Wireless Communications Network

PREVIEW has developed a robust wireless network to transport sensor data to the APS server

PREVIEW’s WCN offers a customizable alternative that enables to transmit mould and machine gathered data through simple installation and major signal coverage.

Industrial environments with their high attenuation from metal objects, interference from existing communication technology (e.g. other Wi-Fi access points), and machines throughout the workshop (e.g. cordless telephones, microwave ovens), make for a very difficult environment for wireless communication. In particular, a significant reduction of the achievable transmission range of wireless communication technologies is expected, with efficient transmission being usually impossible beyond 30meters. To overcome this, the PREVIEW wireless technology uses external antennas to ensure the transmission range is as high as possible, whilst focusing wireless emission. Flexibility and easy deployment are some of the core advantages of the PREVIEW WCN, particularly:

a) The ability of the individual wireless nodes to be used as transmission devices to bridge distances longer than the maximum transmission range of a single node.
b) The capability of individual wireless nodes to support wireless connectivity at locations where reception is limited and therefore data rates are low
c) Individual nodes are able to identify, set up and maintain a suitable communication topology autonomously, regardless of changing environments.

The wireless units are integrated into a physical case to withstand rough industrial environments (e.g. immersion of dust), which protects the hardware components and prolongs the life of the device. The wireless nodes use a 5GHz band to avoid interference from existing devices (2.4 GHz band).

The PREVIEW wireless system employs a semantic, lossy compression and transmission scheme. This compression scheme allows delivering timely approximate information that is sent almost immediately to the APS for analysis purposes, while continuously transferring incremental updates later on improving precision for archival purposes. Employing this compression and transmission scheme, the APS can decode sensor information incrementally, that is, it can begin to decore information before all information pertaining to one production cycle has been received. For each update the wireless transmission protocol includes an error bound that allows the APS to estimate the quality of the information received so far. This transmission protocol is called the “Incremental Fault-Tolerant Transmission Scheme (INFLATE)”, with the improvement of supporting multi-hop operations, i.e. data transmission operations between multiple wireless nodes.

For more information feel free to consult:
[1] R. Naumann, S. Dietzel, and B. Scheuermann, “Towards more realistic network simulations: leveraging the system-call barrier,” in Ad Hoc Networks, Y. Zhou and T. Kunz, Eds. Springer International Publishing, 2017, pp. 180–191.
[2] R. Naumann, S. Dietzel, and B. Scheuermann, “Best of both worlds: prioritizing network coding without increased space complexity,” in 2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016, pp. 723–731.
[3] R. Naumann, S. Dietzel, and B. Scheuermann, “INFLATE: incremental wireless transmission for sensor information in industrial environments,” in 2015 IEEE International Conference on Advanced
Networks and Telecommuncations Systems (ANTS), 2015, pp. 1–6 [4]R.
[4] R. Naumann, S. Dietzel, and B. Scheuermann, “TANDEM: prioritizing wireless communication for robust industrial process control,” in 2017 26th International Conference on Computer Communications and Networks (ICCCN), 2017.

Industrial Wireless Network
Find out about PREVIEW’s novel transmission protocol.

Industrial Wireless Network – Interview
Roman Naumann, Researcher from Humboldt-Universitaet zu Berlin, tells us about PREVIEW’s Industrial Wireless Network