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TCH Blocking over 100%..is it possible ?

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  • #50610 Reply
    Sierra
    Guest

    Dear All,

    I have problem with my network, especially TCH allocation for several sectors facing blocking exceed in more than 100 %. Is it possible? Thanks b4.

    #50611 Reply
    Pix
    Guest

    more than 100% blocking rate ? No it is not possible.. Is it hapening only at some hours of the day, or 24h per day ?

    If 24h/d, then it might be a counter problem. As the processes that count the counters are located in the BSC, you could try to reboot those processes.

    #50612 Reply
    Bassam
    Guest

    Actually, there are many reasons for high TCH blocking rate,for example, in ur case ,i think it is lack of TCH resources, I mean you may have a cell with small noumber of TCH(small noumber of TRXS)& this cell may be located in highly populated area,So ,the TCH of this cell being always bussy and this certenly cause high THC blocking rate.
    Another reason for high TCH blocking rate is that your antenna sector is rongly directed and suffer over shotting ,it also cause lack of TCH resources.
    Another reason for TCH blocking rate is HO, you have to check ur HO parameters setting(outgoing & incoming HO threshold.
    IF you find no proplem in above points, then you have to check your STATISTIC TASK in UR KPI report.
    If any body can tell us more or give his openion ,please let’s share knowledg.

    Best Regards

    #50613 Reply
    Pix
    Guest

    Bassam, it’s just impossible to have 100% congestion or more.

    100% congestion means that there is absolutely no traffic that is carried : all the traffic is rejected.

    More than 100% means that there is actually more traffic rejected than required. Not possible in our sad little world. ๐Ÿ™‚

    An extremely congested cell would have around 60% TCH “call setup” congestion rate, at most… (in my experience)

    #50614 Reply
    AD
    Guest

    piX, i have seen more than 80% congestion on a cell…
    (Alcatel’s equipment is weird ๐Ÿ™‚

    #50615 Reply
    pix
    Guest

    AD, i meant “usually 60%”.. 80% could happen, it all depends on how long you look at the RNO scren ๐Ÿ™‚

    alcatel is not weird ๐Ÿ˜›

    #50616 Reply
    raj
    Guest

    What are the reasons for abnormal tch blocking.where traffic is much less than the tch availabilty.

    #50617 Reply
    Jeff
    Guest

    hey guys ,

    i had experince like this before and i found that the statistics server connected to 3 MSS together and all values were multiplied by 3 , so , as PIX said before , it should be a counter problem , it’s impposible to get more than 100 % tch drop

    #50618 Reply
    Pix
    Guest

    we are talking about tch blocking (or congestion), but anyway, the logic remains valid ๐Ÿ™‚

    cheers
    pix

    #50619 Reply
    Akshaya
    Guest

    Can any one Suggest me How to remove the TCH Blocking in Nokia System.
    Note: Sector having 2 ET.
    Configuration: 8 TRX
    FRL/FRU–AFRL/AFRU-80 & 90
    Utilisation: Below 90%
    NBL- Main-0. EXP-2
    Lseg-Main -30, EXP-70

    Regrds..Akshaya

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