Question: In a GPRS scenario with UE/NW operation mode, which entities are involved in bearer binding for user-controlled and network-controlled services, respectively?
Option 1: PCRF (User-Controlled), SGSN (Network-Controlled)
Option 2: PCEF (User-Controlled), PCRF (Network-Controlled)
Option 3: UE (User-Controlled), PCEF (Network-Controlled)
Option 4: PCRF (User-Controlled Services), PCEF (Network-Controlled Services)
Explanation: According to the binding mechanism described for GPRS in UE/NW operation mode, bearer binding is performed by two entities depending on the service type. For user-controlled services, the **PCRF** performs the binding of PCC rules, while for network-controlled services, the **PCEF** is responsible. This division ensures that both types of services are properly managed and integrated into the appropriate PDP contexts based on their QoS requirements and TFT packet filters.