1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Y.3516 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (09/2017) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS, NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES Cloud Computing Cloud co
2、mputing Functional architecture of inter-cloud computing Recommendation ITU-T Y.3516 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS, NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Service
3、s, applications and middleware Y.200Y.299 Network aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Service
4、s and applications Y.1100Y.1199 Architecture, access, network capabilities and resource management Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Char
5、ging Y.1800Y.1899 IPTV over NGN Y.1900Y.1999 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services a
6、nd networks in NGN Y.2250Y.2299 Enhancements to NGN Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 FUTURE NETW
7、ORKS Y.3000Y.3499 CLOUD COMPUTING Y.3500Y.3999 INTERNET OF THINGS AND SMART CITIES AND COMMUNITIES General Y.4000Y.4049 Definitions and terminologies Y.4050Y.4099 Requirements and use cases Y.4100Y.4249 Infrastructure, connectivity and networks Y.4250Y.4399 Frameworks, architectures and protocols Y.
8、4400Y.4549 Services, applications, computation and data processing Y.4550Y.4699 Management, control and performance Y.4700Y.4799 Identification and security Y.4800Y.4899 Evaluation and assessment Y.4900Y.4999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.3516 (
9、09/2017) i Recommendation ITU-T Y.3516 Cloud computing Functional architecture of inter-cloud computing Summary Recommendation ITU-T Y.3516 specifies inter-cloud computing functional architecture, including functions and functional components, based on the inter-cloud computing framework specified i
10、n Recommendation ITU-T Y.3511. The Recommendation builds upon the functional view of the cloud computing reference architecture (Recommendation ITU-T Y.3502) and makes extensions to functional components with inter-cloud functions. Recommendation ITU-T Y.3516 also describes the mapping between funct
11、ions and functional requirements of inter-cloud computing and examples of inter-cloud related reference points. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T Y.3516 2017-09-13 13 11.1002/1000/13352 Keywords Inter-cloud computing, functions, functional architecture, functio
12、nal component. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Y.3516 (09/2017) FOREWORD The International Telecommunication
13、Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff question
14、s and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on
15、 these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the
16、expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or appl
17、icability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with
18、the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicab
19、ility of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implemen
20、t this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 All rights reserved. No part of this publication may be reproduced, by any means
21、 whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.3516 (09/2017) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 2 6 Overview . 3 6.1 I
22、nter-cloud functional architecture with different patterns . 3 6.2 Relationship with cloud computing reference architecture 4 7 Functions of inter-cloud computing 6 7.1 Business support systems . 6 7.2 Operational support systems . 7 7.3 Peer service integration 9 7.4 Security systems . 11 8 Functio
23、nal components of inter-cloud 12 9 Security considerations . 13 Appendix I Mapping of inter-cloud computing functional requirements and functions 14 Appendix II Reference points of inter-cloud computing 18 II.1 Reference point: I-SSM-Blg . 18 II.2 Reference point: I-SSM-IPM . 18 II.3 Reference point
24、: I-SSM-MR 18 II.4 Reference point: I-SSM-SC 18 II.5 Reference point: I-SSM-PSM . 19 II.6 Reference point: I-Blg-IPM 19 II.7 Reference point: I-Blg-MR . 19 II.8 Reference point: I-Blg-SC 19 II.9 Reference point: I-Blg-SP 19 II.10 Reference point: I-Blg-SA 19 II.11 Reference point: I-Blg-SPM . 19 II.
25、12 Reference point: I-Blg-SLM . 19 II.13 Reference point: I-Blg-PSM . 19 II.14 Reference point: I-SP-SC . 19 II.15 Reference point: I-SLM-SC . 19 II.16 Reference point: I-PSM-SC 19 II.17 Reference point: I-SC-PSI 20 II.18 Reference point: I-SPM-SP 20 iv Rec. ITU-T Y.3516 (09/2017) Page II.19 Referen
26、ce point: I-SP-SA . 20 II.20 Reference point: I-PSM-SP 20 II.21 Reference point: I-MR-SP 20 II.22 Reference point: I-PSM-SA . 20 II.23 Reference point: I-SA-SPM . 20 II.24 Reference point: I-SA-PSI 20 II.25 Reference point: I-PSM-SPM . 20 II.26 Reference point: I-SPM-PSI . 20 II.27 Reference point:
27、I-SPM-ASPM 20 II.28 Reference point: I-SLM-IPM . 21 II.29 Reference point: I-PSM-SLM 21 II.30 Reference point: I-MR-SLM 21 II.31 Reference point: I-SLM-PSI . 21 II.32 Reference point: I-MR-IPM . 21 II.33 Reference point: I-PSM-MR 21 II.34 Reference point: I-MR-PSI . 21 II.35 Reference point: I-PSM-I
28、PM . 21 II.36 Reference point: I-IPM-PSI 21 II.37 Reference point: I-PSM-AIM . 21 II.38 Reference point: I-PSM-EM . 22 II.39 Reference point: I-PSM-BA . 22 II.40 Reference point: I-PSM-AA . 22 II.41 Reference point: I-PSI-AIM . 22 II.42 Reference point: I-PSI-ASPM 22 II.43 Reference point: I-PSI-EM
29、. 22 II.44 Reference point: I-PSI-SA 22 Bibliography. 23 Rec. ITU-T Y.3516 (09/2017) 1 Recommendation ITU-T Y.3516 Cloud computing Functional architecture of inter-cloud computing 1 Scope This Recommendation specifies inter-cloud computing functional architecture, including functions and functional
