Page 466 - Cloud computing: From paradigm to operation

2 Cloud Computing management

Figure 4 shows the reference point between the components in the cloud-based network management
functional architecture. All the reference points in Figure 4 are reference points as defined in [ITU-T M.3010].
In order to distinguish these references points in this Recommendation, which can show the relationship
among functional components, they are numbered as r1, r2, r3 r4, and r5 respectively, as explained in
Table 1.

Table 1 – Reference points in cloud-based network management functional architecture

Name Position Definition

r1 Between cloud hypervisor Through reference point r1, a hypervisor function can connect to cloud
function and cloud physical physical element functions to perform the virtualized resource
element function. management functions. (for example, VM management, including but
are not limited to creation, deletion, query, and modification of
virtualized resource.) In this Recommendation, the virtualized resource
will be assigned for building management system itself.
r2 Between management Through reference point r2, management controller function set can
controller function set and interact with cloud hypervisor function. Management controller
cloud hypervisor function. function set sometimes may ask the cloud infrastructure function set to
assign new virtual resources in order to meet new management
requirements. Through this reference point, there is no need for
management controller FS to know any details about the physical layer
resources, and it only sends the command including the requirement
for the virtualized resources, then cloud hypervisor function will handle
the rest.

r3 Between management Reference point r3 is provided from the management controller
service function set and function set to the management service function set. Through this
management controller reference point, applications can use the common functions provided
function set. by the management controller FS. For example, one service application
can search for another service application which may be able to meet
its requirements. Management controller FS can also use this reference
point to perform the management service analysis and composition,
etc.
r4 Between management Reference point r4 is between management service functions at the
service applications. application level. Usually, there are cases when one management
service function need the support of another management service
function, then it just invokes the function provided by that
management service function. Reference point r4 is used in this
situation.
r5 Between management Network to be managed is the target for network management.
service function set and the Through reference point r5, management service functions can interact
NEFs of the network to be with the NEFs in the network to be managed, and perform the actual
managed. network management functions.

458