Admissible number of users in OFDM/TDMA based wireless systems through loss probability estimation considering multifractal traffic modeling

Abstract

In this paper, we present an admission control scheme for an OFDM (Orthogonal Frequency-Division Multiplexing)/TDMA(Time Division Multiplexing Access) based wireless system taking into account the multifractal behaviour of the traffic flows. To this end, first, we show evidences of multifractal characteristics on wireless network traffic traces. These findings motivated us to derive a data loss probability expression that can be applied to the OFDM/TDMA based wireless system. Moreover, the loss probability expression is used to control the admission of new users to the OFDM/TDMA system. Simulations and comparisons to other methods are carried out in order to verify the performance of the proposed loss probability estimation approach and the efficiency of the admission control scheme in accepting new users to the OFDM/TDMA system.