Open Access

Throughput Analysis of Fading Sensor Networks with Regular and Random Topologies

EURASIP Journal on Wireless Communications and Networking20052005:397962

DOI: 10.1155/WCN.2005.554

Received: 30 November 2004

Published: 8 September 2005

Abstract

We present closed-form expressions of the average link throughput for sensor networks with a slotted ALOHA MAC protocol in Rayleigh fading channels. We compare networks with three regular topologies in terms of throughput, transmit efficiency, and transport capacity. In particular, for square lattice networks, we present a sensitivity analysis of the maximum throughput and the optimum transmit probability with respect to the signal-to-interference ratio threshold. For random networks with nodes distributed according to a two-dimensional Poisson point process, the average throughput is analytically characterized and numerically evaluated. It turns out that although regular networks have an only slightly higher average link throughput than random networks for the same link distance, regular topologies have a significant benefit when the end-to-end throughput in multihop connections is considered.

Keywords

throughput Rayleigh fading slotted ALOHA network topology interference

Authors’ Affiliations

(1)
Department of Electrical Engineering, University of Notre Dame

Copyright

© X. Liu and M. Haenggi 2005

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.