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Concurrent calls

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #59346 Reply
    kdriver
    Guest

    Hi,

    Can anyone give a rough figure for expected busy hour concurrent calls given a subscriber base. ( lets say 2 million? )

    Regards,

    Keith

    #59347 Reply
    Pix
    Guest

    Hello kdriver,

    the number of calls is not really relevant, what matters more is the volume of traffic (erlangs)

    25mErl / subscriber @ BH x 2 millions = 50 000 erlangs

    assuming average call duration of 50 seconds (rather realistic )
    50.000 erl / 50 = 1.000 calls

    So 2 millions subsribers (typical subscribers) will generate about 1000 calls of 50 seconds, at busy hour, during one hour.

    To handle 50k Erlangs, you need about 600 BTS with 4/4/4 configuration ๐Ÿ™‚

    Cheers,
    pix

    #59348 Reply
    kdriver
    Guest

    Thanks Pix. That gives me the answers I was looking for.

    Is 25mErl/sub an industry standard figure?

    What do you mean by 4/4/4 configuration for the BTS?

    Cheers,

    Keith

    #59349 Reply
    Pix
    Guest

    Keith,

    Yes, 25mErl/sub is a typical figure

    4/4/4 : 1 BTS with 3 sectors, and 4 TRX per sector.

    Sector 1 = 4 TRX
    Sector 2 = 4 TRX
    Sector 3 = 4 TRX

    … 4/4/4 … ๐Ÿ™‚

    #59350 Reply
    Pan
    Guest

    Hello, guys! ๐Ÿ™‚
    Sorry, Pix, but 50 000 Erlangs is enough great value. But 1000 calls per hour is enough small value.
    Load intensity=50 000 erl represents the total holding time (in sec)= (50 000*3600)= 180000000.
    And, hence,
    BHCA=(180000000/50)=3600000 calls, i.e 1,8 calls per subscriber in busy hour.
    B.R.

    #59351 Reply
    pix
    Guest

    hi pan,

    50.000 erl = # calls * (50s / 3600s)

    therefore :

    1/ # calls = 3.6 millions
    2/ you are 100% right
    3/ i’m embarassed ๐Ÿ™‚

    was i drunk when i replied to this message ?

    :))

    thanks for correcting me !

    Cheers & happy new year,
    -pix

    #59352 Reply
    Pan
    Guest

    Hello, Pix!
    Happy New Year! ๐Ÿ™‚

    #59353 Reply
    TDC
    Guest

    How to change Erlang to MBPS?

    Suppose i have 1000 Erlang in bussy hours, and my max number of concurent call is 1500, so how could found the utilization based on 1500 concurrent call usage?

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