Question: In UTRAN Iub interface NBAP signalling, what is the primary distinction between the usage of Type 1 and Type 2 Timing Adjustment Value LCR (Large Cell Radius) in the context of Node B synchronization for 1.28Mcps TDD?
Option 1: Type 1 is for steady-state phase to maintain precise timing, while Type 2 is for initial adjustments to quickly achieve synchronisation.
Option 2: Type 1 is utilized during the initial phase of Node B synchronization, whereas Type 2 is used in the steady-state phase of Node B synchronization.
Option 3: Type 1 adjusts for cell radius variations, and Type 2 corrects for propagation delays in the TDD frame structure.
Option 4: Type 1 applies to all TDD modes, while Type 2 is specifically designed for 1.28Mcps TDD operations only.
Explanation: The correct answer highlights the specific phases of Node B synchronization where each type of Timing Adjustment Value LCR is applied. Understanding this distinction is crucial for effective network setup and maintenance, as initial synchronization requires rapid alignment, whereas steady-state focuses on maintaining precise timing to ensure continuous, reliable communication services in UTRAN networks.