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Stability and throughput improvement for multichannel CSMA and CSMA/CD protocols with optimal bandwidth allocation

Ioannis E. Pountourakis (2000)

Kybernetika

This paper examines appropriate protocols for high speed multiple access communication systems where the bandwidth is divided into two separate asymmetric channels. Both channels operate using slotted non-persistent CSMA or CSMA/CD techniques. Free stations access the first channel while all retransmissions occur in the second channel. We define the stability regions and the rules for optimal bandwidth allocation among the two channels for improvement of the system performance in case of infinite...

Statistical Modelling: Application to the financial sector

Cláudia Roçadas, Teresa A. Oliveira, João T. Mexia (2011)

Discussiones Mathematicae Probability and Statistics

Our research is centred on the stochastic structure of matched open populations, subjected to periodical reclassifications. These populations are divided into sub-populations. In our application we considered two populations of customers of a bank: with and without account manager. Two or more of such population are matched when there is a 1-1 correspondence between their sub-populations and the elements of one of them can go to another, if and only if the same occurs with elements from the...

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