Page 606 - Cloud computing: From paradigm to operation

3 XaaS

Figure 9-4 – Functions and reference points in VI-FS
9.4.1 Infrastructure access management function

The IAM-F approves virtual desktop resource allocation through I_PA_IAM and the virtual desktop access
through I_DPP_IAM. The IAM-F authorizes resource access from the administrator in order for the RAD-F to
allocate, release, change and distribute resources through the I_IAM_RAD. The IAM-F also sends the request
for resource assignment, change and cancellation from the RAD-F to the RA-F through I_ IAM _RA. Finally,
the IAM-F delivers monitoring information and controls through the I_IAM_MC. A detailed functional
description for the IAM-F is specified in clause 7.1.4.

9.4.2 Performance enhancement for virtualization platform function
The PE-F enhances the performance of virtualization platform and virtual desktop. The PE-F configures
virtualization platform or infrastructure with the PV-F through the I_PE_PV. A detailed functional description
for the PE-F is specified in clause 7.1.3.
9.4.3 Resource assignment function

The RA-F receives the resource assignment which is sent through the IAM-F during the creation of a virtual
desktop. The RA-F assigns the resources to the virtual desktop on the PV-F through I_RA_PV according to the
request from the IAM-F. According to the resource change from the IAM-F, the RA-F re-assigns the resources
to the PV-F through the I_RA_PV. A detailed functional description for the RA-F is specified in clause 7.1.2.
9.4.4 Platform virtualization function

The PV-F configures the DaaS platform according to the PE-F. The PV-F transmits the monitoring information
and receives controls through I_IAM_PV. A detailed functional description for the PV-F is specified in
clause 7.1.1.

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