Wi-Fi vs Li-Fi

Presented By:

Abhishek Shukla(SE ETRX)

Datta Meghe College Of Engineering

• Uses Radio Waves.

• Maximum speed: 1Gb/s.

Wi-Fi

• Uses Light waves.

• Maximum speed 10Gb/s.

Li-Fi

What is Wi-Fi? Wi-Fi stands for Wireless Fidelity.

Fidelity: A faithful output.

Generally used to connect devices in wireless mode.

It is a term that refers to IEEE 802.11 communications.

How Wi-Fi works?

ISP

Computers

Wi-Fi Router

Mobiles Any Wireless Device

How Wi-Fi Works?

Different Wi-Fi standards

IEEE 802.11 a Introduced in 1999.

Frequency: 5 GHz.

Range : 10m.

Speed: 54 Mbits/s.

IEEE 802.11 b

Introduced in 2001.

Frequency: 2.4 GHz.

Range : 50 m.

Speed: 11 Mbits/s.

IEEE 802.11 g Introduced in 2003.

Frequency: 2.4 GHz.

Range : 75 m.

Speed: 54 Mbits/s

IEEE 802.11 n Introduced in 2007.

Frequency: 2.4 GHz & 5 GHz.

Range : 100-150 m.

Speed: 300 Mbits/s.

IEEE 802.11 ac

Introduced in 2013.

Frequency: 5 Ghz.

Range: 150 m.

Speed: 1 Gbits/s.

Wi-Fi network topologies AP based topology.

Peer-to-peer topology.

Point to multipoint bridge topology.

AP based technology

Peer-to-peer Topology

Point to multipoint Topology

Advantages• Free of wires.

• Easy Implementation.

• Mobility.

• Cost is less.

Disadvantages• Limited Capacity.

• Limited Availability.

• Limited Speed.

• Insecure.

• Harmful.

Electromagnetic Spectrum

What is Li-Fi?• Li-Fi stands for Light Fidelity.

• Uses light instead of radio waves.

• Uses Visible part of electromagnetic spectrum.

• Also known as Light based Wi-Fi.

Harald Hass

How Li-Fi works?

How Li-Fi overcomes Wi-Fi

CAPACITY EFFECIENCY

AVAILABILTY SECURITY

Applications• Underwater.

• Hospitals & Medicare's.

• Aircrafts.

• Petrochemical Plants & many more….