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tch blocking and tch congestion

Viewing 15 posts - 16 through 30 (of 99 total)
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  • #52039 Reply
    mm
    Guest

    whatis the difference between SDCCH drop and congestion

    #52040 Reply
    help me
    Guest

    can you help me?
    mean: TCh mean holding time

    #52041 Reply
    Mzescavt
    Guest

    Thanks funny site

    #52042 Reply
    pix
    Guest

    tch mean holding time: average duration during which a TCH timeslot is allocated to a certain call.

    for instance TCH MHT = 20s, it means that your subscribers get a TCH for 20 seconds. Then they probably handover to another cell, so the TCH in this cell is deallocated.

    This is NOT the average call duration. You should look at the MHT along with the “HO per Call” indicator.
    As far as i remember:
    call duration = TCH MHT * (HOperCall + 1)

    #52043 Reply
    ahmed
    Guest

    what’s the difference when we say

    1- Call success rate > = < % 2- Call set up > = < %

    #52044 Reply
    pix
    Guest

    call success rate = call setup sucess rate * (100% – call drop rate)

    #52045 Reply
    Ayat
    Guest

    Dear Pix

    Some vendor define Call success (100-Call drop rate(%)).

    could you explain yhese formula

    call success rate = call setup sucess rate * (100% – call drop rate)

    #52046 Reply
    pix
    Guest

    as you said, it is vendor dependent.
    the formula is quite simple… call success is representing the success of a call, from call setup to the call release.

    it’s a very global indicator.

    the (100% – call drop rate) is useless, because it’s just another way of displaying the call drop ratE. It shows exactly the same info, there is no value-added to such indicator.

    #52047 Reply
    abdel
    Guest

    hello
    can you tell me how i can calculate the HOpercall

    thanks

    #52048 Reply
    pix
    Guest

    number of TCH established for incoming HO / number of TCH established by “normal” call setup

    #52049 Reply
    nitin
    Guest

    what is mean holding time

    #52050 Reply
    pix
    Guest

    nitin,

    = duration of a call, in average.

    #52051 Reply
    nitin
    Guest

    how can we define cell utilization??????

    #52052 Reply
    Ayat
    Guest

    Hello

    Cell utilization -Traffic (erl)*100/Traffic design (ERL table (B))

    Eg

    CELl utilization Per CELL

    Cell _1 with real traffic =10 erl
    and TCH=12 channel and GOS =2%

    so we have to review erlang table B , we will find the design traffic at TCH = 12 and GOS =2% =6.615

    Design traffic =6.615 so cell utilization = 10*100/6.615

    i hope it is clear

    #52053 Reply
    nitin
    Guest

    thnx Ayat..

Viewing 15 posts - 16 through 30 (of 99 total)
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