Section: 5.7.3c.3 Failure type determination
Content: The L2 U2N Remote UE configured with SL indirect path shall set the indirect path failure type as follows: 1> if the UE initiates transmission of the IndirectPathFailureInformation message due to T421 expiry in accordance with clause 5.3.5.16.1.3: 2> set the failureTypeIndirectPath as t421-Expiry; 1> else if the UE initiates transmission of the IndirectPathFailureInformation message due to reception of the NotificationMessageSidelink including indicationType, in accordance with clause 5.8.9.10.4: 2> set the failureTypeIndirectPath as the value in indicationType received from NotificationMessageSidelink; 1> else if the UE initiates transmission of the IndirectPathFailureInformation message due to sidelink radio link failure in accordance with clause 5.8.9.3: 2> set the failureTypeIndirectPath as sl-Failure; 1> if the target L2 U2N Relay UE (i.e., the UE indicated by sl-IndirectPathRelayUE-Identity in the received sl-IndirectPathAddChange) changes its serving PCell to a different cell from the target cell (i.e. the cell indicated by sl-IndirectPathCellIdentity in the received sl-IndirectPathAddChange) before path addition or change: 2> set the failureTypeIndirectPath as indirectPathAddChangeFailure; The N3C remote UE shall set the indirect path failure type as follows: 1> if the UE initiates transmission of the IndirectPathFailureInformation message due to N3C connection failure: 2> set the failureTypeIndirectPath as n3c-Failure; 1> else if the UE initiates transmission of the IndirectPathFailureInformation message due to Uu radio link failure on N3C indirect path: 2> set the failureTypeIndirectPath as relayUE-Uu-RLF; NOTE: it is out of 3GPP scope how the remote UE detects N3C connection failure, or how the relay UE indicates Uu RLF to the remote UE on the N3C connection.