CN106549708B - Wireless local area network, terminal, control method and device thereof, and wireless communication system - Google Patents
Wireless local area network, terminal, control method and device thereof, and wireless communication system Download PDFInfo
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- CN106549708B CN106549708B CN201611051962.5A CN201611051962A CN106549708B CN 106549708 B CN106549708 B CN 106549708B CN 201611051962 A CN201611051962 A CN 201611051962A CN 106549708 B CN106549708 B CN 106549708B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims description 82
- 238000001514 detection method Methods 0.000 claims description 24
- 230000001133 acceleration Effects 0.000 claims description 12
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Classifications
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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
-
- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
-
- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Small-Scale Networks (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a control method for detecting communication stability under visible light, which is used for controlling a wireless local area network. The wireless local area network includes a wireless access point and a light source. The control method comprises the following steps: judging whether information of a relatively stable state fed back by a terminal communicating with a wireless local area network is received or not; when receiving information, the light source is controlled to emit signal light to communicate with the terminal through the visible light link, the terminal detects the signal light to obtain link parameters of the visible light link, and the link parameters are sent to the wireless access point through the wireless link; and when the information is not received, the wireless local area network and the terminal adopt a wireless link to carry out downlink communication. The invention also provides a control device for controlling the wireless local area network, a control method and a control device for controlling the terminal, the terminal and a wireless communication system. The invention determines the transmission mode of the downlink communication by detecting the stability of the visible light downlink communication, thereby improving the communication quality and the transmission efficiency.
Description
Technical field
The present invention relates to WLAN and terminal and its control method and devices, wireless communication system, more particularly to use
In the control method and control device and channel radio of control WLAN and the visible light downlink communication Detection of Stability of terminal
Letter system.
Background technique
Visible light communication by communication data load on transmitting terminal light source driving voltage or driving current to control light source
Emitting signal light, the photoelectric detection device detection signal light of receiving end simultaneously demodulates communication data to come from signal light, thus
Realize wireless communication.Visible light communication has the advantages that environmentally friendly no electromagnetic pollution has been widely used in the downlink of WLAN
In link communication.
It is appreciated that since the angle of divergence of light source is limited, and photoelectric detection device also has certain detecting field angle, because
Whether this photoelectric detection device is directed at the stability that will affect visible light communication with light source, however, the terminal as receiving end exists
Position and orientation may change in use process, cause the stability of visible light communication inadequate, influence visible light communication matter
Amount, and the stability of visible light communication is detected there is no mature detection technique now.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention is provided to control
The control method and control device of the visible light downlink communication Detection of Stability of WLAN processed, for the visible of controlling terminal
The control method and control device and wireless communication system of light downlink communication Detection of Stability.
The control method of the visible light downlink communication Detection of Stability of embodiment of the present invention, for controlling wireless local area
Net, the WLAN include wireless access point and light source, the control method the following steps are included:
Judge whether to receive the information in metastable state with the terminal of wireless LAN communication feedback；
The light source transmitting signal light is controlled when receiving the information with logical by visible optical link and the terminal
Letter, the terminal detect the signal light to obtain the link parameter of visible optical link, and by Radio Link to described wireless
Access point sends the link parameter；With
Downlink communication is carried out using Radio Link and the terminal when not receiving the information.
In some embodiments, the information in metastable state of the terminal feedback is including the use of Radio Link
Feed back the information.
In some embodiments, the link parameter of the visible optical link include the visible optical link signal-to-noise ratio and
Signal strength.
In some embodiments, the control method further comprises the steps of:
Judge whether the link parameter of the visible optical link is greater than preset threshold；With
It will be right according to the parameter of the visible optical link when the link parameter of the visible optical link is greater than preset threshold
The communication data of rate is answered to distribute to the visible optical link.
The control device that communication stability detects under the visible light of embodiment of the present invention, for controlling WLAN,
The WLAN includes wireless access point and light source, and the control device includes first judgment module, first processing module
And Second processing module.The first judgment module is anti-with the terminal of the wireless LAN communication for judging whether to receive
The information in metastable state of feedback, the first processing module is for controlling the light source when receiving the information
Emit signal light to communicate by visible optical link with the terminal, the terminal detects the signal light to obtain visible light chain
The link parameter on road, and the link parameter, the Second processing module are sent to the wireless access point by Radio Link
For using Radio Link to be communicated with the terminal when not receiving the information.
