16 ACDC in Idle Mode

25.3003GPPGeneral descriptionRelease 17Stage 2TSUniversal Terrestrial Radio Access Network (UTRAN)

The ACDC feature allows network to control new PS domain access attempts from particular applications in the UE in idle mode to prevent/mitigate overload of the access network and/or the core network.

The applications on the UE may be associated with an ACDC category. At subscription, at least four ACDC categories, and up to 16 ACDC categories, are allocated to the subscriber and stored in the ACDC Management Object (MO) or USIM [9].

The access barring information for each ACDC category is broadcast in SIB. The ACDC capable UE controls the access attempt for a certain application based on the broadcast barring information and the configuration of ACDC categories in the UE.

The following guidelines define the behaviour of a UE configured with ACDC when other access control mechanisms (ACB, EAB and DSAC) are co-existing:

– When DSAC and ACDC are configured together, the PS domain DSAC will be ignored by the UEs.

– When EAB and ACDC are configured together, the UE will first check EAB and then check ACDC.

– For UEs configured with ACDC, ACB is ignored.