2 CONTENTS Introduction Why Daknet Ad-hoc network Daknet network ArchitectureHow Daknet worksDaknet in actionFeatures of DaknetConclusion
3 Challenges to Rural Connectivity Lack of sensitization on the use and benefits of ICT in rural areas.Most rural areas don’t have the infrastructure to support cheap and good connectivity.Poor internet access.Availability of power is also a challenge
4 Introduction Daknet, whose name derives from the Hindi word “Dak” is an ad hoc network , using wireless technology to provide digital connectivity.It combines a physical means of transportation with wireless data transfer to extend the internet connectivity provided by a central uplink or hub.
5 Why Daknet?Provide non real-time infrastructures and applications such as voice mail, , and electronic bulletin boards.Provide store- and forward or asynchronous modes of communication that is significantly lower in cost and do not necessarily sacrifice the functionality required to deliver services.Simpler to add in a device to the system.Low maintenance cost.
6 Ad-Hoc NetworkAn ad-hoc wireless network is a collection of wireless mobile hosts forming a temporary network without the aid of any established infrastructure or centralized control.
7 Design Principles Lower costs by sharing Store and forward self-describing dataSeparate locationing and addressingUse all links, opportunistically, if necessarySeparate data and control planeProxies for legacy supportReplication for reliability
8 Daknet Network Architecture The main parts of a daknet architecture are:Mobile access pointHubKiosk
9 Mobile Access PointDaknet travels data over short point to point links between kiosks and portable storage devices called mobile access points.Mobile Access Point is mounted on and powered by a bus or motorcycle, or even a bicycle with a small generator. MAPs are installed on vehicles that normally pass by each village to provide store-and-forward connectivity.
10 MAP Equipments MAP equipment used on the bus includes: a custom embedded PC running Linux with b wireless card and 512 Mbytes of compact flash memory.a 100-mW amplifier, cabling, mounting equipment, and an omni directional antenna.an uninterruptible power supply powered by the bus battery.
11 HubIt is a common connection point for devices in a network. It is used to connect segments of a LAN. It contains multiple ports. Packet at one port copied to all other ports-all segments see all packets. When the vehicle passes near an internet access point –the hub- it synchronizes all the data from different kiosks using the internet.
12 KioskIt is a booth providing a computer related service such as ATM. In each village there is kiosk. It enable user to enter and display information on the same device. Either directional or omni directional antennas are located at each of the kiosks or hubs.
13 WiFi CardsIn Daknet a wireless card i.e wifi card is mounted on a vehicle that travels around to remote villages and exchanges updated information with each kiosk it encounters through WiFi.
14 Advantages of using WiFi cards Increase mobilityCost for setting up a network is much less than running wires.WiFi has a global set of standards.support encryption in order to protect the data that is being transmitted.
16 Contd…Thae MAP devices are mounted on specific transports that regularly pass through a series of villages.As the vehicle carrying the MAP comes within range of each village they automatically sense a wireless connection with a kiosk and deliver and collect data at relatively high bandwidth.Whenever a MAP comes within range of another kiosk or a hub, data is automatically uploaded to and downloaded from the internet.These steps are repeated for all the vehicles carrying MAP, thus providing a low cost wireless network and seamless communication infrastructure .
17 Daknet Package DakNet offers an affordable and complete connectivity package, including:Wireless hardware (wireless transceiver and antennas)Networking softwareServer and cache softwareCustom applications, including , audio/video messaging, and asynchronous Internet searching and browsingAPI enabling organizations to easily integrate DakNet with their existing applications
18 Features of DakNetSince it avoids using phone lines or expensive equipment, Daknet provides one of the lowest-cost accessibility solutions in the world.The same hardware, software and user interface can be used to enjoy real-time information access.It has the ability to provide a seamless method of upgrading to always -on broadband connectivity.
19 Daknet In ActionDaknet is currently in action in many places. They are,Bhoomi initiative in KarnatakaSARI (Sustainable Access for Rural India) project of TamilnaduRatnakiri project in Cambodia