Question: In UTRAN's Node B Application Part (NBAP) signalling, how is the Maximum Transmission Power defined for a cell when considering multiple downlink physical channels and Transmit Diversity?
Option 1: As the maximum power of the single strongest downlink physical channel.
Option 2: As the linear sum of the power of all uplink physical channels.
Option 3: As the average power of all downlink physical channels across all frequencies in a multi-frequency cell.
Option 4: As the maximum value for the linear sum of the power of all downlink physical channels, considering each channel's power across all branches if Transmit Diversity is applied.
Explanation: This option correctly captures how Maximum Transmission Power is defined in UTRAN's NBAP signalling, accounting for power aggregation across all downlink physical channels and addressing Transmit Diversity by summing power across all branches for affected channels, ensuring regulatory compliance while optimizing network performance.