Jun 202009
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 UE excceeds a certain amount of data the DCH channel needs to be allocated.
These changes between Cell_DCH and Cell_FACH can be done via Transport Channel Type Switching messages.
