IJRE - International Journal of Research in Electronics ISSN: 2349-252X

SMART LI-FI BASED CAR PARKING SYSTEM M.Chinnadurai1 | T.Savadamuthu2

1(RVS College of Engineering,Student,Dindigul-624005.TamilNadu,India.) 2(RVS College of Engineering,Student,Dindigul-624005.TamilNadu,India.)

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Abstract—Car parking information system exploiting visible light communication (VLC) technology. To help drivers getting the real-time status information as Well as direction guide. By providing accurate information on available product spaces. In modern life, the shopping complexes always attract people for its good products and service. smart parking information system exploiting visible light communication (VLC) technology to help drivers getting the real-time parking information as well as direction guide. By providing accurate information on available parking spaces, drivers save time and fuel and increase efficiency of the parking process. The effectiveness of the proposed scheme is validated through experiments in an indoor environment. In modern life, the shopping complexes always attract people for its good products and service. What’s more, shopping complexes have begun providing services much more diverse than just pure selling and buying. Customers can use banking services, post offices, food courts, cinemas, children's play areas . Providing sufficient parking spaces for visitors is one of the most important issues in developing shopping complexes. Offering safe and conventional parking lots with a sufficient number of spaces is a few of the factors which can increase customer loyalty and attract customers to visit a shopping mall more frequently. However, until now, various parking information systems in our life are based on conventional radio communication system, which need specific industry standard.

Keywords—Visible Light Communication ((VLC),Li-Fi,Wi-Fi. ______________________________________________________________________________________________________________

1. INTRODUCTION A 5G technology as they say, LIFI is coined as a massive MIMO visible light communication network which uses LEDs. A future technology that guarantees to replace the 2G, 2.5G, 3G and the latest 4G systems of communication. The current technologies which employ WIFI define it as any "wireless local area network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards”. LIFI is thought of as an alternative or an exchange to the currently used WIFI. With an exhausted and congested network, it was necessary to articulate our minds into a technology which not only is ubiquitous but also a resourceful quantity. Professor Harald Haas during his TED global talk rightfully coined LIFI as the future upcoming technology. Quiet significant amounts of advantages make LIFI a potent technology. Visible light is defined as having a wavelength in range of 400 nanometers to 700 nanometers, which pros to have 10,000 times broader spectrum than the radio wave spectrum employed in WIFI. This technology further has the quintessential advantage of not needing any base stations and primarily requiring unlicensed services. Very high data rates can be achieved due to low interference, high device bandwidths and high intensity optical output. Moreover, it is non-hazardous and a safe technology which can even be employed in riverbeds and is cost effective. These pros of LIFI outshine it from other technologies.

2. TECHNOLOGY DETAILS It is an OWC system that uses light from LEDs as a medium to deliver networked, mobile, high-speed communication in a similar manner as Wi-Fi. Li-Fi could lead to the Internet of Things(IoT), which is everything

electronic being connected to the internet, with the LED lights on the electronics being used as Li-Fi internet access points. Visible light communications (VLC) works by switching bulbs on and off within nanoseconds, which is too quickly to be noticed by the human eye. Although Li-Fi bulbs would have to be kept on to transmit data, the bulbs could be dimmed to the point that they were not visible to humans and yet still functional. The light waves cannot penetrate walls which makes a much shorter range, though more secure from hacking, relative to Wi-Fi. Direct line of sight isn't necessary for Li-Fi to transmit a signal; light reflected off the walls can achieve 70 Mbps. Li-Fi has the advantage of being useful in electromagnetic sensitive areas such as in aircraft cabins, hospitals and nuclear power plants without causing electromagnetic interference. Both Wi-Fi and Li-Fi transmit data over the electromagnetic spectrum, but whereas Wi-Fi utilizes radio waves, Li-Fi uses visible light. While the US Federal Communications Commission has warned of a potential spectrum crisis because Wi-Fi is close to full capacity, Li-Fi has almost no limitations on capacity. The visible light spectrum is 10,000 times larger than the entire radio frequency spectrum. Researchers have reached data rates of over 10 Gbps, which is more than 250 times faster than superfast broadband. Li-Fi is expected to be ten times cheaper than Wi-Fi. A.LI-FI CONSORTIUM The Li-Fi Consortium is an international platform focusing on optical wireless technologies. The goal of Li-Fi Consortium is to foster the development and distribution of (Li-Fi) optical wireless technologies such as communication, navigation, natural user interfaces and others. As of 2012 the Li-Fi Consortium outlined a roadmap for different types of optical communication such as gigabit-class communication as well as a full featured

IJRE - International Journal of Research in Electronics Volume: 03 Issue: 02 2016 www.researchscript.com 35

IJRE - International Journal of Research in Electronics ISSN: 2349-252X

Li-Fi cloud which includes many more besides wireless infrared and visible light communication.

3. LI FI CONSTRUCTION The Li-Fi product consists of 4 primary sub-assemblies:

1. Bulb 2. RF Power Amplifier Circuit (PA) 3. Printed Circuit Board (PCB) 4. Enclosure

The high concentration of energy in the electric field vaporizes the contents of the bulb to a plasma state at the bulb’s center; this controlled plasma generates an intense source of light. The PCB controls the electrical inputs and outputs of the lamp and houses the microcontroller used to manage different lamp functions. An RF (radio-frequency) signal is generated by the solid-state PA and is guided into an electric field about the bulb. All of these subassemblies are contained in an aluminum enclosure. A.WORKS ON LI FI On one end all the data on the internet will be streamed to a lamp driver. When the LED is turned on the microchip converts this digital data in the form of light. On the other end this light is detected by photo sensitive devices. Next this light is amplified and processed and then fed to the device.

