Method and apparatus to determine the amount of delay in the transfer of data associated with a TCP zero window event or set of TCP zero window events

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EP 2 523 407 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	02.01.2013 Bulletin 2013/01

(43)	Date of publication:
	14.11.2012 Bulletin 2012/46

(21)	Application number: 12167709.0

(22)	Date of filing: 11.05.2012

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International Patent Classification (IPC):

H04L 12/56^(2006.01)

H04L 12/26^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

12.05.2011 US 201113106827

(71)	Applicant: Fluke Corporation Inc.
	Everett, WA 98203 (US)

(72)	Inventors:
	Doug, Roberts McDonough Georgia 30252 (US) Prescott, Dan Elbert, CO 80106 (US) Kosbab, Bruce Colorado Springs, CO 80920 (US) McCanus, Shawn Colorado Springs, CO 80920 (US) Vogt, Robert Colorado Springs, CO 80920 (US) Monk, John Larkspur, CO 80018 (US) O'Brien, Sean Colorado Springs, CO 80962 (US)

(74)	Representative: Klunker . Schmitt-Nilson . Hirsch
	Patentanwälte Destouchesstrasse 68 80796 München 80796 München (DE)

(54)	Method and apparatus to determine the amount of delay in the transfer of data associated with a TCP zero window event or set of TCP zero window events

(57) Network monitoring method and apparatus determines the zero window event data transfer delay, reporting the amount of data transfer delay caused thereby. Non-data-transfer-delaying zero window events can be separated from those causing actual delay, allowing reporting of actual delay events separate from non-delay causing events.