In some embodiments, the control device further includes the second judgment module, distribution module.Second judgement
Module for judging whether the link parameter of the visible optical link is greater than preset threshold, the distribution module be used for it is described can
According to the parameter of the visible optical link by the communication data of corresponding speed when the link parameter of light-exposed link is greater than preset threshold
Distribute to the visible optical link.
The WLAN of embodiment of the present invention includes the visible light downlink for controlling the WLAN
The control device of communication stability detection.
The control method of the visible light downlink communication Detection of Stability of embodiment of the present invention uses wireless office for controlling
The terminal of domain net, the WLAN includes wireless access point and light source, the control method the following steps are included:
Judge whether the terminal is in metastable state；
The terminal is controlled when the terminal is not in metastable state using Radio Link and the wireless local area
Net carries out downlink communication；
The terminal is controlled when the terminal is in metastable state detects the signal light of the light source transmitting with logical
Visible optical link and the wireless LAN communication are crossed, and obtains the link parameter of visible optical link；
The signal light is handled to initialize the visible optical link；With
It controls the terminal and the link parameter is sent to the wireless access point by Radio Link.
In some embodiments, the terminal includes 3-axis acceleration sensor, described to judge whether the terminal is located
The acceleration in three directions of terminal is detected to judge including the use of the 3-axis acceleration sensor in metastable state
Whether the terminal is in metastable state.
In some embodiments, the processing signal light includes following sub-step to initialize the visible optical link
It is rapid:
Judge whether the signal strength for the signal light that the terminal receives is greater than predetermined value；
The synchronization threshold value of the visible optical link is improved when the signal strength of the signal light is greater than the predetermined value；
With
The synchronization threshold value of the visible optical link is reduced when the intensity of the signal is less than or equal to the predetermined value.
The control device of the visible light downlink communication Detection of Stability of embodiment of the present invention uses wireless office for controlling
The terminal of domain net, the WLAN includes wireless access point and light source, and the control device includes third judgment module, the
Three processing modules, fourth processing module, the 5th processing module and feedback module.The third judgment module is for judging the end
End whether be in metastable state, the third processing module be used for when the terminal is not in metastable state described in
Terminal carries out downlink communication using Radio Link and the WLAN, and the fourth processing module is used at the terminal
The terminal is controlled when metastable state detects the signal light of the light source transmitting by visible optical link and the nothing
Line local area network communication, and obtain the link parameter of visible optical link, the 5th processing module for handle the signal light with
The visible optical link is initialized, the feedback module passes through Radio Link to the wireless access point for controlling the terminal
Send the link parameter.
In some embodiments, the 5th processing module includes the 4th judgment module, the first adjustment module and second
Adjust module.Whether the signal strength for the signal light that the 4th judgment module is used to judge that the terminal receives is greater than
Predetermined value, the first adjustment module are used to improve when the signal strength of the signal light is greater than the predetermined value described visible
The synchronization threshold value of optical link, the second adjustment module are used for when the intensity of the signal is less than or equal to the predetermined value
Reduce the synchronization threshold value of the visible optical link.
The terminal of embodiment of the present invention includes the visible light downlink for controlling the terminal for using WLAN
The control device of communication stability detection.
The wireless communication system of embodiment of the present invention includes the WLAN and the terminal.
The visible light downlink communication Detection of Stability for controlling WLAN and terminal of embodiment of the present invention
Control method and control device and wireless communication system detect visible optical link before carrying out downlink communication using visible light first
Stability, select visible optical link to carry out downlink communication in the case where the high stability of visible optical link, in this way, can be with
The problem of caused communication quality difference, can also reduce re-using radio chains in the case where avoiding visible light link stability poor
Transmit the big problem of data bring communication delay in road.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the flow diagram of the control method for controlling WLAN of embodiment of the present invention；
Fig. 2 is the functional block diagram of the control device for controlling WLAN of embodiment of the present invention；
Fig. 3 is another flow diagram of the control method for controlling WLAN of embodiment of the present invention；
Fig. 4 is another functional module signal of the control device for controlling WLAN of embodiment of the present invention
Figure；
Fig. 5 is that the process of the control method for controlling the terminal using WLAN of embodiment of the present invention is illustrated
Figure；
Fig. 6 is the functional module of the control device for controlling the terminal using WLAN of embodiment of the present invention
Schematic diagram；
Fig. 7 is embodiment of the present invention for controlling the process another using the control method of the terminal of WLAN
Schematic diagram；
Fig. 8 is another function of the control device for controlling the terminal using WLAN of embodiment of the present invention
Module diagram；
Fig. 9 is the working principle diagram of the wireless communication system of embodiment of the present invention.
