CN106027149B - Using multi-user's visible light communication device and method at multiple rotatable top set ends - Google Patents
Using multi-user's visible light communication device and method at multiple rotatable top set ends Download PDFInfo
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- CN106027149B CN106027149B CN201610578152.9A CN201610578152A CN106027149B CN 106027149 B CN106027149 B CN 106027149B CN 201610578152 A CN201610578152 A CN 201610578152A CN 106027149 B CN106027149 B CN 106027149B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1149—Arrangements for indoor wireless networking of information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- Computer Networks & Wireless Communication (AREA)
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Abstract
Multi-user's visible light communication device and method using multiple rotatable top set ends belongs to wireless communication technology field.The prior art is limited to a user terminal.The device of the present invention it is characterized in that, rotatable top set end and user terminal have it is multiple；Multiple rotatable top set ends are exchanged respectively with optical fiber by optical fiber and the connection of system integrated controller, and optical fiber exchanges and system integrated controller is connect by Drop cable with outer net；User terminal is connected with user's optical fiber；It is also equipped with camera on the rotatable top set end.The method of the present invention it is characterized in that, in same interior, participate in the rotatable top set end of communication and user terminal have it is multiple；Camera on rotatable top set end is in running order always；When user equipment is connected with user's optical fiber of a certain user terminal, user terminal light source luminescent, black white image is obtained after being shot with video-corder simultaneously by the camera on multiple rotatable top set ends, is exchanged by optical fiber and system integrated controller instructs the rotatable top set end for obtaining the minimum gradation value black white image to be communicated with the user terminal accordingly.
Description
Technical field
The present invention relates to a kind of multi-user's visible light communication device and methods using multiple rotatable top set ends, belong to nothing
Line communication technology field.
Background technology
Instantly short-distance wireless communication such as indoor wireless communication the most popular is Wi-Fi.However, Wi-Fi belongs to electromagnetism
Wave communication, even if the 802.11ac of latest edition, frequency are also only 5Ghz, this means that communication bandwidth is limited, and then limits
The raising of traffic rate.Li-Fi can reach the message transmission rate of 10Gb/s, breach Wi-Fi due to belonging to lightwave communication
The message transmission rate upper limit of 7Gb/s.If light source uses laser, rather than LED, message transmission rate can be easy to surpass
Go out 100Gb/s.
The core of Li-Fi communication devices includes top set end and user terminal, and top set end is connect by Drop cable with outer net,
User terminal is connect by user's optical fiber with user equipment such as computer.Top set end, user terminal are by light source and its driving chip and light
Quick receiver composition.By taking signal downlink transmits as an example, under the control for the driving electric signal that driving chip is sent out at top set end, light source
If LED high speed scintillations shine, it is visually not aware of this high speed scintillation, adds signal of communication by the form of bright, dark alternately variation
It is downloaded on light wave and forms binary coding, quickly received by user terminal photoreceiver after transmission, it will be by light wave by decoding
The signal of transmission sends user equipment to through user's optical fiber, completes the wireless communication in a direction.
It is however, Li-Fi wirelessly communicates its inadequate natural endowment, light wave carrier wave straightline propagation, when in top set end and user terminal
Between there are when barrier, light wave carrier wave is blocked, Li-Fi wireless communication be blocked.When user equipment is shifted one's position indoors,
Or have multiple user equipmenies simultaneously when being communicated with single top set end, the case where barrier blocks occur just will appear, channel radio
Therefore the reliability of letter is affected.This is the technical barrier that Li-Fi wireless communication technology fields face, and is led in the prior art
There are some solutions around the technical barrier in domain.
It discloses one application No. is 201410401349.6 Chinese patent application and entitled " takes into account illumination and logical
The scheme of the method for arranging of the indoor LED lamp array of letter reliability ", this method establish three dimensions mould using interior space parameter
Type optimizes layout of the LED light array in ceiling plane, it is ensured that LED light array by solving object function to be optimized
In each LED light work asynchronously to each other, the final barrier occlusion issue for solving Li-Fi wireless communications.However, LED light
The signal that different LED light are sent out in array can interfere with each other；Further more, to obtain better effect, need to arrange indoors more
More LED light increases the complexity and cost of system.
