CN1633043A - Free space optical communication system and transmission power control method thereof - Google Patents
Free space optical communication system and transmission power control method thereof Download PDFInfo
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- CN1633043A CN1633043A CNA2004100522120A CN200410052212A CN1633043A CN 1633043 A CN1633043 A CN 1633043A CN A2004100522120 A CNA2004100522120 A CN A2004100522120A CN 200410052212 A CN200410052212 A CN 200410052212A CN 1633043 A CN1633043 A CN 1633043A
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Abstract
This invention relates to a free space light communication system including a first end system and a second end system, the first includes serial first network management device, a first chip, a first transmission power control device and a first transmission module, the second end system includes orderly serial second receive module, second chip and a second network management device. This invented system finishes judgment to signal powers by chips and decides the transmitted regulated laser transmission power based on outside environmental variance.
Description
[technical field]
The present invention relates to the control method of a kind of data communication system and transmitted power thereof, relate in particular to a kind of free space optical communication (Free Space Optics, FSO) control method of system and transmitted power thereof.
[background technology]
The legacy communications system that connects two or more places with physical circuit or cable is subject in the application of relative low speed, low capacity usually, and for overcoming these defectives, in recent years, the system of exploitation has used optical fiber.Yet optical fiber still requires to use physical cables to connect.For addressing this problem, developed the system that utilizes free space to launch the light beam of one or more modulating datas.Use the system of this light beam to compare and traditional improved data rate and data capacity greatly based on wired system, up to per second 10G byte, simultaneously, avoided in traditional communication system, laid optical cable with the spent infrastructure cost in each place in the physical connection system.
Free space optical communication technology be a kind of based on the optical transmission mode, adopt the Radio Transmission Technology of infrared laser carrying high speed signal, it is a carrier with laser, is medium with the air, realizes connection with the mode of point-to-point or point-to-multipoint.
Free-space optical communication system is to utilize laser transmission signals aloft, and the laser that transmits in air can be subjected to the influence of atmosphere more or less and cause the decay of energy, and its attenuation is relevant with air quality.When weather is sunny, when visibility was high, the attenuation of laser was little; During as rain, snow, mist or sandstorm, the flight visibility step-down, the attenuation of laser increases.In addition, if the laser signal that the receiving terminal of free-space optical communication system receives is too strong, can make receiving circuit saturated and cause error code or communication disruption; If the laser signal that receives too a little less than, be lower than the sensitivity of receiving circuit, also can cause error code or communication disruption.
For the laser power size appropriateness that the receiving terminal that guarantees free-space optical communication system receives, the free-space optical communication system of prior art generally all is provided with the Laser emission power control more than two grades, and the laser power that different gears send varies in size.Can suitable gear be set according to the weather condition far and near or at that time of the two ends distance of free-space optical communication system.When weather visibility was higher, the laser power that the receiving terminal of free-space optical communication system receives will be stronger, and just require the Laser emission power setting at lower gear this moment; When weather visibility was low, the laser power that the receiving terminal of free-space optical communication system receives will be lower, and just require the Laser emission power setting at higher gear this moment.The switching of above-mentioned Laser emission power gear must artificially in time change, otherwise error code will occur, causes communication disruption, and troublesome poeration is lost time.
[summary of the invention]
For overcome in the prior art free-space optical communication system must the people defective of Laser emission power for a change, the invention provides a kind of free-space optical communication system of the Laser emission power that automaticallyes switch.
The transmitting terminal system that the present invention also provides a kind of above-mentioned free-space optical communication system to adopt.
The receiving terminal system that the present invention also provides a kind of above-mentioned free-space optical communication system to adopt.
The present invention also provides a kind of control method of transmitted power of free-space optical communication system.
The technical scheme of technical solution problem of the present invention is: a kind of free-space optical communication system is provided, comprise first end system and second end system, this first end system comprises first network management device of serial connection successively, first chip, first transmission control device and first sending module, second end system comprises second receiver module of serial connection successively, second chip and second network management device, receive the signal of first sending module transmission when second receiver module after, sending signal to second chip judges, second chip sends to second network management device with judged result, second network management device sends to first chip with this judged result by first network management device, this first chip is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by first transmission control device, send out the signal of corresponding power at last by first sending module.
