Page 604 - Cloud computing: From paradigm to operation

3 XaaS

uses I_CCM_UAPM to refer to CSC types and profiles from the UAPM-F. A resource request/cancellation is
delivered by I_SC_CCM and transferred to PA-F thorough I_CCM_PA. Additionally, the CCM-F receives the
client connection state from the SC-F through I_SC_CCM to monitor virtual desktop connection and
reconnection requests from the SCUE-F through I_SCUE_CCM against network failure. A detailed functional
description for the CCM-F is specified in clause 7.2.2.

9.2.4 Provisioning and allocation of virtual desktop function
In order to configure the pre-configured virtual desktop environment or create new virtual desktops, the PA-
F uses I_PA_PM, I_PA_OPM, and I_PA_UAPM to get power performance information, policies, and CSU's
account information, respectively. After configuration of a virtual desktop, the PA-F allocates the virtual
desktop using VI-FS through I_PA_IAM. The PA-F also synchronizes the DaaS user's state with the SCUE-F
through I_SCUE_PA. Detailed functional description for the PA-F is specified in clause 7.2.4.

9.3 Virtual desktop resource management functions

The VDRM-FS are composed of monitoring and controlling virtual desktop resource function (MC-F), UAPM-
F, virtual desktop resource allocation and distribution function (RAD-F) and operational policy management
for DaaS function (OPM-F). VDRM-FS also includes high availability for DaaS function (HA-F) and power
management of virtual desktop resource function (PM-F) for more effective management. Figure 9-3 shows
VDRM-FS with two interconnections of VDCD-FS and VI-FS.

Figure 9-3 – Functions and reference points in VDRM-FS
9.3.1 Monitoring and controlling virtual desktop resource

The MC-F has the connection with virtualization infrastructure through I_IAM_MC to receive monitoring
information or send the control commands from or to the infrastructure access management function (IAM-
F). The MC-F is connected with the HA-F through I_MC_HA and with the OPM-F through I_OPM_PM for the
resource state. The MC-F also sends monitoring information of resources and resource usages to the PM-F
and RAD-F with I_MC_PM and I_OPM_MC, respectively. Detailed functional description for the MC-F is
specified in clause 7.3.1.

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