WN - 1.02

Question 1

Name the two types of wireless networks

Answer 1

Nomadic and mobile

Question 2

Describe the mobile networks

Answer 2

Designed for communication while on the move.

1. Seamless roaming
2. Wireless telephony
3. Mobile data services -> email, web browsing

Question 3

Explain what a nomadic network is

Answer 3

A nomadic network is designed for communication in semi-mobile or temporarily stationary scenarios.

1. WLAN
2. Hotspots
3. Wireless ISPs

Question 4

What are the technologies of mobile networks?

Answer 4

1. Cellular/PCS/LTE,5G,6G
2. Land mobile radio
3. Satellite

Question 5

Explain harmonization

Answer 5

More rational/efficient re-organisation

Question 6

Which of the following regions of the spectrum is best suited and in fact used for TV transmission

Answer 6

< 1 GHz

Transmissions at lower frequencies attenuate less with distance, which makes these bands ideal for long range transmissions, such as TV ones.

Question 7

Comment on the complementarity of wired and wireless systems.

Answer 7

1. Wireless and optical wireless networks can be thought of as complementary
2. Optical fibre does not reach everywhere, but where it does reach, it provides a very large amount of bandwidth.
3. Wireless access networks, on the other hand, potentially reach almost everywhere, but provide a highly BW-constrained transmission channel, susceptible to a variety of impairments.