Section: 5.3.10.3 Detection of radio link failure
Content: The UE shall: 1> if any DAPS bearer is configured and T304 is running: 2> upon T310 expiry in source SpCell; or 2> upon random access problem indication from source MCG MAC; or 2> upon indication from source MCG RLC that the maximum number of retransmissions has been reached; or 2> upon consistent uplink LBT failure indication from source MCG MAC: 3> consider radio link failure to be detected for the source MCG i.e. source RLF; 3> suspend the transmission and reception of all DRBs and multicast MRBs in the source MCG; 3> reset MAC for the source MCG; 3> release the source connection. 1> else: 2> during a DAPS handover: the following only applies for the target PCell; 2> upon T310 expiry in PCell; or 2> upon T312 expiry in PCell; or 2> upon random access problem indication from MCG MAC while neither T300, T301, T304, T311 nor T319 are running and SDT procedure is not ongoing; or 2> upon indication from MCG RLC that the maximum number of retransmissions has been reached while SDT procedure is not ongoing; or 2> if connected as an IAB-node, upon BH RLF indication received on BAP entity from the MCG; or 2> upon consistent uplink LBT failure indication from MCG MAC while T304 is not running: 3> if the indication is from MCG RLC and CA duplication is configured and activated for MCG, and for the corresponding logical channel allowedServingCells only includes SCell(s): 4> initiate the failure information procedure as specified in 5.7.5 to report RLC failure. 3> else: 4> consider radio link failure to be detected for the MCG, i.e. MCG RLF; 4> discard any segments of segmented RRC messages stored according to 5.7.6.3; NOTE: Void. 4> if AS security has not been activated: 5> perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'other';- 4> else if AS security has been activated but SRB2 and at least one DRB or multicast MRB or, for IAB and NCR, SRB2, have not been setup: 5> store the radio link failure information in the VarRLF-Report as described in clause 5.3.10.5; 5> perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'RRC connection failure'; 4> else: 5> store the radio link failure information in the VarRLF-Report as described in clause 5.3.10.5; 5> if T316 is configured; and 5> if SCG transmission is not suspended; and 5> if the SCG is not deactivated; and 5> if neither PSCell change nor PSCell addition is ongoing (i.e. timer T304 for the NR PSCell is not running in case of NR-DC or timer T307 of the E-UTRA PSCell is not running as specified in TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [10], clause 5.3.10.10, in NE-DC): 6> initiate the MCG failure information procedure as specified in 5.7.3b to report MCG radio link failure. 5> else: 6> initiate the connection re-establishment procedure as specified in 5.3.7. A L2/L3 U2N Relay UE shall: 1> upon detecting radio link failure: 2> either indicate to upper layers (to trigger PC5 unicast link release) or send NotificationMessageSidelink to the connected L2/L3 U2N Remote UE(s) in accordance with 5.8.9.10. The UE shall: 1> upon T310 expiry in PSCell; or 1> upon T312 expiry in PSCell; or 1> upon random access problem indication from SCG MAC; or 1> upon indication from SCG RLC that the maximum number of retransmissions has been reached; or 1> if connected as an IAB-node, upon BH RLF indication received on BAP entity from the SCG; or 1> upon consistent uplink LBT failure indication from SCG MAC: 2> if the indication is from SCG RLC and CA duplication is configured and activated for SCG, and for the corresponding logical channel allowedServingCells only includes SCell(s): 3> initiate the failure information procedure as specified in 5.7.5 to report RLC failure. 2> else: 3> consider radio link failure to be detected for the SCG, i.e. SCG RLF; 3> if the SCG is deactivated: 4> stop radio link monitoring on the SCG; 4> indicate to lower layers to stop beam failure detection on the PSCell; 3> if MCG transmission is not suspended: 4> initiate the SCG failure information procedure as specified in 5.7.3 to report SCG radio link failure. 3> else: 4> if the UE is in NR-DC: 5> initiate the connection re-establishment procedure as specified in 5.3.7; 4> else (the UE is in (NG)EN-DC): 5> initiate the connection re-establishment procedure as specified in TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [10], clause 5.3.7;