Question: Which reference point does LM-PC5 utilize for supporting location management interactions between location management clients in different VAL UEs, and what is its origin?
Option 1: PMIPv6 Reference Point, originating from Mobile IP standards
Option 2: PC5 Reference Point, described in the context of Proximity-based Services (ProSe) specifications
Option 3: S1 Reference Point, defined within LTE/EPS Architecture standards
Option 4: X2 Reference Point, utilized for handover procedures between eNodeBs
Explanation: The correct answer is Option 2 because LM-PC5, as per the given context, specifically utilizes the PC5 reference point. This PC5 reference point is associated with Proximity-based Services (ProSe), indicating its relevance to proximity and location-related services, aligning with the purpose of supporting location management functions between different VAL UEs. This highlights the integration of proximity services within the broader telecom architecture for enhanced functionality.