Analysis of asynchronous multi-packet reception in 802.11 distributed wireless networks

Authors:
F. Babich;M. Comisso
Affiliations:
Dipartimento di Elettrotecnica, Elettronica ed Informatica, University of Trieste, Trieste, Italy;Dipartimento di Elettrotecnica, Elettronica ed Informatica, University of Trieste, Trieste, Italy
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

This paper proposes a mathematical framework for evaluating the throughput of an 802.11 Distributed Wireless Network (DWN) when the system allows Multi-Packet Reception (MPR) in asynchronous operating mode. Differently from previous studies on MPR, which assume a certain synchronization between the different sources at the beginning of the respective transmissions, this work analyzes a fully distributed scenario, where each node can access to the medium in a completely asynchronous way. More precisely, a new transmission may begin in an already busy channel, as long as the current channel load is within a given threshold. The presented model, which includes the synchronous scenario as a particular case, is employed to investigate the influence of the number of allowed communications, of the load threshold, and of the minimum contention window on the network performance.