To upgrade an Oracle schema from version 11.1.6.0 to 11.1.1.9, first navigate to the Oracle Home bin directory. Run the PSA tool to start the upgrade wizard. Select the component to upgrade along with any prerequisites and enter connection details for the MDS and SOAINFRA schemas. Monitor the installation process and then verify the schema versions have updated correctly.

1. How to Upgrade Schema from 11.1.6.0 to 11.1.1.9.0 in 11g Oracle
First we need to go Oracle Home bin in Linux machine. This is located at below location.
/u07/oracle/middleware/oracle_common/bin
 As the middleware owner change directory to $MW_HOME/oracle_common/bin
 Run the following command to start the PSA wizard
./psa.sh
 Click Next to start entering details
 Select the component you want to upgrade, it will include all the prerequisites.

2.  Selectthe prerequisitecheckboxestosayyouhave backedup yourenvironment.

3.  Enter connectiondetailsforthe MDSschema
 Enter connectiondetailsforthe SOAINFRA schema

4.  Checkthat all schemasconnectsuccessfully.If notgoback and correct.
Make sure all the settingare correct and continue

5.  Watch the install run,thencomplete
 Nowyoucan checkthe versionof the schemasto ensure theyare correct.For that we are
usingbelowquery.
SELECT owner, version, status FROM schema_version_registry
where owner in ('WCI_MDS', 'WCI_SOAINFRA');