Ok, i understand your problem. Put clearly, it means that there is no “power budget HO” between the 2 cells. Possible causes :
– probably different layers or different bands (mini, micro, umbrella, indoor ? 900 / 1800 ?)
– or the target cell is congested or in high load (…and traffic HO is enabled with high Delta Inc HO)
I have a strong suspicion on the different bands/layers.
The ping pong hcp is just 15dB, so it will not prevent HO at 60dB difference 🙂 And ping pong HCP is used only at the 2nd HO, returning into the previous cell…
What are the layer type of each cell ?
If the DT is locked on 900, the target cell is not 1800, is it ?