Application No. is 201410555565.6 Chinese patent applications to disclose an entitled " power line and visible
The scheme of the communication means and system of light fusion ", the program is using the shape for arranging multiple LED communication terminals (top set end) indoors
Formula solves the occlusion issue of optic communication, and innovative point is to connect using power system telecommunications technology between each LED light, i.e., signal adds
It is downloaded on power line and transmits, to realize that each LED communication terminal works asynchronously.However, the signal that different LED communication terminals are sent out
Also it can interfere with each other；Also, the maximum bandwidth of current power line communication is only 100M, and it is logical that this link can become the indoor wireless
The bottleneck of letter.
Application No. is 201510163596.1 Chinese patent application disclose one it is entitled " based on rotatable
The scheme of the indoor three-dimensional positioning system and method for LED transmitting terminals ", the program are carried by the difference between calculating the power received
Location information is taken, the beam angle of single LED light communication terminal is rotated to solve the occlusion issue of optic communication according to location information.
If however, always there is communication blind district in the mode that the program is rotated only with single communication terminal in practical applications.
The items known technology user terminal is one, that is, only there are one user terminals in an interior space, no matter
Which scheme is only a user terminal service.
Invention content
The present invention is intended to provide a kind of indoor visible light communication scheme, is realizing high-speed visible light communication and is solving obstacle
Under the premise of object occlusion issue, the signal that different LED light are sent out is avoided to interfere with each other, allows multiple users in an interior space
It holds while using, and therefore system structure will not become complicated, for this purpose, using multiple rotatable top sets we have invented a kind of
Multi-user's visible light communication device and method at end.
The present invention using multiple rotatable top set ends multi-user's visible light communication device include rotatable top set end and
User terminal, which is characterized in that the rotatable top set end and user terminal have multiple；Multiple rotatable top set ends are respectively by optical fiber
It is exchanged with optical fiber and the connection of system integrated controller, optical fiber exchange and system integrated controller is connect by Drop cable with outer net；
User terminal is connected with user's optical fiber；It is also equipped with camera on the rotatable top set end.
Multi-user's visible light communication method using multiple rotatable top set ends of the present invention is in rotatable top set end and use
Two-way wireless communication between the end of family, which is characterized in that in same interior, the rotatable top set end and user terminal that participate in communication have
It is multiple；Camera on rotatable top set end is in running order always；When user's optical fiber of user equipment and a certain user terminal
When being connected, user terminal light source luminescent obtains black white image after being shot with video-corder simultaneously by the camera on multiple rotatable top set ends, these
Black white image is transferred to optical fiber exchange and system integrated controller by optical fiber respectively, and optical fiber exchanges at this time and system synthesis is controlled
Device processed sends control signal to the rotating mechanism at each rotatable top set end makes rotatable top set end rotate, until come from it is each can
The black white image gray value of camera on rotation top set end all reaches minimum value, at this point, being integrated again by optical fiber exchange and system
Controller further determines that minimum gradation value black white image, instruction obtain in the black white image that these gray scales have reached minimum value
The rotatable top set end of the minimum gradation value black white image is communicated with the user terminal；If having user equipment and a certain user terminal again
User's optical fiber when being connected, a rotatable top set end and the user terminal are determined in remaining rotatable top set end by the above process
Communication.
Its technique effect of the invention is as described below.It is real since the present invention uses multiple rotatable top set ends in same interior
Existing space all standing is communicated without dead angle, though between a certain rotatable top set end and a certain user terminal there are if barrier not
Visible light wireless communication can be interfered.Although using multiple rotatable top set ends, it is finally One-to-one communication, that is, one
A rotatable top set end is communicated with a user terminal, and is to be communicated after optimization with best angle, in most short communication distance,
Different rotatable interference between top set end and different user end are preferably minimized, while being realized more in an interior space
A user terminal is simultaneously with visible light wireless communication mode, under the premise of this, system structure not counting complexity.
