Question: In a scenario where a UE has multiple concurrent IMS sessions with common media components, what action does the P-CSCF take to activate resource sharing among these sessions?
Option 1: Assigns new, unique tags to each media component across all sessions.
Option 2: Requests the PCRF/PCF to decide on resource sharing without assigning any tags.
Option 3: Closes all media flows except for one session to prevent resource sharing.
Option 4: Assigns the same existing tag to each media component whose resources can be shared amongst the IMS sessions.
Explanation: To activate resource sharing among multiple concurrent IMS sessions with common media components, the P-CSCF must identify and utilize a common identifier for those sharable resources. By assigning the same existing tag to eligible media components across different sessions, the P-CSCF effectively signals which resources can be shared, facilitating efficient resource utilization without unnecessarily duplicating allocations.