Move Database instance from one host to other host

Dear All,

We have a central system where CI and database instance are on a single system. Now we need to move the database instance to a different host.

Is the process like we need to export / import (System copy) or is there any other way to perform the process?

The database is Oracle 10.2.0.2

And the OS is AIX.

Kindly suggest at the earliest...

Regards,

Phani.