Each user terminal unshared bandwidth, therefore, can't because a plurality of clients simultaneously with visible light wireless communication mode due to
Lead to the decline of traffic rate.For example, when 5 rotatable top set ends are arranged, open ended maximum user terminal is 5, if single
The bandwidth of the visible light wireless communication in road is 100M, then can occupy the communication band of 100M alone in same indoor each user terminal
Width does not interfere with each other.
As long as user terminal number be less than or equal to rotatable top set end number, all user terminals can normal communication, without configure
Excessive top set end.The present invention is connected using all -fiber, and signal transmission rate is much larger than power line, and it is logical can to play visible light completely
The rate advantage of letter, without rate limit existing for power line communication.
Description of the drawings
Fig. 1 is multi-user's visible light communication equipments overall structure and the work for using multiple rotatable top set ends of the present invention
Status diagram, the figure are used as Figure of abstract simultaneously.Fig. 2 is the visible using the multi-user at multiple rotatable top set ends of the present invention
Rotatable top set end structure in optical communication apparatus and working state schematic representation.Fig. 3 is rotatably being set using multiple for the present invention
Optical fiber exchange and system integrated controller structure in multi-user's visible light communication device on top and working state schematic representation.
Specific implementation mode
The present invention includes rotatable 1 He of top set end using multi-user's visible light communication device at multiple rotatable top set ends
User terminal 2, as shown in Figure 1, the rotatable top set end 1 and user terminal 2 have multiple, such as 51,2, rotatable top set ends
User terminal 2.Multiple rotatable top set ends 1 are exchanged respectively with optical fiber by optical fiber 3 and system integrated controller 4 connects, and optical fiber exchanges
And system integrated controller 4 is connect by Drop cable 5 with outer net.User terminal 2 is connected with user's optical fiber 6.The rotatable top set
It is also equipped with camera 7 on end 1, as shown in Figure 2.
In the rotatable top set end 1, as shown in Fig. 2, by azimuth rotating platform 8, pedestal 9, pitching rotary 10 is constituted can
The rotating mechanism at top set end 1 is rotated, azimuth rotating platform 8 is mounted on pedestal 9, and pitching rotary 10 is mounted on azimuth rotating platform 8；Camera shooting
First 7, light source 11, photoreceiver 12 are mounted on pitching rotary 10.Light source 11 is taken on by 1~4 LED and its driving chip；
The LED is blue-ray LED, to ensure to have sufficiently high modulation rate, or by the LED of multiple color forms wavelength-division multiplex
Array, further to promote communication bandwidth.The imaging viewing field of the irradiation covering of the fan and camera 7 of light source 11 coincides, with maximum limit
Degree increases the tracking alignment precision at rotatable top set end 1, improves communication stability.
In optical fiber exchange and system integrated controller 4, as shown in figure 3, optical fiber 3 accesses GTX/GTP communication units,
GTX/GTP communication units are electrically connected with optimal algorithm control unit, equalizing circuit, control circuit, data processing circuit respectively；Most
Excellent algorithm control unit is also electrically connected with image processing unit, correcting circuit respectively；Image processing unit also respectively at data
Manage circuit, correcting circuit, equalizing circuit electrical connection；Control circuit is also electrically connected with data processing circuit, correcting circuit respectively；Enter
Family optical fiber 5 accesses data processing circuit.
Multi-user's visible light communication method using multiple rotatable top set ends of the present invention is at rotatable top set end 1 and uses
Two-way wireless communication between family end 2, as shown in Figure 1, in same interior, rotatable top set end 1 and the user terminal 2 for participating in communication are equal
Have multiple.Camera 7 on rotatable top set end 1 is in running order always.When the use of user equipment 13 and a certain user terminal 2
When family optical fiber 6 is connected, 2 light source luminescent of user terminal obtains black after being shot with video-corder simultaneously by the camera 7 on multiple rotatable top set ends 1
White image, these black white images are transferred to optical fiber exchange and system integrated controller 4 by optical fiber 3 respectively, and optical fiber is handed at this time
It changes and system integrated controller 4 makes 1 turn of rotatable top set end to the rotating mechanism at each rotatable top set end 1 transmission control signal
It is dynamic, until the black white image gray value of the camera 7 on each rotatable top set end 1 all reaches minimum value, at this point, again by
Optical fiber exchanges and system integrated controller 4 further determines that minimal gray in the black white image that these gray scales have reached minimum value
It is worth black white image, the rotatable top set end 1 that instruction obtains the minimum gradation value black white image is communicated with the user terminal 2.If again
It is true in remaining rotatable top set end 1 by the above process when thering is user equipment 13 to be connected with user's optical fiber 6 of a certain user terminal 2
A fixed rotatable top set end 1 is communicated with the user terminal 2.
