Cells Causing DL Interference (GSM)

Dear Radio Experts,

I am trying to an exercise to identify the cells in our 2G network which are serving beyond AOI or overshooting, and creating DL interference.

I know there’re ways to identify and rectify DL interference via DT etc. But I want to do this exercise on city level and pinpoint problematic cells via network statistics. I tried using TA stats (samples per TA) but I am afraid they were not much useful, as due to TA Limitation, dummy stats appear after TA3.

So any idea how can I identify overshooting cells via stats? Any help will be appreciated !!

P.S. We are using 1×1, and SFH.