ISSN : 1796-203X
Volume : 3    Issue : 5    Date : May 2008

A Bluetooth-based Sensor Node for Low-Power Ad Hoc Networks
Jens Eliasson, Per Lindgren, and Jerker Delsing
Page(s): 1-10
Full Text:
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TCP/IP has recently taken promising steps toward being a viable communication architecture for
networked sensor nodes. Furthermore, the use of Bluetooth can enable a wide range of new
applications, and in this article, an overview of the performance and characteristics of a networked
sensor node based on TCP/IP and Bluetooth is presented. The number of Bluetooth-enabled
consumer devices on the market is increasing, which gives Bluetooth an advantage compared to
other radio technologies from an interoperability point of view. However, this excellent ability to
communicate introduces disadvantages since neither TCP/IP nor Bluetooth were designed with
resource-constrained sensor nodes in mind. We, however, argue that the constraints imposed by
general purpose protocols and technologies can be greatly reduced by exploiting characteristics of
the communication scheme in use and efficient and extensive use of available low-power modes.
Furthermore, we claim that a Bluetooth-enabled networked sensor node can achieve an operating
lifetime in the range of years using a total volume of less than 10 cm3. The Mulle Embedded
Internet System (EIS), along with its advanced power management architecture, is presented as a
case-study to support the claims.

Index Terms
Mulle, EIS, Bluetooth, TCP/IP, sensor networks, PAN, power consumption, low-power design, motes.