Page 36 - Cloud computing: From paradigm to operation

1 Framework and requirements for cloud computing

– Unified communication: It is recommended that the CSP provides to CSCs a consistent unified user
interface and user experience of communications applications, such as voice, messaging, audio,
video conferencing, etc., across multiple devices and media-types.

12 General requirements for BDaaS
The general requirements for big data as a service (BDaaS) derived from the use cases in clause I.7 are as
follows:
– Resource clustering: It is recommended for the CSP to cluster resources for processing of extensive
data;
NOTE 1 – Resources includes processing, storage and networks, etc.
– Data collection: It is recommended for the BDaaS CSP to collect data from CSCs, CSNs and CSPs;
NOTE 2 – Data includes various types, different formats, real time streaming/static data and CSC data including
users' behaviour data.
– Data storing: It is recommended for the BDaaS CSP to store data with sufficient storage and fulfil
performance demands;
– Data analysing: It is recommended for the BDaaS CSP to analyse data with various kinds of analysis
algorithms;
NOTE 3 – Data analysis algorithms include classification, clustering, regression, association, ranking, etc.
– Data visualizing: It is recommended for the BDaaS CSP to provide reporting tools with multiple styles
of data visualization;
NOTE 4 – Visualization styles include statistical graphics, forms, diagrams, charts, etc.
– Data managing: It is recommended for the BDaaS CSP to support management of data lifecycle and
resources monitoring.
NOTE 5 – Functional requirements for BDaaS are provided in clause 8 of [ITU-T Y.3600].

13 General requirements for inter-cloud computing

The general requirements for inter-cloud computing derived from the use cases in clause I.8 are as follows:
– On-demand assignment of cloud computing resources among CSPs: For assigning cloud computing
resources among CSPs on demand, it is required that a CSP defines (a) a trusted relationship
between cooperating CSPs; (b) an appropriate agreement and means of exchanging data on cost,
performance and other information for each resource; and (c) an agreed methodology for
requesting, using and returning the resources of other CSPs;
– Resource and load distribution: A CSP in an inter-cloud federation is required to utilize appropriate
resources distributed in other CSPs for wide-area load distribution according to the required
promptness, flexibility and cost;
– User environment adaptation: A CSP is required to detect changes in the cloud service user
environment, discover alternative resources in other CSPs for these changes and migrate the service
environment smoothly with minimum impact based on the CSC's approval;
NOTE 1 – These actions are to be performed for all cloud service users.
– Inter-cloud service intermediation: Inter-cloud service intermediation enables the CSP to select the
most suitable cloud services and to create new cloud services by integrating cloud services offered
by other CSPs. It is recommended that the CSP engages in support of intermediation for multiple
cloud services of various cloud service categories such as IaaS, NaaS, PaaS and SaaS;

– Large-scale migration: A CSP in an inter-cloud federation is recommended to be able to guarantee
continuity of all the cloud services in the CSP by large-scale service migration to other federated
CSPs with minimum impact during a desired period. It is recommended to consider the priority of
cloud services when migrating.

NOTE 2 – For more information on functional requirements for inter-cloud computing, see clause 9 of
[ITU-T Y.3511].

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