Question: Under what condition is the initiation of the Radio Link Congestion procedure prohibited in the UTRAN Iur interface RNSAP signalling?
Option 1: When the UE (User Equipment) has no active DCHs (Dedicated Channels)
Option 2: During handover procedures between DRNC (Drift RNC) and SRNC (Serving RNC)
Option 3: If a Prepared Reconfiguration already exists for the relevant UE Context
Option 4: When resource congestion is detected only in the Uplink (UL)
Explanation: The correct answer, Option 3, highlights an important nuance in managing radio network resources. Initiating a Radio Link Congestion procedure while a Prepared Reconfiguration exists could lead to conflicting resource allocation decisions, potentially exacerbating congestion or causing inefficient use of resources. By prohibiting the initiation under these conditions, the protocol ensures that resource management actions are coordinated and effective, reflecting a thoughtful approach to handling complex network scenarios in telecom systems.