Detail publikace

On the Evaluation of Clock Synchronization Methods for Networked Control Systems

PACNER, J. RYŠAVÝ, O. ŠVÉDA, M.

Originální název

On the Evaluation of Clock Synchronization Methods for Networked Control Systems

Typ

článek ve sborníku mimo WoS a Scopus

Jazyk

angličtina

Originální abstrakt

A distribute control requires to maintain time synchronization with a degree of precision depending on a  particular application domain. Many large distributed systems employ Ethernet or even full TCP/IP stack for communication. Two prevalent protocols are used for clock synchronization in these networks, in particular, Network Time Protocol (NTP)  and Precise Time Protocol (PTP). In this short paper, we present a method for  practical performance evaluation of clock synchronization within a distributed environment based on the QNX real time operating system. For the measurement we consider nodes  that are assumed to produce synchronous signals. The results of measurement provide a hint on the degree of synchronization that can be practically reached among the set of distributed devices. To be able to perform NTP and PTP  benchmarking, we ported PTPd Unix/Linux implementation to QNX operating system. We prepared an environment to compare NTP and PTP behavior in different network topologies and under different network load characteristic.  The main contribution of this paper is to provide an overview of a method for practical evaluation of synchronization methods for a distributed control system. We present some preliminary results from the measurement. A complete result set may be used, e.g., for defining a performance estimation function in a platform-based design methods.

Klíčová slova

Networked control system (NCS); time synchronization; real-time operating environment; NTP; PTP

Autoři

PACNER, J.; RYŠAVÝ, O.; ŠVÉDA, M.

Rok RIV

2013

Vydáno

28. 8. 2013

Nakladatel

IEEE Computer Society

Místo

New York

ISBN

978-0-7695-3759-7

Kniha

3rd Eastern European Regional Conference on the Engineering of Computer-Based Systems

Strany od

10

Strany do

12

Strany počet

2

URL

https://www.fit.vut.cz/research/publication/10371/

BibTex

@inproceedings{BUT103516,
  author="Jan {Pacner} and Ondřej {Ryšavý} and Miroslav {Švéda}",
  title="On the Evaluation of Clock Synchronization Methods for Networked Control Systems",
  booktitle="3rd Eastern European Regional Conference on the Engineering of Computer-Based Systems",
  year="2013",
  pages="10--12",
  publisher="IEEE Computer Society",
  address="New York",
  isbn="978-0-7695-3759-7",
  url="https://www.fit.vut.cz/research/publication/10371/"
}