Bug 2406 – Poor 802.11g performance in ad-hoc mode

Bug 2406 - Poor 802.11g performance in ad-hoc mode


Summary:	Poor 802.11g performance in ad-hoc mode

Status:	RESOLVED FIXED

Product:	ns-3
Classification:	Unclassified
Component:	wifi
Version:	ns-3.25
Hardware:	All All

Importance:	P5 normal
Assigned To:	sebastien.deronne

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2016-05-08 11:49 UTC by sebastien.deronne
Modified:	2016-05-13 05:32 UTC (History)
CC List:	2 users (show)

See Also:

Attachments
output of ideal-wifi-manager-example (22.18 KB, application/postscript) 2016-05-08 11:49 UTC, sebastien.deronne	Details
output of ideal-wifi-manager-example (22.18 KB, application/postscript) 2016-05-08 11:51 UTC, sebastien.deronne	Details
proposed patch to fix (3.74 KB, patch) 2016-05-08 11:56 UTC, sebastien.deronne	Details \| Diff
output of ideal-wifi-manager-example with the fix (22.18 KB, application/postscript) 2016-05-08 11:58 UTC, sebastien.deronne	Details
Show Obsolete (1) Add an attachment (proposed patch, testcase, etc.)

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Description sebastien.deronne 2016-05-08 11:49:27 UTC

Created attachment 2418 [details]
output of ideal-wifi-manager-example

It has been noticed that 802.11g performance is rather poor in our latest release.
Investigation show this only occur in ad-hoc mode. 

Running ideal-wifi-manager-example with 802.11g standard shows we barely reach 10 Mbit/s for higher SNRs. I provide output graph in attachment.

Commands to reproduce:
./waf --run "ideal-wifi-manager-example --standard=802.11g"
gnuplot ideal-wifi-manager-example-802.11g.plt

Comment 1 sebastien.deronne 2016-05-08 11:51:26 UTC

Created attachment 2419 [details]
output of ideal-wifi-manager-example

wrong attachment provided

Comment 2 sebastien.deronne 2016-05-08 11:56:24 UTC

Created attachment 2420 [details]
proposed patch to fix

The problem is that we forgot to add the Basic modes when calling AddAllSupportedModes.

Comment 3 sebastien.deronne 2016-05-08 11:58:03 UTC

Created attachment 2421 [details]
output of ideal-wifi-manager-example with the fix

When applying the patch, we can now reach around 20 Mbit/s at the higher SNRs.

Comment 4 Tom Henderson 2016-05-09 12:33:24 UTC

+1; thanks for fixing

Comment 5 sebastien.deronne 2016-05-13 05:32:54 UTC

pushed in changeset 12116:09f5230a2fe3