Question: In the UTRAN Iu-BC interface's Service Area Broadcast Protocol (SABP), what is the primary purpose of the Message Structure Information Element (IE) in relation to error reporting?
Option 1: To provide a list of all possible errors that can occur at each level of the message structure.
Option 2: To offer hierarchical context for an occurred error, assigning criticality from top level down to the level above the reported error.
Option 3: To specify the protocol version used in the message structure when an error is encountered.
Option 4: To indicate the preferred error correction mechanism for each level of the message hierarchy.
Explanation: The Message Structure IE provides a hierarchical view with assigned criticality levels, helping in understanding the context of an error reported by the Information Element Criticality Diagnostics IE, crucial for efficient troubleshooting and error management within the UTRAN Iu-BC interface's SABP.