name: PPAC
full_form: Paging Permission with Access Control
context: Currently the DSAC information is only sent in SIB3, so a UE in CELL_DCH state cannot determine if the DSAC information has been changed. Here are two basic scenarios for this issue. Scenario 1: Network load status changes without UE mobility behaviour: As shown in Figure 5.1.2.2-1, at T1, the UE is informed via DSAC that its Access Class is barred for PS. Later, a CS call is established and the UE is switched to CELL_DCH state. At T2, the network congestion for PS domain is relieved and SIB3 is updated in order to allow all the UE's accessing on PS domain (i.e. PS becomes unbarred in DSAC information). However, the UE in CELL_DCH state does not re-acquire the updated SIB3, and thus it is not able to send an Initial Direct Transfer for PS. At T3, the UE is switched to a state other than CELL_DCH state, it re-acquires SIB3 and updates the DSAC info. PS becomes now unbarred. The PS traffic in this case is delayed for a duration equal to T3 minus T2. Figure 5.1.2.2-1: DSAC update issue in
description: Paging Permission with Access Control (PPAC) is a parameter used in the CELL_DCH state to indicate to the User Equipment (UE) about access control for paging, allowing the UE to obtain updated PPAC information through dedicated signalling.
explanation: The context describes PPAC as a parameter that controls access to paging and is transmitted to the UE via signaling. This indicates that PPAC is a configurable value used in network management.
section_title: 8.1	DSAC and PPAC update for the UE in CELL_DCH state
biotag_Context: O,O,B-Parameter,O,O,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,B-Device,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Mode,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,B-Mode,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Mode,O,O,B-Mode,O,O,O,B-Parameter,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,B-Mode,O,O,O,O,B-Mode,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O
biotag_Description: B-Parameter,I-Parameter,I-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Device,I-Device,O,O,O,O,O,O,O,O,B-Device,O,O,O,B-Parameter,O,O,O,O