GSM Location Area Flashcards
1
Q
What are the three elements that make up the LAI?
A
Mobile Country Code
Mobile Network Code
Location Area Code
2
Q
Where is the LAI updated?
A
On the MS SIM card and is also passed on the VLR.
3
Q
What does the Cell Global Identity comprise of?
A
MCC, MNC, LAC and Cell Identity
4
Q
When does the MS perform location updates?
A
Power On
Power Off
Change of LAC
Periodic Update (T3212)
5
Q
What is the Keep Alive or Heartbeat process used for?
A
To ensure the network is not left hanging in the case of a dead battery, damage to the phone or leaving a coverage area.
6
Q
What would a 1 represent in T3212?
A
An update every 6 minutes
7
Q
Where is the T3212 value sent over?
A
The Air Interface via the BCCH
