Transcript 31008022-tia 921a iperf prelim v1

Telecommunications Industry Association
Arlington, VA
August 16 - 17, 2010
TR-30.3/10-08-022
Document Cover Sheet
Project Number
PN-3-0062-RV2
Document Title
TCP/IP Performance under TIA 921A Impairments
Source
Alcatel-Lucent
Contact
Les J. Wu
Phone: 908-582-4964
Alcatel-Lucent
Fax: 908-582-4964
Email: [email protected]
600 Mountain Avenue
Room 2b-219
Murray Hill, NJ 07974
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The document to which this cover statement is attached is submitted to a Formulating Group or
sub-element thereof of the Telecommunications Industry Association (TIA) in accordance with the
provisions of Sections 6.4.1–6.4.6 inclusive of the TIA Engineering Manual dated October 2009, all
of which provisions are hereby incorporated by reference.
Abstract
Preliminary measurements of TCP performance over the TIA 921A test suite
1 | TIA 30.3 Contribution | August 2010
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TCP/IP Performance
under TIA 921A Impairments
Les Wu
August 2010
Motivation and Caveats
Much video, especially over-the-top video is carried by TCP. Given this, one is
interested in the theoretic performance of TCP under a particular network
condition.
Given this, a set of measurements has been made using “iperf” using an Anue
impairment generator across the TIA 921a impairment suite.
Note:
The results presented here are considered preliminary. There are some
missing test cases and the tests need to be re-run and validated. This
submission will be updated in the future after these runs have been
completed.
3 | TIA 30.3 Contribution | August 2010
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iperf
 http://iperf.sourceforge.net/
 Iperf was developed by NLANR/DAST as a modern alternative for measuring
maximum TCP and UDP bandwidth performance. Iperf allows the tuning of
various parameters and UDP characteristics. Iperf reports bandwidth, delay
jitter, datagram loss.
 Requires both a server as well as client to run
 Sample Output (test case 164A):
-----------------------------------------------------------Client connecting to 135.112.178.21, TCP port 5001
TCP window size: 64.0 KByte (default)
-----------------------------------------------------------[ 3] local 192.168.26.64 port 53032 connected with 135.112.178.21 port 5001
[ ID] Interval
Transfer
Bandwidth
[ 3] 0.0-30.0 sec 24.2 MBytes 6.77 Mbits/sec
4 | TIA 30.3 Contribution | August 2010
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Test Setup
 iperf v2.0.5 server run on a Linux server box
 iperf v2.0.5 client run on a WinXP box
 Anue Systems GEM Network Emulator used to generate impairments
 All interconnections and switch 1GbE
 30s iperf test run:
 iperf -t30 -l 1400 -c <target IP>
 With no impairments, TCP test results on the order of 930-950Mbit.
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iperf Performance Results
6 | TIA 30.3 Contribution | August 2010
*** Preliminary ***
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Iperf Performance Results (detail)
7 | TIA 30.3 Contribution | August 2010
*** Preliminary ***
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TCP Test Result Performance Distribution
 58% of A Profile test cases only support TCP bandwidth below 500kbit
 <7% of A Profile results >2 Mbit
 If these results are confirmed, this suggests the limitatiosn of TIA-921A cases for
practical video transport
8 | TIA 30.3 Contribution | August 2010
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n
Backup Data
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Preliminary Results File
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iperf Performance Results
11 | TIA 30.3 Contribution | August 2010
*** Preliminary ***
All Rights Reserved © Alcatel-Lucent 2010
Iperf Performance Results (detail)
12 | TIA 30.3 Contribution | August 2010
*** Preliminary ***
All Rights Reserved © Alcatel-Lucent 2010