On Tue, 13 Dec 2005 23:48:35 GMT, "fj" <(E-Mail Removed)> wrote:
>
>"Jeff Liebermann" <(E-Mail Removed)> wrote in message
>news:(E-Mail Removed).. .
>> On Tue, 13 Dec 2005 19:31:47 GMT, "fj" <(E-Mail Removed)> wrote:
>>
>>>What is the expected hit to performance in b/g mixed mode vs g only?
>>
>> I finally get to use the FAQ. Neato.
>> Max theoretical speeds:
>> http://en.wikibooks.org/wiki/FAQ_for...ance_and_Speed
>> 802.11g only is 24.4Mbits/sec max.
>> 802.11b/g mixed is 14.4Mbits/sec max.
>>
>>
>>>Currently, there's four workstations all wirelessly connected thru a
>>>Linksys
>>>WRT54G. Two of the workstations are g, two are b.
>>>The two b workstations are using a Linksys b adapter. The other two
>>>workstations are using Linkskey g adapters. [FWIW, I thought I was
>>>getting
>>>Linksys g adapters]
>>
>> That's nice. Any particular client model numbers?
>> So what speeds are you getting with each mode?
>I'm not worried about the actual performance - I'm just trying to understand
>if there is a performance hit in mixed mode networks vs pure g mode. So,
>will the g mode adapters run slower in a mixed mode network than if they are
>in a g only network?
Yes. What happens is that the access point switches between "g" mode
and listens for any "b" packets every once in while. If it hears just
one "b" packet, it will time slice between "g" and "b", even if there
is no "b" traffic (i.e. traffic from the neighbors). The exact amount
of time that the access point listens for "b" clients varies by
implimentation, but it's substantial (about 40%). While the access
point is listening for "b" traffic, all "g" traffic just stops.
--
Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
831.336.2558 voice
http://www.LearnByDestroying.com AE6KS
http://802.11junk.com Skype: JeffLiebermann
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