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26829 Industrial wireless networking with resource constraint devices
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Das, K. (2015) Industrial wireless networking with resource constraint devices. PhD thesis, University of Twente. CTIT Ph.D.-thesis Series No. 15-367 ISBN 978-90-365-3994-4

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During the last decade, wireless technologies have revolutionized the industrial automation sector by enabling wireless sensing and actuation for industrial applications. Most of these recently developed industrial standards are built on top of IEEE802.15.4 interface, which uses 2.4GHz frequency band for communication. Because of the wide use, reliable communication with low latency cannot always be guaranteed on this frequency band. While satisfying the requirements of monitoring applications quite well, current industrial standards have several limitations to address the requirements of time-critical control applications. For instance, owing to the use of a centralized network management scheme, widely used industrial standards such as WirelessHART and ISA100.11a cannot handle network disturbances in a real-time manner. Moreover, the I/O devices (sensors and actuators) in these systems have to go through a complex network joining process, which takes a lot of time and energy.

The network devices in industrial applications are typically expected to run for a long time without maintenance. Replacing batteries and main powering of these nodes are often not practical in industrial environments. To address this issue, energy harvesting technologies are becoming popular as an alternative power source for the industrial I/O devices. However, present energy harvesters can only produce a little amount of energy that forces the harvester powered I/O devices to shut down frequently. Consequently, these I/O devices need to re-join the network to resume their task, which consumes additional energy. Clearly, this is a huge overhead for resource constraint I/O devices.

To deal with the above mentioned limitations of existing industrial systems, we propose two hierarchical network management schemes where blocks of communication resources are delegated to the routers to locally manage the I/O devices. The proposed schemes are able to cope with the network disturbances quickly with low overhead. Next, we propose a fast network joining scheme for I/O devices that is able to reduce the network joining overhead and make the network more suitable for harvester powered I/O devices. In addition, we propose a data publication scheme for the harvester powered I/O devices by utilizing spatial diversity that can improve the communication reliability. Last but not least, with the advances in energy harvesting technologies, a new industrial application class called fit-and-forget system, in which I/O devices are only powered by energy harvesters, is attracting much attention. To address the requirements of such I/O devices with strict energy budget, we propose an asynchronous communication scheme that allows harvester powered I/O devices to transmit their data whenever they harvest enough energy.

Item Type:PhD Thesis
Supervisors:Havinga, P.J.M.
Research Group:EWI-PS: Pervasive Systems
Research Program:CTIT-General
Research Project:WIBRATE: Wireless Self Powered Vibration Monitoring And Control For Complex Industrial Systems, RICH++: Reliable IP for time synchronized Channel Hopping networks
Uncontrolled Keywords:Industrial wireless Networks, Industrial automation, WSN, IWSN, Resource constraint devices, Energy harvesting communication, ISA100.11a, WirelessHART, DECT, IEEE802.15.4, Channel hopping, Industrial channel model, Factory environement
ID Code:26829
Deposited On:17 February 2016
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