As I know in Alcatel PArameter, there is no EN_IR_DL, There are only EN_IR_UL and EN_RESEGMENTATION_UL.
Based on ALU Documentation, EN_IR_UL should be activated (ENABLE).The activation of both at the same time may reduce the gain
of the Incremental Redundancy
But why does the default value is 0 (it means DISABLE)?
If EN_IR_UL is ENABLE, supposedly it increase the accessibility and attainability of UL_Tbf_Establshment, but I don’t know why in your case it caused DL_TBF_DropRate.
Need your help 🙂