Y.2012 consented at the July SG 13 meeting
describes the functional architecture of the NGN.
architecture described supports the delivery of services such as multimedia
services, conversational services, and content delivery services (eg video
streaming and broadcasting).
functional architecture shall incorporate the following principles according to
for multiple access technologies: The NGN functional architecture shall offer
the configuration flexibility needed to support multiple access technologies.
control: This will enable adaptation to the distributed processing nature of
packet-based networks and support location transparency for distributed
control: The network control interface should be open to support service
creation, service updating, and incorporation of service logic provision by
service provisioning: The service provisioning process should be separated from
transport network operation by using the above-mentioned distributed, open
control mechanism. This is intended to promote a competitive environment for
NGN development in order to speed up the provision of diversified NGN services.
for services in a converged network: This is needed to generate flexible,
easy-to-use multimedia services, by tapping the technical potential of the
converged, fixed-mobile functional architecture of the NGN.
security and protection: This is the basic principle of an open architecture.
It is imperative to protect the network infrastructure by providing mechanisms
for security and survivability in the relevant layers.
entities should incorporate the following principles:
entities may not be distributed over multiple physical units but may have
entities have no direct relationship with the layered architecture.
However, similar entities may be located in different logical layers.
Although the scope of the Rec. is primarily NGN
architecture, it also takes into account legacy PSTN/ISDN terminals and/or
interworking with the PSTN/ISDN which is clearly is an important consideration
with respect to NGN deployment. Three additional Recommendations were consented
in this area Y.2031, Y.2261 and Y.2271.
a new architecture, NGN will bring an additional level of complexity beyond
that of existing networks. In particular, support for multiple access
technologies and mobility results in the need to support a wide variety of
network configurations. Some examples of configurations are provided to provide
put in context the architecture description.