 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
– |
idle
phones continuously listen to the paging channel to
|
|
|
detect
messages directed at them
|
|
|
– |
when
someone initiates call to mobile, message is sent
|
|
|
|
to
home MTSO to find out where mobile currently is
|
|
|
– |
a
packet is then sent to base station in current cell,
|
|
|
|
which
pages the mobile on the paging channel
|
|
|
– |
if
mobile replies, base assigns channel number and
|
|
|
sends
it to mobile
|
|
|
– |
mobile
switches to this channel and starts making
|
|
|
|
ringing
sound
|
|