||In recent years, with rapid deployment of the Internet and the increasing of|
the number of people of use, the need for the quality of service has become an
essential requirement of network services. In addition, facing more and more
complicated network resources, how to manage the network resources
effectively is one of the most important issues for the network administrator.
The two kinds of quality of service Architectures: Integrated Services
Architecture (IntServ Architecture) and Differentiated Service Architecture
(DiffServ Architecture) made by Internet Engineering Task Force (IETF) for
the provisioning of QoS in internet. And the Multi-Protocol Label Switching
(MPLS) is adopted for broadband internet recently. By using the MPLS explicit
route, it can make the utilization of network resources more efficient , and can
get the guarantee of quality of service .
In this thesis, the concept of QoS components, which are formed from
physical network to make up the Virtual Networks, can make network
administrator easily to allocate network resources to connections. By using this
approach, the works of network management can be divided into the
management of network quality of service and the management of network
QoS components so ,that the management works can be simplified. In this
thesis, the overlay model, differential services over control load service, is
applied to achieve the above goal. Each virtual network, formed from the
physical network, is regarded as a control load QoS component and QoS
components are interconnected, if there exists overlapped nodes, into a higher
layer network topology for providing connections. QoS components are
considered to be flexible arrangement according to traffic condition. Both of
Worst-shortest Path Algorithm (WSP ) and Best-fit Shortest Path Algorithm
(BSP ) are applied for the establishment of QoS components and the selection
of QoS paths. Simulations are also performed to illustrate that our approach is
applicable for the QoS management in internet.
|| “DiffServ-The Scalable End-to-End QoS Model”, Cisco Systems White|
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