Now, please try to explain me something?
I turned it off the 3G cells (DEA all 3G Cells in this site) to test and somethings the CSFB works to 2G (BLIND REDIRECTION and INTERRATHIGHESTPRI=UTRAN).
How the KPI to CSFB 3G still working in this site?
Sometimes I saw with the DT Team that CSFB worked to 2G (3G was OUT).
How do I have CSFB to 3G and not for 2G?
(3G and 2G belongs to the same BSS).
So, in BLIND the KPI always peg in highest priority. Right?
Another explanation for not having the CSFB KPI for 2G is that when the call went to 2G, the mobile must have registered on the network, after having lost signal and received a page. This would be the reason for not having CSFB for 2G, because it wasn’t actually CSFB.
Yes, because frequency and NBR selection is second step while RAT selection is first step.
eNB will select highest priority RAT for blind redirection, since its blind it will redirect it wether 3G is there or not.
Counter 2G not pegging isssue.
Better to do measurement based and give CSFB protection timer of 2-4s.
If measurement based failed on 3G then it will blindly redirect to next technology.