What happens when an 810.11g AP has "b" and "g" clients at the same time ?

Does the "g" client get slowed down when the "b" client is active ?





--

a d y k e s @ p a n i x . c o m

Don't blame me. I voted for Gore.

"Al Dykes" <(E-Mail Removed)> wrote in message
news:cq4b5u$s6m$(E-Mail Removed)...
> Does the "g" client get slowed down when the "b" client is active ?

I have the new Belikin Mimo Router. At present it seems to run b stuff at b
speeds and g stuff at g speeds, I don't have any mimo adaptors yet, thats my
next purchase in the new year.

Daniel

>Does the "g" client get slowed down when the "b" client is active ?

Yes.

On Sun, 19 Dec 2004 15:55:42 -0500, in alt.internet.wireless , AndrewJ
<(E-Mail Removed)> wrote:

>
>>Does the "g" client get slowed down when the "b" client is active ?
>
>Yes.

No! At least not if its a recent one. See many threads on this in the past.

--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt>

"AndrewJ" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
>>Does the "g" client get slowed down when the "b" client is active ?
>
> Yes.

It didn't on mine, but I no longer use b anymore anyway.

Daniel

"Mark McIntyre" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Sun, 19 Dec 2004 15:55:42 -0500, in alt.internet.wireless , AndrewJ
> <(E-Mail Removed)> wrote:
>
>>
>>>Does the "g" client get slowed down when the "b" client is active ?
>>
>>Yes.
>
> No! At least not if its a recent one. See many threads on this in the
> past.

I recall some posts on this, but I'm having a hard time finding the right
keyword combination to find them in the archives. Could you repost a link to
articles or whitepapers explaining this? Did it have something to do with
Nitro?

Some pre-final-standard G APs didn't support the protection mechanism, and
that there may be some efficiency improvements in traffic control from the
AP to the client. Using the protection mechanism will certainly help, and
grouping G frames will improve downstream throughput.

But the standard still requires that the AP send all downstream broadcast
traffic in a mixed network at a "BSS basic rate set" rate, which means 11
Mbps or less. The protection mechanism uses RTS or CTS/RTS messages at these
rates. Also, if you have many B clients pushing data upstream (or intranet
to other wifi stations) at rates 5 times slower than the G clients, it
unavoidably affects overall throughput.

Also, if you are geting cochannel interference from a neighboring network,
the neighboring AP is supposed to hear the protection RTS messages from your
AP. If it's older B or G equipment, it may not be compliant. Even if it is
compliant, if it's a busy B net it will chew your bandwidth if it's close
enough.

Bottom line, it all depends on the traffic mix.

>
> --
> Mark McIntyre
> CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
> CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt>