01732nas a2200181   4500008004100000245007300041210006900114260002000183300001500203520107800218100002101296700002301317700002901340700002201369700002001391700002101411856011801432       2002                        eng d00aPerformance Analysis of a Managed Bandwidth Service for ATM Networks0 aPerformance Analysis of a Managed Bandwidth Service for ATM Netw  c27 - 31 January  a 220 - 2253 aIn this paper we are considering methods to improve the performance
of a bandwidth control scheme (i.e. Managed Bandwidth
Service) for an ATM network infrastructure (with application to the
Greek Research and Technology Network - GRNET). These methods
try to increase the efficiency of the system and the utilisation of
the available bandwidth. More specifically, we consider: a) a
bandwidth-resizing algorithm for virtual paths in order to (constantly)
keep the allocated bandwidth very close to the bandwidth
actually used, b) a simple method to estimate the effective bandwidth
for VBR paths that can be used in call admission, and c) a
semi-offline call admission scheme where requests are gathered and
considered for acceptance in regular intervals (with a further improvement,
of allowing connections to be allocated a little before or
after the time initially requested). All these methods were tested in
a simulation setting (with the ATM-TN simulator), and results indicate
that they lead to an increased number of accepted requests and
better network utilisation.1 aBouras, Christos1 aKapoulas, Vaggelis1 aPanagopoulos, Alexandros1 aSevasti, Afroditi1 aChantzi, Chrysa1 aSampraku, Ioanna  uhttps://telematics.upatras.gr/telematics/publications/performance-analysis-managed-bandwidth-service-atm-networks