Question: What is the primary purpose of the S15 reference point between the Home NodeB Gateway (HNB GW) and the Policy and Charging Rules Function (PCRF)/Visited PCRF (V-PCRF)?
Option 1: To allocate QoS resources in Fixed Broadband Access Networks for HNB Circuit Switched (CS) calls by transferring dynamic QoS control policies.
Option 2: To manage mobility between Home NodeBs (HNBs) and ensure seamless handover for User Equipment (UE).
Option 3: To authenticate User Equipment (UE) before granting access to the Home NodeB (HNB) network.
Option 4: To bill subscribers based on their data usage in the Fixed Broadband Access Network.
Explanation: The S15 reference point is utilized for transferring dynamic Quality of Service (QoS) control policies to allocate QoS resources within Fixed Broadband Access Networks, specifically for Circuit Switched (CS) calls initiated through Home NodeBs (HNBs), ensuring efficient resource allocation for CS services over fixed broadband networks connected via HNBs.