[Prism54-users] tweaking prism54 was: ack & cts timeout and slottime for log distance links in prism54 driver

[Ivan]

OK, it seems that I have no luck with finding these parameters.. can 
somebody tell me any other way to tweak this card for long range (now I 
have singal strenhgt of about -78 and I can't get anything better from 
antenna system, I have 26dB grid and short LMR400 cable).. The main 
problem is high and unstable ping packet reply, with frequent 
disconnecting and reconnecting from AP...

Is there any way to tweak it for performance? I have already set up

# iwpriv eth0 s_profile 2
# iwpriv eth0 s_preamble 0
# iwconfig eth0 retry 200
# iwpriv etho s_edthresh 50

which seems that helps a bit.

What can I do more? Please..

Thank you very much!

Ivan


Ivan wrote:

> Hi Luis,
>
> yes, I know it should be in iwpriv set of parameters, but which ones? 
> I don't see any named like "ack" or "cts" or "slottime", only ones I 
> found, that sound like could be, are:
>
> s_dtimperiod,
> s_maxtxlife and
> s_maxrxlife.
>
> Are these parameters what I need? And, if they are, how to set them 
> correctly? Where I can found any info about that? There is no info at
> http://prism54.org/phpwiki?pagename=Prism54%20Private%20Wireless%20ioctls
>
> Can someone point me in right direction?
>
> Thank you very much,
>
> Ivan
>
>
> Luis R. Rodriguez wrote:
>
>> On Sun, Apr 03, 2005 at 06:44:02PM +0200, Ivan wrote:
>>  
>>
>>> Hello!
>>>
>>> In madwifi driver for atheros based cards, there is possibility to 
>>> change ack and cts timeout values, and slottime, according to 
>>> distance between transmitter and receiver. They recommend to adjust 
>>> these values for every link longer than 300 meters. I have a link of 
>>> 2 kilometers, and big trouble with performance with Intersil Frisbee 
>>> card (in same setup, acx100 based card works excellent, giving 
>>> 500kB/s throughput and very stable ping reply od about 2ms, but this 
>>> is only b standard). Now with Intersil Frisbee card ping is not 
>>> stable, and speed.. shame to say :-( Yes, at 1M bitrate.. for 
>>> comparision, acx100 runs on 11M without any problem.
>>>
>>> Now, I wish to try some tweaking, to make link better if possible. 
>>> First thing, I would like to try adjust ack & cts timeouts, if that 
>>> is supported with this driver. Can someone put some light on these 
>>> please? If that doesn't help, then I would like to try do more 
>>> troubleshooting with your help, but first I would like to adjust 
>>> these values if possible.
>>>   
>>
>>
>> iwpriv eth1
>>
>>     Luis
>>
>>  
>>
>
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