CN102170693A - Time control system and control method based on Beidou navigation satellite system - Google Patents
Time control system and control method based on Beidou navigation satellite system Download PDFInfo
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- CN102170693A CN102170693A CN2010102150170A CN201010215017A CN102170693A CN 102170693 A CN102170693 A CN 102170693A CN 2010102150170 A CN2010102150170 A CN 2010102150170A CN 201010215017 A CN201010215017 A CN 201010215017A CN 102170693 A CN102170693 A CN 102170693A
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- time service
- big dipper
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Abstract
A Time control system based on Beidou navigation satellite system is used for clock calibration to BBU. The Time control system comprises a main receiving unit, at least one auxiliary receiving unit, a detecting unit and a selecting unit. The main receiving unit is used for receiving a first Beidou time service light signal from an external base station of the BBU; at least one auxiliary receiving unit is used for receiving a second Beidou time service light signal from the external base station of the BBU; the detecting unit is used for detecting whether the main receiving unit receives the first Beidou time service light signal; and the selecting unit is used for selecting the first Beidou time service light signal or the second Beidou time service light signal to be outputted to the BBU according to the detecting result. The Time control system decides to output the corresponding Beidou time service signal to the BBU by receiving the second Beidou time service light signal and detecting the state of the first Beidou time service light signal with the detecting unit, so as to improve the reliability of the Beidou time service system of the BBU. The invention also provides a Time control method based on the Beidou navigation satellite system.
Description
Technical field
The present invention relates to a kind of Service of Timing, relate in particular to a kind of time service control system and control method that is used for indoor Base Band Unit based on Beidou satellite navigation system.
Background technology
At present, adopt TD SDMA (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) indoor baseband processing unit (Building Base band unit, BBU) clock utilizes Big Dipper location (Global Position System, the Big Dipper) time dissemination system to carry out synchronously with calibration usually.Generally, the Big Dipper time dissemination system of BBU comprises that the main receiving element an of this locality is in order to obtain Big Dipper time signal.
Yet,, influence the reliability of Big Dipper time dissemination system simultaneously if after losing as Big Dipper time signal unusually appears in the Big Dipper time signal that main receiving element obtains, can cause the inefficacy of Big Dipper time dissemination system and the BBU clock can't be calibrated.
Summary of the invention
In view of this, be necessary to provide a kind of time service control system and control method that can improve the time service reliability.
A kind of time service control system based on Beidou satellite navigation system, it is used for an indoor Base Band Unit is carried out clock alignment.Described time service control system comprises a main receiving element, at least one auxiliary reception unit, a detecting unit and a selected cell.Described main receiving element is used for receiving one first Big Dipper time service light signal from the external base station of described indoor Base Band Unit.Described at least one auxiliary reception unit is used for receiving one second Big Dipper time service light signal from the external base station of described indoor Base Band Unit.Described detecting unit is used to detect described main receiving element and whether receives described first Big Dipper time service light signal.Described selected cell be used for according to the testing result of described detecting unit select described first Big Dipper time service light signal/second Big Dipper time service light signal provide to described indoor Base Band Unit to carry out clock alignment.
A kind of time service control method based on Beidou satellite navigation system, it is used for an indoor Base Band Unit is carried out clock alignment, and described time service control method comprises:
Receive one first Big Dipper time service light signal from the outside of described indoor Base Band Unit;
Receive one second Big Dipper time service light signal from the outside of described indoor Base Band Unit;
Detect described first Big Dipper time service light signal and whether access to described main receiving element;
According to testing result select described first Big Dipper time service light signal/second Big Dipper time service light signal provide to described indoor Base Band Unit to carry out clock alignment.
Compared with prior art, time service control system and control method based on Beidou satellite navigation system provided by the invention receives second Big Dipper time service light signal by the auxiliary reception unit is set, and the state that utilizes detecting unit to detect first Big Dipper time service light signal that main receiving element receives determines to export corresponding first Big Dipper time service light signal/second Big Dipper time service light signal so that indoor Base Band Unit is carried out clock alignment, thereby improved the reliability of the Big Dipper time dissemination system of BBU.
Description of drawings
Fig. 1 is the module diagram based on the time service control system of Beidou satellite navigation system of embodiment of the present invention.
