Abstract:
Multiexchange networks with direct routing (simple), alternate
routing (hierarchical) and alternate routing (symmetrical)
networks are studied in this work.
Network systems are studied by digital simulation. Roulettemodel
simulation method is used in this case. The computer program
is written in Fortran IV and run in IBM 4331. The validity of the
simulation model cheeRed with the similiar results obtained from
analytical or exact solution method ( which is derived on the
basis of classical probability theory) for small systema. The
equations derived for different simple systems in exact solution
method are solved with Gaussian-elimination technique.
Three, four and.five exchange networks are studied in the
present work. Maximum number of links considered here are ninety
(90) and the traffic considered from 0.5 to 0.85 erlangs. 'Congestion
probability' and 'Traffic handling capacity' are considered
as performance indices of the network systems. Results obtained
from exact solution and simulation methods are presented graphically.
The performance of symmetrical network is the best among
the three systems studied followed by direct routing (simple) and
alternate routing networks (hierarchical).
