Question: In a 3GPP network supporting Restricted Local Operator Services (RLOS), how does the Policy and Charging Control (PCC) architecture determine if an IP-CAN Session relates to an IMS RLOS session?
Option 1: Based on the RLOS APN, determined by the PCRF (Policy and Charging Rules Function)
Option 2: Through a specific QoS rule generated for RLOS, authorized by the PCEF (Policy and Charging Enforcement Function)
Option 3: By analyzing the ARP (Allocation and Retention Priority) values set for the session
Option 4: Via an indication from the P-CSCF (Proxy-Call Session Control Function) to the PDN Gateway
Explanation: According to the specified handling of Restricted Local Operator Services in the PCC architecture, the PCRF is responsible for determining if an IP-CAN Session relates to an IMS RLOS session based on the RLOS APN. This highlights the PCRF's role in making policy decisions that affect how different types of sessions are handled within the network, ensuring proper treatment for restricted local operator services without requiring subscription-based checks.