Counter for checking Idle mode UE latching to BTS

Dear Experts.
Any counter for checking Idle mode UE latching to BTS?
Vendor is NOKIA.

There is no counter in EnodeB ,only in MME Side when a UE change tracking area or change technology.

Because signalling procedures are between the Non-Access Stratum (NAS) layers of the UE and core network so are not visible to the eNodeB.