CN105429703A - Mobile terminal interaction system and method based on visible light communication - Google Patents
Mobile terminal interaction system and method based on visible light communication Download PDFInfo
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- CN105429703A CN105429703A CN201510698891.7A CN201510698891A CN105429703A CN 105429703 A CN105429703 A CN 105429703A CN 201510698891 A CN201510698891 A CN 201510698891A CN 105429703 A CN105429703 A CN 105429703A
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- terminal
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- visible light
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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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/502—LED transmitters
-
- 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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a mobile terminal interaction system and a method based on visible light communication, and relates to the field of the application of visible light communication. The system comprises a sending terminal and a receiving terminal, the sending terminal and the receiving terminal both comprises an LED lamp and a camera, and the sending terminal and the receiving terminal both turn on the LED lamps and are arranged in an opposite manner with short distance. At the sending terminal, to-be-sent data is modulated by employing a specific modulation format after channel coding, information is modulated to the LED lamp, and flickering visible light is emitted; the receiving terminal shoots the flicker of the LED lamp of the sending terminal via the camera and obtains the information via demodulation and decoding; and the sending terminal and the receiving terminal follow the same data coding rule and transmission protocol, two-way transmission is realized via the protocol, and during reverse transmission, the sending terminal and the receiving terminal are exchanged, and the above process is repeated. According to the system and the method, the LED lamps and the cameras are regarded as transmit-receive hardware, the information is loaded to visible light emitted by the LED lamps, and short-distance bidirectional continuous transmission can be realized.
Description
Technical field
The present invention relates to visible light communication application, specifically relate to a kind of system and method mutual based on the mobile terminal of visible light communication.
Background technology
Mobile terminal refers to the computer equipment that can use in movement, and saying of broad sense comprises mobile phone, notebook, panel computer etc., but refers to mobile phone in most cases or have smart mobile phone and the panel computer of multiple application function.Along with network and technology are towards the development in more and more broadband direction, Mobile Communication Industry will move towards the real mobile message epoch.On the other hand, along with the develop rapidly of integrated circuit technique, the disposal ability of mobile terminal has had powerful disposal ability, and mobile terminal becomes an integrated information processing platform from simple call instrument, and this also brings broader development space to mobile terminal.
Mobile terminal is through being usually used in in-plant Message Transmission, such as: mobile phone (especially present smart mobile phone) has been widely used in paying, exchanges visiting cards, has read website links etc., mobile phone by reading bar code, Quick Response Code acquisition message, also can use sound wave pass-along message usually.Existing short-range communication mode utilizes the hardware such as camera, loud speaker, microphone of mobile phone more, can read the character string of a section shorter (normal length <1k) at closely (10cm ~ 1m).But can only realize unidirectional delivery information, the mobile phone of receiving terminal can obtain picture or sound, but reverse transfer can not realize information interaction; Further, the transfer rate of this short-range communication mode and the length of transmission of information all more limited, limit the application scenarios of mobile terminal.
Summary of the invention
The object of the invention is the deficiency in order to overcome above-mentioned background technology, a kind of system and method mutual based on the mobile terminal of visible light communication is provided, using the LED of mobile terminal and camera as transmitting-receiving hardware, information is loaded on visible ray that LED sends, realizes the transmission of near distance bidirectional continuous print.
The invention provides a kind of system mutual based on the mobile terminal of visible light communication, comprise transmitting terminal and receiving terminal, described transmitting terminal, receiving terminal include LED and camera, transmitting terminal and receiving terminal all have certain information processing capability: the flicker that flickers controlling LED according to information to be modulated, carry out demodulating and decoding to reception light and obtain information, the frame number of camera shooting per second determines the maximum receiving velocity of data;
Transmitting terminal, receiving terminal all open LED, and subtend is closely placed, and between transmitting terminal, receiving terminal, dull thread blocks and relatively fixing, are beneficial to the LED luminance of camera shooting opposite end;
At transmitting terminal, data to be sent, first through chnnel coding, re-use specific modulation format and modulate, then by modulates information in LED, send the visible ray of flicker;
At receiving terminal, the flicker change of transmitting terminal LED under the image recording sensor of camera, according to sampling principle judgement data 0/1, modulation format according to a preconcerted arrangement carries out demodulation again, finally carry out channel-decoding and obtain data, the agreement process on the modulation format wherein transmitted, chnnel coding, upper strata is defined by user oneself;
Transmitting terminal and receiving terminal follow identical data encoding rule and host-host protocol, and by protocol realization transmitted in both directions, when reverse transfer, transmitting terminal and receiving terminal are exchanged, and repeat said process.
