CN103684594A - Encoding method based on visible light communication - Google Patents
Encoding method based on visible light communication Download PDFInfo
- Publication number
- CN103684594A CN103684594A CN201210319209.5A CN201210319209A CN103684594A CN 103684594 A CN103684594 A CN 103684594A CN 201210319209 A CN201210319209 A CN 201210319209A CN 103684594 A CN103684594 A CN 103684594A
- Authority
- CN
- China
- Prior art keywords
- high level
- signal
- visible light
- light communication
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Optical Communication System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses an encoding method based on visible light communication. A visible light signal which is sent by a mobile phone flash light can be encoded, bit-2 signals are represented by the number of high electric levels, the high electric levels are in one-to-one correspondence with the bit-2 signals, the bit-2 signals are divided by groups, one byte is represented by four groups of bit-2 signals, and the sending cycles of the groups of signals are identical. The method has the advantages that the encoding mode is simple, and the encoded signals are stably transmitted with short delay. Besides, as the sending cycles of the groups of signals are identical, the sending time of the signals does not change due to the difference of sent signals, and the signal sending speed is high.
Description
Technical field
The present invention relates to visible light communication field, relate to particularly a kind of coding method of visible light communication.
Background technology
Visible light communication is a kind of in technical emerging, the short distance high-speed radio optical communication technique growing up of LED.The basic principle of visible light communication utilizes light-emitting diode (LED) than fluorescent lamp and the fast feature of incandescent lamp switch speed exactly, by the high-frequency of LED light source, glimmer to communicate, have light to represent 1, unglazedly represent 0, send light signal at a high speed, then pass through opto-electronic conversion and acquired information.Wireless light communication technology is because its data are difficult for disturbed and catch, and optical communication equipment is made simple and should not be damaged or demagnetization, can be used for making wireless optical encryption key pair.Compare with microwave technology, wireless light communication has quite abundant frequency spectrum resource, and this is that general microwave communication and radio communication are incomparable; Visible light communication can be suitable for any communication protocol, be applicable to any environment simultaneously; Aspect fail safe, it compares traditional magnetic material, without worrying demagnetization problem, more needn't worry that Content of Communication stolen by people; The equipment of wireless light communication sets up convenient flexibly, and with low cost, is applicable to extensive popularization and application.
Internet of Things be one based on information carriers such as the Internet, conventional telecommunications nets, allow and allly can be realized the networks interconnect by the General Physics object of independent addressing.Internet of Things refers to ubiquitous end-equipment and facility, by various wireless or wired long distances or short distance communication network, realize and interconnecting, the management and service functions such as the controlled and even personalized real time on-line monitoring of safety, location are reviewed, alarm linkage, dispatch control, program management, Long-distance Control, safety precaution, long-range repair and maintenance, online upgrading, statistical report form, decision support, leader's desktop are provided, and " pipe, control, the battalion " that realizes efficient, energy-conservation, safety to equipment, environmental protection is integrated.Traditional Internet of Things is generally realized and being interconnected by various wireless or wired communication networks, adopts traditional communication technology.Traditional Internet of Things is generally realized and being interconnected by various wireless or wired communication networks, adopts traditional communication technology.
In prior art, visible light communication is applied in Internet of Things, is commonly called as photon Internet of Things.Photon Internet of Things utilizes LED or mobile phone flashlight to send stroboscopic signal, as the medium of the radio transmission of photon Internet of Things, after closely propagating, then passes through opto-electronic conversion and acquired information.The directive property of visible ray is high, can not penetrate barrier, than using the Internet of Things of communication to have higher fail safe.Therefore how the visible light signal of stroboscopic encoded and guarantee that signal stabilization, the time delay of coding are little, becoming the problem of needing solution badly in visible light communication technology.
Summary of the invention
The technical problem that the present invention solves is, a kind of coding method based on visible light communication is provided, and the method coding is simple, few through stable signal transmission, the time delay of coding, and the cycle that signal sends is constant, and signalling speed is very fast.
The technical solution adopted for the present invention to solve the technical problems is, a kind of coding method based on visible light communication is provided, the visible ray coding that mobile phone flashlight can be sent, the signal that represents 2 bits by the number of high level, high level is corresponding one by one with the signal of 2 bits, the signal of 2 bits is divided by group, byte of signal indication of four group of 2 bit, and the cycle of every group of signal transmission is identical.
