WO2000029929A1 - Netzwerkteilnehmer - Google Patents
Netzwerkteilnehmer Download PDFInfo
- Publication number
- WO2000029929A1 WO2000029929A1 PCT/DE1999/003509 DE9903509W WO0029929A1 WO 2000029929 A1 WO2000029929 A1 WO 2000029929A1 DE 9903509 W DE9903509 W DE 9903509W WO 0029929 A1 WO0029929 A1 WO 0029929A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- time
- message
- network
- participant
- network participant
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—Synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/28—Timers or timing mechanisms used in protocols
Definitions
- the invention relates to a network participant which can be connected to a further network participant via a message line and to which the further network participant can supply a time-of-day message provided in a reception mode.
- Such a network participant is known from the Siemens catalog ST 70, chapter 12, 1997 edition.
- This network participant is suitable for use in a distributed automation system which comprises several automation components which have to be synchronized in order to control a technical process in accordance with an automation task.
- a time transmitter connected to the network sends out a time message cyclically and by "broadcasting * or" MultiCasting *.
- the automation components synchronize their clocks on the basis of this sent time message. Due to different dwell times of a time-of-day message in the sender of the network subscriber and / or in network components, it can happen that the clock times stored in the time-of-day messages are incorrect at the time of reception.
- German utility model application 298 19 806.1 proposes to provide a network participant with means which, on the one hand, make it possible to delay times from the time of entry in a time message to
- the object of the present invention is to provide a network subscriber of the type mentioned at the beginning with a to create better synchronization accuracy of his time.
- the network participant can be connected to the further network participant via a synchronization line, via which time impulses can be supplied to the network participant by the further network participant, the further network participant simultaneously transmitting a time pulse and a time message to the network participant,
- the network subscriber is provided with means which detect the time difference between the reception time of the time ⁇ pulse and the reception timing of the time message and adapt in accordance with this time difference the time stored in the message time.
- a timer is provided for easy detection of the time difference, which is started by the time pulse and stopped by the time telegram.
- Figure 1 is a schematic diagram of a network
- Figure 2 is a timing diagram of transmission signals.
- 1 is a network, for. B. a so-called
- LAN Local Area Network
- Several network participants 2a, 2b, 2c, ... are connected to this network 1 via one Message line 9a can be connected, each having a receiver 3a, 3b, 3c, ... and a transmitter 4a, 4b, 4c, ...
- a message 5 is to be transmitted to the receiver 3c of the network participant 2c by the transmitter 4a of the network participant 2a.
- the time of a clock 6 of the network participant 2a is stored, which can be synchronized externally by a signal 7, a clock 8 of the network participant 2c being synchronized with the time entered in the time message 5 at a time of entry.
- Synchronization line 9b is provided, via which time pulses can be fed to the receiver 3c of the network participant 2c.
- a network controller 10 or, as shown in the present example, a time pulse transmission unit 11 transmits one at the same time
- Detection and adaptation unit 12 of the receiver 3c a time pulse, e.g. B. a time pulse in the form of a second pulse.
- the network controller 10 of the time pulse transmission unit 11 indicates the time of transmission of the time message via a line 13.
- the time pulse starts a timer of this acquisition and adaptation unit 12, which is stopped by the unit 12 when the time message 5d is received, as a result of which the time difference between the time of reception of the time pulse and the time of reception of the time message 5d is determined.
- the acquisition and adaptation unit 12 finally adapts the time stored in the time message 5d by the unit 12 to the stored placed time added the determined time difference, which causes the times of the transmitter 4a and the receiver 3c are largely synchronized.
- FIG. 2 For clarification of the time adjustment, reference is made below to FIG. 2, in which a time diagram of transmission signals is shown.
- a transmitter S of a network participant sends a time pulse Zi and at the same time a time message Un to receivers E1, E2 from other network participants.
- the time pulse Zi starts in the receivers E1, E2 corresponding timers which are stopped at the time of receiving the time message Un.
- the time of day message Un is less time-delayed when transmitting to the receiver El ( ⁇ tl) than when transmitting to the receiver E2 ( ⁇ t2).
