Question: Upon receiving a notification of a change in MPS EPS Priority, MPS Priority Level, and/or IMS Signalling Priority from the Subscription Policy Repository (SPR), what action does the Policy and Charging Rules Function (PCRF) initiate?
Option 1: Sends an update to the User Equipment (UE) to adjust its transmission power.
Option 2: Triggers a Location Update procedure for the affected UE in the Mobility Management Entity (MME).
Option 3: Requests the SPR to verify the subscription details before proceeding.
Option 4: Initiates the necessary IP-CAN session modification procedure(s) after making corresponding policy decisions (e.g., ARP and/or QCI change).
Explanation: This is correct because, according to the described telecom process, upon receiving notifications of priority changes from the SPR, the PCRF’s role involves making pertinent policy decisions (such as altering Allocation and Retention Priority (ARP) or Quality Class Identifier (QCI)) and then applying these changes through the initiation of IP Connectivity Access Network (IP-CAN) session modifications. This ensures that the network resources are allocated appropriately to match the updated priority levels for MPS services, reflecting in how data sessions are managed and prioritized.