Main element and symbol description:
For controlling control device 10, the first judgment module 11, first processing module 12, second processing of WLAN
Module 13, the second judgment module 14, distribution module 15, the control device 20 for controlling the terminal for using WLAN, the
Three judgment modules 21, third processing module 22, fourth processing module 23, the 5th processing module 24, the 4th judgment module 241,
One adjustment module 242, second adjustment module 243, feedback module 25.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, the meaning of " plurality " is two or more, unless otherwise specifically defined.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.
Referring to Fig. 1, the control method of the visible light downlink communication Detection of Stability of embodiment of the present invention, for controlling
WLAN, the WLAN include wireless access point and light source, the control method the following steps are included:
S11: judge whether to receive with the terminal of wireless LAN communication feedback in metastable state
Information；
S12: the light source transmitting signal light is controlled when receiving the information by visible optical link and the end
End communication, the terminal detect the signal light to obtain the link parameter of visible optical link, and by Radio Link to described
Wireless access point sends the link parameter；With
S13: downlink communication is carried out using Radio Link and the terminal when not receiving the information.
Referring to Fig. 2, the control method of embodiment of the present invention can be by the wireless for controlling of embodiment of the present invention
The control device 10 of local area network is implemented.
Control device 10 for controlling WLAN includes first judgment module 11, first processing module 12 and second
Processing module 13.Wherein, WLAN includes wireless access point and light source.First judgment module 11 is for judging whether to receive
To the information in metastable state with the terminal of wireless LAN communication feedback, first processing module 12 is used for
Light source transmitting signal light is controlled when receiving the information to communicate by visible optical link with the terminal, the terminal
The signal light is detected to obtain the link parameter of visible optical link, and institute is sent to the wireless access point by Radio Link
Link parameter is stated, Second processing module 13 is used to be led to using Radio Link with the terminal when not receiving the information
Letter.
In other words, step S11 can be realized by first judgment module 11, and step S12 can be by first processing module 12
It realizes, step S13 can be realized by Second processing module.
It is appreciated that when WLAN and terminal carry out downlink communication, probably due to the movement of terminal causes terminal
The light source of photoelectric detector misalignment WLAN causes the stability of the visible optical link of downlink communication poor, influences end
The data receiver at end.The stability of visible optical link is first detected before downlink communication, it can be to avoid using unstable visible light
There is the case where error in data reception in terminal caused by link transmission data.In addition, using unstable visible optical link into
After the transmission of row data, it will lead to entirely since the problem of terminal data garbled-reception needs to re-use transmission of radio links data
The time delay of wireless communication system is elongated.The stability of visible optical link is first detected before downlink communication, it can be to avoid data again
The case where transmission, reduces the time delay of wireless communication system, promotes the efficiency of transmission of wireless communication system.
In some embodiments, the information in metastable state of terminal feedback is fed back including the use of Radio Link
The information.
It is appreciated that terminal can not generally provide the light source of sufficient intensity to carry out the uplink of data, therefore, in order to
Guarantee data transmission accuracy and reliability, the uplink communication between terminal and WLAN generally use Radio Link into
The transmission of row data.In this way, terminal feeds back status information using Radio Link, guarantee the efficiency of transmission of data.
In some embodiments, it is seen that the link parameter of optical link include visible optical link signal-to-noise ratio and signal it is strong
Degree.
It is appreciated that the signal-to-noise ratio and signal strength of visible optical link reflect the quality of visible optical link.If noise
It is higher than with signal strength, show that the communication quality of visible optical link is preferable, be conducive to the data receiver of receiving end, promotes data
Received accuracy.
Referring to Fig. 3, in some embodiments, control method further comprises the steps of:
S14: judge whether the link parameter of the visible optical link is greater than preset threshold；With
S15: when the link parameter of the visible optical link is greater than preset threshold according to the parameter of the visible optical link
The communication data of corresponding speed is distributed into the visible optical link.
