A PHY-MAC cross-layer protocol for ad hoc networks with multiple-antenna nodes

Authors:
Ioannis Spyropoulos;James R. Zeidler
Affiliations:
Department of Electrical & Computer Engineering, University of California San Diego, La Jolla, CA;Department of Electrical & Computer Engineering, University of California San Diego, La Jolla, CA
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

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Abstract

In this paper, we propose a physical (PHY) - medium access control (MAC) cross-layer protocol for ad hoc networks with antenna-array-equipped nodes that employ single-antenna transmission and multiple-antenna reception. Our protocol extends the progressive back-off algorithm (PBOA), proposed by Toumpis and Goldsmith, by integrating medium access and power control with optimum receive beamforming (ORB); hence it is named PBOA-ORB. The protocol performance is evaluated via simulations over a single-hop ad hoc network that is subject to a uniform traffic load. It is shown that PBOA-ORB significantly enhances both the aggregate throughput and the energy efficiency of PBOA by harnessing the interference suppression and array gains of receive beamforming. Specifically, for a small number of antennas compared to the number of nodes, the aggregate throughput increases linearly with the number of antennas while the average energy consumption per data packet decreases.