On PHY and MAC Performance in Body Sensor Networks

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Executive Summary

This paper presents an empirical investigation on the performance of body implant communication using Radio Frequency (RF) technology. In body implant communication, the electrical properties of the body influence the signal propagation in several ways. The authors use a Perspex body model (30 cm diameter, 80 cm height and 0.5 cm thickness) filled with a liquid that mimics the electrical properties of the basic body tissues. This model is used to observe the effects of body tissue on the RF communication. They observe best performance at 3cm depth inside the liquid. They further present a simulation study of several low-power MAC protocols for an on-body sensor network and discuss the derived results.

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