Question: In E-UTRAN, how does an E-SMLC (Evolved Serving Mobile Location Centre) obtain location-related information for downlink position methods, such as PRS-based TBS, from an eNodeB?
Option 1: Directly through a dedicated interface between the E-SMLC and all eNodeBs within the network.
Option 2: Via any MME (Mobility Management Entity) that has signaling access to both the E-SMLC and the specific eNodeB in question.
Option 3: Through a centralized location server that aggregates data from all eNodeBs and MMEs in the network.
Option 4: By requesting UEs (User Equipment) to relay the necessary information from the serving eNodeB.
Explanation: This is correct because, according to the specifications, signaling access between the E-SMLC and eNodeB for obtaining location-related information (e.g., timing info, supported cells, and TPs including PRS schedule) is facilitated via any MME that has signaling access to both the E-SMLC and the eNodeB. This indirect approach ensures flexibility and reachability across the network without requiring direct connections between all E-SMLCs and eNodeBs.