3GPP 24.501 v20.0.0 — the document's own text
D.8.7.2 Conditional IE errors
Taught in 5. Finding your way around TS 24.501 (CT1 — the group that writes what your phone says, in depth), 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
When upon receipt of a UPDS message the UE diagnoses a "missing conditional IE" error or an "unexpected conditional IE" error, or when it receives a UPDS message containing at least one syntactically incorrect conditional IE, the UE shall ignore the message.
When the network receives a message and diagnoses a "missing conditional IE" error or an "unexpected conditional IE" error or when it receives a message containing at least one syntactically incorrect conditional IE, the network shall either:
- try to treat the message (the exact further actions are implementation dependent); or
- ignore the message.