Question: What is the primary purpose of allowing an operator to temporarily serve User Equipment (UEs) of other operators within a geographical area in a 5G system?
Option 1: To increase network coverage and capacity
Option 2: To save energy for the other operators by stopping their own network infrastructure access within the same area
Option 3: To enable seamless handovers between different operators' networks
Option 4: To prioritize emergency services for UEs of other operators
Explanation: The correct answer is Option 2 because, according to the requirements specified in the 3GPP TS 22.261 document, the primary purpose of this feature is to save energy for the other operators by stopping their own network infrastructure access within the same geographical area during predefined times or under certain conditions.