LI-FI stands for light
fidelity. LI-FI was invent by Professor Herald Hass of university of Edinburg.
Professor gave a demo of a LI-FI prototype at the TED Global conference in Edinburgh
on July 12 2011.he used a table lamp with an LED Bulb to conduct a video of a
blooming flower that were projected on a screen. According to Professor Hass,
the light he referred to as a D-Light, to produce data rates higher than 10
megabytes per second. After that during the conversation about that in that meeting,
he blocked the light of the bulb of lamp to show that bulb was the source of
video data professor told about the near future problems with the WIFI just
like Capacity, Efficiency, Availability and Security. because WIFI uses Radio
Waves and radio waves van penetrate through walls which cause security issue,
Efficiency is affected when there are too many users but the capacity of the
connection is low1.
In present days, everyone is using WIFI and in search of that hotspots.LI-FI
uses light to transmit its signals instead of radio waves. In place of WIFI
modems, LI-FI uses transceivers that are fitted with LED lamps that can lighten
up the rooms as well as convey and catch the information. It uses the visible
portion of the electromagnetic spectrum that are underutilized 2 3.
LI-FI is better than WIFI because there are limitations in WIFI and due to
these limitations, the reliability of signals bound to suffer. WIFI uses 2.4-5
GHz Radio frequencies to convey internet access and its bandwidth is limited to
50-100 mbps. There are major issue of security in using WIFI while in LI-FI
there is no security concerns and speed is also is the best feature of LI-FI
because the signals travels with the speed of light 4.
The use of LI-FI is
limited with the source of light because light is required to transmit the
internet signals and light cannot penetrate through walls. I will work on this
problem of LI-FI to enhance its transmission and will try to use it without
light source or with solar light LED. S that in day it consume sunlight and
LEDs be charged by sunlight to use it in night and take that LED wherever we
want to take it and enjoy the use of internet with high speed and without any
hurdle by that portable solar light LED.