Abstract
This paper proposes a new approach to designing alternate routing algorithms for
all-optical wavelength-division multiplexing networks in order to reduce the connection
blocking probability. The key idea is to try to route traffic in approximately the
optimal way of splitting the traffic among the multiple routing paths between each
source-destination pair. The optimal way of splitting the traffic among the multiple
routing paths between each source–destination pair is obtained by solving a nonlinear
multicommodity flow optimization problem. Two alternate routing algorithms, namely,
traffic intensity based fixed-alternate routing algorithm and traffic intensity based
dynamic-alternate routing algorithm, are proposed based on this approach. Simulations
are performed to study the performances of the proposed alternate routing algorithms.
Our simulation results show that the alternate routing algorithms designed according to
the optimal way of splitting the traffic can effectively reduce the connection blocking
probability.
© 2008 IEEE
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