IEEE 1588

IEEE 1588

Das Precision Time Protocol (PTP) ist ein Protokoll, das die Synchronität der Uhrzeiteinstellungen mehrerer Geräte in einem Netzwerk bewirkt. Anders als bei dem Network Time Protocol (NTP), definiert in RFC 958, liegt der Fokus von PTP, definiert in IEEE 1588, auf höherer Genauigkeit und lokal begrenzten Netzwerken. PTP kann in Hardware-Ausführung eine Genauigkeit im Bereich von Nanosekunden und in Software-Ausführung im Bereich weniger Mikrosekunden erzielen.

Funktionsweise: Von den teilnehmenden Geräten wird über den Best Master Clock (BMC) Algorithmus dasjenige ermittelt, das angibt, die exakteste Zeit zu haben. Anschließend wird von diesem Gerät (Grandmaster Clock) die Zeit an die anderen Geräte (Slave Clocks) verteilt, wobei die Signallaufzeiten kompensiert werden. Die Kompensation stützt sich auf die Annahme, in dem Netzwerk habe der Hin- und Rückweg von Synchronisierungsnachrichten, über mehrere Schritte gemittelt, die gleiche Laufzeit.

Literatur

  • The Institute of Electrical and Electronics Engineers, Inc. (Hrsg.): IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems. IEEE Std. 1588 - 2002. New York November 2002, ISBN 0-7381-3369-8. 
  • IEC 61588: Precision clock synchronization protocol for networked measurement and control systems. 2004 (engl.)
  • John C. Eidson, Measurement, Control and Communication Using IEEE 1588, (Springer-Verlag London Limited 2006) (engl.)

Weblinks


Wikimedia Foundation.

Игры ⚽ Поможем сделать НИР

Schlagen Sie auch in anderen Wörterbüchern nach:

  • IEEE Standards Association — The Institute of Electrical and Electronics Engineers Standards Association (IEEE SA) is a leading developer of global industry standards in a broad range of industries, including:* Power and Energy * Biomedical and Healthcare * Information… …   Wikipedia

  • IEEE 802.11n-2009 — is an amendment to the IEEE 802.11 2007 wireless networking standard to improve network throughput over the two previous standards 802.11a and 802.11g with a significant increase in the maximum net data rate from 54 Mbit/s to 600 Mbit/s (slightly …   Wikipedia

  • IEEE 802.2 — is the IEEE 802 standard defining Logical Link Control (LLC), which is the upper portion of the data link layer of the OSI Model. The LLC sublayer presents a uniform interface to the user of the data link service, usually the network layer.… …   Wikipedia

  • IEEE 802.1Q — is the networking standard that supports Virtual LANs (VLANs) on an Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames.… …   Wikipedia

  • IEEE P1363 — is an Institute of Electrical and Electronics Engineers (IEEE) standardization project for public key cryptography. It includes specifications for: Traditional public key cryptography (IEEE Std 1363 2000 and 1363a 2004) Lattice based public key… …   Wikipedia

  • IEEE P1619 — is an Institute of Electrical and Electronics Engineers (IEEE) standardization project for encryption of stored data, but more generically refers to the work of the IEEE P1619 Security in Storage Working Group (SISWG), which includes a family of… …   Wikipedia

  • IEEE 1394 — Firewire redirects here. For other uses, see Firewire (disambiguation). IEEE 1394 Interface Type Serial Production history Designer …   Wikipedia

  • IEEE 802.20 — A 2008 Kyocera desktop wireless modem for IEEE 802.20 provides an Ethernet interface IEEE 802.20 or Mobile Broadband Wireless Access (MBWA) was a specification by the standard association of the Institute of Electrical and Electronics Engineers… …   Wikipedia

  • IEEE 1284 — For a history of the Centronics interface, see Centronics. IEEE 1284 is a standard that defines bi directional parallel communications between computers and other devices. An IEEE 1284 36 pin male Centronics printer cable connection. Contents …   Wikipedia

  • IEEE 1901 — The IEEE 1901 working group of the Institute of Electrical and Electronics Engineers develops standards for high speed power line communications. This technology allows computer networks to send data over electrical power lines (contrasting with… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”