Page 95 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

9.2.2.6 Connection management

The connection management functional component provides enforcement of QoS policies regarding the
traffic from and/or to the user layer functional components. The connection management functional
component interacts with the multi-layer functions to retrieve policies stored there and enforces them locally
in the access layer.

9.2.3 Services layer functional components
The services layer functional components include:
• service capabilities;
• business capabilities;
• administration capabilities;

• service orchestration.
9.2.3.1 Service capabilities

The service capabilities functional component consists of the necessary software required to implement the
service offered to cloud service customers. It implements the functionality defined by the service interface,
i.e., the interface offered to cloud service customers, independent of the service implementation.

9.2.3.2 Business capabilities
The business capabilities functional component provides a set of capabilities for accessing the business
function related to the provision of cloud services. The business function itself is contained within the
business support systems functional components.
9.2.3.3 Administration capabilities

The administration capabilities functional component provides a set of capabilities for accessing the
administration function related to the provision of cloud services.

The administration function itself is contained within the operations support systems and business support
systems functional components.

9.2.3.4 Service orchestration

The service orchestration functional component provides coordination, aggregation and composition of
multiple service components in order to deliver the cloud service.

9.2.4 Resource layer functional components
The resource layer functional components include:
• resource abstraction and control;

• physical resources.
9.2.4.1 Resource abstraction and control

The resource abstraction and control functional component is used by cloud service providers to provide
access to the physical computing resources through software abstraction. Resource abstraction needs to
ensure efficient, secure and reliable usage of the underlying infrastructure. The control feature of the
functional component enables the management of the resource abstraction features.
The resource abstraction and control functional component enables a cloud service provider to offer
qualities such as rapid elasticity, resource pooling and on-demand self-service. The resource abstraction and
control functional component can include software elements such as hypervisors, virtual machines, virtual
data storage, and time-sharing.

The resource abstraction and control functional component enables control functionality, enabling
monitoring and management capabilities implemented in the operational support systems functional
component (see clause 9.2.5.3). For example, there can be a centralized algorithm to control, correlate and

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