computer science crazy|
Joined: Dec 2008
21-09-2008, 10:44 AM
Now a day it is very easy to establish communication from one part of the world to other. Despite this even now in remote areas villagers travel to talk to family members or to get forms which citizens in-developed countries an call up on a computer in a matter of seconds. The government tries to give telephone connection in very village in the mistaken belief that ordinary telephone is the cheapest way to provide connectivity. But the recent advancements in wireless technology make running a copper wire to an analog telephone much more expensive than the broadband wireless Internet connectivity. Daknet, an ad hoc network uses wireless technology to provide digital connectivity. Daknet takes advantages of the existing transportation and communication infrastructure to provide digital connectivity. Daknet whose name derives from the Hindi word "Dak" for postal combines a physical means of transportation with wireless data transfer to extend the internet connectivity that a uplink, a cyber caf? or post office provides.
Real time communications need large capital investment and hence high level of user adoption to receiver costs. The average villager cannot even afford a personnel communications device such as a telephone or computer. To recover cost, users must share the communication infrastructure. Real time aspect of telephony can also be a disadvantage. Studies show that the current market for successful rural Information and Communication Technology (ICT) services does not appear to rely on real-time connectivity, but rather on affordability and basic interactivity. The poor not only need digital services, but they are willing and able to pay for them to offset the much higher costs of poor transportation, unfair pricing, and corruption. It is useful to consider non real-time infrastructures and applications such as voice mail, e-mail, and electronic bulletin boards. Technologies like store- and forward or asynchronous modes of communication can be significantly lower in cost and do not necessarily sacrifice the functionality required to deliver valuable user services. In addition to non real-time applications such as e-mail and voice messaging , providers can use asynchronous modes of communication to create local information repositories that community members can add to and query.
Advances in the IEEE 802 standards have led to huge commercial success and low pricing for broadband networks. These techniques can provide broadband access to even the most remote areas at low price. Important considerations in a WLAN are
Security: In a WLAN, access is not limited to the wired PCs but it is also open to all the wireless network devices, making it for a hacker to easily breach the security of that network.
Reach: WLAN should have optimum coverage and performance for mobile users to seamlessly roam in the wireless network
Interference: Minimize the interference and obstruction by designing the wireless network with proper placement of wireless devices.
Interoperability: Choose a wireless technology standard that would make the WLAN a truly interoperable network with devices from different vendors integrated into the same.
Reliability: WLAN should provide reliable network connection in the enterprise network.
Manageability: A manageable WLAN allows network administrators to manage, make changes and troubleshoot problems with fewer hassles. Wireless data networks based on the IEEE 802.11 or wifi standard are perhaps the most promising of the wireless technologies. Features of wifi include ease of setup, use and maintenance, relatively high bandwidth; and relatively low cost for both users and providers.
Daknet combines physical means of transportation with wireless data transfer to extend the internet connectivity. In this innovative vehicle mounted access points using 802.11b based technology to provide broadband, asynchronous, store and forward connectivity in rural areas.
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