ZTR304A: CELL_RATE_TCH_CALL_DROP_EXCLUDE_HO
This measurement provides the ratio of TCH call drops (excluding handover) to successful TCH seizures (excluding handover).
%.
At the end of the granularity period, this counter is calculated by using the following formula.
Call Drop Ratio on TCH per cell(Excluding Handover) = [Call Drops on the Traffic Channels] x {100}/([Successful TCH Seizures (Traffic Channel)] + [Successful Incoming Internal Inter-Cell Handovers] + [Successful Incoming External Inter-Cell Handovers] - [Successful Outgoing Internal Inter-Cell Handover] - [Successful Outgoing External Inter-Cell Handovers])