Dear, Maria!
MS gets the T3212 value from System Info on BCCH.
When cell reselection is occured then t3212 shall be reloaded so that the new time to expiry will be:
“time to expiry in the old cell” mod (“T3212 value in the new cell”).
For example, if:
T3212 in the old cell = 360 min,
time to expiry in the old cell = 60 min.
T3212 in the new cell = 240 min min,
then the new time to expiry will be:
60 mod(240)= 60 min
and else,
if:
T3212 in the old cell = 720 min,
time to expiry in the old cell = 360 min.
T3212 in the new cell = 240 min min,
then the new time to expiry will be:
360 mod(240)= 120 min
similar manner is used for time to expiry reload in case of T3212 change in current cell.
B.R.