name: SBA
full_form: Service Based Architecture
context: Figure C.1.1-1 shows the non-roaming architecture to support SBA interactions in GBA. An SBI capable BSF, HSS and Push-NAF shall implement the SBA interfaces specified in this Annex. An SBI capable NF can invoke SBA services provided by SBI capable NFs and may expose services itself. For this Annex an SBI capable BSF uses and provides SBA services, an SBI capable HSS provides SBA services, a UDM provides SBA service, while an SBI capable Push-NAF only uses SBA services. The BSF, HSS, UDM and Push-NAF reside in the home network. If there is no HSS or if the HSS does not support the N65 and Zh reference points within the GBA architecture, then the BSF shall be configured to use the N68 reference point with the UDM. If the N65 or Zh reference point is available in the HSS, then it shall be used between the BSF and the HSS. Figure C.1.2-1: System Architecture to support SBA in GBA Figure C.1.2-2 shows the architecture using the reference point representation. It should be observed that
description: Service Based Architecture (SBA) is a technology enabler for network functions to interact with each other in a standardized way, facilitating service exposure and invocation across different network components.
explanation: The context explicitly mentions SBA as an architectural approach supporting interactions between network functions like BSF, HSS, UDM, and Push-NAF. This indicates that SBA is not just a protocol or interface but a broader technological concept governing how these components interact.
section_title: C.1.2	Architectural Support
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