Jul 262009
LA: location area
RA: routing area
URA: UTRAN routing area
The aboves are the collections of cells.
LA and RA are for CN to track the movement of the UE to facilitate the paging of the mobile when an active radio connection is not available.
A cell can be in up to eight different URAs.
URA size depends on the UE’s velocity. Fasting moving UEs should be in a large URA to make less URA update.
