Clock synchronization using correlation events

Patent metadata

Field	Value
Publication number	US-8995472-B2
Application number	US-201414153873-A
Country	US
Kind code	B2
Filing date	Jan 13, 2014
Priority date	Jun 19, 2008
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Two clocks may be synchronized by calculating skew and offset values that may be determined from several correlation events. A correlation event may be the passing of messages in both directions between the two devices. The skew and offset values may be used to determine the time of non-correlated events. The clock synchronization may be performed on a real time basis or may be performed on a post processing basis. One method for calculating the skew and offset may use inequalities within a solution space to refine a solution set with multiple sets of correlation events.

First claim

What is claimed is:

1. At a device, a method implemented on a processor, said method comprising:
identifying one or more correlation events occurring between a first device having a first clock and a second device having a second clock;
determining that a solution set for an expression of the differences between said first clock and said second clock is not bounded, the solution set defining a linear relationship between said first clock and said second clock based on said one o…

Assignees

• Microsoft Corp
• Microsoft Technology Licensing Llc

Inventors

• Haba Erez

Classifications

• H04N21/242

  Electricity · mapped topic

• H04L43/106

  Electricity · mapped topic

• H04J3/0661 Primary

  Electricity · mapped topic

• H04L41/142

  Electricity · mapped topic

• G06F1/12 Primary

  Physics · mapped topic