Wireless Data Technologies
Virtual Week Work
This week you are not
expected to attend, however you are given work to do on your own.
Firstly, make sure that you understand the mathematics that was
introduced 2 weeks ago and that you have finished the worksheet.
Please look at the topology
of JANET and work out where the KentMAN fits into this network.
Please view the raft powerpoint
then answer the following questions. Note that you may need to carry
out some research to answer the questions:
1. What are the advantages of deploying a wireless network?
2. Two different wireless technologies are offered. What are they and
what are their features?
3. In setting up the MAN in Kent, what were the factors involved when
planning the routes?
4. What do the acronyms LOS and NLOS stand for?
5. What are the microwave frequencies and their relative bandwidths?
6. For microwave transmissions, what are the bandwidths (frequency
ranges) for LOS and NLOS?
7. Now refer to the network topology map on slide 14 of the presentation. You will see that the
network is formed into a ring of 155 Mbps links. Using either Google Maps or Google Earth,
attempt to discover the exact locations of some of the nodes in a
similar fashion to those I created on the map I showed you last time
we met. You could create an account on Google Maps and save the sites
yourself or save the locations on your copy of Google Earth. Keep any
useful urls for later use in the course.
8. Now look at the concept of the signal-to-noise ratio (SNR). Use
Google to carry out research or look in a library or journals.
9. What is the usual unit for measuring SNRs?
10. What are some of the causes of noise in a digital communication
system?
11. Suggest a means to reduce the noise in a communication system.
12. What is "white noise"?
Make a note of the responses to the questions above and be
prepared to present them to your colleagues when we next meet.
MMClements 2007