If you are referring to the DMO (Database Migration Option) of SUM then it is applicable only for migrating the systems to HANA and also to Sybase ASE.
Read note 1813548 - Database Migration Option (DMO) of SUM
In you case you will need to follow the standard Combined Upgrade & Unicode Conversion (CU&UC) approach as the database is Oracle.
For more info on CU&UC - 928729 - Combined Upgrade & Unicode Conversion (CU&UC)
Cheers
RB