Jul 262009
In URA_PCH, the UE location is known to the URA level.
The URA_PCH state is used by UEs that are moving fast.
Jul 262009
The UE location is known to the level of the cell in Cell_PCH.
The purpose of this state is to save power (performing DRX like idle mode)
but allow rapid network access to the UE by knowing that only one cell needs to be paged (and no RRC connection setup reqired.)
Jul 262009
In the Cell_FACH, the UE location is known to the cell level.
If the UE detects the change in cell identity, it performs a cell update procedure.
The UE is addressed by the C-RNTI(cell radio network temporary identifier) from the RNC that controls the cell which the UE is in.
Jul 262009
In the Cell_DCH, the UE location is known to
1. cell level by the UTRAN
2. serving RNC by the CN
