As revised 2006.05.04
Bionic Buffalo Tech Note #55
description uses some terms which are not found in the specification. Although they are not formally
defined in the specification, their use is not inconsistent with the specification.
DSMCC describes an architecture of multimedia service providers and service consumers, as well as a
network management component within the network itself. The network management component is
called a session and resource manager, or SRM. Each of these components plays multiple roles.
Illustration 1: Basic roles in a DSMCC system
In other words, a service provider is both a client and a server, while a service consumer is a client in
two different relationships. In DSMCC terms, the service provider and service consumer are both users
of the network. In this context, DSMCC defines six different protocols, some of which are termed
“usernetwork” but are in fact “useruser”. The two UN protocols which are in fact UU protocols are
probably sonamed because they use the same headers as the three “true” UN protocols.
The six protocols are:
the UN configuration protocol, with which a service provider or service consumer
communicates with the SRM to obtain configuration information
the UN session protocol, with which a service provider or service consumer communicates with
the SRM to create sessions and to acquire the use of resources
the UN download protocol (in fact, a useruser protocol), with which a download client acquires
files or objects from a download server
the UN channel change protocol (in fact, a useruser protocol), with which a switched digital
broadcast (SDB) client requests channel changes from a SDB server
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