LiFi Technology an effective way of Communication
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LI FI
LiFi Technology an effective way of Communication
- 1. GOVERNMENT POLYTECHNIC COLLEGE CHROMEPET CHENNAI-44 Li-Fi: The Future of Wireless Communication Presented by: JEEVAA T VARUN S
- 2. 2 Li-Fi: The Future of Wireless Communication • Li-Fi (Light Fidelity) uses visible light communication (VLC) to transmit data wirelessly, offering speeds up to 100 times faster than Wi-Fi. • Invented by Prof. Harald Haas. • Li-Fi addresses RF spectrum congestion, growing IoT demands, and 5G limitations by using the abundant visible light spectrum.
- 3. 3 Working Principle: How Li-Fi Transmits Data LED Light Source LEDs serve as transmitters, capable of switching on and off millions of times per second Modulation Data encoded in light intensity variations through ON/OFF switching (binary data) Receiver Photodiode, image sensor, or solar panel detects light variations and converts them to electrical signals
- 4. 4 Technical Specifications 224 Gbps Theoretical Speed Maximum potential data transfer rate 430-770 THz Frequency Range Visible light spectrum 10m Typical Range Coverage area within light reach Li-Fi offers significantly lower latency and higher bandwidth compared to Wi-Fi, while consuming less power as LEDs are more energy-efficient than RF transmitters.
- 5. 5 Advantages of Li-Fi Superior Speed Up to 100 times faster than conventional Wi-Fi, enabling rapid data transfer Enhanced Security Light cannot penetrate walls, preventing external hacking and signal interception No RF Interference Ideal for sensitive environments like hospitals, aircraft, and underwater applications Abundant Spectrum Visible light spectrum is 10,000 times larger than the RF spectrum, offering more bandwidth
- 6. 6 Limitations and Challenges Line of Sight Requirement • Transmitter and receiver must have direct visual connection Limited Range • Only works where light falls, typically within 10 meters Darkness Limitation • Cannot function in darkness or when light is blocked Standardization & Cost • Lack of universal standards and high infrastructure costs
- 7. 7 The Future of Light: Li-Fi Technology A revolutionary wireless communication technology using light to transmit data, poised to transform how we connect in the digital age.
- 8. 8 Future Scope & Innovations 5G/6G Integration Seamless integration with next-generation mobile networks, creating hybrid connectivity solutions. Smart Cities Streetlights doubling as data transmission points, enabling citywide IoT networks with minimal infrastructure changes. Autonomous Vehicles V2V and V2X communication through headlights and traffic signals, enhancing safety and reducing latency. Market forecasts predict exponential growth as these innovations mature and gain widespread adoption.
- 9. 9 Security & Privacy Advantages Physical Containment Light cannot penetrate walls, creating naturally contained networks that prevent eavesdropping from outside the room. Directional Precision Signals can be precisely directed to intended receivers, reducing interception risks. Advanced Encryption Light-specific encryption methods add additional security layers beyond standard protocols. While offering superior security, potential vulnerabilities exist in mixed lighting environments and through reflection-based attacks.
- 10. 10 Li-Fi vs. Wi-Fi: Comparative Analysis Parameter Li-Fi Wi-Fi Speed Up to 224 Gbps Up to 9.6 Gbps (Wi-Fi 6) Security High (physically contained) Medium (can penetrate walls) Range 10 metres (limited) 30+ metres Power Consumption Very low Medium to high Spectrum Unregulated, vast Regulated, congested Li-Fi excels in speed and security but has range limitations that make it complementary rather than a replacement for RF-based systems.
- 11. 11 Conclusion Li-Fi is not just an alternative to Wi-Fi, but a complementary technology paving the way for faster, safer, and greener communication networks
- 12. 12 References 1. Sarkar, A., Agarwal, S., & Nath, A. (2015). Li-Fi technology: data transmission through visible light. International Journal of Advance Research in Computer Science and Management Studies, 3(6). 2. Siddique, I., Awan, M. Z., Khan, M. Y., & Mazhar, A. (2019). Li-Fi the next generation of wireless communication through visible light communication (VLC) technology. International Journal of Scientific Research in Computer Science, Engineering and Information Technology, 5(1), 30-37. 3. Karthika, R., & Balakrishnan, S. (2015). Wireless communication using Li-Fi technology. SSRG International Journal of Electronics and Communication Engineering (SSRG-IJECE), 2(3), 32-40. 4. Ghosh, D., Chatterjee, S., Kothari, V., Kumar, A., Nair, M., & Lokesh, E. (2019, March). An application of Li-Fi based wireless communication system using visible light communication. In 2019 International Conference on Opto-Electronics and Applied Optics (Optronix) (pp. 1-3). IEEE. 5. Raza, A., Mehdi, H., Hussain, Z., Arif, M., & Hussain, S. (2021, October). Visible light communication (Li-Fi technology). In 2021 International Conference on Computing, Electronic and Electrical Engineering (ICE Cube) (pp. 1-6). IEEE.