30、components, based on the inter-cloud computing framework specified in ITU-T Y.3511. The Recommendation builds upon the functional view of the cloud computing reference architecture ITU-T Y.3502 and makes extensions to functional components with inter-cloud functions. The scope of this Recommendation
31、 consists of: overview of inter-cloud computing functional architecture; functions of inter-cloud computing; functional components of inter-cloud computing architecture. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, co
32、nstitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the
33、 Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T X.1601 Recommendation ITU-T X.1601
34、 (2015), Security framework for cloud computing. ITU-T Y.3502 Recommendation ITU-T Y.3502 (2014) | ISO/IEC 17789: 2014, Information technology Cloud computing Reference architecture. ITU-T Y.3511 Recommendation ITU-T Y.3511 (2014), Framework of inter-cloud computing. ITU-T Y.3514 Recommendation ITU-
35、T Y.3514 (2017), Cloud computing Trusted inter-cloud computing framework and requirements. ITU-T Y.3522 Recommendation ITU-T Y.3522 (2016), End-to-end cloud service lifecycle management requirements. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsew
36、here: 3.1.1 activity ITU-T Y.3502: A specified pursuit or set of tasks. 3.1.2 cloud service b-ITU-T Y.3500: One or more capabilities offered via cloud computing invoked using a defined interface. 3.1.3 cloud service customer b-ITU-T Y.3500: Party which is in a business relationship for the purpose o
37、f using cloud services. NOTE A business relationship does not necessarily imply financial agreements. 3.1.4 cloud service provider b-ITU-T Y.3500: Party which makes cloud services available. 2 Rec. ITU-T Y.3516 (09/2017) 3.1.5 functional component ITU-T Y.3502: A functional building block needed to
38、engage in an activity, backed by an implementation. 3.1.6 inter-cloud computing ITU-T Y.3511: The paradigm for enabling the interworking between two or more cloud service providers. NOTE Inter-cloud computing is also referred as inter-cloud. 3.1.7 peer cloud service ITU-T Y.3502: A cloud service of
39、one cloud service provider which is used as part of a cloud service of one or more other cloud service providers. 3.1.8 peer cloud service provider ITU-T Y.3502: A cloud service provider who provides one or more cloud services for use by one or more other cloud service providers as part of their clo
40、ud services. 3.1.9 primary cloud service provider ITU-T Y.3511: In inter-cloud computing, a cloud service provider which is making use of cloud services of peer cloud service providers (i.e., secondary cloud service providers) as part of its own cloud services. 3.1.10 role ITU-T Y.3502: A set of act
41、ivities that serves a common purpose. 3.1.11 secondary cloud service provider ITU-T Y.3511: In inter-cloud computing, a cloud service provider which provides cloud services to a primary cloud service provider. NOTE The primary cloud service provider can use the services of secondary cloud service pr
42、oviders as part of its services offered to cloud service customers. 3.1.12 sub-role ITU-T Y.3502: A subset of the activities of a given role. 3.2 Terms defined in this Recommendation None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: API Application
43、 Programming Interface BSS Business Support System CSC Cloud Service Customer CSP Cloud Service Provider CSU Cloud Service User KPI Key Performance Indicator OSS Operations Support System QoS Quality of Service SLA Service Level Agreement 5 Conventions None. 6 Overview 6.1 Inter-cloud functional arc
44、hitecture with different patterns Inter-cloud computing describes the interworking of cloud service providers (CSPs) in order to deliver cloud services to cloud service customers (CSCs) and cloud service users (CSUs) Rec. ITU-T Y.3516 (09/2017) 3 ITU-T Y.3511. One important target of inter-cloud com
45、puting for CSPs is to take benefit of the inter-cloud relationships established between peer CSPs (through inter-cloud patterns) in order to satisfy cloud service requirements of CSCs. The CSP who provides services for CSCs plays the role of primary CSP. The primary CSP is responsible for the cloud
46、service level agreement (SLA) and interacts with peer CSP(s) within an inter-cloud relationship. An inter-cloud relationship is bidirectional. As illustrated on Figure 6-1, CSP A plays a role of primary CSP when using the services of CSP B for providing services to its own customers, CSC A1 and CSC
47、A2 (highlighted by black coloured arrows). CSP A plays the role of secondary CSP when providing services to CSP B, who plays the role of primary CSP and provides services to its own customers, CSC B1 and CSC B2 (highlighted by grey coloured arrows). Figure 6-1 Illustration of bidirectional relations
48、hip in inter-cloud computing The inter-cloud computing concept is based on the relationship (pattern) among multiple CSPs as follows: peering, federation, and inter-cloud intermediary ITU-T Y.3511. These patterns are different in terms of business models and relationships between CSPs. However, thes
49、e patterns are convergent from the viewpoint of inter-cloud computing functions and architecture. The inter-cloud peering pattern contains only two CSPs and is the fundamental pattern, which may exist on its own or can be used in the other two patterns. The inter-cloud federation pattern involves a group of peer CSPs who mutually combine their service capabilities in order to provide the set of cloud services required by CSCs. The involved peer CSP
