For distributed multimedia services, it is essential that quality of
service be guaranteed system-wide, including end systems, communication
systems, and networks
For
distributed multimedia services, it is essential that quality of service be
guaranteed system-wide, including end systems, communication systems, and
networks. Although many researchers have addressed issues of QoS management,
little attention has so far been paid to the QoS management services in
distributed multimedia services and applications. To address this deficiency,
we have designed a layered model for end-to-end QoS management called the QoS
management framework. Our framework, which is CORBA-based, includes a generic
QoS MIB for the QoS parameterization of various multimedia services and the
services needed to perform various QoS functions. A key component of this
framework is the QoS management service object (QMSO), which orchestrates resources
at endpoints, coordinating resource management across layer boundaries.
Services such as translation, monitoring, admission, and negotiation are
provided by the QMSO. To validate this concept, we have developed a QoS
management system for managing and controlling the QoS of a distributed
multimedia system called MAESTRO. The QoS management system has been
implemented through CORBA objects and provides an interface to multimedia
applications, which can be dynamic negotiation and renegotiation of QoS by users.
Some performance results in QoS negotiation and renegotiation are also
presented.
UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno
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