No.
In the CELL_DCH state, the UE does not make cell reselections as it does in all of the other states: instead, the UE moves from cell to cell using handover.
In Cell_DCH, the UE makes measurements and reports them to the UTRAN for action by the UTRAN.
However, in other states, the measurements are not reported to the UTRAN and the UE takes action based on the measurements. (though Cell_FACH measurement has some common things with Cell_DCH)
In Cell_DCH (using DPCHs), UE is addressed explicitly using the physical layer parameters such as the frequency channelization code, scrambling code etc.
In the Cell_DCH, the UE location is known to
1. cell level by the UTRAN
2. serving RNC by the CN
Cell_DCH
is
One of states in connected mode.
The UE is assigned a dedicated physical channel (DPCH) either in response to the RRC connection request or via some UTRAN controlled bearer reconfiguration procedure.
If UE releases (or asked to release by the network) dedicated channel, the UE can move to any other states in RRC connected mode (Cell_FACH, Cell_PCH, [...]
In Cell_DCH state, regardless of data transmission or reception, DPCCH channel needs to be up.
This is why.
Note that it is not efficient to have a code sequence allocated to an inactive user since this may block the assignment of new connections due to the code availability in downlink.
Thus, in such case, DCH channel needs to be de-allocated and the UE should use RACH/FACH channel.
On the other hand, when the buffer of [...]
