Home List of Titles Performance analysis of IEEE 802.11 WLANs with saturated and unsaturated sources
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- Performance analysis of IEEE 802.11 WLANs with saturated and unsaturated sources
- Nguyen, Suong H.; Vu, Hai L.; Andrew, Lachlan L. H.
- This paper proposes a comprehensive but tractable model of IEEE 802.11 carrying traffic from a mixture of saturated and unsaturated (Poisson) sources, with potentially different quality-of-service (QoS) parameters, i.e., TXOP limit, CWmin, and CWmax. The model is used to investigate the interaction between these two types of sources, which is particularly useful for systems seeking to achieve load-independent 'fair' service differentiation. We show that, when the TXOP limit for unsaturated sources is greater than one packet, batches are distributed as a geometric random variable clipped to TXOP limit. Furthermore, we present asymptotic results for access delay distribution, which indicates that it is infeasible to obtain real-time service in the presence of eight or more saturated sources, regardless of the real-time traffic load, given that all stations use a CWmin of 32.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Advanced Internet Architectures
- IEEE Transactions on Vehicular Technology, Vol. 61, no. 1 (Jan 2012), pp. 333-345
- Publication year
- FOR Code(s)
- 08 Information and Computing Sciences; 09 Engineering; 10 Technology
- EDCA; Enhanced distributed channel access; Heterogeneous traffic; IEEE 802.11
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