Clock synchronization issues in Bluetooth-based industrial measurements

The paper addresses clock synchronization issues in a wireless sensor network used for vibration measurements in an industrial environment. After discussing the reasons for using Bluetooth technology in such a context, the paper identifies the synchronization requirements imposed on the sensor nodes clocks by the envisaged application and examines various clock synchronization algorithms, discussing their advantages and applicability to the context being investigated. The paper then proposes an original synchronization approach which exploits some peculiar Bluetooth features and discusses the performance obtained and concludes by outlining open issues to be addressed in future research.