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Extended Erlang B

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #32362 Reply
    Brian
    Guest

    I’m familiar with the Erlang B anc C equations but what is the formula for the Extended Erlang B (which includes call retries)? What’s a good reference book for practical telecom engineering?

    Thanks,
    Brian

    #32363 Reply
    Ayal
    Guest

    Hello Brian,

    I think I have the answer for you.

    You are welcomed to contact me at: Ayal@gilat.com

    #32364 Reply
    Menachem Shapira
    Guest

    Shalom Ayal,

    Could you please send me any ref. of traffic provisioning calculations in particular regarding IP (VoIP).

    Thanks.

    #32365 Reply
    Nabil Ahmed
    Guest

    Ayal,

    I am interested in knowing the Extended Erlang B formula. I appreciate your assistance

    My e-mail is datavision@usa.net

    Thanks,
    Nabil Ahmed

    #32366 Reply
    Imran Bhatti
    Guest

    Ayal,

    Could you please send me any ref. of traffic provisioning calculations. I’m also not familiar with the Erlang B anc C equations.

    Actually, I am planning to model SVCs and PVCs in an ATM network, with these equations.

    Thanks,
    Imran Bhatti

    #32367 Reply
    Mwenya
    Guest

    Ayal,
    Could you please send me extended erlang B formula as well as erlang B formula
    Contact me at Mwenya_m@excite.com

    Mwenya.

    #32368 Reply
    Mwenya
    Guest

    Ayal,
    Could you please send me extended erlang B formula as well as erlang B formula
    Contact me at Mwenya_m@excite.com

    Mwenya.

    #32369 Reply
    Santy
    Guest

    Erlang B
    Calculates traffic in loss systems. If a request is not served when it is offered to the resource then it is lost. These systems can be considered as non-queued. This model assumes the blocked traffic is immediately cleared.
    Erlang B formula
    :Eb(0, t) = 1 \\,
    :Eb(r,t) = { {t Eb(r-1,t)} \\over {r+t Eb(r-1,t)} } \\,
    where:
    Eb is the probability of blocking
    r is the number of resources.
    t is the number of Erlang offered

    Extended Erlang B
    This formula is essentially Erlang B, but assumes that a certain percentage of the system, when blocked will immediately represent themselves to the system. This formula can account for this retry percentage.

Viewing 8 posts - 1 through 8 (of 8 total)
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