The present invention also provides a kind of transmitting terminal system of free-space optical communication system, comprise: Chuan Jie network management device, chip, transmission control device and sending module successively, after this network management device receives the judgement signal of receiving terminal system answer, should judge that signal sent to chip, make the decision of transmitted power size by chip, and finish the action of transmission power control by transmission control device, send out the signal of corresponding power at last by sending module.
The present invention also provides a kind of receiving terminal system of free-space optical communication system, comprise: Chuan Jie receiver module, chip and network management device successively, after this receiver module receives the signal of transmitting terminal system transmission, this signal is sent to chip, make judgement by chip, and should judge that signal sends to network management device, replied to the transmitting terminal system by this network management device with this signal.
The present invention also provides a kind of control method of transmitted power of free-space optical communication system, comprises the steps: to provide first end system, comprises first network management device, first chip, first transmission control device and first sending module of serial connection successively; Second end system is provided, comprises second receiver module, second chip and second network management device of serial connection successively; After second receiver module receives the signal of first sending module transmission, sending signal to second chip judges, second chip sends to second network management device with judged result, second network management device sends to first chip with this judged result by first network management device, this first chip is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by first transmission control device, send out the signal of corresponding power at last by first sending module.
Compared with prior art, in the control method of the transmitted power of the transmitting terminal system of free-space optical communication system of the present invention, free-space optical communication system, the receiving terminal system of free-space optical communication system and free space optical communication, all adopt chip to come the power of signal that receiving terminal is received to judge, and will judge that by network management device signal replies to transmitting terminal; And transmitting terminal also is by chip the size of transmitted power to be made decision, and finishes control action by transmission control device.Above-mentioned action is all finished automatically by system, and need not people's intervention, thereby variation that can the self adaptation external environment in practice reduces failure rate, guarantees communication quality, saves user's time simultaneously.
[description of drawings]
Fig. 1 is the schematic diagram of first execution mode of free-space optical communication system of the present invention.
Fig. 2 is the schematic diagram of second execution mode of free-space optical communication system of the present invention.
[embodiment]
Seeing also Fig. 1, is the schematic diagram of first execution mode of free-space optical communication system of the present invention.This free-space optical communication system 1 comprises transmitting terminal system (not indicating) and receiving terminal system (not indicating).This transmitting terminal system comprises transmitting terminal network management device 12, transmitting terminal chip 11, transmission control device 10 and the sending module 13 of serial connection successively, and receiving terminal system comprises receiver module 19, receiving terminal chip 16 and the receiving terminal network management device 17 of serial connection successively.
When receiver module 19 receives the light signal that is sended over by sending module 13, light signal is become the signal of telecommunication send into receiving terminal chip 16, this signal is a magnitude of voltage, represents average received power.Then, make judgement by the size of 16 pairs of signal powers of receiving terminal chip, this receiving terminal chip 16 sends to receiving terminal network management device 17 with judged result.This receiving terminal network management device 17 sends to transmitting terminal chip 11 with this judged result by transmitting terminal network management device 12.This transmitting terminal chip 11 is made the decision of transmitted power size according to this judged result, and finishes the action of transmission power control by transmission control device 10, is sent out the signal of corresponding power at last by sending module.
Be provided with 3 grades in the transmission control device 10,, work in middle-gradely when " 01 " or " 10 ", work in the most high-grade when " 11 " when working in deep low gear during for " 00 " from the control signal of transmitting terminal chip 11.
For example: the transmitting optical power of supposing the system now is in middle-grade.If the magnitude of voltage that receiving terminal chip 16 receives is higher than the magnitude of voltage that approaches saturated light power that program sets, this receiving terminal chip 16 just sends a command signal " 11 " to transmitting terminal network management device 12 by receiving terminal network management device 17, this transmitting terminal network management device 12 is passed to transmitting terminal chip 11 after receiving this command signal, this transmitting terminal chip 11 parses this instruction " 11 ", give transmission control device 10 by its I/O mouth output control signal " 00 ", reduce the transmitted power shelves, thereby reduce the laser transmitted power.
If the magnitude of voltage that receiving terminal chip 16 receives is lower than the magnitude of voltage that approaches sensitivity that program sets, this receiving terminal chip 16 just sends a command signal " 00 " to transmitting terminal network management device 12 by receiving terminal network management device 17, this transmitting terminal network management device 12 is passed to transmitting terminal chip 11 after receiving this command signal, this transmitting terminal chip 11 parses this instruction " 00 ", give transmission control device 10 by its I/O mouth output control signal " 11 ", rising transmitted power shelves, thus the laser transmitted power increased.
