DE3377817D1 - Synchronization of real-time clocks in a packet switching system - Google Patents

Synchronization of real-time clocks in a packet switching system

Info

Publication number
DE3377817D1
DE3377817D1 DE8383903127T DE3377817T DE3377817D1 DE 3377817 D1 DE3377817 D1 DE 3377817D1 DE 8383903127 T DE8383903127 T DE 8383903127T DE 3377817 T DE3377817 T DE 3377817T DE 3377817 D1 DE3377817 D1 DE 3377817D1
Authority
DE
Germany
Prior art keywords
synchronization
real
switching system
packet switching
time clocks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8383903127T
Other languages
English (en)
Inventor
Gary Crockett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Application granted granted Critical
Publication of DE3377817D1 publication Critical patent/DE3377817D1/de
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/14—Time supervision arrangements, e.g. real time clock
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G7/00—Synchronisation
    • G04G7/02—Synchronisation by radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
    • H04J3/0697—Synchronisation in a packet node

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
DE8383903127T 1983-07-08 1983-09-02 Synchronization of real-time clocks in a packet switching system Expired DE3377817D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/512,209 US4530091A (en) 1983-07-08 1983-07-08 Synchronization of real-time clocks in a packet switching system
PCT/US1983/001338 WO1985000441A1 (en) 1983-07-08 1983-09-02 Synchronization of real-time clocks in a packet switching system

Publications (1)

Publication Number Publication Date
DE3377817D1 true DE3377817D1 (en) 1988-09-29

Family

ID=24038151

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383903127T Expired DE3377817D1 (en) 1983-07-08 1983-09-02 Synchronization of real-time clocks in a packet switching system

Country Status (6)

Country Link
US (1) US4530091A (de)
EP (1) EP0148179B1 (de)
JP (1) JPS61500093A (de)
CA (1) CA1211850A (de)
DE (1) DE3377817D1 (de)
WO (1) WO1985000441A1 (de)

