Question: In UTRAN Iu interface RANAP signalling, if a CN INVOKE TRACE message includes MDT/QoE Configuration IE but lacks the Trace Collection Entity IP Address IE, how should the RNC proceed with the respective configurations?
Option 1: Process the MDT/QoE Configuration normally, as the IP address is not crucial.
Option 2: Request the Trace Collection Entity IP Address from another source to complete the configuration.
Option 3: Suspend all tracing activities until the IP address is provided in a subsequent message.
Option 4: Ignore both MDT and QoE Configurations until a complete set of required IEs, including the IP address, is received.
Explanation: According to specified behavior for abnormal conditions in RANAP signalling, if critical information like the Trace Collection Entity IP Address IE is missing when MDT or QoE Configuration IEs are present in a CN INVOKE TRACE message, the RNC must ignore these configurations. This ensures tracing operations aren't initiated with incomplete settings, preventing operational inconsistencies or security vulnerabilities.