The
MESCAL project has developed intra-domain and inter-domain cSLS
Invocation Handling software components (named MTAC and e-MTAC respectively).
The design of these components has been tested by an implementation
in oTCL, the interface language of the Network Simulator (ns-2),
which has been used for the performance evaluation of these components.
Both MTAC and e-MTAC are of a distributed nature; therefore they
do not raise any major scalability concerns.
Regarding MTAC, we have shown by means of simulation that it can
perform reasonably well for a variety of traffic scenarios (for
both short-range dependent (VoIP) and long range dependent (Videoconference)
sources) and loading conditions without requiring any reconfiguration
of its parameters and that it compares favourably against other
algorithms existing in the literature for the same simulation setup.
While satisfying the primary objective of target packet loss rate,
MTAC achieves higher utilization and lower blocking compared to
other existing algorithms.
Regarding e-MTAC, we have shown by means of simulation that it performs
reasonably well for all the simulated cases. It satisfies the target
packet loss rate and achieves satisfactory utilization. The simulation
results also clearly illustrate the inter-domain link utilization
gains that can be achieved by incorporating status information from
the inter-domain link in the admission control scheme.
Further
reading:
S.
Georgoulas, P. Trimintzios, G. Pavlou and K. H. Ho, "Measurement
Based Admission Control for Real-time Traffic in IP Differentiated
Services Networks," Proc. ICT 2005, Cape Town, South
Africa, 3-6 May 2005.
[link]
MESCAL deliverable D1.3, "Final specification of protocols
and algorithms for inter-domain SLS management and traffic engineering
for QoS-based IP service delivery", Chapter 9, section 9.7.
[link]
MESCAL
deliverable D3.2, "Final
experimental results: validation and performance assessment of algorithms
and protocols for inter-domain QoS through service-driven traffic
engineering".
[link] |
