wi fi vs lifi

Wi-Fi vs Li-FiPresented By:

Shining stars

JAWAD ABRAIZ KHAN MUHAMMAD UMERQASIM ANWAR CHGULAM ABBASABDUL MAJID

SUPERIOR UNIVERSITY SIALKOT

• 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….

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