Fig. 2 is the control method flow chart based on the time service control system of Beidou satellite navigation system of embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 1, the time service control system 100 that the present invention is based on Beidou satellite navigation system is used for that (Building Base band unit, BBU) 200 carry out clock alignment to an indoor baseband processing unit.This time service control system 100 comprises a main receiving element 20,40, one detecting units 60 in auxiliary reception unit and a selected cell 80.The number that is appreciated that auxiliary reception unit 40 can be set according to need.
Described main receiving element 20 is used for receiving one first Big Dipper time service light signal S1 from the external base station of BBU200.In the present embodiment, main receiving element 20 is a photoelectric conversion unit.Main receiving element 20 is one first Big Dipper time service signal of telecommunication S1 ' with described first Big Dipper time service light signal S1 through opto-electronic conversion.
In the present embodiment, described auxiliary reception unit 40 is a photoelectric conversion unit.Auxiliary reception unit 40 from the external base station of indoor Base Band Unit 200 receive one second Big Dipper time service light signal S2 and second Big Dipper time service light signal S2 that will receive to carry out opto-electronic conversion be one second Big Dipper time service signal of telecommunication S2 '.
Be appreciated that main receiving element 20 and auxiliary reception unit 40 can receive Big Dipper time service light signal S1, S2 from the same base station of the outside of BBU200, also can receive Big Dipper time service light signal S1, S2 from the different base station of the outside of BBU200.
Whether the state that described detecting unit 60 is used to detect first Big Dipper time service signal of telecommunication S1 ' that main receiving element 20 receives is normal.In the present embodiment, whether first Big Dipper time service signal of telecommunication S1 ' that detecting unit 60 is used to detect reception loses.
Described selected cell 80 comprises a switch element 82 and a control unit 84.Described switch element 82 electrically connects and receives first Big Dipper time service signal of telecommunication S1 ' and second Big Dipper time service signal of telecommunication S2 ' with main receiving element 20 and auxiliary reception unit 40 respectively.Described control unit 84 according to the testing result of detecting unit 60 come control switch unit 82 output first Big Dipper time service signal of telecommunication S1 '/second Big Dipper time service signal of telecommunication S2 ' to BBU200 to carry out clock alignment.
In the present embodiment, if first Big Dipper time service signal of telecommunication S1 ' that detecting unit 60 detects be a lost condition, then control unit 84 control switch unit 82 export second Big Dipper time service signal of telecommunication S2 ' to BBU200 to carry out clock alignment.If detecting unit 60 detects the normal condition that is received as of first Big Dipper time service signal of telecommunication S1 ', then control unit 84 control switch unit 82 outputs first Big Dipper time service signal of telecommunication S1 ' to BBU200 to carry out clock alignment.
Be appreciated that, for the laser propagation effect that makes time service control device 100 signals and BBU200 better, a lightning protection unit is set to prevent the damage of thunder and lightning between main receiving element 20 and switch element 82, guarantees that signal better transmits time service control device 100 and BBU200.
Be appreciated that, time signal for the Big Dipper time dissemination system of better utilization base station, should also comprise an electrooptic switching element 90 based on the time service control device 100 of Beidou satellite navigation system, described electrooptic switching element 90 receives first Big Dipper time service signal of telecommunication S1 '/second Big Dipper time service signal of telecommunication S2 ' of switch element 82 outputs of selected cells 80, and transfers to external base station carry out clock alignment to offer outside other base stations after electric light is converted to one or more first Big Dipper time service light signals/second Big Dipper time service light signal.
See also Fig. 2, the control method of the time service control system of embodiment of the present invention is used for utilizing Big Dipper time dissemination system to carry out clock alignment to BBU200, and described time service control method may further comprise the steps:
S110: receive first Big Dipper time service light signal from the external base station of BBU;
S120: receive second Big Dipper time service light signal from the external base station of BBU;
S130: it is first Big Dipper time service signal of telecommunication that first Big Dipper time service light signal is carried out opto-electronic conversion;
S140: it is second Big Dipper time service signal of telecommunication that second Big Dipper time service light signal is carried out opto-electronic conversion;
S150: detect first Big Dipper time service signal of telecommunication and whether lose, if, then enter step S170, if not, then enter step S160.
