Page 820 - Cloud computing: From paradigm to operation

5 Intercloud and interoperability

I.2.6 Use case of virtual home gateway in trusted inter-cloud

This use case illustrates management aspect of trusted inter-cloud between CSC and CSP or between CSPs.
The federation pattern of inter-cloud used to illustrate the use case is an example only.

Table I.2.6 – Virtual home gateway in trusted inter-cloud
Title Virtual home gateway in trusted inter-cloud
Description – A large group of CSCs requests from CSP(NaaS) secured access to Internet
with parental control service. A CSP(NaaS) serves such service over virtual
home gateway (vHGW) facilities using network functions virtualization (NFV)
and SDN technologies.
– The CSP(NaaS) forms an inter-cloud federation pattern within a group of peer
CSPs due to lack of own resources for request realization. According to the
management of sensitive CSC's data, the CSP(NaaS) establish a trusted
relationship between CSPs(PaaS) and CSPs(SaaS) involved in federation.
– The CSP(NaaS) forms service chaining on parental control service from a set of
network virtual functions (e.g., virtual firewall (vFW), virtual network address
translation (vNAT), virtual load balancer (vLB)) hosted by CSP(PaaS) and
CSP(SaaS).
– The CSP(NaaS) monitors quality of service chaining and in case of quality
drops below threshold or in case of the realization of particular key
performance indicators (KPIs) (e.g., low power consumption, service
balancing), the service is automatically reallocated within the federation,
respecting policy and governance roles applied.

Roles CSC, CSP(NaaS), CSP(PaaS), CSP(SaaS), CSP(XaaS)
Figure (optional)

Pre-conditions (optional) – The CSP(NaaS) and CSP(PaaS) and CSP(SaaS) are in a trusted inter-cloud
relationship.
Post-conditions (optional) – The CSP(NaaS) guarantees governance policy of SaaS.
– The CSP(NaaS) establishes service chaining between CSP(PaaS) and CSP(SaaS).
– The CSP(NaaS) reallocate service between CSPs among federation in case
service quality drops below threshold or in case of the realization of particular
KPIs (e.g., low power consumption, service balancing).
Derived requirements – policies and governance roles
– confidentiality of CSC's data
– service statistics
– annotation (tagging) of cloud workloads
I.2.7 Use case of distributed document exchange system in trusted inter-cloud

This use case illustrates governance aspect of trusted inter-cloud between CSC and CSP or between CSPs. The
federation pattern of inter-cloud used to illustrate the use case is an example only.

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