Synchronization of network nodes

Multiplex communications – Communication over free space – Repeater

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C370S350000

Reexamination Certificate

active

07990909

ABSTRACT:
A method and apparatus are provided to achieve frequency synchronization between a first clock at a first node and a second clock at a second node of a packet-carrying communications network. At the first node: a property of packet transmission through the network between the first node and the second node is measured; and the measurement of the property is sent to the second node. At the second node, the same property of packet transmission through the network between the first node and the second node is measured. The measurement of the property made at the first node and the measurement of the property made at the second node are used to synchronize the frequency of the second clock with respect to the first clock.

REFERENCES:
patent: 5640388 (1997-06-01), Woodhead et al.
patent: 5872774 (1999-02-01), Wheatley et al.
patent: 6012096 (2000-01-01), Link et al.
patent: 6072809 (2000-06-01), Agrawal et al.
patent: 6577648 (2003-06-01), Raisanen et al.
patent: 6771629 (2004-08-01), Preston et al.
patent: 6920155 (2005-07-01), Rao
patent: 7787438 (2010-08-01), Dowse
patent: 2001/0037409 (2001-11-01), Ricciulli
patent: 2003/0115321 (2003-06-01), Edmison et al.
patent: 2004/0109519 (2004-06-01), Mizukami et al.
patent: 2005/0152330 (2005-07-01), Stephens et al.
patent: 2005/0232384 (2005-10-01), Heid et al.
patent: 2006/0034196 (2006-02-01), Casey
patent: 2007/0127919 (2007-06-01), Kallstenius
patent: 2009/0059962 (2009-03-01), Schmidt et al.
patent: 1239620 (2002-09-01), None
Kannisto et al., “Precision Time Protocol Prototype on Wireless LAN,” Telecommunications and Networking—ICT 2004; [Lecture notes in Computer Science; LNCS]; Springer-Verlag, Berlin/Heidelberg, vol. 3124, pp. 1236-1245 (Jul. 17, 2004), XP019009251, ISBN: 978-3-540-22571-3.
Fasbender et al., “On Assessing Unidirectional Latencies in Packet-Switched Networks,” Communications, 1997, ICC '97 Montreal, Towards the Knowledge Millennium, 1997 IEEE International Conference on Montreal, Quebec, Canada (Jun. 8-12, 1997), NY, NY USA, IEEE, US vol. 1, pp. 490-494 (Jun. 8, 1997), XP010227065, ISBN: 978-0-7803-3925-5.
International Search Report and Written Opinion dated Dec. 30, 2008 for International Application No. PCT/EP2008/064833, International Filing Date Oct. 31, 2008 (19 pages).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Synchronization of network nodes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synchronization of network nodes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronization of network nodes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2796907

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.