S160: select first Big Dipper time service signal of telecommunication to export BBU to so that BBU is carried out clock alignment;
S170: with first Big Dipper time service electrical signal conversion is that one or more first Big Dipper time service light signals export the external base station of BBU to carry out clock alignment;
S180: select second Big Dipper time service signal of telecommunication to export BBU to so that BBU is carried out clock alignment.
S190: with second Big Dipper time service electrical signal conversion is that one or more second Big Dipper time service light signals export the external base station of BBU to carry out clock alignment;
In step S110, utilize main receiving element 20 to receive first Big Dipper time service light signal S1 from the external base station of BBU.
In step S120, utilize auxiliary reception unit 40 to receive second Big Dipper time service light signal S2 from the external base station of BBU200.
In step S130, utilizing main receiving element 20 that first Big Dipper time service light signal is carried out opto-electronic conversion is first Big Dipper time service signal of telecommunication S1 '.
In step S140, utilizing auxiliary reception unit 40 that second Big Dipper time service light signal S2 is carried out opto-electronic conversion is second Big Dipper time service signal of telecommunication S2 '.
In step S150, whether first Big Dipper time service signal of telecommunication S1 ' that utilizes detecting unit 60 to detect main receiving element 20 receptions loses, if it is normal that detecting unit 60 detects the accepting state of first Big Dipper time service signal of telecommunication S1 ', then enter step S160, if first Big Dipper time service signal of telecommunication S1 ' loses, then enter step S170.
In step S160, utilize control unit 84 control switch unit 82 output first Big Dipper time service signal of telecommunication S1 ' to BBU200 to carry out clock alignment.
In step S170, utilize electrooptic switching element 90 that first Big Dipper time service signal of telecommunication S1 is carried out electric light and be converted to one or more light signals, and the corresponding one or more external base station that export BBU200 to provide the clock alignment signal.
In step S180, utilize control unit 84 control switch unit 82 output second Big Dipper time service signal of telecommunication S2 ' to BBU200 to carry out clock alignment.
In step S190, utilize electrooptic switching element 90 that second Big Dipper time service signal of telecommunication S1 is carried out electric light and be converted to one or more light signals, and the corresponding one or more external base station that export BBU200 to provide the clock alignment signal.
Be appreciated that step S110 and step S120 can exchange, step S130 and step S140 can exchange, and step S120 and step S130 can exchange.
Described time service control system and control method provide second Big Dipper time service light signal by the auxiliary reception unit is set, and the state that utilizes detecting unit to detect first Big Dipper time service light signal that main receiving element receives determines the corresponding Big Dipper time signal of output to BBU, thus the reliability of the Big Dipper time dissemination system of raising BBU.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection range that all should belong to claim of the present invention with distortion.
Claims (12)
1. time service control system based on Beidou satellite navigation system, it is used for an indoor Base Band Unit is carried out clock alignment, and described time service control system comprises:
A main receiving element, it is used for receiving one first Big Dipper time service light signal from the external base station of described indoor Base Band Unit;
At least one auxiliary reception unit, it is used for receiving one second Big Dipper time service light signal from the external base station of described indoor Base Band Unit;
A detecting unit, it is used to detect described main receiving element and whether receives described first Big Dipper time service light signal;
A selected cell, it is used for providing clock to described indoor Base Band Unit to calibrate according to first Big Dipper time service light signal/second Big Dipper time service light signal that the testing result of described detecting unit is selected to be received.
2. time service control system as claimed in claim 1, it is characterized in that, described main receiving element is a photoelectric conversion unit, and to carry out opto-electronic conversion be one first Big Dipper time service signal of telecommunication to described main receiving element and export described selected cell to described first Big Dipper time service light signal that is received.
3. time service control system as claimed in claim 2, it is characterized in that, described auxiliary reception unit is a photoelectric conversion unit, and described auxiliary reception unit is one second Big Dipper time service signal of telecommunication and exports described selected cell to through opto-electronic conversion described second Big Dipper time service light signal that is received.
4. time service control system as claimed in claim 3, it is characterized in that, described selected cell comprises a switch element and a control unit, described switch element receives first Big Dipper time service signal of telecommunication of described main receiving element output and second Big Dipper time service signal of telecommunication of described auxiliary reception unit output respectively, if described checkout gear detects described first Big Dipper time service signal of telecommunication and loses, then described control unit control described switch element export described second Big Dipper time service signal of telecommunication to described indoor Base Band Unit to carry out clock alignment.