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US5774377A (en) * 1991-07-30 1998-06-30 Hewlett-Packard Company Method and apparatus for monitoring a subsystem within a distributed system for providing an archive of events within a certain time of a trap condition
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EP0703514B1 (de) 1994-09-24 1998-07-22 Eta SA Fabriques d'Ebauches Zeitmessung in einem Kommunikationssystem, Kommunikationssystem und Empfänger dafür
US5659542A (en) 1995-03-03 1997-08-19 Intecom, Inc. System and method for signalling and call processing for private and hybrid communications systems including multimedia systems
US6259677B1 (en) * 1998-09-30 2001-07-10 Cisco Technology, Inc. Clock synchronization and dynamic jitter management for voice over IP and real-time data
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US6429785B1 (en) 1999-01-08 2002-08-06 Siemens Power Transmission & Distribution Inc. Revenue meter having precision time clock
CN1166249C (zh) * 1999-01-19 2004-09-08 西门子公司 计算机网络的时间同步方法和具有时间同步的计算机网络
DE19914355A1 (de) * 1999-03-30 2000-10-05 Wolfgang Schaefer Verfahren zur Synchronisation von Entfernten Uhren über Satellit an eine Zentrale Uhr
US6529983B1 (en) 1999-11-03 2003-03-04 Cisco Technology, Inc. Group and virtual locking mechanism for inter processor synchronization
US6910019B2 (en) * 2000-01-26 2005-06-21 Robert C. Dorr Countdown on-line auction clock
US6778493B1 (en) 2000-02-07 2004-08-17 Sharp Laboratories Of America, Inc. Real-time media content synchronization and transmission in packet network apparatus and method
AT5327U1 (de) * 2000-03-06 2002-05-27 Keroe Nikolaus Dipl Ing Verfahren zum synchronisieren von computeruhren in netzwerken für die informationsübertragung, einrichtung zur durchführung dieses verfahrens sowie für die synchronisation von computeruhren geeignetes datenpaket
US6892237B1 (en) * 2000-03-28 2005-05-10 Cisco Technology, Inc. Method and apparatus for high-speed parsing of network messages
US6505269B1 (en) 2000-05-16 2003-01-07 Cisco Technology, Inc. Dynamic addressing mapping to eliminate memory resource contention in a symmetric multiprocessor system
GB2364203B (en) * 2000-06-27 2004-03-17 Nokia Mobile Phones Ltd Synchronisation
US6898212B1 (en) * 2000-11-14 2005-05-24 Telefonaktiebolaget Lm Ericsson (Publ) Systems and methods for controlling audible speech distortion in a GPS-based CDMA wireless network using ATM transport
US6859742B2 (en) 2001-07-12 2005-02-22 Landis+Gyr Inc. Redundant precision time keeping for utility meters
US7385990B2 (en) * 2003-07-21 2008-06-10 Zarlink Semiconductor Inc. Method to improve the resolution of time measurements and alignment in packet networks by time modulation
US11294618B2 (en) 2003-07-28 2022-04-05 Sonos, Inc. Media player system
US11106424B2 (en) 2003-07-28 2021-08-31 Sonos, Inc. Synchronizing operations among a plurality of independently clocked digital data processing devices
US11106425B2 (en) 2003-07-28 2021-08-31 Sonos, Inc. Synchronizing operations among a plurality of independently clocked digital data processing devices
US10613817B2 (en) 2003-07-28 2020-04-07 Sonos, Inc. Method and apparatus for displaying a list of tracks scheduled for playback by a synchrony group
US8234395B2 (en) 2003-07-28 2012-07-31 Sonos, Inc. System and method for synchronizing operations among a plurality of independently clocked digital data processing devices
US8290603B1 (en) 2004-06-05 2012-10-16 Sonos, Inc. User interfaces for controlling and manipulating groupings in a multi-zone media system
US8086752B2 (en) 2006-11-22 2011-12-27 Sonos, Inc. Systems and methods for synchronizing operations among a plurality of independently clocked digital data processing devices that independently source digital data
US11650784B2 (en) 2003-07-28 2023-05-16 Sonos, Inc. Adjusting volume levels
US9977561B2 (en) 2004-04-01 2018-05-22 Sonos, Inc. Systems, methods, apparatus, and articles of manufacture to provide guest access
US8024055B1 (en) 2004-05-15 2011-09-20 Sonos, Inc. Method and system for controlling amplifiers
US8868698B2 (en) 2004-06-05 2014-10-21 Sonos, Inc. Establishing a secure wireless network with minimum human intervention
US8326951B1 (en) 2004-06-05 2012-12-04 Sonos, Inc. Establishing a secure wireless network with minimum human intervention
US20060171310A1 (en) * 2005-02-03 2006-08-03 Utstarcom, Inc. Method and system of consolidating mobile IP messages within a network
US20080065925A1 (en) * 2006-09-08 2008-03-13 Oliverio James C System and methods for synchronizing performances of geographically-disparate performers
US8483853B1 (en) 2006-09-12 2013-07-09 Sonos, Inc. Controlling and manipulating groupings in a multi-zone media system
US8788080B1 (en) 2006-09-12 2014-07-22 Sonos, Inc. Multi-channel pairing in a media system
US9202509B2 (en) 2006-09-12 2015-12-01 Sonos, Inc. Controlling and grouping in a multi-zone media system
US8036247B2 (en) 2007-01-05 2011-10-11 Frank Paul R System and method of synchronizing real time clock values in arbitrary distributed systems
US20090307610A1 (en) * 2008-06-10 2009-12-10 Melonie Elizabeth Ryan Method for a plurality of users to be simultaneously matched to interact one on one in a live controlled environment
US11265652B2 (en) 2011-01-25 2022-03-01 Sonos, Inc. Playback device pairing
US11429343B2 (en) 2011-01-25 2022-08-30 Sonos, Inc. Stereo playback configuration and control
US8938312B2 (en) 2011-04-18 2015-01-20 Sonos, Inc. Smart line-in processing
US9042556B2 (en) 2011-07-19 2015-05-26 Sonos, Inc Shaping sound responsive to speaker orientation
US9729115B2 (en) 2012-04-27 2017-08-08 Sonos, Inc. Intelligently increasing the sound level of player
US9008330B2 (en) 2012-09-28 2015-04-14 Sonos, Inc. Crossover frequency adjustments for audio speakers
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US9226073B2 (en) 2014-02-06 2015-12-29 Sonos, Inc. Audio output balancing during synchronized playback
US9226087B2 (en) 2014-02-06 2015-12-29 Sonos, Inc. Audio output balancing during synchronized playback
US10248376B2 (en) 2015-06-11 2019-04-02 Sonos, Inc. Multiple groupings in a playback system
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GB1577331A (en) * 1976-06-19 1980-10-22 Plessey Co Ltd Synchronisation arrangements for digital switching centres
US4142069A (en) * 1977-06-20 1979-02-27 The United States Of America As Represented By The Secretary Of The Army Time reference distribution technique
JPS594900B2 (ja) * 1979-09-03 1984-02-01 日本電気株式会社 クロック再生回路
DE3015234C2 (de) * 1980-04-21 1986-07-03 Siemens AG, 1000 Berlin und 8000 München Verfahren zur Übertragung eines Signals
JPS57104883A (en) * 1980-12-22 1982-06-30 Fujitsu Ltd Time controlling system

Also Published As

Publication number Publication date
JPS61500093A (ja) 1986-01-16
EP0148179A1 (de) 1985-07-17
EP0148179B1 (de) 1988-08-24
US4530091A (en) 1985-07-16
CA1211850A (en) 1986-09-23
WO1985000441A1 (en) 1985-01-31

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: BLUMBACH, KRAMER & PARTNER, 65193 WIESBADEN

8339 Ceased/non-payment of the annual fee