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SDCCH Congestion

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  • #64107 Reply
    mj
    Guest

    Kindly Help
    What causes SDCCH congestion and how to reduce SDCCH congestion

    #64108 Reply
    mat
    Guest

    hi
    the SDCCH congestion may be due to the following cases :
    1/ not enaugh SDcch time slot recommanded value is one SD/TRX .
    2/ the cell is border so there is a lot of location up date ; check CRH and T3212 timer
    3/ BCCH type combiner or not because there is two kind of SDCCH:
    SDCCH/4 ( 4 sud channels ) SDCCH/8 (8 sub channels )
    4/chech if there is a SMS traffic in this area

    #64109 Reply
    Hasan
    Guest

    From my experience I’ve seen when other operator or roamers’ ms try for location update it is rejected, they again try and going on try. In this way SD is congested. There is a parameter called “PLMN Not Allowed” in MSC side which can prevent suck kind of behaviour.

    #64110 Reply
    SD
    Guest

    add SD

    #64111 Reply
    mj
    Guest

    its not only about capacity issues.
    faulty hardware might also cause some sdcch ts not work or some parameter setting like t1232 also affects the usage of sdcch channels

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