Question: In a scenario where activating all requested PCC rules would exceed a subscriber's Subscribed Guaranteed Bandwidth QoS, how might the PCRF (Policy and Charging Rules Function) resolve this conflict using Service Pre-emption Priority?
Option 1: By always prioritizing services based on their activation order, with the most recently activated service taking precedence.
Option 2: Through a random selection of active PCC rules to deactivate until the cumulative authorized QoS no longer exceeds the subscriber's limit.
Option 3: By adjusting the Subscribed Guaranteed Bandwidth QoS upwards temporarily to accommodate all requested services.
Option 4: By deactivating one or more active PCC rules with lower pre-emption priorities, allowing a higher priority service to be activated without exceeding the subscriber's QoS limit.
Explanation: The PCRF uses the pre-emption priority of services to manage conflicts where activating all requested PCC rules would exceed the subscriber's Subscribed Guaranteed Bandwidth QoS. By comparing the pre-emption priorities, the PCRF can selectively deactivate lower-priority rules to make room for a higher-priority service, thus resolving the conflict while adhering to the subscriber's QoS limits.