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

Discussion in 'Wireless Internet' started by Al Dykes, Dec 19, 2004.

  1. Al Dykes

    Al Dykes Guest

    Does the "g" client get slowed down when the "b" client is active ?
     
    Al Dykes, Dec 19, 2004
    #1
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  2. 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
     
    Daniel Bennett, Dec 19, 2004
    #2
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  3. Al Dykes

    AndrewJ Guest

    Yes.
     
    AndrewJ, Dec 19, 2004
    #3
  4. No! At least not if its a recent one. See many threads on this in the past.
     
    Mark McIntyre, Dec 19, 2004
    #4
  5. It didn't on mine, but I no longer use b anymore anyway.

    Daniel
     
    Daniel Bennett, Dec 19, 2004
    #5
  6. Al Dykes

    gary Guest

    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.
     
    gary, Dec 19, 2004
    #6
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