Question: What determines whether attributes like arfcnDL, arfcnUL, bSChannelBwDL, or bSChannelBwUL must be explicitly set for an NRSectorCarrier in a 5G network?
Option 1: The type of UE (User Equipment) connected to the cell.
Option 2: Whether the attribute values can be unambiguously derived from the referring cell, or if the NRSectorCarrier is used for supplementary uplink, not directly associated with a cell, or uses only part of the cell's channel bandwidth.
Option 3: The transmission direction (txDirection) specified for the NR sector-carrier (downlink, uplink, or both).
Option 4: The physical location of the antennae for the NRSectorCarrier.
Explanation: This is because, according to the specifications, if an attribute's value can be clearly derived from the cell it's associated with, then specifying that attribute is not necessary, unless exceptions apply such as supplementary uplink usage, non-direct cell association, or partial bandwidth usage. This ensures flexibility and efficiency in network configuration while maintaining clarity for all scenarios.