On the basis of technique scheme, the frame number of described camera shooting per second is more than 2 times of the maximum receiving velocity of data.
On the basis of technique scheme, described camera, according to anchor-frame speed photographic images, observe the change that flickers of LED, and judgement is 1 or 0.
On the basis of technique scheme, described camera is by zoom, and adjustment LED position size in the picture, to realize stable shooting and identification.
On the basis of technique scheme, described mobile terminal comprises mobile phone, notebook, panel computer.
The present invention also provides a kind of method mutual based on the mobile terminal of visible light communication, comprises the following steps:
Transmitting terminal, receiving terminal include LED and camera, transmitting terminal and receiving terminal all have certain information processing capability: the flicker that flickers controlling LED according to information to be modulated, carry out demodulating and decoding to reception light and obtain information, the frame number of camera shooting per second determines the maximum receiving velocity of data;
Transmitting terminal, receiving terminal all open LED, and subtend is closely placed, and between transmitting terminal, receiving terminal, dull thread blocks and relatively fixing, are beneficial to the LED luminance of camera shooting opposite end;
At transmitting terminal, data to be sent, first through chnnel coding, re-use specific modulation format and modulate, then by modulates information in LED, send the visible ray of flicker;
At receiving terminal, the flicker change of transmitting terminal LED under the image recording sensor of camera, according to sampling principle judgement data 0/1, modulation format according to a preconcerted arrangement carries out demodulation again, finally carry out channel-decoding and obtain data, the agreement process on the modulation format wherein transmitted, chnnel coding, upper strata is defined by user oneself;
Transmitting terminal and receiving terminal follow identical data encoding rule and host-host protocol, and by protocol realization transmitted in both directions, when reverse transfer, transmitting terminal and receiving terminal are exchanged, and repeat said process.
On the basis of technique scheme, the frame number of described camera shooting per second is more than 2 times of the maximum receiving velocity of data.
On the basis of technique scheme, described camera, according to anchor-frame speed photographic images, observe the change that flickers of LED, and judgement is 1 or 0.
On the basis of technique scheme, described camera is by zoom, and adjustment LED position size in the picture, to realize stable shooting and identification.
On the basis of technique scheme, described mobile terminal comprises mobile phone, notebook, panel computer.
Compared with prior art, advantage of the present invention is as follows:
LED (LightEmittingDiode, light-emitting diode) is called as forth generation lighting source or green light source, has the features such as energy-saving and environmental protection, the life-span is long, volume is little, has been widely used in instruction and illumination.On the consumption electronic products such as mobile phone, LED is normally used for light filling and illumination, has become indispensable mobile phone configuration.Because LED has good modulating characteristic, load signal can realize wireless light communication as while light source, therefore may be used for realizing the application of a series of expanding communication.The present invention is on the hardware of existing mobile terminal and the basis of disposal ability, a kind of interactive mode based on visible light communication is newly proposed, using the LED of mobile terminal and camera (or remaining image inductor) as transmitting-receiving hardware, information is loaded on visible ray that LED sends, mobile terminal carries out information transmit-receive and algorithm process, realize information between mobile terminal closely, two-way, at a high speed, continuous transmission, not only be easy to carry, and hardware cost is extremely low, visible light communication can control the direction that light signal sends, thus there is very high confidentiality, there is larger practical value.
Accompanying drawing explanation
Fig. 1 is schematic diagram mutual based on the mobile terminal of visible light communication in the embodiment of the present invention;
Fig. 2 sends and the schematic diagram received based on the data of visible light communication in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
The embodiment of the present invention provides a kind of system mutual based on the mobile terminal of visible light communication, comprises transmitting terminal and receiving terminal, and transmitting terminal, receiving terminal include LED and camera.Transmitting terminal and receiving terminal all have certain information processing capability, can control the flicker that flickers of LED according to information to be modulated, and also can carry out demodulating and decoding to reception light and obtain information, the frame number of camera shooting per second determines the maximum receiving velocity of data.
