Question $3$

$($a$)$ Describe an example of network convergence between two types of wireless access

network technologies and explain how the converged network works.

$($b$)$ Explain how femto cells work, using a relevant diagram to assist your description.

Discuss how femto cells differ from WiFi networks which also enable Internet access

for WiFi$-$enabled mobile phones.

$($c$)$ When a mobile handset is handed over from one access point $($AP$)$ to another the data

service running on the mobile handset needs to be redirected to the new AP$.$ This

usually takes a long time and is intolerant to real$-$time services such as voice. Explain

how data pre$-$deployment techniques can be utilized to overcome this problem.