Fig.1.Procedure MAO of LiFi

4. PROPOSED SYSTEM Super market product information system exploiting visible light communication (VLC) technology. To help drivers getting the real-time product information as Well as direction guide. By providing accurate information on available product spaces. The proposed system not only gives the illumination function of LED but also the function of communicating in the manner of application based on the VLC. The effectiveness of the proposed scheme is validated through experiments in an indoor environment In modern life, the shopping complexes always attract people for its good products and service.

Fig.2.Blockdiagram All type of input is converted into binary form and encoded for transmission. That data as a pulse generated by micro controller. The transmission device as LED. The receiving device is photo detector that receives the data. Data is decoded and converted into original form. Visible light communication is Very simple, if the LED is on, you transmit a digital 1, if it’s off you transmit a 0. The LEDs can be switched on and off very quickly, which gives nice opportunities for transmitting data.” So what you require at all are some LEDs and a controller that code data into those LEDs. We have to just vary the rate at which the LED’s flicker depending upon the data we want to encode. Further enhancements can be made in this method, like using an array of LEDs for parallel data transmission, or using mixtures of red, green and blue LEDs to alter the light’s frequency with each frequency encoding a different data channel. Such advancements promise a theoretical speed of 10 Gbps – meaning you can download a full high-definition film in just 30 seconds. This invisible on-off activity enables a kind of data transmission using binary codes: switching on an LED is a logical '1', switching it off is a logical '0'. Information can therefore be encoded in the light by varying the rate at which the LEDs flicker on and off to give different strings of 1s and 0s. This method of using rapid pulses of light to transmit information wirelessly is technically referred to as Visible Light Communication (VLC), though it’s potential to compete with conventional Wi-Fi has inspired the popular characterization Li-Fi.

5. SYSTEM REQUIREMENTS A. Hardware Requirement

• ATMEL 89C51 • LED • Photo detector • LCD

B.Structures and Operation All four ports in the AT89C51 and AT89C52 are bidirectional. Each consists of a latch (Special Function Registers P0 through P3), an output driver, and an input buffer. The output drivers of Ports 0 and 2, and the input buffers of Port 0, are used in accesses to external memory. In this application, Port 0 outputs the low byte of the

IJRE - International Journal of Research in Electronics Volume: 03 Issue: 02 2016 www.researchscript.com 36

IJRE - International Journal of Research in Electronics ISSN: 2349-252X

external memory address, time-multiplexed with the byte being written or read. Port 2 outputs the high byte of the external memory address when the address is 16 bits wide. Otherwise the Port 2 pins continue to emit the P2 SFR content. All the Port 3 pins, and two Port 1 pins (in the AT89C52) are multifunctional. The alternate functions can only be activated if the corresponding bit latch in the port SFR contains a 1. Otherwise the port pin is stuck at 0. It has less complex feature than other microprocessor.

6. ARCHITECTURE OF AT89C51

Fig.Architecture of AT89C51 A.SOFTWARE REQUIREMENT

• Keil C • PROTEUS ISIS 7.7 SP2

7. KEIL C COMPILER The Keil C51 C Compiler for the 8051 microcontroller is the most popular 8051 C compiler in the world. It provides more features than any other 8051 C compiler available today. The C51 Compiler allows you to write 8051 microcontroller applications in C that, once compiled, have the efficiency and speed of assembly language. Language extensions in the C51 Compiler give you full access to all resources of the 8051.The C51 Compiler translates C source files into reloadable object modules which contain full symbolic information for debugging with the µVision Debugger or an in-circuit emulator. In addition to the object file, the compiler generates a listing file which may optionally include symbol table and cross reference information.

8. CONCLUSITION Li-Fi is the upcoming and on growing technology acting as competent for various other developing and already invented technologies. Since light is d major source for transmission in this technology it is very advantageous and implementable in various fields that can’t be done with the Wi-Fi and other technologies. Hence the future applications of the Li-Fi can be predicted and extended to different plat- forms like education fields, medical field, industrial areas and many other fields. The possibilities are numerous and can be explored further. If this technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data and we will proceed towards the cleaner, Greener, Safer and Brighter future.

REFERENCES [1] ZhenhuaYu, Arthur J.Redfern and G.TongZhou,2014”Using Delta-

Sigma Modulators in visible light OFDM systems” IEEE conference on wireless optical communication.

[2] Naveen Rathee,Abhinavmalik,Sheryaa Nagpal,2014”Transmission of Numeric and Voice using Light Fidelity (Li-Fi) Technology.

[3] Alexander McBride, Burim Derveni,2014,”Transitioning to hybrid Radio/Optical Networks: Development of a Flexible Visible Light Communication Testbed 5GU.

[4] Girogio corbellini,Stefan Schmid,Stefan Mangold Thomas R.Gross.Armen Mkrtchyan,2012”LED-LED Visible Light Communication for mobile Applications.

[5] A.Jovicic ,J.Li,and T.Richardson.2013.”Visible LightCommunication:opportunities,challenges,Magazine’.vol.51.no.12,pp 26-32.

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