Community discussions

MikroTik App
 
wirdo
Frequent Visitor
Frequent Visitor
Topic Author
Posts: 72
Joined: Fri Jun 18, 2004 8:50 pm

XR - when?

Fri Oct 01, 2004 8:38 pm

Great feature on new atheros cards is available for 4-5 months already but not in routeros yet... please update drivers to include it. Thanks!
 
User avatar
mag
Member
Member
Posts: 376
Joined: Thu Jul 01, 2004 12:32 pm
Location: Cologne, NRW, Germany
Contact:

Re: XR - when?

Sat Oct 02, 2004 10:17 am

could you explain a bit, what feature this is and why it would be important to have it?

tia.
matthias
 
wirdo
Frequent Visitor
Frequent Visitor
Topic Author
Posts: 72
Joined: Fri Jun 18, 2004 8:50 pm

Sat Oct 02, 2004 11:24 am

ask google.
 
User avatar
stephenpatrick
Forum Veteran
Forum Veteran
Posts: 702
Joined: Fri Aug 20, 2004 12:26 pm
Location: UK
Contact:

Sat Oct 02, 2004 12:26 pm

Looking on the web at some articles:

http://www.theregister.co.uk/2003/09/15 ... ifi_range/

http://wireless.ittoolbox.com/browse.as ... aper%2Epdf

http://www.networkcomputing.com/showite ... D=15200422

It is a proprietary "WiFi extension" on the later chipsets, which "supports low SNR operation". Atheros claims a 3x range extension.
Not sure whether this is supported in MT, I guess not yet, I would expect to see an 'XR' switch to enable/disable.

Regards

Stephen
 
User avatar
mag
Member
Member
Posts: 376
Joined: Thu Jul 01, 2004 12:32 pm
Location: Cologne, NRW, Germany
Contact:

Sun Oct 03, 2004 12:32 am

Not sure whether this is supported in MT, I guess not yet, I would expect to see an 'XR' switch to enable/disable.
thanks for the links, i have seen d-link has boxes (e.g. DWL-2100AP) claiming to use XR. as the white paper states, it works by improving sensibility down to -105 dB and lowering bandwith below 1mbps so it seems to me a technique mostly for the low-cost 802.11g market.

if it is an atheros chipset feature, it should probably not too difficult to make an XR option-switch. nice to have, but not very important.

regards,
matthias
 
User avatar
Hammy
Forum Veteran
Forum Veteran
Posts: 776
Joined: Fri May 28, 2004 5:53 pm
Location: DeKalb, IL
Contact:

Tue Oct 05, 2004 6:56 pm

if it is an atheros chipset feature, it should probably not too difficult to make an XR option-switch. nice to have, but not very important.
but wouldn't squeezing a couple extra db out of a link be worth a simple switch?
 
User avatar
mag
Member
Member
Posts: 376
Joined: Thu Jul 01, 2004 12:32 pm
Location: Cologne, NRW, Germany
Contact:

Tue Oct 05, 2004 9:00 pm

but wouldn't squeezing a couple extra db out of a link be worth a simple switch?
as i said: a nice to have low-cost-market feature.
i know what a good receive-amplifier with -105dB costs, therefore i do not think atheros is using such one. the white paper does not mention any other radio parameters too.

regards,
matthias
 
jonbrewer
Member Candidate
Member Candidate
Posts: 182
Joined: Sat Jun 05, 2004 5:56 am
Location: Wellington, New Zealand
Contact:

Fri Oct 22, 2004 12:51 pm

but wouldn't squeezing a couple extra db out of a link be worth a simple switch?
as i said: a nice to have low-cost-market feature.
i know what a good receive-amplifier with -105dB costs, therefore i do not think atheros is using such one. the white paper does not mention any other radio parameters too.

regards,
matthias
Hi Matthias,

I think you have not read about Atheros XR. The receive sensitivity is really this good.

Having XR support means that connections will hold on for another 10db and won't just drop at -92.

This is very important where we can only use 5.2-5.3 GHz at max EIRP of 250mW.

Look at Atheros website!

Cheers,

Jon
 
User avatar
Hammy
Forum Veteran
Forum Veteran
Posts: 776
Joined: Fri May 28, 2004 5:53 pm
Location: DeKalb, IL
Contact:

Fri Oct 22, 2004 5:21 pm

Are all modulations increased, or are there just additional ones?

Who is online

Users browsing this forum: elvtechnology, NetTecture and 72 guests