The embodiment of the present invention provides a kind of method mutual based on the mobile terminal of visible light communication, comprises the following steps:
Transmitting terminal, receiving terminal all open LED, and subtend is closely placed, and between transmitting terminal, receiving terminal, dull thread blocks and relatively fixing, are beneficial to the LED luminance of camera shooting opposite end;
At transmitting terminal, data to be sent, first through chnnel coding, re-use specific modulation format and modulate, then by modulates information in LED, send the visible ray of flicker;
At receiving terminal, the flicker change of transmitting terminal LED under the image recording sensor of camera, according to sampling principle judgement data 0/1, modulation format according to a preconcerted arrangement carries out demodulation again, finally carry out channel-decoding and obtain data, the agreement process on the modulation format wherein transmitted, chnnel coding, upper strata is defined by user oneself;
Transmitting terminal and receiving terminal follow identical data encoding rule and host-host protocol, and by protocol realization transmitted in both directions, when reverse transfer, transmitting terminal and receiving terminal are exchanged, and repeat said process.
Mobile terminal comprises mobile phone, notebook, panel computer etc.Be described in detail for mobile phone below.
Shown in Figure 1, the LED of mobile phone and camera are all positioned at the mobile phone back side, and two cell phone back are in the face of to when closely placing, and between two mobile phones, dull thread blocks and relatively fixing, and the camera of mobile phone can take the LED luminance of subtend mobile phone.Mobile phone is by camera zoom, and adjustment LED position size in the picture, to realize stable shooting and identification.
The principle of the embodiment of the present invention is as follows:
Using the LED of mobile terminal and camera as transmitting-receiving hardware, information is loaded on visible ray that LED sends, realizes the transmission of near distance bidirectional continuous print.
Shown in Figure 2, at transmitting terminal, data to be sent, first through chnnel coding, for avoiding error code, need select suitable chnnel coding, such as CRC, RS code; Re-use specific modulation format to modulate, such as: OOK (On-OffKeying, on-off keying) modulation format; Then driving LED lamp sends visible ray.At receiving terminal, the flicker change of LED under the image recording sensor of camera, according to sampling principle judgement data 0/1, modulation format according to a preconcerted arrangement carries out demodulation again, finally carry out channel-decoding and obtain data, the agreement process on the modulation format wherein transmitted, chnnel coding, upper strata is defined by user oneself.
Flicker can be discovered according to human eye, LED can adopt lower frequency (as 50Hz) to glimmer or upper frequency flicker (as 200Hz), the camera of mobile terminal is according to anchor-frame speed photographic images, and that observes LED flickers that to change and adjudicate be 1 or 0.According to sampling principle, the frame number of the camera shooting per second of mobile terminal is more than 2 times of the maximum receiving velocity of data.
For reducing the impact of LED lamplight reflection on receiving terminal, by adjustment transmission range and angle, control the reflection of light.Speed is not being had to the occasion of high request, single work can be used to transmit, when namely the LED of transmitting terminal sends, the LED of receiving terminal is closed.
For improving the confidentiality of communication, also setting up reliable connection by agreement, or carrying out shading treatment.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if these amendments and modification are within the scope of the claims in the present invention and equivalent technologies thereof, then these revise and modification also within protection scope of the present invention.
The prior art that the content do not described in detail in specification is known to the skilled person.
Claims (10)
1. one kind based on the mutual system of the mobile terminal of visible light communication, comprise transmitting terminal and receiving terminal, it is characterized in that: described transmitting terminal, receiving terminal include LED and camera, transmitting terminal and receiving terminal all have certain information processing capability: the flicker that flickers controlling LED according to information to be modulated, carry out demodulating and decoding to reception light and obtain information, the frame number of camera shooting per second determines the maximum receiving velocity of data;
Transmitting terminal, receiving terminal all open LED, and subtend is closely placed, and between transmitting terminal, receiving terminal, dull thread blocks and relatively fixing, are beneficial to the LED luminance of camera shooting opposite end;
At transmitting terminal, data to be sent, first through chnnel coding, re-use specific modulation format and modulate, then by modulates information in LED, send the visible ray of flicker;
At receiving terminal, the flicker change of transmitting terminal LED under the image recording sensor of camera, according to sampling principle judgement data 0/1, modulation format according to a preconcerted arrangement carries out demodulation again, finally carry out channel-decoding and obtain data, the agreement process on the modulation format wherein transmitted, chnnel coding, upper strata is defined by user oneself;
Transmitting terminal and receiving terminal follow identical data encoding rule and host-host protocol, and by protocol realization transmitted in both directions, when reverse transfer, transmitting terminal and receiving terminal are exchanged, and repeat said process.
