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D. Extending Aquila : SLA to QoS mapping in MPLS network
In order to be able to provide proper SLA to QoS map-ping in MPLS networks, we
need to create network services that could be mapped to the service component profiles
of
the applications. These network services can be crested by
considering following
issues which would make it a traffic engineering problem:
1) We need to be able to provide 5 network services as isdone for above DiffServ
network.
2) We need to create a servicecomponent network levelprofile that could be mapped to
the application profile
which are the application/user specified requirement.
3) In MPLS networks, we need to map LSPs and labels and
see how they can be used to
provide 5 network services as mentioned above.
4) We can also explore possiblities for being able to provide given network services
in DiffServ over MPLS networks.
IV. CONCLUSION AND FUTURE WORK
During our work and research, it became evident that there is a lack of systematic
application QoS parameter to network QoS parameter mapping mechanism that we intend
to bridge. Service Level Agreement (SLA) is a formal negotiatedagreement between a
service provider and a customer. When
a customer orders a service from a service
provider, an SLA is negotiated and then a contract is made. In the SLA contract, QoS
parameters that specify the quality level of service that the service provider will guarantee
are included. The service provider must perform SLA monitoring to verify whether the
offered service is meeting the QoS parameters specified in the SLA.
In order to do so, the service provider should be able to systematically map
such network performance metrics and data to application level QoS parameters. In this
report, we have precisely discussed the need to bridge the gap between application level
requirements and specifications and the net-work level parameters. We also refered to few
approaches with the focus on Aquila architecture. As a result of our work, we
intend to propose a formal mapping mechanism between QoS parameters in SLA and the
network performance metrics.
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