Question: Under what condition is the Dedicated Measurement Failure procedure used when partial reporting is allowed and supported in UTRAN Iur interface RNSAP signalling?
Option 1: When all measurements for a UE can no longer be reported due to a general failure.
Option 2: To report that measurement for one or more Radio Links (RL)/Radio Link Sets (RLS) can no longer be provided.
Option 3: If the Dedicated Measurement Initiation procedure was not successfully acknowledged by the SRNS.
Option 4: When the UE Context signalling bearer connection is about to expire.
Explanation: This option correctly identifies the specific scenario under which the Dedicated Measurement Failure procedure is utilized when partial reporting is permitted. It highlights the procedure's role in notifying the SRNS of the inability to report measurements for specific RL/RLS, demonstrating nuanced understanding of measurement handling in UTRAN networks.