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Authors:
Andreas Puhm
Michael Kramer
Martin Horauer
Keywords: Distributed Sensor Network; Clock Synchronization; TDMA; LIDAR
Abstract:
Distributed embedded systems utilizing active sensors that share a common media (e.g., light detection and ranging sensors, LIDAR) have to be coordinated to eliminate or reduce interferences between the different sensor nodes. For LIDAR and similar sensor systems it is possible to apply media access methods, like frequency, code and time division multiple access (FDMA, CDMA or TDMA). FDMA and CDMA methods utilize sensor specific parameters for medium access. This can be a drawback, as it is no longer possible or far more difficult to use error correction or measurement enhancement techniques, like multi-frequency measurements, that depend on these parameters. A TDMA scheme frees these sensor specific parameters, but needs additional infrastructure in the form of clock synchronization. The implementation of the synchronization mechanism constrains the TDMA schedules that can be executed. This paper provides an algorithm to ascertain these constraints, and thus determine the requirements for the synchronization mechanism implementation.
Pages: 64 to 70
Copyright: Copyright (c) IARIA, 2015
Publication date: August 23, 2015
Published in: conference
ISSN: 2308-4405
ISBN: 978-1-61208-425-1
Location: Venice, Italy
Dates: from August 23, 2015 to August 28, 2015