Question: In a WiMAX IP-CAN (IP Connectivity Access Network) setup, what role can a Policy and Charging Enforcement Function (PCEF) additionally play in relation to the Policy and Charging Rules Function (PCRF)?
Option 1: Solely handles policy enforcement without interacting with PCRF.
Option 2: Acts as a proxy for the PCRF and terminates the Gx reference point from PCRF.
Option 3: Only relocates enforcement functions without transparency to the PCRF.
Option 4: Does not interact with PCRF in WiMAX IP-CAN for policy decisions.
Explanation: In a WiMAX IP-CAN setup, the PCEF not only enforces policies but can also serve as an intermediary (proxy) between the network and the PCRF. This is crucial for managing policy and charging control interfaces. By acting as a proxy, the PCEF ensures seamless communication and policy enforcement without requiring direct PCRF involvement in all aspects of WiMAX IP-CAN management.