wifi and lifi technology
DESCRIPTION
Lifi and Wifi existing thrilling inventions.TRANSCRIPT
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