Question: In a UTRAN Iur interface, during a Successful Relocation Commit procedure, how is the RELOCATION COMMIT message sent to the target RNC when the UE is not utilizing any radio link in the DRNC?
Option 1: Using the connection-oriented service of the signalling bearer with the inclusion of the D-RNTI IE.
Option 2: Using the connectionless service of the signalling bearer without any UE Context identification.
Option 3: Using the connectionless service of the signalling bearer with the D-RNTI IE to identify the UE Context in the DRNC.
Option 4: Using a dedicated control channel for relocation procedures only.
Explanation: When the UE is not utilizing any radio link in the DRNC, the connectionless nature of the service is required due to the absence of an established connection. Additionally, to ensure proper identification of the UE Context in the DRNC, the D-RNTI Information Element must be included in the RELOCATION COMMIT message, aligning with efficient resource management and accurate context handling during relocation procedures in UTRAN networks.