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Math Help - Erlang Help

  1. #1
    Newbie
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    Aug 2009
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    Erlang Help

    I'm looking at the following question:

    If a Network switch handles 100 requests every minute and the average request duration is 250 milliseconds, compute the traffic volume at the switch in Erlang.

    I worked out this:



    Erlang =


    Average call duration___
    Average interarrival time

    100 requests per minute
    = 100 X 60 = 6000 requests per hour

    Average interarrival rate = 60/6000
    = 0.01 minutes = average inter arrival time

    How do I convert 0.01 minutes to miliseconds??
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  2. #2
    Senior Member Danneedshelp's Avatar
    Joined
    Apr 2009
    Posts
    303
    Quote Originally Posted by mikebyrne View Post
    I'm looking at the following question:

    If a Network switch handles 100 requests every minute and the average request duration is 250 milliseconds, compute the traffic volume at the switch in Erlang.

    I worked out this:



    Erlang =


    Average call duration___
    Average interarrival time

    100 requests per minute
    = 100 X 60 = 6000 requests per hour

    Average interarrival rate = 60/6000
    = 0.01 minutes = average inter arrival time

    How do I convert 0.01 minutes to miliseconds??
    Basically, you want to cancel out your other units until you are left with your desired units as such

    0.01min\times\\ \frac{60sec}{1min}\times\\ \frac{1\times10^{3}ms}{1sec}= what you are looking for.
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