According to one embodiment of the application, on the basis of above-mentioned technical proposal, present invention additionally comprises step S7：According to step
Tmaa, Tmba, Tmab and the Tmbb obtained in rapid S1 and S2, are calculated
The signal airborne hours Td that first base station is produced with the second base distance between sites, during further according to signal airflight
Between Td the clock between base station is synchronously verified；Specially：
(5)+(6)：
(Tmba-Tmaa)+(Tmab-Tmbb)=[(Td-Tx)+△ Tab]+[(Td-Tx)-△ Tab]=2* (Td+Tx)；
：Td+Tx=[(Tmba-Tmaa)+(Tmab-Tmbb)]/2；
Because Tx is a fixed value or can be zero, can first be set to 0 and facilitate follow-up description, if practical application be can not ignore
When measure fixed value, also can by it is front and rear twice measurement subtract each other observation variable quantity eliminate measurement Tx occurrences way.
Under normal circumstances, Td should be constant and with specific two base station placement distance is, when repeatedly measurement is obtained
Multigroup Td when, if repeatedly results contrast or actual range compares and between specific base station, during more than error threshold, can be used to report
Alert prompt system measurement has error, and then whether whether normal or this base station is moved in itself to monitor this system, also may be used in addition
For base station to the real time distance of another base station movement.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (2)
1. the high-accuracy clock synchronization method between a kind of base station, it is characterized in that, each base station is configured into it includes wireless communication
Number phase measurement module and wireless communication module, and the distance between wireless phase measurement module and wireless communication module be less than
10cm simultaneously keeps fixed；Specific method includes：
S1：The wireless communication module of first base station at a time sends wireless signal to the second base station, and records first respectively
The wireless signal phase detecting module of base station and the wireless signal phase detecting module of the second base station receive the clock during signal
It is Tmaa and Tmba；
S2：The wireless communication module of the second base station sends wireless signal to first base station at an other moment, and records the respectively
When the wireless signal phase detecting module of two base stations and the wireless signal phase detecting module of first base station receive the signal when
Clock is Tmab and Tmbb；
S3：According to Tmaa, Tmba, Tmab and Tmbb for being obtained in step S1 and S2, the wireless signal of first base station is calculated
With the clock difference △ Tab between the wireless signal phase detecting module of the second base station between phase detecting module；
Wherein, △ Tab=[(Tmba-Tmaa)-(Tmab-Tmbb)]/2；
S4：Server is calibrated according to the clock difference to the clock of base station so that the clock of different base station realizes that high accuracy is same
Step.
2. the high-accuracy clock synchronization method between base station according to claim 1, it is characterized in that, also including step S5：
S5：According to Tmaa, Tmba, Tmab and Tmbb for being obtained in step S1 and S2, it is calculated between first base station and the second base station
The signal airborne hours Td that distance is produced, is synchronously carried out further according to signal airborne hours Td to the clock between base station
Verification；
Wherein, Td=[(Tmba-Tmaa)+(Tmab-Tmbb)]/2.
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| CN201710089619.8A CN106851817A (en) | 2017-02-20 | 2017-02-20 | A kind of high-accuracy clock synchronization method between base station |
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| CN201710089619.8A CN106851817A (en) | 2017-02-20 | 2017-02-20 | A kind of high-accuracy clock synchronization method between base station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109298428A (en) * | 2018-11-16 | 2019-02-01 | 杭州隅千象科技有限公司 | More TOF depth information acquisition synchronous method and system |
| CN112738878A (en) * | 2020-12-24 | 2021-04-30 | 北京无线电计量测试研究所 | Wireless time synchronization method and system |
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| CN106027193A (en) * | 2016-07-07 | 2016-10-12 | 广州市国飞信息科技有限公司 | Clock synchronization method, module, equipment and system for network timing system |
| CN106028438A (en) * | 2016-05-18 | 2016-10-12 | 北京永安信通科技有限公司 | Method, device and system for base station time synchronization algorithm |
| CN106301745A (en) * | 2015-05-22 | 2017-01-04 | 中兴通讯股份有限公司 | The method and device of time synchronized between main control board and slave control board |
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| CN104918319A (en) * | 2014-03-13 | 2015-09-16 | 北方工业大学 | Clock synchronization simplified information exchange method applied to wireless sensor network |
| CN106301745A (en) * | 2015-05-22 | 2017-01-04 | 中兴通讯股份有限公司 | The method and device of time synchronized between main control board and slave control board |
| CN106028438A (en) * | 2016-05-18 | 2016-10-12 | 北京永安信通科技有限公司 | Method, device and system for base station time synchronization algorithm |
| CN106027193A (en) * | 2016-07-07 | 2016-10-12 | 广州市国飞信息科技有限公司 | Clock synchronization method, module, equipment and system for network timing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109298428A (en) * | 2018-11-16 | 2019-02-01 | 杭州隅千象科技有限公司 | More TOF depth information acquisition synchronous method and system |
| CN112738878A (en) * | 2020-12-24 | 2021-04-30 | 北京无线电计量测试研究所 | Wireless time synchronization method and system |
| CN112738878B (en) * | 2020-12-24 | 2022-11-22 | 北京无线电计量测试研究所 | Wireless time synchronization method and system |
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