Question: In the context of E-UTRAN, what is a prerequisite for initiating SCTP (Stream Control Transmission Protocol) in an EN-DC (E-UTRA-NR Dual Connectivity) scenario involving both eNB (eNodeB) and en-gNB (next-generation NodeB)?
Option 1: The en-gNB must autonomously discover the remote IP endpoint of the eNB.
Option 2: An initial remote IP endpoint of an eNB must be provided to the en-gNB for SCTP initialization.
Option 3: Both eNB and en-gNB must synchronize their clocks before SCTP initialization.
Option 4: The UE (User Equipment) must first establish a connection with the eNB before SCTP is initialized between eNB and en-gNB.
Explanation: In EN-DC scenarios, effective communication between the eNB and en-gNB, such as for SCTP initialization, relies on predefined connections. Providing an initial remote IP endpoint of an eNB to the en-gNB ensures a direct link can be established for SCTP, facilitating dual connectivity and seamless data transfer between the two base stations. This prerequisite underscores the importance of preconfigured network settings for efficient E-UTRAN operations.