8.3.17 SCG Failure Information Report

38.4233GPPNG-RANRelease 17TSXn Application Protocol (XnAP)

8.3.17.1 General

The purpose of the SCG Failure Information Report procedure is to provide SCG mobility related information to the S-NG-RAN node.

The procedure uses UE-associated signalling.

8.3.17.2 Successful Operation

Figure 8.3.17.2-1: SCG Failure Information Report, successful operation

The M-NG-RAN node initiates the procedure by sending the SCG FAILURE INFORMATION REPORT message to the S-NG-RAN node. Upon receiving the message, the S-NG-RAN node shall assume that a PSCell change failure event was detected.

The SCG FAILURE INFORMATION REPORT message may include:

– the SN Mobility Information IE, if the SN Mobility Information IE was sent for the PSCell change procedure from the S-NG-RAN node;

– the Source PSCell CGI IE, if the Source PSCell CGI IE was sent for the PSCell change procedure from the S-NG-RAN node.

If the SCG FAILURE INFORMATION REPORT message includes the Source PSCell CGI IE, the S-NG-RAN node shall, if supported, store the information.

If the SCG FAILURE INFORMATION REPORT message includes the Failed PSCell CGI IE, the S-NG-RAN node shall, if supported, store the information and act as specified in TS 38.300 [9].

If received, the S-NG-RAN node uses the above information for SCG failure reason detection and optimisation.

8.3.17.3 Unsuccessful Operation

Not applicable.

8.3.17.4 Abnormal Conditions

Void.