Information Technology Reference
In-Depth Information
The output of the E2E-QoS-Mngr is a DID configured with the chosen content
variation including the location of the selected TVMs and the corresponding QoS
characteristics of the actual multimedia content.
3.3 Service Manager
The Service Manager (SrvMngr) is responsible for service management and can
be further divided into four subsystems with distinguished functionalities:
The
Customer Service Manager (CustSrvMngr)
acts as a central component
which provides the actual service towards the customer by implementing the
service logic according to the service requirements. It instantiates other EIMS
managers and coordinates the information flow within the EIMS.
•
The
Network Service Manager (NetSrvMngr)
is responsible for managing net-
work connectivity services used to transport the multimedia content with the
requested QoS/QoE guarantees from its source to its consumers through several
established pSLSs. Specifically, it encompasses the functionalities for service
planning, provisioning, offering and fulfillment of the connectivity service, in a
multi-domain context. The NetSrvMngr also strongly interacts with the Service
Monitoring as described in the next bullet.
•
Service Monitoring (ServMon)
provides a means for monitoring the service
with the aim to keep track of the end-to-end QoS level of a particular service
[16]. Service monitoring is mainly provided within the network on aggregated
streams and within the CustSrvMngr for a particular service stream. Therefore,
service monitoring provides means for mapping network QoS (NQoS) - moni-
tored on aggregated streams within the core network - to perceived QoS
(PQoS/QoE) that is relevant on a per stream level [17].
•
The
Terminal Device Manager (TDM)
enables the management of heterogene-
ous end-user devices in terms of capturing the capabilities of the terminal,
PQoS probe configuration including handling its alarms, and license handling
[18].
•
3.4 Adaptation Manager
The Adaptation Manager (AdaptMngr) aims to provide adaptation decisions
according to dynamically varying context conditions coming from various sources
across service and network layers. Thus, the adaptation manager hosts the Cross-
Layer Adaptation Decision-Taking Engine (XL-ADTE) - see also Section 2.2 -
and steers exactly one TVM (in a possible chain of TVMs). That is, the E2E-QoS-
Mngr selects one (or more) TVM(s) during the service request and basically
establishes the QoS-enabled end-to-end multimedia service. The role of the
AdaptMngr is actually to configure each TVM involved within the chain. Fur-
thermore, it adjusts this configuration according to possible changing usage envi-
ronment properties, dynamically received from ServMons and the TDM through
