CA2424654A1 - Systems and methods for robust, real-time measurement of network performance - Google Patents

Systems and methods for robust, real-time measurement of network performance Download PDF

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Publication number
CA2424654A1
CA2424654A1 CA002424654A CA2424654A CA2424654A1 CA 2424654 A1 CA2424654 A1 CA 2424654A1 CA 002424654 A CA002424654 A CA 002424654A CA 2424654 A CA2424654 A CA 2424654A CA 2424654 A1 CA2424654 A1 CA 2424654A1
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Canada
Prior art keywords
internetwork
web
server
terminal
web page
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Granted
Application number
CA002424654A
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French (fr)
Other versions
CA2424654C (en
Inventor
Michael A. Lloyd
Sean P. Finn
Omar C. Baldonado
Mansour J. Karam
Faisal Siddiqi
James G. Mcguire
Herbert S. Madan
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Avaya Technology LLC
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Individual
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Publication of CA2424654A1 publication Critical patent/CA2424654A1/en
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Publication of CA2424654C publication Critical patent/CA2424654C/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H04L41/5009—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/14—Network analysis or design
    • H04L41/142—Network analysis or design using statistical or mathematical methods
    • 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
    • H04L43/0829—Packet loss
    • 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
    • H04L43/0852—Delays
    • H04L43/0858—One way delays
    • 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
    • H04L43/0852—Delays
    • H04L43/0864—Round trip delays
    • 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
    • H04L43/0852—Delays
    • H04L43/087—Jitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/11—Identifying congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/20—Traffic policing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/28—Flow control; Congestion control in relation to timing considerations
    • H04L47/283—Flow control; Congestion control in relation to timing considerations in response to processing delays, e.g. caused by jitter or round trip time [RTT]

Abstract

Methods and apparatuses for obtaining delay, jitter, and loss statistics of a path between server and an end user coupled via an internetwork are describe d. The serve may comprise a web server in communication with the end user via t he Internet. Statistics are obtained by analyzing the details of a TCP connecti on underlying an HTML transaction. Robust measurements of jitter, delay, and lo ss are ensured by maximizing traffic between the web server and the surfer in order to generate a robust sample of TCP connections. Content may be updated with one or more html link(s). This existing content may reside on a highly trafficked portal, such as a web portal, and may be encoded in a markup language, such as Hyper Text Markup Language (HTML). The Uniform Resource Locators (URLs) corresponding to the one or more links resolve to the server from which the statistics are to be measured. The actual content supplied by the server may be minimized, in order to preserve bandwidth.

Claims (17)

1. A method of measuring a performance of a route in an internetwork, the route coupling an internetwork server to a terminal on the internetwork, the method comprising:
at a frequently trafficked portal on the internetwork, detecting a request for a web page from the terminal, wherein the web page is at least partially stored at the frequently trafficked portal;
in response to the request for the web page, downloading the web page to the terminal via the internetwork;
from the web page, retrieving a Uniform Resource Locator (URL) for a web object referenced in the web page;
resolving the URL to the internetwork server;
defecting a request for the web object from the terminal at the internetwork server;
in response to the request for the web object, sending the web object from the internetwork server to the terminal; and concurrent with sending the web object, measuring a Round Trip Time (RTT) of one or more packets sent between the internetwork server and the terminal.
2. The method of claim 1, wherein the web page is at least partially encoded in a markup language.
3. The method of claim 2, wherein the markup language is Hyper Text Markup Language.
4. The method of claim 3, wherein the sending the web object from the internetwork server to the terminal is performed via a Hyper Text Transfer Protocol (HTTP).
5. The method of claim 4, wherein the Hyper Text Transfer Protocol is HTTP v 1Ø
6. The method of claim 4, wherein the Hyper Text Transfer Protocol is HTTP v 1.1.
7. The method of claim 1, wherein the web object is visually imperceptible.
8. The method of claim 1, wherein the web object comprises a single pixel.
9. A method of measuring performance in a network, the method comprising:
between a first point in the network and a second point in the network, wherein the first point is identified by a first address and the second point is identified by a second address, generating one or more pairs of packets, each of the one or more pairs of packets including:
a packet sent from the first point to the second point; and a packet received at the second point from the first point, wherein the received packet comprises a response to the sent packet;
measuring a plurality of durations between the sent packets and the received packets for the one or more pairs; and calculating, at least from the plurality of durations, parameters of at least part of the network, wherein the parameters comprise per-group delay, fitter, and loss.
10. The method of claim 9, wherein the pairs of packets comprise messages in Transmission Control Protocol (TCP) format.
11. The method of claim 10, wherein one or more of the sent packets is a SYN/ACK packet.
12. The method of claim 10, wherein one or more of the received packets is an ACK packet.
13. The method of claim 9, wherein the network is an internetwork.
14. A system for measuring performance of an internetwork, the system comprising:
a frequently trafficked web portal in the internetwork;
a web page at least partially stored on the frequently trafficked web portal, the at least partially stored web portal including a Uniform Resource Locator (URL) for a web object, such that the web object is not stored on the frequently trafficked web portal;
a Domain Name System (DNS) server on the internetwork; the DNS server including a reference which maps the URL for the web object to an Internet Protocol address for an internetwork server on the internetwork;
a web browser coupled to the internetwork, wherein the web browser sends a download request for the web object to the internetwork server; and a measurement process executed on the internetwork server, such that in response to the download request, the measurement process measures one or more Round Trip Times between the internetwork server and the web browser.
15. The system of claim 14, wherein the web page is at least partially encoded in a markup language.
16. The system of claim 14, wherein the markup language is Hyper Text Markup Language (HTML).
17. A method of measuring a performance of a route in an internetwork, the route coupling an internetwork server to a terminal on the internetwork, the method comprising:
at a frequently trafficked portal on the internetwork, detecting a request for a web page from the terminal, wherein the web page is at least partially stored at the frequently trafficked portal;
from the web page, retrieving a Uniform Resource Locator (URL) for a web object referenced in the web page;
resolving the URL to the internetwork server;

detecting a request for the web object from the terminal at the internetwork server; and in response to the request for the web object, measuring a Round Trip Time (RTT) of one or more packets sent between the internetwork server and the terminal.
CA2424654A 2000-10-17 2001-10-04 Systems and methods for robust, real-time measurement of network performance Expired - Fee Related CA2424654C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US24145000P 2000-10-17 2000-10-17
US60/241,450 2000-10-17
US27520601P 2001-03-12 2001-03-12
US60/275,206 2001-03-12
US09/903,423 US7363367B2 (en) 2000-10-17 2001-07-10 Systems and methods for robust, real-time measurement of network performance
US09/903,423 2001-07-10
PCT/US2001/031420 WO2002033892A2 (en) 2000-10-17 2001-10-04 Systems and methods for robust, real-time measurement of network performance

Publications (2)

Publication Number Publication Date
CA2424654A1 true CA2424654A1 (en) 2002-04-25
CA2424654C CA2424654C (en) 2010-07-06

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CA2424654A Expired - Fee Related CA2424654C (en) 2000-10-17 2001-10-04 Systems and methods for robust, real-time measurement of network performance

Country Status (8)

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US (1) US7363367B2 (en)
EP (1) EP1327324B1 (en)
AT (1) ATE336124T1 (en)
AU (1) AU2002211519A1 (en)
CA (1) CA2424654C (en)
DE (1) DE60122190T2 (en)
IL (2) IL155354A0 (en)
WO (1) WO2002033892A2 (en)

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US7363367B2 (en) 2008-04-22
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IL155354A0 (en) 2003-11-23

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