handover threshold with cause UPLINK is one parameter, but it depends also on Handover averaging parameters for level handover (parameter defines the size of the gliding averaging window and the
DTX weighting factor for the uplink and downlink RXLEV
measurements for level handovers).
If you set this parameter to low. There will be a lot drops and HO due to QUALITY. But in reality it could be between 8 and 3 (Handover Threshold (dBm) = -110dBm + HOLTHLVUL)