2., as claimed in claim 1 based on the system that the mobile terminal of visible light communication is mutual, it is characterized in that: the frame number of described camera shooting per second is more than 2 times of the maximum receiving velocity of data.
3. as claimed in claim 1 based on the system that the mobile terminal of visible light communication is mutual, it is characterized in that: described camera, according to anchor-frame speed photographic images, observe the change that flickers of LED, and judgement is 1 or 0.
4. as claimed in claim 1 based on the system that the mobile terminal of visible light communication is mutual, it is characterized in that: described camera is by zoom, and adjustment LED position size in the picture, to realize stable shooting and identification.
5. the system mutual based on the mobile terminal of visible light communication according to any one of Claims 1-4, is characterized in that: described mobile terminal comprises mobile phone, notebook, panel computer.
6. based on the method that the mobile terminal of visible light communication is mutual, it is characterized in that, comprise the following steps:
Transmitting terminal, receiving terminal include LED and camera, transmitting terminal and receiving terminal all have certain information processing capability: the flicker that flickers controlling LED according to information to be modulated, carry out demodulating and decoding to reception light and obtain information, the frame number of camera shooting per second determines the maximum receiving velocity of data;
Transmitting terminal, receiving terminal all open LED, and subtend is closely placed, and between transmitting terminal, receiving terminal, dull thread blocks and relatively fixing, are beneficial to the LED luminance of camera shooting opposite end;
At transmitting terminal, data to be sent, first through chnnel coding, re-use specific modulation format and modulate, then by modulates information in LED, send the visible ray of flicker;
At receiving terminal, the flicker change of transmitting terminal LED under the image recording sensor of camera, according to sampling principle judgement data 0/1, modulation format according to a preconcerted arrangement carries out demodulation again, finally carry out channel-decoding and obtain data, the agreement process on the modulation format wherein transmitted, chnnel coding, upper strata is defined by user oneself;
Transmitting terminal and receiving terminal follow identical data encoding rule and host-host protocol, and by protocol realization transmitted in both directions, when reverse transfer, transmitting terminal and receiving terminal are exchanged, and repeat said process.
7., as claimed in claim 6 based on the method that the mobile terminal of visible light communication is mutual, it is characterized in that: the frame number of described camera shooting per second is more than 2 times of the maximum receiving velocity of data.
8. as claimed in claim 6 based on the method that the mobile terminal of visible light communication is mutual, it is characterized in that: described camera, according to anchor-frame speed photographic images, observe the change that flickers of LED, and judgement is 1 or 0.
9. as claimed in claim 6 based on the method that the mobile terminal of visible light communication is mutual, it is characterized in that: described camera is by zoom, and adjustment LED position size in the picture, to realize stable shooting and identification.
10. the method mutual based on the mobile terminal of visible light communication according to any one of claim 6 to 9, is characterized in that: described mobile terminal comprises mobile phone, notebook, panel computer.
