Question: What is the primary purpose of broadcasting a Schedule Message by the Base Transceiver Station (BTS) for Mobile Stations (MS) in the context of Cell Broadcast Service (CBS)?
Option 1: To immediately alert users of emergency situations via ETWS Primary Notification messages.
Option 2: To minimize battery usage in MS by informing them of upcoming CBS messages, allowing selective reception.
Option 3: To provide detailed information about ongoing events to the MS user as part of the CBS Message.
Option 4: To initiate a direct communication link between the BTS and specific MS for personalized alerts.
Explanation: The correct answer highlights the Schedule Message's role in reducing battery consumption in Mobile Stations. By broadcasting the schedule of upcoming CBS messages, the MS can enter a power-saving mode and only receive messages of interest, thus conserving energy.