When interferer is a single frequency or with spectrum width limited, it can be sufficient to change frequencies on impacted sites.
When disturbance is a spread over a large portion of spectrum, it could be necessary to add selective filters in BTS receiving section.
In terms of parameters, it can be better to deactivated intracell handover flag(s), EN_INTRA_UL, EN_INTRA_DL, or even HO_Intracell_Allowed.