Nurul Sarkar
School of Information Technology, Auckland University of Technology
Auckland, New Zealand
ABSTRACT
The pi-persistent Medium Access Control (MAC) protocol has been shown to be a suitable candidate for high-speed time-slotted fiber-optic unidirectional bus networks. It is based on a probabilistic· scheduling strategy with Pi (0 ≤ pi ≤ 1) being the probability with which the i-th station (i=1,2,…,N) on the bus access an empty slot if it has a packet for transmission. This paper examines the main aspects of the fairness provision mechanism employed in the pi-persistent protocol. The mean packet delay is considered as one of the criterion for fairness measurement. Simulation results show that the pi-persistent protocol achieving fairness at the price of increased packet delay (both for individual stations and overall network). It actually deteriorates mean packet delays at all upstream stations (in order to equalising the mean delay of all stations) without improving delays at downstream stations.
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How to cite this article
Nurul Sarkar, 2002. Fairness Studies of the pi-Persistent Protocol in Unidirectional Bus Networks. Information Technology Journal, 1: 255-263.
DOI: 10.3923/itj.2002.255.263
URL: https://scialert.net/abstract/?doi=itj.2002.255.263
DOI: 10.3923/itj.2002.255.263
URL: https://scialert.net/abstract/?doi=itj.2002.255.263
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