Image Processing Reference
In-Depth Information
Fig. 8.9 QoS signaling events of per-flow vs. over-reservation control
a viable signaling load (and the related energy consumption), which is of great
importance, especially when cooperative communications increase the network
dynamics.
While recent QoS over-reservation mechanisms are promising for smart network
control designs, they have limited capabilities for being integrated with a hetero-
geneous and dynamic RAN expected in 5G cellular systems. In addition, their
support for SDN and cooperative communication approaches is yet an open
research issue that deserves careful attention. Further details and guidelines are
provided in the subsequent section.
8.4
Integrating Cooperative Strategies and Advanced QoS
Control
This section aims at describing a generic mechanism that is able to exploit SDN
Controller (SDNC) to integrate cooperative communications strategies and network
resource over-reservation management to save energy while guaranteeing the
required QoS. In particular, the SDNC is responsible for granting or denying access
to the network and the related resources in order to ensure that: (1) each admitted
user receives the contracted QoS; (2) the cooperative communication decisions are
managed to enable optimal energy saving across the network. Other functions of the
