Time synchronizing method and apparatus based on time stamp

Details Time synchronizing method and apparatus based on time stamp Time synchronizing method and apparatus based on time stamp

2006-07-17

2010-02-23

Sheikh, Ayaz R (Department: 2419)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S395620, C370S503000

Reexamination Certificate

active

07668151

ABSTRACT:
Provided are a time synchronizing method and apparatus based on a time stamp. The time synchronizing method includes: transmitting a local time stamp based on a free-running local clock to a master node; receiving a response time stamp from the master node; calculating a delta time value based on the response time stamp; filtering the delta-time using a digital low pass filter running at the free-running local clock rate; and adjusting a local clock time based on the filtered delta time value.

REFERENCES:
patent: 6418150 (2002-07-01), Staats
patent: 6621832 (2003-09-01), Staats
patent: 2001/0038674 (2001-11-01), Trans
patent: 2002/0041607 (2002-04-01), Spalink
patent: 2004/0109498 (2004-06-01), Miller et al.

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