Page 630 - Cloud computing: From paradigm to operation

3 XaaS

Appendix II

Use cases of NaaS
(This appendix does not form an integral part of this Recommendation.)

This appendix includes three types of NaaS use cases: NaaS application related use cases, NaaS platform
related use cases and NaaS connectivity related use cases. Each type of NaaS use case is further divided into
general and detailed use cases.

II.1 Use case template
The use cases developed in Appendix II should adopt the following unified format for consistent readability
and convenient material organization.

Title Title of the use case
Description Scenario description of the use case
Roles Roles involved in the use case
Figure (optional) Figure to explain the use case, but is not mandatory
Pre-conditions The necessary pre-conditions that should be achieved before starting the use case.
(optional)
Post-conditions The post-condition that will be carried out after the termination of current use case.
(optional)
Derived requirements Requirements derived from the use cases, whose detailed descriptions are presented in
the dedicated clauses.

II.2 NaaS applications related use cases

This clause provides description of use cases related where NaaS CSC can provision and use network
applications.

NOTE – In the following clauses, XaaS represents any categories of cloud services such as Software as a Service (SaaS),
Platform as a Service (PaaS), IaaS, CaaS, etc.

II.2.1 General use cases
II.2.1.1 General NaaS application use case

Name General NaaS application use case
Description A XaaS CSC or XaaS CSP uses the network applications (e.g., virtual DPI (vDPI), vFW, vCDN)
provided by NaaS CSP. These network applications can be chained by NaaS CSP.
Roles CSC, CSP

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