Wifi and Lifi Technology

LIFI AND WIFI TECHNOLOGY

Presented by

BS IT 4th

University of Gujrat

Ummar Ahmed

LiFi Technology:-

History

Professor Harald Haas (Uni. of Edinburgh)

Day of Invention(October , 2011)

OEM

Oxford University

LiFi Technology:-Introduction

“Light Fedility”

Bidirectional

VLC (Not Radio)

Optical Wireless Communication

Technical Detail

LiFi Technology:-

5G VLC

Switching (Nanoseconds)

Secure from Hacking

Walls reflection 70 Mbits/s

Work in sensitive areas

Light Spec = 10,000 * Radio

No Pot. Spec. Limit

Issues of Radio Spec.

Capacity Availability

EfficiencySecurity

Issues of Radio Spec.

Radio wave| Ifrared| Visible|

Ultra violet| X-rays|

Gamma rays

Insuffient spectrum for increasing data Which is not

used so far.

Dangerous for human body

Used for hospitals

Low power application

It is not used generally

Standars

and Protocols

802.11 Protocols

IEEE Std fail in Optical wireless communication

Advantages of Lifi

More than 10Gbps download in 30 sec(theoreticaly)-

Cost Efficient(due to use of LEDs)-

Fast and easy transmission-

Bandwidth(10,000 times greater than radio waves)-

More availability-

Highly secure-

Disdvantages of Lifi Short range-

Low reliability-

High Installation cost-

Connectivity while moving-

Shadowing-

Presence of Light necessary-

Efficiency-Less with bulbs, More with LEDs

History

•1990 – 802.11•1999 – 802.11 a and b•2003 – 802.11g

Standers IEEE

Connect the systems to Internet and and wired network.

Wireless Environment

Access to multiconnections Laptop Mobility

Use Radio Wave Networking got tangle

Introduction

Technical Details

Basic Concept similar to Walkie Talkies

Base Station: Access point in Computer.

A Bridge for the traffic.

Wifi

Network Architectur

AdHoc Mode

Infrastructure Mode

Advantages of Wifi

Advantages if Wif

i Wireless-

Low Cost-

Mobility-

Expandability-

Deployment-

Productivity-

Convenience-

Disadvantages of Wifi

Interference-

Degradation in performance-

High power consumption-

Limited range-

Data security risk-

Speed-

Any Question……..????

Thank You for your

Attention