Question: What is the primary purpose of the SLm interface in the context of Evolved Universal Terrestrial Radio Access Network (E-UTRAN)?
Option 1: To facilitate downlink positioning between the E-SMLC and UE
Option 2: For network sharing configurations between different E-SMLCs
Option 3: To transport SLmAP protocol messages for uplink positioning between the E-SMLC and an LMU
Option 4: To manage session handovers between E-UTRAN and other radio access technologies
Explanation: The SLm interface is utilized for uplink positioning, serving as a conduit for SLmAP protocol messages exchanged between the E-SMLC (Evolved Serving Mobile Location Centre) and an LMU (Location Measurement Unit), crucial for determining UE location based on network-side measurements.