Question: In an E-SMLC-initiated Location Information Transfer Procedure for UE positioning in E-UTRAN, what does the UE send to the E-SMLC if it cannot perform the requested measurements within the specified Response Time?
Option 1: An LPP Request Location Information message to request an extension of the Response Time.
Option 2: An LPP Provide Location Information message with available information and a cause indication for not providing the location.
Option 3: A positioning failure alert to the MME (Mobility Management Entity) for further action.
Option 4: No response, waiting for a repeat request from the E-SMLC.
Explanation: According to the E-SMLC-initiated Location Information Transfer Procedure, if the UE is unable to perform the requested measurements or the Response Time elapses before obtaining any measurements, it responds with an LPP Provide Location Information message. This message includes any available information and a cause indication explaining why the location information could not be provided, ensuring transparency about the outcome of the positioning request.