Cooperative Strategies for End-to-End Energy Saving and QoS Control - Novel 3D Media Technologies - page 150

Fig. 8.10 Architecture for energy saving and scalable QoS control scenarios

SDNC include, but not limited to, traffic load balancing to avoid unnecessary
congestion occurrence inside the network. In order to achieve this, the SDNC is
deployed to define appropriate control policies and dictate the enforcement on the
network transport elements (e.g. switches and routers) through appropriate signal-
ling protocols (e.g., OpenFlow protocol [ 22 ]). Hence, as illustrated by Fig. 8.10 , the
SDNC implements two main components: (1) the Control Information Repository
(CIR) as being a database for maintaining network topological and resource infor-
mation including the users profiles; (2) the Admission and Resource Control

(ARC) , as the entity responsible for defining appropriate control policies and
managing the access to the network resources.
Besides, the transport elements implement a Management Information Base
(MIB) and Control Policies Enforcement (CPE) components, as detailed further
in subsequent subsection.

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8.4.1 Network Control Components and Functionalities

To ease the understanding of the network configurations and operations described
later in the Subsec. 8.4.2 , this subsection describes the functionalities of the main
network control components depicted in Fig. 8.10 .