If the magnitude of voltage that receiving terminal chip 16 receives is between the magnitude of voltage that approaches saturated light power and sensitivity that program sets, this receiving terminal chip 16 and receiving terminal network management device 17 just are failure to actuate, transmitting terminal network management device 12 and transmitting terminal chip 11 are confiscated instruction and also are failure to actuate, thereby keep the transmitted power shelves constant.
The receiving terminal system of this free-space optical communication system 1 is judged by the power of the signal that 16 pairs of receiver modules 19 of receiving terminal chip are received, and will be judged that by receiving terminal network management device 17 signal replies to transmitting terminal network management device 12; And the transmitting terminal system makes decision by the size of 11 pairs of transmitted powers of transmitting terminal chip, and finishes control action by transmission control device 10.Above-mentioned action is all finished automatically by system, and need not people's intervention, thereby variation that can the self adaptation external environment in practice reduces failure rate, guarantees communication quality, brings convenience to the user simultaneously.
Seeing also Fig. 2, is the schematic diagram of second execution mode of free-space optical communication system of the present invention.This free-space optical communication system 2 comprises first end system (not indicating) and second end system (not indicating).This first end system comprises first network management device 22, first chip 21, first transmission control device 20 and first sending module 23 of serial connection successively.Second end system comprises second receiver module 29, second chip 26 and second network management device 27 of serial connection successively.Receive the signal of first sending module, 23 transmissions when second receiver module 29 after, sending signal to second chip 26 judges, second chip 26 sends to second network management device 27 with judged result, second network management device 27 sends to first chip 21 with this judged result by first network management device 22, this first chip 21 is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by first transmission control device 20, send out the signal of corresponding power at last by first sending module 23.
Compare with free-space optical communication system 1, in this free-space optical communication system 2, this first end system further comprises first receiver module 24 that links to each other with first chip 21, and this second end system further comprises second transmission control device 25 that links to each other with second chip 26 and second sending module 28 that links to each other with this second transmission control device 25.Receive the signal of second sending module, 28 transmissions when first receiver module 24 after, sending signal to first chip 21 judges, first chip 21 sends to first network management device 22 with judged result, first network management device 22 sends to second chip 26 with this judged result by second network management device 27, this second chip 26 is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by second transmission control device 25, send out the signal of corresponding power at last by second sending module 28.
Identical with the principle of free-space optical communication system 1, this free-space optical communication system 2 can be finished the control of transmitted power automatically, and need not people's intervention, thereby variation that can the self adaptation external environment in practice, reduce failure rate, guarantee communication quality, bring convenience to use simultaneously.In addition, the two ends of this free-space optical communication system 2 can be simultaneously as transmitting terminal and receiving terminal, thereby this free-space optical communication system 2 can adopt laser signal to finish duplex communication more easily.
Claims (8)
1. free-space optical communication system, it comprises first end system and second end system, it is characterized in that: this first end system comprises first network management device of serial connection successively, first chip, first transmission control device and first sending module, second end system comprises second receiver module of serial connection successively, second chip and second network management device, receive the signal of first sending module transmission when second receiver module after, sending signal to second chip judges, second chip sends to second network management device with judged result, second network management device sends to first chip with this judged result by first network management device, this first chip is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by first transmission control device, send out the signal of corresponding power at last by first sending module.
2. free-space optical communication system as claimed in claim 1 is characterized in that: this signal is a level signal.
3. free-space optical communication system as claimed in claim 1, it is characterized in that: this first end system further comprises first receiver module that links to each other with first chip, this second end system further comprises second transmission control device that links to each other with second chip and second sending module that links to each other with this second transmission control device, receive the signal of second sending module transmission when first receiver module after, sending signal to first chip judges, first chip sends to first network management device with judged result, first network management device sends to second chip with this judged result by second network management device, this second chip is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by second transmission control device, send out the signal of corresponding power at last by second sending module.
4. the transmitting terminal system of a free-space optical communication system, it comprises sending module, be characterised in that: it also comprises network management device, chip and the transmission control device of serial connection successively, this transmission control device is connected with sending module, after this network management device receives the judgement signal of receiving terminal system answer, should judge that signal sent to chip, make the decision of transmitted power size by chip, and finish the action of transmission power control by transmission control device, send out the signal of corresponding power at last by sending module.
