14.4 Discontinuous reception

25.3083GPPHigh Speed Downlink Packet Access (HSDPA)Overall descriptionRelease 17Stage 2TS

In CELL_FACH state, the UE performs continuous reception of the HS-SCCH (expect measurement occasion frames) if DRX operation in CELL_FACH is not configured. The discontinuous reception is enabled for the UE by the UTRAN by the following methods:

– Moving the UE to CELL/URA_PCH state by means of dedicated RRC reconfiguration procedure.

– Configuring the UE with a DRX Cycle configuration for usage in CELL_FACH state. Details of the DRX operation are described in subclause 14.4.1, 14.4.2 and 14.4.3.

In the reconfiguration procedure to CELL_PCH or URA_PCH states, the UTRAN may indicate two DRX cycles and inactivity time. The UE shall use the first DRX cycle and start the inactivity timer after completing the state transition. If the inactivity timer expires in CELL/URA_PCH state the UE shall start using second DRX cycles.