Question: In E-UTRAN, which entity typically initiates an MO-LR (Mobile Originated-Location Request) location service for UE-positioning-related services?
Option 1: EPC (Evolved Packet Core)
Option 2: E-SMLC (Evolved Serving Mobile Location Centre)
Option 3: E-UTRAN Node (e.g., eNodeB)
Option 4: UE (User Equipment)
Explanation: For an MO-LR location service, the initiation comes from the mobile device itself, which is seeking its own location information. This aligns with the definition of Mobile Originated services, where the request originates from the User Equipment (UE) rather than the network infrastructure or core (EPC). Thus, in the context of UE-positioning-related services, an MO-LR is initiated by the UE.