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High SD drop even at low traffic

Viewing 4 posts - 1 through 4 (of 4 total)
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  • #54975 Reply

    Hi experts,
    I am facing one problem that, in one site even at low traffic SDCCH drop is high(avg 60%,).(Sec-A high SD drop) .
    Pls suggest to rectify the issue.


    #54976 Reply


    if the sd drop was suddenly high:

    Try to lock/unlock the TCU carrying this cell, it should solve the problem.

    if the sd drop is a little high, for a very long time:
    it’s probably the radio problem, related to interferences or bad coverage, or poor path balance.

    #54977 Reply

    Hi Pix,
    there is no hardware problem.
    It has been thoroughly checked.

    I have decreased the MAXTA & LIMTA value after thAT SD drop decreased but TCH drop abnormally increased.

    Pls suggest to rectify the issue.


    #54978 Reply

    grrrr! I posted a long msg and it didn’t get published.

    Ok, to sum up:
    lock all TRX
    unlock only one TRX at a time, for few hours, then repeat for the other TRX. Goal is to push TCH and SDCCH traffic onto the same TRX.

    In the QoS check if only one TRX is having the problem, or if the problem happens during each trial.

    Other possibility, if traffic is really low : you have one faulty MS in your cell (i’ve seen this before). You need to isolate the faulty MS in your MSC (I’ve no idea how to do that though…)


Viewing 4 posts - 1 through 4 (of 4 total)
Reply To: High SD drop even at low traffic
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