In the preferred embodiment of the present invention, 1 high level represents that 00,2 high level represents that 01,3 high level represents that 10,4 high level represent 11.
In the preferred embodiment of the present invention, low level represents that 00,1 high level represents that 01,2 high level represents that 10,3 high level represent 11.
In the preferred embodiment of the present invention, 1 high level represents that 00,2 high level represents that 10,3 high level represent that 01,4 high level represents 11.
In the preferred embodiment of the present invention, 1 high level represents that 11,2 high level represent that 10,3 high level represent that 01,4 high level represents 00.
In the preferred embodiment of the present invention, the cycle of every group of signal transmission is 57-63ms.
In the preferred embodiment of the present invention, be not less than 1ms the time of delay of high level.
In the preferred embodiment of the present invention, be 5ms the time of delay of high level.
In the preferred embodiment of the present invention, in every group of signal, be not more than half of low level between every group of signal time of delay low level time of delay.
In the preferred embodiment of the present invention, in every group of signal, between low level time of delay, every group of signal, low level time of delay and sum time of delay of every group of signal high level equal cycle of every group of signal transmission.
Beneficial effect of the present invention is, a kind of coding method based on visible light communication is provided, the method coded system is simple, stable signal transmission, time delay after coding are few, in addition, the cycle that every group of signal of the present invention sends is identical, so the transmitting time of signal is because the difference of transmitted signal changes, and signalling speed is fast.
Accompanying drawing explanation
Fig. 1, first preferred embodiment of the invention signal schematic representation;
Fig. 2, second preferred embodiment of the invention signal schematic representation;
Fig. 3, third preferred embodiment of the invention signal schematic representation;
Fig. 4, four preferred embodiment of the invention signal schematic representation.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be further described.
The invention provides a kind of coding method based on visible light communication, the stroboscopic visible ray that mobile phone flashlight can be sent and the visible ray of other stroboscopics coding, the signal that represents 2 bits by the number of high level, the signal of 2 bits has 4 types: 00, 01, 10, 11, high level is 0 namely during low level, also can represent the signal of 2 bits, during coding, the signal of high level number and 2 bits is one to one, the signal of 2 bits is divided by group, byte of signal indication of four group of 2 bit, the cycle of every group of signal transmission is identical, adopt the method for fixed cycle to send different signals, the transmitting time of signal is not because the difference of transmitted signal changes, and then reduce low level time of delay in every group of signal, signal is sent more stable, speed is faster.
The cycle that every group of signal of the present invention sends is 57-63ms, and in every group of signal, between low level time of delay, every group of signal, low level time of delay and sum time of delay of every group of signal high level equal cycle of every group of signal transmission.
High level of the present invention time of delay is for being not less than 1ms, preferably 5ms.
Should be appreciated that half that is not more than low level time of delay in every group of signal low level between every group of signal time of delay, according to low level between every group of signal, can distinguish two groups of different signals time of delay.
When mobile phone flashlight sends the visible light frequency of stroboscopic and is greater than 1ms, this stroboscopic visible ray is encoded in available coding method of the present invention, preferably 5ms, 10ms.
Embodiment 1
If 1 high level represents that 00,2 high level represents that 01,3 high level represents that 10,4 high level represent 11, the signal transmission cycle is 60ms, be 5ms the time of delay of high level, the signal schematic representation sending by this coding method is referring to Fig. 1, first preferred embodiment of the invention signal schematic representation, the signal that the present embodiment sends is 00011011.
Embodiment 2
If low level represents 00,1 high level and represents that 01,2 high level represents that 10,3 high level represent 11, the signal transmission cycle is 59ms, be 5ms the time of delay of high level, the signal schematic representation sending by this coding method is referring to Fig. 2, second preferred embodiment of the invention signal schematic representation, the signal that represents 2 bits by low level, reduced the number of high level, make signal more stable, simultaneously, the total transmitting time of signal can not change because transmitted signal is different, and what the present embodiment sent is 01110010.
Embodiment 3
If 1 high level represents that 00,2 high level represents that 10,3 high level represent that 01,4 high level represents 11, the signal transmission cycle is 63ms, be 4.7ms the time of delay of high level, the signal schematic representation sending by this coding method is referring to Fig. 3, third preferred embodiment of the invention signal schematic representation, the signal that the present embodiment sends is 00100111.