7 original state of camera on the rotatable top set end 1 is vertically downward.
The optical fiber exchanges and the course of work of system integrated controller 4 is as described below, as shown in figure 3, optical fiber 3 will come from
The communication data at rotatable top set end 1, image data are transferred to GTX/GTP communication units；Turn for what different user end 2 serviced
Dynamic top set end 1 is distributed by optimal algorithm control unit, control circuit, and making each user terminal 2 has optimal rotatable top set end
It is matched；Image data from different rotatable top set ends 1 is sent to equalizing circuit, control by GTX/GTP communication units respectively
Circuit and data processing circuit processed；Equalizing circuit is passed to image processing unit after being pre-processed to described image data, by scheming
Picture processing unit extracts the distance between user terminal 2 and rotatable top set end 1 information according to gradation of image, is existed according to user terminal 2
The location information in position extraction user terminal 2 space indoors in 7 visual field of camera, gained range information and location information are passed
It is defeated by optimal algorithm control unit and carries out optimal selection；Correcting circuit is according to image processing unit and control circuit feedack
The operation result of optimal algorithm control unit is corrected and is compensated；Control circuit is according to from GTX/GTP communication units
Image information controls correcting circuit and data processing circuit；Data processing circuit exports anti-according to image processing unit
The control instruction of feedforward information and control circuit respectively carries out Drop cable 5 with the communication data from GTX/GTP communication units
Processing matches current transmission agreement.
The process that optimal algorithm control unit makes optimal selection is as described below, establishes optimum allocation rule control function,
Range information and the location information weighting for the user terminal 2 that function is shot with video-corder by the camera 7 at rotatable top set end 1 form；Optimal
In differentiation, the range information and location information point at the different user end 2 that the camera 7 in different rotatable top set ends 1 is shot with video-corder
Be not brought into the optimum allocation rule control function, if user terminal 2 number it is not unique, need by each user terminal 2 away from
It is brought into from information and location information, calculates the optimum allocation rule control functional value in the case of various combination, Selection of Function value is most
Big combination is as optimal selection；By changing range information and the weight coefficient of location information and the weight system of user terminal 2
It counts to set the priority at different user end 2.
Claims (9)
1. a kind of multi-user's visible light communication device using multiple rotatable top set ends, including rotatable top set end and user
End, which is characterized in that the rotatable top set end and user terminal have multiple；Multiple rotatable top set ends are respectively by optical fiber and light
Fibre exchanges and the connection of system integrated controller, and optical fiber exchanges and system integrated controller is connect by Drop cable with outer net；User
End is connected with user's optical fiber；It is also equipped with camera on the rotatable top set end, when user terminal light source luminescent, is turned by multiple
Camera on dynamic top set end obtains black white image after shooting with video-corder simultaneously, these black white images are transferred to optical fiber by optical fiber respectively
Exchange and system integrated controller；Optical fiber exchanges at this time and system integrated controller can be to the rotation at each rotatable top set end
Mechanism, which sends control signal, makes rotatable top set end rotate, until the artwork master of the camera on each rotatable top set end
As gray value all reaches minimum value, at this point, optical fiber exchanges and system integrated controller can have reached minimum value in these gray scales
Black white image in further determine that minimum gradation value black white image, instruction obtains the rotatable of the minimum gradation value black white image
Top set end is communicated with the user terminal.
