Moving an Oracle DB with ArcSDE to a new server

Moving an Oracle DB with ArcSDE to a new server

I have a task of moving an oracle database with SDE (geodatabase) to a new
server. I don't have experience in Oracle so I need detailed explanation
if possible, so I need to know what is the best way to do this task.
The source server is Windows Server 2008 R2
The source database server is Oracle10g
The destination server is Windows Server 2008 R2
The destination database server in Oracle11g