Referring to Fig. 4, in some embodiments, the control device 10 for controlling WLAN further includes second sentencing
Disconnected module 14 and distribution module 15.Second judgment module 14 is pre- for judging whether the link parameter of the visible optical link is greater than
If threshold value, distribution module 15 is used for when the link parameter of the visible optical link is greater than preset threshold according to the visible light chain
The communication data of corresponding speed is distributed to the visible optical link by the parameter on road.
In other words, step S14 can be realized that step S15 can be realized by distribution module 15 by the second judgment module 14.
It is appreciated that showing visible when the signal-to-noise ratio of visible optical link and signal strength are less than or equal to preset threshold
The communication quality of optical link is poor, therefore, Radio Link should be selected to carry out the data transmission of downlink communication.And in visible optical link
Signal-to-noise ratio and signal strength when being greater than preset threshold, select suitable rate to be led to according to the link parameter of visible optical link
Letter can promote the efficiency of data transmission, guarantee the accuracy of data transmission and reception.
The WLAN of embodiment of the present invention includes the control device 10 for controlling wireless network.In this way, of the invention
The WLAN of embodiment has the ability of downlink communication Detection of Stability.
Referring to Fig. 5, the control method of the visible light downlink communication Detection of Stability of embodiment of the present invention, for controlling
Using the terminal of WLAN, the WLAN includes wireless access point and light source, and the control method includes following
Step:
S21: judge whether the terminal is in metastable state；
S22: the terminal is controlled when the terminal is not in metastable state using Radio Link and described wireless
Local area network carries out downlink communication；
S23: the signal light that the terminal detects the light source transmitting is controlled when the terminal is in metastable state
To pass through visible optical link and the wireless LAN communication, and obtain the link parameter of visible optical link；
S24: the signal light is handled to initialize the visible optical link；With
S25: the terminal is controlled by Radio Link and sends the link parameter to the wireless access point.
Referring to Fig. 6, the control method of embodiment of the present invention can be by for controlling the terminal for using WLAN
Control device 20 realize.
Control device 20 for controlling the terminal for using WLAN includes third judgment module 21, third processing mould
Block 22, fourth processing module 23, the 5th processing module 24 and feedback module 25.Wherein, WLAN includes wireless access point
And light source.For judging whether the terminal is in metastable state, third processing module 22 is used for third judgment module 21
When the terminal is not in metastable state, the terminal is logical using Radio Link and WLAN progress downlink
Letter, fourth processing module 23 detect the light source transmitting for controlling the terminal when the terminal is in metastable state
Signal light with by visible optical link and the wireless LAN communication, and obtain the link parameter of visible optical link, the 5th
Processing module 24 initializes the visible optical link for handling the signal light, and feedback module 25 is for controlling the terminal
The link parameter is sent to the wireless access point by Radio Link.
In other words, step S21 can be realized by third judgment module 21, and step S22 can be by third processing module 22
It realizes, step S23 can be realized that step S24 can be realized by the 5th processing module 24, step S25 by fourth processing module 23
It can be realized by feedback module 25.
It is appreciated that when terminal is in the unstable states such as mobile, the visible light communication link of terminal and WLAN
Dtr signal.Terminal first detects the stable state of itself in downlink communication, then by status information feedback to WLAN,
Can be communicated with terminal in order to WLAN using suitable downstream communications link, reduce wireless communication system when
Prolong.
In some embodiments, terminal includes 3-axis acceleration sensor, and step S21 judges whether the terminal is in
Metastable state detects the acceleration in three directions of terminal including the use of the 3-axis acceleration sensor to judge
Whether that states terminal is in metastable state.
It is appreciated that 3-axis acceleration sensor can measure steric acceleration, the fortune of terminal can be accurately reflected comprehensively
Dynamic state.In addition, 3-axis acceleration sensor have the characteristics that it is small in size and light-weight, be desirably integrated into terminal without influence eventually
The overall volume at end.
Referring to Fig. 7, in some embodiments, the step S24 processing signal light is to initialize the visible light chain
Road includes following sub-step:
S241: judge whether the signal strength for the signal light that the terminal receives is greater than predetermined value；
S242: the synchronous gate of the visible optical link is improved when the signal strength of the signal light is greater than the predetermined value
Limit value；With
S243: the synchronous gate of the visible optical link is reduced when the intensity of the signal is less than or equal to the predetermined value
Limit value.
