29-12-2009, 06:52 PM
DakNetis an ad hoc network that uses wireless technology to provide asynchronous digital connectivity.DakNet, whose name derives from
the Hindi word for post or postal,(dak) combines
a physical means of transportation with wireless
data transfer to extend the Internet connectivity. DakNet has been successfully deployed in remote parts of both India and Cambodia at a cost much less than that of traditional landline solutions. Villagers now get affordable Internet services.
The wireless catalyst
Recent advances in wireless computer networkingâ€
particularly the IEEE 802 standardsâ€have led
to huge commercial success and low pricing for
broadband networks.These can be used to provide broadband access to even the
most remote areas at a low price. wireless cell
phone and wireless local loop (WLL) service costs
roughly a third of that of the landline .The WiFi standard is the most promising of the wireless technologies.
MOBILE AD HOC CONNECTIVITY
DakNet transmits data over short
point-to-point links between kiosks and portable
storage devices, called mobile access points (MAPs). Mounted on and powered by a bus, a
motorcycle, or even a bicycle with a small generator,
a MAP physically transports data among public
kiosks and private communications devices and between kiosks and a hub.WiFi radio
transceivers automatically transfer the data stored
in the mobile access points MAP at high bandwidth for each point-topoint
connection.
The Daknet operation consists of two steps:
-Powering the village kiosks:As the MAP-equipped vehicle comes in
range of a village WiFi-enabled kiosk, it automatically
senses the wireless connection and
then uploads and downloads MBs of data.
-Synchronisation with internet: When a MAP-equipped vehicle comes within
range of an Internet access point (the hub), it
automatically synchronizes the data from all
the rural kiosks, using the Internet.
For a lot of vehicles carrying a
MAP unit,These steps are repeated. a single vehicle passing by a village once per
day is sufficient to provide daily information services.a significant amount of data can move at once(typically 20MB either direction), which is better than low-bandwidth technologies such as a telephone modem.
For full seminar report pdf:
http://mobileactivefiles/file_uploads/DakNet_IEEE_Computer.pdf
