This procedure is used to transmit dedicated paging information to one UE in connected mode in CELL_DCH , CELL_FACH or CELL_PCH (FDD only) state. Upper layers in the network may request initiation of paging.
For a UE in CELL_DCH, CELL_FACH or CELL_PCH (FDD only) state, UTRAN initiates the procedure by transmitting a PAGING TYPE 2 message on the DCCH using AM RLC. When not stated otherwise elsewhere, the UTRAN may initiate the UE dedicated paging procedure also when another RRC procedure is ongoing, and in that case the state of the latter procedure shall not be affected.
UTRAN should set the IE “Paging cause” to the cause for paging received from upper layers. If no cause for paging is received from upper layers, UTRAN should set the value “Terminating – cause unknown”.   _{Your Comment}