Hi Daraphan,
I would suggest to implement your own scheduler, that is aware of the type of base station, for which it has to assign ressources in that TTI. How you decide which ressources are blanked depends on your strategy and you also have to make sure that the scheduler has knowledge of this and acts accordingly.
Since usually ABS comes in conjunction with CRE, you might want to refer to this post, discussing the association strategies in the simulator:
Best regards,
Martin