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14th October 2010 at 07:46 #64671Sarada PrasannaGuest
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 reply14th October 2010 at 10:31 #64672korgiGuest
Can you check the CSSR formula in your network?14th October 2010 at 10:45 #64673MFGuest
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).14th October 2010 at 15:19 #64674Red_SatanGuest
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.10th November 2010 at 15:48 #64675jayaGuest
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..