Question: What is a primary objective of the S1 interface specification in E-UTRAN, as it pertains to the relationship between eNBs (eNodeBs) and MMEs (Mobility Management Entities)?
Option 1: To mandate the use of a specific transport protocol for all S1 communications.
Option 2: To ensure interoperability between eNBs and MMEs from different manufacturers, while also allowing for future technological advancements in Radio and Transport Networks.
Option 3: To consolidate Radio Network and Transport Network functionalities into a single, unified layer for simplified management.
Option 4: To restrict the S1 interface to only support a limited set of predefined network architectures.
Explanation: The correct answer, Option 2, reflects the dual objective of ensuring interoperability (allowing eNBs and MMEs from different manufacturers to work seamlessly together) and facilitating the introduction of future technologies by separating Radio Network and Transport Network functionalities. This approach promotes a flexible and forward-compatible network architecture, aligning with the principles of E-UTRAN’s S1 interface specification objectives.