5. time service control system as claimed in claim 4, it is characterized in that, to receive the state of described first Big Dipper time service signal of telecommunication normal if described checkout gear detects described main receiving element, and then described control unit is controlled described switch element and exported described first Big Dipper time service signal of telecommunication to described indoor Base Band Unit to carry out clock alignment.
6. time service control system as claimed in claim 4, it is characterized in that, described time service control system based on Beidou satellite navigation system also comprises an electrooptic switching element, and described electrooptic switching element is used to receive first Big Dipper time service signal of telecommunication/second Big Dipper time service signal of telecommunication of described switch element output and export external base station to carry out the clock alignment of external base station after electric light is converted to one or more first Big Dipper time service light signals/second Big Dipper time service light signal.
7. time service control method based on Beidou satellite navigation system, it is used for an indoor Base Band Unit is carried out clock alignment, and described time service control method comprises:
Receive one first Big Dipper time service light signal from the external base station of described indoor Base Band Unit;
Receive one second Big Dipper time service light signal from the external base station of described indoor Base Band Unit;
Detect described first Big Dipper time service light signal and whether access to described main receiving element;
First Big Dipper time service light signal/second Big Dipper time service light signal of selecting to be received according to testing result provide to described indoor Base Band Unit to carry out clock alignment.
8. time service control method as claimed in claim 7 is characterized in that, may further comprise the steps after the step that receives described first Big Dipper time service light signal: it is one first Big Dipper time service signal of telecommunication that described first Big Dipper time service light signal is carried out opto-electronic conversion.
9. time service control method as claimed in claim 7, it is characterized in that further may further comprise the steps: it is one second Big Dipper time service signal of telecommunication that described second Big Dipper time service light signal is carried out opto-electronic conversion after the step that receives described second Big Dipper time service light signal.
10. time service control method as claimed in claim 9, it is characterized in that, further comprising the steps of in selecting step: as, then to export described second Big Dipper time service signal of telecommunication to described indoor Base Band Unit to carry out clock alignment if described first Big Dipper time service signal of telecommunication that is received is lost.
11. time service control method as claimed in claim 10, it is characterized in that, further comprising the steps of in selecting step: as, then to export described first Big Dipper time service signal of telecommunication to described indoor Base Band Unit to carry out clock alignment if described first Big Dipper time service signal of telecommunication that is received is normal.
12. time service control method as claimed in claim 11, it is characterized in that, further comprising the steps of after the described selection step: as will to select first Big Dipper time service signal of telecommunication/second Big Dipper time service signal of telecommunication of output and after electric light is converted to one or more first Big Dipper time service light signals/second Big Dipper time service light signal, export external base station to carry out the clock alignment of external base station.
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| CN2010102150170A CN102170693A (en) | 2010-07-01 | 2010-07-01 | Time control system and control method based on Beidou navigation satellite system |
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| CN2010102150170A CN102170693A (en) | 2010-07-01 | 2010-07-01 | Time control system and control method based on Beidou navigation satellite system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1516375A (en) * | 2003-01-06 | 2004-07-28 | 华为技术有限公司 | Time service synchronous device, system and method |
| CN2836382Y (en) * | 2005-09-09 | 2006-11-08 | 华为技术有限公司 | Baseband unit of distributed base station |
| CN101251587A (en) * | 2008-02-28 | 2008-08-27 | 江苏北斗科技有限公司 | Satellite navigation system and GPS bimodule time service device |
| CN201388192Y (en) * | 2009-03-17 | 2010-01-20 | 张建城 | Big Dipper multi-mode time service receiving device |
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2010
- 2010-07-01 CN CN2010102150170A patent/CN102170693A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1516375A (en) * | 2003-01-06 | 2004-07-28 | 华为技术有限公司 | Time service synchronous device, system and method |
| CN2836382Y (en) * | 2005-09-09 | 2006-11-08 | 华为技术有限公司 | Baseband unit of distributed base station |
| CN101251587A (en) * | 2008-02-28 | 2008-08-27 | 江苏北斗科技有限公司 | Satellite navigation system and GPS bimodule time service device |
| CN201388192Y (en) * | 2009-03-17 | 2010-01-20 | 张建城 | Big Dipper multi-mode time service receiving device |
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Application publication date: 20110831 |