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traffic loss

Viewing 7 posts - 1 through 7 (of 7 total)
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  • #52718
    RF
    Guest

    Dear All

    can anybody explain to me how to calculate the traffic loss ( due to the congestion)

    Regards

    #52719
    pix
    Guest

    a tch congestion of 2% means that 2% of your TCH assignment requests are rejected. Multiply this amount by the average duration of a call, and that gives you the traffic loss.

    #52720
    RF
    Guest

    Hi Pix

    for example I have 80% Congestion in my cell then i want to know the traffic offered so i should multiplay it by the average duration of call ?

    Regardss

    #52721
    pix
    Guest

    80% TCH congestion, and how many TCH requests ?

    #52722
    RF
    Guest

    hi

    let’s say 1000 TCH request

    #52723
    pix
    Guest

    80% of the 1000 requests are rejected –> 800 requests are rejected, in one hour.

    800 TCH requests could lead to 800 * 30s of TCH occupancy, if you assume that an average call duration is 30seconds, AND if you assume there is 1 TCH request for 1 call request.

    For such high congestion, you should assume that there is at least 2 requests for 1 call request (call is re-attempted by subscriber)

    So in your situation : 400 * 30s = 12,000 s of occupancy is rejected, so it’s about “12,000/3600” erlang that are “lost”.

    #52724
    RF
    Guest

    thanks a lot Pix for your explaination

Viewing 7 posts - 1 through 7 (of 7 total)
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