On PHY and MAC performance in body sensor networks

  • Authors:
  • Sana Ullah;Henry Higgins;S. M. Riazul Islam;Pervez Khan;Kyung Sup Kwak

  • Affiliations:
  • Graduate School of Telecommunication Engineering, Inha University, Incheon, South Korea;Microelectronics Division, Zarlink Semiconductor Company, Caldicot, UK;Graduate School of Telecommunication Engineering, Inha University, Incheon, South Korea;Graduate School of Telecommunication Engineering, Inha University, Incheon, South Korea;Graduate School of Telecommunication Engineering, Inha University, Incheon, South Korea

  • Venue:
  • EURASIP Journal on Wireless Communications and Networking - Special issue on enabling Wireless Technologies for Green Pervasive Computing
  • Year:
  • 2009

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Abstract

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. We 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. We observe best performance at 3cm depth inside the liquid. We further present a simulation study of several low-power MAC protocols for an on-body sensor network and discuss the derived results. Also, the traditional preamble-based TMDA protocol is extended towards a beacon-based TDMA protocol in order to avoid preamble collision and to ensure low-power communication.