@article{Wong2007new,
author = {E. W. M. Wong and A. Zalesky and Z. Rosberg and M.
Zukerman},
title = {A new method for approximating blocking probability
in overflow loss networks},
journal = {Computer Networks},
volume = {51},
number = {11},
pages = {2958-2975},
month = {Aug.},
year = {2007},
abstract = {In this paper, we present a new approximation for
estimating blocking probability in overflow loss networks and systems. Given a
system for which an estimate of blocking probability is sought, we first
construct a second system to act as a surrogate for the original system.
Estimating blocking probability in the second system with Erlang's fixed point
approximation (EFPA) provides a better estimate for blocking probability in the
original system than if we were to use the conventional approach of directly
using EFPA in the original system. We present a combination of numerical and
theoretical results that indicate our new approximation offers a better estimate
than EFPA for a certain pure overflow loss network. Moreover, we demonstrate the
accuracy of our new approximation for circuit-switched networks using
alternative routing. We argue that the success of our new approximation is due
to its ability to utilize congestion information imbedded in overflow traffic,
whereas the conventional approach fails to utilize such information.}
}