System capacity in OFDMA-based WiMAX

Authors:
Chadi Tarhini;Tijani Chahed
Affiliations:
UMR CNRS 5157, Evry CEDEX - France;UMR CNRS 5157, Evry CEDEX - France
Venue:
ICSNC '06 Proceedings of the International Conference on Systems and Networks Communication
Year:
2006

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Abstract

In this paper, we study the capacity of broadband wireless OFDMA-based WiMAX systems, in the presence of both constant-bit-rate streaming traffic as well as elastic one, under a dynamic configuration wherein users come to the system and leave it after a finite duration. This duration is function of the resources they obtain for the case of elastic flows; it is not for voice ones. Using Markovian analysis, we calculate several performance measures, such as the blocking probability and mean transfer time, using exact and approximate, quasi-stationary-based, solutions. We eventually show numerically the performance of such a system under different admission figures.