Bibliographic data

Document EP000002306674A1 (Pages: 13)

Bibliographic data Document EP000002306674A1 (Pages: 13)
INID Criterion Field Contents
54 Title TI [DE] Verzögerungsasymmetrieüberwachung für Zweirichtungszeitprotokolle
[EN] Delay asymmetry monitoring for 2-way time protocols
[FR] Surveillance de l'asymmétrie de délai pour protocole temporel bidirectionel
71/73 Applicant/owner PA ALCATEL LUCENT, FR
72 Inventor IN BUI DINH THAI, FR ; LE PALLEC MICHEL, FR ; LE SAUZE NICOLAS, FR
22/96 Application date AD Sep 30, 2009
21 Application number AN 09305922
Country of application AC EP
Publication date PUB Apr 6, 2011
33
31
32		 Priority data PRC
PRN
PRD

51 IPC main class ICM H04L 12/26 (2006.01)
51 IPC secondary class ICS
IPC additional class ICA
IPC index class ICI
Cooperative patent classification CPC H04L 43/0864
MCD main class MCM H04L 12/26 (2006.01)
MCD secondary class MCS
MCD additional class MCA
57 Abstract AB [EN] A delay asymmetry minimizing method is disclosed for providing generally symmetrical delays for timing packets traversing a network node. The delay asymmetry minimizing method includes ensuring that a first timing packet traversing a network node in one direction will traverse the same set of port buffers which a second timing packet traversing the same network node in the opposite direction will traverse resulting in an effective cancellation of delay asymmetry. First and second timing packets are presumed to be traversing a reverse tunneling connection. The delay asymmetry minimizing method is particularly useful for overcoming the need for auxiliary timing equipment of delay asymmetry methods known in the art.
56 Cited documents identified in the search CT
56 Cited documents indicated by the applicant CT
56 Cited non-patent literature identified in the search CTNP ANONYMOUS ED - ANONYMOUS: "IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems; IEEE Std 1588-2008 (Revision of IEEE Std 1588-2002)", IEEE STANDARD; [IEEE STANDARD], IEEE, PISCATAWAY, NJ, USA, 24 July 2008 (2008-07-24), pages c1 - 269, XP017601899, ISBN: 978-0-7381-5400-8 0;
BISIO I ET AL: "Analysis of the TCP round trip time over asymmetric DVB-RCS systems", GLOBAL TELECOMMUNICATIONS CONFERENCE, 2005. GLOBECOM '05. IEEE ST. LOIUS, MO, USA 28 NOV.-2 DEC. 2005, PISCATAWAY, NJ, USA,IEEE, vol. 6, 28 November 2005 (2005-11-28), pages 3248 - 3252, XP010882713, ISBN: 978-0-7803-9414-8 0;
DAVID L MILLS UNIVERSITY OF DELAWARE: "Network Time Protocol (Version 3) Specification, Implementation and Analysis; rfc1305.txt", IETF STANDARD, INTERNET ENGINEERING TASK FORCE, IETF, CH, 1 March 1992 (1992-03-01), XP015007092, ISSN: 0000-0003 0;
KITAGUCHI Y ET AL: "Research of advanced time synchronous system with network support", 2003 IEEE PACIFIC RIM CONFERENCE ON COMMUNICATIONS, COMPUTERS AND SIGNAL PROCESSING. (PACRIM 2003). VICTORIA, BC, CANADA, AUG. 28 - 30, 2003; [IEEE PACIFIC RIM CONFERENCE ON COMMUNICATIONS, COMPUTERS AND SIGNAL PROCESSING. PACRIM], NEW YORK, NY : IEE, vol. 2, 28 August 2003 (2003-08-28), pages 1036 - 1039, XP010660494, ISBN: 978-0-7803-7978-7 0
56 Cited non-patent literature indicated by the applicant CTNP
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