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Synchronization method and arrangement

  • US 6,532,274 B1
  • Filed: 01/11/2000
  • Issued: 03/11/2003
  • Est. Priority Date: 01/12/1999
  • Status: Expired due to Term
First Claim
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1. A method of synchronizing at least one local oscillator with a central time-generating unit, where said local oscillator serves an element included in a network, and where said time-generating unit is included in a main unit which is also included in said network, comprising the steps of:

  • controlling the frequency of said local oscillator by periodic and automatic calibration, wherein the time-generating unit sends a time stamp at pre-defined time intervals;

    evaluating the transmission time of said time stamp from said main unit to a respective element with a given degree of certainty by evaluating against well defined physical requirements of that part of said network including said main unit and said elements, and wherein the network is a delimited network; and

    , using the inter-arrival time of the time stamps to calibrate the local oscillator together with a known transmission time, wherein said transmission time is evaluated with necessary certainty by giving said time stamps the highest priority over all other information transmissions within said delimited network.

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