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SDCCH utilization

Viewing 13 posts - 1 through 13 (of 13 total)
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  • 27th November 2009 at 02:28 #59784
    cool
    Guest

    hi.. has anybody experienced this? i have a cell with only ~15% sdcch utilization but experiencing sdcch blocking. what could be the cause? thanks..

    27th November 2009 at 16:15 #59785
    raman
    Guest

    hardware issue….or media having errors ….

    29th November 2009 at 13:21 #59786
    Jaspreet
    Guest

    Hi

    It may be due to LAC boundaries.
    Also check neighbouring cell’s LAC
    due to frequent updations SD blocking is occuring.

    Hope this help.
    //BR
    Jaspreet

    30th November 2009 at 13:52 #59787
    Bijoy
    Guest

    Hi jaspreet.
    Dont you think SDCCH peak Utilisation will be high in case of very High LU.

    Br\\
    Bijoy

    30th November 2009 at 19:34 #59788
    Jaspreet
    Guest

    bijoy sir,

    you are right(I misread the question as only SD blocking) but In case it is utilized at peak then it wud lead to SD congestion not Blocking because at that time no attempt for SD channel will be made so no point of blocking.

    If I m wrong then, you can pls elaborate this as it wud add to my knowledge.

    thanks

    1st December 2009 at 05:37 #59789
    Bijoy
    Guest

    Hi Jaspreet
    Which system are you working on?
    That would help me to explain better.
    Also I would like to rectify you that even if there is no free SDCCH (i,e SDCCH Congestion),BSC has no intelligence that it will prevent MS for SDCCH requests to that cell.

    Br\\
    Bijoy

    3rd December 2009 at 14:42 #59790
    Jaspreet
    Guest

    Hi Bijoy

    I m working on huawei system.

    4th December 2009 at 05:04 #59791
    Bijoy
    Guest

    Ok Jaspreet
    If in Huawei system you are facing such type of issue,check for the following
    1.check for HDLC congestion.
    2.Check whether you have set “Concentric cell”=”yes” for a normal cell.
    3.Check if the feature “Dynamic MAIO” is kept “ON”

    Br\\
    Bijoy

    4th December 2009 at 09:26 #59792
    MAkarand S Dere
    Guest

    Hi Bijoy,

    Can SDCCH hop & In case of SDCCH when on Non BCCH TRX will radiate by which freq.

    4th December 2009 at 10:49 #59793
    Bijoy
    Guest

    Makarand
    SDCCH TS will hop if on Hopping TRX,otherwise not.

    4th December 2009 at 12:43 #59794
    kenji
    Guest

    hi bijoy.. how about in nokia system? what should i check when im experiencing sd blocking but low utilization? please help.. thanks,,

    6th December 2009 at 07:22 #59795
    Austin
    Guest

    I have this alarm for nokia bts – Working SDCCH channel below threshold. please i need assistant on howto resolve this issue. thanks.

    7th December 2009 at 05:04 #59796
    Bijoy
    Guest

    Kenji
    Check my reply on the topic”Abrupt nature of SDCCH Blocking in N/W”.
    Austin
    This ratio is set in BSC .The parameter name is “ALSDC”.The recommended value is 30%.
    To handle this alarm,you can check the following
    1.If any TRX containing SDCCH has gone faulty or blocked.
    2.If the parameter ALSDC is set too high.
    3.Wheteher Dynamic SDCCH is disabled

    Br\\
    Bijoy

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