[MLB-WIRELESS] OpenWRT long distance utility

[Brenton D.]

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
>>
>>>
>>
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>>.
>>
>>
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