Ping times of ethernet, 802.11a,b,g,n back to router?

Discussion in 'PC Hardware' started by kocoman, Jan 2, 2010.

  1. kocoman

    kocoman MDL Senior Member

    May 16, 2007
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    Can anyone list the ping times of (from ie: computer to router)

    1) ethernet,
    2) 802.11a,
    3) b
    4) g
    5) n

    Why does wireless not have <1ms ping time compared to ethernet?
     
  2. 2centsworth

    2centsworth MDL Senior Member

    Feb 12, 2008
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    Overhead of the 802.11 specs.

    Wired LAN pings peer to peer should be 1ms.
     
  3. kocoman

    kocoman MDL Senior Member

    May 16, 2007
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    Is there any site that says HOW MUCH the overhead is, is 802.11n ping speed comparable to wired?

    thanks
     
  4. 2centsworth

    2centsworth MDL Senior Member

    Feb 12, 2008
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    None I am aware of, it would serve no purpose.

    Wired is instantaneous (186,000 miles per second) but rewrapping a packet and sending it via radio (and back) has some minor inherent overhead....and interference and obstacles can affect radio transmissions, even destroy packets requiring a rebroadcast of the packet for reassembly which can introduce delays, again all part of the 802.11x protocols.

    Is there something specific you're trying to do?
     
  5. kocoman

    kocoman MDL Senior Member

    May 16, 2007
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    I used the USB to ethernet program under linux.

    for wifi it would be USB to wifi..

    but with ethernet the USB packets are fine, no drops, etc.

    but with 802.11b+g, the connection is poor (even though I connected with g, the b 'space coding' or something has to follow the b timeframe for legacy compatibility, thus slowing it down??),

    then I tried 802.11g only then it became better, but still bad compared to wired,

    but what about 802.11n.. if I buy a 802.11n and force 802.11n only will it help make it more near to wired ping times?

    there's another newer "space coding" thinggy again at 802.11n, so I wonder if it will help or not.

    for my application the usb packets need to come on time, or the device "hangs/not responsive"

    sorry about the capitalization problems, I didn't want the reply to look "run on"..

    thanks