8.5.4B Physical channel establishment criteria in CELL_DCH state on the secondary uplink frequency (FDD only)

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

When a physical dedicated channel establishment on the downlink frequency associated with the secondary uplink frequency is initiated by the UE, the UE shall for that downlink frequency start a timer T312 and wait for layer 1 to indicate N312 "in sync" indications. On receiving N312 "in sync" indications on the downlink frequency associated with the secondary uplink frequency, the physical channel is considered established on the downlink frequency associated with the secondary uplink frequency and the timer T312 is stopped and reset.

If the timer T312 expires before the physical channel is established on the downlink frequency associated with the secondary uplink frequency, the UE shall consider this as a "physical channel failure" on the downlink frequency associated with the secondary uplink frequency, and deactivate the secondary uplink frequency as if a HS-SCCH order to deactivate had been received.

NOTE: The criteria defined in this subclause only apply in case the UE performs synchronisation procedure A (FDD only).