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Query on count of CSSR

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  • #64671 Reply
    Sarada Prasanna

    My query is —

    1. I am working with Motorola system( Dual Band).
    In some cells I am finding CSSR value more tha 100% (which is impossible in real).

    What could be the reason for this? And also how can I solve this problem?

    2. In some cells I am finding there is no SD Drop,no SD Block, no TCH block. But still my CSSR value is poor ( around 70%)in BBH KPI.
    What could be the reason and solution?

    Thanks in Advance for reply

    #64672 Reply

    Can you check the CSSR formula in your network?

    #64673 Reply

    it will be helpful to share your KPI formula to know how it is. sometimes some main counter/objects/formulas are not set properly. in TEMS you can see sometimes that in a logfile the call End number is more than call Setup, for example call end= 104, call setup=88 which shows something new…, but if you check the call attempt/call attempt retry, you will find the issue(even you can find the missed counters in formula from this logfile).

    #64674 Reply

    Hi Sarada Prasanna,

    I have a little experience about Motorola equipment so i can share with you.

    1, Some cells have CSSR are more than 100% due to:
    In Motorola system have handover SDCCH. You can check on database of site.
    If SDCCH_ho is enable then CSSR may be more than 100%. The problem happens when an SDCCH handover occurs during a call set-up attempt. “This causes the call set-up success rate on the source cell to report low and the call set-up success rate on the target cell to report high. This is due to the OK_ACC_PROC call attempt statistic [call set-up success rate denominator] pegging on the source cell with the TOTAL_CALLS call success statistic [call set-up success rate numerator] pegging on the target cell. The source cell ends up with a call attempt but no success and the target cell ends up with a call success but no attempt.”

    2. If TCH no block but CSSR is still poor. Can you check with MSC for investigating proplem.

    #64675 Reply

    hi.. actually i am new with this technology and still have much things to learn more.

    last week i have done calibrating the radio for motorola. before i do the calibrating, there is no alarm reporting for LOW CSSR FOR SECTOR 1 AND 3. but a week after i done the calibrating for sector 1,2 & 3, they (Network Management Center) told me that the alarm LOW CSSR sector 1 & 3 is shown up.

    could anyone here can help me, what is the cause for this problem..


Viewing 5 posts - 1 through 5 (of 5 total)
Reply To: Query on count of CSSR
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