Embodiment 4
If 1 high level represents that 11,2 high level represent that 10,3 high level represent that 01,4 high level represents 00, the signal transmission cycle is 57ms, be 5.2ms the time of delay of high level, the signal schematic representation sending by this coding method is referring to Fig. 4, four preferred embodiment of the invention signal schematic representation, the signal that the present embodiment sends is 11100100.
Above embodiment is only schematic, 1 high level also can represent 10 or 01,2 high level also can represent 00 or 11, in like manner analogize, the one-to-one relationship of high level number and 2 bit signals can need to arrange according to user, and in addition, user can be according to the steadiness of actual transmission signal, suitably reduce the cycle that every group of signal sends, improve transmission speed and the efficiency of transmission of signal.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.
Claims (10)
1. the coding method based on visible light communication, the visible ray coding that mobile phone flashlight can be sent, it is characterized in that, the signal that represents 2 bits by the number of high level, described high level is corresponding one by one with the signal of described 2 bits, the signal of described 2 bits is divided by group, byte of signal indication of 2 bits described in four groups, and the cycle that described in every group, signal sends is identical.
2. the coding method based on visible light communication according to claim 1, is characterized in that, 1 high level represents that 00,2 high level represents that 01,3 high level represents that 10,4 high level represent 11.
3. the coding method based on visible light communication according to claim 1, is characterized in that, low level represents that 00,1 high level represents that 01,2 high level represents that 10,3 high level represent 11.
4. the coding method based on visible light communication according to claim 1, is characterized in that, 1 high level represents that 00,2 high level represents that 10,3 high level represent that 01,4 high level represents 11.
5. the coding method based on visible light communication according to claim 1, is characterized in that, 1 high level represents that 11,2 high level represent that 10,3 high level represent that 01,4 high level represents 00.
6. the coding method based on visible light communication according to claim 1, is characterized in that, the cycle that described in every group, signal sends is 57-63ms.
7. the coding method based on visible light communication according to claim 1, is characterized in that, is not less than 1ms the time of delay of described high level.
8. the coding method based on visible light communication according to claim 7, is characterized in that, be 5ms the time of delay of described high level.
9. the coding method based on visible light communication according to claim 1, is characterized in that, is not more than described in every group half of low level between signal time of delay described in every group in signal low level time of delay.
10. the coding method based on visible light communication according to claim 9, it is characterized in that, between signal, low level time of delay and sum time of delay of signal high level described in every group equal cycle of signal transmission described in every group described in low level time of delay in signal described in every group, every group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210319209.5A CN103684594B (en) | 2012-08-31 | Coded method based on visible light communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210319209.5A CN103684594B (en) | 2012-08-31 | Coded method based on visible light communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103684594A true CN103684594A (en) | 2014-03-26 |
| CN103684594B CN103684594B (en) | 2016-11-30 |
Family
ID=
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187732A (en) * | 2014-04-24 | 2015-12-23 | 北京国承万通信息科技有限公司 | Method and device for transmitting/acquiring information with visible light signals of different colors from light sources |
| EP3190725A4 (en) * | 2014-09-05 | 2018-06-13 | Kuang-Chi Intelligent Photonic Technology Ltd. | Method for optical driving chip to control light-emitting device, and optical driving chip therefor |
| CN108734945A (en) * | 2017-04-20 | 2018-11-02 | 台达电子工业股份有限公司 | The sensor instruction transmission realized by light source and configuration method |
| CN110138452A (en) * | 2019-04-18 | 2019-08-16 | 中国人民解放军战略支援部队信息工程大学 | A kind of data transmission method and system based on internet of things equipment indicator light |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006080A (en) * | 2010-11-09 | 2011-04-06 | 中国人民解放军国防科学技术大学 | Data coding method for passive radio frequency identification system |
