A pseudo-Bayesian Aloha algorithm with mixed priorities for wireless ATM

TitleA pseudo-Bayesian Aloha algorithm with mixed priorities for wireless ATM
Publication TypeConference Paper
Year of Publication1998
AuthorsFrigon, J. - F., and V. C. M. Leung
Conference NamePersonal, Indoor and Mobile Radio Communications, 1998. The 9th IEEE International Symposium on
Pagination45 -49 vol.1
Date Publishedsep.
Keywordsaccess protocols, base station, Bayes methods, channel history, contention free access, delay sensitive request packets, delays, framed environment, high priority packet, low priority packets, mixed priorities, multimedia communication, multimedia environment, multiple priorities, packet radio networks, Poisson distribution, Poisson traffic, priority class, priority parameter, pseudo-Bayesian Aloha algorithm, request packet, reservation MAC protocols, self-similar traffic, simulation results, slotted protocol, telecommunication traffic, transmission probability, waiting time reduction, wireless ATM

In reservation MAC protocols, before obtaining a contention free access to the channel, a mobile must wait for its request packet to be successfully sent to the base station. A pseudo-Bayesian Aloha algorithm with multiple priorities is proposed in this paper to reduce the waiting time of delay sensitive request packets in a multimedia environment. Packets are transmitted in each slot according to a transmission probability based on the channel history and a priority parameter assigned to their priority class. An adaptation of the slotted protocol to the framed environment is also described. Simulation results are presented and show that the protocol offers a significant delay improvement for high priority packet with both Poisson and self-similar traffic while low priority packets only experience slight performance degradation


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