2. multi-user's visible light communication device according to claim 1 using multiple rotatable top set ends, feature exists
In in the rotatable top set end (1), rotatable top set end is constituted by azimuth rotating platform (8), pedestal (9), pitching rotary (10)
(1) rotating mechanism, azimuth rotating platform (8) are mounted on pedestal (9), and pitching rotary (10) is mounted on azimuth rotating platform (8)；Camera shooting
Head (7), light source (11), photoreceiver (12) are mounted on pitching rotary (10).
3. multi-user's visible light communication device according to claim 2 using multiple rotatable top set ends, feature exists
In light source (11) is taken on by 1~4 LED and its driving chip；The LED is blue-ray LED, or the LED by multiple color
Form wavelength-division multiplex array.
4. multi-user's visible light communication device according to claim 2 using multiple rotatable top set ends, feature exists
In the irradiation covering of the fan and the imaging viewing field of camera (7) of light source (11) coincide.
5. multi-user's visible light communication device according to claim 1 using multiple rotatable top set ends, feature exists
In in optical fiber exchange and system integrated controller (4), optical fiber (3) accesses GTX/GTP communication units, GTX/GTP communications
Unit is electrically connected with optimal algorithm control unit, equalizing circuit, control circuit, data processing circuit respectively；Optimal algorithm controls
Unit is also electrically connected with image processing unit, correcting circuit respectively；Image processing unit also respectively with data processing circuit, correction
Circuit, equalizing circuit electrical connection；Control circuit is also electrically connected with data processing circuit, correcting circuit respectively；Drop cable (5) connects
Enter data processing circuit；Communication data from rotatable top set end (1), image data are transferred to GTX/GTP and led to by optical fiber (3)
Believe unit；It is distributed, is made by optimal algorithm control unit, control circuit for the rotatable top set end (1) of different user end (2) service
Each user terminal (2) has optimal rotatable top set end matched；GTX/GTP communication units will come from difference and rotatably set
The image data on top 1 is sent to equalizing circuit, control circuit and data processing circuit respectively；Equalizing circuit is to described image data
Image processing unit is passed to after being pre-processed, by image processing unit according to gradation of image extraction user terminal (2) and rotatably
The distance between top set end (1) information, according to position extraction user terminal (2) of the user terminal (2) in camera (7) visual field in room
Gained range information and location information are transferred to optimal algorithm control unit and carry out optimal selection by the location information in interior space；
Correcting circuit carries out the operation result of optimal algorithm control unit according to image processing unit and control circuit feedack
Correction and compensation；Control circuit is according to the image information from GTX/GTP communication units to correcting circuit and data processing circuit
It is controlled；Data processing circuit is right respectively according to the control instruction of feedback information and control circuit that image processing unit exports
Drop cable (5) and the communication data from GTX/GTP communication units are handled, and current transmission agreement is matched.
6. a kind of multi-user's visible light communication method using multiple rotatable top set ends, rotatable top set end and user terminal it
Between two-way wireless communication, which is characterized in that in same interior, participate in communication rotatable top set end and user terminal have it is multiple；
Camera on rotatable top set end is in running order always；When user equipment is connected with user's optical fiber of a certain user terminal
When, user terminal light source luminescent obtains black white image, these black and white after being shot with video-corder simultaneously by the camera on multiple rotatable top set ends
Image is transferred to optical fiber exchange and system integrated controller by optical fiber respectively, optical fiber exchange at this time and system integrated controller
Sending control signal to the rotating mechanism at each rotatable top set end makes rotatable top set end rotate, each rotatable until coming from
The black white image gray value of camera on top set end all reaches minimum value, at this point, again by optical fiber exchange and system Comprehensive Control
Device further determines that minimum gradation value black white image, instruction obtain this most in the black white image that these gray scales have reached minimum value
The rotatable top set end of small gray value black white image is communicated with the user terminal；If there is the use of user equipment and a certain user terminal again
When family optical fiber is connected, determine that a rotatable top set end is logical with the user terminal in remaining rotatable top set end by the above process
Letter.
