|
DSTO - Measurement Architecture for Defence Network Bandwidth Brokerage
The Problem:
The Defence IP networking environment carries a wide range of traffics over
land and satellite links. Router DiffServ capabilities can be used to
ensure the traffic carried on this network are assigned different
priorities and help protect the Quality of Service (QoS) provided to
real-time applications such as Voice over IP. DSTO investigated the
use of Bandwidth Brokerage and router configuration to guarantee QoS
for mission critical traffic and network efficiency during periods of
heavy use.
Solution:
We assisted DSTO by analysing measurement
architectures, router configurations and admission control algorithms
in order to achieve the required QoS whilst maximising the throughput
of the network.
A network simulator was created to model the proposed architecture.
Different traffics - such as voice, video, and data - were modelled
and sent through the simulated network. This enabled pinpointing of
potential bottlenecks and problems in the network. Cisco router mechanisms
to enable QoS were also modelled and specific configurations investigated
to determine the most suitable one for a given network. Different call
admission schemes, in conjunction with a measurement architecture, were
also considered so as to enable the network to admit as much traffic as
possible without causing an overload. All of these aspects were put
together to create a consistent, robust design for a high network
utilisation with efficient mechanisms for assigning traffic priorities.
The results of our research assisted DSTO in achieving their goal and
are now being incorporated into a Concept Technology Demonstrator.
|
