Slotted aloha with priorities and random power

Authors:
E. Altman;D. Barman;A. Benslimane;R. El Azouzi
Affiliations:
INRIA, Sophia-Antipolis, France;Dept. of Computer Science, Boston University, Boston, MA;INRIA, Sophia-Antipolis, France;LIA/CERI, Université d'Avignon, Agroparc, Avignon, France
Venue:
NETWORKING'05 Proceedings of the 4th IFIP-TC6 international conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication Systems
Year:
2005

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Abstract

We study distributed choice of retransmission probabilities in slotted Aloha under power differentiation. We consider random transmission powers and further study the role of priorities (through power control) given either to new arriving packets or to backlogged ones. We study both the cooperative team problem in which a common objective is jointly optimized as well as the noncooperative game problem. We show that the new proposed schemes not only improve the average performances considerably but are also able in some cases to eliminate the bi-stable nature of the slotted Aloha.