Question: In a scenario where multiple PCC rules (with both service data flow filters and application identifiers) overlap for an uplink IP packet within an IP CAN bearer, how does the PCEF determine which rule to apply?
Option 1: The PCEF applies all overlapping rules in parallel, combining their QoS parameters.
Option 2: The PCEF selects the PCC rule with the highest precedence and applies only that rule, completing the packet matching process.
Option 3: The decision is based on the type of filter (service data flow or application identifier), always prioritizing one over the other.
Option 4: The PCRF is queried for a dynamic decision each time overlapping rules are detected.
Explanation: According to telecom principles in Policy and Charging Control contexts, when multiple PCC rules overlap (regardless of filter type), the rule with the highest precedence is applied exclusively. This ensures consistent and predictable QoS and charging enforcement for uplink IP packets within an IP CAN bearer, preventing potential conflicts from simultaneous application of multiple rules.