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| CN201510698891.7A CN105429703A (en) | 2015-10-22 | 2015-10-22 | Mobile terminal interaction system and method based on visible light communication |
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Cited By (20)
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| CN105719166A (en) * | 2016-03-28 | 2016-06-29 | 华南理工大学 | Shopping guide method based on Zigbee communication and visible light communication and system achieving method |
| CN105897968A (en) * | 2016-05-31 | 2016-08-24 | 京东方科技集团股份有限公司 | Mobile terminal |
| CN105953786A (en) * | 2016-04-20 | 2016-09-21 | 清华大学 | Indoor precise positioning method and system based on imaging communication |
| CN106209230A (en) * | 2016-07-11 | 2016-12-07 | 中国科学院上海技术物理研究所 | A kind of visible light communication system identifying striations code based on APP |
| CN106253981A (en) * | 2016-07-26 | 2016-12-21 | 维沃移动通信有限公司 | A kind of data transmission method and the first electronic equipment |
| CN106452580A (en) * | 2016-06-30 | 2017-02-22 | 华南理工大学 | Visible light communication coding method compatible with smartphone camera and system thereof |
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| CN106604505A (en) * | 2016-12-26 | 2017-04-26 | 广州力控智电信息科技有限公司 | Method and device for acquiring state information of specific lamp in multi-lamp illumination system by means of light flashing |
| CN106953690A (en) * | 2017-04-19 | 2017-07-14 | 浙江工业大学 | Smart machine near field communication system based on visible ray |
| CN106953691A (en) * | 2017-04-20 | 2017-07-14 | 上海第二工业大学 | A kind of time-multiplexed visible ray full duplex communication system of up-downgoing and method |
| CN107231247A (en) * | 2016-03-24 | 2017-10-03 | 阔展科技(深圳)有限公司 | The method and device of information is transmitted to other equipment with the LED of smart mobile phone |
| CN107425911A (en) * | 2017-07-27 | 2017-12-01 | 南开大学 | A kind of communication terminal visible data transmitting device and transmission method |
| CN108242188A (en) * | 2017-12-29 | 2018-07-03 | 佛山市幻云科技有限公司 | Examination system and method based on visible light communication |
| CN108270974A (en) * | 2018-03-07 | 2018-07-10 | 华南理工大学 | A kind of high speed camera and its communication means for communicating under visible ray dynamic environment |
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| CN106534369A (en) * | 2016-12-19 | 2017-03-22 | 浙江宇视科技有限公司 | Communication method and device |
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| CN106604505A (en) * | 2016-12-26 | 2017-04-26 | 广州力控智电信息科技有限公司 | Method and device for acquiring state information of specific lamp in multi-lamp illumination system by means of light flashing |
| CN106953690A (en) * | 2017-04-19 | 2017-07-14 | 浙江工业大学 | Smart machine near field communication system based on visible ray |
| CN106953690B (en) * | 2017-04-19 | 2019-10-22 | 浙江工业大学 | Smart machine near field communication system based on visible light |
| CN106953691B (en) * | 2017-04-20 | 2020-02-28 | 上海第二工业大学 | Uplink and downlink time division multiplexing visible light full duplex communication system and method |
| CN106953691A (en) * | 2017-04-20 | 2017-07-14 | 上海第二工业大学 | A kind of time-multiplexed visible ray full duplex communication system of up-downgoing and method |
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| CN108242188A (en) * | 2017-12-29 | 2018-07-03 | 佛山市幻云科技有限公司 | Examination system and method based on visible light communication |
| CN108270974A (en) * | 2018-03-07 | 2018-07-10 | 华南理工大学 | A kind of high speed camera and its communication means for communicating under visible ray dynamic environment |
| CN111525958A (en) * | 2020-04-08 | 2020-08-11 | 湖南大学 | Optical camera communication system with data communication and gesture action recognition functions |
| CN111525958B (en) * | 2020-04-08 | 2023-02-03 | 湖南大学 | Optical camera communication system with data communication and gesture action recognition functions |
| CN114500861A (en) * | 2020-10-27 | 2022-05-13 | 深圳绿米联创科技有限公司 | Control method and device of light source, electronic equipment and computer readable storage medium |
| CN112181183A (en) * | 2020-11-13 | 2021-01-05 | 维沃移动通信有限公司 | Stylus, electronic device, control method, control device, and readable storage medium |
| CN115314642A (en) * | 2021-05-08 | 2022-11-08 | 四川大学 | Camera optical communication system based on multi-pixel accumulation and implementation method |
| CN115314642B (en) * | 2021-05-08 | 2024-03-12 | 四川大学 | Camera optical communication system based on multi-pixel accumulation and implementation method |
| CN113315575A (en) * | 2021-06-01 | 2021-08-27 | 天津大学 | Visual optical communication method of self-adaptive threshold decoding |
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