Page 634 - Cloud computing: From paradigm to operation

3 XaaS

e.g., chain composed of intrusion protection system (IPS), load balancer and DPI, needs
dedicated configuration and is not flexible in case of e.g., growth of traffic,
adding/removing services to/from the chain.

For the better service flexibility, it is recommended for NaaS CSP to provide programmable
NaaS platform, on which NaaS applications such as vRouter, vCDN, vEPC, etc. can be
deployed, in order to steer the CSC's traffic via customized NaaS applications sequence.
Roles CSC (Tenant A, Tenant B), CSP
Figure
(optional)

Pre-conditions – CSP can deliver dedicated physical network appliances solutions for services, such as
(optional) DPI, intrusion detection, intrusion prevention, load balance, firewall, etc.
Post-conditions – CSP can provide composed either virtual or physical network services or both, or
(optional) services chains dynamically and flexibly according to the CSC's specific service logic in a
shorter deployment, configuration, and update intervals, compared with dedicated
physical network appliances solution.
Derived – Programmable NaaS platform (refer to clause 8.1)
requirements – Dynamic and flexible network services composition and steering (refer to clause 8.2)
– Isolation of service chains for tenants (refer to clause 8.3)

II.3.2.2 NaaS platform use case for platform provision

Title NaaS platform use case for platform provision
Description CSC-A is a network operator. CSC-A wants to build advanced traffic analysis system and
multi-dimensional reporting using dynamically scaling DPI functionalities, opportunistic
services at low risk, and in short time of implementation, multi-tenant CDN, etc., in mobile
networks. However, classical proprietary hardware-based network appliances inhibit the
rapid roll out of new converged network functionalities and revenue earning services. They
neither scale on-demand nor are flexible enough.
CSC-A has the possibility to cope with its business innovation needs by developing
necessary features and services using NaaS platform. Innovating using NaaS platform
allows it to utilize CSP network services and combine them with the functionalities
developed by CSC-A. All functionalities can be integrated by CSC-A on the basis of NaaS
platform to build enhanced network services e.g., virtualized evolved packet core (EPC),
software-based DPI platform, integrated development environments (IDEs). The capacity of
NaaS platform needs to scale elastically according to the utilization of enhanced network
services to secure the required performance. Solutions to support integration of the CSP
network services with the CSC-A's developed software are also needed.
Roles CSP, CSC

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