- the time stored in the time message is adjusted by a detection and adaptation unit in the receiver El by the time difference .DELTA.tl and in the receiver E2 by the time difference .DELTA.t2.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Electric Clocks (AREA)
- Computer And Data Communications (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59904348T DE59904348D1 (de) | 1998-11-13 | 1999-11-03 | Netzwerkteilnehmer |
EP99963190A EP1129394B1 (de) | 1998-11-13 | 1999-11-03 | Netzwerkteilnehmer |
AT99963190T ATE232997T1 (de) | 1998-11-13 | 1999-11-03 | Netzwerkteilnehmer |
US09/853,607 US6854019B2 (en) | 1998-11-13 | 2001-05-14 | System uses time pulse that simultaneously transmits with time of day message to synchronize network user stations |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29820339U DE29820339U1 (de) | 1998-11-13 | 1998-11-13 | Netzwerkteilnehmer |
DE29820339.1 | 1998-11-13 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/853,607 Continuation US6854019B2 (en) | 1998-11-13 | 2001-05-14 | System uses time pulse that simultaneously transmits with time of day message to synchronize network user stations |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000029929A1 true WO2000029929A1 (de) | 2000-05-25 |
Family
ID=8065308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/003509 WO2000029929A1 (de) | 1998-11-13 | 1999-11-03 | Netzwerkteilnehmer |
Country Status (6)
Country | Link |
---|---|
US (1) | US6854019B2 (de) |
EP (1) | EP1129394B1 (de) |
AT (1) | ATE232997T1 (de) |
DE (2) | DE29820339U1 (de) |
ES (1) | ES2193772T3 (de) |
WO (1) | WO2000029929A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6968473B2 (en) * | 2001-11-15 | 2005-11-22 | International Business Machines Corporation | Method and apparatus for generating a virtual clock in a data processing system |
US7454648B2 (en) * | 2005-09-09 | 2008-11-18 | International Business Machines Corporation | System and method for calibrating a time of day clock in a computing system node provided in a multi-node network |
US7880861B2 (en) * | 2007-08-17 | 2011-02-01 | Asml Netherlands B.V. | Synchronizing timing of multiple physically or logically separated system nodes |
US7903681B2 (en) * | 2008-06-13 | 2011-03-08 | Alcatel Lucent | Method for distributing a common time reference within a distributed architecture |
US10523408B2 (en) * | 2017-11-29 | 2019-12-31 | Htc Corporation | Communication system and synchoronization method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5884307A (ja) * | 1981-11-16 | 1983-05-20 | Toshiba Mach Co Ltd | プログラマブルシ−ケンスコントロ−ラ |
DE3638947A1 (de) * | 1986-11-14 | 1988-05-26 | Bosch Gmbh Robert | Verfahren zur synchronisation von rechnern eines mehrrechnersystems und mehrrechnersystem |
DE4320137A1 (de) * | 1992-06-19 | 1993-12-23 | Westinghouse Electric Corp | Synchronisation von Tageszeituhren in einem verteilten Verarbeitungsnetzwerksystem |
US5276659A (en) * | 1990-04-16 | 1994-01-04 | Kabushiki Kaisha Toshiba | Clock synchronous system for a network station |
US5580366A (en) * | 1994-04-29 | 1996-12-03 | Owens-Brockway Glass Container Inc. | Automated glassware manufacture controller |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5712867A (en) | 1992-10-15 | 1998-01-27 | Nexus 1994 Limited | Two-way paging apparatus having highly accurate frequency hopping synchronization |
US5428645A (en) * | 1992-11-03 | 1995-06-27 | International Business Machines Corporation | Anonymous time synchronization method |
US5701446A (en) * | 1995-06-09 | 1997-12-23 | International Business Machines Corporation | Method for fine grain adjustments to system time in computer systems |
JPH1013394A (ja) * | 1996-06-21 | 1998-01-16 | Fanuc Ltd | 通信における同期方法 |
US6088591A (en) * | 1996-06-28 | 2000-07-11 | Aironet Wireless Communications, Inc. | Cellular system hand-off protocol |
JP3339786B2 (ja) | 1996-12-02 | 2002-10-28 | オークマ株式会社 | 環状通信路におけるタイマー同期化装置および初期化方法 |
US6587122B1 (en) * | 1998-01-30 | 2003-07-01 | Rockwell Automation Technologies, Inc. | Instruction syntax help information |
US6182197B1 (en) * | 1998-07-10 | 2001-01-30 | International Business Machines Corporation | Real-time shared disk system for computer clusters |
US6725278B1 (en) * | 1998-09-17 | 2004-04-20 | Apple Computer, Inc. | Smart synchronization of computer system time clock based on network connection modes |
US6209106B1 (en) * | 1998-09-30 | 2001-03-27 | International Business Machines Corporation | Method and apparatus for synchronizing selected logical partitions of a partitioned information handling system to an external time reference |
DE29819806U1 (de) | 1998-11-05 | 2000-03-16 | Siemens AG, 80333 München | Netzwerkteilnehmer |
-
1998
- 1998-11-13 DE DE29820339U patent/DE29820339U1/de not_active Expired - Lifetime
-
1999
- 1999-11-03 AT AT99963190T patent/ATE232997T1/de not_active IP Right Cessation
- 1999-11-03 ES ES99963190T patent/ES2193772T3/es not_active Expired - Lifetime
- 1999-11-03 EP EP99963190A patent/EP1129394B1/de not_active Expired - Lifetime
- 1999-11-03 WO PCT/DE1999/003509 patent/WO2000029929A1/de active IP Right Grant
- 1999-11-03 DE DE59904348T patent/DE59904348D1/de not_active Expired - Fee Related
-
2001
- 2001-05-14 US US09/853,607 patent/US6854019B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5884307A (ja) * | 1981-11-16 | 1983-05-20 | Toshiba Mach Co Ltd | プログラマブルシ−ケンスコントロ−ラ |
DE3638947A1 (de) * | 1986-11-14 | 1988-05-26 | Bosch Gmbh Robert | Verfahren zur synchronisation von rechnern eines mehrrechnersystems und mehrrechnersystem |
US5276659A (en) * | 1990-04-16 | 1994-01-04 | Kabushiki Kaisha Toshiba | Clock synchronous system for a network station |
DE4320137A1 (de) * | 1992-06-19 | 1993-12-23 | Westinghouse Electric Corp | Synchronisation von Tageszeituhren in einem verteilten Verarbeitungsnetzwerksystem |
US5580366A (en) * | 1994-04-29 | 1996-12-03 | Owens-Brockway Glass Container Inc. | Automated glassware manufacture controller |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 180 (P - 215) 9 August 1983 (1983-08-09) * |
Also Published As
Publication number | Publication date |
---|---|
DE59904348D1 (de) | 2003-03-27 |
ES2193772T3 (es) | 2003-11-01 |
ATE232997T1 (de) | 2003-03-15 |
EP1129394B1 (de) | 2003-02-19 |
DE29820339U1 (de) | 2000-01-20 |
US20020000919A1 (en) | 2002-01-03 |
US6854019B2 (en) | 2005-02-08 |
EP1129394A1 (de) | 2001-09-05 |
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