WO1997027685A3 - Packet network monitoring device - Google Patents

Packet network monitoring device Download PDF

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Publication number
WO1997027685A3
WO1997027685A3 PCT/US1997/001484 US9701484W WO9727685A3 WO 1997027685 A3 WO1997027685 A3 WO 1997027685A3 US 9701484 W US9701484 W US 9701484W WO 9727685 A3 WO9727685 A3 WO 9727685A3
Authority
WO
WIPO (PCT)
Prior art keywords
network
digitizer
tdr
cabling
disclosed
Prior art date
Application number
PCT/US1997/001484
Other languages
French (fr)
Other versions
WO1997027685A2 (en
Inventor
William M Richardson Iii
Leslie H Swanson
Ashwin Kovummai
Sandeepan Mukherjee
Original Assignee
Lecroy Corp
William M Richardson Iii
Leslie H Swanson
Ashwin Kovummai
Sandeepan Mukherjee
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lecroy Corp, William M Richardson Iii, Leslie H Swanson, Ashwin Kovummai, Sandeepan Mukherjee filed Critical Lecroy Corp
Priority to EP97904093A priority Critical patent/EP0878078A2/en
Priority to JP9527111A priority patent/JP2000505604A/en
Priority to AU18477/97A priority patent/AU715525B2/en
Publication of WO1997027685A2 publication Critical patent/WO1997027685A2/en
Publication of WO1997027685A3 publication Critical patent/WO1997027685A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/18—Protocol analysers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/02—Capturing of monitoring data
    • H04L43/022—Capturing of monitoring data by sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • H04L43/0847—Transmission error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/12—Network monitoring probes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring

Abstract

A network diagnostic device is disclosed that digitally samples the voltages on the cabling of the network (10), but does so at a much higher rate and with greater resolution than is required to minimally detect digital transmissions on the cabling. This sampling provides information on the analog characteristics of digital, noise, and interference signals on the network. Thus, network problems can be precisely diagnosed. The device includes a fast digitizer (120) with a long memory (128a, 128b) and a system processor (140) that statistically analyzes the signal events captured by the digitizer (120). The invention is also capable of performing time domain reflectometry (TDR) analysis of a functioning network. This is accomplished by placing (150) a TDR signal on the network surrounded by a transmission that the network devices will interpret as a broadcast diagnostic packet. This will cause the network nodes to ignore the transmission. The digitizer, however, is able to detect the networks' response to the TDR signal. Methods for identifying unknown network sources and Manchester decoding are also disclosed.
PCT/US1997/001484 1996-01-29 1997-01-28 Packet network monitoring device WO1997027685A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP97904093A EP0878078A2 (en) 1996-01-29 1997-01-28 Packet network monitoring device
JP9527111A JP2000505604A (en) 1996-01-29 1997-01-28 Packet network monitor
AU18477/97A AU715525B2 (en) 1996-01-29 1997-01-28 Packet network monitoring device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1071996P 1996-01-29 1996-01-29
US60/010,719 1996-01-29
US61993496A 1996-03-18 1996-03-18
US08/619,934 1996-03-18

Publications (2)

Publication Number Publication Date
WO1997027685A2 WO1997027685A2 (en) 1997-07-31
WO1997027685A3 true WO1997027685A3 (en) 1997-12-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/001484 WO1997027685A2 (en) 1996-01-29 1997-01-28 Packet network monitoring device

Country Status (6)

Country Link
US (4) US6795402B1 (en)
EP (1) EP0878078A2 (en)
JP (1) JP2000505604A (en)
AU (1) AU715525B2 (en)
CA (1) CA2244724A1 (en)
WO (1) WO1997027685A2 (en)

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Also Published As

Publication number Publication date
EP0878078A2 (en) 1998-11-18
AU715525B2 (en) 2000-02-03
US7362714B2 (en) 2008-04-22
WO1997027685A2 (en) 1997-07-31
JP2000505604A (en) 2000-05-09
US8811186B2 (en) 2014-08-19
CA2244724A1 (en) 1997-07-31
US6795402B1 (en) 2004-09-21
US20080225745A1 (en) 2008-09-18
AU1847797A (en) 1997-08-20
US20140254417A1 (en) 2014-09-11
US20050058076A1 (en) 2005-03-17

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