Abstract— The impact of the traffic assumption on a slotted non-persistent CSMA technique for WLAN systems is studied, by performing a comparison be- tween a classical but not-realistic Poisson distribution and a self-similar one. The self-similar traffic genera- tion is obtained by using a chaotic system, with struc- tural parameters varied in order to have different self- similarity degrees and activity factors, and to permit a correct comparison with the Poisson traffic. The joint effect of the hidden terminals and capture phenomena has been taken into account, by considering a strictly dependence of the hidden terminals and capture prob- abilities from the number of active users in each slot, in order to make realistic the investigation. The sys- tem topology is centralized, so that a hub in a strategic position realizes packet relay functions. The analysis is performed by means of simulations.
Performance of CSMA Systems with Hidden Terminals and Capture Effects for Poisson and Self-Similar traffics
GIOVANARDI, Alessandra;MAZZINI, Gianluca
2000
Abstract
Abstract— The impact of the traffic assumption on a slotted non-persistent CSMA technique for WLAN systems is studied, by performing a comparison be- tween a classical but not-realistic Poisson distribution and a self-similar one. The self-similar traffic genera- tion is obtained by using a chaotic system, with struc- tural parameters varied in order to have different self- similarity degrees and activity factors, and to permit a correct comparison with the Poisson traffic. The joint effect of the hidden terminals and capture phenomena has been taken into account, by considering a strictly dependence of the hidden terminals and capture prob- abilities from the number of active users in each slot, in order to make realistic the investigation. The sys- tem topology is centralized, so that a hub in a strategic position realizes packet relay functions. The analysis is performed by means of simulations.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
