Question: In UTRAN Iu interface RANAP signalling, what is the primary purpose of transmitting Cell Load Information Group IE from BSC to RNC?
Option 1: To synchronize cell identifier databases between BSC and RNC
Option 2: To report faults in the source cell's transmission equipment
Option 3: To initiate automatic software updates for base stations
Option 4: To support cell load-based inter-system handover by providing current traffic load information of the source cell
Explanation: The Cell Load Information Group IE conveys the current traffic load in the source cell, crucial for the RNC to make informed decisions regarding cell load-based inter-system handover, ensuring efficient resource allocation and minimizing network congestion.