Answer Posted / waseem
CELL_DCH state is characterised by:
A dedicated physical channel is allocated to the UE in
uplink and downlink.
The UE is known on cell level according to its current
active set.
Dedicated transport channels, downlink and uplink (TDD)
shared transport channels, and a combination of these
transport channels can be used by the UE.
CELL_FACH state is characterised by:
No dedicated physical channel is allocated to the UE.
The UE continuously monitors a FACH in the downlink.
The UE is assigned a default common or shared transport
channel in the uplink (e.g. RACH) that it can use anytime
according to the access procedure for that transport
channel.
The position of the UE is known by UTRAN on cell level
according to the cell where the UE last made a cell update.
In TDD mode, one or several USCH or DSCH transport channels
may have been established.
CELL_PCH state is characterised by:
No dedicated physical channel is allocated to the UE.
The UE selects a PCH with the algorithm, and uses DRX for
monitoring the selected PCH via an associated PICH.
No uplink activity is possible.
The position of the UE is known by UTRAN on cell level
according to the cell where the UE last made a cell update
in CELL_FACH state.
URA_PCH State is characterised by:
No dedicated channel is allocated to the UE.
The UE selects a PCH with the algorithm, and uses DRX for
monitoring the selected PCH via an associated PICH.
No uplink activity is possible.
The location of the UE is known on UTRAN Registration area
level according to the URA assigned to the UE during the
last URA update in CELL_FACH state.
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