Question: In a UTRA FDD network, what is the primary purpose of transmitting Paging Indicators (PI) associated with the Paging Channel (PCH), mapped into the S-CCPCH?
Option 1: To enhance the security of paging messages for User Equipment (UE)
Option 2: To increase the transmission power for improved PCH reception
Option 3: To facilitate handover decisions between different base stations
Option 4: To support efficient sleep-mode procedures, reducing UE battery consumption
Explanation: The transmission of Paging Indicators (PI) with the PCH, as mapped into the S-CCPCH, supports efficient sleep-mode procedures. This helps the User Equipment (UE) conserve battery life by efficiently managing its active and idle states, awaiting paging messages.