On Sat, Apr 02, 2005 at 11:28:42AM -0500, Brian Reichert wrote:
I guess everything listed here, with a URL to an up-to-date list:
<http://customerproducts.atheros.com/customerproducts>
In perusing many of these cards specs, I see many of them offer a 'turbo mode' of 108 Mbps.
- Is this something magically supported by the hardware? By that, I mean: if I use a compatible WiFi card in a laptop, they'll just negotiate the higher rate, and as such the kernel driver has no impact?
Turbo mode is an Atheros-specific thing that bonds two channels to double the effective bandwidth. I know of no other vendor that implements it. There are various techniques for increasing the effective bandwidth of an 802.11 medium; none are standardized (yet).
- I'm seeing 'turbo 802.11g' vs. 'Super G'. I haven't found any thing that tells me if these are synonyms, or if they are incompatable unofficial extansions of a spec. Does anyone here know?
SuperG is a label for a number of different features that are implemented as Atheros-specific protocol extensions. Other vendors can implement most of them (Atheros has released the details of these extensions) but it's unlikely you'll find many vendors picking them up. I have code that implements most of SuperG (only compression is missing) but haven't committed any of these yet (not sure when I'll do this and/or if all warrant going in FreeBSD).
Turbo 11g is the use of Atheros Turbo mode in the 2.4GHz band. This is only possible on channel 6 as you need to bond two channels and is permitted only when non-Turbo-capable stations are detected. Consequently it's really only useful in the 2.4 band in a private environment. OTOH you can operate in 11a (5GHz) with more freedom and SuperG can easily get you transfer rates upwards of 60 Mb/s.
Sam _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