Referring to Fig. 8, in some embodiments, the 5th processing module 24 includes the 4th judgment module 241, the first adjustment
Module 242 and second adjustment module 243.4th judgment module 241 is used to judge the signal light that the terminal receives
Whether signal strength is greater than predetermined value, and the first adjustment module 242 is used to be greater than in the signal strength of the signal light described predetermined
Improve the synchronization threshold value of the visible optical link when value, second adjustment module 243 be used to be less than in the intensity of the signal or
The synchronization threshold value of the visible optical link is reduced when equal to the predetermined value.
In other words, step S241 can be realized by the 4th judgment module 241, and step S242 can be by the first adjustment module
242 realize, step S243 can be realized by second adjustment module 243.
It is appreciated that the effect that terminal data synchronizes is the start bit for the signal that detection receives, guarantee the accurate of data
It receives.If the synchronous synchronization threshold value setting of data is excessively high, terminal can not detect the initial position of signal, if data are synchronous
The setting of synchronization threshold value it is too low, then the case where being likely to occur data synchronous error.In this way, the signal light received according to terminal
Signal strength adjust synchronous threshold value, to guarantee accurate synchronization and the reception of data.
The terminal of embodiment of the present invention includes the control device 20 for controlling the terminal for using WLAN.Such as
This, terminal has the ability of detection displacement state, and displacement state is fed back to WLAN so as to wireless office
Domain net is carried out data transmission using suitable downlink transfer link, guarantees the accuracy and reliability of communication.
Referring to Fig. 9, the wireless communication system of embodiment of the present invention includes WLAN and terminal.In this way, wireless
Detection of the communication system based on terminal steady state selects suitable downlink transfer link so as to WLAN, improves wireless
The efficiency of transmission of communication system, reduces time delay.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Each functional unit in various embodiments of the present invention can integrate in a processing module, be also possible to each
A unit physically exists alone, and can also be integrated in a module with two or more units.Above-mentioned integrated module was both
It can take the form of hardware realization, can also be realized in the form of software function module.
Although embodiments of the present invention have been shown and described above, it is to be understood that above embodiment is
Illustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be right
Above-mentioned implementation implementation is changed, modifies, replacement and variant.
Claims (14)
1. a kind of control method of visible light downlink communication Detection of Stability, for controlling WLAN, which is characterized in that institute
Stating WLAN includes wireless access point and light source, the control method the following steps are included:
Judge whether to receive the information in metastable state with the terminal of wireless LAN communication feedback；
Light source transmitting signal light is controlled when receiving the information to communicate by visible optical link with the terminal, institute
It states terminal and detects the signal light to obtain the link parameter of visible optical link, and pass through Radio Link to the wireless access point
Send the link parameter；With
Downlink communication is carried out using Radio Link and the terminal when not receiving the information.
2. control method as described in claim 1, which is characterized in that the letter in metastable state of the terminal feedback
Breath feeds back the information including the use of Radio Link.
3. control method as described in claim 1, which is characterized in that the parameter of the visible optical link includes the visible light
The signal-to-noise ratio and signal strength of link.
4. control method as described in claim 1, which is characterized in that the control method further comprises the steps of:
Judge whether the link parameter of the visible optical link is greater than preset threshold；With
It will corresponding speed according to the parameter of the visible optical link when the link parameter of the visible optical link is greater than preset threshold
The communication data of rate distributes to the visible optical link.
5. a kind of control device of visible light downlink communication Detection of Stability, for controlling WLAN, which is characterized in that institute
Stating WLAN includes wireless access point and light source, and the control device includes:
First judgment module, the first judgment module is for judging whether to receive the terminal with the wireless LAN communication
The information in metastable state of feedback；
First processing module, the first processing module is for controlling the light source transmitting signal light when receiving the information
To be communicated by visible optical link with the terminal, the terminal detects the signal light to obtain the link of visible optical link ginseng
Number, and the link parameter is sent to the wireless access point by Radio Link；With
Second processing module, the Second processing module were used for when not receiving the information using Radio Link and the end
End carries out downlink communication.
6. control device as claimed in claim 5, which is characterized in that the control device further include:
Second judgment module, second judgment module are default for judging whether the link parameter of the visible optical link is greater than
Threshold value；With
Distribution module, the distribution module are used for when the link parameter of the visible optical link is greater than preset threshold according to
It can be seen that the communication data of corresponding speed is distributed to the visible optical link by the parameter of optical link.
7. a kind of WLAN, it is characterised in that including control device described in claim 5 or 6.
