Page 409 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

reference model for future Recommendations, e.g., on the performance of DC power feeding
systems. This Recommendation describes extended power feeding architectures using up to 400
VDC, e.g., hybrid redundant DC and AC power feeding based on Recommendation ITU-T L.1201.
URI: http://www.itu.int/itu-t/recommendations/rec.aspx?rec=12882
• ITU-T L.1220: This Recommendation provides an overview of evolution of energy storage for
stationary use for ICT/telecommunication equipment. Global results of investigations from
laboratory and field tests of solutions for site, network, data centre and CPE resilience in smart
sustainable cities. Mobile and portable batteries are out of the scope of this Recommendation.
URI: http://www.itu.int/ITU-T/workprog/wp_item.aspx?isn=10713
ITU-T L.1206: The document discusses multiple power interfaces to ICT equipment operated by
standardized –48V direct current, alternating current source and direct current source up to 400 V
in line with the interfaces, operational voltage and characteristics detailed within ITU-T
Recommendation and ETSI relevant standards. It also includes some details on the power
architecture within the ICT equipment between the ICT power interface and the ICT end load.
URI: https://www.itu.int/itu-t/workprog/wp_item.aspx?isn=13938

ITU-T L.se_DC: Recommendation "smart energy solutions for data centre and telecommunication
centre" defines established clear requirements on data centre and telecommunication centre smart
energy system performance, safety, energy efficiency and environmental impacts.
URI: https://www.itu.int/itu-t/workprog/wp_item.aspx?isn=14153
Table 11-2 provides an analysis of ITU-T SG5 deliverables.

Table 11-2 – Analysis of ITU-T SG5 deliverables

API, Data model,
General, Requirements
Architecture interface, format, Others
definition use cases
profile schema
Fundamental
Cloud service
category
Security
Management ITU-T L.1301, ITU-T L.1410
ITU-T
L.green_mgm_D
C
Inter-cloud,
CSB
SLA, metering
Testing ITU-T L.1202,
ITU-T L.1420,
ITU-T L.1430,
ITU-T L.1302,
ITU-T L.1320,
ITU-T L.1440
Others ITU-T L.1201, ITU-T ITU-T L.1200,
ITU-T L.1204 L.renewable ITU-T L.1300,
ITU-T L.1220,
ITU-T L.1206,
L.se_DC

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