RRC service states

RRC service states

Idle Mode:

– After UE is switched on it will camp in the a suitable cell. After camping:

– User is able to send and receive system and cell broadcasting information.

– In the idle mode until it transmits a request to establish RRC connection.

Cell_DCH

– Entered from Idle Mode or by establishing a DCH from the Cell_FACH state.

– DPCH and physical downlink shared channel (PDSCH) is allocated to UE.

– UE is in this mode until explicit signalling for Cell_FACH.

Cell_FACH

– No dedicated channel allocated. Data transmitted through RACH and FACH.

– UE listens BCH.

– Cell reselection is performed (RNC is informed).

Cell_PCH

– UE known at a cell level but can be reached via PCH.

– Usel listens BCH, some terminals also BMC.

– In case of Cell reselection automatically moved to Cell_FACH state.

URA_PCH

– UE executes the cell update procedure only if the UTRAN Registration Area is changed.

– DCCH can not be used in this state, all the activities initiated by the network through the

PCCH or RACH.