Question: In a Policy and Charging Control (PCC) scenario, as described in the context of Rx reference point, what happens to the Binding Info when existing TCP IP flows are removed and new UDP IP flows are added to an ongoing session?
Option 1: The Binding Info for all remaining IP flows is reset to start from (0, 1).
Option 2: The Binding Info for the new UDP IP flows is assigned sequentially, but the existing UDP flows' Binding Info remains unchanged.
Option 3: The removal of TCP IP flows triggers a reassignment of Binding Info for all IP flows (both new and existing) in a sequential manner.
Option 4: The Binding Info for the new UDP IP flows is assigned without affecting the existing Binding Info of the untouched UDP flows, with new values appended to the sequence.
Explanation: In the context of PCC over Rx reference point, when IP flows are modified (e.g., TCP flows removed and new UDP flows added) in an ongoing session, the Binding Info for the newly added flows is assigned without altering the existing Binding Info of the unchanged flows. This ensures continuity for the existing flows while integrating the new ones into the session management framework. The correct approach, as reflected in Option 4, demonstrates this understanding by indicating that new values are appended to the sequence without disrupting the existing assignments.