[MLB-WIRELESS] OpenWRT long distance utility

[Ratbaggy]

Hi Brenton,

I read somewhere that DD-WRT was based on an early Sveasoft and as such you
may not be able to use IPKG to install the dependancies.

The two units I've used are flashed with Freifunk which IS based on Open
WRT.  On one of them I installed the dependancy (Wireless-Tools) properly
with IPKG, on the other I only copied the file (libiw.so.28) that dctrl
winged about not finding (to /usr/lib) and it still worked perfectly.  The
dctrl binary was only copied to /usr/sbin in both.

A quick and dirty solution may be to try the same thing on DD-WRT, you have
nothing to lose!

Dave.

----- Original Message ----- 
From: "Brenton D." <ivile01 at yahoo.com.au>
To: "vak" <vak at alphalink.com.au>; "Ratbaggy" <wireless at smithsgully.net>
Cc: <secretary at melbournewireless.org.au>; <melbwireless at wireless.org.au>
Sent: Friday, March 03, 2006 9:51 AM
Subject: Re: [MLB-WIRELESS] OpenWRT long distance utility


> Hi,
> is it possible to get this for dd-wrt? or install it on a dd-wrt flashed
> wrt?
>
> ----- Original Message ----- 
> From: "vak" <vak at alphalink.com.au>
> To: "Ratbaggy" <wireless at smithsgully.net>
> Cc: <secretary at melbournewireless.org.au>; <melbwireless at wireless.org.au>
> Sent: Thursday, March 02, 2006 7:23 PM
> Subject: Re: [MLB-WIRELESS] OpenWRT long distance utility
>
>
> > That is an AWESOME improvement!!!
> >
> > Ratbaggy wrote:
> >
> >>Hi Dan and All,
> >>
> >>I am pleased to report that the utility works very well indeed.  I've
> >>experimented on our 14 km link between Blackburn North and Kangaroo
Ground
> >>(ILW to HKG) and the throughput (doing a http download) has gone from
> >>around
> >>60 KBytes/S to......
> >>
> >>Now wait for it..........
> >>
> >>Excuse me for getting a little excited........
> >>
> >>1130 KILOBYTES PER SECOND!!!!!!!!!!!!!!
> >>
> >>There are WRT54G Ver 2's running on each end with Freifunk version 1.1.4
> >>firmware.  Antennas are 24 dB Hills grid and 19 dB Panel.
> >>
> >>This link doesn't have a great path and the line of sight skims across
the
> >>roofs at the Blackburn end and the signal strength as reported on the
> >>crappy
> >>WRT radios is -77 dBm with noise at -94.
> >>
> >>My recommendation with setting the "distance" for dctrl is to start at
> >>double the distance and reduce the number to the point where throughput
> >>reaches a maximum.  Shortly beyond this point the throughput will drop
> >>drastically.  In our case with the 14 k link the optimum speed was
> >>achieved
> >>with the parameter set to about 21000 but we backed it off to 22000.  I
> >>suspect the programmer may not have made allowance for the round trip
> >>delay.
> >>
> >>Due to the poor signal to noise ratio on our link optimum performance
was
> >>achieved with the radios locked to 18 Megabits per second, any faster or
> >>slower and the performance dropped off.  With another 10 dB of signal to
> >>noise I suspect some further gains may be possible although at this
point
> >>the router may run out of steam before the radios.
> >>
> >>The settings that were used:
> >>
> >>WLAN Mode: Ad Hoc
> >>Radio Mode: G Mode Performance (whatever that means)
> >>Transmission Rate: 18 MBits/S
> >>CTS Protection: Disabled
> >>Frame Burst: Enabled
> >>/usr/sbin/dctrl 22000
> >>
> >>For other links with different S/N and distances Transmission Rate and
> >>dctrl
> >>will need to be optimised.  Hopefully some others can do some more
> >>experimenting on different links.
> >>
> >>Dave.
> >>
> >>----- Original Message ----- 
> >>From: "Dan Flett" <conhoolio at hotmail.com>
> >>To: <melbwireless at wireless.org.au>
> >>Sent: Monday, February 20, 2006 8:24 PM
> >>Subject: [MLB-WIRELESS] OpenWRT long distance utility
> >>
> >>
> >>
> >>>Hi all,
> >>>
> >>>I've found a few links regarding a utility for OpenWRT/broadloom-based
> >>>routers.
> >>>
> >>>The utility is called dctrl and it works quite simply - you just put in
> >>>
> >>the
> >>
> >>>distance of the link as a parameter and it tweaks the broadcom radio
> >>>
> >>timing
> >>
> >>>settings to be optimal for that distance.
> >>>
> >>>You can get it here:
> >>>http://openwrt.inf.fh-brs.de/~nbd/dctrl.
> >>>
> >>>Further discussion of link tests here:
> >>>http://forum.bsr-clan.de/viewtopic.php?p=10530.
> >>>http://forum.openwrt.org/viewtopic.php?id=4447
> >>>http://forum.openwrt.org/viewtopic.php?pid=21034
> >>>
> >>>I'd be keen to hear if people with WRT-based long-distance links have
any
> >>>success with this.
> >>>
> >>>Regards,
> >>>
> >>>Dan Flett
> >>>Secretary
> >>>Melbourne Wireless
> >>>_______________________________________________
> >>>Melbwireless mailing list
> >>>Melbwireless at wireless.org.au
> >>>http://wireless.org.au/mailman/listinfo/melbwireless
> >>>
> >>>
> >>>-- 
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> >>>
> >>17/02/2006
> >>
> >>>
> >>
> >>_______________________________________________
> >>Melbwireless mailing list
> >>Melbwireless at wireless.org.au
> >>http://wireless.org.au/mailman/listinfo/melbwireless
> >>
> >>.
> >>
> >>
> > _______________________________________________
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> > Melbwireless at wireless.org.au
> > http://wireless.org.au/mailman/listinfo/melbwireless
>
>
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