School of Specs 24.501v20.0.0

3GPP 24.501 v20.0.0 — the document's own text

6.6.2.4 Abnormal cases in the UE

Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).

The following abnormal cases can be identified:

  • Expiry of timer T3586:

On the first expiry of the timer T3586, the UE shall resend the REMOTE UE REPORT message and shall reset and restart timer T3586. This retransmission is repeated two times, i.e. on the third expiry of timer T3586, the UE shall abort the procedure and release any resources for this procedure.

NOTE: After the abortion of the remote UE report procedure, the remote UE report procedure for the remote UE(s) can be restarted and how to restart the procedure is left to UE implementation.

  • Collision of network-requested PDU session release procedure and remote UE report procedure:

If the UE receives a PDU SESSION RELEASE COMMAND message during the remote UE report procedure, and the PDU session indicated in the PDU SESSION RELEASE COMMAND message is the PDU session ID that the UE had indicated in the REMOTE UE REPORT message, the UE shall abort the remote UE report procedure and proceed with the network-requested PDU session release procedure.

  • Collision of remote UE report procedure and N1 NAS signalling connection release:

The UE may immediately retransmit the REMOTE UE REPORT message and stop, reset and restart timer T3586, if following conditions apply:

    • the original REMOTE UE REPORT was initiated over an existing N1 NAS signalling connection; and
    • the previous transmission of the REMOTE UE REPORT message was not initiated due to timer T3586 expiry.