Question: In a 5G network, when an operator temporarily serves User Equipment (UEs) of another operator within a specific geographical area to reduce energy consumption, what is a prerequisite for this arrangement, as per 3GPP service requirements?
Option 1: Mutual agreement between operators and adherence to regulatory requirements
Option 2: Implementation of a new Radio Access Technology (RAT)
Option 3: Mandatory upgrade of all served UEs to the latest 5G standard
Option 4: Exclusive use of a specific frequency band for roaming
Explanation: This arrangement, aimed at saving energy by temporarily serving UEs of another operator, is subject to two key prerequisites: regulatory requirements and operators’ policies. This ensures that such agreements do not violate legal standards and are aligned with the business strategies of all involved parties. The correct answer highlights the importance of regulatory compliance and inter-operator agreements in facilitating cooperative network operations for environmental (energy-saving) benefits.