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1 Journal of Telecommunications and Information Technology

1 2003

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Implementation and performance of a new multiple objective dynamic routing method for multiexchange networks

Martins L., Craveirinha J., Climaco J.N., Gomez T.

Journal of Telecommunications and Information Technology

2003

nr 3

60-66

The paper describes new developments of a multiple objective dynamic routing method (MODR) for circuit-switched networks previously presented, based on the periodic calculation of alternative paths for every node pair by a specialised bi-objective shortest path algorithm (MMRA). A model is presented that enables the numerical calculation of two global network performance parameters, when using MMRA. This model puts in evidence an instability problem in the synchronous path computation model which may lead to solutions with poor global network performance, measured in terms of network mean blocking probability and maximum node-to-node blocking probability. The essential requirements of a heuristic procedure enabling to overcome this problem and select "good" routing solutions in every path updating period, are also discussed.