Bluetooth Based Smart Senor Networks

Topics: Bluetooth, Wireless, Computer network Pages: 23 (6035 words) Published: February 17, 2013
Bluetooth Based Wireless Sensor Networks –Implementation Issues and Solutions Srdjan Krco
Applied Research Lab, Ericsson Ireland
Invited paper
Abstract – Wireless sensor networks – networks of small devices equipped with sensors, microprocessor and wireless
communication interfaces – are a technology that has gained a lot of interest lately. The broad spectrum of new and
interesting applications, ranging from personal health-care to environmental monitoring and military applications, is
proposed for such networks.
Various wireless technologies, like simple RF, Bluetooth,
UWB or infrared might be used for communication between
sensors. In this paper the main principles, applications and issues of Bluetooth based wireless sensor networks, as well as an implementation of a simple Bluetooth based sensor
network are described. The main problems experienced
during the implementation and applied solutions are
1. Introduction
In [1], a vision, called ubiquitous computing, of the world where humans and computers were seamlessly united is
described. The essence of the vision was the creation of
environments saturated with computing and communication
in an unobtrusive way. Recently, WWRF (Wireless World
Research Forum) and ISTAG (IST Advisory Group) released
their visions of the future communication networks [2], [3]. Both institutions envisage a vast number of various
intelligent devices, embedded in the environment, sensing,
monitoring and actuating the physical world, communicating
with each other and humans.
Today, we are witnessing a rapid proliferation of various
wireless devices with considerable computing power and
fairly small size. These devices are still not, to paraphrase Marc Weiser [1], indistinguishable from the fabric of
everyday life, but are becoming a part of that fabric
(Bluetooth headset built as a part of jewellery for example). Various sensors are already in a broad use today as part of different devices (temperature sensors in home or car heating system, smoke alarms, etc.) or as standalone devices

connected to a network, usually to monitor industrial
processes, equipment or installations.
The advancements in MEMS (micro-electrical-mechanical
systems) technology, wireless communications and electric
components have enabled development of small, low-power
and low-cost devices, called smart sensor nodes, capable of performing various sensing tasks, processing data and
communicating over wireless connections. Such devices,
when organized into a network, present a powerful platform
that can be used in many interesting applications, like health monitoring, security systems, detection of chemical agents in air and water etc. During the last few years significant
research efforts were focused on development of required
hardware resources [4], [5], [6], [7] and efficient
communication protocols [8], [9], [10], [11], [12], [13], [14], to enable networking and collaboration of smart sensor
In the next section the main principles of wireless sensor
networks are given and research issues are explained. Section 3 presents Bluetooth issues related to its use in sensor
networks. An implementation of a Bluetooth based sensor
network is described in section 4 along with some of the
implementation issues and solutions. Section 5 concludes the paper.
2. Wireless sensor networks
Wireless sensor networks comprise number of small devices
equipped with a sensing unit, microprocessor, wireless
communication interface and power source. In contrast to the traditional sensor networks that are carefully planned and
deployed to the predetermined positions, wireless sensor
networks can be deployed in an ad-hoc manner.
Of course, such deployment requires adequate
communication protocols that are able to organize the
network automatically, without the need for human

References: [1] Mark Weiser, “The Computer for the Twenty-First
Century”, Scientific American, 1991
Seattle, WA, August 17-19, 1999.
[6] G.J
ACM/IEEE Mobicom Conference, Seattle, WA, August,
Symposium on Communication Theory and Applications
(ISCTA 2001), Ambleside, UK, July 2001
Proceedings of the ACM MobiCom’99, Washington,
USA, 1999, pp
New York, 1994, pp. 908–909.
[19] G
of Telemedicine and Telecare 1 (1995) 183–184.
[20] P
physical world”, IEEE Personal Communications
(October 2000) 10–15
networks”, ACM MobiCom’99, Washingtion, USA,
[26] D. Estrin, R. Govindan, J. Heidemann, “Embedding the
Internet”, Communication ACM 43 (2000)
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