A circuit-switched network with two types of traffic is modeled as a finite two-dimensional
Markov chain. The problem of trunk congestion under different routing schemes is analyzed.
It is shown that the trunk reservation technique can be used to alleviate trunk congestion in
this heterogeneous traffic environment. It is also shown that two control schemes, namely,
the restricted access and preemption, when properly applied, may minimize the blocking of
one type of traffic while keeping that of the other at a certain level. Some numerical …

Several types of routing and controls for heterogeneous circuit switched networks with two
classes of traffic of unequal arrival times and holding times were introduced. A performance
evaluation was made, based on a fully connected symmetrical network model. It was shown
that the trunk reservation technique can be applied to alleviate trunk congestion caused by
excessive alternate routing at heavy loads. It was further shown that restricted access and
preemptive priority control can be used to enforce routing priority ordering over the two …