Page 686 - Cloud computing: From paradigm to operation

3 XaaS

In addition, the development functionalities include the building of generated and ready-to-deploy software
packages for NaaS services, NFs and NSs which can be then passed on-boarded for deployment in a cloud
infrastructure. The software package consists of both the implementation software and also the
configuration metadata and scripts.

8 Functional components

This clause presents NaaS functional components definition and description based on NaaS functionalities
identified in clause 7. NaaS functional components include instantiated functional components defined in
[ITU-T Y.3502] and functional components defined in this Recommendation.
The functional components in a functional architecture represent sets of functions that are required to
perform the cloud computing activities for various roles and sub-roles involved in cloud computing. The
functional architecture of NaaS complies with CCRA [ITU-T Y.3502], where dependencies between functions
are defined in the functional architecture.

8.1 Business support system functional components for NaaS products
The functional components for NaaS products (BSS-NaaS products) are shown in Figure 8-1.

Figure 8-1 – Functional components for BSS-NaaS products

Functional components for BSS-NaaS products include the business support system (BSS) functional
components described in clause 9.2.5.4 of [ITU-T Y.3502], i.e., product catalogue functional component,
account management functional component, subscription functional component, billing functional
component and accounts functional component.

These components are used to support NaaS business related functionalities of the NaaS CSP as described in
clause 7.1. In particular:
– The product catalogue functional component provides capabilities for NaaS CSCs to browse the list
of available NaaS service offerings which they can purchase, plus a set of capabilities for the
management of the content of the catalogue which are available to the staff of the NaaS CSP.
Product catalogue entries consist of technical information about each of the NaaS service offerings
(capabilities provided by the NaaS service, interface definitions for the NaaS service), plus related
business information such as pricing or rating;
– The subscription management functional component handles subscriptions from NaaS CSCs to
particular NaaS services, aiming to record new or changed subscription information from the NaaS
CSC and ensure the delivery of the subscribed NaaS service(s) to the NaaS CSC;

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