Question: What triggers a Node B to respond with a `CELL RECONFIGURATION FAILURE` message when receiving a `CELL RECONFIGURATION REQUEST` with an IPDL Indicator set to "Active", assuming no ongoing IPDL?
Option 1: The requested maximum transmission power exceeds the Maximum DL Power Capability of the Local Cell, which belongs to a Power Local Cell Group.
Option 2: The presence of an active handover procedure for the cell in question.
Option 3: No IPDL parameters are stored in the Node B defining the IPDL.
Option 4: The Local Cell's operating frequency band is not supported by the Node B's hardware configuration.
Explanation: According to the specified behavior for handling `CELL RECONFIGURATION REQUEST` messages with an IPDL Indicator set to "Active", if there are no stored IPDL parameters in the Node B that define the IPDL, the Node B responds with a `CELL RECONFIGURATION FAILURE` message. This is crucial for ensuring that IPDL (Intra-Node B Payload Distribution List) operations can be properly configured and executed based on predefined parameters, highlighting the importance of parameter availability for successful cell reconfiguration in UTRAN networks.