HOATTLSS pegged when the serving cell was lower than HYSTSEP
HOATTHSS pegged when the serving cell was higher than HYSTSEP
HOTOHCS pegged when HO happened due to HCS
HODWNQA **Attempts at low downlink quality
HOUPLQA ** Attempts at low uplink quality
HOEXCTA ** Attempts at TA.
HOASBCL Assignment to better cell
HOASWCL Assignment to worst cell
Attempt means only a decision. It will not be converted to a command if target cell has congestion etc.
I hope it helps.