| US20110222849A1 (en) * | 2010-03-12 | 2011-09-15 | Kookmin University Industry-Academic Cooperation Foundation | Optical transmission apparatus for visible light communication |
| CN102640434A (en) * | 2009-12-03 | 2012-08-15 | 三星电子株式会社 | Apparatus and method for controlling brightness of light sources used for data transmission |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102640434A (en) * | 2009-12-03 | 2012-08-15 | 三星电子株式会社 | Apparatus and method for controlling brightness of light sources used for data transmission |
| US20110222849A1 (en) * | 2010-03-12 | 2011-09-15 | Kookmin University Industry-Academic Cooperation Foundation | Optical transmission apparatus for visible light communication |
| CN102006080A (en) * | 2010-11-09 | 2011-04-06 | 中国人民解放军国防科学技术大学 | Data coding method for passive radio frequency identification system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187732A (en) * | 2014-04-24 | 2015-12-23 | 北京国承万通信息科技有限公司 | Method and device for transmitting/acquiring information with visible light signals of different colors from light sources |
| EP3190725A4 (en) * | 2014-09-05 | 2018-06-13 | Kuang-Chi Intelligent Photonic Technology Ltd. | Method for optical driving chip to control light-emitting device, and optical driving chip therefor |
| US10128947B2 (en) | 2014-09-05 | 2018-11-13 | Kuang-Chi Intelligent Photonic Technology Ltd. | Method for optical driving chip to control light-emitting device, and optical drive chip therefor |
| CN108734945A (en) * | 2017-04-20 | 2018-11-02 | 台达电子工业股份有限公司 | The sensor instruction transmission realized by light source and configuration method |
| CN110138452A (en) * | 2019-04-18 | 2019-08-16 | 中国人民解放军战略支援部队信息工程大学 | A kind of data transmission method and system based on internet of things equipment indicator light |
| CN110138452B (en) * | 2019-04-18 | 2021-01-29 | 中国人民解放军战略支援部队信息工程大学 | Data transmission method and system based on Internet of things equipment indicator lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102684869B (en) | Based on decryption method and the system of visible light communication | |
| KR102082931B1 (en) | Multi-stage amplitude modulation-based methods, apparatuses and systems for coding and decoding visible light signal | |
| CN105450299A (en) | Method, device and system for coding and decoding signal | |
| US9698907B2 (en) | Handshake synchronization by adjusting status of status machine of receiving end to a state indicated by status reset signal | |
| CN102790645B (en) | Multi-path visible light communication based scrambling and descrambling system and method | |
| CN102724011A (en) | Handshake synchronous method and handshake synchronous system of visible light signal | |
| CN102710418A (en) | Method and system for encrypting and decrypting visible light signals | |
| CN102780695B (en) | Handshake synchronization method and system based on visible-light communication | |
| CN102684786A (en) | Encryption method and system based on visible light communication | |
| CN102710364A (en) | Encryption and decryption method and system based on visible light communication | |
| CN102694598B (en) | Coding method and transmission method of visible light signals | |
| CN111181652A (en) | PS-PAM4 system based on bit weighted distribution matching | |
| CN106899347A (en) | Based on the system and method that 2D TCM PAM8 realize high speed transmission of signals | |
| CN102820922B (en) | Asynchronous encryption visible light communication method and system | |
| CN102842151A (en) | Automatic fare collection system for highway based on optical communication technique | |
| CN103793979B (en) | Method for upgrading photon receiving end | |
| CN103679857A (en) | Mobile phone photon client coding method | |
| CN102810220A (en) | Access control system based visible light signal transmission method and access control system | |
| CN103684594A (en) | Encoding method based on visible light communication | |
| CN105471513A (en) | Wireless signal self-adaptive receiving method, device and system | |
| CN103812556B (en) | Lighting parameter optimizing method for photon client | |
| CN104935381B (en) | A kind of multichannel Ethernet power port turns optical port one-way transmission apparatus | |
| CN102801520B (en) | Method and system for encryption communication | |
| CN103684594B (en) | Coded method based on visible light communication | |
| CN102769524A (en) | Method and system capable of synchronously restoring handshake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150911 Address after: 518000 Guangdong city of Shenzhen province Futian District Shennan Road and CaiTian Road intersection East Xintiandi Plaza C block 2007-27 Applicant after: Shenzhen Guang Qi intelligent photonic Technology Co., Ltd. Address before: 518034 A international business center, No. 1061, Xiang Mei Road, Guangdong, Shenzhen, Futian District, China 18B Applicant before: Shenzhen Kuang-Chi Innovation Technology Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |