Page 144 - DCAP311_DCAP607_WIRELESS_NETWORKS

Wireless Networks

Notes Health care professionals at the villages can consult specialists at the Medical College
and Hospital thereby providing specialized treatment, especially during emergencies, at
people’s doorsteps.
Information about government programs for the welfare of the people can be made
available to the people and they can interact with the concerned government official right
from their village. This will particularly benefit rural women. The villagers can interact
with the sugar factory as well as with the Pravara Co-operative Bank saving time in the
process.
Going forward, the Pravara group is planning to connect at least seven more villages using
RF and 15 through dial-up by the end of 2002. The ultimate goal is to connect 100 villages
through PRAGATI.

Questions:
1. Study and analyse the case.
2. Write down the case facts.
3. What do you infer from it?

Source: http://www.convergentindia.com/wl-case-wman.asp

8.3 Summary

A metropolitan area network (MAN) is a computer network in which two or more computers or
communicating devices or networks which are geographically separated but in same metropolitan
city and are connected to each other are said to be connected on MAN.
Wireless Metropolitan Area Network (WMAN) enables you to access the Internet and multimedia
streaming services via a wireless region area network (WRAN).
These networks provide a very fast data speed compared with the data rates of mobile
telecommunication technology as well as other wireless network, and their range is also extensive.

WiMAX works with radio wave for transmission and microwaves for reception in frequencies
between 2,3 and 3,5 GHz.
The first WiMAX standard IEEE 802.16 , was created to administrate the interoperability of all
devices working between 10 and 66 GHz.
It will allow, as WiFI does, receive and transmit encrypted information among devices that have
the technology.

8.4 Keywords

Metropolitan area network (MAN): is a computer network in which two or more computers or
communicating devices or networks which are geographically separated but in same metropolitan
city and are connected to each other are said to be connected on MAN.
Wireless bridge: is a hardware component used to connect two or more network segments (lans
or parts of a LAN) which are physically and logically (by protocol) separated.
Highly directional antenna: offers a number of advantages over the other two types, which are
omni-directional and semi-directional antennas.
Polarization: (or Polarisation for our British friends) is one of the fundamental characteristics of
any antenna.

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