Question: In a cellular network, what is the primary purpose of measuring the Rx-Tx time difference for User Equipment (UE)?
Option 1: To optimize handover decisions based on signal strength and quality.
Option 2: To compensate for propagation delay differences between Downlink (DL) and Uplink (UL) for accurate call setup.
Option 3: To enhance security by validating the UE's location through timing analysis.
Option 4: To improve Quality of Service (QoS) by prioritizing traffic based on latency measurements.
Explanation: Measuring the Rx-Tx time difference is crucial for accurately compensating for the differences in propagation delay between Downlink and Uplink. This compensation ensures precise timing for call setup purposes, vital for maintaining synchronization and quality in wireless communications.