7. multi-user's visible light communication method according to claim 6 using multiple rotatable top set ends, feature exists
In camera (7) original state on the rotatable top set end (1) is vertically downward.
8. multi-user's visible light communication method according to claim 6 using multiple rotatable top set ends, feature exists
In the optical fiber exchanges and the course of work of system integrated controller (4) is as described below, and optical fiber (3) will come from rotatable top set
The communication data of (1), image data is held to be transferred to GTX/GTP communication units；For the rotatable top set of different user end (2) service
Hold (1) by optimal algorithm control unit, control circuit distribute, make each user terminal (2) have optimal rotatable top set end with
It is matched；Image data from different rotatable top set ends 1 is sent to equalizing circuit, control by GTX/GTP communication units respectively
Circuit and data processing circuit；Equalizing circuit is passed to image processing unit after being pre-processed to described image data, by image
Processing unit extracts the distance between user terminal (2) and rotatable top set end (1) information according to gradation of image, according to user terminal
(2) location information in position extraction user terminal (2) space indoors in camera (7) visual field, by gained range information and
Location information is transferred to optimal algorithm control unit and carries out optimal selection；Correcting circuit is according to image processing unit and control circuit
Feedack is corrected and compensates to the operation result of optimal algorithm control unit；Control circuit is according to from GTX/GTP
The image information of communication unit controls correcting circuit and data processing circuit；Data processing circuit is according to image procossing list
The feedback information of member output and the control instruction of control circuit are respectively to Drop cable (5) and from GTX/GTP communication units
Communication data is handled, and current transmission agreement is matched.
9. multi-user's visible light communication method according to claim 8 using multiple rotatable top set ends, feature exists
In, the process that optimal algorithm control unit makes optimal selection is as described below, establishes optimum allocation rule control function, function by
The range information and location information weighting composition for the user terminal (2) that the camera (7) at rotatable top set end (1) is shot with video-corder；Optimal
In differentiation, the range information at the different user end (2) that the camera (7) in different rotatable top set ends (1) is shot with video-corder and position
Information is brought into respectively in the optimum allocation rule control function, if user terminal (2) number is not unique, is needed each user
The range information and location information for holding (2) are brought into, and the optimum allocation rule control functional value in the case of various combination is calculated, and are chosen
The maximum combination of functional value is used as optimal selection；By the weight coefficient and user terminal of changing range information and location information
(2) weight coefficient sets the priority of different user end (2).
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| CN109116298B (en) * | 2017-06-22 | 2023-12-22 | 中兴通讯股份有限公司 | Positioning method, storage medium and positioning system |
| CN110426673B (en) * | 2019-01-29 | 2021-05-04 | 浙江大学 | Visible light positioning communication method and system based on wavelength division multiplexing |
| CN113900063A (en) * | 2021-09-17 | 2022-01-07 | 湖北文理学院 | Visible light positioning-assisted multi-user optical communication system and method |
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| CN101729946A (en) * | 2009-11-23 | 2010-06-09 | 广讯(天津)科技有限公司 | Multi-user access unit |
| CN101873176A (en) * | 2010-05-19 | 2010-10-27 | 中国科学院半导体研究所 | Multi-user optical wireless two-way data communication system and method |
| CN102916749A (en) * | 2012-10-18 | 2013-02-06 | 陈思源 | Light communication transmitting and receiving system |
| CN104166763A (en) * | 2014-08-15 | 2014-11-26 | 上海交通大学 | Indoor LED lamp array arrangement method integrating lighting and communication reliability |
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| KR101375015B1 (en) * | 2007-07-06 | 2014-03-14 | 삼성전자주식회사 | Apparatus and method for communication link keeping visibility using visible light communication |
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| CN101729946A (en) * | 2009-11-23 | 2010-06-09 | 广讯(天津)科技有限公司 | Multi-user access unit |
| CN101873176A (en) * | 2010-05-19 | 2010-10-27 | 中国科学院半导体研究所 | Multi-user optical wireless two-way data communication system and method |
| CN102916749A (en) * | 2012-10-18 | 2013-02-06 | 陈思源 | Light communication transmitting and receiving system |
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