Radio channel characterization at 5.85 GHz for wireless M2M communication of industrial robots

The fourth industrial revolution, also referred to as Industrie 4.0, has triggered a number of research projects to improve communication systems for industrial environments. Wireless technologies for mission-critical machine-to-machine communication are expected to enable very efficient and highly flexible production processes. It is especially challenging for wireless interfaces to fulfill the required end-to-end latency and the reliability constraints of the automation industry. In order to design novel PHY and MAC schemes for ultra low delay, ultra reliable and deterministic transmission of data, e.g., through optimized pulse shaping, we study the indoor radio propagation in a representative factory automation cell where industrial robots are to be controlled. We performed channel measurements using a broadband channel sounder at 5.85 GHz carrier frequency. During the measurements, the robots were in motion and executed a typical pick-and-place process. From the recorded data we evaluate the channel characteristics and calculate relevant delay statistics. We distinguish two measurement series that differ in the scattering environment and present the derived parameters. Finally, we discuss the impact of our results on the design of new 5G waveforms for industrial radio systems.

[1]  Henrik Klessig,et al.  Requirements and current solutions of wireless communication in industrial automation , 2014, 2014 IEEE International Conference on Communications Workshops (ICC).

[2]  Andreas Willig,et al.  Wireless Technology in Industrial Networks , 2005, Proceedings of the IEEE.

[3]  Gerhard P Hancke,et al.  Introduction to Industrial Control Networks , 2013, IEEE Communications Surveys & Tutorials.

[4]  Lars Thiele,et al.  QuaDRiGa: A 3-D Multi-Cell Channel Model With Time Evolution for Enabling Virtual Field Trials , 2014, IEEE Transactions on Antennas and Propagation.

[5]  D. Hampicke,et al.  Characterization of the directional mobile radio channel in industrial scenarios, based on wideband propagation measurements , 1999, Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).

[6]  Theodore S. Rappaport,et al.  Wireless Communications: Principles and Practice (2nd Edition) by , 2012 .

[7]  Lars Thiele,et al.  CSI Compression and Feedback for Network MIMO , 2015, 2015 IEEE 81st Vehicular Technology Conference (VTC Spring).

[8]  Wilhelm Keusgen,et al.  A highly flexible digital radio testbed and 60 GHz application examples , 2013, 2013 European Microwave Conference.

[9]  Thomas Wirth,et al.  Wireless Factory Automation: Radio Channel Evolution in Repeated Manufacturing Processes , 2016, WSA.

[10]  Jeffrey G. Andrews,et al.  What Will 5G Be? , 2014, IEEE Journal on Selected Areas in Communications.

[11]  Theodore S. Rappaport,et al.  Wireless communications - principles and practice , 1996 .

[12]  M. Hata,et al.  Empirical formula for propagation loss in land mobile radio services , 1980, IEEE Transactions on Vehicular Technology.

[13]  Per Ängskog,et al.  Challenges and conditions for wireless machine-to-machine communications in industrial environments , 2013, IEEE Communications Magazine.

[14]  Klaus I. Pedersen,et al.  Channel parameter estimation in mobile radio environments using the SAGE algorithm , 1999, IEEE J. Sel. Areas Commun..

[15]  Fredrik Tufvesson,et al.  A Measurement-Based Statistical Model for Industrial Ultra-Wideband Channels , 2007, IEEE Transactions on Wireless Communications.

[16]  Per Ängskog,et al.  Characterisation of highly absorbent and highly reflective radio wave propagation environments in industrial applications , 2012, IET Commun..

[17]  M. V. Clark,et al.  A new path-gain/delay-spread propagation model for digital cellular channels , 1997 .

[18]  Anitha Varghese,et al.  Wireless requirements and challenges in Industry 4.0 , 2014, 2014 International Conference on Contemporary Computing and Informatics (IC3I).

[19]  Javier Ferrer Coll,et al.  Channel Characterization and Wireless Communication Performance in Industrial Environments , 2014 .

[20]  Frank Schaich,et al.  Waveform Contenders for 5G - Suitability for Short Packet and Low Latency Transmissions , 2014, 2014 IEEE 79th Vehicular Technology Conference (VTC Spring).

[21]  J. F. Coll,et al.  Radio-Frequency Electromagnetic Characterization in Factory Infrastructures , 2012, IEEE Transactions on Electromagnetic Compatibility.

[22]  Robert L. Frank,et al.  Polyphase codes with good nonperiodic correlation properties , 1963, IEEE Trans. Inf. Theory.