8. a kind of control method of visible light downlink communication Detection of Stability, for controlling the terminal for using WLAN,
Be characterized in that, the WLAN includes wireless access point and light source, the control method the following steps are included:
Judge whether the terminal is in metastable state；
Controlled when the terminal is not in metastable state the terminal using Radio Link and the WLAN into
Row downlink communication；
The terminal is controlled when the terminal is in metastable state detects the signal light of light source transmitting with by can
Light-exposed link and the wireless LAN communication, and obtain the link parameter of visible optical link；
The signal light is handled to initialize the visible optical link；With
It controls the terminal and the link parameter is sent to the wireless access point by Radio Link.
9. control method as claimed in claim 8, which is characterized in that the terminal includes 3-axis acceleration sensor, described
Judge whether the terminal is in metastable state including the use of described three, terminal of 3-axis acceleration sensor detecting
The acceleration in direction with judge the terminal whether in metastable state.
10. control method as claimed in claim 8, which is characterized in that the processing signal light with initialize it is described can
Light-exposed link includes following sub-step:
Judge whether the signal strength for the signal light that the terminal receives is greater than predetermined value；
The synchronization threshold value of the visible optical link is improved when the signal strength of the signal light is greater than the predetermined value；With
The intensity of the signal reduces the synchronization threshold value of the visible optical link when being less than or equal to the predetermined value.
11. a kind of control device of visible light downlink communication Detection of Stability, for controlling the terminal for using WLAN,
It is characterized in that, the WLAN includes wireless access point and light source, and the control device includes:
Third judgment module, the third judgment module is for judging whether the terminal is in metastable state；
Third processing module, the third processing module are used for the terminal when the terminal is not in metastable state and adopt
Downlink communication is carried out with Radio Link and the WLAN；
Fourth processing module, the fourth processing module is for controlling the terminal when the terminal is in metastable state
The signal light of the light source transmitting is detected to pass through visible optical link and the wireless LAN communication, and obtains visible optical link
Link parameter；
5th processing module, the 5th processing module is for handling the signal light to initialize the visible optical link；With
Feedback module, the feedback module is for controlling the terminal by Radio Link to described in wireless access point transmission
Link parameter.
12. control device as claimed in claim 11, which is characterized in that the third processing module includes:
4th judgment module, the signal strength for the signal light that the 4th judgment module is used to judge that the terminal receives
Whether predetermined value is greater than；
The first adjustment module, the first adjustment module are used to mention when the signal strength of the signal light is greater than the predetermined value
The same threshold values of the high visible optical link；With
Second adjustment module, the second adjustment module are used to drop when the intensity of the signal is less than or equal to the predetermined value
The synchronization threshold value of the low visible optical link.
13. a kind of terminal, which is characterized in that the terminal includes control device described in claim 11 or 12.
14. a kind of wireless communication system, characterized by comprising:
WLAN as claimed in claim 7；With
Terminal described in claim 13.
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| CN115087063A (en) * | 2021-03-15 | 2022-09-20 | 中国移动通信有限公司研究院 | Optical communication link state feedback method, receiving method, device and equipment |
| CN113766522B (en) * | 2021-09-30 | 2022-08-02 | 中国电信股份有限公司 | VLC-RF heterogeneous network deployment method, device, equipment and medium based on room division system |
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|---|---|---|---|---|
| CN103427903A (en) * | 2013-08-14 | 2013-12-04 | 东南大学 | Visible light communication system based on wireless access point |
| CN105553553A (en) * | 2015-12-24 | 2016-05-04 | 南京邮电大学 | Network transmission scheme based on joint of VLC (Visible Light Communication) and WiFi |
| CN205283542U (en) * | 2015-12-20 | 2016-06-01 | 南京邮电大学 | VLC who supports VLC+WiFi to unite access system sends terminal |
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| JP4922889B2 (en) * | 2006-11-06 | 2012-04-25 | パナソニック株式会社 | Optical space transmission system for performing optical space transmission and optical transmitter used therefor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427903A (en) * | 2013-08-14 | 2013-12-04 | 东南大学 | Visible light communication system based on wireless access point |
| CN205283542U (en) * | 2015-12-20 | 2016-06-01 | 南京邮电大学 | VLC who supports VLC+WiFi to unite access system sends terminal |
| CN105553553A (en) * | 2015-12-24 | 2016-05-04 | 南京邮电大学 | Network transmission scheme based on joint of VLC (Visible Light Communication) and WiFi |
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