Page 603 - Cloud computing: From paradigm to operation

XaaS 3

9.2 Virtual desktop connection and delivery functions

The VDCD-FS comprise DPP-F, UAM-F, CCM-F, and PA-F as shown in Figure 9-2. The VDCD-FS have three
interfaces with other functional groups such as CS-FS, virtual desktop resource management functions
(VDRM-FS), and virtualization infrastructure functions (VI-FS).

Figure 9-2 – Functions and reference points in VDCD-FS
9.2.1 Delivery protocol processing function

The DPP-F delivers the exchanged information to the SC-F through I_SC_DPP. The DPP-F communicates to
the CN-F and the CPC-F to perform the connection negotiation and peripheral event through I_CN_DP and
ICP_DP, respectively. Virtual desktop access information from the CCM_F on I_DP_CCM is forwarded to VI-FS
through I_DPP_IAM. A detailed functional description for the DPP-F is specified in clause 7.2.1.
9.2.2 User access management function

For user authentication, the UAM-F validates a DaaS user with CSU's access information through I_SC_UAM
and connects the user account and profile management function (UAPM-F) through I_UAM_UAPM with
CSU's access information and CSU's account information. A detailed functional description for the UAM-F is
specified in clause 7.2.3.

9.2.3 Client connection management function
The CCM-F delivers and verifies virtual desktop access information to CS-FS through I_SC_CCM. Virtual
desktop access information from the SC-F is transferred to the DPP-F through I_DP_CCM. The CCM-F also

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