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determine whether the specific user has the administrative rights and whether there are
enough internal resources for the handling of the particular request. However, end-to-
end guaranties can be provided only if the level of available resources of all intermediate
routers until the final destination is known. Therefore, the ED uses its interface with the
Resource Control Agents Network for performing the network admission control operation.
C. Problem Approach
We aim to provide the mapping mechanism for SLA to QoS parameters mapping for MPLS
networks. We discuss the ideas of Aquila mapping and architecture in the next section as
is important in our context, and analyze their approach. And then elaborate an approach and
strategy for our work.
III . SLA TO QOS MAPPING
A. SLA to QoS mapping scheme
The paper [LKH02] by Hyo-Jin Lee, Korea mentions a mapping mechanism between
QoS parameters (here, it means application level QoS parameters) and Network
Performance Metrics (NPM). Here, these people have given an architecture of a SLA
monitoring system and have given a method to map QoS to NPM. They are
experimenting with their mapping function by applying it to IP backbone network.
A SLA usually mentions the following QoS parameters: MTBF, MTRS, Delay,
latency, delivery and availability. Now, given above parameters we should be able to map
them to network performance metrics. We should also be able to influence and use this
information of SLA breaking for billing, reporting and even, use as a feedback for the
network to restore its status such that the network again conforms to the SLA. This kind
of system is known as Service Level Management System. It performs 2 functions: SLA
monitoring and SLA provisioning The architecture of the same is given in the paper
mentioned above. Here, we collect NPMs from the network through SLA agent and then
map them to QoS. Say, some application wants a delay of less than 10 sec. We
should be able to collect the Network state (which is nothing ,but NPMs which are:
traffic congestion, throughput, availability and latency). Above mapping as done in
paper is shown for network access services like IP-VPN, leased-line service,
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