Question: What is the primary purpose of the Frame Offset in UTRAN's Node B Application Part (NBAP) signalling?
Option 1: To synchronize dedicated channel uplink transmission with random access procedures across all UEs in a cell.
Option 2: To provide a fixed delay between handover commands and their execution to ensure seamless mobility.
Option 3: To adjust the power levels of broadcast channels based on the number of active dedicated channels.
Option 4: To facilitate the translation between Connection Frame Number (CFN) on Iub/Iur interfaces and System Frame Number (SFN) on Uu interface for a specific UE and cell.
Explanation: The correct answer, Option 4, highlights the Frame Offset's role in synchronizing frame numbering between different interfaces (Iub/Iur to Uu) specifically for each UE and cell. This is crucial for maintaining coherent communication sessions across the network. The other options are incorrect because they describe unrelated procedures or adjustments not directly associated with the Frame Offset's defined purpose in NBAP signalling.