Technology modified
- 1. TECHNOLOGY EDUCATION =TECHNOLOGY Technology is the collection of techniques, skills, methods and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Simply, Technology means to explore(or)invent(or)innovate(or)discover things
- 2. WIRELESS TECHNOLOGY TOPICS TO BE DISCUSSED: • Types of networks • Types of WIRELESS technologies • LI-FI technology • Working process of LI-FI • Comparison with WI-FI • Advantages &Disadvantages of LI-FI
- 3. TYPES OF NETWORKS NETWORK --- it is a group of two or more computer systems linked together. PAN LAN MAN WAN
- 4. TYPES OF WIRELESS TECHNOLOGIES BLUETOOTH Technology WIMAX Technology ZIGBEE Technology WI-FI Technology LI-FI Technology
- 5. Light – Fidelity LI-FI is transmission of data through illumination, sending data through a LED light bulb that varies in intensity faster than human eye can follow German physicist , Dr. Harald Haas was first coined for li-fi In 2011 at university of EDINBURGH,UK
- 6. Working of LI-FI WORKING PRINCPAL OF LI-FI is based on VLC, I.e; which uses visible light for data transmission operational procedure is very simple, if the led is on, you transmit a digital 1, if its off you transmit a 0. The LED’s can be switched on and off very quickly, which gives nice opportunities for transmitting data. Hence all that us required is 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 Thus every light source will works as a hub for data HOW IT WORKS ???
- 7. WHY WE USE ONLY VLC ???
- 9. FEATURE WI-FI LI-FI FULL FORM Wireless Fidelity Light Fidelity OPERATION WiFi transmits data using radio waves with the help of WiFi router. LiFi transmits data using light with the help of LED bulbs INTERFERNCE Will have interference issues from nearby access points(routers) Do not have any interference issues similar to radio frequency waves TECHNOLOGY WLAN 802.11a/b/g/n/ac/ad standard compliant devices Present IrDA compliant devices APPLICATIONS Used for internet browsing with the help of wifi kiosks or wifi hotspots Used in airlines, undersea explorations, operation theaters in the hospitals, office and home premises for data transfer and internet browsing ADVANTAGES Interference is more, can not pass through sea water, works in less dense region Interference is less, can pass through salty sea water, works in dense region PRIVACY In WiFi, RF signal can not be blocked by the walls and In LiFi, light is blocked by the walls and hence will provide more
- 10. APPLICATIONS OF LI-FI Whenever we travel through airways we face the problem in communication media,because the whole airways communication are performed on the basis of radio waves. To overcomes this drawback on radio ways , li-fi is introduced. Li-Fi can even wok underwater were Wi-Fi fails completely, thereby throwing open endless opportunities for military/navigation operations.
- 11. ADVANTAGES & DISADVANTAGES • ADVANTAGES: • Green information technology • Lighting points Used as Hotspots • Can be used in hospitals and even underwater • High Security • Easy To Use • Fast Data Transfer • Harmlessness • Low-cost DISADVANTAGES: • For instance light cannot pass through walls. • You cannot enjoy internet without light source (sun or bulb). • Li-Fi's biggest drawback apart from walls is inability to provide uninterrupted internet outdoor (Even during day) Sun light would interfere with its signal. • Its very difficult to create a whole new Infrastructure for Li-Fi.
- 12. Aditya institute of technology & management Any queries???