Alcatel-Lucent 5750 SSC - Manual (Page 12)

Alcatel-Lucent 5750 Subscriber Services Controller 12
On-Demand Service Admission Control
VoD and IMS services introduce
the need to enable deterministic QoS
guarantees for latency, jitter and pack -
et loss. To address this need, the
Alcatel 5750 SSC optionally supports
service admission control (SAC) for
VoD and QoS-sensitive IMS applica -
tions, thereby ensuring a reliable and
consistent quality of experience for
VoD services by preventing the over -
booking of network resource capacity
during periods of peak demand.
For non-IMS applications, the
Alcatel-Lucent 5750 SSC offers
a flexible API to make band width
reservations. IMS applications can
use an ETSI TISPAN-compliant
Rq interface to address the Alcatel-
Lucent 5750 SSC in the capability
of the A-RACF. The SAC function
is implemented as a logically cen tral -
ized policy-decision point, with full
awareness of the first-, second- and
third-mile net work topology and
resource states to ensure that suffi -
cient resources are available at all
critical bottle necks in the end-to-
end network.
Sophisticated bandwidth-allocation
and arbitration policies can be
enforced on links, per forwarding
class, and on individual services that
share a forwarding class. This ability
opti mizes service revenues that can
be derived from installed network
capac ity while ensuring that overall
service quality is maintained with a
fair allocation of shared bandwidth
among services.