PDU Session Modification Command Reject

If the UE rejects the PDU-Session-Modification-Command, it sets the 5GSM cause IE of the PDU Session Modification Reject message to indicate the reason for rejecting the PDU session modification.

The SMF supports the following 5GSM causes.

5GSM Cause

SMF Behavior

Cause #26 – insufficient resources

The SMF retains the statistics based on the cause.

Cause #43 – Invalid PDU session identity

The SMF retains the statistics based on the cause and releases the existing PDU session.

Cause #44 – Semantic error in packet filter(s)

The SMF retains the statistics based on the cause.

Cause #45 – Syntactical error in packet filter(s)

The SMF retains the statistics based on the cause.

Cause #83 – Semantic error in the QoS operation

The SMF retains the statistics based on the cause.

Cause #85 – Syntactical error in the QoS operation

The SMF retains the statistics based on the cause.