Question: In the context of Location Services (LCS) as per 3GPP standards, where are Location Request messages sent for a UE with E-UTRAN access to request services like location estimates or assistance data transfer?
Option 1: To the Core Network (CN) directly
Option 2: To the Serving Gateway (S-GW)
Option 3: To the Mobility Management Entity (MME)
Option 4: To an E-SMLC (Evolved Serving Mobile Location Centre)
Explanation: According to the 3GPP standards for Location Services, when a UE has E-UTRAN (LTE) access, Location Request messages for services such as obtaining a location estimate or transferring assistance data to the target UE are specifically sent to an E-SMLC. This is because the E-SMLC is responsible for handling location services in the LTE network architecture, interacting with the MME and other elements as necessary to fulfill location service requests.