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Telecommunications Industry AssociationTR-30.3/10-08-022 Arlington, VA August 16 - 17, 2010. TCP/IP Performance under TIA 921A Impairments. Les Wu August 2010. Motivation and Caveats. - PowerPoint PPT Presentation
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1 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
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
Alcatel-Lucent
600 Mountain Avenue
Room 2b-219
Murray Hill, NJ 07974
Phone: 908-582-4964
Fax: 908-582-4964 Email: [email protected]
Distribution TR-30.3
For Incorporation Into TIA Publication X For Information
Intended Purpose of Document (Select one) Other (describe) -
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
Telecommunications Industry Association TR-30.3/10-08-022Arlington, VA August 16 - 17, 2010
TCP/IP Performanceunder TIA 921A Impairments
Les Wu
August 2010
3 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 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.
4 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
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 5001TCP 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
5 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
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.
6 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
iperf Performance Results *** Preliminary ***
7 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
Iperf Performance Results (detail)*** Preliminary ***
8 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
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
9 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
n Backup Data
10 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
Preliminary Results File
ser2.zip
11 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
iperf Performance Results *** Preliminary ***
12 | TIA 30.3 Contribution | August 2010 All Rights Reserved © Alcatel-Lucent 2010
Iperf Performance Results (detail)*** Preliminary ***