Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages

TRX calculation

  • This topic is empty.
Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • #56303 Reply
    sam
    Guest

    Hi pix,
    In one cell (3TRX) I have over 60% tch congestion. I want to increase the trx. Is there having any formula for excel to calculate required trx to overcome from this congestion please?

    BR//
    Sam

    #56304 Reply
    pix
    Guest

    hi sam,

    you could look at the erlang table to find out how much capacity you should have.

    3 TRX = 21 channels capa
    erlangB(21 channels, 60% cong) = 51 erlangs of incoming ‘offered’ traffic

    you should have enough capacity to welcome 51 erlangs @ 2%
    Erlang B (51 erl, 2% cong) = 62 channels

    that’s about 9 TRXs

    now, you have to take into account call repetition.. if each user tries to connect 3 times for one call, the actual cong% is only 20%.
    –> 22.8 erlangs offered
    –> you need 4.5 TRX.

    Basically, you need 4 TRX with HR activated, or at least 5 TRX in FR.

    #56305 Reply
    sam
    Guest

    Thanks pix. Thank you very much.

    #56306 Reply
    Pix
    Guest

    Just to be clear, i assume a call repetition = 3, but that’s not a parameter. It’s a subscriber behaviour.

    It might be more or less important, i don’t know 🙂

    #56307 Reply
    Gerald
    Guest

    SDCCH accessibility =

    Number of SDCCH Success/ (Total Number of SDCCH Attempt – Not defined)

    #56308 Reply
    MOJI
    Guest

    Dear Pix.
    would u please share your formula to calculate erlangB(170 channels, 50% cong) =???
    thanx

    #56309 Reply
    AKS
    Guest

    Pl told me – how TRX capacity calculated????

Viewing 7 posts - 1 through 7 (of 7 total)
Reply To: TRX calculation
Your information:




<a href="" title="" rel="" target=""> <blockquote cite=""> <code> <pre class=""> <em> <strong> <del datetime="" cite=""> <ins datetime="" cite=""> <ul> <ol start=""> <li> <img src="" border="" alt="" height="" width="">