Page 707 - Cloud computing: From paradigm to operation

XaaS 3

Concerning NaaS platform related requirements described in clause 8 of [ITU-T Y.3512], ''programmable NaaS
platform'', ''isolation of service chain for tenants'' and ''flexible scaling of NaaS platform'' requires that the
OSS functionalities be flexible and efficient enough to allow for the instantiation of network services, network
functions and corresponding cloud computing resources in an automated manner.

Regarding NaaS connectivity related requirements identified in clause 9 of [ITU-T Y.3512], ''unified network
control mechanism, ''elastic network reconfiguration'', ''leveraging transport networks dynamically'' and
''seamless and end-to-end solution of bandwidth'', this requires that the NaaS architecture provides OSS
functionalities that support the real-time control, management and orchestration of end-to-end connectivity
across the NaaS cloud computing infrastructure as well as access and core network domains.

I.6 Mapping and derivation of functionalities for NaaS products and NaaS services development
''Integration of software applications'' requirements as described in clause 8.5 of [ITU-T Y.3512] implies that
integration of these applications on the NaaS platform allows the building and design of combined solutions
which will be tested prior to their deployment by the NaaS CSP. Functionalities for the development of NaaS
services are therefore required to be supported in the NaaS architecture.

I.7 Mapping and derivation of functionalities related to NaaS business

[ITU-T Y.3512] does not explicitly address requirements related to NaaS business capabilities since the
requirements in [ITU-T Y.3512] are related to the three types of NaaS services, i.e., NaaS application, NaaS
platform and NaaS connectivity. However, these business capabilities have to be addressed in the NaaS
architecture to support the management of NaaS service offerings by the NaaS CSP including NaaS CSC
requests for selection and purchase of NaaS products and services available in the NaaS CSP product
catalogue.

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