Performances of burst admission control schemes with cell multiplexing in ATM networks

Authors:
Sang-Won Min;Bok-Ki Kim
Affiliations:
Division of Electronics Engineering, Kwangwoon University, Seoul 139-701, South Korea;Division of Electronics Engineering, Kwangwoon University, Seoul 139-701, South Korea
Venue:
Computer Communications
Year:
2001

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Abstract

In this paper, we consider two burst admission control (BAC) schemes with cell multiplexing. One is the burst admission by threshold (BAT) scheme which uses the BAC function by comparing a threshold value with the queue size on the epoch receiving a burst request. Another is the burst admission by prediction of cell losses (BAPCL) scheme, which is based on the fact that it is possible to calculate the queue sizes at burst release times when there is a burst request. By a multi-level model with an MMDP/D/1/K queuing system, the performance and the effect of the two schemes are studied in view of burst and cell levels. Also, the performance of the peak bit-rate reservation (PBRR) scheme without cell buffering is considered with a backoff state. By numerical examples, we discuss the dependence of system performances on the traffic and the system parameters. In order to show the increase of multiplexing gain by the BAC schemes with cell multiplexing, we compare the admissible loads of the BAT and BAPCL schemes with those of the PBRR and the pure cell multiplexing schemes, where we can see that the BAT scheme has almost the same performance as the BAPCL scheme though the latter is superior to the former for most cases, especially for the stringent cell-loss sensitive case.