R12.1.3 EBS and DB -11.2.0.4 Migration from AIX to Linux (Exadata)

We are planning to migrate our R12.1.3 EBS Environment (11.2.0.4 DB + R12.1.3 Application ( 1 DB Node + 1 Application Node) ) to Exa environment. Could you please suggest me the best possible approach for this migration activity.

Source Environment:

DB Version : 11.2.0.4

EBS Version: 12.1.3

Nodes: 1 Db Node with Aix 64 bit + 1 Application node with Aix 32 Bit.

We are planning to migrate DB and applications to Exa environment. Please suggest me the best possible approach with less downtime.

I have also referred few notes, but lot of information putting me in confusion with various restrictions at various levels.

Thanks

Srinivas E