Archived from groups: alt.internet.wireless (
More info?)
RTS/CTS and CTS-to-self are message sequences used on 802.11g networks when
802.11b clients are present. 802.11b doesn't decode 802.11g frames, so these
short messages (encoded in a way that 802.11b understands) are used to
reserve the network for 802.11g transmissions.
But any 802.11b network overlapping the channel you are using will
significantly degrade you. Check your site survey, be sure you don't see any
APs within 5 channels of you. If you do, change channels.
"Dan Brill" <news@mangoed.com> wrote in message
news:JySqc.4856652$iA2.566229@news.easynews.com...
> Hi,
>
> Thanks for your reply - I'm not sure what RTS/CTS and CTS-to-self are.
> Perhaps you could suggest something which might explain these terms to me?
>
> Certainly, I'm getting between 9 and 10Mbps and there are *no* 11b
clients.
> I there any easy way to benchmark network performance? I've been using the
> free version of Ixia Qcheck to get throughput figures.
>
> To be honest, I've been having so many problems over the last few weeks
with
> the wireless-networking kit I've purchased (frequent disconnects, crashing
> configuration utilities, low speed, hanging data transfers, etc.) that I
> wish I'd stuck with my old wired network but it's a bit late now. Still,
if
> I ever achieve any semblance of real functionality then it'll be worth it!
>
> -dan
>
> "Aaron Leonard" <Aaron@Cisco.COM> wrote in message
> news:r0nna05mpmj853998gks1bchci28n643pp@4ax.com...
> > ~ A quick question: what sort of real-world throughput should I be
seeing
> on
> > ~ an 802.11g (54Mbps, perfect signal) wireless network? I'm getting less
> than
> > ~ 10Mbps, which a friend I spoke to said seemed about right, but I was
> reading
> > ~ an article today in the computer press where it was stated that they
> were
> > ~ getting about double this (20Mbps). Which, if either, is closest to
> correct?
> > ~
> > ~ -dan
> > ~
> >
> > Both are right ... if there are no 11b clients audible from the AP in
the
> > channel, then 20-24Mbps should be possible. If any 11b clients can be
> heard,
> > then if the AP is using RTS/CTS protection, then expect 8-9Mbps; if
using
> > CTS-to-self, then expect 12-14Mbps.
> >
> > Note that these numbers represent maximum aggregate throughput with
large
> > frames. A single stream data transfer between two given computer can of
> > course yield less due to mistuned TCP stacks, disk I/O bottlenecks or
> > what have you.
> >
> > Aaron
>
>
>