5. the receiving terminal system of a free-space optical communication system, it comprises receiver module, be characterised in that: it also comprises chip and the network management device that is connected in series successively with this receiver module, after this receiver module receives the signal of transmitting terminal system transmission, this signal is sent to chip, make judgement by chip, and should judge that signal sends to network management device, replied to the transmitting terminal system by this network management device with this signal.
6. the control method of the transmitted power of a free-space optical communication system is characterized in that comprising the steps:
First end system is provided, comprises first network management device, first chip, first transmission control device and first sending module of serial connection successively;
Second end system is provided, comprises second receiver module, second chip and second network management device of serial connection successively;
After second receiver module receives the signal of first sending module transmission, sending signal to second chip judges, second chip sends to second network management device with judged result, second network management device sends to first chip with this judged result by first network management device, this first chip is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by first transmission control device, send out the signal of corresponding power at last by first sending module.
7. the control method of the transmitted power of free-space optical communication system as claimed in claim 6, it is characterized in that: this signal is a level signal.
8. the control method of the transmitted power of free-space optical communication system as claimed in claim 6, it is characterized in that: this control method also comprises the steps:
First receiver module that links to each other with first chip is provided;
Second transmission control device that links to each other with second chip and second sending module that links to each other with this second transmission control device are provided;
After first receiver module receives the signal of second sending module transmission, sending signal to first chip judges, first chip sends to first network management device with judged result, first network management device sends to second chip with this judged result by second network management device, this second chip is made the decision of transmitted power size according to this judged result, and finish the action of transmission power control by second transmission control device, send out the signal of corresponding power at last by second sending module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100522120A CN1633043A (en) | 2004-11-08 | 2004-11-08 | Free space optical communication system and transmission power control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100522120A CN1633043A (en) | 2004-11-08 | 2004-11-08 | Free space optical communication system and transmission power control method thereof |
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| CN1633043A true CN1633043A (en) | 2005-06-29 |
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| CNA2004100522120A Pending CN1633043A (en) | 2004-11-08 | 2004-11-08 | Free space optical communication system and transmission power control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102571205A (en) * | 2012-02-20 | 2012-07-11 | 深圳市新岸通讯技术有限公司 | Transmission method and system for free space optical communication (FSO) signal |
| CN102857294A (en) * | 2011-06-29 | 2013-01-02 | 重庆邮电大学 | Method and device for suppressing signal fading in laser communication from ground to GEO (geosynchronous) satellite |
| CN101719790B (en) * | 2009-12-04 | 2013-01-30 | 山东大学 | Laser self-adoptive trace adjustment system |
| CN106506093A (en) * | 2016-11-28 | 2017-03-15 | 中车株洲电力机车研究所有限公司 | A kind of FSO communication systems |
-
2004
- 2004-11-08 CN CNA2004100522120A patent/CN1633043A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719790B (en) * | 2009-12-04 | 2013-01-30 | 山东大学 | Laser self-adoptive trace adjustment system |
| CN102857294A (en) * | 2011-06-29 | 2013-01-02 | 重庆邮电大学 | Method and device for suppressing signal fading in laser communication from ground to GEO (geosynchronous) satellite |
| CN102857294B (en) * | 2011-06-29 | 2014-12-31 | 重庆邮电大学 | Method and device for suppressing signal fading in laser communication from ground to GEO (geosynchronous) satellite |
| CN102571205A (en) * | 2012-02-20 | 2012-07-11 | 深圳市新岸通讯技术有限公司 | Transmission method and system for free space optical communication (FSO) signal |
| CN102571205B (en) * | 2012-02-20 | 2015-09-30 | 深圳市新岸通讯技术有限公司 | The transmission method of free space optical communication FSO signal and system |
| CN106506093A (en) * | 2016-11-28 | 2017-03-15 | 中车株洲电力机车研究所有限公司 | A kind of FSO communication systems |
| CN106506093B (en) * | 2016-11-28 | 2019-09-06 | 中车株洲电力机车研究所有限公司 | A kind of FSO communication system |
| US10547382B2 (en) | 2016-11-28 | 2020-01-28 | Crrc Zhuzhou Electric Locomotive Research Institute Co., Ltd. | FSO communication system |
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