8.5.6a Radio link failure criteria and actions upon radio link failure on the secondary uplink frequency (FDD only)

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

In CELL_DCH state, after receiving N313 consecutive "out of sync" indications from layer 1 for the established F-DPCH physical channel on the downlink frequency associated with the secondary uplink frequency in FDD, the UE shall for that downlink frequency:

1> start timer T313;

1> upon receiving N315 successive "in sync" indications from layer 1 on the downlink frequency associated with the secondary uplink frequency and upon change of UE state:

2> stop and reset timer T313.

1> if T313 expires:

2> consider it as a "Radio link failure" on the downlink frequency associated with the secondary uplink frequency;

2> deactivate the secondary uplink frequency, as if a HS-SCCH order to deactivate had been received.

Periods in time where neither "in sync" nor "out of sync" is reported by layer 1 on the downlink frequency associated with the secondary uplink frequency do not affect the evaluation of the number of consecutive (resp. successive) "in sync" or "out of sync" indications.